/* style.css - 今年会（中国）官方网站 - JNH SPORTS */
/* 全局重置与基础 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background: #0b0f1c;
    color: #e4e7ed;
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

body.dark {
    background: #0b0f1c;
    color: #e4e7ed;
}

a {
    color: #4b8aff;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #7aa5ff;
}

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

/* 容器 */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 毛玻璃效果 */
.glass {
    background: rgba(255, 255, 255, 0.06);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* 按钮 - 渐变 */
.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    background: linear-gradient(135deg, #1a73e8, #6c3cf0);
    color: #fff;
    box-shadow: 0 4px 20px rgba(26, 115, 232, 0.3);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(26, 115, 232, 0.5);
}

/* 区块 */
.section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff, #8ab4f8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-sub {
    font-size: 1.2rem;
    color: #a0aec0;
    max-width: 600px;
    margin-bottom: 60px;
}

/* 网格与布局 */
.grid {
    display: grid;
    gap: 32px;
}

.flex {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

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

.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }
.relative { position: relative; }
.overflow-hidden { overflow: hidden; }

/* 头部导航 */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 12px 0;
    transition: background 0.3s;
}

header.scrolled {
    background: rgba(11, 15, 28, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, #1a73e8, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    list-style: none;
}

.nav-links li a {
    display: block;
    padding: 8px 16px;
    border-radius: 40px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #cbd5e1;
    transition: all 0.3s;
}

.nav-links li a:hover,
.nav-links li a.active {
    background: rgba(26, 115, 232, 0.2);
    color: #fff;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.8rem;
    cursor: pointer;
}

/* Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 20% 50%, rgba(26, 115, 232, 0.2), transparent 70%),
                radial-gradient(ellipse at 80% 50%, rgba(108, 60, 240, 0.15), transparent 70%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
}

.hero h1 {
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    background: linear-gradient(135deg, #fff, #a0c4ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.3rem;
    color: #a0aec0;
    margin-bottom: 40px;
}

.hero .btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero 轮播 */
.hero-slider {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 300px;
    border-radius: 32px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    display: none;
}

@media (min-width: 1024px) {
    .hero-slider {
        display: block;
    }
}

.slider-item {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s;
}

.slider-item.active {
    opacity: 1;
}

.slider-item svg {
    width: 100%;
    height: 100%;
    border-radius: 32px;
}

/* 品牌介绍 */
.brand-intro .grid {
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.brand-intro .text-block p {
    font-size: 1.1rem;
    color: #b0bec5;
    margin-bottom: 20px;
}

.brand-intro .stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
}

.brand-intro .stats div {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
}

.brand-intro .stats span {
    font-size: 0.9rem;
    color: #8899aa;
    display: block;
}

/* 品牌故事 */
.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.story-grid .story-text p {
    font-size: 1.05rem;
    color: #b0bec5;
    margin-bottom: 16px;
}

/* 企业文化卡片 */
.culture-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
}

.culture-card {
    padding: 32px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s;
    text-align: center;
}

.culture-card:hover {
    background: rgba(26, 115, 232, 0.1);
    transform: translateY(-4px);
}

.culture-card svg {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    fill: #4b8aff;
}

.culture-card h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.culture-card p {
    color: #8899aa;
    font-size: 0.95rem;
}

/* 团队介绍 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
}

.team-card {
    padding: 24px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    text-align: center;
    transition: all 0.3s;
}

.team-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.08);
}

.team-card svg {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, #1a73e8, #6c3cf0);
    padding: 12px;
}

.team-card h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.team-card span {
    color: #8899aa;
    font-size: 0.85rem;
}

/* 产品中心 */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.product-card {
    padding: 32px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s;
    text-align: center;
}

.product-card:hover {
    background: rgba(26, 115, 232, 0.1);
    transform: translateY(-4px);
}

.product-card svg {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    fill: #4b8aff;
}

.product-card h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.product-card p {
    color: #8899aa;
    font-size: 0.95rem;
}

/* 产品优势 */
.advantage-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.advantage-item {
    padding: 28px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    gap: 16px;
    align-items: flex-start;
    transition: all 0.3s;
}

.advantage-item:hover {
    background: rgba(26, 115, 232, 0.08);
}

.advantage-item svg {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    fill: #4b8aff;
}

.advantage-item h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.advantage-item p {
    color: #8899aa;
    font-size: 0.9rem;
}

/* 解决方案 */
.solution-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.solution-card {
    padding: 32px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    text-align: center;
    transition: all 0.3s;
}

.solution-card:hover {
    background: rgba(108, 60, 240, 0.1);
    transform: translateY(-4px);
}

.solution-card svg {
    width: 56px;
    height: 56px;
    margin: 0 auto 16px;
    fill: #a855f7;
}

/* 行业应用 */
.industry-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}

.industry-item {
    padding: 24px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    text-align: center;
    transition: all 0.3s;
}

.industry-item:hover {
    background: rgba(255, 255, 255, 0.08);
}

.industry-item svg {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    fill: #4b8aff;
}

/* 数据统计 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 24px;
    text-align: center;
}

.stat-item {
    padding: 32px 16px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.stat-item .num {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #1a73e8, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-item .label {
    color: #8899aa;
    font-size: 1rem;
    margin-top: 8px;
}

/* 客户案例 */
.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.case-card {
    padding: 24px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s;
}

.case-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-4px);
}

.case-card svg {
    width: 100%;
    height: 180px;
    border-radius: 16px;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #1a73e8, #6c3cf0);
    padding: 16px;
}

.case-card h3 {
    font-size: 1.2rem;
    margin-bottom: 6px;
}

.case-card p {
    color: #8899aa;
    font-size: 0.9rem;
}

/* 合作客户 */
.client-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    padding: 40px 0;
}

.client-logos svg {
    width: 100px;
    height: 50px;
    opacity: 0.5;
    transition: opacity 0.3s;
    fill: #8899aa;
}

.client-logos svg:hover {
    opacity: 1;
    fill: #fff;
}

/* 客户评价 */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.testimonial-card {
    padding: 32px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    position: relative;
}

.testimonial-card::before {
    content: "\201C";
    font-size: 4rem;
    position: absolute;
    top: 8px;
    left: 20px;
    color: #1a73e8;
    opacity: 0.3;
    font-family: serif;
}

.testimonial-card p {
    color: #b0bec5;
    font-style: italic;
    margin-bottom: 16px;
}

.testimonial-card .author {
    font-weight: 600;
    color: #fff;
}

.testimonial-card .role {
    color: #8899aa;
    font-size: 0.85rem;
}

/* 新闻资讯 */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.news-card {
    padding: 24px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s;
}

.news-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-4px);
}

.news-card .date {
    color: #8899aa;
    font-size: 0.85rem;
    margin-bottom: 8px;
}

.news-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
}

.news-card p {
    color: #a0aec0;
    font-size: 0.95rem;
}

/* 相关文章 */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

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

.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    cursor: pointer;
}

.faq-item .question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.1rem;
    font-weight: 500;
}

.faq-item .question .icon {
    font-size: 1.5rem;
    transition: transform 0.3s;
}

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

.faq-item .answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    color: #b0bec5;
    padding-top: 0;
}

.faq-item.open .answer {
    max-height: 300px;
    padding-top: 16px;
}

/* HowTo 步骤 */
.howto-steps {
    max-width: 700px;
    margin: 0 auto;
    counter-reset: step;
}

.howto-step {
    display: flex;
    gap: 20px;
    margin-bottom: 32px;
    align-items: flex-start;
    padding: 24px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.howto-step .step-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1a73e8, #6c3cf0);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.howto-step h4 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.howto-step p {
    color: #8899aa;
    font-size: 0.95rem;
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-info p {
    font-size: 1.05rem;
    color: #b0bec5;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.contact-info svg {
    width: 24px;
    height: 24px;
    fill: #4b8aff;
    flex-shrink: 0;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 20px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    color: #fff;
    font-size: 1rem;
    margin-bottom: 16px;
    outline: none;
    transition: border 0.3s;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: #1a73e8;
}

.contact-form textarea {
    min-height: 120px;
    resize: vertical;
}

/* 友情链接 */
.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}

.friend-links a {
    color: #8899aa;
    font-size: 0.9rem;
    padding: 6px 14px;
    border-radius: 30px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s;
}

.friend-links a:hover {
    color: #fff;
    border-color: #1a73e8;
}

/* 网站地图 */
.sitemap-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 24px;
}

.sitemap-grid h4 {
    font-size: 1rem;
    margin-bottom: 12px;
    color: #fff;
}

.sitemap-grid a {
    display: block;
    color: #8899aa;
    font-size: 0.9rem;
    padding: 4px 0;
    transition: color 0.3s;
}

.sitemap-grid a:hover {
    color: #4b8aff;
}

/* 页脚 */
.footer {
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 40px 0 20px;
    font-size: 0.9rem;
    color: #8899aa;
}

.footer .container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.footer a {
    color: #8899aa;
}

.footer a:hover {
    color: #fff;
}

/* 返回顶部 */
.back-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1a73e8, #6c3cf0);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1.5rem;
    box-shadow: 0 4px 20px rgba(26, 115, 232, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
}

.back-top.show {
    opacity: 1;
    visibility: visible;
}

/* 搜索模态框 */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(12px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.search-modal.open {
    display: flex;
}

.search-modal input {
    width: 80%;
    max-width: 500px;
    padding: 18px 24px;
    border-radius: 50px;
    border: none;
    font-size: 1.2rem;
    outline: none;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.search-modal input::placeholder {
    color: #8899aa;
}

.search-modal .close-search {
    position: absolute;
    top: 30px;
    right: 40px;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    background: none;
    border: none;
}

/* 面包屑导航 */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 16px 0;
    font-size: 0.9rem;
    color: #8899aa;
}

.breadcrumb a {
    color: #4b8aff;
}

.breadcrumb span {
    color: #a0aec0;
}

/* EEAT 信息 */
.eeat-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    padding: 32px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    margin-top: 40px;
}

.eeat-info h4 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    color: #fff;
}

.eeat-info p {
    color: #8899aa;
    font-size: 0.9rem;
}

/* 分页 */
.pagination {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 40px;
}

.pagination a {
    padding: 10px 18px;
    border-radius: 30px;
    background: rgba(255, 255, 255, 0.06);
    color: #a0aec0;
    transition: all 0.3s;
    font-size: 0.9rem;
}

.pagination a:hover,
.pagination a.active {
    background: #1a73e8;
    color: #fff;
}

/* 暗黑模式切换按钮 */
.dark-mode-toggle {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.3rem;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: background 0.3s;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        background: rgba(11, 15, 28, 0.95);
        padding: 16px;
        border-radius: 24px;
        margin-top: 12px;
    }

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

    .menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .brand-intro .grid,
    .story-grid,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .brand-intro .stats {
        flex-wrap: wrap;
        gap: 20px;
    }

    .hero-slider {
        display: none;
    }

    .footer .container {
        flex-direction: column;
        text-align: center;
    }

    .back-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
    }

    .search-modal input {
        width: 90%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

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

    .btn {
        padding: 12px 24px;
        font-size: 0.9rem;
    }

    .section {
        padding: 60px 0;
    }
}