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

:root {
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --accent: #10b981;
    --accent-light: #06d6a0;
    --white: #ffffff;
    --gray-light: #94a3b8;
    --gray: #64748b;
    --gray-dark: #334155;
    --text-dark: #1e293b;
    --border: #e2e8f0;
}

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--white);
    color: var(--text-dark);
    line-height: 1.8;
}

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

body{
    font-family:'Inter',sans-serif;
    background:#f7f7f9;
    color:#111;
    overflow-x:hidden;
}

/* ===== Background ===== */

body::before{
    content:'';
    position:fixed;
    top:-200px;
    right:-200px;
    width:500px;
    height:500px;
    background:radial-gradient(circle,#8b5cf615 0%,transparent 70%);
    z-index:-1;
}

body::after{
    content:'';
    position:fixed;
    bottom:-250px;
    left:-200px;
    width:600px;
    height:600px;
    background:radial-gradient(circle,#a855f710 0%,transparent 70%);
    z-index:-1;
}
.case-body-box img, .case-body-box video {max-width:100%}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-dark);
    padding: 0 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-logo .logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: var(--white);
    font-size: 18px;
}

.nav-logo span {
    color: var(--white);
    font-size: 20px;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: 40px;
    list-style: none;
}

.nav-menu a {
    color: var(--gray-light);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--white);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
}

.nav-contact {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--white);
    font-size: 14px;
}

.nav-contact i {
    color: var(--accent);
}

/* 顶部留白 */
.top-space {
    height: 70px;
}

/* 面包屑 */
.breadcrumb {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.breadcrumb a {
    color: var(--gray);
    text-decoration: none;
    transition: color 0.3s;
}

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

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

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

/* 文章主体 */
.article-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px 60px;
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 40px;
}

.article-main {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
}

.article-header {
    padding: 30px 40px;
    border-bottom: 1px solid var(--border);
}

.article-tag {
    display: inline-block;
    background: var(--accent);
    color: var(--white);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 13px;
    margin-bottom: 15px;
}

.article-header h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    line-height: 1.4;
    margin-bottom: 20px;
}

.article-meta {
    display: flex;
    gap: 30px;
    color: var(--gray);
    font-size: 14px;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 6px;
}

.article-meta i {
    color: var(--gray);
}

.article-content {
    padding: 40px;
}

.article-content h2 {
    font-size: 22px;
    color: var(--text-dark);
    margin: 35px 0 20px;
    padding-left: 15px;
    border-left: 4px solid var(--accent);
}

.article-content p {
    color: #475569;
    margin-bottom: 20px;
    font-size: 16px;
}

.article-content img {
    max-width: 100%;
    border-radius: 8px;
    margin: 25px 0;
}

.article-content ul {
    margin: 20px 0;
    padding-left: 25px;
}

.article-content li {
    color: #475569;
    margin-bottom: 12px;
    font-size: 16px;
}

.article-highlight {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(6, 214, 160, 0.05));
    border-left: 4px solid var(--accent);
    padding: 20px 25px;
    margin: 30px 0;
    border-radius: 0 8px 8px 0;
}

.article-highlight p {
    color: var(--text-dark);
    font-weight: 500;
    margin: 0;
}

/* 上下篇导航 */
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
}

.article-nav-item {
    padding: 20px;
    background: #f8fafc;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.article-nav-item:hover {
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.1), rgba(6, 214, 160, 0.05));
}

.article-nav-item.next {
    text-align: right;
}

.article-nav-item span {
    display: block;
    font-size: 12px;
    color: var(--gray);
    margin-bottom: 5px;
}

.article-nav-item a {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s;
}

.article-nav-item:hover a {
    color: var(--accent);
}

/* 侧边栏 */
.sidebar {
    position: sticky;
    top: 90px;
    height: fit-content;
}

.sidebar-widget {
    background: var(--white);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 2px 15px rgba(0,0,0,0.06);
}

.sidebar-widget h3 {
    font-size: 18px;
    color: var(--text-dark);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent);
}

.related-article {
    display: flex;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.3s;
}

.related-article:last-child {
    border-bottom: none;
}

.related-article:hover {
    opacity: 0.8;
}

.related-article img {
    width: 80px;
    height: 60px;
    border-radius: 6px;
    object-fit: cover;
}

.related-article .info h4 {
    font-size: 14px;
    color: var(--text-dark);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 5px;
}

.related-article .info span {
    font-size: 12px;
    color: var(--gray);
}

.hot-article {
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.3s;
}

.hot-article:last-child {
    border-bottom: none;
}

.hot-article:hover .rank-title {
    color: var(--accent);
}

.hot-article .rank-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: var(--bg-dark);
    color: var(--white);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-right: 10px;
}

.hot-article .rank-title {
    font-size: 14px;
    color: var(--text-dark);
    transition: color 0.3s;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    padding: 60px 60px 30px;
    color: var(--gray-light);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto 40px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 20px;
}

.footer-col p {
    font-size: 14px;
    line-height: 1.8;
    color: var(--gray);
}

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

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: var(--gray);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: var(--accent);
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact i {
    color: var(--accent);
    width: 16px;
}

.footer-bottom {
    border-top: 1px solid var(--gray-dark);
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: var(--gray);
    max-width: 1200px;
    margin: 0 auto;
}

/* 响应式 */
@media (max-width: 1024px) {
    .navbar {
        padding: 0 30px;
    }
    .article-container {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0 20px;
    }
    .nav-menu {
        display: none;
    }
    .article-header {
        padding: 20px;
    }
    .article-header h1 {
        font-size: 24px;
    }
    .article-content {
        padding: 20px;
    }
    .article-nav {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
}
    
/* ===== Hero ===== */

.case-hero{
    padding:120px 20px 80px;
    text-align:center;
}

.case-label{
    display:inline-block;
    font-size:13px;
    letter-spacing:4px;
    text-transform:uppercase;
    color:#8B5CF6;
    margin-bottom:28px;
    font-weight:700;
}

.case-title{
    max-width:1000px;
    margin:auto;
    font-size:68px;
    line-height:1.08;
    font-weight:800;
    letter-spacing:-2px;
    color:#111827;
}

.case-meta{
    margin-top:28px;
    font-size:15px;
    color:#6b7280;
}

/* ===== Container ===== */

.case-container{
    max-width:1000px;
    margin:auto;
    padding:0 20px 120px;
}
.video-case {padding-bottom:30px;}
/* ===== Content Card ===== */

.case-content{
    background:#fff;
    border-radius:32px;
    padding:70px;
    box-shadow:
    0 10px 40px rgba(0,0,0,.04),
    0 2px 10px rgba(0,0,0,.03);
    border:1px solid rgba(0,0,0,.04);
}

/* ===== Rich Text ===== */

.case-content h2{
    font-size:40px;
    line-height:1.2;
    margin:70px 0 24px;
    color:#111827;
    font-weight:700;
}

.case-content h3{
    font-size:28px;
    margin:50px 0 20px;
    color:#111827;
}

.case-content p{
    font-size:18px;
    line-height:2;
    color:#4b5563;
    margin-bottom:28px;
}

.case-content strong{
    color:#111827;
}

.case-content img{
    width:100%;
    display:block;
    border-radius:24px;
    margin:55px 0;
}

.case-content blockquote{
    margin:55px 0;
    padding:10px 0 10px 30px;
    border-left:4px solid #8B5CF6;
    font-size:24px;
    line-height:1.7;
    color:#111827;
    font-weight:600;
    background:#faf7ff;
}

.case-content ul{
    padding-left:20px;
    margin-bottom:30px;
}

.case-content li{
    margin-bottom:14px;
    color:#4b5563;
    line-height:1.8;
}

.case-content a{
    color:#8B5CF6;
    text-decoration:none;
    font-weight:600;
}

.case-content a:hover{
    text-decoration:underline;
}

/* ===== Responsive ===== */

@media(max-width:768px){

    .case-hero{
        padding:90px 20px 60px;
    }

    .case-title{
        font-size:42px;
        letter-spacing:-1px;
    }

    .case-content{
        padding:35px 24px;
        border-radius:24px;
    }

    .case-content h2{
        font-size:30px;
    }

    .case-content p{
        font-size:16px;
        line-height:1.9;
    }

    .case-content blockquote{
        font-size:20px;
    }

}