/* 官网子页公共样式（与首页设计说明书 tokens 一致） - 科技感增强版 */
:root {
    --color-bg-page: #f6f7f9;
    --color-bg-card: #fff;
    --color-text-primary: #1a1d29;
    --color-text-secondary: #5c6370;
    --color-text-muted: #8b929e;
    --color-brand: #2d3548;
    --color-accent: #3d7cff;
    --color-accent-hover: #5b94ff;
    --color-border: #e6e8ec;
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    --radius-sm: 6px;
    --radius-md: 8px;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 20px rgba(61, 124, 255, 0.3);
    --shadow-glow-lg: 0 0 40px rgba(61, 124, 255, 0.4);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
        "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.site-subpage {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.65;
    color: var(--color-text-primary);
    background: var(--color-bg-page);
    padding-top: 72px;
    -webkit-font-smoothing: antialiased;
}
a { color: var(--color-accent); text-decoration: none; }
a:hover { color: var(--color-accent-hover); }
img { max-width: 100%; height: auto; display: block; }
.w1200 { max-width: 1200px; margin: 0 auto; padding: 0 var(--space-md); }
@media (min-width: 768px) { .w1200 { padding: 0 var(--space-lg); } }

/* 顶栏（内页默认浅色顶栏） */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 72px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.nav-logo {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-brand);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}
.nav-logo svg { flex-shrink: 0; }
.nav-menu { display: flex; align-items: center; gap: var(--space-xl); list-style: none; margin: 0; padding: 0; }
.nav-link {
    color: var(--color-text-secondary);
    font-size: 15px;
    font-weight: 500;
    padding: var(--space-sm) 0;
    position: relative;
}
.nav-link:hover, .nav-link.active { color: var(--color-brand); }
.nav-link.active::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-accent);
}
.nav-cta {
    display: inline-flex;
    align-items: center;
    padding: 10px 20px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #5B94FF 100%);
    color: #fff !important;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    box-shadow: 0 4px 15px rgba(61,124,255,0.3);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}
.nav-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}
.nav-cta:hover::before {
    left: 100%;
}
.nav-cta:hover {
    background: linear-gradient(135deg, var(--color-accent-hover) 0%, #7AABFF 100%);
    color: #fff !important;
    box-shadow: 0 6px 20px rgba(61,124,255,0.4), 0 0 30px rgba(61,124,255,0.2);
    transform: translateY(-1px);
}
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--space-sm);
    background: none;
    border: 0;
}
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--color-text-primary); }
@media (max-width: 991px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        padding: var(--space-lg);
        gap: var(--space-md);
        box-shadow: var(--shadow-md);
    }
    .nav-menu.open { display: flex; }
    .menu-toggle { display: flex; }
    .nav-cta { display: none; }
}

/* 页头横幅 - 科技感增强 */
.page-header {
    background: linear-gradient(135deg, #1a1d29 0%, #2d3548 100%);
    color: #fff;
    padding: var(--space-2xl) 0;
    margin-bottom: var(--space-xl);
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(61,124,255,0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(61,124,255,0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}

.page-header::after {
    content: '';
    position: absolute;
    top: 50%;
    right: 10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(61,124,255,0.1) 0%, transparent 70%);
    pointer-events: none;
    transform: translateY(-50%);
}

.page-header h1 {
    margin: 0 0 var(--space-sm);
    font-size: 28px;
    font-weight: 600;
    text-shadow: 0 0 20px rgba(61,124,255,0.3);
}
.page-header p { margin: 0; opacity: 0.85; font-size: 15px; }

.page-content { padding-bottom: var(--space-3xl); }

/* 粒子画布 */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* 滚动显示动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.active {
    opacity: 1;
    transform: translateX(0);
}

.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.active {
    opacity: 1;
    transform: scale(1);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* 3D Card Tilt */
.tilt-3d {
    will-change: transform;
    transition: transform 0.15s ease-out;
}

/* Skeleton Loading */
@keyframes skeleton-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}
.skeleton {
    background: linear-gradient(90deg, #e8ecf3 25%, #f0f3f8 37%, #e8ecf3 63%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.6s ease-in-out infinite;
    border-radius: 6px;
    color: transparent !important;
    user-select: none;
    pointer-events: none;
}
.skeleton-text {
    height: 14px;
    margin-bottom: 8px;
    border-radius: 6px;
}
.skeleton-text:last-child { width: 70%; }
.skeleton-title {
    height: 20px;
    width: 60%;
    margin-bottom: 12px;
    border-radius: 6px;
}
.skeleton-image {
    aspect-ratio: 16/10;
    border-radius: 8px;
    width: 100%;
}
.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}
.skeleton-card {
    padding: 20px;
    border-radius: 12px;
    border: 1px solid #e8ecf3;
}
.skeleton-card .skeleton-title { margin-top: 12px; }
.skeleton-img-wrapper {
    position: relative;
    overflow: hidden;
    background: #e8ecf3;
}
.skeleton-img-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent 25%, rgba(255,255,255,0.5) 37%, transparent 63%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.6s ease-in-out infinite;
    z-index: 1;
}
.skeleton-img-wrapper img {
    position: relative;
    z-index: 0;
    opacity: 0;
    transition: opacity 0.4s ease;
}
.skeleton-img-wrapper.loaded::before { display: none; }
.skeleton-img-wrapper.loaded img { opacity: 1; }

/* Ripple Click Effect */
.ripple, .btn, .btn-primary, .btn-outline, .btn-lg, button[type="submit"] {
    position: relative;
    overflow: hidden;
}
.ripple-effect {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.35);
    transform: scale(0);
    animation: ripple-anim 0.6s ease-out;
    pointer-events: none;
    z-index: 0;
}
@keyframes ripple-anim {
    to { transform: scale(1); opacity: 0; }
}

/* Image Fade-in Loading */
img[loading="lazy"].img-init:not(.img-loaded),
.fade-in-img:not(.img-loaded) {
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
img[loading="lazy"].img-loaded,
.fade-in-img.img-loaded {
    opacity: 1;
    transform: translateY(0);
}

/* 浮动动画 */
.float {
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.float-delay-1 { animation-delay: 0.5s; }
.float-delay-2 { animation-delay: 1s; }
.float-delay-3 { animation-delay: 1.5s; }

/* 渐变边框 */
.gradient-border {
    position: relative;
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: -2px;
    background: linear-gradient(45deg, #3D7CFF, #5B94FF, #7AABFF, #3D7CFF);
    background-size: 400% 400%;
    border-radius: calc(var(--radius-md) + 2px);
    z-index: -1;
    animation: gradientRotate 3s ease infinite;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.gradient-border:hover::before {
    opacity: 1;
}

@keyframes gradientRotate {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 光泽效果 */
.shine {
    position: relative;
    overflow: hidden;
}

.shine::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(to right, transparent 0%, rgba(255,255,255,0.1) 50%, transparent 100%);
    transform: rotate(30deg) translateX(-100%);
    transition: transform 0.6s ease;
}

.shine:hover::after {
    transform: rotate(30deg) translateX(100%);
}

/* 图片缩放 */
.img-zoom {
    overflow: hidden;
}

.img-zoom img {
    transition: transform 0.5s ease;
}

.img-zoom:hover img {
    transform: scale(1.1);
}

/* 3D卡片效果 */
.card-3d {
    transform-style: preserve-3d;
    transition: transform 0.5s ease;
}

.card-3d:hover {
    transform: perspective(1000px) rotateX(5deg) rotateY(-5deg) translateZ(20px);
}

/* 发光点 */
.glow-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--color-accent), 0 0 20px var(--color-accent), 0 0 30px var(--color-accent);
    animation: glowDot 2s ease-in-out infinite;
}

@keyframes glowDot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

/* 磁性按钮 */
.magnetic {
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 科技图案背景 */
.tech-pattern {
    position: relative;
}

.tech-pattern::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(61,124,255,0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(61,124,255,0.03) 0%, transparent 50%);
    pointer-events: none;
}

/* 筛选条 */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
}
.filter-item {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 20px;
    background: #fff;
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 14px;
}
.filter-item:hover { border-color: var(--color-accent); color: var(--color-accent); }
.filter-item.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

/* 新闻列表 - 科技感卡片 */
.news-list { display: flex; flex-direction: column; gap: var(--space-lg); }
.news-item {
    display: flex;
    gap: var(--space-lg);
    background: #fff;
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.news-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), #5B94FF, var(--color-accent));
    background-size: 200% auto;
    opacity: 0;
    transition: opacity 0.3s ease;
    animation: borderGlow 2s linear infinite;
}

@keyframes borderGlow {
    from { background-position: 0% center; }
    to { background-position: 200% center; }
}

.news-item:hover::before {
    opacity: 1;
}

.news-item:hover {
    box-shadow: 0 8px 30px rgba(61,124,255,0.12), 0 0 0 1px rgba(61,124,255,0.08);
    transform: translateY(-4px);
}
.news-thumb { flex: 0 0 160px; border-radius: var(--radius-sm); overflow: hidden; }
.news-thumb img { width: 160px; height: 100px; object-fit: cover; }
.news-content { flex: 1; min-width: 0; }
.news-meta { font-size: 13px; color: var(--color-text-muted); margin-bottom: var(--space-sm); }
.news-category { color: var(--color-accent); margin-right: var(--space-md); }
.news-title { margin: 0 0 var(--space-sm); font-size: 18px; font-weight: 600; line-height: 1.35; }
/* 列表项整卡为 <a> 时标题颜色 */
a.news-item.news-item-link { text-decoration: none; color: inherit; }
a.news-item.news-item-link .news-title { color: var(--color-text-primary); }
a.news-item.news-item-link:hover .news-title { color: var(--color-accent); }
.news-excerpt { margin: 0; font-size: 14px; color: var(--color-text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
@media (max-width: 600px) {
    .news-item { flex-direction: column; }
    .news-thumb { flex: none; }
    .news-thumb img { width: 100%; height: auto; min-height: 140px; }
}

/* 案例列表 */
.cases-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
@media (max-width: 768px) { .cases-grid { grid-template-columns: 1fr; } }
.case-item .case-link { display: block; color: inherit; }
/* 案例图片 - 科技感 */
.case-image {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    transition: all 0.3s ease;
}

.case-item:hover .case-image {
    box-shadow: 0 12px 40px rgba(0,0,0,0.15), 0 0 0 1px rgba(61,124,255,0.1);
}

.case-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border: 1px solid rgba(61,124,255,0);
    border-radius: var(--radius-md);
    transition: border-color 0.3s ease;
    pointer-events: none;
}

.case-item:hover .case-image::after {
    border-color: rgba(61,124,255,0.3);
}
.case-image img, .case-image .case-image-placeholder { width: 100%; height: 100%; object-fit: cover; }
.case-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(26, 29, 41, 0.92) 0%, rgba(26, 29, 41, 0.25) 55%, transparent 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-lg);
}
.case-title { font-size: 17px; font-weight: 600; color: #fff; margin: 0 0 var(--space-xs); }
.case-desc { font-size: 13px; color: rgba(255, 255, 255, 0.85); margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* 分页 */
.pagination { margin-top: var(--space-xl); text-align: center; }
.pagination ul { display: inline-flex; flex-wrap: wrap; gap: var(--space-sm); list-style: none; padding: 0; margin: 0; justify-content: center; }
.pagination li { display: inline-block; }
.pagination a, .pagination span {
    display: inline-block;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: #fff;
    color: var(--color-text-secondary);
    font-size: 14px;
}
.pagination .active span, .pagination .active a {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

/* 面包屑 */
.breadcrumb { font-size: 14px; color: var(--color-text-muted); margin-bottom: var(--space-lg); }
.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb span { margin: 0 6px; }

/* 文章页 */
.article-page .article-header { margin-bottom: var(--space-xl); }
.article-title { font-size: 28px; font-weight: 600; margin: 0 0 var(--space-md); line-height: 1.3; }
.article-meta { font-size: 14px; color: var(--color-text-muted); }
.article-category { color: var(--color-accent); margin-right: var(--space-md); }
.article-source { margin-left: var(--space-md); }
.article-cover {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-xl);
}
.article-content {
    background: #fff;
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text-primary);
}
.article-content img { max-width: 100%; height: auto; }
.article-footer { margin-top: var(--space-xl); }
.article-tags { margin-bottom: var(--space-lg); }
.article-tags .tag {
    display: inline-block;
    padding: 4px 10px;
    margin: 0 var(--space-sm) var(--space-sm) 0;
    background: rgba(61, 124, 255, 0.08);
    color: var(--color-accent);
    border-radius: 20px;
    font-size: 13px;
}
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}
@media (max-width: 600px) { .article-nav { grid-template-columns: 1fr; } }
.article-nav-prev, .article-nav-next {
    display: block;
    padding: var(--space-md);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: inherit;
}
.article-nav-next { text-align: right; }
.article-nav-prev span, .article-nav-next span { display: block; font-size: 12px; color: var(--color-text-muted); margin-bottom: 4px; }
.article-nav-prev strong, .article-nav-next strong { font-size: 14px; color: var(--color-text-primary); font-weight: 600; }
.article-actions { display: flex; flex-wrap: wrap; gap: var(--space-md); }

/* 案例详情 */
.case-detail-page .case-detail-hero { position: relative; border-radius: var(--radius-md); overflow: hidden; margin-bottom: var(--space-xl); }
.case-detail-cover { width: 100%; max-height: 360px; object-fit: cover; min-height: 200px; }
.case-detail-hero-content {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: var(--space-xl);
    background: linear-gradient(to top, rgba(26, 29, 41, 0.9), transparent);
    color: #fff;
}
.case-detail-title { margin: 0; font-size: 26px; font-weight: 600; }
.case-detail-body {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--space-xl);
    align-items: start;
}
@media (max-width: 991px) { .case-detail-body { grid-template-columns: 1fr; } }
.case-detail-content {
    background: #fff;
    padding: var(--space-xl);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    line-height: 1.8;
}
.case-detail-tech { margin-top: var(--space-xl); }
.case-detail-tech h3 { font-size: 16px; margin: 0 0 var(--space-md); }
.tech-tags { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.tech-tag {
    padding: 6px 12px;
    background: var(--color-bg-page);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
}
.case-detail-sidebar .info-card, .case-cta-card {
    background: #fff;
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--space-lg);
}
.case-detail-sidebar h3 { margin: 0 0 var(--space-md); font-size: 16px; }
.case-cta-card p { margin: 0 0 var(--space-md); color: var(--color-text-secondary); font-size: 14px; }
.case-detail-footer { margin-top: var(--space-xl); }

/* 关于我们 */
.about-page .about-section { margin-bottom: var(--space-3xl); }
.about-page .about-section h2 { font-size: 22px; margin: 0 0 var(--space-lg); }
.about-intro p { color: var(--color-text-secondary); margin: 0 0 var(--space-md); }
.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}
@media (max-width: 768px) { .about-stats { grid-template-columns: repeat(2, 1fr); } }
.stat-item { text-align: center; padding: var(--space-lg); background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.stat-number { display: block; font-size: 28px; font-weight: 600; color: var(--color-brand); }
.stat-label { font-size: 14px; color: var(--color-text-secondary); }
.values-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}
@media (max-width: 600px) { .values-grid { grid-template-columns: 1fr; } }
.value-card { background: #fff; padding: var(--space-xl); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.value-icon { width: 40px; height: 40px; color: var(--color-accent); margin-bottom: var(--space-md); }
.value-card h3 { margin: 0 0 var(--space-sm); font-size: 17px; }
.value-card p { margin: 0; font-size: 14px; color: var(--color-text-secondary); }
.timeline { border-left: 2px solid var(--color-border); margin-left: 12px; padding-left: var(--space-xl); }
.timeline-item { position: relative; margin-bottom: var(--space-xl); }
.timeline-year {
    position: absolute;
    left: calc(-1 * var(--space-xl) - 18px);
    top: 0;
    width: 56px;
    text-align: center;
    font-weight: 600;
    font-size: 14px;
    color: var(--color-accent);
    background: var(--color-bg-page);
}
.timeline-content h3 { margin: 0 0 var(--space-sm); font-size: 17px; }
.timeline-content p { margin: 0; color: var(--color-text-secondary); font-size: 14px; }
.about-cta { text-align: center; padding: var(--space-2xl); background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.about-cta p { color: var(--color-text-secondary); margin: 0 0 var(--space-lg); }

/* 联系表单 */
.contact-layout { display: grid; grid-template-columns: 1fr 340px; gap: var(--space-xl); align-items: start; }
@media (max-width: 991px) { .contact-layout { grid-template-columns: 1fr; } }
.contact-form-section h2 { margin: 0 0 var(--space-sm); font-size: 22px; }
.contact-form-section > p { margin: 0 0 var(--space-lg); color: var(--color-text-secondary); font-size: 14px; }
.form-group { margin-bottom: var(--space-md); }
.form-group label { display: block; font-size: 14px; margin-bottom: var(--space-xs); color: var(--color-text-secondary); }
.form-group .required { color: #dc2626; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 15px;
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }
.form-hint { font-size: 13px; color: var(--color-text-muted); margin-top: var(--space-xs); }
.contact-info-section .info-card { background: #fff; padding: var(--space-lg); border-radius: var(--radius-md); box-shadow: var(--shadow-sm); margin-bottom: var(--space-lg); }
.contact-info-section h3 { margin: 0 0 var(--space-md); font-size: 16px; }
.contact-info-section .info-item { display: flex; gap: var(--space-md); margin-bottom: var(--space-lg); align-items: flex-start; }
.contact-info-section .info-item:last-child { margin-bottom: 0; }
.info-icon { width: 40px; height: 40px; color: var(--color-accent); flex-shrink: 0; }
.info-icon svg { width: 100%; height: 100%; }
.info-content { display: flex; flex-direction: column; gap: 4px; }
.info-label { font-size: 12px; color: var(--color-text-muted); }
.info-value { font-size: 14px; color: var(--color-text-primary); }
.social-links { display: flex; gap: var(--space-md); }
.social-link { color: var(--color-text-secondary); }
.social-link:hover { color: var(--color-accent); }
.social-link svg { width: 28px; height: 28px; }

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: none;
    transition: background 0.2s ease, transform 0.2s ease;
}
/* 科技感按钮 */
.btn-primary {
    background: linear-gradient(135deg, var(--color-accent) 0%, #5B94FF 100%);
    color: #fff !important;
    box-shadow: 0 4px 15px rgba(61,124,255,0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-hover) 0%, #7AABFF 100%);
    color: #fff !important;
    box-shadow: 0 6px 20px rgba(61,124,255,0.4), 0 0 30px rgba(61,124,255,0.2);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--color-brand) !important;
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent) !important;
    box-shadow: 0 0 20px rgba(61,124,255,0.2);
}
.btn-lg { padding: 14px 28px; }

/* 空状态 */
.empty-state { text-align: center; padding: var(--space-3xl) 0; color: var(--color-text-muted); }
.empty-state .btn { margin-top: var(--space-lg); }

/* 页脚 */
.site-footer {
    background: linear-gradient(180deg, #fff 0%, var(--color-bg-page) 100%);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0 var(--space-xl);
    margin-top: var(--space-2xl);
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}
@media (max-width: 991px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col--brand { display: flex; flex-direction: column; gap: var(--space-md); }
.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-brand);
}
.footer-logo svg { flex-shrink: 0; }
.footer-desc { font-size: 14px; color: var(--color-text-secondary); line-height: 1.7; margin: 0; }
.footer-heading { font-size: 15px; font-weight: 600; color: var(--color-text-primary); margin: 0 0 var(--space-md); }
.footer-nav { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: var(--space-sm); }
.footer-nav a { font-size: 14px; color: var(--color-text-secondary); }
.footer-nav a:hover { color: var(--color-accent); }
.footer-contact { list-style: none; margin: 0; padding: 0; }
.footer-contact li { display: flex; align-items: flex-start; gap: var(--space-sm); margin-bottom: var(--space-sm); font-size: 13px; color: var(--color-text-secondary); }
.footer-contact li svg { color: var(--color-accent); flex-shrink: 0; margin-top: 2px; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}
.footer-copyright { font-size: 14px; color: var(--color-text-secondary); }
.footer-bottom-links { display: flex; gap: var(--space-lg); }
.footer-bottom-links a { font-size: 14px; color: var(--color-text-secondary); }
.footer-bottom-links a:hover { color: var(--color-accent); }
.footer-links { display: flex; gap: var(--space-lg); }
.footer-link { font-size: 14px; color: var(--color-text-secondary); }
.footer-link:hover { color: var(--color-accent); }

@media (prefers-reduced-motion: reduce) {
    * { transition-duration: 0.01ms !important; }
}

/* ========== 服务页 ========== */
.service-intro { text-align: center; max-width: 720px; margin: 0 auto var(--space-3xl); }
.service-intro h2 { font-size: 22px; margin: 0 0 var(--space-md); }
.service-intro p { color: var(--color-text-secondary); font-size: 15px; line-height: 1.7; }

/* 服务流程 */
.service-process { margin-bottom: var(--space-3xl); text-align: center; }
.service-process > h2 { margin-bottom: var(--space-xl); }
.process-flow { display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: center; gap: 0; position: relative; }
.process-step { flex: 1 1 0; min-width: 160px; max-width: 200px; padding: var(--space-lg) var(--space-md); text-align: center; position: relative; z-index: 1; }
.process-step-number { font-size: 11px; font-weight: 700; color: var(--color-accent); letter-spacing: 0.05em; margin-bottom: var(--space-sm); }
.process-step-icon { width: 48px; height: 48px; margin: 0 auto var(--space-md); background: rgba(61,124,255,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--color-accent); transition: all 0.3s ease; }
.process-step-icon svg { width: 24px; height: 24px; }
.process-step:hover .process-step-icon { background: var(--color-accent); color: #fff; transform: scale(1.1); box-shadow: 0 0 20px rgba(61,124,255,0.3); }
.process-step h3 { font-size: 15px; font-weight: 600; margin: 0 0 var(--space-sm); }
.process-step p { font-size: 13px; color: var(--color-text-secondary); line-height: 1.5; margin: 0; }
.process-connector { width: 40px; height: 2px; background: var(--color-border); align-self: center; flex-shrink: 0; margin-top: -60px; display: none; }
@media (min-width: 769px) { .process-connector { display: block; } }
@media (max-width: 768px) { .process-flow { flex-direction: column; align-items: center; } .process-step { max-width: 100%; } }

/* 服务详情卡片 */
.service-detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
@media (max-width: 991px) { .service-detail-grid { grid-template-columns: 1fr; } }
.service-detail-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}
.service-detail-card:hover { box-shadow: 0 12px 40px rgba(0,0,0,0.1), 0 0 0 1px rgba(61,124,255,0.08); transform: translateY(-4px); }
.service-detail-icon { width: 48px; height: 48px; background: rgba(61,124,255,0.1); border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; color: var(--color-accent); margin-bottom: var(--space-md); }
.service-detail-icon svg { width: 24px; height: 24px; }
.service-detail-card h3 { font-size: 18px; font-weight: 600; margin: 0 0 var(--space-sm); }
.service-detail-card > p { font-size: 14px; color: var(--color-text-secondary); line-height: 1.6; margin: 0 0 var(--space-md); flex: 1; }
.service-feature-list { list-style: none; margin: 0 0 var(--space-lg); padding: 0; width: 100%; }
.service-feature-list li { font-size: 13px; color: var(--color-text-secondary); padding: var(--space-xs) 0; display: flex; align-items: center; gap: var(--space-sm); }
.service-feature-list li::before { content: ''; width: 6px; height: 6px; background: var(--color-accent); border-radius: 50%; flex-shrink: 0; }

/* 服务详情文章 */
.service-article { background: #fff; border-radius: var(--radius-md); padding: var(--space-xl); box-shadow: var(--shadow-sm); }
.service-article > h2 { font-size: 24px; margin: 0 0 var(--space-lg); }
.service-article h3 { font-size: 17px; margin: var(--space-xl) 0 var(--space-md); }
.service-article h3:first-child { margin-top: 0; }
.service-article p { color: var(--color-text-secondary); line-height: 1.7; }
.service-article ul { color: var(--color-text-secondary); }
.service-article ul li { margin-bottom: var(--space-sm); }
.service-body { display: grid; grid-template-columns: 1fr 280px; gap: var(--space-xl); align-items: start; }
@media (max-width: 768px) { .service-body { grid-template-columns: 1fr; } }
.service-body-sidebar .info-card { background: var(--color-bg-page); padding: var(--space-lg); border-radius: var(--radius-md); }
.service-body-sidebar .info-card h3 { margin: 0 0 var(--space-md); font-size: 16px; }
.service-body-sidebar .info-card ul { list-style: none; padding: 0; margin: 0; }
.service-body-sidebar .info-card ul li { padding: var(--space-sm) 0; font-size: 14px; color: var(--color-text-secondary); border-bottom: 1px solid var(--color-border); }
.service-body-sidebar .info-card ul li:last-child { border-bottom: none; }
.service-section > h2 { font-size: 22px; margin: 0 0 var(--space-lg); text-align: center; }

/* =====================================================
   🚀 子页面 v2 增强层：与首页设计系统对齐
   · 响应式平铺容器 / 流体字号 / 科技感渐变 / 交互升级
   ===================================================== */

:root {
    /* 流体字号 */
    --fs-xs:   clamp(11px, 0.72vw + 0.4rem, 13px);
    --fs-sm:   clamp(12px, 0.8vw + 0.4rem, 14px);
    --fs-base: clamp(14px, 0.9vw + 0.4rem, 16px);
    --fs-md:   clamp(15px, 1vw + 0.4rem, 18px);
    --fs-lg:   clamp(17px, 1.2vw + 0.4rem, 20px);
    --fs-xl:   clamp(20px, 1.6vw + 0.4rem, 26px);
    --fs-2xl:  clamp(24px, 2vw + 0.4rem, 34px);
    --fs-3xl:  clamp(28px, 2.6vw + 0.4rem, 44px);
    --fs-hero: clamp(28px, 3.6vw, 52px);

    --color-tech-cyan: #00E5FF;
    --color-tech-glow: rgba(61,124,255,0.45);
    --grad-tech: linear-gradient(135deg, #3D7CFF 0%, #5B94FF 50%, #00E5FF 100%);
    --grad-tech-soft: linear-gradient(135deg, rgba(61,124,255,0.08), rgba(0,229,255,0.08));

    --radius-lg: 12px;
    --shadow-lg: 0 20px 50px -20px rgba(61,124,255,0.25), 0 8px 24px rgba(0,0,0,0.06);
}

/* 基础：流体字号 + 平滑渲染 */
body.site-subpage {
    font-size: var(--fs-base);
    min-width: 320px;
    overflow-x: hidden;
    text-rendering: optimizeLegibility;
    -webkit-tap-highlight-color: transparent;
}
::selection { background: rgba(61,124,255,0.25); color: #1A1D29; }
a:focus-visible, button:focus-visible, .btn:focus-visible, .nav-link:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 4px;
}

/* 响应式平铺容器 */
.w1200 {
    width: 100%;
    max-width: 1600px !important;
    margin-left: auto;
    margin-right: auto;
    padding-left: clamp(16px, 4vw, 64px) !important;
    padding-right: clamp(16px, 4vw, 64px) !important;
}
@media (min-width: 1680px) { .w1200 { max-width: 1720px !important; } }
@media (min-width: 1920px) { .w1200 { max-width: 1800px !important; } }

/* 自定义滚动条 */
html { scrollbar-color: #3D7CFF rgba(0,0,0,0.05); scrollbar-width: thin; }
body.site-subpage::-webkit-scrollbar { width: 10px; height: 10px; }
body.site-subpage::-webkit-scrollbar-track { background: rgba(0,0,0,0.04); }
body.site-subpage::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #3D7CFF, #00E5FF);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

/* 顶部滚动进度条 & 返回顶部 */
.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px; width: 0;
    background: var(--grad-tech);
    box-shadow: 0 0 10px var(--color-tech-glow);
    z-index: 9999;
    transition: width 0.1s linear;
    pointer-events: none;
}
.back-to-top {
    position: fixed;
    right: clamp(16px, 2vw, 32px);
    bottom: clamp(16px, 2vw, 32px);
    width: 48px; height: 48px;
    border-radius: 50%;
    background: rgba(26,29,41,0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: #fff;
    border: 1px solid rgba(61,124,255,0.3);
    display: flex; align-items: center; justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
    z-index: 999;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover {
    background: var(--color-accent);
    box-shadow: 0 8px 30px var(--color-tech-glow);
    transform: translateY(-4px) scale(1.05);
    border-color: transparent;
}
.back-to-top svg { width: 20px; height: 20px; }

/* ---------- Header 升级 ---------- */
.site-header {
    transition: all 0.35s cubic-bezier(.4,0,.2,1);
    background: rgba(255,255,255,0.85) !important;
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid rgba(230,232,236,0.6);
}
.nav-logo { font-size: var(--fs-lg) !important; letter-spacing: -0.01em; }
.nav-logo svg { filter: drop-shadow(0 0 8px rgba(61,124,255,0.3)); }
.nav-link { font-size: var(--fs-base) !important; }
.nav-link:not(.nav-cta) { position: relative; }
.nav-link:not(.nav-cta)::after {
    content: '';
    position: absolute;
    left: 50%; bottom: 0;
    transform: translateX(-50%);
    width: 0; height: 2px;
    background: var(--grad-tech);
    box-shadow: 0 0 8px var(--color-tech-glow);
    border-radius: 2px;
    transition: width 0.3s cubic-bezier(.2,.7,.2,1);
}
.nav-link:not(.nav-cta):hover::after,
.nav-link.active:not(.nav-cta)::after { width: 100%; }
.nav-link.active::after { display: none; }
.nav-cta { background: var(--grad-tech) !important; font-size: var(--fs-sm) !important; }

/* ---------- Page Header 升级 ---------- */
.page-header {
    padding: clamp(48px, 6vw, 96px) 0 clamp(40px, 4vw, 64px);
    margin-bottom: clamp(24px, 3vw, 48px);
    background:
        radial-gradient(800px 400px at 20% 0%, rgba(61,124,255,0.25), transparent 60%),
        radial-gradient(800px 400px at 80% 100%, rgba(0,229,255,0.2), transparent 60%),
        linear-gradient(135deg, #1a1d29 0%, #2d3548 100%);
}
.page-header h1 {
    font-size: var(--fs-3xl) !important;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fff 0%, #C5D4FF 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.page-header p {
    font-size: var(--fs-md) !important;
    opacity: 0.75;
    max-width: 720px;
}
/* 顶部装饰小点阵 */
.page-header::after {
    width: clamp(200px, 30vw, 420px);
    height: clamp(200px, 30vw, 420px);
}

/* 主页内容区 padding 调整 */
.page-content { padding-bottom: clamp(48px, 6vw, 96px); }

/* ---------- 筛选条升级 ---------- */
.filter-bar { gap: 10px; margin-bottom: clamp(20px, 2vw, 32px); }
.filter-item {
    font-size: var(--fs-sm);
    padding: 8px 18px;
    border-radius: 999px;
    transition: all 0.3s cubic-bezier(.2,.7,.2,1);
    background: #fff;
}
.filter-item:hover {
    transform: translateY(-1px);
    border-color: rgba(61,124,255,0.4);
    box-shadow: 0 6px 16px -6px rgba(61,124,255,0.25);
}
.filter-item.active {
    background: var(--grad-tech);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 8px 20px -6px var(--color-tech-glow);
}

/* ---------- 新闻列表（横向卡）---------- */
.news-list { gap: clamp(14px, 1.4vw, 20px); }
.news-item {
    padding: clamp(16px, 1.4vw, 24px);
    gap: clamp(16px, 1.6vw, 28px);
    border: 1px solid var(--color-border);
    border-radius: clamp(10px, 1vw, 16px);
    align-items: stretch;
}
.news-item:hover {
    transform: translateY(-4px);
    border-color: transparent;
    box-shadow: var(--shadow-lg);
}
.news-thumb {
    flex: 0 0 clamp(160px, 18vw, 240px);
    border-radius: clamp(8px, 0.8vw, 12px);
    overflow: hidden;
    position: relative;
}
.news-thumb img {
    width: 100% !important;
    height: 100% !important;
    min-height: 120px;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(.2,.7,.2,1);
}
.news-item:hover .news-thumb img { transform: scale(1.05); }
.news-content { display: flex; flex-direction: column; justify-content: center; }
.news-meta { font-size: var(--fs-xs); display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.news-category {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 3px 10px;
    background: var(--grad-tech-soft);
    border: 1px solid rgba(61,124,255,0.2);
    color: var(--color-accent) !important;
    border-radius: 999px;
    font-weight: 500;
    margin-right: 0 !important;
}
.news-category::before {
    content: '';
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--color-accent);
    box-shadow: 0 0 6px var(--color-accent);
}
.news-date { display: inline-flex; align-items: center; gap: 6px; color: var(--color-text-muted); }
.news-title { font-size: var(--fs-lg) !important; font-weight: 600; line-height: 1.4; letter-spacing: -0.01em; }
.news-excerpt { font-size: var(--fs-sm) !important; }

@media (max-width: 640px) {
    .news-item { flex-direction: column; padding: 14px; }
    .news-thumb { flex: none; width: 100%; }
    .news-thumb img { height: auto !important; aspect-ratio: 16 / 9; }
}

/* ---------- 案例列表升级 ---------- */
.cases-grid {
    grid-template-columns: repeat(auto-fill, minmax(clamp(280px, 24vw, 420px), 1fr)) !important;
    gap: clamp(16px, 1.6vw, 24px);
}
.case-item .case-image { border-radius: clamp(12px, 1.2vw, 18px); border: 1px solid var(--color-border); }
.case-item:hover .case-image {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.case-image img, .case-image .case-image-placeholder { transition: transform 0.8s cubic-bezier(.2,.7,.2,1); }
.case-item:hover .case-image img { transform: scale(1.08); }
.case-overlay {
    padding: clamp(16px, 1.6vw, 28px);
    background: linear-gradient(to top, rgba(26,29,41,0.92) 0%, rgba(26,29,41,0.3) 50%, transparent 100%);
}
.case-title { font-size: var(--fs-md) !important; font-weight: 700; letter-spacing: -0.01em; }
.case-desc { font-size: var(--fs-xs) !important; }

/* ---------- 分页升级 ---------- */
.pagination { margin-top: clamp(24px, 3vw, 40px); }
.pagination a, .pagination span {
    min-width: 38px;
    text-align: center;
    font-size: var(--fs-sm);
    padding: 8px 14px;
    border-radius: 8px;
    transition: all 0.25s ease;
}
.pagination a:hover {
    color: var(--color-accent);
    border-color: rgba(61,124,255,0.35);
    transform: translateY(-1px);
    box-shadow: 0 6px 14px -6px rgba(61,124,255,0.25);
}
.pagination .active span, .pagination .active a {
    background: var(--grad-tech);
    border-color: transparent;
    box-shadow: 0 8px 20px -6px var(--color-tech-glow);
}

/* ---------- 面包屑 ---------- */
.breadcrumb { font-size: var(--fs-sm); }

/* ---------- 文章页升级 ---------- */
.article-title {
    font-size: var(--fs-3xl) !important;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.25;
}
.article-meta { font-size: var(--fs-sm) !important; display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.article-category {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 4px 10px;
    background: var(--grad-tech-soft);
    border: 1px solid rgba(61,124,255,0.2);
    color: var(--color-accent) !important;
    border-radius: 999px;
    margin-right: 0 !important;
}
.article-cover {
    max-height: clamp(280px, 40vw, 520px);
    border-radius: clamp(10px, 1vw, 16px);
    box-shadow: var(--shadow-md);
}
.article-content {
    padding: clamp(20px, 2.4vw, 40px) !important;
    border-radius: clamp(10px, 1vw, 16px);
    font-size: var(--fs-md);
    line-height: 1.85;
    border: 1px solid var(--color-border);
}
.article-content h2 { font-size: var(--fs-xl); margin-top: 1.6em; }
.article-content h3 { font-size: var(--fs-lg); margin-top: 1.4em; }
.article-content p { margin: 0.8em 0; }
.article-content img { border-radius: 8px; margin: 1em 0; }
.article-content blockquote {
    margin: 1em 0;
    padding: 12px 20px;
    border-left: 3px solid var(--color-accent);
    background: var(--grad-tech-soft);
    border-radius: 0 8px 8px 0;
    color: var(--color-text-secondary);
}
.article-content pre {
    background: #1a1d29;
    color: #e6e8ec;
    padding: 16px 20px;
    border-radius: 10px;
    overflow-x: auto;
    font-size: var(--fs-sm);
}
.article-content code {
    background: var(--grad-tech-soft);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
}
.article-content pre code { background: transparent; padding: 0; }

.article-tags .tag {
    font-size: var(--fs-xs);
    padding: 5px 12px;
    background: var(--grad-tech-soft);
    border: 1px solid rgba(61,124,255,0.2);
    transition: all 0.25s ease;
}
.article-tags .tag:hover {
    background: var(--grad-tech);
    color: #fff;
    border-color: transparent;
    transform: translateY(-1px);
}

.article-nav-prev, .article-nav-next {
    padding: clamp(14px, 1.4vw, 20px) !important;
    border-radius: clamp(10px, 1vw, 14px);
    transition: all 0.3s cubic-bezier(.2,.7,.2,1);
    position: relative;
    overflow: hidden;
}
.article-nav-prev::before, .article-nav-next::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--grad-tech-soft);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}
.article-nav-prev:hover, .article-nav-next:hover {
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}
.article-nav-prev:hover::before, .article-nav-next:hover::before { opacity: 1; }
.article-nav-prev > *, .article-nav-next > * { position: relative; z-index: 1; }
.article-nav-prev span, .article-nav-next span { font-size: var(--fs-xs); color: var(--color-accent); font-weight: 500; }
.article-nav-prev strong, .article-nav-next strong { font-size: var(--fs-base); }

/* ---------- 案例详情 ---------- */
.case-detail-title { font-size: var(--fs-3xl) !important; font-weight: 700; letter-spacing: -0.01em; }
.case-detail-page .case-detail-hero { border-radius: clamp(12px, 1.2vw, 18px); margin-bottom: 0; }
.case-detail-cover { max-height: clamp(260px, 36vw, 480px); }
.case-detail-body { grid-template-columns: 1fr clamp(280px, 22vw, 340px); gap: clamp(20px, 2vw, 40px); }
.case-detail-content {
    padding: clamp(20px, 2.4vw, 40px) !important;
    border-radius: clamp(10px, 1vw, 16px);
    font-size: var(--fs-md);
    line-height: 1.85;
    border: 1px solid var(--color-border);
}
.case-detail-tech h3 { font-size: var(--fs-md); margin-bottom: 12px; }
.tech-tag {
    font-size: var(--fs-xs);
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--grad-tech-soft);
    border-color: rgba(61,124,255,0.2);
    transition: all 0.25s ease;
}
.tech-tag:hover {
    background: var(--grad-tech);
    color: #fff;
    border-color: transparent;
    transform: translateY(-1px);
}
.case-detail-sidebar .info-card, .case-cta-card {
    padding: clamp(18px, 1.6vw, 24px) !important;
    border-radius: clamp(10px, 1vw, 14px);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}
.case-detail-sidebar .info-card:hover,
.case-cta-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.case-detail-sidebar h3 { font-size: var(--fs-md) !important; }
.case-cta-card {
    background:
        radial-gradient(400px 200px at 0 0, rgba(61,124,255,0.08), transparent 60%),
        #fff !important;
}
.case-cta-card p { font-size: var(--fs-sm) !important; }

/* 案例头部叠加 */
.case-detail-hero-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    padding: clamp(32px, 4vw, 60px) clamp(24px, 2.4vw, 40px);
    background: linear-gradient(transparent, rgba(0,0,0,0.65));
}
.case-detail-summary {
    margin: 12px 0 0;
    font-size: var(--fs-md);
    color: rgba(255,255,255,0.88);
    max-width: 720px;
    line-height: 1.6;
}
.case-detail-cover--placeholder {
    background: linear-gradient(135deg, #1a1d29 0%, #3d7cff 100%);
    min-height: clamp(200px, 28vw, 360px);
}

/* 项目快照条 */
.case-snapshot {
    display: flex;
    flex-wrap: wrap;
    gap: clamp(16px, 2vw, 32px);
    padding: clamp(16px, 1.6vw, 24px) clamp(20px, 2vw, 32px);
    margin: -1px 0 var(--space-xl);
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: 0 0 clamp(10px, 1vw, 14px) clamp(10px, 1vw, 14px);
}
.snapshot-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.snapshot-label {
    font-size: 12px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.snapshot-value {
    font-size: var(--fs-sm);
    color: var(--color-text-primary);
    font-weight: 600;
}

/* 侧边栏卡片 */
.case-sidebar-card {
    padding: clamp(18px, 1.6vw, 24px) !important;
    border-radius: clamp(10px, 1vw, 14px);
    border: 1px solid var(--color-border);
    background: #fff;
    margin-bottom: 16px;
    transition: all 0.3s ease;
}
.case-sidebar-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.case-sidebar-card h3 { font-size: var(--fs-md) !important; margin: 0 0 12px; }
.case-meta-list { list-style: none; margin: 0; padding: 0; }
.case-meta-list li {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    font-size: var(--fs-sm);
}
.case-meta-list li:last-child { border-bottom: none; }
.meta-label { color: var(--color-text-muted); flex-shrink: 0; }
.meta-value { color: var(--color-text-primary); font-weight: 500; text-align: right; }

/* 相关案例 */
.case-related { margin-top: var(--space-2xl); }
.case-related h2 {
    font-size: var(--fs-xl);
    margin: 0 0 var(--space-lg);
    font-weight: 600;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(240px, 20vw, 320px), 1fr));
    gap: clamp(14px, 1.4vw, 20px);
}
.related-card {
    display: block;
    border-radius: clamp(8px, 0.8vw, 12px);
    overflow: hidden;
    border: 1px solid var(--color-border);
    background: #fff;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}
.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.related-card-img {
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--color-bg-secondary, #eef0f4);
}
.related-card-img img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.related-card:hover .related-card-img img { transform: scale(1.05); }
.related-card-placeholder {
    width: 100%; height: 100%;
    background: linear-gradient(135deg, #e8edf5 0%, #d4dff7 100%);
}
.related-card-body {
    padding: clamp(12px, 1.2vw, 18px);
}
.related-card-body h4 {
    margin: 0 0 4px;
    font-size: var(--fs-sm);
    font-weight: 600;
    line-height: 1.4;
}
.related-card-body p {
    margin: 0;
    font-size: var(--fs-xs);
    color: var(--color-text-muted);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
@media (max-width: 600px) {
    .related-grid { grid-template-columns: 1fr; }
    .case-snapshot { flex-direction: column; gap: 12px; }
}

/* ---------- 关于我们 ---------- */
.about-page .about-section { margin-bottom: clamp(40px, 4vw, 72px); }
.about-page .about-section h2 {
    font-size: var(--fs-2xl) !important;
    font-weight: 600;
    letter-spacing: -0.01em;
    position: relative;
    padding-bottom: 6px;
    display: inline-block;
}
.about-page .about-section h2::after {
    content: '';
    position: absolute;
    left: 0; bottom: -6px;
    width: 48px; height: 3px;
    background: var(--grad-tech);
    border-radius: 3px;
    box-shadow: 0 0 12px var(--color-tech-glow);
}
.about-intro p { font-size: var(--fs-md); }
.about-stats {
    grid-template-columns: repeat(auto-fit, minmax(clamp(160px, 18vw, 240px), 1fr)) !important;
    gap: clamp(14px, 1.4vw, 24px);
}
.stat-item {
    padding: clamp(20px, 2vw, 32px) !important;
    border-radius: clamp(10px, 1vw, 14px);
    border: 1px solid var(--color-border);
    transition: all 0.3s cubic-bezier(.2,.7,.2,1);
    position: relative;
    overflow: hidden;
}
.stat-item::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--grad-tech);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(.2,.7,.2,1);
}
.stat-item:hover { transform: translateY(-6px); border-color: transparent; box-shadow: var(--shadow-lg); }
.stat-item:hover::before { transform: scaleX(1); }
.stat-number {
    font-size: clamp(28px, 2.8vw, 44px) !important;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #1A1D29 0%, #3D7CFF 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.stat-label { font-size: var(--fs-sm) !important; margin-top: 4px; }

.values-grid {
    grid-template-columns: repeat(auto-fit, minmax(clamp(260px, 22vw, 360px), 1fr)) !important;
    gap: clamp(16px, 1.6vw, 24px);
}
.value-card {
    padding: clamp(20px, 2vw, 32px) !important;
    border-radius: clamp(10px, 1vw, 14px);
    border: 1px solid var(--color-border);
    transition: all 0.3s cubic-bezier(.2,.7,.2,1);
    position: relative;
    overflow: hidden;
}
.value-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--grad-tech);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(.2,.7,.2,1);
}
.value-card:hover { transform: translateY(-6px); border-color: transparent; box-shadow: var(--shadow-lg); }
.value-card:hover::before { transform: scaleX(1); }
.value-icon {
    width: clamp(44px, 3.4vw, 56px);
    height: clamp(44px, 3.4vw, 56px);
    background: var(--grad-tech-soft);
    border: 1px solid rgba(61,124,255,0.18);
    border-radius: 12px;
    padding: 10px;
    margin-bottom: clamp(12px, 1vw, 18px);
    transition: all 0.35s ease;
}
.value-card:hover .value-icon {
    background: var(--grad-tech);
    color: #fff;
    border-color: transparent;
    transform: rotate(-6deg) scale(1.05);
}
.value-card h3 { font-size: var(--fs-md) !important; font-weight: 600; }
.value-card p { font-size: var(--fs-sm) !important; }

.timeline {
    border-left-color: rgba(61,124,255,0.25);
    padding-left: clamp(20px, 2vw, 32px);
}
.timeline-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * clamp(20px, 2vw, 32px) - 7px);
    top: 6px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--grad-tech);
    box-shadow: 0 0 0 4px rgba(61,124,255,0.15), 0 0 12px var(--color-tech-glow);
}
.timeline-year {
    left: auto;
    position: static;
    display: inline-block;
    background: var(--grad-tech-soft);
    border: 1px solid rgba(61,124,255,0.2);
    padding: 4px 12px;
    border-radius: 999px;
    font-size: var(--fs-sm);
    margin-bottom: 8px;
    width: auto;
}
.timeline-content h3 { font-size: var(--fs-md) !important; }
.timeline-content p { font-size: var(--fs-sm) !important; }

.about-cta {
    padding: clamp(32px, 4vw, 64px) !important;
    border-radius: clamp(12px, 1.2vw, 18px);
    background:
        radial-gradient(600px 300px at 0 0, rgba(61,124,255,0.1), transparent 60%),
        radial-gradient(600px 300px at 100% 100%, rgba(0,229,255,0.08), transparent 60%),
        #fff !important;
    border: 1px solid var(--color-border);
}
.about-cta p { font-size: var(--fs-md); }

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: var(--fs-sm);
    margin: -12px 0 var(--space-xl);
}

/* 核心团队 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(240px, 20vw, 320px), 1fr));
    gap: clamp(16px, 1.6vw, 24px);
}
.team-card {
    text-align: center;
    padding: clamp(24px, 2.4vw, 40px) clamp(16px, 1.6vw, 24px);
    border-radius: clamp(10px, 1vw, 14px);
    border: 1px solid var(--color-border);
    background: #fff;
    transition: all 0.35s cubic-bezier(.2,.7,.2,1);
    position: relative;
    overflow: hidden;
}
.team-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--grad-tech);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(.2,.7,.2,1);
}
.team-card:hover { transform: translateY(-6px); border-color: transparent; box-shadow: var(--shadow-lg); }
.team-card:hover::before { transform: scaleX(1); }
.team-avatar {
    width: clamp(64px, 5vw, 80px);
    height: clamp(64px, 5vw, 80px);
    border-radius: 50%;
    background: var(--grad-tech-soft);
    border: 2px solid rgba(61,124,255,0.15);
    margin: 0 auto clamp(12px, 1vw, 16px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    transition: all 0.35s ease;
}
.team-card:hover .team-avatar {
    background: var(--grad-tech);
    color: #fff;
    border-color: transparent;
    transform: scale(1.08);
}
.team-card h3 { font-size: var(--fs-md); margin: 0 0 4px; font-weight: 600; }
.team-title {
    display: block;
    font-size: 13px;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 10px;
}
.team-card p {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* 资质认证 */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(clamp(140px, 14vw, 200px), 1fr));
    gap: clamp(12px, 1.2vw, 20px);
}
.cert-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: clamp(14px, 1.4vw, 20px) clamp(12px, 1.2vw, 18px);
    border-radius: clamp(8px, 0.8vw, 12px);
    border: 1px solid var(--color-border);
    background: #fff;
    font-size: var(--fs-sm);
    font-weight: 500;
    transition: all 0.3s ease;
}
.cert-item:hover {
    border-color: rgba(61,124,255,0.35);
    box-shadow: 0 4px 16px rgba(61,124,255,0.08);
    transform: translateY(-2px);
}
.cert-icon {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    color: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---------- 联系表单升级 ---------- */
.contact-layout {
    grid-template-columns: 1fr clamp(300px, 24vw, 380px) !important;
    gap: clamp(20px, 2vw, 40px);
}
.contact-form-section h2 { font-size: var(--fs-2xl) !important; font-weight: 600; }
.contact-form-section > p { font-size: var(--fs-md) !important; }
.form-group { margin-bottom: clamp(14px, 1.2vw, 18px); }
.form-group label { font-size: var(--fs-sm) !important; font-weight: 500; color: var(--color-text-primary); }
.form-group input, .form-group select, .form-group textarea {
    font-size: var(--fs-base) !important;
    padding: 12px 14px !important;
    border-radius: 10px;
    transition: all 0.25s ease;
    background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(61,124,255,0.12);
}
.contact-info-section .info-card {
    padding: clamp(18px, 1.6vw, 24px) !important;
    border-radius: clamp(10px, 1vw, 14px);
    border: 1px solid var(--color-border);
    transition: all 0.3s ease;
}
.contact-info-section .info-card:hover {
    transform: translateY(-2px);
    border-color: transparent;
    box-shadow: var(--shadow-lg);
}
.contact-info-section h3 { font-size: var(--fs-md) !important; }
.info-icon {
    width: clamp(40px, 3vw, 48px);
    height: clamp(40px, 3vw, 48px);
    background: var(--grad-tech-soft);
    border: 1px solid rgba(61,124,255,0.18);
    border-radius: 10px;
    padding: 10px;
}
.info-label { font-size: var(--fs-xs) !important; }
.info-value { font-size: var(--fs-sm) !important; }
.social-links a.social-link {
    width: 40px; height: 40px;
    display: inline-flex; align-items: center; justify-content: center;
    border-radius: 50%;
    background: #fff;
    border: 1px solid var(--color-border);
    transition: all 0.3s cubic-bezier(.2,.7,.2,1);
}
.social-links .social-link svg { width: 18px; height: 18px; }
.social-links .social-link:hover {
    background: var(--grad-tech);
    color: #fff;
    border-color: transparent;
    transform: translateY(-3px) scale(1.06);
    box-shadow: 0 10px 24px -6px var(--color-tech-glow);
}

/* 地图区域 */
.contact-map-section {
    margin-top: clamp(40px, 4vw, 64px);
    border-radius: clamp(10px, 1vw, 14px);
    overflow: hidden;
    border: 1px solid var(--color-border);
}
.contact-map-placeholder {
    width: 100%;
    height: clamp(200px, 24vw, 320px);
    background:
        linear-gradient(135deg, rgba(61,124,255,0.06) 0%, rgba(0,229,255,0.04) 100%),
        #f7f9fc;
    display: flex;
    align-items: center;
    justify-content: center;
}
.map-placeholder-content {
    text-align: center;
    color: var(--color-text-muted);
}
.map-placeholder-content svg {
    display: block;
    margin: 0 auto 12px;
    color: var(--color-accent);
}
.map-placeholder-content p {
    margin: 0;
    font-size: var(--fs-md);
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* FAQ */
.contact-faq-section {
    margin-top: clamp(40px, 4vw, 64px);
    max-width: 860px;
}
.contact-faq-section h2 {
    font-size: var(--fs-2xl);
    font-weight: 600;
    margin: 0 0 clamp(16px, 1.6vw, 24px);
}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.faq-item {
    border: 1px solid var(--color-border);
    border-radius: clamp(8px, 0.8vw, 12px);
    background: #fff;
    overflow: hidden;
    transition: all 0.25s ease;
}
.faq-item:hover { border-color: rgba(61,124,255,0.3); }
.faq-item[open] {
    border-color: rgba(61,124,255,0.25);
    box-shadow: 0 0 0 1px rgba(61,124,255,0.08);
}
.faq-question {
    cursor: pointer;
    padding: clamp(14px, 1.4vw, 20px) clamp(16px, 1.6vw, 24px);
    font-size: var(--fs-base);
    font-weight: 600;
    color: var(--color-text-primary);
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    user-select: none;
}
.faq-question::-webkit-details-marker { display: none; }
.faq-question::after {
    content: '';
    flex-shrink: 0;
    width: 20px; height: 20px;
    background: currentColor;
    -webkit-mask: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") center/contain no-repeat;
    mask: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E") center/contain no-repeat;
    transition: transform 0.25s ease;
}
.faq-item[open] .faq-question::after { transform: rotate(180deg); }
.faq-answer {
    padding: 0 clamp(16px, 1.6vw, 24px) clamp(14px, 1.4vw, 20px);
}
.faq-answer p {
    margin: 0;
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ---------- 按钮升级 ---------- */
.btn { font-size: var(--fs-base) !important; padding: 12px 26px !important; border-radius: 10px; }
.btn-lg { padding: 14px 32px !important; font-size: var(--fs-md) !important; }

/* ---------- 空状态 ---------- */
.empty-state {
    background: #fff;
    border: 1px dashed var(--color-border);
    border-radius: clamp(12px, 1.2vw, 18px);
    padding: clamp(40px, 5vw, 72px) var(--space-md) !important;
}
.empty-state p { font-size: var(--fs-md); }

/* ---------- Footer 升级 ---------- */
.site-footer {
    background: linear-gradient(180deg, var(--color-bg-page) 0%, #ECEEF3 100%);
    padding: clamp(24px, 2.4vw, 40px) 0 !important;
    position: relative;
    overflow: hidden;
}
.site-footer::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(61,124,255,0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(61,124,255,0.04) 1px, transparent 1px);
    background-size: 40px 40px;
    mask-image: linear-gradient(to bottom, transparent, #000 50%);
    -webkit-mask-image: linear-gradient(to bottom, transparent, #000 50%);
    pointer-events: none;
}
.footer-inner { position: relative; z-index: 1; gap: clamp(12px, 1.2vw, 20px); }
.footer-copyright, .footer-link { font-size: var(--fs-sm) !important; }
.footer-link { position: relative; transition: color 0.25s ease; }
.footer-link:hover { color: var(--color-accent); }

/* ---------- 小屏兼容 ---------- */
@media (max-width: 991px) {
    .contact-layout { grid-template-columns: 1fr !important; }
    .case-detail-body { grid-template-columns: 1fr !important; }
}
@media (max-width: 640px) {
    .page-header { padding: 56px 0 32px; margin-bottom: 20px; }
    .footer-inner { flex-direction: column; text-align: center; }
    .timeline-year { font-size: var(--fs-xs); }
    .news-thumb { flex: 0 0 auto; }
}
@media (hover: none) {
    .news-item:hover, .case-item:hover .case-image,
    .value-card:hover, .stat-item:hover,
    .contact-info-section .info-card:hover { transform: none; }
}

/* 语言切换器样式已拆分至 /style/css/lang-switcher.css，与子页共用并便于单独部署 */