/* 古钛科技官网 V2.0 样式表 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
    --primary: #0077ff;
    --primary-gradient: linear-gradient(135deg, #0077ff 0%, #00a2ff 100%);
    --secondary: #1a1a2e;
    --accent: #00d2ff;
    --text-main: #2d3436;
    --text-muted: #636e72;
    --bg-white: #ffffff;
    --bg-light: #f9fbfd;
    --bg-dark: #0f172a;
    --glass: rgba(255, 255, 255, 0.8);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.05);
    --shadow-strong: 0 20px 40px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

body {
    font-family: 'Inter', 'Noto Sans SC', sans-serif;
    color: var(--text-main);
    line-height: 1.7;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 30px;
}

/* 导航栏升级 */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 20px 0;
}

.header.scrolled {
    background: var(--glass);
    backdrop-filter: blur(15px);
    padding: 12px 0;
    box-shadow: var(--shadow-soft);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 12px;
}

.logo img {
    height: 44px;
    border-radius: 8px;
}

.logo-text {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--secondary);
    letter-spacing: -0.5px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 35px;
}

.nav-link {
    text-decoration: none;
    color: var(--secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition);
}

.nav-link:hover:after {
    width: 100%;
}

.btn-contact {
    background: var(--primary-gradient);
    color: white !important;
    padding: 10px 24px !important;
    border-radius: 50px;
}

.btn-contact:after { display: none; }

/* 首页视觉区优化 */
.hero {
    position: relative;
    min-height: 100vh;
    padding-top: 120px;
    display: flex;
    align-items: center;
    background: var(--bg-light);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.15;
}

.circle-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -100px;
    right: -100px;
}

.circle-2 {
    width: 400px;
    height: 400px;
    background: var(--accent);
    bottom: -50px;
    left: -50px;
}

.hero .container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    position: relative;
    z-index: 1;
}

.hero-tagline {
    font-size: 1.1rem;
    color: var(--primary);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
    display: block;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: 25px;
}

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

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin-bottom: 45px;
}

.hero-btns {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 15px 35px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: 0 10px 20px rgba(0, 119, 255, 0.2);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0, 119, 255, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--secondary);
    box-shadow: var(--shadow-soft);
}

.btn-secondary:hover {
    background: var(--bg-light);
    transform: translateY(-3px);
}

/* 技术视觉效果 */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.tech-stack-visual {
    position: relative;
    width: 350px;
    height: 350px;
}

.tech-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: var(--primary-gradient);
    border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    box-shadow: var(--shadow-strong);
    animation: blob 8s infinite ease-in-out;
}

@keyframes blob {
    0%, 100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
    50% { border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%; }
}

.tech-item {
    position: absolute;
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-soft);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--primary);
}

.ai { top: 0; left: 0; animation: float 6s infinite ease-in-out; }
.iot { bottom: 20px; right: 0; animation: float 8s infinite ease-in-out 1s; }
.cloud { top: 40px; right: 20px; animation: float 7s infinite ease-in-out 0.5s; }

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

/* 通用 Section 升级 */
.section {
    padding: 120px 0;
}

.sub-title {
    color: var(--primary);
    font-weight: 700;
    font-size: 0.85rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    display: block;
    margin-bottom: 15px;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--secondary);
    margin-bottom: 30px;
}

.centered {
    text-align: center;
}

.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

/* 关于我们数据卡片 */
.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

.stat-card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-strong);
}

.stat-card.highlight {
    background: var(--primary-gradient);
    color: white;
}

.stat-card .num {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 5px;
}

.culture-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 40px;
}

.culture-item i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 15px;
}

/* 技术架构层级 */
.tech-layers {
    margin-top: 60px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.layer {
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    transition: var(--transition);
}

.layer:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-strong);
}

.layer-head {
    background: var(--bg-dark);
    color: white;
    padding: 20px 30px;
    font-weight: 700;
    font-size: 1.2rem;
}

.layer-body {
    padding: 25px 30px;
    color: var(--text-muted);
}

/* 产品瀑布流/网格 */
.products-masonry {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.product-item {
    background: var(--bg-light);
    padding: 45px 35px;
    border-radius: 24px;
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.03);
}

.product-item:hover {
    background: white;
    box-shadow: var(--shadow-strong);
    transform: translateY(-10px);
}

.product-item.highlight {
    background: var(--bg-dark);
    color: white;
}

.product-item.highlight .p-icon i {
    color: var(--accent);
}

.product-item.highlight h3 {
    color: white;
}

.p-icon i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 25px;
    display: block;
}

.product-item h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.product-item p {
    font-size: 0.95rem;
    color: var(--text-muted);
    margin-bottom: 25px;
}

.product-item.highlight p {
    color: #a0aec0;
}

.product-item ul {
    list-style: none;
}

.product-item ul li {
    margin-bottom: 10px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 市场布局 */
.region-list {
    list-style: none;
    margin-top: 30px;
}

.region-list li {
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.region-list li span {
    font-weight: 700;
    color: var(--primary);
    width: 100px;
    display: inline-block;
}

/* 团队横幅 */
.team-banner {
    background: var(--bg-dark);
    border-radius: 30px;
    padding: 80px;
    color: white;
    text-align: center;
}

.team-content h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.team-tags {
    margin-top: 40px;
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.team-tags span {
    background: rgba(255,255,255,0.1);
    padding: 8px 25px;
    border-radius: 50px;
    font-size: 0.9rem;
}

/* 联系我们卡片 */
.contact-card {
    background: white;
    border-radius: 30px;
    box-shadow: var(--shadow-strong);
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    overflow: hidden;
}

.contact-info {
    background: var(--primary-gradient);
    color: white;
    padding: 60px;
}

.contact-info h2 {
    margin-bottom: 20px;
}

.c-detail {
    margin-top: 50px;
}

.c-item {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 25px;
    font-size: 1.1rem;
}

.contact-form {
    padding: 60px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

input, textarea {
    width: 100%;
    padding: 15px 20px;
    background: var(--bg-light);
    border: 1px solid transparent;
    border-radius: 12px;
    font-size: 1rem;
    transition: var(--transition);
}

input:focus, textarea:focus {
    outline: none;
    background: white;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 119, 255, 0.1);
}

/* 页脚 */
.footer {
    background: #f1f5f9;
    padding: 80px 0 40px;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 40px;
    border-bottom: 1px solid #e2e8f0;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.2rem;
}

.footer-logo img { height: 40px; border-radius: 5px; }

.footer-links {
    display: flex;
    gap: 40px;
}

.footer-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
}

.footer-bottom {
    margin-top: 40px;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* 主力推介产品样式 */
.featured-card {
    background: var(--bg-dark);
    border-radius: 40px;
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    overflow: hidden;
    color: white;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.2);
    margin-top: 40px;
}

.featured-image {
    background: linear-gradient(45deg, #0f172a 0%, #1e293b 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 400px;
}

.featured-image i {
    color: var(--primary);
    filter: drop-shadow(0 0 20px rgba(0, 119, 255, 0.4));
    z-index: 1;
}

.glow-effect {
    position: absolute;
    width: 200px;
    height: 200px;
    background: var(--primary);
    filter: blur(100px);
    opacity: 0.3;
}

.featured-content {
    padding: 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.badge-new {
    display: inline-block;
    padding: 5px 15px;
    background: var(--primary-gradient);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 700;
    margin-bottom: 20px;
    width: fit-content;
}

.featured-content h3 {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: white;
}

.featured-desc {
    font-size: 1.1rem;
    color: #a0aec0;
    margin-bottom: 35px;
    line-height: 1.8;
}

.featured-specs {
    display: flex;
    gap: 30px;
    margin-bottom: 40px;
}

.spec-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
}

.spec-item i {
    color: var(--primary);
}

.floating-tags {
    position: absolute;
    width: 100%;
    height: 100%;
}

.f-tag {
    position: absolute;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    padding: 6px 15px;
    border-radius: 50px;
    font-size: 0.8rem;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.f-tag:nth-child(1) { top: 20%; left: 10%; animation: float 5s infinite; }
.f-tag:nth-child(2) { top: 70%; right: 15%; animation: float 6s infinite 1s; }
.f-tag:nth-child(3) { bottom: 20%; left: 20%; animation: float 7s infinite 0.5s; }

/* 价值对比 */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 60px 1fr;
    gap: 0;
    margin-top: 60px;
    align-items: center;
}

.comp-card {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 30px;
    height: 100%;
}

.comp-card.highlight {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-strong);
    transform: scale(1.05);
    z-index: 2;
}

.comp-card h4 {
    font-size: 1.4rem;
    margin-bottom: 25px;
    text-align: center;
}

.comp-card ul {
    list-style: none;
}

.comp-card ul li {
    margin-bottom: 15px;
    display: flex;
    gap: 12px;
    font-size: 1rem;
}

.comp-card ul li i { margin-top: 4px; }
.comp-card:not(.highlight) ul li i { color: var(--primary); }

.comp-vs {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--primary);
    text-align: center;
    font-style: italic;
    opacity: 0.5;
}

/* 子系统 */
.subsystems-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 60px;
}

.sub-item {
    background: white;
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 1px solid #f1f5f9;
}

.sub-icon {
    width: 60px;
    height: 60px;
    background: var(--primary-bg);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.sub-icon i {
    font-size: 1.5rem;
    color: var(--primary);
}

.sub-item h4 {
    margin-bottom: 12px;
    color: var(--secondary);
}

.sub-item p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* 行动条 */
.action-bar {
    margin-top: 80px;
    background: var(--bg-dark);
    padding: 40px 60px;
    border-radius: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: white;
}

.impact-stats {
    display: flex;
    gap: 50px;
}

.i-stat {
    font-size: 0.95rem;
    color: #a0aec0;
}

.i-stat span {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent);
}

/* 技术标签 */
.layer-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.layer-tags span {
    background: var(--bg-light);
    padding: 5px 15px;
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary);
    border: 1px solid rgba(0, 119, 255, 0.1);
}

/* 流程步骤样式 */
.workflow-steps {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-top: 60px;
}

.w-step {
    text-align: center;
    position: relative;
}

.w-step:not(:last-child):after {
    content: '\f105';
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    right: -10px;
    top: 30px;
    color: var(--primary);
    opacity: 0.3;
}

.w-num {
    width: 60px;
    height: 60px;
    background: var(--primary-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.2rem;
    font-weight: 800;
    box-shadow: 0 10px 20px rgba(0, 119, 255, 0.2);
}

.w-step h4 {
    margin-bottom: 10px;
    color: var(--secondary);
}

.w-step p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* 智能引擎模块样式 */
.engine-section {
    background: #f8fafc;
    padding: 80px 40px;
    border-radius: 40px;
    margin-top: 80px;
}

.engine-steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 50px;
    gap: 20px;
}

.e-box {
    flex: 1;
    background: white;
    padding: 30px 20px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 1px solid #f1f5f9;
}

.e-icon {
    width: 60px;
    height: 60px;
    background: rgba(0,119,255,0.1);
    color: var(--primary);
    margin: 0 auto 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    border-radius: 16px;
}

.e-box h5 {
    margin-bottom: 10px;
    color: var(--secondary);
    font-size: 1.1rem;
}

.e-box p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.e-arrow {
    color: var(--primary);
    opacity: 0.3;
    font-size: 1.2rem;
}

/* 响应式适配 */
@media (max-width: 992px) {
    .hero .container, .grid-2, .contact-card, .featured-card, .subsystems-grid, .workflow-steps, .engine-steps {
        grid-template-columns: 1fr;
        flex-direction: column;
    }

    .e-arrow { transform: rotate(90deg); margin: 10px 0; }

    .w-step:not(:last-child):after {
        display: none;
    }

    .comparison-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .comp-card.highlight {
        transform: none;
    }

    .comp-vs { display: none; }

    .action-bar {
        flex-direction: column;
        gap: 40px;
        text-align: center;
        padding: 40px 30px;
    }

    .impact-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .featured-content {
        padding: 40px 30px;
    }

    .featured-image {
        min-height: 300px;
    }

    .hero-title { font-size: 3rem; }
    
    .hero-image { display: none; }
}

@media (max-width: 768px) {
    .nav { display: none; }
    
    .section-title { font-size: 2.2rem; }
    
    .form-row { grid-template-columns: 1fr; }
    
    .team-banner { padding: 40px 20px; }
}

/* 视频显示样式 */
.product-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius);
    box-shadow: var(--shadow-strong);
    display: block;
}

.featured-image {
    position: relative;
    overflow: hidden;
    background: #000; /* 视频未加载时的背景 */
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
}

/* 灵瞳卡片 - 紫色主题 */
.lingtong-card {
    border: 1px solid rgba(139,92,246,0.3);
}

.lingtong-card .product-hero-icon {
    background: rgba(139,92,246,0.15);
}

.lingtong-card .product-hero-icon i {
    color: #a78bfa;
}

.lingtong-card .product-badge {
    background: rgba(139,92,246,0.2);
    border-color: rgba(139,92,246,0.3);
    color: #c4b5fd;
}

.lingtong-card:hover {
    box-shadow: 0 30px 60px rgba(139,92,246,0.2);
}

/* 灵瞳检测能力流程 - 紫色图标 */
.lingtong-capabilities .e-icon {
    background: rgba(139,92,246,0.1) !important;
    color: #8b5cf6 !important;
}

.lingtong-capabilities .e-box {
    border-color: rgba(139,92,246,0.1);
}

.lingtong-capabilities .e-box h5 {
    color: #1e293b;
}

.lingtong-capabilities .e-arrow {
    color: #8b5cf6;
}

/* 灵瞳引擎区块 - 紫色背景 */
.lingtong-capabilities.engine-section {
    background: linear-gradient(180deg, #f8fafc 0%, #ede9fe 100%);
    border: 1px solid rgba(139,92,246,0.1);
}

/* 引擎步骤响应式优化 */

/* 双旗舰产品 - 大幅卡片设计 */
.dual-products {
    display: flex;
    flex-direction: column;
    gap: 50px;
    margin-top: 60px;
}

.product-featured-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    text-decoration: none;
    color: inherit;
    background: white;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-strong);
    transition: var(--transition);
    min-height: 380px;
}

.product-featured-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 30px 60px rgba(0,0,0,0.15);
}

/* 媒体区 */
.pfc-media {
    position: relative;
    overflow: hidden;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 380px;
}

.pfc-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.pfc-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.15);
    opacity: 0;
    transition: var(--transition);
}

.product-featured-card:hover .pfc-overlay {
    opacity: 1;
}

.pfc-overlay i {
    font-size: 3rem;
    color: white;
    filter: drop-shadow(0 4px 20px rgba(0,0,0,0.4));
}

/* 灵瞳视觉效果 - 扫描动画 */
.lingtong-media {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.pfc-visual {
    position: relative;
    width: 200px;
    height: 200px;
}

.scan-line {
    position: absolute;
    top: 0;
    left: -10%;
    right: -10%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #8b5cf6, transparent);
    animation: scanMove 3s infinite ease-in-out;
    box-shadow: 0 0 20px rgba(139,92,246,0.5);
}

@keyframes scanMove {
    0%, 100% { top: 0; }
    50% { top: 100%; }
}

.detection-box {
    position: absolute;
    border: 2px solid rgba(139,92,246,0.6);
    border-radius: 4px;
    animation: boxPulse 2s infinite ease-in-out;
}

.detection-box::after {
    content: '';
    position: absolute;
    top: -8px;
    left: -2px;
    background: #8b5cf6;
    color: white;
    font-size: 0.6rem;
    padding: 1px 6px;
    border-radius: 3px;
}

.box-1 {
    width: 80px;
    height: 60px;
    top: 20px;
    left: 20px;
    animation-delay: 0s;
}
.box-1::after { content: '98%'; }

.box-2 {
    width: 60px;
    height: 80px;
    top: 40px;
    right: 30px;
    animation-delay: 0.5s;
}
.box-2::after { content: '95%'; }

.box-3 {
    width: 70px;
    height: 50px;
    bottom: 30px;
    left: 60px;
    animation-delay: 1s;
}
.box-3::after { content: '92%'; }

@keyframes boxPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.02); }
}

.pfc-icon-center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 2.5rem;
    color: rgba(139,92,246,0.3);
}

/* 内容区 */
.pfc-content {
    padding: 50px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.pfc-badge {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(0,119,255,0.1);
    border: 1px solid rgba(0,119,255,0.2);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 20px;
    letter-spacing: 1px;
    width: fit-content;
}

.pfc-content h3 {
    color: var(--secondary);
    font-size: 1.8rem;
    margin-bottom: 15px;
    line-height: 1.3;
}

.pfc-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

.pfc-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 25px;
}

.pfc-tags span {
    background: var(--bg-light);
    border: 1px solid #e2e8f0;
    padding: 5px 14px;
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.pfc-link {
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.pfc-link i {
    transition: var(--transition);
}

.product-featured-card:hover .pfc-link i {
    transform: translateX(5px);
}

/* 地铁卡片 */
.subway-card .pfc-media {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

/* 灵瞳卡片 */
.lingtong-card .pfc-badge {
    background: rgba(139,92,246,0.1);
    border-color: rgba(139,92,246,0.2);
    color: #7c3aed;
}

.lingtong-card:hover {
    box-shadow: 0 30px 60px rgba(139,92,246,0.15);
}

/* 灵瞳详情区块 */
.lingtong-detail {
    background: linear-gradient(180deg, #f8fafc 0%, #ede9fe 100%);
}

.lingtong-detail .section-header {
    margin-bottom: 40px;
}

/* 产品特色服务网格 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-top: 50px;
}

.feature-card {
    background: white;
    padding: 35px 25px;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(139,92,246,0.08);
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(139,92,246,0.12);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: rgba(139,92,246,0.1);
    color: #8b5cf6;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.5rem;
}

.feature-card h4 {
    margin-bottom: 12px;
    color: var(--secondary);
    font-size: 1.1rem;
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* 了解更多按钮 */
.detail-cta {
    text-align: center;
    margin-top: 50px;
}

.btn-lingtong {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 36px;
    background: linear-gradient(135deg, #8b5cf6 0%, #6d28d9 100%);
    color: white;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 10px 25px rgba(139,92,246,0.3);
}

.btn-lingtong:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(139,92,246,0.4);
    color: white;
}

/* 关于我们 */
.about-section {
    background: var(--bg-light);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-info .desc {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.8;
}

.culture-item {
    background: white;
    padding: 25px;
    border-radius: 16px;
    box-shadow: var(--shadow-soft);
}

.culture-item i {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.culture-item h4 {
    margin-bottom: 6px;
    color: var(--secondary);
}

.culture-item p {
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* 双旗舰产品响应式 */
@media (max-width: 768px) {
    .product-featured-card {
        grid-template-columns: 1fr;
        min-height: auto;
    }
    .pfc-media {
        min-height: 250px;
    }
    .pfc-content {
        padding: 30px 25px;
    }
    .pfc-content h3 {
        font-size: 1.4rem;
    }
    .feature-grid {
        grid-template-columns: 1fr;
    }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 480px) {
    .dual-products {
        gap: 30px;
    }
    .product-featured-card {
        min-height: auto;
    }
    .pfc-media {
        min-height: 200px;
    }
    .pfc-content {
        padding: 25px 20px;
    }
    .pfc-content h3 {
        font-size: 1.2rem;
    }
    .pfc-tags span {
        font-size: 0.75rem;
        padding: 4px 10px;
    }
    .feature-card {
        padding: 25px 20px;
    }
}

/* 减少动画 - 无障碍支持 */
@media (prefers-reduced-motion: reduce) {
    .tech-core, .f-tag, .circle {
        animation: none !important;
    }
    .product-video {
        display: none;
    }
}

/* 焦点状态 - 键盘导航 */
.nav-link:focus-visible,
.btn:focus-visible,
.product-item:focus-visible,
.product-featured-card:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 3px;
}

.lingtong-card:focus-within {
    outline: 3px solid #8b5cf6;
    outline-offset: 3px;
}

/* Hero 区域移动端优化 */
@media (max-width: 480px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .hero-btns {
        flex-direction: column;
        gap: 12px;
    }
    .btn {
        padding: 14px 28px;
        font-size: 0.95rem;
        justify-content: center;
    }
    .section {
        padding: 80px 0;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .featured-card {
        border-radius: 24px;
    }
    .featured-content h3 {
        font-size: 1.5rem;
    }
    .engine-section {
        padding: 40px 20px;
        border-radius: 24px;
    }
    .btn-lingtong {
        padding: 14px 28px;
        font-size: 0.9rem;
    }
}