/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #00d4ff;
    --secondary-color: #0099ff;
    --accent-color: #ff00ff;
    --dark-bg: #0a0e27;
    --darker-bg: #050814;
    --card-bg: rgba(15, 23, 42, 0.8);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --gradient-1: linear-gradient(135deg, #00d4ff 0%, #0099ff 100%);
    --gradient-2: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-3: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-brand .logo-icon {
    width: 40px;
    height: 40px;
    transition: transform 0.3s;
}

.nav-brand:hover .logo-icon {
    transform: scale(1.1) rotate(5deg);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s;
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: 0.3s;
}

/* 首页横幅 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(102, 126, 234, 0.1) 0%, transparent 50%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-content {
    text-align: center;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-title {
    font-size: 4rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.8rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.hero-desc {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

.btn {
    padding: 12px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
    border: none;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 2rem;
    color: var(--primary-color);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* 通用区块样式 */
section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

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

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

.about-text h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--card-bg);
    border-radius: 10px;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    margin-top: 10px;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 400px;
    height: 400px;
    background: var(--card-bg);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(0, 212, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.image-placeholder::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        transparent,
        rgba(0, 212, 255, 0.1),
        transparent 30%
    );
    animation: rotate 4s linear infinite;
}

@keyframes rotate {
    100% { transform: rotate(360deg); }
}

.image-placeholder i {
    font-size: 8rem;
    color: var(--primary-color);
    z-index: 1;
}

/* 服务项目 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.service-icon i {
    font-size: 2.5rem;
    color: white;
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.service-card > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.service-features {
    list-style: none;
}

.service-features li {
    color: var(--text-secondary);
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
}

.service-features li::before {
    content: '▹';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 1.2rem;
}

/* 案例展示 */
.cases {
    background: var(--darker-bg);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.case-card {
    background: var(--card-bg);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: all 0.3s;
}

.case-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
}

.case-image {
    height: 200px;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(102, 126, 234, 0.1) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-image .image-placeholder {
    width: 100%;
    height: 100%;
    border: none;
    border-radius: 0;
}

.case-image i {
    font-size: 4rem;
    color: var(--primary-color);
}

.case-content {
    padding: 30px;
}

.case-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.case-category {
    color: var(--primary-color);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.case-desc {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    padding: 5px 15px;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    font-size: 0.85rem;
    color: var(--primary-color);
}

/* 自研产品 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.product-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: all 0.3s;
    text-align: center;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 212, 255, 0.2);
}

.product-icon {
    width: 100px;
    height: 100px;
    background: var(--gradient-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.product-icon i {
    font-size: 3rem;
    color: white;
}

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

.product-card > p {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 25px;
}

.product-features span {
    padding: 8px 15px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.product-features i {
    color: var(--primary-color);
    margin-right: 5px;
}

.product-link {
    display: inline-block;
    padding: 12px 30px;
    background: var(--gradient-2);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s;
}

.product-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

/* 联系我们 */
.contact {
    background: var(--darker-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 25px;
    background: var(--card-bg);
    border-radius: 15px;
    border: 1px solid rgba(0, 212, 255, 0.1);
    transition: all 0.3s;
    cursor: pointer;
}

.contact-item:hover {
    border-color: var(--primary-color);
    transform: translateX(10px);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.5rem;
    color: white;
}

.contact-text h4 {
    margin-bottom: 5px;
    color: var(--text-primary);
}

.contact-text p {
    color: var(--text-secondary);
}

.contact-form {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.contact-form h3 {
    margin-bottom: 30px;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.08);
}

.form-group textarea {
    resize: vertical;
}

/* 页脚 */
.footer {
    background: var(--darker-bg);
    padding: 60px 0 30px;
    border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.footer-section p {
    color: var(--text-secondary);
    line-height: 1.8;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-section ul li i {
    margin-right: 10px;
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: all 0.3s;
}

.social-links a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(0, 212, 255, 0.1);
    color: var(--text-secondary);
}

.footer-bottom p {
    margin: 5px 0;
}

.footer-bottom a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

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

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    position: relative;
    background: var(--card-bg);
    margin: 10% auto;
    padding: 40px;
    width: 90%;
    max-width: 500px;
    border-radius: 20px;
    border: 1px solid rgba(0, 212, 255, 0.2);
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 2rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.3s;
}

.modal-close:hover {
    color: var(--primary-color);
}

.modal-content h3 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--primary-color);
}

.qrcode-container {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.qrcode-placeholder {
    width: 250px;
    height: 250px;
    background: white;
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.qrcode-placeholder i {
    font-size: 4rem;
    color: #07c160;
}

.qrcode-placeholder p {
    color: #333;
    font-weight: 600;
}

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

.modal-info p {
    color: var(--text-secondary);
    margin: 10px 0;
}

.modal-info i {
    color: var(--primary-color);
    margin-right: 10px;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-1);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(10, 14, 39, 0.98);
        width: 100%;
        padding: 20px;
        transition: 0.3s;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .services-grid,
    .cases-grid,
    .products-grid {
        grid-template-columns: 1fr;
    }

    .image-placeholder {
        width: 100%;
        height: 300px;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   SEO / GEO 内容组件（内页、FAQ、结构化内容）
   ========================================================================== */

/* 无障碍：跳转到主内容 */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    z-index: 3000;
    padding: 12px 20px;
    background: var(--primary-color);
    color: #050814;
    font-weight: 700;
    text-decoration: none;
    border-radius: 0 0 8px 0;
}

.skip-link:focus {
    left: 0;
}

/* 仅供屏幕阅读器 */
.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 3px;
}

/* 首屏价值标签 */
.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin: 1.5rem 0 2rem;
}

.hero-badges span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 16px;
    border: 1px solid rgba(0, 212, 255, 0.3);
    background: rgba(0, 212, 255, 0.06);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hero-badges i {
    color: var(--primary-color);
}

/* 信任条 */
.trust-bar {
    border-top: 1px solid rgba(0, 212, 255, 0.1);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    background: var(--darker-bg);
    padding: 26px 0;
}

.trust-bar ul {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 18px;
    list-style: none;
    text-align: center;
}

.trust-bar li {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.trust-bar strong {
    display: block;
    color: var(--primary-color);
    font-size: 1.6rem;
    line-height: 1.2;
}

/* GEO：答案优先摘要框 */
.answer-box {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(102, 126, 234, 0.08));
    border: 1px solid rgba(0, 212, 255, 0.25);
    border-left: 4px solid var(--primary-color);
    border-radius: 14px;
    padding: 28px 30px;
    margin: 0 0 40px;
}

.answer-box h2,
.answer-box h3 {
    font-size: 1.05rem;
    color: var(--primary-color);
    letter-spacing: 1px;
    margin-bottom: 12px;
    text-transform: uppercase;
}

.answer-box p {
    color: var(--text-primary);
    line-height: 1.9;
    margin-bottom: 10px;
}

.answer-box p:last-child {
    margin-bottom: 0;
}

.answer-box a {
    color: var(--primary-color);
}

/* 内页头部 */
.page-hero {
    padding: 150px 0 70px;
    background:
        radial-gradient(circle at 15% 20%, rgba(0, 212, 255, 0.12) 0%, transparent 55%),
        radial-gradient(circle at 85% 80%, rgba(102, 126, 234, 0.12) 0%, transparent 55%),
        var(--darker-bg);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
}

.page-hero h1 {
    font-size: 2.6rem;
    line-height: 1.3;
    margin: 18px 0 16px;
}

.page-hero .lead {
    color: var(--text-secondary);
    font-size: 1.15rem;
    max-width: 820px;
    line-height: 1.9;
}

.page-meta {
    color: var(--text-secondary);
    font-size: 0.88rem;
    margin-top: 18px;
}

.icon-badge {
    width: 64px;
    height: 64px;
    border-radius: 18px;
    background: var(--gradient-1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.7rem;
    color: #fff;
}

/* 面包屑 */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    list-style: none;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.breadcrumb li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.breadcrumb li + li::before {
    content: '/';
    color: rgba(148, 163, 184, 0.5);
}

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

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

.breadcrumb [aria-current='page'] {
    color: var(--primary-color);
}

/* 正文排版 */
.prose h2 {
    font-size: 1.9rem;
    margin: 54px 0 18px;
    color: var(--text-primary);
    line-height: 1.4;
}

.prose h3 {
    font-size: 1.3rem;
    margin: 34px 0 12px;
    color: var(--primary-color);
}

.prose p,
.prose li {
    color: var(--text-secondary);
    line-height: 1.95;
    font-size: 1.02rem;
}

.prose p {
    margin-bottom: 18px;
}

.prose ul,
.prose ol {
    margin: 0 0 22px 1.3em;
}

.prose li {
    margin-bottom: 8px;
}

.prose strong {
    color: var(--text-primary);
}

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

.prose > p:first-child {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.section-block {
    padding: 80px 0;
}

.section-block.alt {
    background: var(--darker-bg);
}

.section-head {
    margin-bottom: 42px;
}

.section-head h2 {
    font-size: 1.9rem;
    margin-bottom: 10px;
}

.section-head p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 卡片网格 */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.info-card {
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 16px;
    padding: 28px;
    transition: border-color 0.3s, transform 0.3s;
}

.info-card:hover {
    border-color: rgba(0, 212, 255, 0.5);
    transform: translateY(-4px);
}

.info-card h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.info-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.96rem;
}

.info-card .card-index {
    display: inline-block;
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

/* 勾选列表 */
.check-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 12px 28px;
}

.check-list li {
    position: relative;
    padding-left: 28px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.check-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* 流程步骤 */
.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 20px;
    counter-reset: step;
}

.step {
    position: relative;
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 16px;
    padding: 26px 24px;
}

.step::before {
    counter-increment: step;
    content: '0' counter(step);
    display: block;
    font-size: 1.6rem;
    font-weight: 700;
    color: rgba(0, 212, 255, 0.45);
    margin-bottom: 10px;
}

.step h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.94rem;
    line-height: 1.75;
}

/* 数据表格 */
.table-wrap {
    overflow-x: auto;
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 14px;
    margin: 26px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 560px;
    font-size: 0.96rem;
}

caption {
    caption-side: top;
    text-align: left;
    padding: 16px 20px 0;
    color: var(--text-secondary);
    font-size: 0.86rem;
}

th,
td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    vertical-align: top;
    line-height: 1.7;
}

th {
    color: var(--primary-color);
    background: rgba(0, 212, 255, 0.06);
    font-weight: 600;
    white-space: nowrap;
}

td {
    color: var(--text-secondary);
}

tbody tr:last-child td {
    border-bottom: none;
}

/* FAQ */
.faq-list {
    display: grid;
    gap: 14px;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.14);
    border-radius: 14px;
    padding: 0 24px;
    transition: border-color 0.3s;
}

.faq-item[open] {
    border-color: rgba(0, 212, 255, 0.45);
}

.faq-item summary {
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 20px 0;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    color: var(--primary-color);
    font-size: 1.4rem;
    line-height: 1;
    flex-shrink: 0;
}

.faq-item[open] summary::after {
    content: '−';
}

.faq-item .faq-answer {
    padding: 0 0 22px;
    color: var(--text-secondary);
    line-height: 1.9;
}

.faq-item .faq-answer p {
    margin-bottom: 10px;
}

.faq-item .faq-answer p:last-child {
    margin-bottom: 0;
}

.faq-item .faq-answer a {
    color: var(--primary-color);
}

/* CTA 区块 */
.cta-band {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.12), rgba(102, 126, 234, 0.16));
    border: 1px solid rgba(0, 212, 255, 0.3);
    border-radius: 20px;
    padding: 46px 40px;
    text-align: center;
}

.cta-band h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.cta-band p {
    color: var(--text-secondary);
    margin-bottom: 26px;
    line-height: 1.8;
}

.cta-band .btn + .btn {
    margin-left: 12px;
}

/* 相关服务 */
.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 18px;
}

.related-card {
    display: block;
    background: var(--card-bg);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: 14px;
    padding: 22px;
    text-decoration: none;
    transition: all 0.3s;
}

.related-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-4px);
}

.related-card h3 {
    color: var(--text-primary);
    font-size: 1.05rem;
    margin-bottom: 6px;
}

.related-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* 页脚扩展：服务链接 */
.footer-section ul li a[aria-current='page'] {
    color: var(--primary-color);
}

.footer-note {
    margin-top: 12px;
    font-size: 0.85rem;
    color: rgba(148, 163, 184, 0.75);
    line-height: 1.7;
}

/* 更新日期 */
.last-updated {
    font-size: 0.85rem;
    color: rgba(148, 163, 184, 0.8);
}

/* 响应式补充 */
@media (max-width: 768px) {
    .page-hero {
        padding: 120px 0 50px;
    }

    .page-hero h1 {
        font-size: 1.8rem;
    }

    .page-hero .lead {
        font-size: 1rem;
    }

    .prose h2 {
        font-size: 1.45rem;
        margin-top: 40px;
    }

    .section-block {
        padding: 60px 0;
    }

    .cta-band {
        padding: 34px 22px;
    }

    .cta-band h2 {
        font-size: 1.4rem;
    }

    .cta-band .btn {
        display: block;
        width: 100%;
    }

    .cta-band .btn + .btn {
        margin: 12px 0 0;
    }

    .answer-box {
        padding: 22px;
    }

    .hero-badges span {
        font-size: 0.82rem;
    }
}

/* 首屏 H1 副标题（关键词补充） */
.hero-h1-sub {
    display: block;
    margin-top: 16px;
    font-size: 1.45rem;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--text-secondary);
}

/* 服务卡片“了解详情”链接 */
.service-more {
    margin-top: 18px;
}

.service-more a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-color);
    font-size: 0.92rem;
    text-decoration: none;
}

.service-more a:hover {
    text-decoration: underline;
}

/* 按钮化导航开关（保持原有视觉） */
.nav-toggle {
    background: none;
    border: 0;
    padding: 4px;
}

/* 表单下拉框 */
.form-group select {
    width: 100%;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s;
    appearance: none;
    -webkit-appearance: none;
    background-image: linear-gradient(45deg, transparent 50%, var(--primary-color) 50%),
        linear-gradient(135deg, var(--primary-color) 50%, transparent 50%);
    background-position: calc(100% - 20px) calc(50% + 2px), calc(100% - 14px) calc(50% + 2px);
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
}

.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: rgba(255, 255, 255, 0.08);
}

.form-group select option {
    background: #0f172a;
    color: var(--text-primary);
}

/* 联系信息与二维码图片 */
.contact-text a,
.modal-info a {
    color: inherit;
    text-decoration: none;
}

.contact-text a:hover,
.modal-info a:hover {
    color: var(--primary-color);
}

.qrcode-placeholder p {
    width: 100%;
    height: 100%;
    margin: 0;
}

.qrcode-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 15px;
    display: block;
}

@media (max-width: 768px) {
    .hero-h1-sub {
        font-size: 1.05rem;
    }
}

/* 7 项导航在中等宽度下收紧，避免换行 */
@media (max-width: 1024px) {
    .nav-menu {
        gap: 1.15rem;
    }

    .nav-menu a {
        font-size: 0.92rem;
    }

    .nav-brand {
        font-size: 1.15rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }

    .service-card,
    .case-card,
    .product-card,
    .contact-item {
        opacity: 1 !important;
        transform: none !important;
    }
}