/* 主CSS文件 - 深蓝色主题 */
:root {
    --primary-blue: #0a1f3d;
    --secondary-blue: #1a3a5c;
    --accent-blue: #2d5a87;
    --light-blue: #4a7ba7;
    --text-dark: #333;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --border-color: #e0e0e0;
    --orange-accent: #ff6b35;
}

/* 导航栏 */
.navbar {
    background: rgba(10, 31, 61, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.navbar.hidden {
    transform: translateY(-100%);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: #fff;
    font-weight: 600;
    font-size: 1.2rem;
    transition: opacity 0.3s ease;
}

.nav-logo:hover {
    opacity: 0.9;
}

.nav-logo img {
    height: 40px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-menu a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
    padding: 0.5rem 0;
    position: relative;
}

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

.nav-menu a:hover {
    color: #fff;
}

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

.nav-cta {
    background: var(--orange-accent);
    color: #fff;
    padding: 0.6rem 1.5rem;
    border-radius: 6px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: background 0.3s ease;
}

.nav-cta:hover {
    background: #f7931e;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    transition: opacity 0.3s ease;
}

.mobile-menu-toggle:hover {
    opacity: 0.8;
}

.mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10, 31, 61, 0.98);
    backdrop-filter: blur(10px);
    max-height: calc(100vh - 70px);
    overflow-y: auto;
    z-index: 999;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.mobile-nav.active {
    display: block;
}

.mobile-nav ul {
    list-style: none;
    padding: 1rem 0;
    margin: 0;
}

.mobile-nav li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-nav a {
    display: block;
    padding: 1rem 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: background 0.3s ease;
    font-size: 1rem;
}

.mobile-nav a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* 为导航栏留出空间 - 仅影响非banner内容 */
.hero-banner {
    margin-top: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

section {
    padding: 4rem 0;
}

h2 {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 1rem;
    text-align: center;
}

.section-intro {
    text-align: center;
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

/* 痛点呈现 */
.pain-points {
    background: var(--bg-light);
    padding: 5rem 0;
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.pain-item {
    background: #fff;
    padding: 2.5rem 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    text-align: center;
    transition: transform 0.3s ease;
}

.pain-item:hover {
    transform: translateY(-5px);
}

.pain-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.pain-item h3 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.pain-item p {
    color: var(--text-light);
    line-height: 1.6;
}

/* 解决方案 */
.solution {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
}

.solution-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.feature-card {
    background: #fff;
    padding: 2.5rem;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--accent-blue);
    box-shadow: 0 8px 25px rgba(10,31,61,0.1);
    transform: translateY(-3px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.4rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.7;
}

/* 检测流程 */
.process {
    background: var(--primary-blue);
    color: #fff;
    padding: 5rem 0;
}

.process h2,
.process .section-intro {
    color: #fff;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.step-item {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.2);
    text-align: center;
}

.step-number {
    width: 60px;
    height: 60px;
    background: var(--orange-accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 auto 1.5rem;
}

.step-item h3 {
    font-size: 1.3rem;
    color: #fff;
    margin-bottom: 1rem;
}

.step-item p {
    color: rgba(255,255,255,0.9);
    line-height: 1.7;
}

.demo-link {
    text-align: center;
    margin-top: 3rem;
}

.demo-btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: rgba(255,255,255,0.2);
    color: #fff;
    text-decoration: none;
    border-radius: 8px;
    border: 2px solid rgba(255,255,255,0.3);
    transition: all 0.3s ease;
}

.demo-btn:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

/* 价格 */
.pricing {
    padding: 5rem 0;
    background: var(--bg-light);
}

.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    padding: 3rem;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    text-align: center;
}

.price-main {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
}

.price-amount {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-blue);
    line-height: 1;
}

.price-unit {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

.price-features {
    list-style: none;
    text-align: left;
    margin: 2rem 0;
}

.price-features li {
    padding: 0.8rem 0;
    color: var(--text-dark);
    font-size: 1.05rem;
}

.pricing-card .cta-btn {
    width: 100%;
    margin-top: 2rem;
}

/* 优势 */
.advantages {
    padding: 5rem 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.advantage-item {
    padding: 2rem;
    background: var(--bg-light);
    border-radius: 12px;
    border-left: 4px solid var(--accent-blue);
}

.advantage-item h3 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.advantage-item p {
    color: var(--text-light);
    line-height: 1.7;
}

/* 产品对比 */
.comparison {
    padding: 5rem 0;
    background: var(--bg-light);
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-top: 3rem;
}

.comparison-table {
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    border-collapse: collapse;
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.comparison-table th {
    background: var(--primary-blue);
    color: #fff;
    padding: 1.2rem;
    text-align: left;
    font-weight: 600;
}

.comparison-table td {
    padding: 1.2rem;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.comparison-table tr:nth-child(even) {
    background: var(--bg-light);
}

/* FAQ */
.faq {
    padding: 5rem 0;
}

.faq-list {
    max-width: 900px;
    margin: 3rem auto 0;
}

.faq-list dt {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-blue);
    padding: 1.5rem;
    background: var(--bg-light);
    border-left: 4px solid var(--accent-blue);
    margin-top: 1rem;
    cursor: pointer;
    border-radius: 8px;
}

.faq-list dd {
    padding: 1.5rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-left: 0;
    border-bottom: 1px solid var(--border-color);
}

/* 用户评价 */
.testimonials {
    padding: 5rem 0;
    background: var(--bg-light);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.testimonial-item {
    background: #fff;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.testimonial-content {
    margin-bottom: 2rem;
}

.testimonial-content p {
    color: var(--text-dark);
    line-height: 1.7;
    font-style: italic;
    font-size: 1.05rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-blue);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.author-name {
    font-weight: 600;
    color: var(--primary-blue);
}

.author-title {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 使用场景 */
.use-cases {
    padding: 5rem 0;
    background: var(--bg-light);
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.use-case-item {
    background: #fff;
    padding: 2.5rem;
    border-radius: 12px;
    border-top: 4px solid var(--accent-blue);
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
}

.use-case-item h3 {
    font-size: 1.4rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

.use-case-item p {
    color: var(--text-light);
    line-height: 1.7;
}

/* 注意事项 */
.notes {
    padding: 5rem 0;
}

.notes-content {
    max-width: 900px;
    margin: 3rem auto 0;
    background: var(--bg-light);
    padding: 3rem;
    border-radius: 12px;
}

.notes-content h3 {
    font-size: 1.3rem;
    color: var(--primary-blue);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.notes-content h3:first-child {
    margin-top: 0;
}

.notes-content p {
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.notes-content ul {
    list-style: none;
    padding-left: 0;
}

.notes-content li {
    padding: 0.8rem 0;
    padding-left: 1.5rem;
    color: var(--text-light);
    line-height: 1.7;
    position: relative;
}

.notes-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-blue);
    font-weight: bold;
}

/* 合作伙伴 */
.partners {
    padding: 5rem 0;
    background: var(--bg-light);
}

.partners-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 3rem;
    margin-top: 3rem;
}

.partners-logos img {
    opacity: 0.7;
    transition: opacity 0.3s ease;
    filter: grayscale(100%);
}

.partners-logos img:hover {
    opacity: 1;
    filter: grayscale(0%);
}

/* 底部CTA */
.final-cta {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: #fff;
    padding: 5rem 0;
    text-align: center;
}

.final-cta h2 {
    color: #fff;
    margin-bottom: 1rem;
}

.final-cta p {
    font-size: 1.2rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.cta-group {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background: var(--primary-blue);
    color: #fff;
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    color: #fff;
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.footer-section p {
    color: rgba(255,255,255,0.8);
    line-height: 1.7;
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: rgba(255,255,255,0.9);
    text-decoration: none;
}

.footer-section a:hover {
    text-decoration: underline;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.2);
    color: rgba(255,255,255,0.7);
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--accent-blue);
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: all 0.3s ease;
    z-index: 1000;
}

.back-to-top:hover {
    background: var(--primary-blue);
    transform: translateY(-3px);
}

.back-to-top.show {
    display: flex;
}