/* 产品介绍页面样式 */
.landing-page {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    /*background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);*/
    min-height: 100vh;
    color: #333;
    padding-top: 80px; /* 为固定导航栏留出空间 */
}

/* 顶部固定导航 */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(30, 60, 114, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 2000;
    height: 80px;
    width: 100%;
    overflow: visible;
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    transform: none;
    transition: none;
}

.nav-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    overflow: visible;
    box-sizing: border-box;
}

/* 导航栏三栏布局 */
.nav-left {
    display: flex;
    align-items: center;
}

.nav-center {
    display: flex;
    align-items: center;
    flex: 1;
    justify-content: center;
}

.nav-right {
    display: flex;
    align-items: center;
    position: relative;
}

.nav-logo .logo-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.nav-logo {
    transition: all 0.3s ease;
}

    .nav-logo:hover {
        transform: scale(1.05);
        opacity: 0.9;
    }

/* 桌面端菜单 */
.nav-menu-desktop {
    display: flex;
    gap: 30px;
    font-size: 1rem;
    align-items: center;
}

.nav-contact {
    display: flex;
    align-items: center;
    gap: 8px;
    color: white;
    font-weight: 500;
}

/* 移动端菜单 */
.nav-menu {
    display: none;
}

.contact-phone {
    font-size: 1.1rem;
    font-weight: 600;
}

.contact-wechat {
    font-size: 0.9rem;
    opacity: 0.9;
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 8px;
    border-radius: 12px;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    padding: 10px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
    display: inline-block;
}

    .nav-link:hover {
        background: rgba(255, 255, 255, 0.1);
        transform: translateY(-2px);
    }

.nav-link {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
}

.hero-section {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

    .hero-section::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="white" opacity="0.1"><polygon points="0,0 1000,100 1000,0"/></svg>');
        background-size: cover;
    }

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 60px;
    text-align: left;
}

.hero-text-content {
    flex: 1.2;
}

.hero-image-content {
    flex: 1;
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 25px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    line-height: 1.2;
    color: #ffffff;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 0;
    opacity: 0.95;
    max-width: 100%;
    margin-left: 0;
    margin-right: 0;
    line-height: 1.7;
    color: #e8f4fd;
    font-weight: 400;
}

.hero-buttons {
    margin-top: 40px;
    display: flex;
    gap: 20px;
    align-items: center;
}

.btn-primary {
    display: inline-block;
    padding: 15px 35px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
    border: none;
}

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 15px 35px rgba(102, 126, 234, 0.4);
        background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    }

.btn-secondary {
    display: inline-block;
    padding: 8px 22px;
    background: transparent;
    color: #e8f4fd;
    text-decoration: none;
    border-radius: 25px;
    font-size: .9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid rgba(232, 244, 253, 0.5);
}

    .btn-secondary:hover {
        background: rgba(232, 244, 253, 0.1);
        border-color: rgba(232, 244, 253, 0.8);
        color: #ffffff;
    }

.product-image {
    width: 100%;
    max-width: 400px;
    height: auto;
    margin: 0;
}

.features-section {
    background: white;
    padding: 60px 0;
}

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

.section-title {
    text-align: center;
    font-size: 2rem;
    color: #1e3c72;
    margin-bottom: 50px;
    font-weight: 600;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.feature-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e1e8ed;
}

    .feature-card:not(.core-feature) .feature-icon {
        background: white;
        color: #1e3c72;
        border: 2px solid #1e3c72;
    }

    .feature-card:hover {
        transform: translateY(-5px);
        box-shadow: 0 15px 30px rgba(0,0,0,0.1);
    }

.simple-feature {
    background: #fcfcfc;
    border: 1px solid #f0f0f0;
}

    .simple-feature:hover {
        transform: none;
        box-shadow: none;
    }

    .simple-feature .feature-icon {
        background: #f5f5f5;
        color: #9ca3af;
        border: 1px solid #f0f0f0;
    }

    .simple-feature .feature-title {
        color: #9ca3af;
    }

    .simple-feature .feature-description {
        color: #a1a1aa;
    }

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 24px;
}

.core-feature .feature-icon {
    background: white;
    color: #667eea;
}

.feature-title {
    font-size: 1.3rem;
    color: #1e3c72;
    margin-bottom: 15px;
    font-weight: 600;
}

.feature-description {
    color: #666;
    line-height: 1.6;
}

.core-feature {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

    .core-feature::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -50%;
        width: 200%;
        height: 200%;
        background: repeating-linear-gradient( 45deg, transparent, transparent 10px, rgba(255,255,255,0.1) 10px, rgba(255,255,255,0.1) 20px );
        animation: slide 20s linear infinite;
    }

@keyframes slide {
    0% {
        transform: translate(-50%, -50%) rotate(45deg);
    }

    100% {
        transform: translate(-50%, -50%) rotate(45deg) translate(20px, 20px);
    }
}

.core-feature .feature-title {
    color: white;
}

.core-feature .feature-description {
    color: rgba(255,255,255,0.9);
}

.pricing-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 60px 0;
    color: white;
}

    .pricing-section .section-title {
        color: white;
    }

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.pricing-card {
    background: rgba(255,255,255,0.95);
    color: #333;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    position: relative;
    transition: transform 0.3s ease;
    backdrop-filter: blur(10px);
}

    .pricing-card:hover {
        transform: scale(1.05);
    }

    .pricing-card.featured {
        border: 3px solid #667eea;
        transform: scale(1.05);
    }

        .pricing-card.featured::before {
            content: '推荐';
            position: absolute;
            top: -15px;
            left: 50%;
            transform: translateX(-50%);
            background: #667eea;
            color: white;
            padding: 5px 20px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
        }

.plan-name {
    font-size: 1.4rem;
    color: #1e3c72;
    margin-bottom: 2px;
    font-weight: 600;
}

.plan-price {
    font-size: 2.5rem;
    color: #667eea;
    font-weight: 700;
    margin-bottom: 10px;
}

.price-unit {
    font-size: 1rem;
    font-weight: normal;
}

.plan-description {
    color: #666;
    margin-bottom: 20px;
    line-height: 1.5;
}

.plan-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

    .plan-features li {
        padding: 8px 0;
        color: #555;
        position: relative;
        padding-left: 25px;
        display: inline-block;
        margin-right: .5rem;
    }

        .plan-features li::before {
            content: '✓';
            position: absolute;
            left: .5rem;
            color: #4CAF50;
            font-weight: bold;
        }

.free-notice {
    background: rgba(255,255,255,0.9);
    color: #333;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    margin-top: 30px;
    backdrop-filter: blur(10px);
}

    .free-notice h3 {
        color: #1e3c72;
        margin-bottom: 15px;
        font-size: 1.3rem;
    }

    .free-notice p {
        margin: 10px 0;
        line-height: 1.6;
    }

.tip {
    background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 100%);
    padding: 15px;
    border-radius: 10px;
    margin-top: 15px;
    border-left: 4px solid #fdcb6e;
}

.flexibility-note {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #666;
}

.footer {
    background: #1e3c72;
    color: #66aaef;
    text-align: center;
    padding: 10px 0;
}

/* 回到顶部按钮样式 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: bold;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    transition: all 0.3s ease;
    z-index: 1001;
}

    .back-to-top:hover {
        transform: translateY(-3px);
        box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
        background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
    }

    .back-to-top:active {
        transform: translateY(-1px);
    }

.back-to-top-icon {
    display: block;
    line-height: 1;
}

/* 汉堡菜单样式 */
.hamburger-menu {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 3000;
}

.hamburger-icon {
    width: 25px;
    height: 3px;
    background-color: white;
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* 移动端联系信息默认隐藏 */
.nav-contact-mobile {
    display: none;
    flex-direction: column;
    gap: 10px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .landing-page {
        padding-top: 70px; /* 移动端导航栏高度调整 */
    }

    .top-nav {
        height: 70px;
    }

    .nav-container {
        padding: 0 15px;
        position: relative;
    }

    .nav-logo .logo-text {
        font-size: 1.2rem;
    }

    /* 显示汉堡菜单 */
    .hamburger-menu {
        display: flex;
    }

    /* 隐藏桌面端菜单和联系信息 */
    .nav-menu-desktop {
        display: none;
    }

    .nav-contact {
        display: none;
    }

    /* 移动端导航菜单样式 */
    .nav-menu {
        position: absolute;
        top: 100%;
        right: 0;
        left: auto;
        background: rgba(30, 60, 114, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        gap: 0;
        width: 200px;
        border-radius: 0 0 0 15px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.3s ease;
        z-index: 1000;
        /* 确保菜单不会超出屏幕右侧 */
        max-width: calc(100vw - 20px);
        right: 10px;
        display: flex;
    }

    /* 激活状态显示菜单 */
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    /* 移动端导航链接样式 */
    .nav-menu .nav-link {
        display: block;
        padding: 15px 20px;
        font-size: 1rem;
        border-radius: 0;
        transition: all 0.3s ease;
        text-align: left;
    }

    /* 显示移动端联系信息 */
    .nav-contact-mobile {
        display: flex;
        padding: 15px 20px;
        flex-direction: column;
        gap: 10px;
        margin-top: 10px;
        padding-top: 10px;
        border-top: 1px solid rgba(255, 255, 255, 0.2);
    }

    /* 移动端联系信息样式 */
    .nav-contact-mobile {
        color: white !important;
    }

    .nav-contact-mobile .contact-phone {
        font-size: 1rem;
        color: white !important;
        text-decoration: none !important;
    }

    .nav-contact-mobile .contact-wechat {
        font-size: 0.9rem;
        color: white !important;
        background: rgba(255, 255, 255, 0.1);
        padding: 5px 12px;
        border-radius: 15px;
        display: inline-block;
        width: fit-content;
        text-decoration: underline !important;
    }

    .nav-contact-mobile .contact-phone-link {
        font-size: 1rem;
        color: white !important;
        text-decoration: none !important;
        background: rgba(255, 255, 255, 0.1);
        padding: 5px 12px;
        border-radius: 15px;
        display: inline-block;
        width: fit-content;
    }

    .hero-content {
        flex-direction: column;
        gap: 30px;
        text-align: center;
    }

    .hero-text-content,
    .hero-image-content {
        flex: none;
        width: 100%;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }

    .btn-primary,
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .product-image {
        max-width: 300px;
    }

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

    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        transform: none;
    }

    .container {
        padding: 0 15px;
    }

    .hero-section,
    .features-section,
    .pricing-section {
        padding: 40px 0;
    }

    .footer {
        padding: 15px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .feature-card,
    .pricing-card {
        padding: 20px;
    }

    .footer {
        padding: 12px 0;
    }

    /* 移动端回到顶部按钮样式 */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 18px;
    }
}

/* 页面滚动行为 */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px; /* 调整锚点滚动位置，让内容稍微往上一点 */
}

/* 为旧浏览器提供备用方案 */
#features {
    scroll-margin-top: 80px;
}

#pricing {
    scroll-margin-top: 80px;
}

#comparison {
    scroll-margin-top: 80px;
}

/* 动画效果 */
.feature-card, .pricing-card, .comparison-card {
    animation: fadeInUp 0.6s ease-out;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 为不同的卡片添加延迟动画 */
.feature-card:nth-child(1) {
    animation-delay: 0.1s;
}

.feature-card:nth-child(2) {
    animation-delay: 0.2s;
}

.feature-card:nth-child(3) {
    animation-delay: 0.3s;
}

.feature-card:nth-child(4) {
    animation-delay: 0.4s;
}

.feature-card:nth-child(5) {
    animation-delay: 0.5s;
}

.pricing-card:nth-child(1) {
    animation-delay: 0.1s;
}

.pricing-card:nth-child(2) {
    animation-delay: 0.2s;
}

.comparison-card:nth-child(1) {
    animation-delay: 0.1s;
}

.comparison-card:nth-child(2) {
    animation-delay: 0.2s;
}

.comparison-card:nth-child(3) {
    animation-delay: 0.3s;
}

/* 竞品对比区域样式 */
.comparison-section {
    background: #f8f9fa;
    padding: 60px 0;
}

.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.comparison-card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e1e8ed;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.comparison-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0,0,0,0.1);
}

.comparison-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 24px;
}

.comparison-title {
    font-size: 1.3rem;
    color: #1e3c72;
    margin-bottom: 15px;
    font-weight: 600;
}

.comparison-description {
    color: #666;
    line-height: 1.6;
}