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

:root {
    --primary-color: #0066FF;
    --secondary-color: #0052CC;
    --dark-bg: #0a0a0a;
    --light-bg: #f8f9fa;
    --text-dark: #1a1a1a;
    --text-light: #6c757d;
    --white: #ffffff;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #0066FF 0%, #00A8FF 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-dark);
    font-size: 24px;
    font-weight: bold;
    gap: 10px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

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

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

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

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Hero区域 */
.hero {
    padding: 150px 0 100px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero-text h1 {
    font-size: 42px;
    line-height: 1.3;
    margin-bottom: 25px;
    color: var(--text-dark);
}

.hero-text p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 20px;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 40px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px 30px;
    border-radius: 12px;
    text-decoration: none;
    color: var(--white);
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.download-btn.android {
    background: linear-gradient(135deg, #3DDC84 0%, #26A65B 100%);
}

.download-btn.ios {
    background: linear-gradient(135deg, #555555 0%, #000000 100%);
}

.download-btn.windows {
    background: linear-gradient(135deg, #00A4EF 0%, #0078D4 100%);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}

.download-btn svg {
    flex-shrink: 0;
}

.download-btn div {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.btn-label {
    font-size: 12px;
    opacity: 0.9;
}

.btn-subtitle {
    font-size: 16px;
    font-weight: 600;
}

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

.phone-mockup {
    animation: float 3s ease-in-out infinite;
}

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

/* 安全性能区域 */
.security {
    padding: 100px 0 30px;
    background: var(--white);
}

.security h2 {
    text-align: center;
    font-size: 42px;
    margin-bottom: 60px;
    color: var(--text-dark);
}

.security-content p {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-light);
    text-align: center;
    margin-bottom: 60px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.security-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.security-item {
    background: var(--light-bg);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s ease;
}

.security-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow);
}

.security-item .icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.security-item p {
    font-size: 16px;
    color: var(--text-dark);
    line-height: 1.6;
}

/* 客户认可区域 */
.testimonials {
    padding: 60px 0 100px;
    background: var(--white);
}

.testimonials h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 60px;
    color: var(--text-dark);
    font-weight: 600;
}

.testimonial-carousel {
    position: relative;
    max-width: 1400px;
    margin: 0 auto 60px;
    padding: 0 80px;
    overflow: hidden;
}

.testimonial-slides {
    display: flex;
    gap: 30px;
    transition: transform 0.5s ease-in-out;
}

.testimonial-card {
    background: var(--white);
    border-radius: 16px;
    padding: 35px 30px;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    gap: 20px;
    transition: all 0.3s ease;
    flex: 0 0 calc(33.333% - 20px);
    min-height: 260px;
}

.testimonial-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.testimonial-card[data-link] {
    cursor: pointer;
}

.testimonial-card[data-link]:hover {
    background: #fafafa;
    border: 1px solid #e0e0e0;
}

.testimonial-top {
    display: flex;
    flex-direction: row;
    gap: 20px;
    flex: 1;
}

.testimonial-logo {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background: #fafafa;
    border-radius: 8px;
    padding: 8px;
    border: 1px solid #f0f0f0;
}

.testimonial-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.testimonial-content {
    flex: 1;
    display: flex;
    align-items: flex-start;
    min-width: 0;
}

.testimonial-content p {
    font-size: 14px;
    line-height: 1.8;
    color: #555;
    margin: 0;
    text-align: justify;
}

.testimonial-company {
    font-size: 14px;
    color: #666;
    font-weight: 400;
    padding-top: 18px;
    border-top: 1px solid #eee;
    text-align: right;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--white);
    border: 1px solid #ddd;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    color: #666;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.carousel-btn:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.3);
}

.carousel-btn.prev {
    left: 0;
}

.carousel-btn.next {
    right: 0;
}

.carousel-btn svg {
    width: 20px;
    height: 20px;
}

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

.partners-image {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 0;
    box-shadow: none;
    display: block;
}

/* 加密介绍区域 */
.encryption {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

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

.section-header h2 {
    font-size: 42px;
    margin-bottom: 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.feature-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 40px;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.15);
}

.feature-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
}

.feature-card p {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
    opacity: 0.9;
}

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

.feature-card li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    font-size: 15px;
}

.feature-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #3DDC84;
    font-weight: bold;
}

/* 下载区域 */
.download-section {
    padding: 100px 0;
    background: var(--light-bg);
}

.download-section h2 {
    text-align: center;
    font-size: 42px;
    margin-bottom: 60px;
    color: var(--text-dark);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.download-card {
    background: var(--white);
    padding: 50px 30px;
    border-radius: 20px;
    text-align: center;
    text-decoration: none;
    color: var(--text-dark);
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

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

.download-card.android svg {
    color: #3DDC84;
}

.download-card.ios svg {
    color: #555555;
}

.download-card.windows svg {
    color: #00A4EF;
}

.download-card h3 {
    font-size: 20px;
    margin: 20px 0 10px;
}

.download-card p {
    font-size: 16px;
    color: var(--text-light);
}

/* FAQ区域 */
.faq {
    padding: 100px 0;
    background: var(--white);
}

.faq h2 {
    text-align: center;
    font-size: 42px;
    margin-bottom: 60px;
    color: var(--text-dark);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--light-bg);
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: var(--shadow);
}

.faq-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--text-dark);
}

.faq-item p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
}

/* 页脚 */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-about h3 {
    font-size: 24px;
    margin-bottom: 15px;
}

.footer-about p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.footer-column h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--white);
}

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

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-contact h4 {
    font-size: 18px;
    margin-bottom: 15px;
}

.footer-contact p {
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact strong {
    color: var(--primary-color);
}

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

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
}

/* 通知提示框 */
.notification {
    position: fixed;
    top: 100px;
    right: 30px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    padding: 20px 25px;
    z-index: 9999;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    max-width: 400px;
    min-width: 300px;
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.notification-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.notification-message {
    font-size: 16px;
    color: var(--text-dark);
    line-height: 1.5;
}

.notification-info {
    border-left: 4px solid var(--primary-color);
}

.notification-success {
    border-left: 4px solid #3DDC84;
}

.notification-warning {
    border-left: 4px solid #FFA726;
}

.notification-error {
    border-left: 4px solid #EF5350;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .hero-image {
        order: -1;
    }

    .phone-mockup svg {
        width: 200px;
        height: 400px;
    }

    .security h2,
    .testimonials h2,
    .encryption h2,
    .download-section h2,
    .faq h2 {
        font-size: 28px;
    }

    .testimonial-carousel {
        padding: 0 55px;
        overflow: hidden;
    }

    .testimonial-slides {
        flex-direction: column;
        transform: none !important;
    }

    .testimonial-card {
        flex: 0 0 100%;
        width: 100%;
        min-height: auto;
        gap: 15px;
    }

    .testimonial-top {
        flex-direction: column;
        gap: 15px;
    }

    .testimonial-logo {
        margin: 0 auto;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
    }

    .carousel-btn svg {
        width: 18px;
        height: 18px;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 60px;
    }

    .download-buttons {
        gap: 10px;
    }

    .download-btn {
        padding: 12px 20px;
    }

    .btn-subtitle {
        font-size: 14px;
    }

    .security,
    .testimonials,
    .encryption,
    .download-section,
    .faq {
        padding: 60px 0;
    }

    .testimonial-carousel {
        padding: 0 50px;
    }

    .testimonial-card {
        padding: 25px 20px;
        min-height: auto;
        gap: 12px;
    }

    .testimonial-top {
        flex-direction: column;
        gap: 12px;
    }

    .testimonial-logo {
        width: 40px;
        height: 40px;
        margin: 0 auto;
    }

    .testimonial-content p {
        font-size: 13px;
        text-align: justify;
    }

    .testimonial-company {
        text-align: center;
        font-size: 13px;
    }

    .carousel-btn {
        width: 38px;
        height: 38px;
    }

    .carousel-btn svg {
        width: 16px;
        height: 16px;
    }

    .partners-section {
        padding: 0 15px;
    }

    .footer {
        padding: 60px 0 20px;
    }

    .notification {
        right: 20px;
        left: 20px;
        min-width: auto;
        max-width: none;
    }
}