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

:root {
    --primary-color: #00d4ff;
    --primary-hover: #00b8e6;
    --secondary-color: #7c3aed;
    --accent-color: #ff006e;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    --bg-dark: #0a0a0a;
    --bg-darker: #050505;
    --bg-card: #111111;
    --bg-card-hover: #1a1a1a;
    --bg-white: #1a1a1a;
    --bg-light: #111111;
    --border-color: #262626;
    --border-hover: #404040;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);
    --transition: all 0.3s ease;
}

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

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

/* 导航栏 */
.navbar {
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

.nav-brand h1 {
    font-size: 1.5rem;
    color: var(--text-primary);
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* Hero 区域 */
.hero {
    background-image: url('banner.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
    padding: 120px 0;
    min-height: 700px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.85) 0%, rgba(10, 10, 10, 0.9) 50%, rgba(0, 0, 0, 0.85) 100%);
    z-index: 1;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(124, 58, 237, 0.15) 0%, transparent 50%);
    z-index: 1;
    pointer-events: none;
}

.hero .container {
    position: relative;
    z-index: 2;
}


.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    background: linear-gradient(135deg, #ffffff 0%, var(--primary-color) 50%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.35rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.hero-version {
    font-size: 0.9rem;
    opacity: 0.8;
}

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

.hero-image-wrapper {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform 0.3s ease;
}

.hero-image-wrapper:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg) scale(1.05);
}

.hero-main-image {
    width: 100%;
    max-width: 600px;
    height: auto;
    display: block;
    border-radius: 16px;
}

.hero-image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    border-radius: 16px;
    pointer-events: none;
}

/* 按钮样式 */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border: 1px solid rgba(0, 212, 255, 0.3);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--secondary-color));
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow), var(--shadow-md);
    border-color: var(--primary-color);
}

.btn-large {
    padding: 16px 32px;
    font-size: 1.1rem;
}

.btn-download {
    width: 100%;
    justify-content: center;
    margin-top: 1rem;
}

/* 功能展示区域 */
.features {
    padding: 100px 0;
    background: var(--bg-darker);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.section-title {
    text-align: center;
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 4rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
    width: 100%;
    letter-spacing: -0.02em;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: var(--bg-card);
    padding: 0;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
    overflow: hidden;
    position: relative;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 212, 255, 0.2);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-image-wrapper {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.feature-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.feature-card:hover .feature-image {
    transform: scale(1.1);
}

.feature-icon {
    font-size: 3rem;
    margin: 1rem 0;
    position: relative;
    z-index: 1;
}

.feature-card h3 {
    padding: 0 2rem;
}

.feature-card p {
    padding: 0 2rem 2rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 700;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.95rem;
}

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

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.download-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: 20px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.download-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition);
}

.download-card:hover::before {
    opacity: 1;
}

.download-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg), 0 0 40px rgba(0, 212, 255, 0.3);
    transform: translateY(-8px);
    background: var(--bg-card-hover);
}

.platform-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--bg-card-hover), var(--bg-card));
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.download-card:hover .platform-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-md);
    border-color: var(--primary-color);
}

.platform-icon.windows {
    color: #0078d4;
}

.platform-icon.mac {
    color: #000000;
}

.download-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.platform-version {
    font-size: 1.1rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.platform-size,
.platform-requirements {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.download-info {
    text-align: center;
    padding: 2rem;
    background: var(--bg-card);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    margin-top: 2rem;
    box-shadow: var(--shadow-sm);
}

.download-info-content {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    max-width: 800px;
    margin: 0 auto;
    text-align: left;
}

.download-info-icon {
    width: 80px;
    height: 80px;
    border-radius: 12px;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.download-info-text {
    flex: 1;
}

.download-info-text p {
    margin-bottom: 0.5rem;
}

.download-security {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.download-info a {
    color: var(--primary-color);
    text-decoration: none;
}

.download-info a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    .download-info-content {
        flex-direction: column;
        text-align: center;
    }
}

/* 更新日志 */
.updates {
    padding: 100px 0;
    background: var(--bg-darker);
    position: relative;
}

.updates::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

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

.update-item {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 16px;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary-color);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.update-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.update-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.update-version {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.update-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.update-changes {
    list-style: none;
    padding-left: 0;
}

.update-changes li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
    padding-left: 1rem;
    position: relative;
}

.update-changes li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-size: 0.8rem;
}

.update-changes li:hover {
    color: var(--text-primary);
    padding-left: 1.5rem;
}

.update-changes li:last-child {
    border-bottom: none;
}

/* 用户评价 */
.testimonials {
    padding: 100px 0;
    background: var(--bg-dark);
    position: relative;
}

.testimonials::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.testimonial-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.testimonial-rating {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.testimonial-text {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-style: italic;
}

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

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 1.2rem;
    overflow: hidden;
    flex-shrink: 0;
    border: 2px solid var(--primary-color);
    box-shadow: 0 0 15px rgba(0, 212, 255, 0.3);
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

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

/* 产品展示区域 */
.showcase {
    padding: 100px 0;
    background: var(--bg-darker);
    position: relative;
}

.showcase::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.showcase-content {
    max-width: 1200px;
    margin: 0 auto;
}

.showcase-image-wrapper {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: transform 0.3s ease;
}

.showcase-image-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1) 0%, rgba(124, 58, 237, 0.1) 100%);
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
    pointer-events: none;
}

.showcase-image-wrapper:hover::before {
    opacity: 1;
}

.showcase-image-wrapper:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg), 0 0 50px rgba(0, 212, 255, 0.3);
    border-color: var(--primary-color);
}

.showcase-image {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 20px;
}

.showcase-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.3) 100%);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 2rem;
    border-radius: 20px;
}

.showcase-badge {
    background: rgba(17, 17, 17, 0.9);
    color: var(--primary-color);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 212, 255, 0.3);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

/* 多端同步 */
.sync {
    padding: 100px 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0.95) 0%, rgba(10, 10, 10, 0.98) 50%, rgba(0, 0, 0, 0.95) 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

.sync::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(124, 58, 237, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.sync::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

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

.sync-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.sync-text h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.sync-text p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    line-height: 1.8;
}

.sync-features {
    list-style: none;
    font-size: 1.1rem;
}

.sync-features li {
    padding: 0.5rem 0;
}

.sync-devices {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    align-items: center;
}

.device-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    background: rgba(17, 17, 17, 0.8);
    padding: 1.5rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease;
    position: relative;
    overflow: hidden;
}

.device-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(124, 58, 237, 0.1));
    opacity: 0;
    transition: var(--transition);
}

.device-item:hover::before {
    opacity: 1;
}

.device-item:hover {
    transform: translateY(-10px) scale(1.05);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.3);
}

.device-image {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.device-label {
    color: white;
    font-weight: 600;
    font-size: 1rem;
}

/* 帮助中心 */
.help {
    padding: 100px 0;
    background: var(--bg-dark);
    position: relative;
}

.help::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

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

.help-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.help-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.help-card h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.help-list {
    list-style: none;
}

.help-list li {
    margin-bottom: 0.8rem;
}

.help-list a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    padding: 0.5rem 0;
    position: relative;
    padding-left: 1rem;
}

.help-list a::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    opacity: 0;
    transition: var(--transition);
}

.help-list a:hover {
    color: var(--primary-color);
    padding-left: 1.5rem;
}

.help-list a:hover::before {
    opacity: 1;
}

/* 页脚 */
.footer {
    background: var(--bg-darker);
    color: white;
    padding: 4rem 0 1.5rem;
    border-top: 1px solid var(--border-color);
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

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

.footer-section ul li {
    margin-bottom: 0.5rem;
}

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

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* 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(10px);
}

.modal-content {
    background: var(--bg-card);
    margin: 15% auto;
    padding: 2rem;
    border-radius: 20px;
    border: 1px solid var(--border-color);
    max-width: 500px;
    position: relative;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

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

.modal-close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

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

.modal-content h2 {
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.modal-progress {
    width: 100%;
    height: 8px;
    background: var(--bg-dark);
    border-radius: 4px;
    overflow: hidden;
    margin: 1rem 0;
    border: 1px solid var(--border-color);
}

.progress-bar {
    height: 100%;
    background: var(--primary-color);
    width: 0%;
    transition: width 0.3s ease;
    animation: progressAnimation 2s infinite;
}

@keyframes progressAnimation {
    0% {
        width: 0%;
    }
    50% {
        width: 70%;
    }
    100% {
        width: 100%;
    }
}

.modal-tip {
    font-size: 0.9rem;
}

.modal-tip a {
    color: var(--primary-color);
    text-decoration: none;
}

.modal-tip a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--bg-card);
        border: 1px solid var(--border-color);
        width: 100%;
        text-align: center;
        transition: var(--transition);
        box-shadow: var(--shadow-md);
        padding: 2rem 0;
    }

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

    .nav-toggle {
        display: flex;
    }

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

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

    .hero-buttons {
        justify-content: center;
    }

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

    .hero-image-wrapper {
        transform: none;
    }

    .hero-image-wrapper:hover {
        transform: scale(1.02);
    }

    .showcase-image-wrapper:hover {
        transform: none;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid,
    .download-cards,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .hero-main-image {
        max-width: 100%;
    }

    .feature-image-wrapper {
        height: 180px;
    }

    .sync-devices {
        gap: 1rem;
    }

    .device-image {
        width: 80px;
        height: 80px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

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

    .btn-large {
        padding: 12px 24px;
        font-size: 1rem;
    }

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

    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 选中文本样式 */
::selection {
    background: var(--primary-color);
    color: white;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* 添加一些动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.download-card,
.testimonial-card,
.update-item,
.help-card {
    animation: fadeInUp 0.6s ease-out;
}

/* 增强按钮样式 */
.btn {
    position: relative;
    overflow: hidden;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* 增强卡片阴影效果 */
.feature-card,
.download-card,
.testimonial-card,
.update-item,
.help-card {
    backdrop-filter: blur(10px);
}