@charset "UTF-8";

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: #ffffff;
    color: #333333;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: #333333;
    -webkit-tap-highlight-color: transparent;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: bold;
    color: #ff6b35;
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

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

.nav-menu li a {
    font-size: 16px;
    color: #555555;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu li a:hover {
    color: #ff6b35;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #ff6b35;
    transition: width 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #333333;
}

.banner {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #fff5f0 0%, #ffffff 100%);
}

.banner .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 60px;
}

.banner-content h1 {
    font-size: 48px;
    font-weight: bold;
    color: #ff6b35;
    margin-bottom: 15px;
    text-shadow: 2px 2px 0 rgba(255, 107, 53, 0.1);
}

.banner-content p {
    font-size: 20px;
    color: #555555;
    margin-bottom: 10px;
}

.banner-content .sub-title {
    font-size: 16px;
    color: #888888;
    margin-bottom: 30px;
}

.banner-buttons {
    display: flex;
    gap: 20px;
}

.btn-primary {
    display: inline-block;
    padding: 15px 40px;
    background: linear-gradient(135deg, #ff6b35 0%, #ff8c5a 100%);
    color: #ffffff;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
    display: inline-block;
    padding: 15px 40px;
    background-color: transparent;
    color: #ff6b35;
    border: 2px solid #ff6b35;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background-color: #ff6b35;
    color: #ffffff;
}

.banner-image img {
    width: 300px;
    height: 300px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.2);
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: bold;
    color: #333333;
    margin-bottom: 15px;
}

.section-header p {
    font-size: 16px;
    color: #888888;
}

.features {
    padding: 80px 0;
    background-color: #fafafa;
}

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

.feature-card {
    background-color: #ffffff;
    padding: 40px 30px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.15);
}

.feature-card i {
    font-size: 48px;
    color: #ff6b35;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: bold;
    color: #333333;
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 14px;
    color: #888888;
    line-height: 1.8;
}

.screenshots {
    padding: 80px 0;
}

.screenshots-scroll {
    overflow-x: auto;
    white-space: nowrap;
    padding-bottom: 20px;
}

.screenshots-scroll::-webkit-scrollbar {
    height: 8px;
}

.screenshots-scroll::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.screenshots-scroll::-webkit-scrollbar-thumb {
    background: #ff6b35;
    border-radius: 4px;
}

.screenshots-scroll::-webkit-scrollbar-thumb:hover {
    background: #ff8c5a;
}

.screenshots-list {
    display: inline-flex;
    gap: 20px;
    padding: 0 5px;
}

.screenshot-item {
    flex-shrink: 0;
    width: 280px;
    height: 450px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.screenshot-item:hover {
    transform: scale(1.05);
}

.screenshot-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.download {
    padding: 80px 0;
    background: linear-gradient(135deg, #fff5f0 0%, #ffffff 100%);
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    max-width: 700px;
    margin: 0 auto;
}

.download-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 30px;
    background-color: #ffffff;
    border-radius: 20px;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
}

.download-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(255, 107, 53, 0.2);
}

.download-card img {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
}

.download-card.android img {
    filter: hue-rotate(120deg);
}

.download-card.apple img {
    filter: grayscale(100%);
}

.download-card h3 {
    font-size: 24px;
    font-weight: bold;
    color: #333333;
    margin-bottom: 10px;
}

.download-card p {
    font-size: 14px;
    color: #888888;
    margin-bottom: 20px;
}

.download-btn {
    display: inline-block;
    padding: 12px 35px;
    background: linear-gradient(135deg, #ff6b35 0%, #ff8c5a 100%);
    color: #ffffff;
    border-radius: 25px;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
}

.download-card:hover .download-btn {
    transform: scale(1.1);
}

.reviews {
    padding: 80px 0;
    background-color: #fafafa;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.review-card {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 20px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(255, 107, 53, 0.1);
}

.reviewer-info {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.reviewer-avatar {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #ff6b35 0%, #ff8c5a 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.reviewer-avatar i {
    font-size: 24px;
    color: #ffffff;
}

.reviewer-name {
    font-size: 16px;
    font-weight: bold;
    color: #333333;
    display: block;
    margin-bottom: 5px;
}

.star-rating {
    display: flex;
    gap: 3px;
}

.star-rating i {
    font-size: 14px;
    color: #ffd700;
}

.review-card p {
    font-size: 14px;
    color: #666666;
    line-height: 1.8;
}

.changelog {
    padding: 80px 0;
}

.timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: #ff6b35;
    transform: translateX(-50%);
}

.timeline-item {
    display: flex;
    position: relative;
    margin-bottom: 40px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 20px;
    width: 16px;
    height: 16px;
    background-color: #ff6b35;
    border: 3px solid #ffffff;
    border-radius: 50%;
    box-shadow: 0 0 10px rgba(255, 107, 53, 0.3);
    transform: translateX(-50%);
}

.timeline-content {
    width: 45%;
    background-color: #ffffff;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.version {
    font-size: 18px;
    font-weight: bold;
    color: #ff6b35;
}

.date {
    font-size: 14px;
    color: #888888;
}

.timeline-content ul {
    list-style: none;
}

.timeline-content li {
    font-size: 14px;
    color: #666666;
    padding-left: 20px;
    margin-bottom: 8px;
    position: relative;
}

.timeline-content li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #ff6b35;
    font-weight: bold;
}

.footer {
    background-color: #333333;
    padding: 50px 0 30px;
}

.footer-content {
    text-align: center;
}

.footer-logo a {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: #ffffff;
    margin-bottom: 30px;
}

.footer-logo img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-links a {
    color: #cccccc;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #ff6b35;
}

.copyright {
    color: #666666;
    font-size: 14px;
}

i {
    display: inline-block;
    width: 24px;
    height: 24px;
    background-image: url('../svg-icon/icon-sprite.svg');
    background-size: auto 100%;
    background-repeat: no-repeat;
}

.icon-menu {
    width: 24px;
    height: 24px;
}

.icon-book {
    width: 48px;
    height: 48px;
    background-position: 0 0;
}

.icon-highlight {
    width: 48px;
    height: 48px;
    background-position: -48px 0;
}

.icon-offline {
    width: 48px;
    height: 48px;
    background-position: -96px 0;
}

.icon-ad-free {
    width: 48px;
    height: 48px;
    background-position: -144px 0;
}

.icon-update {
    width: 48px;
    height: 48px;
    background-position: -192px 0;
}

.icon-night {
    width: 48px;
    height: 48px;
    background-position: -240px 0;
}

.icon-user {
    width: 24px;
    height: 24px;
    background-position: -288px 0;
}

.icon-star {
    width: 14px;
    height: 14px;
    background-position: -312px 0;
}

.icon-star-half {
    width: 14px;
    height: 14px;
    background-position: -326px 0;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #ffffff;
        padding: 20px;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu li {
        margin-bottom: 15px;
    }

    .nav-menu li:last-child {
        margin-bottom: 0;
    }

    .mobile-menu-btn {
        display: block;
    }

    .banner .container {
        flex-direction: column;
        text-align: center;
    }

    .banner-content h1 {
        font-size: 36px;
    }

    .banner-content p {
        font-size: 16px;
    }

    .banner-image img {
        width: 200px;
        height: 200px;
    }

    .banner-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

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

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

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        flex-direction: column !important;
        padding-left: 50px;
    }

    .timeline-dot {
        left: 20px;
        transform: none;
    }

    .timeline-content {
        width: 100%;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 15px;
    }

    .screenshot-item {
        width: 220px;
        height: 350px;
    }
}

@media (max-width: 480px) {
    .navbar .container {
        padding: 10px 15px;
    }

    .logo {
        font-size: 18px;
    }

    .logo img {
        width: 30px;
        height: 30px;
    }

    .banner {
        padding: 100px 0 60px;
    }

    .banner-content h1 {
        font-size: 28px;
    }

    .btn-primary, .btn-secondary {
        padding: 12px 30px;
        font-size: 16px;
    }

    .section-header h2 {
        font-size: 24px;
    }

    .feature-card {
        padding: 30px 20px;
    }

    .download-card {
        padding: 30px 20px;
    }

    .review-card {
        padding: 20px;
    }
}