/* CSS Variables - 主题色管理 */
:root {
    --color-primary: #c1aa9c;
    --color-secondary: #f1e4e0;
    --color-dark: #334754;
    --color-accent: #957b5b;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #ffffff;
    --color-bg: #fafafa;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', 'Roboto', sans-serif;
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Header */
.header {
    background: linear-gradient(135deg, var(--color-dark) 0%, #2a3a45 100%);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--color-white);
    font-size: 1.5rem;
    font-weight: 700;
    transition: var(--transition);
}

.logo:hover {
    transform: translateY(-2px);
    opacity: 0.9;
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
}

.logo-text {
    font-family: 'Roboto', sans-serif;
}

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

.nav-link {
    color: var(--color-white);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link:hover {
    color: var(--color-primary);
    transform: translateY(-2px);
}

.nav-link i {
    font-size: 0.9rem;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-primary) 100%);
    padding: 4rem 0 3rem;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="100" height="100" patternUnits="userSpaceOnUse"><path d="M 100 0 L 0 0 0 100" fill="none" stroke="rgba(193,170,156,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: 2rem;
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--color-text-light);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-info {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--color-white);
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    box-shadow: var(--shadow-sm);
    font-size: 0.95rem;
    color: var(--color-dark);
}

.info-item i {
    color: var(--color-accent);
}

.hero-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.tag {
    background: var(--color-dark);
    color: var(--color-white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-dark) 100%);
    color: var(--color-white);
    padding: 1rem 2.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-accent) 100%);
}

.btn-download:active {
    transform: translateY(-1px);
}

/* Section Styles */
section {
    padding: 4rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-dark);
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: 2px;
}

/* Story Section */
.story {
    background: var(--color-white);
}

.story-content {
    max-width: 900px;
    margin: 0 auto;
}

.story-text {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-light);
    text-align: justify;
}

/* Features Section */
.features {
    background: linear-gradient(to bottom, var(--color-bg) 0%, var(--color-white) 100%);
}

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

.feature-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.feature-card i {
    font-size: 3rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.3rem;
    color: var(--color-dark);
    margin-bottom: 0.8rem;
}

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

/* News Section */
.news {
    background: var(--color-white);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.news-item {
    display: flex;
    gap: 2rem;
    background: var(--color-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.news-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-white);
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
}

.date-day {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.date-month {
    font-size: 1rem;
    opacity: 0.9;
}

.date-year {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-top: 0.2rem;
}

.news-content {
    flex: 1;
}

.news-title {
    font-size: 1.5rem;
    color: var(--color-dark);
    margin-bottom: 0.8rem;
}

.news-excerpt {
    color: var(--color-text-light);
    margin-bottom: 1rem;
    line-height: 1.7;
}

.news-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.news-link:hover {
    color: var(--color-dark);
    gap: 10px;
}

/* Gallery Section */
.gallery {
    background: linear-gradient(to bottom, var(--color-white) 0%, var(--color-bg) 100%);
}

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

.gallery-item {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    aspect-ratio: 16 / 9;
}

.gallery-item:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-lg);
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Reviews Section */
.reviews {
    background: var(--color-white);
}

.reviews-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.stats-item {
    text-align: center;
}

.stats-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
}

.stats-label {
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.stars {
    color: #ffc107;
    font-size: 1.2rem;
}

.review-tags {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.review-tag {
    background: var(--color-secondary);
    color: var(--color-dark);
    padding: 0.6rem 1.2rem;
    border-radius: 25px;
    font-size: 0.95rem;
    font-weight: 500;
}

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

.review-card {
    background: var(--color-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.review-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}

.review-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.reviewer-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.reviewer-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    color: var(--color-white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.reviewer-name {
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 0.3rem;
}

.review-stars {
    color: #ffc107;
    font-size: 0.9rem;
}

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

.review-text {
    color: var(--color-text-light);
    line-height: 1.7;
}

/* Updates Section */
.updates {
    background: linear-gradient(to bottom, var(--color-bg) 0%, var(--color-white) 100%);
}

.updates-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.update-item {
    background: var(--color-white);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--color-accent);
    transition: var(--transition);
}

.update-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(5px);
}

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

.update-version {
    font-size: 1.8rem;
    color: var(--color-dark);
    font-weight: 700;
}

.update-date {
    color: var(--color-text-light);
    font-size: 1rem;
}

.update-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.update-meta span {
    color: var(--color-text-light);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.update-meta i {
    color: var(--color-accent);
}

.update-content {
    margin-bottom: 1.5rem;
}

.update-content h4 {
    color: var(--color-dark);
    margin-top: 1rem;
    margin-bottom: 0.8rem;
    font-size: 1.1rem;
}

.update-content h4:first-child {
    margin-top: 0;
}

.update-content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
    color: var(--color-text-light);
    line-height: 1.8;
}

.update-content li {
    margin-bottom: 0.5rem;
}

.update-note {
    color: var(--color-text-light);
    line-height: 1.8;
    font-style: italic;
    padding: 1rem;
    background: var(--color-secondary);
    border-radius: 8px;
    margin-top: 1rem;
}

.update-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 0.8rem 1.5rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.update-download:hover {
    background: var(--color-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* FAQ Section */
.faq {
    background: var(--color-white);
}

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

.faq-item {
    margin-bottom: 1rem;
    border: 1px solid var(--color-secondary);
    border-radius: 10px;
    overflow: hidden;
    transition: var(--transition);
}

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

.faq-question {
    width: 100%;
    padding: 1.5rem;
    background: var(--color-bg);
    border: none;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--color-secondary);
}

.faq-question i {
    color: var(--color-accent);
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 1.5rem;
}

.faq-answer p {
    color: var(--color-text-light);
    line-height: 1.8;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, var(--color-dark) 0%, #2a3a45 100%);
    color: var(--color-white);
    padding: 3rem 0 1.5rem;
}

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

.footer-section h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--color-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.8rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
    display: inline-block;
}

.footer-links a:hover {
    color: var(--color-primary);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-accent), var(--color-dark));
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-list {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--color-dark);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        transform: translateX(-100%);
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }

    .nav-list.active {
        transform: translateX(0);
    }

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

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

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

    .hero-info {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .info-item {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

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

    .news-item {
        flex-direction: column;
    }

    .news-date {
        flex-direction: row;
        justify-content: center;
        min-width: auto;
        width: 100%;
    }

    .date-day {
        margin-right: 0.5rem;
    }

    .reviews-stats {
        gap: 2rem;
    }

    .update-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

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

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

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