/* CSS变量定义 */
:root {
    --primary-color: #121e28;
    --secondary-color-1: #141f2a;
    --secondary-color-2: #abb5cb;
    --secondary-color-3: #759ecb;
    --secondary-color-4: #5f7fad;
    --text-color: #ffffff;
    --text-secondary: #abb5cb;
    --transition: all 0.3s ease;
}

/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

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

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

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(180deg, rgba(18, 30, 40, 0.95) 0%, rgba(20, 31, 42, 0.95) 100%);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.navbar {
    padding: 1rem 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 1.5rem;
    font-weight: 700;
    transition: var(--transition);
}

.logo:hover {
    color: var(--secondary-color-3);
    transform: translateY(-2px);
}

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

.logo-text {
    background: linear-gradient(135deg, var(--secondary-color-3), var(--secondary-color-4));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-menu a:hover {
    color: var(--secondary-color-3);
    transform: translateY(-2px);
}

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

/* 英雄区 */
.hero {
    margin-top: 80px;
    padding: 3rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color-1) 100%);
    min-height: auto;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--secondary-color-3), var(--secondary-color-4));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--text-secondary);
    font-weight: 300;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

.info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.info-item i {
    color: var(--secondary-color-3);
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.tag {
    background: linear-gradient(135deg, rgba(117, 158, 203, 0.2), rgba(95, 127, 173, 0.2));
    border: 1px solid var(--secondary-color-3);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--secondary-color-3);
    transition: var(--transition);
}

.tag:hover {
    background: linear-gradient(135deg, rgba(117, 158, 203, 0.3), rgba(95, 127, 173, 0.3));
    transform: translateY(-2px);
}

.btn-download {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: linear-gradient(135deg, var(--secondary-color-3), var(--secondary-color-4));
    color: var(--text-color);
    padding: 1rem 2.5rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(117, 158, 203, 0.3);
}

.btn-download:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(117, 158, 203, 0.5);
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transition: var(--transition);
}

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

/* 通用区块标题 */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    background: linear-gradient(135deg, var(--secondary-color-3), var(--secondary-color-4));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title i {
    color: var(--secondary-color-3);
}

/* 新闻/动态区 */
.news {
    padding: 5rem 0;
    background: var(--secondary-color-1);
}

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

.news-card {
    background: linear-gradient(135deg, rgba(18, 30, 40, 0.8), rgba(20, 31, 42, 0.8));
    border: 1px solid rgba(117, 158, 203, 0.2);
    border-radius: 15px;
    padding: 2rem;
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color-3);
    box-shadow: 0 10px 30px rgba(117, 158, 203, 0.2);
}

.news-date {
    color: var(--secondary-color-3);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.news-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.news-content {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.news-link {
    color: var(--secondary-color-3);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}

.news-link:hover {
    color: var(--secondary-color-4);
    gap: 10px;
}

/* 媒体画廊 */
.gallery {
    padding: 5rem 0;
    background: var(--primary-color);
}

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

.gallery-item {
    position: relative;
    border-radius: 15px;
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 16/9;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

.gallery-item:hover img {
    transform: scale(1.1);
}

.gallery-overlay i {
    font-size: 3rem;
    color: var(--text-color);
}

/* 用户评价区 */
.reviews {
    padding: 5rem 0;
    background: var(--secondary-color-1);
}

.reviews-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

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

.stats-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--secondary-color-3);
    margin-bottom: 0.5rem;
}

.stats-label {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.stats-stars {
    color: #ffd700;
    font-size: 1.2rem;
}

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

.review-tag {
    background: linear-gradient(135deg, rgba(117, 158, 203, 0.2), rgba(95, 127, 173, 0.2));
    border: 1px solid var(--secondary-color-3);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--secondary-color-3);
}

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

.review-card {
    background: linear-gradient(135deg, rgba(18, 30, 40, 0.8), rgba(20, 31, 42, 0.8));
    border: 1px solid rgba(117, 158, 203, 0.2);
    border-radius: 15px;
    padding: 2rem;
    transition: var(--transition);
}

.review-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color-3);
    box-shadow: 0 10px 30px rgba(117, 158, 203, 0.2);
}

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

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

.review-rating {
    color: #ffd700;
}

.review-text {
    color: var(--text-secondary);
    line-height: 1.8;
    font-style: italic;
}

/* 版本历史 */
.versions {
    padding: 5rem 0;
    background: var(--primary-color);
}

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

.version-item {
    background: linear-gradient(135deg, rgba(18, 30, 40, 0.8), rgba(20, 31, 42, 0.8));
    border: 1px solid rgba(117, 158, 203, 0.2);
    border-radius: 15px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.version-item:hover {
    transform: translateX(5px);
    border-color: var(--secondary-color-3);
    box-shadow: 0 10px 30px rgba(117, 158, 203, 0.2);
}

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

.version-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color-3);
}

.version-date {
    color: var(--text-secondary);
}

.version-details {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.version-details span {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.version-details i {
    color: var(--secondary-color-3);
}

.version-content {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.version-download {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--secondary-color-3);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.version-download:hover {
    color: var(--secondary-color-4);
    gap: 12px;
}

/* 游戏攻略 */
.guide {
    padding: 5rem 0;
    background: var(--secondary-color-1);
}

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

.filter-btn {
    background: linear-gradient(135deg, rgba(18, 30, 40, 0.8), rgba(20, 31, 42, 0.8));
    border: 1px solid rgba(117, 158, 203, 0.2);
    color: var(--text-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.95rem;
    font-weight: 500;
}

.filter-btn:hover,
.filter-btn.active {
    background: linear-gradient(135deg, var(--secondary-color-3), var(--secondary-color-4));
    border-color: var(--secondary-color-3);
    color: var(--text-color);
    transform: translateY(-2px);
}

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

.guide-card {
    background: linear-gradient(135deg, rgba(18, 30, 40, 0.8), rgba(20, 31, 42, 0.8));
    border: 1px solid rgba(117, 158, 203, 0.2);
    border-radius: 15px;
    padding: 2rem;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.guide-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary-color-3);
    box-shadow: 0 10px 30px rgba(117, 158, 203, 0.2);
}

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

.guide-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-color);
    flex: 1;
}

.guide-difficulty {
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    font-weight: 500;
    white-space: nowrap;
}

.guide-difficulty.easy {
    background: rgba(76, 175, 80, 0.2);
    color: #4caf50;
    border: 1px solid #4caf50;
}

.guide-difficulty.medium {
    background: rgba(255, 152, 0, 0.2);
    color: #ff9800;
    border: 1px solid #ff9800;
}

.guide-difficulty.hard {
    background: rgba(244, 67, 54, 0.2);
    color: #f44336;
    border: 1px solid #f44336;
}

.guide-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    flex: 1;
}

.guide-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.guide-tag {
    background: linear-gradient(135deg, rgba(117, 158, 203, 0.2), rgba(95, 127, 173, 0.2));
    border: 1px solid var(--secondary-color-3);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    color: var(--secondary-color-3);
}

.guide-recommend {
    color: var(--secondary-color-3);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

/* 游戏章节介绍 */
.chapters {
    padding: 5rem 0;
    background: var(--primary-color);
}

.chapters-list {
    display: grid;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.chapter-card {
    background: linear-gradient(135deg, rgba(18, 30, 40, 0.8), rgba(20, 31, 42, 0.8));
    border: 1px solid rgba(117, 158, 203, 0.2);
    border-radius: 15px;
    padding: 2rem;
    transition: var(--transition);
}

.chapter-card:hover {
    transform: translateX(5px);
    border-color: var(--secondary-color-3);
    box-shadow: 0 10px 30px rgba(117, 158, 203, 0.2);
}

.chapter-card.main {
    border-left: 4px solid var(--secondary-color-3);
}

.chapter-card.character {
    border-left: 4px solid var(--secondary-color-4);
}

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

.chapter-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
}

.chapter-type {
    background: linear-gradient(135deg, rgba(117, 158, 203, 0.2), rgba(95, 127, 173, 0.2));
    border: 1px solid var(--secondary-color-3);
    padding: 0.25rem 0.75rem;
    border-radius: 15px;
    font-size: 0.8rem;
    color: var(--secondary-color-3);
    white-space: nowrap;
}

.chapter-description {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.chapter-info {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.chapter-info span {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
}

.chapter-info i {
    color: var(--secondary-color-3);
}

.chapter-tone {
    color: var(--secondary-color-3);
    font-size: 0.9rem;
    font-style: italic;
}

/* 常见问题 */
.faq {
    padding: 5rem 0;
    background: var(--secondary-color-1);
}

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

.faq-item {
    background: linear-gradient(135deg, rgba(18, 30, 40, 0.8), rgba(20, 31, 42, 0.8));
    border: 1px solid rgba(117, 158, 203, 0.2);
    border-radius: 15px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--secondary-color-3);
}

.faq-question {
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-color);
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--secondary-color-3);
}

.faq-question i {
    color: var(--secondary-color-3);
    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;
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.5rem 1.5rem 1.5rem;
}

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

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--secondary-color-3), var(--secondary-color-4));
    border: none;
    border-radius: 50%;
    color: var(--text-color);
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: 0 4px 15px rgba(117, 158, 203, 0.3);
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 20px rgba(117, 158, 203, 0.5);
}

/* 底部信息 */
.footer {
    background: var(--primary-color);
    padding: 4rem 0 2rem 0;
    border-top: 1px solid rgba(117, 158, 203, 0.2);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--secondary-color-3);
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

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

.footer-links a:hover {
    color: var(--secondary-color-3);
    transform: translateX(5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(117, 158, 203, 0.2);
    color: var(--text-secondary);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--secondary-color-1);
        flex-direction: column;
        align-items: flex-start;
        padding: 2rem;
        transition: left 0.3s ease;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    }

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

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

    .nav-menu a {
        width: 100%;
        padding: 1rem 0;
        font-size: 1.1rem;
    }

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

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

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

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

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

    .reviews-stats {
        gap: 2rem;
    }

    .stats-value {
        font-size: 2rem;
    }

    .hero {
        padding: 2rem 0;
    }

    .news,
    .gallery,
    .reviews,
    .versions,
    .guide,
    .chapters,
    .faq {
        padding: 3rem 0;
    }
}

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

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

    .btn-download {
        padding: 0.875rem 2rem;
        font-size: 1rem;
    }

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

    .news-grid,
    .gallery-grid,
    .reviews-carousel,
    .guide-grid {
        grid-template-columns: 1fr;
    }

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

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

/* 隐藏筛选后的卡片 */
.guide-card.hidden {
    display: none;
}