/* ========================
   CSS 变量定义
   ======================== */
:root {
    --color-primary: #937e89;
    --color-secondary-1: #4d1a25;
    --color-secondary-2: #bdc2ca;
    --color-secondary-3: #40394c;
    --color-white: #ffffff;
    --color-black: #000000;
    --color-text-dark: #2c2c2c;
    --color-text-light: #666666;
    --color-bg-light: #f8f9fa;
    --color-bg-dark: #1a1a1a;
    --gradient-primary: linear-gradient(135deg, var(--color-primary), var(--color-secondary-3));
    --gradient-hero: linear-gradient(135deg, rgba(147, 126, 137, 0.9), rgba(64, 57, 76, 0.95));
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-fast);
}

ul {
    list-style: none;
}

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

/* ========================
   按钮样式
   ======================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 30px;
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: var(--color-secondary-2);
    color: var(--color-text-dark);
}

.btn-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-large {
    padding: 16px 40px;
    font-size: 18px;
}

/* ========================
   页面标题样式
   ======================== */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 50px;
    color: var(--color-secondary-3);
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* ========================
   头部导航
   ======================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar {
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-secondary-3);
    transition: color var(--transition-fast);
}

.logo img {
    width: 40px;
    height: 40px;
}

.logo:hover {
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    gap: 30px;
    align-items: center;
}

.nav-menu a {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
    color: var(--color-text-dark);
    padding: 8px 0;
    position: relative;
}

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

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

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

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

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-secondary-3);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

/* ========================
   英雄区
   ======================== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: url('../img/游戏截图2.webp') center center / cover no-repeat;
    margin-top: 70px;
    padding: 60px 20px;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(147, 126, 137, 0.85), rgba(64, 57, 76, 0.9));
    animation: heroAnimation 15s ease-in-out infinite;
}

@keyframes heroAnimation {
    0%, 100% { opacity: 0.85; }
    50% { opacity: 0.75; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    color: var(--color-white);
    margin-bottom: 10px;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 1.8rem;
    color: var(--color-secondary-2);
    margin-bottom: 15px;
    font-weight: 300;
    letter-spacing: 3px;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--color-white);
    margin-bottom: 30px;
    opacity: 0.95;
}

.hero-info {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-bottom: 25px;
}

.info-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    padding: 8px 16px;
    border-radius: var(--border-radius-lg);
    color: var(--color-white);
    font-size: 0.9rem;
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin-bottom: 35px;
}

.feature-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: rgba(77, 26, 37, 0.6);
    padding: 8px 18px;
    border-radius: var(--border-radius-xl);
    color: var(--color-white);
    font-size: 0.95rem;
    border: 1px solid rgba(147, 126, 137, 0.5);
    transition: all var(--transition-fast);
}

.feature-tag:hover {
    background-color: rgba(147, 126, 137, 0.8);
    transform: translateY(-2px);
}

/* ========================
   游戏介绍区
   ======================== */
.game-intro {
    padding: 80px 20px;
    background-color: var(--color-bg-light);
}

.intro-content {
    max-width: 900px;
    margin: 0 auto 50px;
    text-align: center;
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-light);
}

.game-specs {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.spec-item {
    text-align: center;
    padding: 30px;
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

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

.spec-item i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.spec-item h3 {
    font-size: 1.3rem;
    color: var(--color-secondary-3);
    margin-bottom: 10px;
}

.spec-item p {
    color: var(--color-text-light);
}

/* ========================
   最新动态区
   ======================== */
.news-section {
    padding: 80px 20px;
    background-color: var(--color-white);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.news-card {
    display: flex;
    gap: 20px;
    background-color: var(--color-white);
    padding: 25px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border-left: 4px solid var(--color-primary);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: 15px;
    border-radius: var(--border-radius-md);
    min-width: 70px;
    text-align: center;
}

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

.date-month {
    font-size: 0.9rem;
    margin-top: 5px;
}

.news-content {
    flex: 1;
}

.news-content h3 {
    font-size: 1.3rem;
    color: var(--color-secondary-3);
    margin-bottom: 12px;
}

.news-content p {
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 15px;
}

.news-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-primary);
    font-weight: 600;
    transition: gap var(--transition-fast);
}

.news-link:hover {
    gap: 10px;
}

/* ========================
   媒体画廊区
   ======================== */
.gallery-section {
    padding: 80px 20px;
    background-color: var(--color-bg-light);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    aspect-ratio: 16 / 9;
}

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

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(64, 57, 76, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

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

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

/* ========================
   用户评价区
   ======================== */
.reviews-section {
    padding: 80px 20px;
    background-color: var(--color-white);
}

.reviews-stats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 40px;
    margin-bottom: 50px;
    padding: 30px;
    background-color: var(--color-bg-light);
    border-radius: var(--border-radius-lg);
}

.rating-summary {
    text-align: center;
}

.rating-score {
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 10px;
}

.rating-stars {
    font-size: 1.5rem;
    color: #ffc107;
    margin-bottom: 10px;
}

.rating-count {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.rating-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
    justify-content: center;
    max-width: 600px;
}

.rating-tags .tag {
    background-color: var(--color-white);
    color: var(--color-primary);
    padding: 8px 16px;
    border-radius: var(--border-radius-xl);
    font-size: 0.9rem;
    border: 2px solid var(--color-primary);
    transition: all var(--transition-fast);
}

.rating-tags .tag:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.reviews-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.review-card {
    background-color: var(--color-white);
    padding: 25px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border-top: 3px solid var(--color-primary);
}

.review-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

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

.reviewer-info h4 {
    color: var(--color-secondary-3);
    margin-bottom: 5px;
}

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

.review-date {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

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

/* ========================
   游戏攻略区
   ======================== */
.guides-section {
    padding: 80px 20px;
    background-color: var(--color-bg-light);
}

.guides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.guide-card {
    background-color: var(--color-white);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border-left: 4px solid var(--color-primary);
}

.guide-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.guide-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.guide-icon i {
    font-size: 1.8rem;
    color: var(--color-white);
}

.guide-card h3 {
    font-size: 1.3rem;
    color: var(--color-secondary-3);
    margin-bottom: 12px;
}

.guide-card p {
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 15px;
}

.guide-meta {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 0.9rem;
}

.difficulty {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: var(--border-radius-sm);
    width: fit-content;
}

.difficulty.easy {
    background-color: #d4edda;
    color: #155724;
}

.difficulty.medium {
    background-color: #fff3cd;
    color: #856404;
}

.difficulty.hard {
    background-color: #f8d7da;
    color: #721c24;
}

.recommend {
    color: var(--color-primary);
    font-weight: 600;
}

/* ========================
   章节介绍区
   ======================== */
.chapters-section {
    padding: 80px 20px;
    background-color: var(--color-white);
}

.chapters-container {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.chapter-item {
    background-color: var(--color-white);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    border-left: 5px solid var(--color-primary);
}

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

.chapter-item.character-chapter {
    border-left-color: var(--color-secondary-1);
}

.chapter-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.chapter-badge {
    padding: 5px 15px;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-white);
}

.chapter-badge.main {
    background-color: var(--color-primary);
}

.chapter-badge.character {
    background-color: var(--color-secondary-1);
}

.chapter-header h3 {
    font-size: 1.4rem;
    color: var(--color-secondary-3);
    flex: 1;
    min-width: 200px;
}

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

.chapter-desc {
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 15px;
}

.chapter-info {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.chapter-info span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

/* ========================
   版本历史区
   ======================== */
.versions-section {
    padding: 80px 20px;
    background-color: var(--color-bg-light);
}

.versions-timeline {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.version-item {
    position: relative;
    padding-left: 40px;
}

.version-item::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 40px;
    bottom: -30px;
    width: 2px;
    background-color: var(--color-secondary-2);
}

.version-item:last-child::before {
    display: none;
}

.version-item::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 35px;
    width: 12px;
    height: 12px;
    background-color: var(--color-primary);
    border: 3px solid var(--color-white);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--color-primary);
}

.version-badge {
    position: absolute;
    left: 40px;
    top: -10px;
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: 5px 15px;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
}

.version-content {
    background-color: var(--color-white);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.version-content:hover {
    box-shadow: var(--shadow-md);
}

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

.version-header h3 {
    font-size: 1.5rem;
    color: var(--color-secondary-3);
}

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

.version-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.version-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.version-updates h4 {
    color: var(--color-secondary-3);
    margin-bottom: 12px;
}

.version-updates ul {
    list-style: none;
    margin-bottom: 20px;
}

.version-updates li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 10px;
}

.version-updates li i {
    color: var(--color-primary);
    margin-top: 4px;
}

/* ========================
   常见问题区
   ======================== */
.faq-section {
    padding: 80px 20px;
    background-color: var(--color-white);
}

.faq-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.faq-item {
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: all var(--transition-normal);
}

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

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    cursor: pointer;
    background-color: var(--color-bg-light);
    transition: background-color var(--transition-fast);
}

.faq-question:hover {
    background-color: var(--color-secondary-2);
}

.faq-question h3 {
    font-size: 1.1rem;
    color: var(--color-secondary-3);
    flex: 1;
}

.faq-question i {
    font-size: 1.2rem;
    color: var(--color-primary);
    transition: transform var(--transition-normal);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.active .faq-answer {
    max-height: 1000px;
}

.faq-answer p,
.faq-answer ul {
    padding: 20px 25px;
    color: var(--color-text-light);
    line-height: 1.7;
}

.faq-answer ul {
    list-style: disc;
    padding-left: 45px;
    padding-top: 10px;
}

.faq-answer li {
    margin-bottom: 8px;
}

.faq-answer strong {
    color: var(--color-secondary-3);
}

.faq-answer code {
    background-color: var(--color-bg-light);
    padding: 2px 8px;
    border-radius: var(--border-radius-sm);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

/* ========================
   底部
   ======================== */
.footer {
    background-color: var(--color-secondary-3);
    color: var(--color-white);
    padding: 50px 20px 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--color-secondary-2);
}

.footer-section p {
    line-height: 1.6;
    opacity: 0.9;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: var(--color-white);
    opacity: 0.8;
    transition: all var(--transition-fast);
    display: inline-block;
}

.footer-section ul li a:hover {
    opacity: 1;
    padding-left: 5px;
    color: var(--color-secondary-2);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    opacity: 0.7;
    font-size: 0.9rem;
}

/* ========================
   返回顶部按钮
   ======================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    font-size: 1.2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

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

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

/* ========================
   图片查看器
   ======================== */
.image-modal {
    display: none;
    position: fixed;
    z-index: 9999;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.95);
    animation: fadeIn var(--transition-normal);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: var(--color-white);
    font-size: 40px;
    font-weight: 300;
    cursor: pointer;
    transition: color var(--transition-fast);
}

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

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

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        max-width: 300px;
        height: calc(100vh - 70px);
        background-color: var(--color-white);
        flex-direction: column;
        gap: 0;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        transition: left var(--transition-normal);
        overflow-y: auto;
    }

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

    .nav-menu li {
        width: 100%;
        border-bottom: 1px solid var(--color-bg-light);
    }

    .nav-menu a {
        display: flex;
        padding: 15px 10px;
        width: 100%;
    }

    /* 英雄区 */
    .hero {
        min-height: 500px;
        padding: 40px 20px;
    }

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

    .hero-subtitle {
        font-size: 1.3rem;
    }

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

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

    .info-badge,
    .feature-tag {
        font-size: 0.85rem;
        padding: 6px 12px;
    }

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

    /* 网格布局 */
    .news-grid,
    .gallery-grid,
    .guides-grid,
    .reviews-carousel {
        grid-template-columns: 1fr;
    }

    /* 评价区 */
    .reviews-stats {
        flex-direction: column;
        gap: 20px;
    }

    /* 版本历史 */
    .version-header {
        flex-direction: column;
        align-items: flex-start;
    }

    /* 底部 */
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    /* 返回顶部 */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }

    /* 图片查看器 */
    .modal-close {
        top: 10px;
        right: 20px;
        font-size: 30px;
    }
}

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .btn-large {
        padding: 14px 30px;
        font-size: 16px;
    }

    .section-title {
        font-size: 1.7rem;
    }

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

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

/* ========================
   滚动动画（可选）
   ======================== */
@media (prefers-reduced-motion: no-preference) {
    .fade-in {
        opacity: 0;
        transform: translateY(20px);
        transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .fade-in.visible {
        opacity: 1;
        transform: translateY(0);
    }
}