/* ===================================
   CSS变量定义
   =================================== */
:root {
    /* 主题配色 */
    --color-primary: #7ba499;
    --color-secondary: #ddc6b4;
    --color-accent-1: #473834;
    --color-accent-2: #8e5b41;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #7ba499 0%, #6a9488 100%);
    --gradient-secondary: linear-gradient(135deg, #ddc6b4 0%, #cbb5a3 100%);
    --gradient-hero: linear-gradient(135deg, rgba(123, 164, 153, 0.1) 0%, rgba(221, 198, 180, 0.1) 100%);
    
    /* 中性色 */
    --color-dark: #2c2c2c;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e0e0e0;
    
    /* 功能色 */
    --color-success: #4caf50;
    --color-warning: #ff9800;
    --color-error: #f44336;
    --color-info: #2196f3;
    
    /* 间距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.18);
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 字体 */
    --font-primary: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-english: 'Poppins', sans-serif;
}

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

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

body {
    font-family: var(--font-primary);
    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 var(--spacing-md);
}

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

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

ul {
    list-style: none;
}

/* ===================================
   返回顶部按钮
   =================================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

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

/* ===================================
   头部导航
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.logo img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

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

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

.nav-download-btn {
    background: var(--gradient-primary);
    color: white !important;
    padding: 0.75rem 1.5rem !important;
    border-radius: var(--radius-full);
    font-weight: 600;
}

.nav-download-btn::after {
    display: none;
}

.nav-download-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

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

/* ===================================
   节标题
   =================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.section-header h2 i {
    color: var(--color-primary);
}

.section-header p {
    color: var(--color-text-light);
    font-size: 1.1rem;
}

/* ===================================
   英雄区
   =================================== */
.hero {
    margin-top: 80px;
    padding: var(--spacing-xl) 0;
    background: var(--gradient-hero);
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #ff6b6b, #ee5a6f);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.hero-title {
    font-size: 3.5rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.title-subtitle {
    display: block;
    font-size: 1.5rem;
    color: var(--color-primary);
    font-family: var(--font-english);
    font-weight: 400;
    margin-top: 0.5rem;
}

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

.hero-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: var(--spacing-md);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.meta-item i {
    color: var(--color-primary);
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: var(--spacing-lg);
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    color: var(--color-text);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    border: 2px solid var(--color-border);
    transition: var(--transition-fast);
}

.tag:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

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

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    border-radius: var(--radius-lg);
    font-size: 1.1rem;
    font-weight: 600;
    transition: var(--transition-fast);
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: white;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

.btn-small {
    padding: 0.6rem 1.2rem;
    font-size: 0.95rem;
}

.hero-image {
    position: relative;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero-image img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.hero-image-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: var(--color-dark);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-full);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-lg);
}

/* ===================================
   新闻动态区
   =================================== */
.news {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-alt);
}

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

.news-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

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

.news-date {
    background: var(--gradient-primary);
    color: white;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    text-align: center;
    min-width: 70px;
    height: fit-content;
}

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

.date-month {
    display: block;
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.news-content h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.news-content p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.news-link {
    color: var(--color-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.news-link:hover {
    gap: 0.75rem;
}

/* ===================================
   游戏特色
   =================================== */
.features {
    padding: var(--spacing-3xl) 0;
}

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

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

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto var(--spacing-md);
    transition: var(--transition-normal);
}

.feature-card:hover .feature-icon {
    transform: rotateY(360deg);
}

.feature-card h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1.4rem;
}

.feature-card p {
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ===================================
   媒体画廊
   =================================== */
.gallery {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-alt);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.gallery-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.gallery-item:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-xl);
}

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

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(123, 164, 153, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-normal);
}

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

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

/* ===================================
   灯箱
   =================================== */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.lightbox.active {
    display: flex;
}

.lightbox img {
    max-width: 90%;
    max-height: 90%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
    position: absolute;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255, 255, 255, 0.4);
}

.lightbox-close {
    top: 2rem;
    right: 2rem;
}

.lightbox-prev {
    left: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

.lightbox-next {
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

/* ===================================
   用户评价
   =================================== */
.reviews {
    padding: var(--spacing-3xl) 0;
}

.reviews-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

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

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.stat-stars {
    color: #ffd700;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    color: var(--color-text-light);
    font-size: 1.1rem;
}

.reviews-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.review-tag {
    background: var(--gradient-secondary);
    color: var(--color-dark);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-full);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

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

.reviews-carousel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.review-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

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

.review-header {
    margin-bottom: var(--spacing-md);
}

.reviewer-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.reviewer-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.reviewer-name {
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 0.25rem;
}

.review-stars {
    color: #ffd700;
}

.review-text {
    color: var(--color-text);
    line-height: 1.7;
    font-style: italic;
}

/* ===================================
   游戏攻略
   =================================== */
.guide {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-alt);
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

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

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

.guide-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    flex-shrink: 0;
}

.guide-content h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.guide-content p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.guide-difficulty {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
}

.guide-difficulty.easy {
    background: rgba(76, 175, 80, 0.1);
    color: var(--color-success);
}

.guide-difficulty.medium {
    background: rgba(255, 152, 0, 0.1);
    color: var(--color-warning);
}

.guide-difficulty.hard {
    background: rgba(244, 67, 54, 0.1);
    color: var(--color-error);
}

/* ===================================
   游戏章节
   =================================== */
.chapters {
    padding: var(--spacing-3xl) 0;
}

.chapters-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.chapter-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.chapter-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: var(--gradient-primary);
    transition: var(--transition-normal);
}

.chapter-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.chapter-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.main-badge {
    background: linear-gradient(135deg, #7ba499, #6a9488);
    color: white;
}

.character-badge {
    background: linear-gradient(135deg, #ddc6b4, #cbb5a3);
    color: var(--color-dark);
}

.important-badge {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: var(--color-dark);
}

.chapter-info h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.chapter-desc {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.chapter-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.chapter-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

/* ===================================
   版本历史
   =================================== */
.versions {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-alt);
}

.versions-timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.versions-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--gradient-primary);
}

.version-card {
    position: relative;
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    margin-left: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.version-card::before {
    content: '';
    position: absolute;
    left: -44px;
    top: 30px;
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    border: 4px solid white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
}

.version-card:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
}

.version-card.current {
    border: 2px solid var(--color-primary);
}

.version-card.current::before {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
}

.version-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: var(--color-dark);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.version-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.version-header h3 {
    color: var(--color-dark);
    font-size: 1.4rem;
}

.version-date {
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.version-content h4 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.version-content ul {
    margin-bottom: var(--spacing-md);
}

.version-content li {
    color: var(--color-text);
    padding: 0.5rem 0;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.version-content li i {
    color: var(--color-success);
    margin-top: 0.25rem;
}

.version-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.version-meta span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.version-meta i {
    color: var(--color-primary);
}

/* ===================================
   常见问题
   =================================== */
.faq {
    padding: var(--spacing-3xl) 0;
}

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

.faq-item {
    background: white;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition-normal);
}

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

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    cursor: pointer;
    user-select: none;
}

.faq-question h3 {
    color: var(--color-dark);
    font-size: 1.2rem;
    font-weight: 600;
}

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

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

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

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

.faq-answer p {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text);
    line-height: 1.8;
}

/* ===================================
   底部信息
   =================================== */
.footer {
    background: linear-gradient(135deg, #473834 0%, #2c2c2c 100%);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer-section h3 {
    color: white;
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
}

.footer-section p {
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-fast);
}

.footer-section a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.footer-social a:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-3px);
}

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

.footer-bottom p {
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer-disclaimer {
    font-size: 0.9rem;
    font-style: italic;
}

/* ===================================
   响应式设计
   =================================== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .hero-image {
        order: -1;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 72px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 72px);
        background: white;
        flex-direction: column;
        align-items: flex-start;
        padding: var(--spacing-lg);
        gap: 0;
        transition: var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu a {
        width: 100%;
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--color-border);
    }
    
    .nav-download-btn {
        width: 100%;
        text-align: center;
        justify-content: center;
        margin-top: var(--spacing-md);
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .title-subtitle {
        font-size: 1.2rem;
    }
    
    .hero-meta {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    
    .hero-meta .meta-item {
        font-size: 0.9rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .features-grid,
    .guide-grid {
        grid-template-columns: 1fr;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
    }
    
    .versions-timeline::before {
        left: 10px;
    }
    
    .version-card {
        margin-left: var(--spacing-lg);
    }
    
    .version-card::before {
        left: -22px;
        width: 15px;
        height: 15px;
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 45px;
        height: 45px;
    }
    
    .lightbox-prev,
    .lightbox-next {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .lightbox-prev {
        left: 1rem;
    }
    
    .lightbox-next {
        right: 1rem;
    }
    
    .lightbox-close {
        top: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    :root {
        font-size: 14px;
    }
    
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-header h2 {
        font-size: 1.5rem;
    }
    
    .news-grid,
    .reviews-carousel {
        grid-template-columns: 1fr;
    }
    
    .news-card {
        flex-direction: column;
    }
    
    .news-date {
        width: fit-content;
    }
}

/* ===================================
   动画效果
   =================================== */
@media (prefers-reduced-motion: no-preference) {
    .fade-in {
        animation: fadeIn 0.6s ease-in;
    }
    
    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
}

/* ===================================
   打印样式
   =================================== */
@media print {
    .header,
    .nav-toggle,
    .back-to-top,
    .hero-actions,
    .lightbox,
    .footer-social {
        display: none !important;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.5;
    }
    
    .container {
        max-width: 100%;
    }
}

/* ===================================
   页面标题区
   =================================== */
.page-header {
    background: var(--gradient-hero);
    padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
    margin-top: 72px;
    text-align: center;
}

.page-header-content h1 {
    font-size: 2.5rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.page-header-content h1 i {
    color: var(--color-primary);
}

.page-header-content p {
    font-size: 1.2rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
}

.breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.breadcrumb a {
    color: var(--color-primary);
    transition: var(--transition-fast);
}

.breadcrumb a:hover {
    color: var(--color-accent-2);
}

/* ===================================
   FAQ页面样式
   =================================== */
.faq-categories {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-alt);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.category-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
    border: 2px solid transparent;
}

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

.category-card i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.category-card h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1.3rem;
}

.category-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.faq-content {
    padding: var(--spacing-3xl) 0;
}

.faq-section {
    margin-bottom: var(--spacing-3xl);
}

.faq-section h2 {
    color: var(--color-dark);
    font-size: 2rem;
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.faq-section h2 i {
    color: var(--color-primary);
}

.faq-section ol,
.faq-section ul {
    padding-left: 1.5rem;
}

.faq-section ol li,
.faq-section ul li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    line-height: 1.7;
}

.faq-section strong {
    color: var(--color-dark);
    font-weight: 600;
}

.quick-help {
    background: var(--gradient-hero);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    margin-top: var(--spacing-3xl);
}

.quick-help h2 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.quick-help p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.help-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.help-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

.help-card i {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.help-card h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.help-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ===================================
   用户手册样式
   =================================== */
.manual-content {
    padding: var(--spacing-3xl) 0;
}

.manual-content .container {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.manual-sidebar {
    position: relative;
}

.sidebar-sticky {
    position: sticky;
    top: 100px;
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.sidebar-sticky h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.manual-nav {
    list-style: none;
}

.manual-nav li {
    margin-bottom: var(--spacing-sm);
}

.manual-nav a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    transition: var(--transition-fast);
}

.manual-nav a:hover {
    background: var(--color-bg-alt);
    color: var(--color-primary);
    padding-left: 1rem;
}

.manual-nav a i {
    font-size: 0.75rem;
    color: var(--color-primary);
}

.manual-main {
    min-width: 0;
}

.manual-section {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
}

.manual-section h2 {
    color: var(--color-dark);
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.manual-section h2 i {
    color: var(--color-primary);
}

.manual-section h3 {
    color: var(--color-dark);
    font-size: 1.4rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.manual-section h4 {
    color: var(--color-dark);
    font-size: 1.1rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.content-box {
    line-height: 1.8;
}

.content-box p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.content-box ul,
.content-box ol {
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.content-box li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.content-box strong {
    color: var(--color-dark);
    font-weight: 600;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.info-item {
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
}

.requirements {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.req-column {
    background: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
}

.req-column h4 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    font-size: 1.2rem;
}

.steps {
    margin: var(--spacing-lg) 0;
}

.step {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h4 {
    margin-top: 0;
    color: var(--color-dark);
}

.note-box {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
    display: flex;
    gap: var(--spacing-md);
}

.note-box i {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.note-box.warning {
    background: rgba(255, 152, 0, 0.1);
    border-left: 4px solid var(--color-warning);
}

.note-box.warning i {
    color: var(--color-warning);
}

.note-box.info {
    background: rgba(33, 150, 243, 0.1);
    border-left: 4px solid var(--color-info);
}

.note-box.info i {
    color: var(--color-info);
}

.note-box.success {
    background: rgba(76, 175, 80, 0.1);
    border-left: 4px solid var(--color-success);
}

.note-box.success i {
    color: var(--color-success);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.control-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
}

.control-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.control-desc strong {
    display: block;
    color: var(--color-dark);
    margin-bottom: 0.25rem;
}

.control-desc p {
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin: 0;
}

.keyboard-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
}

.keyboard-table th,
.keyboard-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.keyboard-table th {
    background: var(--color-bg-alt);
    color: var(--color-dark);
    font-weight: 600;
}

.keyboard-table kbd {
    background: var(--color-dark);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: monospace;
    font-size: 0.9rem;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.tip-card {
    background: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
}

.tip-card i {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.tip-card h4 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.tip-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    margin: 0;
}

.manual-nav-buttons {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.nav-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-lg);
    transition: var(--transition-fast);
}

.nav-button:hover {
    background: var(--color-accent-2);
    transform: translateY(-2px);
}

/* ===================================
   技术支持页面
   =================================== */
.support-content {
    padding: var(--spacing-3xl) 0;
}

.support-quick {
    margin-bottom: var(--spacing-3xl);
}

.support-quick h2 {
    font-size: 2rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.quick-link-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition-normal);
    border: 2px solid transparent;
}

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

.quick-link-card i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.quick-link-card h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.quick-link-card p {
    color: var(--color-text-light);
}

.troubleshooting {
    margin-bottom: var(--spacing-3xl);
}

.troubleshooting h2 {
    font-size: 2rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.trouble-category {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.trouble-category h3 {
    color: var(--color-dark);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.trouble-category h4 {
    color: var(--color-primary);
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.trouble-content ul,
.trouble-content ol {
    padding-left: 1.5rem;
}

.trouble-content li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    line-height: 1.7;
}

.contact-support {
    background: var(--gradient-hero);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-3xl);
}

.contact-support h2 {
    color: var(--color-dark);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.contact-support > p {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.contact-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
}

.contact-card i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.contact-card h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.contact-card p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.report-guide {
    margin-bottom: var(--spacing-3xl);
}

.report-guide h2 {
    font-size: 2rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.report-guide > p {
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.guide-step {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.guide-step .step-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    font-weight: 700;
    margin: 0 auto var(--spacing-md);
}

.guide-step h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

.guide-step p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.system-requirements {
    margin-bottom: var(--spacing-3xl);
}

.system-requirements h2 {
    font-size: 2rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xl);
}

.requirements-compare {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.req-box {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    position: relative;
}

.req-box.recommended {
    border: 2px solid var(--color-primary);
}

.recommended-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.9rem;
}

.req-box h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-lg);
    font-size: 1.5rem;
}

.req-box ul {
    list-style: none;
}

.req-box li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
}

.req-box li:last-child {
    border-bottom: none;
}

.useful-resources {
    margin-bottom: var(--spacing-3xl);
}

.useful-resources h2 {
    font-size: 2rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-xl);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.resource-item {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-normal);
}

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

.resource-item i {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.resource-item h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.resource-item p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

/* ===================================
   问题反馈页面
   =================================== */
.feedback-content {
    padding: var(--spacing-3xl) 0;
}

.feedback-intro {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
}

.feedback-intro h2 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.checklist {
    list-style: none;
}

.checklist li {
    padding: var(--spacing-sm) 0;
    color: var(--color-text);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.checklist i {
    color: var(--color-success);
    margin-top: 0.25rem;
}

.feedback-types {
    margin-bottom: var(--spacing-xl);
}

.feedback-types h2 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-xl);
}

.types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.type-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition-normal);
}

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

.type-card i {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.type-card h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.type-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.feedback-form-section {
    margin-bottom: var(--spacing-3xl);
}

.feedback-form-section h2 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-xl);
}

.form-container {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.feedback-form .form-group {
    margin-bottom: var(--spacing-lg);
}

.feedback-form label {
    display: block;
    color: var(--color-dark);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.feedback-form label i {
    color: var(--color-primary);
    margin-right: 0.5rem;
}

.required {
    color: var(--color-error);
}

.feedback-form input[type="text"],
.feedback-form input[type="email"],
.feedback-form select,
.feedback-form textarea {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 1rem;
    transition: var(--transition-fast);
}

.feedback-form input:focus,
.feedback-form select:focus,
.feedback-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.feedback-form textarea {
    resize: vertical;
    min-height: 150px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.char-count {
    text-align: right;
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.file-upload input[type="file"] {
    display: none;
}

.file-upload-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

.file-upload-label:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-alt);
}

.file-upload-label i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.file-upload-label span {
    color: var(--color-dark);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.file-upload-label small {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

.file-list {
    margin-top: var(--spacing-md);
}

.file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

.file-item i {
    color: var(--color-primary);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    margin-top: 0.25rem;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.form-success {
    text-align: center;
    padding: var(--spacing-3xl);
}

.form-success i {
    font-size: 5rem;
    color: var(--color-success);
    margin-bottom: var(--spacing-lg);
}

.form-success h3 {
    color: var(--color-dark);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.form-success p {
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
}

.feedback-tips {
    background: var(--color-bg-alt);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
}

.feedback-tips h2 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-xl);
}

.tips-grid .tip-item {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    text-align: center;
}

.tips-grid .tip-item i {
    font-size: 2.5rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.tips-grid .tip-item h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

.tips-grid .tip-item p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.alternative-contacts {
    margin-top: var(--spacing-3xl);
}

.alternative-contacts h2 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.alternative-contacts > p {
    color: var(--color-text);
    margin-bottom: var(--spacing-xl);
}

.contact-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.contact-option {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    text-align: center;
}

.contact-option i {
    font-size: 3rem;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.contact-option h3 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
}

.contact-option p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* ===================================
   法律页面样式
   =================================== */
.legal-content {
    padding: var(--spacing-3xl) 0;
}

.legal-info {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    background: var(--color-bg-alt);
    border-radius: var(--radius-md);
}

.legal-info p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.legal-section {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
    line-height: 1.8;
}

.legal-section h2 {
    color: var(--color-dark);
    font-size: 1.8rem;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.legal-section h3 {
    color: var(--color-dark);
    font-size: 1.3rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.legal-section h4 {
    color: var(--color-dark);
    font-size: 1.1rem;
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.legal-section p {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.legal-section ul,
.legal-section ol {
    padding-left: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.legal-section li {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.legal-section strong {
    color: var(--color-dark);
    font-weight: 600;
}

.legal-section a {
    color: var(--color-primary);
    text-decoration: underline;
}

.legal-section a:hover {
    color: var(--color-accent-2);
}

.legal-notice {
    background: var(--color-bg-alt);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-info);
    display: flex;
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.legal-notice i {
    font-size: 1.5rem;
    color: var(--color-info);
    flex-shrink: 0;
}

.legal-notice.warning {
    background: rgba(255, 152, 0, 0.1);
    border-left-color: var(--color-warning);
}

.legal-notice.warning i {
    color: var(--color-warning);
}

.legal-notice.important {
    background: rgba(244, 67, 54, 0.1);
    border-left-color: var(--color-error);
}

.legal-notice.important i {
    color: var(--color-error);
}

.legal-notice p {
    margin: 0;
}

.legal-notice ul {
    margin-top: var(--spacing-sm);
    margin-bottom: 0;
}

.related-links {
    background: var(--gradient-hero);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-3xl);
}

.related-links h3 {
    color: var(--color-dark);
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.link-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

.link-card i {
    font-size: 2rem;
    color: var(--color-primary);
}

.link-card span {
    color: var(--color-dark);
    font-weight: 600;
}

/* ===================================
   响应式 - 新增页面
   =================================== */
@media (max-width: 1024px) {
    .manual-content .container {
        grid-template-columns: 1fr;
    }
    
    .manual-sidebar {
        display: none;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: calc(72px + var(--spacing-lg)) 0 var(--spacing-lg);
    }
    
    .page-header-content h1 {
        font-size: 1.8rem;
    }
    
    .categories-grid,
    .help-options,
    .quick-links,
    .types-grid,
    .tips-grid,
    .contact-methods,
    .contact-options,
    .guide-steps,
    .resources-grid,
    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .form-actions .btn {
        width: 100%;
        justify-content: center;
    }
    
    .requirements-compare {
        grid-template-columns: 1fr;
    }
    
    .manual-nav-buttons {
        flex-direction: column;
    }
}

/* ===================================
   文章列表区
   =================================== */
.articles {
    padding: var(--spacing-3xl) 0;
    background: var(--color-bg-alt);
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.article-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.article-image {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

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

.article-category {
    position: absolute;
    top: 15px;
    left: 15px;
    background: var(--gradient-primary);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 600;
}

.article-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.article-meta span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.article-meta i {
    color: var(--color-primary);
}

.article-content h3 {
    margin-bottom: var(--spacing-md);
    font-size: 1.3rem;
    line-height: 1.4;
}

.article-content h3 a {
    color: var(--color-dark);
    transition: var(--transition-fast);
}

.article-content h3 a:hover {
    color: var(--color-primary);
}

.article-content > p {
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.read-more {
    color: var(--color-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
    align-self: flex-start;
}

.read-more:hover {
    gap: 0.75rem;
    color: var(--color-accent-2);
}

/* ===================================
   文章详情页
   =================================== */
.article-detail {
    padding: var(--spacing-3xl) 0;
}

.article-detail .container {
    max-width: 900px;
}

.article-header {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-xl);
}

.article-header h1 {
    font-size: 2.5rem;
    color: var(--color-dark);
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.article-info {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text-light);
}

.article-info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.article-tag {
    background: var(--color-bg-alt);
    color: var(--color-text);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

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

.article-body {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-xl);
}

.article-body h2 {
    color: var(--color-dark);
    font-size: 1.8rem;
    margin: var(--spacing-xl) 0 var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-border);
}

.article-body h2:first-child {
    margin-top: 0;
}

.article-body h3 {
    color: var(--color-dark);
    font-size: 1.4rem;
    margin: var(--spacing-lg) 0 var(--spacing-md);
}

.article-body p {
    color: var(--color-text);
    line-height: 1.9;
    margin-bottom: var(--spacing-lg);
}

.article-body ul,
.article-body ol {
    padding-left: 1.8rem;
    margin-bottom: var(--spacing-lg);
}

.article-body li {
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

.article-body strong {
    color: var(--color-dark);
    font-weight: 600;
}

.article-body a {
    color: var(--color-primary);
    text-decoration: underline;
}

.article-body a:hover {
    color: var(--color-accent-2);
}

.article-body blockquote {
    background: var(--color-bg-alt);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-md);
}

.article-body blockquote p {
    margin: 0;
    font-style: italic;
}

.article-body img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--spacing-lg) 0;
}

.article-body code {
    background: var(--color-dark);
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.article-body pre {
    background: var(--color-dark);
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

.article-body pre code {
    background: none;
    padding: 0;
}

.article-nav {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.article-nav-item {
    flex: 1;
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.article-nav-item:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.article-nav-item.prev {
    text-align: left;
}

.article-nav-item.next {
    text-align: right;
}

.article-nav-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-text-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.article-nav-item.next .article-nav-label {
    justify-content: flex-end;
}

.article-nav-title {
    color: var(--color-dark);
    font-weight: 600;
    font-size: 1.1rem;
}

.related-articles {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.related-articles h2 {
    color: var(--color-dark);
    margin-bottom: var(--spacing-lg);
}

.related-articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.related-article-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.related-article-item:hover {
    background: var(--color-bg-alt);
}

.related-article-image {
    width: 80px;
    height: 80px;
    flex-shrink: 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.related-article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.related-article-info h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.related-article-info h3 a {
    color: var(--color-dark);
}

.related-article-info h3 a:hover {
    color: var(--color-primary);
}

.related-article-info .article-meta {
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .article-header h1 {
        font-size: 1.8rem;
    }
    
    .article-body {
        padding: var(--spacing-lg);
    }
    
    .article-nav {
        flex-direction: column;
    }
    
    .article-nav-item.next {
        text-align: left;
    }
    
    .article-nav-item.next .article-nav-label {
        justify-content: flex-start;
    }
    
    .related-articles-grid {
        grid-template-columns: 1fr;
    }
}