/* ===================================
   哔咔漫画 - 优化样式文件
   现代化设计，SEO友好，响应式布局
   =================================== */

/* ========== 基础重置与变量 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 */
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #ec4899;
    --accent-color: #f59e0b;
    
    /* 文字颜色 */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    
    /* 背景颜色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-dark: #111827;
    --bg-gradient: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    --bg-gradient-light: linear-gradient(135deg, #818cf8 0%, #f472b6 100%);
    
    /* 边框与阴影 */
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 尺寸 */
    --max-width: 1280px;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 24px;
    
    /* 过渡动画 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", "PingFang SC", "Hiragino Sans GB", sans-serif;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 导航栏 ========== */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.navbar {
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
}

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

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

.logo-img {
    width: 56px;
    height: 56px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    object-fit: cover;
    transition: var(--transition-base);
}

.logo:hover .logo-img {
    box-shadow: var(--shadow-lg);
    transform: scale(1.05);
}

.logo-text-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.logo-text {
    font-size: 1.5rem;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.nav-menu li a {
    padding: 0.625rem 1.25rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    color: var(--text-primary);
    position: relative;
    transition: var(--transition-base);
}

.nav-menu li a:hover,
.nav-menu li a.active {
    color: var(--primary-color);
    background: var(--bg-secondary);
}

.nav-menu li a.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 2px;
    background: var(--bg-gradient);
    border-radius: 2px;
}

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

.menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-base);
}

/* ========== Hero 区域 ========== */
.hero {
    position: relative;
    padding: 6rem 0;
    background: var(--bg-gradient);
    color: var(--text-white);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
}

.stat-label {
    font-size: 0.875rem;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-image {
    position: relative;
    animation: fadeInRight 1s ease;
}

.hero-image img {
    width: 100%;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-2xl);
    border: 4px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-base);
}

.hero-image:hover img {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 30px 60px -12px rgba(0, 0, 0, 0.4);
}

.hero-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 0.75rem 1.25rem;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    animation: pulse 2s infinite;
}

.badge-icon {
    font-size: 1.25rem;
}

/* ========== 按钮样式 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition-base);
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    background: var(--bg-secondary);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    border-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--text-white);
    transform: translateY(-2px);
}

/* ========== 区域标题 ========== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 1rem;
    background: var(--bg-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.section-footer {
    text-align: center;
    margin-top: 3rem;
}

/* ========== 介绍区域 ========== */
.intro-section {
    padding: 6rem 0;
    background: var(--bg-primary);
}

.intro-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.intro-image {
    position: relative;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.intro-image img {
    width: 100%;
    transition: var(--transition-slow);
}

.intro-image:hover img {
    transform: scale(1.05);
}

.intro-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    color: var(--text-white);
    padding: 2rem;
    transform: translateY(100%);
    transition: var(--transition-base);
}

.intro-image:hover .intro-overlay {
    transform: translateY(0);
}

.intro-text {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.intro-paragraph h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.intro-paragraph p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1.0625rem;
}

.intro-paragraph strong {
    color: var(--primary-color);
    font-weight: 600;
}

.link-more {
    color: var(--primary-color);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1rem;
}

.link-more:hover {
    gap: 1rem;
}

.link-more span {
    transition: var(--transition-base);
}

/* ========== 功能卡片 ========== */
.features-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

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

.feature-card {
    background: var(--bg-primary);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 1.5rem;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-base);
}

.feature-card:hover .feature-icon img {
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.feature-card strong {
    color: var(--primary-color);
    font-weight: 600;
}

.feature-list {
    margin-bottom: 1.5rem;
}

.feature-list li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.feature-link:hover {
    gap: 1rem;
}

/* ========== 热门推荐 ========== */
.hot-section {
    padding: 6rem 0;
    background: var(--bg-primary);
}

.comics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 2rem;
}

.comic-card {
    background: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

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

.comic-image {
    position: relative;
    width: 100%;
    padding-top: 140%;
    overflow: hidden;
    background: var(--bg-secondary);
}

.comic-image img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

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

.comic-overlay {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 2;
}

.comic-status {
    background: var(--primary-color);
    color: var(--text-white);
    padding: 0.375rem 0.875rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    box-shadow: var(--shadow-md);
}

.comic-status.completed {
    background: var(--accent-color);
}

.comic-info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    flex-grow: 1;
}

.comic-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.comic-author {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.comic-desc {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.comic-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
}

.comic-views {
    color: var(--text-secondary);
}

.comic-rating {
    color: var(--accent-color);
    font-weight: 600;
}

/* ========== 分类区域 ========== */
.categories-section {
    padding: 6rem 0;
    background: var(--bg-secondary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.5rem;
}

.category-card {
    background: var(--bg-primary);
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius-lg);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    background: var(--bg-gradient);
    color: var(--text-white);
}

.category-icon {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.category-card:hover .category-icon {
    transform: scale(1.1) rotate(5deg);
}

.category-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.category-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.category-card p {
    font-size: 0.875rem;
    opacity: 0.8;
}

.category-count {
    font-size: 0.75rem;
    padding: 0.375rem 0.875rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

/* ========== 优势区域 ========== */
.advantages-section {
    padding: 6rem 0;
    background: var(--bg-primary);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.advantage-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    transition: var(--transition-base);
    border: 1px solid var(--border-color);
}

.advantage-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background: var(--bg-primary);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    overflow: hidden;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition-base);
}

.advantage-item:hover .advantage-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.advantage-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.advantage-item h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.advantage-item p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 0.9375rem;
}

.advantage-item strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* ========== CTA 区域 ========== */
.cta-section {
    padding: 6rem 0;
    background: var(--bg-gradient);
    color: var(--text-white);
    text-align: center;
}

.cta-content h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
}

.cta-content p {
    font-size: 1.125rem;
    max-width: 700px;
    margin: 0 auto 2.5rem;
    opacity: 0.95;
    line-height: 1.8;
}

.cta-content strong {
    font-weight: 700;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    font-size: 1.5rem;
    font-weight: 700;
}

.footer-logo img {
    width: 48px;
    height: 48px;
    border-radius: var(--border-radius);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.footer-section strong {
    color: var(--text-white);
    font-weight: 600;
}

.footer-section h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-white);
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

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

.footer-section ul li a:hover {
    color: var(--text-white);
    padding-left: 0.5rem;
}

.footer-social {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 1.5rem;
}

.footer-social a {
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    transition: var(--transition-base);
}

.footer-social a:hover {
    background: rgba(255, 255, 255, 0.2);
}

.contact-list li {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 0.75rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
}

.footer-bottom p {
    margin: 0.5rem 0;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: underline;
}

.footer-bottom a:hover {
    color: var(--text-white);
}

/* ========== 动画 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .hero-image {
        order: -1;
    }
    
    .intro-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 1.5rem;
        box-shadow: var(--shadow-lg);
        display: none;
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: 4rem 0;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
    
    .section-header {
        margin-bottom: 3rem;
    }
    
    .intro-section,
    .features-section,
    .hot-section,
    .categories-section,
    .advantages-section,
    .cta-section {
        padding: 4rem 0;
    }
    
    .features-grid,
    .comics-grid,
    .categories-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 1.25rem;
    }
    
    .logo-subtitle {
        font-size: 0.625rem;
    }
    
    .logo-img {
        width: 48px;
        height: 48px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .feature-card,
    .comic-card,
    .category-card {
        padding: 1.5rem;
    }
}

/* ========== 内页样式 ========== */
/* 面包屑导航 */
.breadcrumb {
    background: var(--bg-secondary);
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9375rem;
}

.breadcrumb .container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb a {
    color: var(--primary-color);
    font-weight: 500;
    transition: var(--transition-base);
}

.breadcrumb a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.breadcrumb span {
    color: var(--text-secondary);
}

.breadcrumb .separator {
    color: var(--text-light);
    margin: 0 0.5rem;
}

/* 页面头部 */
.page-header {
    background: var(--bg-gradient);
    color: var(--text-white);
    padding: 4rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><defs><pattern id="grid" width="40" height="40" patternUnits="userSpaceOnUse"><path d="M 40 0 L 0 0 0 40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.page-header .container {
    position: relative;
    z-index: 1;
}

.page-header h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-white);
}

.page-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    opacity: 0.95;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

/* 主内容区域 */
.main-content {
    min-height: calc(100vh - 400px);
    padding: 4rem 0;
}

/* ========== 关于我们页面 ========== */
.about-content {
    padding: 0;
}

.about-section {
    margin-bottom: 4rem;
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.about-section:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.about-section:last-child {
    margin-bottom: 0;
}

.about-section h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.75rem;
    display: inline-block;
}

.about-image-wrapper {
    width: 100%;
    margin-bottom: 2rem;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image-wrapper img {
    width: 100%;
    height: auto;
    transition: var(--transition-slow);
}

.about-section:hover .about-image-wrapper img {
    transform: scale(1.03);
}

.about-section p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 1.0625rem;
    margin-bottom: 1.5rem;
}

.about-section p:last-child {
    margin-bottom: 0;
}

.about-section strong {
    color: var(--primary-color);
    font-weight: 600;
}

.advantage-list {
    list-style: none;
    margin-top: 1.5rem;
}

.advantage-list li {
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition-base);
    line-height: 1.8;
    color: var(--text-secondary);
    font-size: 1.0625rem;
}

.advantage-list li:hover {
    background: var(--bg-tertiary);
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.advantage-list li strong {
    color: var(--primary-color);
    font-weight: 600;
    margin-right: 0.5rem;
}

/* ========== 分类详情页面 ========== */
.categories-detail {
    padding: 0;
}

.category-detail-item {
    margin-bottom: 4rem;
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

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

.category-detail-item:hover {
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
    transform: translateY(-3px);
}

.category-detail-item h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 2rem;
    color: var(--text-primary);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.75rem;
    display: inline-block;
    width: 100%;
}

.category-detail-image {
    width: 100%;
    margin-bottom: 2rem;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.category-detail-image img {
    width: 100%;
    height: auto;
    transition: var(--transition-slow);
}

.category-detail-item:hover .category-detail-image img {
    transform: scale(1.03);
}

.category-content {
    line-height: 1.9;
}

.category-content p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    margin-bottom: 1.5rem;
    line-height: 1.9;
}

.category-content p:last-child {
    margin-bottom: 0;
}

.category-content strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* ========== 排行榜页面 ========== */
.ranking-content {
    padding: 0;
}

.ranking-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.ranking-list {
    background: var(--bg-primary);
    padding: 2.5rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.ranking-list:hover {
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
    transform: translateY(-3px);
}

.ranking-list h2 {
    font-size: clamp(1.5rem, 2.5vw, 1.875rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.75rem;
    display: inline-block;
}

.ranking-list ol {
    list-style: none;
    counter-reset: ranking-counter;
}

.ranking-list li {
    display: flex;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
    counter-increment: ranking-counter;
    transition: var(--transition-base);
}

.ranking-list li:last-child {
    border-bottom: none;
}

.ranking-list li:hover {
    background: var(--bg-secondary);
    padding-left: 0.5rem;
    border-radius: var(--border-radius);
}

.rank-number {
    width: 40px;
    height: 40px;
    background: var(--bg-gradient);
    color: var(--text-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.125rem;
    margin-right: 1.25rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-md);
}

.ranking-list li:nth-child(1) .rank-number {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
}

.ranking-list li:nth-child(2) .rank-number {
    background: linear-gradient(135deg, #94a3b8 0%, #64748b 100%);
}

.ranking-list li:nth-child(3) .rank-number {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
}

.rank-title {
    flex: 1;
    font-weight: 600;
    font-size: 1.0625rem;
    color: var(--text-primary);
}

.rank-views {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    font-weight: 500;
}

.ranking-intro {
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.ranking-intro-image {
    width: 100%;
    margin-bottom: 2rem;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.ranking-intro-image img {
    width: 100%;
    height: auto;
    transition: var(--transition-slow);
}

.ranking-intro:hover .ranking-intro-image img {
    transform: scale(1.03);
}

.ranking-intro h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.75rem;
    display: inline-block;
}

.ranking-intro p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: 1.0625rem;
    margin-bottom: 1.5rem;
}

.ranking-intro p:last-child {
    margin-bottom: 0;
}

.ranking-intro strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* ========== 联系我们页面 ========== */
.contact-section {
    padding: 0;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 3rem;
}

.contact-info {
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    height: fit-content;
}

.contact-info h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 2rem;
    color: var(--text-primary);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.75rem;
    display: inline-block;
}

.contact-item {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.contact-item:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.contact-item h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-item p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    line-height: 1.8;
    margin-top: 0.5rem;
}

.contact-item p:first-of-type {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.125rem;
    margin-top: 0;
}

.contact-form-wrapper {
    background: var(--bg-primary);
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.contact-form-wrapper h2 {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 2rem;
    color: var(--text-primary);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.75rem;
    display: inline-block;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-family: inherit;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: var(--transition-base);
    width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--bg-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 150px;
    line-height: 1.7;
}

.contact-form-wrapper > p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-size: 1.0625rem;
}

.contact-form .btn {
    align-self: flex-start;
    margin-top: 0.5rem;
}

.form-message {
    padding: 1rem 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    font-weight: 500;
    animation: fadeInUp 0.3s ease;
}

.form-message.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.form-message.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

.form-group.error input,
.form-group.error select,
.form-group.error textarea {
    border-color: #ef4444;
}

.error-message {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: block;
}

/* ========== 返回顶部按钮 ========== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--bg-gradient);
    color: var(--text-white);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-base);
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

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

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

/* ========== 动画增强 ========== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* ========== 性能优化 ========== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========== 打印样式 ========== */
@media print {
    .header,
    .footer,
    .hero-buttons,
    .cta-section,
    .back-to-top {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}

/* ========== 响应式优化 - 内页 ========== */
@media (max-width: 1024px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .ranking-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 3rem 0;
    }
    
    .main-content {
        padding: 2rem 0;
    }
    
    .about-section,
    .category-detail-item,
    .ranking-list,
    .ranking-intro,
    .contact-info,
    .contact-form-wrapper {
        padding: 2rem;
    }
    
    .advantage-list li {
        padding: 0.875rem 1.25rem;
    }
    
    .back-to-top {
        width: 45px;
        height: 45px;
        bottom: 1.5rem;
        right: 1.5rem;
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .about-section,
    .category-detail-item,
    .ranking-list,
    .ranking-intro,
    .contact-info,
    .contact-form-wrapper {
        padding: 1.5rem;
    }
    
    .about-section h2,
    .category-detail-item h2,
    .ranking-intro h2,
    .contact-info h2,
    .contact-form-wrapper h2 {
        font-size: 1.5rem;
    }
}