/* ============================================
   卡尔没有肌肉 官方网站样式表
   版本: 2.0.0
   更新日期: 2026-02-04
   ============================================ */

/* CSS变量定义 */
:root {
    --primary-color: #e63946;
    --secondary-color: #1d3557;
    --accent-color: #f4a261;
    --text-primary: #2b2d42;
    --text-secondary: #6c757d;
    --text-light: #f8f9fa;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-dark: #1a1a2e;
    --border-color: #dee2e6;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.16);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    --max-width: 1280px;
}

/* 基础重置 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-primary);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

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

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

a:hover {
    color: var(--secondary-color);
}

ul, ol {
    list-style: none;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

/* ============================================
   头部导航样式
   ============================================ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
}

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

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo-link {
    display: flex;
    align-items: center;
}

.site-logo {
    height: 42px;
    width: auto;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    display: inline-block;
    padding: 10px 18px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: rgba(230, 57, 70, 0.08);
}

.nav-link.active {
    color: var(--primary-color);
    background-color: rgba(230, 57, 70, 0.1);
}

.nav-link.cta-btn {
    background: linear-gradient(135deg, var(--primary-color), #d62839);
    color: var(--text-light);
    font-weight: 600;
    padding: 10px 24px;
}

.nav-link.cta-btn:hover {
    background: linear-gradient(135deg, #d62839, var(--primary-color));
    color: var(--text-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.mobile-menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    position: relative;
}

.menu-icon {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    transition: var(--transition-fast);
}

.menu-icon::before,
.menu-icon::after {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    position: absolute;
    left: 0;
    transition: var(--transition-fast);
}

.menu-icon::before {
    top: -8px;
}

.menu-icon::after {
    top: 8px;
}

/* ============================================
   主内容区域
   ============================================ */
.main-content {
    margin-top: 72px;
}

/* 英雄区域 */
.hero-section {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(29, 53, 87, 0.85), rgba(26, 26, 46, 0.75));
    z-index: -1;
}

.hero-content {
    max-width: var(--max-width);
    padding: 60px 24px;
    text-align: center;
    color: var(--text-light);
}

.hero-title {
    font-size: 3.2rem;
    font-weight: 800;
    margin-bottom: 20px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.3rem;
    opacity: 0.95;
    margin-bottom: 36px;
    max-width: 680px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    background: linear-gradient(135deg, var(--primary-color), #d62839);
    color: var(--text-light);
    padding: 16px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.hero-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(230, 57, 70, 0.4);
    color: var(--text-light);
}

/* 页面横幅 */
.page-banner {
    position: relative;
    height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.banner-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.6);
}

.banner-content {
    text-align: center;
    color: var(--text-light);
    padding: 24px;
}

.page-title {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 12px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
}

.page-subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* 面包屑导航 */
.breadcrumb-nav {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 16px 24px;
    background: var(--bg-secondary);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.breadcrumb-list li::after {
    content: '/';
    margin-left: 8px;
    color: var(--text-secondary);
}

.breadcrumb-list li:last-child::after {
    display: none;
}

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

.breadcrumb-list a:hover {
    color: var(--primary-color);
}

/* ============================================
   通用区块样式
   ============================================ */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 16px auto 0;
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* 频道介绍 */
.channel-intro {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

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

.intro-text {
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: 20px;
    text-align: justify;
}

/* 视频展示 */
.video-showcase {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.featured-video {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.video-player-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.main-video {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
}

.video-details {
    padding: 24px 0;
}

.video-title {
    font-size: 1.6rem;
    margin-bottom: 16px;
}

.video-desc {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.video-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.meta-item {
    font-size: 0.9rem;
    color: var(--text-secondary);
    padding: 6px 14px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
}

/* 视频列表 */
.video-list {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.video-card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.video-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.video-thumb {
    position: relative;
    overflow: hidden;
}

.video-thumb img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.video-card:hover .video-thumb img {
    transform: scale(1.08);
}

.video-info {
    padding: 20px;
}

.video-info .video-title {
    font-size: 1.1rem;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-info .video-desc {
    font-size: 0.9rem;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-rating {
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 600;
}

/* 创作者区域 */
.creators-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.creators-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.creator-card {
    background: var(--bg-primary);
    padding: 36px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.creator-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.creator-avatar {
    width: 100px;
    height: 100px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--primary-color);
}

.creator-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.creator-name {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.creator-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.creator-stats {
    font-size: 0.9rem;
    color: var(--primary-color);
    font-weight: 600;
}

/* 服务特色 */
.service-features,
.custom-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 40px;
}

.feature-item {
    background: var(--bg-secondary);
    padding: 28px;
    border-radius: var(--radius-md);
    text-align: center;
}

.feature-title {
    font-size: 1.15rem;
    margin-bottom: 12px;
    color: var(--secondary-color);
}

.feature-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* 会员权益 */
.membership-benefits {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    background: linear-gradient(135deg, var(--secondary-color), var(--bg-dark));
}

.membership-benefits .section-title {
    color: var(--text-light);
}

.membership-benefits .section-title::after {
    background: linear-gradient(90deg, var(--accent-color), var(--primary-color));
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.benefit-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    padding: 32px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    color: var(--text-light);
    transition: all var(--transition-normal);
}

.benefit-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-4px);
}

.benefit-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.benefit-card .benefit-title {
    font-size: 1.15rem;
    margin-bottom: 12px;
}

.benefit-card .benefit-desc {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* 内容分类 */
.content-categories {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.category-card {
    background: var(--bg-primary);
    padding: 36px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.category-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.category-title {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.category-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* 加入社区 */
.join-community {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

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

.join-text {
    font-size: 1.05rem;
    text-align: center;
    margin-bottom: 40px;
}

.join-benefits {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.join-benefits .benefit-item {
    background: var(--bg-secondary);
    padding: 28px;
    border-radius: var(--radius-md);
    text-align: center;
}

.join-benefits .benefit-title {
    font-size: 1.15rem;
    margin-bottom: 12px;
    color: var(--primary-color);
}

.join-benefits .benefit-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* 拍摄服务 */
.filming-service,
.custom-service {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

.service-content,
.custom-content {
    max-width: 900px;
    margin: 0 auto;
}

.service-text,
.custom-text {
    font-size: 1.05rem;
    line-height: 1.9;
    margin-bottom: 20px;
    text-align: justify;
}

/* ============================================
   下载页面样式
   ============================================ */
.download-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    text-align: center;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 40px;
}

.download-btn {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 36px;
    border-radius: var(--radius-md);
    color: var(--text-light);
    font-weight: 600;
    transition: all var(--transition-normal);
}

.android-btn {
    background: linear-gradient(135deg, #3ddc84, #00a956);
}

.ios-btn {
    background: linear-gradient(135deg, #555, #333);
}

.download-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    color: var(--text-light);
}

.btn-icon {
    font-size: 2rem;
}

.btn-text {
    text-align: left;
}

.btn-label {
    display: block;
    font-size: 1.1rem;
}

.btn-version {
    display: block;
    font-size: 0.85rem;
    opacity: 0.8;
    font-weight: 400;
}

.download-badges {
    margin-top: 24px;
}

.download-badges img {
    margin: 0 auto;
}

/* 应用特色 */
.app-features {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.feature-card {
    background: var(--bg-primary);
    padding: 36px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.feature-card .feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-card .feature-title {
    font-size: 1.2rem;
    margin-bottom: 14px;
}

.feature-card .feature-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 应用截图 */
.app-screenshots {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

.screenshots-gallery {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

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

.screenshot-item img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    max-width: 280px;
}

.screenshot-item figcaption {
    margin-top: 16px;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* 安装指南 */
.install-guide {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.guide-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.guide-section {
    background: var(--bg-primary);
    padding: 32px;
    border-radius: var(--radius-md);
}

.guide-subtitle {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.guide-steps {
    list-style: decimal;
    padding-left: 24px;
}

.guide-steps li {
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

/* 系统要求 */
.system-requirements {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

.requirements-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.requirement-card {
    background: var(--bg-secondary);
    padding: 32px;
    border-radius: var(--radius-md);
}

.requirement-title {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.requirement-list {
    list-style: disc;
    padding-left: 24px;
}

.requirement-list li {
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 8px;
    color: var(--text-secondary);
}

/* 下载页FAQ */
.download-faq {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    background: var(--bg-secondary);
}

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

.faq-item {
    background: var(--bg-primary);
    margin-bottom: 16px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.faq-question {
    padding: 20px 24px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform var(--transition-fast);
}

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px 20px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   首页特定模块
   ============================================ */

/* 服务模块 */
.services-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.service-card {
    background: var(--bg-primary);
    padding: 36px 28px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.service-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 1.2rem;
    margin-bottom: 14px;
}

.service-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 案例展示 */
.cases-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    background: var(--bg-secondary);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.case-card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.case-image {
    overflow: hidden;
}

.case-image img {
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.case-card:hover .case-image img {
    transform: scale(1.08);
}

.case-info {
    padding: 24px;
}

.case-info h3 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.case-info p {
    font-size: 0.95rem;
    color: var(--text-secondary);
}

/* 明星合作 */
.stars-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

.stars-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.star-card {
    text-align: center;
    transition: all var(--transition-normal);
}

.star-card:hover {
    transform: translateY(-6px);
}

.star-image {
    width: 160px;
    height: 160px;
    margin: 0 auto 20px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--accent-color);
}

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

.star-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.star-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* FAQ区域 */
.faq-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
    background: var(--bg-secondary);
}

/* 用户评论 */
.reviews-section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px 24px;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.review-card {
    background: var(--bg-secondary);
    padding: 32px;
    border-radius: var(--radius-md);
    position: relative;
}

.review-card::before {
    content: '"';
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.2;
    position: absolute;
    top: 16px;
    left: 24px;
    line-height: 1;
}

.review-text {
    font-size: 0.95rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.review-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.author-info span {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ============================================
   页脚样式
   ============================================ */
.site-footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding-top: 60px;
}

.footer-main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px 48px;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
}

.footer-brand {
    max-width: 300px;
}

.footer-brand img {
    margin-bottom: 20px;
    filter: brightness(0) invert(1);
}

.footer-desc {
    font-size: 0.95rem;
    opacity: 0.8;
    line-height: 1.7;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.footer-title {
    font-size: 1.1rem;
    margin-bottom: 20px;
    color: var(--text-light);
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px;
    text-align: center;
}

.footer-age-restriction {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
}

.age-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: var(--text-light);
    font-weight: 700;
    border-radius: 50%;
    font-size: 0.9rem;
}

.age-text {
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer-copyright {
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .video-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .services-grid,
    .stars-grid,
    .benefits-grid,
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .featured-video {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 24px;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
        padding: 14px;
    }
    
    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .page-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .video-grid,
    .cases-grid,
    .reviews-grid,
    .creators-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .services-grid,
    .stars-grid,
    .benefits-grid,
    .categories-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .service-features,
    .custom-features,
    .join-benefits {
        grid-template-columns: 1fr;
    }
    
    .guide-content,
    .requirements-content {
        grid-template-columns: 1fr;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .download-btn {
        width: 100%;
        max-width: 320px;
        justify-content: center;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-nav {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-section {
        min-height: 480px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .page-banner {
        height: 240px;
    }
    
    .page-title {
        font-size: 1.6rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .video-grid,
    .cases-grid,
    .reviews-grid,
    .creators-grid {
        grid-template-columns: 1fr;
    }
    
    .screenshots-gallery {
        gap: 20px;
    }
    
    .screenshot-item img {
        max-width: 100%;
    }
}

/* 打印样式 */
@media print {
    .site-header,
    .site-footer,
    .mobile-menu-toggle,
    .download-btn,
    video {
        display: none !important;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }
}