/* 
 * c7娱乐 - 主样式表
 * 独特的紫金配色方案 + 现代化设计
 * 2026年最新SEO优化版本
 */

/* ===== CSS变量定义 ===== */
:root {
    --primary-purple: #8B2BE2;
    --secondary-gold: #FFD700;
    --accent-magenta: #E91E8C;
    --dark-bg: #0D0D1A;
    --card-bg: #1A1A2E;
    --text-primary: #FFFFFF;
    --text-secondary: #B8B8D0;
    --gradient-start: #8B2BE2;
    --gradient-end: #E91E8C;
    --success-green: #00C853;
    --warning-orange: #FF9100;
    --border-radius: 16px;
    --shadow-glow: 0 0 30px rgba(139, 43, 226, 0.3);
    --transition-smooth: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ===== 全局重置 ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', 'Noto Sans SC', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.8;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ===== 排版系统 ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }

p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

a {
    color: var(--secondary-gold);
    text-decoration: none;
    transition: var(--transition-smooth);
}

a:hover {
    color: var(--accent-magenta);
}

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

/* ===== 布局容器 ===== */
.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 5rem 0;
}

.section-alt {
    background: linear-gradient(180deg, var(--card-bg) 0%, var(--dark-bg) 100%);
}

/* ===== 顶部导航 ===== */
.site-header {
    background: rgba(13, 13, 26, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid rgba(139, 43, 226, 0.3);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.site-logo img {
    height: 50px;
    width: auto;
}

.site-logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--secondary-gold), var(--accent-magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.main-nav {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.main-nav a {
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    color: var(--text-primary);
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.main-nav a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: var(--secondary-gold);
    transition: var(--transition-smooth);
    transform: translateX(-50%);
}

.main-nav a:hover::before {
    width: 80%;
}

.main-nav a:hover {
    color: var(--secondary-gold);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: var(--text-primary) !important;
    border-radius: 50px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: var(--shadow-glow);
    transition: var(--transition-smooth);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(139, 43, 226, 0.5);
}

/* ===== 移动端菜单 ===== */
.mobile-menu-toggle {
    display: none;
    background: transparent;
    border: 2px solid var(--secondary-gold);
    color: var(--secondary-gold);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.5rem;
}

@media (max-width: 992px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .main-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        background: var(--card-bg);
        padding: 1rem;
        border-radius: var(--border-radius);
        margin-top: 1rem;
    }
    
    .main-nav.active {
        display: flex;
    }
    
    .main-nav a {
        padding: 1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
}

/* ===== Hero区域 ===== */
.hero-section {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(13, 13, 26, 0.9), rgba(26, 26, 46, 0.9)),
                url('../images/hero-banner.webp') center/cover no-repeat;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(139, 43, 226, 0.15) 0%, transparent 50%);
    animation: pulse-glow 8s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

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

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    margin-bottom: 1.5rem;
    text-shadow: 0 0 30px rgba(139, 43, 226, 0.5);
}

.hero-title span {
    background: linear-gradient(135deg, var(--secondary-gold), var(--accent-magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-secondary {
    padding: 1rem 2rem;
    border: 2px solid var(--secondary-gold);
    color: var(--secondary-gold);
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-secondary:hover {
    background: var(--secondary-gold);
    color: var(--dark-bg);
}

/* ===== 面包屑导航 ===== */
.breadcrumb {
    padding: 1rem 0;
    background: rgba(26, 26, 46, 0.5);
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    flex-wrap: wrap;
}

.breadcrumb-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.breadcrumb-list li::after {
    content: '›';
    color: var(--primary-purple);
}

.breadcrumb-list li:last-child::after {
    content: '';
}

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

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

/* ===== 游戏卡片网格 ===== */
.games-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.game-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition-smooth);
    border: 1px solid rgba(139, 43, 226, 0.2);
}

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

.game-card-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

.game-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

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

.game-card-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.game-card-content {
    padding: 1.5rem;
}

.game-card-title {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.game-card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.game-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.game-rtp {
    color: var(--success-green);
    font-weight: 600;
}

.game-card-link {
    color: var(--secondary-gold);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.game-card-link:hover {
    color: var(--accent-magenta);
}

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

.feature-box {
    background: linear-gradient(145deg, var(--card-bg), rgba(139, 43, 226, 0.1));
    padding: 2.5rem;
    border-radius: var(--border-radius);
    text-align: center;
    border: 1px solid rgba(139, 43, 226, 0.2);
    transition: var(--transition-smooth);
}

.feature-box:hover {
    border-color: var(--secondary-gold);
    transform: translateY(-5px);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.feature-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

/* ===== 支付方式 ===== */
.payment-section {
    background: var(--card-bg);
    padding: 4rem 0;
}

.payment-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    margin-top: 2rem;
}

.payment-item {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem 2rem;
    border-radius: 12px;
    text-align: center;
    min-width: 150px;
    transition: var(--transition-smooth);
}

.payment-item:hover {
    background: rgba(139, 43, 226, 0.2);
    transform: scale(1.05);
}

.payment-item img {
    height: 40px;
    margin: 0 auto 0.75rem;
}

.payment-item span {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== 用户评论 ===== */
.reviews-section {
    padding: 5rem 0;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.review-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--secondary-gold);
    transition: var(--transition-smooth);
}

.review-card:hover {
    box-shadow: var(--shadow-glow);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.review-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
}

.review-author {
    flex: 1;
}

.review-name {
    font-weight: 700;
    font-size: 1.1rem;
}

.review-location {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.review-rating {
    color: var(--secondary-gold);
    font-size: 1.25rem;
    letter-spacing: 2px;
}

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

.review-date {
    color: var(--text-secondary);
    font-size: 0.85rem;
    opacity: 0.7;
}

/* ===== FAQ手风琴 ===== */
.faq-section {
    padding: 5rem 0;
    background: linear-gradient(180deg, var(--dark-bg), var(--card-bg));
}

.faq-list {
    max-width: 900px;
    margin: 3rem auto 0;
}

.faq-item {
    background: var(--card-bg);
    margin-bottom: 1rem;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid rgba(139, 43, 226, 0.2);
}

.faq-question {
    width: 100%;
    padding: 1.5rem 2rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-smooth);
}

.faq-question:hover {
    background: rgba(139, 43, 226, 0.1);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--secondary-gold);
    transition: var(--transition-smooth);
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

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

.faq-answer-content {
    padding: 0 2rem 1.5rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== 关于我们 ===== */
.about-section {
    padding: 5rem 0;
}

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

@media (max-width: 992px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
}

.about-image {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-glow);
}

.about-content h2 {
    margin-bottom: 1.5rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(139, 43, 226, 0.1);
    border-radius: 12px;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--secondary-gold), var(--accent-magenta));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* ===== 牌照区域 ===== */
.license-section {
    background: var(--card-bg);
    padding: 4rem 0;
    text-align: center;
}

.license-badges {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 3rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.license-badge {
    background: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius);
    transition: var(--transition-smooth);
}

.license-badge:hover {
    background: rgba(139, 43, 226, 0.2);
}

.license-badge img {
    height: 80px;
    margin: 0 auto;
}

/* ===== 客服支持 ===== */
.support-section {
    padding: 5rem 0;
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.support-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition-smooth);
    border: 1px solid transparent;
}

.support-card:hover {
    border-color: var(--secondary-gold);
    transform: translateY(-5px);
}

.support-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
}

/* ===== 负责任博彩 ===== */
.responsible-gaming {
    background: linear-gradient(135deg, rgba(200, 0, 0, 0.1), rgba(139, 43, 226, 0.1));
    padding: 4rem 0;
    border-top: 3px solid var(--warning-orange);
}

.responsible-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.responsible-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.responsible-links a {
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-secondary);
}

.responsible-links a:hover {
    background: rgba(139, 43, 226, 0.3);
    color: var(--text-primary);
}

/* ===== 页脚 ===== */
.site-footer {
    background: linear-gradient(180deg, var(--card-bg), #0a0a14);
    padding: 4rem 0 2rem;
    border-top: 1px solid rgba(139, 43, 226, 0.3);
}

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

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-brand {
    max-width: 350px;
}

.footer-brand img {
    height: 50px;
    margin-bottom: 1.5rem;
}

.footer-brand p {
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    width: 45px;
    height: 45px;
    background: rgba(139, 43, 226, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: var(--transition-smooth);
}

.footer-social a:hover {
    background: var(--secondary-gold);
    color: var(--dark-bg);
}

.footer-column h4 {
    color: var(--secondary-gold);
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

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

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

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: var(--transition-smooth);
}

.footer-links a:hover {
    color: var(--secondary-gold);
    padding-left: 5px;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-payments {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.footer-payments img {
    height: 30px;
    opacity: 0.7;
    transition: var(--transition-smooth);
}

.footer-payments img:hover {
    opacity: 1;
}

.footer-age {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-age img {
    height: 50px;
}

.copyright {
    width: 100%;
    text-align: center;
    padding-top: 2rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== 内页样式 ===== */
.page-header {
    background: linear-gradient(135deg, rgba(139, 43, 226, 0.3), rgba(233, 30, 140, 0.2)),
                var(--card-bg);
    padding: 4rem 0;
    text-align: center;
}

.page-title {
    margin-bottom: 1rem;
}

.page-subtitle {
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
}

.content-section {
    padding: 4rem 0;
}

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

.content-wrapper h2 {
    color: var(--secondary-gold);
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid rgba(139, 43, 226, 0.3);
}

.content-wrapper h3 {
    color: var(--text-primary);
    margin-top: 2rem;
}

.content-wrapper ul, .content-wrapper ol {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.content-wrapper li {
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.content-image {
    margin: 2rem 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-glow);
}

.content-image img {
    width: 100%;
}

.content-image figcaption {
    background: var(--card-bg);
    padding: 1rem;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== 信息表格 ===== */
.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.info-table th, .info-table td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.info-table th {
    background: rgba(139, 43, 226, 0.2);
    color: var(--secondary-gold);
    font-weight: 600;
}

.info-table tr:hover {
    background: rgba(139, 43, 226, 0.1);
}

/* ===== 提示框 ===== */
.tip-box {
    background: linear-gradient(135deg, rgba(139, 43, 226, 0.2), rgba(233, 30, 140, 0.1));
    border-left: 4px solid var(--secondary-gold);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.tip-box-title {
    color: var(--secondary-gold);
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.warning-box {
    background: rgba(255, 145, 0, 0.1);
    border-left-color: var(--warning-orange);
}

.warning-box .tip-box-title {
    color: var(--warning-orange);
}

/* ===== 作者信息 ===== */
.author-box {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin: 3rem 0;
    display: flex;
    gap: 2rem;
    align-items: center;
}

@media (max-width: 768px) {
    .author-box {
        flex-direction: column;
        text-align: center;
    }
}

.author-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    flex-shrink: 0;
}

.author-info h4 {
    color: var(--secondary-gold);
    margin-bottom: 0.5rem;
}

.author-title {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.author-bio {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== APP下载页面 ===== */
.app-hero {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    padding: 5rem 0;
    text-align: center;
}

.app-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 2rem;
}

.app-btn {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 12px;
    color: white;
    transition: var(--transition-smooth);
}

.app-btn:hover {
    background: rgba(0, 0, 0, 0.5);
    transform: scale(1.05);
}

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

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

.app-btn-text small {
    display: block;
    font-size: 0.75rem;
    opacity: 0.8;
}

.app-btn-text span {
    font-size: 1.25rem;
    font-weight: 700;
}

.app-features {
    padding: 5rem 0;
}

.app-screenshot {
    max-width: 300px;
    margin: 0 auto;
    border-radius: 30px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

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

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

/* ===== 响应式调整 ===== */
@media (max-width: 768px) {
    .section {
        padding: 3rem 0;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .hero-section {
        min-height: 60vh;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ===== 打印样式 ===== */
@media print {
    .site-header, .site-footer, .cta-button {
        display: none;
    }
    
    body {
        background: white;
        color: black;
    }
}