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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(180deg, #4a90e2 0%, #2c5282 50%, #1a365d 100%);
    background-attachment: fixed;
    min-height: 100vh;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(74, 144, 226, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(44, 82, 130, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(26, 54, 93, 0.2) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* SEO优化样式 */
.section-description {
    font-size: 16px;
    line-height: 1.6;
    color: #e2e8f0;
    margin-bottom: 30px;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
}

.section-description strong {
    color: #ffd700;
    font-weight: 600;
}

.section-description em {
    color: #87ceeb;
    font-style: italic;
}

/* 标题层次优化 */
h1 strong {
    color: #ffd700;
}

h2 strong {
    color: #ffd700;
}

h3 strong {
    color: #1e90ff;
}

/* 强调文本样式 */
strong {
    font-weight: 600;
}

em {
    font-style: italic;
    color: #87ceeb;
}

/* 公告栏强调 */
.announcement-text strong {
    color: #fff;
    font-weight: 700;
}

.announcement-text em {
    color: #f0f8ff;
    font-style: italic;
}

/* 指导卡片标题优化 */
.instruction-card h3 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 18px;
}

.instruction-card h3 strong {
    color: #1e90ff;
}

/* 促销横幅标题优化 */
.promo-header h2 {
    font-size: 24px;
    color: #2c3e50;
    margin: 0;
    font-weight: 700;
}

.promo-header h2 strong {
    color: #1e90ff;
}

.trusted-badge em {
    color: white;
    font-style: italic;
}

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

/* 顶部公告栏 */
.announcement-bar {
    background: linear-gradient(135deg, #4a90e2, #357abd, #2c5282, #1a365d);
    background-size: 300% 300%;
    animation: gradientShift 6s ease infinite, slideDown 0.5s ease-out;
    color: white;
    padding: 12px 0;
    position: relative;
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.announcement-bar .container {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.announcement-bar i {
    margin-right: 10px;
    animation: pulse 2s infinite;
}

.announcement-text {
    font-weight: 500;
}

.close-announcement {
    position: absolute;
    right: 20px;
    background: none;
    border: none;
    color: white;
    font-size: 20px;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.close-announcement:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* 主标题区域 */
.header {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 40px 0;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 3s infinite;
}

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

.logo-section {
    flex: 1;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}

.logo-img {
    height: 80px;
    width: auto;
    object-fit: contain;
}

.logo h1 {
    font-size: 36px;
    background: linear-gradient(135deg, #fff, #f1c40f, #e74c3c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    letter-spacing: -0.5px;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    position: relative;
}

.logo h1::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, #4a90e2, #357abd, #2c5282);
    border-radius: 2px;
    animation: glow 2s ease-in-out infinite alternate;
}

.subtitle {
    color: #e2e8f0;
    font-size: 16px;
    margin-left: 55px;
}

.status-info {
    text-align: right;
}

.online-status {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    margin-bottom: 5px;
    font-weight: 600;
    color: #27ae60;
}

.status-dot {
    font-size: 12px;
    animation: blink 2s infinite;
}

.last-update {
    font-size: 14px;
    color: #e2e8f0;
}

/* 主要内容区域 */
.main-content {
    padding: 40px 0;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    color: white;
    margin-bottom: 25px;
    font-weight: 600;
}

.section-title i {
    color: #ffd700;
}


/* 重要提示 */
.important-notice {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 40px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-left: 5px solid #e74c3c;
}

.notice-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.notice-header i {
    color: #e74c3c;
    font-size: 20px;
}

.notice-header h3 {
    color: #2c3e50;
    font-size: 18px;
}

.notice-list {
    list-style: none;
    padding-left: 0;
}

.notice-list li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    color: #555;
}

.notice-list li::before {
    content: '•';
    color: #e74c3c;
    font-weight: bold;
    position: absolute;
    left: 0;
}

/* 促销横幅 */
.promo-banner {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 24px;
    padding: 35px;
    margin-bottom: 40px;
    box-shadow: 
        0 12px 40px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
    position: relative;
    overflow: hidden;
}

.promo-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #f093fb, #f5576c, #4facfe, #00f2fe);
    background-size: 300% 300%;
    animation: gradientShift 4s ease infinite;
}

.promo-banner::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(240, 147, 251, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

.promo-card {
    display: grid;
    grid-template-columns: auto 1fr auto;
    gap: 20px;
    align-items: center;
    margin-bottom: 20px;
}

.promo-logo {
    background: white;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.promo-logo-img {
    height: 40px;
    width: auto;
}

.promo-content {
    flex: 1;
}

.promo-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 8px;
}

.promo-header h3 {
    font-size: 24px;
    color: #2c3e50;
    margin: 0;
    font-weight: 700;
}

.trusted-badge {
    background: #27ae60;
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.promo-text {
    font-size: 18px;
    color: #2c3e50;
    margin: 0;
    font-weight: 600;
}

.promo-actions {
    text-align: right;
}

.promo-btn {
    background: linear-gradient(135deg, #56ab2f, #a8e6cf, #ff8a80);
    background-size: 200% 200%;
    animation: gradientMove 3s ease infinite;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 30px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    margin-bottom: 15px;
    display: block;
    width: 220px;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: 0 8px 20px rgba(86, 171, 47, 0.3);
}

.promo-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s ease;
}

.promo-btn:hover::before {
    left: 100%;
}

.promo-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 
        0 15px 30px rgba(86, 171, 47, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.3);
    background-size: 150% 150%;
}

.promo-btn:active {
    transform: translateY(-2px) scale(1.02);
}

.promo-details {
    text-align: right;
}

.details-link {
    color: #1e90ff;
    text-decoration: none;
    font-size: 14px;
    display: block;
    margin-bottom: 5px;
}

.details-link:hover {
    text-decoration: underline;
}

.last-used {
    font-size: 12px;
    color: #666;
    margin: 0;
}

.promo-description {
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.promo-description p {
    color: #555;
    line-height: 1.6;
    margin: 0;
    font-size: 14px;
}

/* 备用网址列表 */
.backup-links-section {
    margin-bottom: 40px;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

.link-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 30px;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, #4a90e2, #357abd, #2c5282);
    background-size: 200% 200%;
    animation: gradientMove 3s ease infinite;
}

.link-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.link-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.link-card:hover::after {
    opacity: 1;
}

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

.link-title {
    display: flex;
    align-items: center;
    gap: 10px;
}

.link-number {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 14px;
}

.link-name {
    font-size: 18px;
    font-weight: 600;
    color: #2c3e50;
}

.link-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.status-online {
    background: #d4edda;
    color: #155724;
}

.status-slow {
    background: #fff3cd;
    color: #856404;
}

.link-url {
    background: #f8f9fa;
    padding: 12px;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: #495057;
    margin-bottom: 15px;
    word-break: break-all;
}

.link-actions {
    display: flex;
    justify-content: center;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s ease;
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(135deg, #4a90e2, #357abd);
    color: white;
    flex: 1;
    justify-content: center;
    position: relative;
    overflow: hidden;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    font-size: 13px;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 
        0 10px 25px rgba(74, 144, 226, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.2);
    background: linear-gradient(135deg, #357abd, #4a90e2);
}

.btn-primary:active {
    transform: translateY(-1px) scale(1.02);
}



/* 使用说明 */
.instructions-section {
    margin-bottom: 40px;
}

.instructions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.instruction-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    box-shadow: 
        0 8px 32px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.5);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.instruction-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.instruction-card:hover {
    transform: translateY(-8px) scale(1.03);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.15),
        0 0 0 1px rgba(255, 255, 255, 0.3);
}

.instruction-card:hover::before {
    opacity: 1;
}

.instruction-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #4a90e2, #357abd, #2c5282);
    background-size: 200% 200%;
    animation: gradientMove 4s ease infinite;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    position: relative;
    box-shadow: 
        0 8px 20px rgba(74, 144, 226, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.instruction-icon::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #4a90e2, #357abd, #2c5282);
    background-size: 200% 200%;
    animation: gradientMove 4s ease infinite;
    border-radius: 50%;
    z-index: -1;
    filter: blur(8px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.instruction-card:hover .instruction-icon::before {
    opacity: 0.7;
}

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

.instruction-icon i {
    font-size: 24px;
    color: white;
}

.instruction-card h4 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 18px;
}

.instruction-card p {
    color: #666;
    font-size: 14px;
}

/* iOS安装指南 */
.ios-guide-section {
    margin-bottom: 40px;
}

.guide-description {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.guide-description p {
    color: #2c3e50;
    line-height: 1.6;
    margin: 0;
    font-size: 16px;
}

.guide-main {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 40px;
    align-items: start;
}

.guide-image {
    display: flex;
    justify-content: center;
}

.ios-mockup {
    position: relative;
}

.phone-frame {
    width: 200px;
    height: 350px;
    background: linear-gradient(135deg, #1e90ff, #0080ff);
    border-radius: 25px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
}

.screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #2c5282, #1e40af);
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.app-icon {
    font-size: 48px;
    margin-bottom: 15px;
    color: white;
}

.app-text {
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 20px;
    color: white;
}

.casino-icons {
    display: flex;
    gap: 15px;
    font-size: 24px;
}

.guide-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.step-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid #1e90ff;
}

.step-icon {
    background: #27ae60;
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    flex-shrink: 0;
}

.step-text {
    color: #2c3e50;
    line-height: 1.5;
    font-size: 14px;
}

.guide-footer {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.guide-footer p {
    color: #2c3e50;
    line-height: 1.6;
    margin: 0;
    font-size: 14px;
}

.app-features {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
}

.feature-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 3px solid #1e90ff;
}

.feature-label {
    font-weight: 600;
    color: #2c3e50;
    font-size: 14px;
}

.feature-value {
    color: #666;
    font-size: 14px;
    text-align: right;
    flex: 1;
    margin-left: 15px;
}

/* Android APK安装指南 */
.android-guide-section {
    margin-bottom: 40px;
}

.android-guide-content .guide-description {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.android-guide-content .guide-description p {
    color: #2c3e50;
    line-height: 1.6;
    margin: 0;
    font-size: 16px;
}

.android-guide-content .guide-main {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
    align-items: start;
}

.android-guide-content .guide-image {
    display: flex;
    justify-content: center;
}

.android-mockup {
    position: relative;
}

.android-mockup .phone-frame {
    width: 200px;
    height: 350px;
    background: linear-gradient(135deg, #4CAF50, #2E7D32);
    border-radius: 25px;
    padding: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    position: relative;
}

.android-mockup .screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #2c5282, #1e40af);
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.app-logo {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
    color: #1e90ff;
}

.install-text {
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 20px;
    color: white;
}

.phone-illustration {
    font-size: 48px;
}

.android-guide-content .guide-steps {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.android-guide-content .step-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
    border-left: 4px solid #4CAF50;
}

.android-guide-content .step-icon {
    background: #27ae60;
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    flex-shrink: 0;
}

.android-guide-content .step-text {
    color: #2c3e50;
    line-height: 1.5;
    font-size: 14px;
}

.android-guide-content .guide-footer {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.android-guide-content .guide-footer p {
    color: #2c3e50;
    line-height: 1.6;
    margin: 0;
    font-size: 14px;
}

.android-guide-content .app-features {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.android-guide-content .feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
}

.android-guide-content .feature-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 3px solid #4CAF50;
}

.android-guide-content .feature-label {
    font-weight: 600;
    color: #2c3e50;
    font-size: 14px;
}

.android-guide-content .feature-value {
    color: #666;
    font-size: 14px;
    text-align: right;
    flex: 1;
    margin-left: 15px;
}

/* 常见问题 */
.faq-section {
    margin-bottom: 40px;
}

.faq-list {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 
        0 12px 40px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
}

.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 0.6s ease;
}

.faq-item:hover::before {
    left: 100%;
}

.faq-question {
    padding: 25px 30px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-weight: 600;
    color: #2c3e50;
    position: relative;
    z-index: 1;
}

.faq-question:hover {
    background: rgba(102, 126, 234, 0.05);
    transform: translateX(5px);
}

.faq-question i {
    color: #667eea;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    font-size: 16px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 50%;
    box-shadow: 0 4px 10px rgba(102, 126, 234, 0.3);
}

.faq-item.active .faq-question i {
    transform: rotate(90deg) scale(1.1);
    box-shadow: 0 6px 15px rgba(102, 126, 234, 0.4);
}

.faq-answer {
    padding: 0 30px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    background: rgba(102, 126, 234, 0.02);
}

.faq-item.active .faq-answer {
    padding: 0 30px 25px;
    max-height: 300px;
}

.faq-answer p {
    color: #555;
    line-height: 1.7;
    font-size: 15px;
    margin-top: 10px;
}

/* 页脚 */
.footer {
    background: rgba(44, 62, 80, 0.95);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: white;
    padding: 50px 0 30px;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #667eea, #764ba2, #f093fb, #667eea);
    background-size: 300% 300%;
    animation: gradientShift 6s ease infinite;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    color: #ffd700;
    margin-bottom: 15px;
    font-size: 18px;
}

.contact-info p {
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info i {
    width: 20px;
    color: #ffd700;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: #34495e;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: #667eea;
    transform: translateY(-3px);
}

.disclaimer {
    font-size: 14px;
    line-height: 1.6;
    color: #bdc3c7;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
}

.footer-bottom p {
    margin-bottom: 5px;
    font-size: 14px;
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2, #f093fb);
    background-size: 200% 200%;
    animation: gradientMove 4s ease infinite;
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 
        0 8px 25px rgba(102, 126, 234, 0.4),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    opacity: 0;
    visibility: hidden;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.back-to-top::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #667eea, #764ba2, #f093fb);
    background-size: 200% 200%;
    animation: gradientMove 4s ease infinite;
    border-radius: 50%;
    z-index: -1;
    filter: blur(10px);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    animation: float 3s ease-in-out infinite;
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: 
        0 15px 35px rgba(102, 126, 234, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.3);
}

.back-to-top:hover::before {
    opacity: 0.8;
}

.back-to-top:active {
    transform: translateY(-3px) scale(1.05);
}



/* 动画 */
@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes blink {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* 新增现代化动画 */
@keyframes gradientShift {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}

@keyframes gradientMove {
    0% {
        background-position: 0% 0%;
    }
    50% {
        background-position: 100% 100%;
    }
    100% {
        background-position: 0% 0%;
    }
}

@keyframes shimmer {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

@keyframes glow {
    0% {
        box-shadow: 0 0 5px rgba(241, 196, 15, 0.5);
    }
    100% {
        box-shadow: 0 0 20px rgba(241, 196, 15, 0.8), 0 0 30px rgba(231, 76, 60, 0.6);
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
}

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

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .header .container {
        flex-direction: column;
        text-align: center;
        gap: 20px;
    }
    
    .logo h1 {
        font-size: 24px;
    }
    
    .subtitle {
        margin-left: 0;
    }
    
    .status-info {
        text-align: center;
    }
    
    .promo-card {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 15px;
    }
    
    .promo-actions {
        text-align: center;
    }
    
    .promo-btn {
        width: 100%;
    }
    
    .guide-main {
        grid-template-columns: 1fr;
        gap: 25px;
        text-align: center;
    }
    
    .android-guide-content .guide-main {
        grid-template-columns: 1fr;
        gap: 25px;
        text-align: center;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .android-guide-content .feature-grid {
        grid-template-columns: 1fr;
    }

    .links-grid {
        grid-template-columns: 1fr;
    }
    
    .instructions-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: 20px 0;
    }
    
    .section-title {
        font-size: 20px;
    }
    
    .link-card,
    .instruction-card,
    .important-notice {
        padding: 20px;
    }
    

}