* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

section {
    padding: 80px 0;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    color: #1a1a1a;
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-desc {
    text-align: center;
    color: #666;
    max-width: 800px;
    margin: 0 auto 48px;
    font-size: 16px;
    line-height: 1.6;
}

.hero {
    background: linear-gradient(135deg, #00b894 0%, #00cec9 100%);
    padding: 100px 0;
    color: #fff;
    position: relative;
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 60px;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    margin-bottom: 20px;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-features {
    list-style: none;
    margin-bottom: 32px;
}

.hero-features li {
    padding-left: 24px;
    position: relative;
    margin-bottom: 12px;
    font-size: 15px;
}

.hero-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 12px;
    height: 6px;
    border-left: 2px solid #ffd700;
    border-bottom: 2px solid #ffd700;
    transform: rotate(-45deg);
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.btn {
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    width: 214px;
    height: 56px;
    padding: 0 16px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    gap: 12px;
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-icon img {
    width: 24px;
    height: 24px;
}

.btn-text {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    line-height: 1.2;
}

.btn-title {
    font-size: 16px;
    font-weight: 600;
}

.btn small {
    font-size: 11px;
    opacity: 0.8;
    font-weight: 400;
}

.btn-primary {
    background: #fff;
    color: #00b894;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.3);
    transform: translateY(-2px);
}

.hero-note {
    font-size: 12px;
    opacity: 0.8;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-visual {
    position: relative;
    width: 420px;
    height: 420px;
    flex-shrink: 0;
}

.hero-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.hero-ring-item-wrapper {
    position: absolute;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    animation: pulse 2s ease-in-out infinite;
}

.hero-ring-item {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-color);
}

.hero-ring-item img {
    width: 24px;
    height: 24px;
    object-fit: contain;
    display: block;
    margin: auto;
}

.hero-ring-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.9);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
    white-space: nowrap;
}

/* 圆环布局 - 8个位置，使用CSS变量实现等距圆环 */
.hero-ring-item-wrapper:nth-child(1) { 
    top: 0; 
    left: 50%; 
    transform: translateX(-50%); 
    animation-delay: 0s; 
}
.hero-ring-item-wrapper:nth-child(2) { 
    top: 20.6%; 
    right: 14.6%; 
    transform: translate(50%, -50%); 
    animation-delay: 0.25s; 
}
.hero-ring-item-wrapper:nth-child(3) { 
    top: 50%; 
    right: 0; 
    transform: translate(50%, -50%); 
    animation-delay: 0.5s; 
}
.hero-ring-item-wrapper:nth-child(4) { 
    bottom: 20.6%;
    right: 14.6%;
    transform: translate(50%, 50%); 
    animation-delay: 0.75s; 
}
.hero-ring-item-wrapper:nth-child(5) { 
    bottom: 0; 
    left: 50%; 
    transform: translateX(-50%); 
    animation-delay: 1s; 
}
.hero-ring-item-wrapper:nth-child(6) { 
    bottom: 20.6%; 
    left: 14.6%; 
    transform: translate(-50%, 50%); 
    animation-delay: 1.25s; 
}
.hero-ring-item-wrapper:nth-child(7) { 
    top: 50%; 
    left: 0; 
    transform: translate(-50%, -50%); 
    animation-delay: 1.5s; 
}
.hero-ring-item-wrapper:nth-child(8) { 
    top: 20.6%; 
    left: 20.6%; 
    transform: translate(-50%, -50%); 
    animation-delay: 1.75s; 
}

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

.hero-center {
    position: absolute;
    top: 45%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 320px;
    height: 329px;
    z-index: 10;
}

.hero-center img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 10px 30px rgba(0, 0, 0, 0.2));
    opacity: .8;
}

.scenarios {
    background: #fff;
    padding: 80px 0;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.scenario-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: #f8f9fa;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.scenario-item:hover {
    background: #e8f8f5;
    transform: translateY(-2px);
}

.scenario-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #d4f5e9;
    border-radius: 50%;
}

.scenario-icon img {
    width: 18px;
    height: 18px;
}

.scenario-item span:last-child {
    font-size: 14px;
    color: #333;
    font-weight: 500;
}

.modes {
    background: #f8f9fa;
    padding: 80px 0;
}

.modes-wrapper {
    display: flex;
    gap: 60px;
    align-items: center;
}

.modes-tabs {
    flex: 1;
}

.mode-tab {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: #fff;
    border-radius: 12px;
    margin-bottom: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.mode-tab:hover {
    border-color: #00b894;
}

.mode-tab.active {
    border-color: #00b894;
    background: #f0fdf9;
}

.mode-icon {
    width: 24px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #e8f8f5;
    border-radius: 8px;
    flex-shrink: 0;
    transition: all 0.3s ease;
}

.mode-icon img {
    width: 20px;
    height: 20px;
    transition: all 0.3s ease;
}

.mode-tab.active .mode-icon {
    background: #10b981;
}

.mode-tab.active .mode-icon img {
    filter: brightness(0) invert(1);
}

.mode-text h4 {
    font-size: 16px;
    font-weight: 600;
    color: #00b894;
    margin-bottom: 8px;
}

.mode-text p {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

.modes-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    background: #fff;
    border-radius: 16px;
    padding: 40px;
    min-height: 400px;
}

.mode-img {
    max-width: 100%;
    height: auto;
    display: none;
}

.mode-img.active {
    display: block;
}

.filetypes {
    background: #fff;
    padding: 80px 0;
}

.filetypes-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
    justify-content: center;
}

.filetype-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.filetype-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.filetype-item:hover .filetype-icon {
    transform: scale(1.1);
}

.filetype-icon img {
    width: 28px;
    height: 28px;
}

.filetype-icon.pink { background: #ff6b9d; }
.filetype-icon.blue { background: #4a90d9; }
.filetype-icon.orange { background: #ff6b35; }
.filetype-icon.green { background: #00b894; }
.filetype-icon.purple { background: #9b59b6; }
.filetype-icon.blue-light { background: #3498db; }
.filetype-icon.orange-light { background: #f39c12; }
.filetype-icon.purple-light { background: #8e44ad; }
.filetype-icon.teal { background: #1abc9c; }
.filetype-icon.blue-dark { background: #2980b9; }
.filetype-icon.gray { background: #7f8c8d; }
.filetype-icon.gray-dark { background: #5d6d7e; }

.filetype-item span:last-child {
    font-size: 12px;
    color: #666;
}

.whatsapp {
    background: #e8f8f5;
    padding: 80px 0;
}

.whatsapp-wrapper {
    display: flex;
    gap: 60px;
    align-items: center;
    background: #fff;
    border-radius: 16px;
    padding: 40px;
}

.whatsapp-image {
    flex: 1;
    display: flex;
    justify-content: center;
}

.whatsapp-image img {
    max-width: 100%;
    height: auto;
}

.whatsapp-content {
    flex: 1;
}

.whatsapp-content .section-title {
    text-align: left;
    margin-bottom: 16px;
}

.whatsapp-content p {
    color: #666;
    margin-bottom: 24px;
}

.whatsapp-features {
    list-style: none;
}

.whatsapp-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 15px;
}

.check-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #00b894;
    border-radius: 50%;
}

.check-icon img {
    width: 14px;
    height: 14px;
}

.powerful {
    background: #fff;
    padding: 80px 0;
}

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

.powerful-card {
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    border: 1px solid #e8e8e8;
    transition: all 0.3s ease;
}

.powerful-card:hover {
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
    transform: translateY(-4px);
}

.powerful-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.powerful-icon img {
    width: 24px;
    height: 24px;
}

.powerful-icon.blue { background: #4a90d9; }
.powerful-icon.orange { background: #ff6b35; }
.powerful-icon.green { background: #00b894; }
.powerful-icon.purple { background: #9b59b6; }
.powerful-icon.cyan { background: #00cec9; }
.powerful-icon.red { background: #e74c3c; }
.powerful-icon.teal { background: #1abc9c; }
.powerful-icon.violet { background: #8e44ad; }

.powerful-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.powerful-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

.tech-spec {
    background: #f8f9fa;
    padding: 80px 0;
}

.brand-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.brand-tab {
    padding: 10px 24px;
    background: #fff;
    border-radius: 24px;
    font-size: 14px;
    color: #666;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid #e8e8e8;
}

.brand-tab:hover {
    border-color: #00b894;
    color: #00b894;
}

.brand-tab.active {
    background: #00b894;
    color: #fff;
    border-color: #00b894;
}

.spec-table {
    background: #ecfdf5a1;
    border-radius: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.spec-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 16px;
    border-radius: 8px;
    transition: all 0.3s ease;
    border-bottom: 1px solid #c7f7f7;
}

.spec-row:hover {
    background: rgba(255, 255, 255, 0.7);
}

.spec-label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 600;
    color: #1a1a1a;
}

.spec-icon-wrap {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #dcfce7;
    border-radius: 10px;
}

.spec-icon-wrap img {
    width: 20px;
    height: 20px;
}

.spec-value {
    color: #666;
    font-size: 14px;
}

.testimonials-section {
    background: #f8f9fa;
    padding: 80px 0;
}

.testimonials-section .section-title {
    text-align: center;
    margin-bottom: 48px;
}

.testimonials-slider {
    max-width: 800px;
    margin: 0 auto 48px;
    position: relative;
}

.testimonial-item {
    display: flex;
    gap: 32px;
    background: #EDFDF6;
    padding: 40px 80px;
    border-radius: 16px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.testimonial-avatar {
    flex-shrink: 0;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
}

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

.testimonial-content {
    flex: 1;
}

.testimonial-text {
    font-size: 15px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 16px;
    font-style: italic;
}

.testimonial-rating {
    margin-bottom: 12px;
}

.testimonial-rating .star {
    color: #fbbf24;
    font-size: 18px;
}

.testimonial-name {
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 4px;
}

.testimonial-role {
    font-size: 13px;
    color: #9ca3af;
}

.testimonials-slider .swiper-button-prev,
.testimonials-slider .swiper-button-next {
    width: 44px;
    height: 44px;
    background: #fff;
    border-radius: 50%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    /* color: #6366f1; */
    transform: translateY(-50%) scale(1.05);
}

.testimonials-slider .swiper-button-prev::after,
.testimonials-slider .swiper-button-next::after {
    font-size: 16px;
    font-weight: bold;
}

.testimonials-slider .swiper-pagination-bullet-active {
    background: #6366f1;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
    cursor: pointer;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    border: none;
    transition: all 0.3s ease;
}

.testimonials-slider .swiper-button-prev:hover,
.testimonials-slider .swiper-button-next:hover {
    box-shadow: 0 6px 20px rgba(0,0,0,0.2);
    transform: translateY(-50%) scale(1.05);
}

.testimonials-slider .swiper-button-prev {
    left: 20px;
}

.testimonials-slider .swiper-button-next {
    right: 20px;
}

.testimonials-slider .swiper-button-prev::after,
.testimonials-slider .swiper-button-next::after {
    /* font-size: 18px; */
    /* font-weight: 700; */
    color: #333;
}

.testimonials-slider .swiper-button-prev::after {
    content: 'prev';
}

.testimonials-slider .swiper-button-next::after {
    content: 'next';
}

.swiper-pagination {
    position: relative;
    margin-top: 20px;
}

.swiper-pagination-bullet {
    width: 8px;
    height: 8px;
    background: #ddd;
    opacity: 1;
}

.swiper-pagination-bullet-active {
    background: #00b894;
    width: 24px;
    border-radius: 4px;
}

.media-logos {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.media-logo {
    font-size: 18px;
    font-weight: 700;
}

.media-logo.cnet { color: #e74c3c; }
.media-logo.techradar { color: #ff6b6b; }
.media-logo.pcworld { color: #3498db; }
.media-logo.tomsguide { color: #e67e22; }
.media-logo.softpedia { color: #2ecc71; }
.media-logo.androidpolice { color: #1abc9c; }

.tips {
    background: #fff;
    padding: 80px 0;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.tip-card {
    background: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.tip-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.tip-image {
    position: relative;
    height: 200px;
    overflow: hidden;
}

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

.tip-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: #00b894;
    color: #fff;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.tip-date {
    position: absolute;
    top: 12px;
    right: 12px;
    background: #fff;
    color: #666;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
}

.tip-card h4 {
    padding: 20px;
    font-size: 16px;
    font-weight: 600;
    color: #1a1a1a;
    line-height: 1.4;
}

.tip-link {
    display: inline-block;
    padding: 0 20px 20px;
    color: #00b894;
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

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

.faq {
    background: #fff;
    padding: 80px 0;
}

.faq-badge {
    display: block;
    text-align: center;
    color: #00b894;
    font-size: 14px;
    margin-bottom: 16px;
}

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

.faq-item {
    border: 1px solid #e8e8e8;
    border-radius: 8px;
    margin-bottom: 12px;
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    cursor: pointer;
    background: #fff;
    transition: all 0.3s ease;
}

.faq-question:hover {
    background: #f8f9fa;
}

.faq-question span:first-child {
    font-size: 15px;
    color: #1a1a1a;
    font-weight: 500;
    padding-right: 20px;
}

.faq-arrow {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.faq-arrow img {
    width: 16px;
    height: 16px;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    background: #f8f9fa;
}

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

.faq-answer p {
    padding: 0 20px 20px;
    font-size: 14px;
    color: #666;
    line-height: 1.7;
}

.cta {
    background: linear-gradient(135deg, #00b894 0%, #00cec9 100%);
    padding: 80px 0;
    text-align: center;
    color: #fff;
}

.cta h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
}

.cta p {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 32px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
}

@media (max-width: 1024px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-features li {
        text-align: left;
    }
    
    .modes-wrapper {
        flex-direction: column;
    }
    
    .modes-image {
        min-height: 300px;
    }
    
    .whatsapp-wrapper {
        flex-direction: column;
    }
    
    .whatsapp-content .section-title {
        text-align: center;
    }
    
    .powerful-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .filetypes-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    
    .tips-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .section-title {
        font-size: 28px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .powerful-grid {
        grid-template-columns: 1fr;
    }
    
    .filetypes-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .testimonial-item {
        flex-direction: column;
        text-align: center;
    }
    
    .tips-grid {
        grid-template-columns: 1fr;
    }
    
    .testimonial-avatar {
        margin: 0 auto;
    }
    
    .brand-tabs {
        gap: 8px;
    }
    
    .brand-tab {
        padding: 8px 16px;
        font-size: 12px;
    }
    
    .spec-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .media-logos {
        gap: 20px;
    }
    
    .media-logo {
        font-size: 14px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .filetypes-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .mode-tab {
        flex-direction: column;
        text-align: center;
    }
    
    .mode-icon {
        margin: 0 auto;
    }
}