body {
    background-color: #FFFFFF;
    color: #121826;
    line-height: 1.6;
    scroll-behavior: smooth;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.container {
    width: 100%;
    max-width: 1580px;
    margin: 0 auto;
    padding: 0 20px;
}

section {
    padding: 80px 0;
    position: relative;
}

/* 背景色类 */
.bg-white {
    background-color: #FFFFFF;
}

.bg-light {
    background-color: #F5F7FA;
}

.bg-gradient {
    background: linear-gradient(135deg, #075E54, #25D366);
}

/* 标题样式 */
.section-title {
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-title h2 {
    font-size: 36px;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
    background: linear-gradient(90deg, #25D366, #075E54);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: -0.5px;
}

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #25D366, #075E54);
    border-radius: 3px;
}

.section-title p {
    color: #3E4759;
    max-width: 700px;
    margin: 0 auto;
    font-size: 18px;
    line-height: 1.7;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: none;
    font-size: 16px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: 0.6s;
    z-index: -1;
}

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

.btn-primary {
    background-color: #25D366;
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.btn-primary:hover {
    background-color: #075E54;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.4);
}

.btn-secondary {
    background-color: #FFFFFF;
    color: #25D366;
    border: 1px solid #25D366;
}

.btn-secondary:hover {
    background-color: #E8F5E9;
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(37, 211, 102, 0.15);
}

/* Hero/Banner区样式 */
.hero {
    padding: 140px 0;
    color: #FFFFFF;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('../assets/nbanner.jpg'), 
                      radial-gradient(circle at 10% 20%, rgba(255,255,255,0.15) 0%, transparent 20%),
                      radial-gradient(circle at 90% 70%, rgba(255,255,255,0.15) 0%, transparent 30%);
    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
    opacity: 0.3;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(7, 94, 84, 0.9), rgba(37, 211, 102, 0.8));
    z-index: -1;
}

.whatsapp-logos {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    opacity: 0.1;
}

.whatsapp-logos i {
    position: absolute;
    font-size: 60px;
    color: white;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(10deg); }
}

.whatsapp-logos i:nth-child(1) { top: 10%; left: 10%; animation-delay: 0s; }
.whatsapp-logos i:nth-child(2) { top: 30%; left: 80%; animation-delay: 2s; }
.whatsapp-logos i:nth-child(3) { top: 70%; left: 20%; animation-delay: 4s; }
.whatsapp-logos i:nth-child(4) { top: 90%; left: 70%; animation-delay: 6s; }
.whatsapp-logos i:nth-child(5) { top: 50%; left: 40%; animation-delay: 8s; }

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 30px auto 0;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 25px;
    line-height: 1.3;
    color: #FFF;
}

.hero p {
    font-size: 22px;
    max-width: 700px;
    margin: 0 auto 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.hero .btn-primary {
    background-color: #FFFFFF;
    color: #25D366;
    font-size: 18px;
    padding: 16px 32px;
}

.hero .btn-secondary {
    background-color: transparent;
    color: #FFFFFF;
    border-color: #FFFFFF;
    font-size: 18px;
    padding: 16px 32px;
}

/* 协议号简介 */
.intro-section {
    background-color: #FFFFFF;
}

.intro-description {
    max-width: 800px;
    margin: 0 auto 60px;
    text-align: center;
    font-size: 18px;
    color: #3E4759;
    line-height: 1.8;
}

.number-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.type-card {
    border-radius: 12px;
    padding: 40px 30px;
    color: #FFFFFF;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.type-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: 0.6s;
}

.type-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.15);
}

.type-card:hover::before {
    left: 100%;
}

.type-card.blue {
    background-color: #1E88E5;
}

.type-card.green {
    background-color: #25D366;
}

.type-card.red {
    background-color: #EF4444;
}

.type-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background-color: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    font-size: 28px;
}

.type-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #FFF;
}

.type-card p {
    opacity: 0.9;
    line-height: 1.7;
}

/* 核心优势 */
.advantages-section {
    background-color: #F5F7FA;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-card {
    background-color: #FFFFFF;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.15);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    border-radius: 12px;
    background-color: #E8F5E9;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: #25D366;
    font-size: 28px;
}

.advantage-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #121826;
}

.advantage-card p {
    color: #3E4759;
    line-height: 1.7;
    flex-grow: 1;
}

/* 全球可用地区 */
.regions-section {
    background-color: #FFFFFF;
}

.continents {
    margin-bottom: 60px;
}

.continent-title {
    background-color: #E8F5E9;
    color: #075E54;
    padding: 18px 30px;
    border-radius: 12px;
    margin-bottom: 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 20px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.continent-title:hover {
    background-color: #d4edd9;
}

.continent-title i {
    transition: transform 0.3s ease;
}

.continent-title.active i {
    transform: rotate(180deg);
}

.countries-container {
    display: none;
    padding: 20px 30px;
    background-color: #F5F7FA;
    border-radius: 12px;
    margin-bottom: 30px;
}

.countries-container.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.countries-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.country-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background-color: #FFFFFF;
    border-radius: 6px;
    font-size: 16px;
    color: #3E4759;
}

.country-item i {
    color: #25D366;
    font-size: 14px;
}

.map-container {
    max-width: 1000px;
    margin: 0 auto;
    height: 500px;
    background-color: #F5F7FA;
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
}

.world-map {
    width: 100%;
    height: 100%;
    background-image: url('../assets/map.jpg');
    background-size: cover;
    background-position: center;
    position: relative;
}

.map-marker {
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: #25D366;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(37, 211, 102, 0); }
    100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

.map-marker:nth-child(1) { top: 30%; left: 25%; }
.map-marker:nth-child(2) { top: 25%; left: 50%; }
.map-marker:nth-child(3) { top: 45%; left: 80%; }
.map-marker:nth-child(4) { top: 60%; left: 48%; }
.map-marker:nth-child(5) { top: 20%; left: 70%; }
.map-marker:nth-child(6) { top: 70%; left: 20%; }
.map-marker:nth-child(7) { top: 35%; left: 85%; }

/* 应用场景 */
.use-cases-section {
    background-color: #F5F7FA;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.use-case-card {
    background-color: #FFFFFF;
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.use-case-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.15);
}

.use-case-icon {
    width: 70px;
    height: 70px;
    border-radius: 12px;
    background-color: #E8F5E9;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: #25D366;
    font-size: 28px;
}

.use-case-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
    color: #121826;
}

.use-case-card p {
    color: #3E4759;
    line-height: 1.7;
}

/* 系统要求 */
.system-section {
    background-color: #FFFFFF;
}

.system-container {
    background-color: #F5F7FA;
    border-radius: 12px;
    padding: 40px;
    max-width: 800px;
    margin: 0 auto;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
}

.system-requirements {
    margin-bottom: 30px;
}

.system-requirements h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: #075E54;
}

.requirements-list {
    list-style: none;
}

.requirements-list li {
    padding: 12px 0;
    display: flex;
    align-items: flex-start;
    color: #3E4759;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

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

.requirements-list li i {
    color: #25D366;
    margin-right: 15px;
    margin-top: 4px;
    flex-shrink: 0;
}

.system-note {
    background-color: rgba(37, 211, 102, 0.1);
    border-left: 4px solid #25D366;
    padding: 20px;
    border-radius: 0 6px 6px 0;
}

.system-note p {
    color: #075E54;
    line-height: 1.7;
}

/* FAQ部分 */
.faq-section {
    background-color: #F5F7FA;
}

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

.faq-item {
    margin-bottom: 15px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
}

.faq-question {
    background-color: #FFFFFF;
    padding: 18px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-question:hover {
    background-color: #E8F5E9;
}

.faq-question i {
    color: #25D366;
    transition: transform 0.3s ease;
}

.faq-question.active i {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    background-color: #FFFFFF;
    padding: 20px 30px;
    color: #3E4759;
    border-top: 1px solid #E2E8F0;
}

.faq-answer.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

/* CTA转化模块 */
.cta-section {
    background-color: #FFFFFF;
    padding: 100px 0;
}

.cta-container {
    background: linear-gradient(135deg, #075E54, #25D366);
    border-radius: 12px;
    padding: 60px 40px;
    text-align: center;
    color: #FFFFFF;
    box-shadow: 0 4px 20px rgba(0, 21, 51, 0.08);
}

.cta-container h3 {
    font-size: 32px;
    margin-bottom: 25px;
    line-height: 1.3;
    color: #FFF;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin: 30px 0 40px;
}

.cta-buttons .btn {
    font-size: 18px;
    padding: 16px 32px;
}

.cta-container .btn-primary {
    background-color: #FFFFFF;
    color: #25D366;
}

.cta-container .btn-secondary {
    background-color: transparent;
    color: #FFFFFF;
    border-color: #FFFFFF;
}

.contact-options {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 30px;
    flex-wrap: wrap;
}

.contact-button {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background-color: rgba(255,255,255,0.1);
    border-radius: 50px;
    color: #FFFFFF;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-button:hover {
    background-color: rgba(255,255,255,0.2);
    transform: translateY(-3px);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 42px;
    }
    
    .map-container {
        height: 400px;
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }
    
    .hero {
        padding: 100px 0;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero p {
        font-size: 18px;
    }
    
    .section-title h2 {
        font-size: 30px;
    }
    
    .section-title p {
        font-size: 16px;
    }
    
    .cta-container h3 {
        font-size: 26px;
    }
    
    .map-container {
        height: 300px;
    }
    
    .system-container {
        padding: 30px 20px;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-buttons .btn,
    .cta-buttons .btn {
        width: 100%;
    }
    
    .contact-options {
        flex-direction: column;
        gap: 15px;
    }
    
    .contact-button {
        justify-content: center;
    }
    
    .countries-grid {
        grid-template-columns: 1fr;
    }
    
    .map-container {
        height: 250px;
    }
}