/* 基础样式 */
body {
    font-family: 'Inter', sans-serif;
    background-color: #F8FAFC;
    color: #1E293B;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
}

/* 导航栏样式 */
.navbar {
    position: fixed;
    width: 100%;
    z-index: 50;
    transition: all 0.3s ease;
    background-color: transparent;
}

.navbar.scrolled {
    background-color: #165DFF;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    background-color: #165DFF;
    color: white;
    padding: 0.5rem;
    border-radius: 0.5rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: bold;
    color: white;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.12);
}

.logo-highlight {
    color: #FF7D00;
}

.desktop-nav {
    display: none;
}

@media (min-width: 768px) {
    .desktop-nav {
        display: flex;
        gap: 2rem;
    }
}

.nav-link {
    color: white;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #FF7D00;
}

.menu-toggle {
    color: white;
    font-size: 1.5rem;
    border: none;
    background: none;
    cursor: pointer;
}

@media (min-width: 768px) {
    .menu-toggle {
        display: none;
    }
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 70%;
    max-width: 300px;
    height: 100%;
    background-color: white;
    z-index: 100;
    padding: 2rem;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.mobile-menu.active {
    transform: translateX(0);
    display: block;
}

.close-menu {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
}

.mobile-nav {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 3rem;
}

.mobile-nav-link {
    color: #1E293B;
    font-weight: 500;
    text-decoration: none;
}

.overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

/* 英雄区域 */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(to right, rgba(22, 93, 255, 0.8), rgba(0, 64, 193, 0.9)), url('./banner.jpg');
    background-size: cover;
    background-position: center;
    z-index: -1;
}

.hero-content {
    text-align: center;
    padding: 0 2rem;
    max-width: 900px;
    z-index: 10;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    color: white;
    margin-bottom: 1.5rem;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.12);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 2vw, 1.75rem);
    color: white;
    margin-bottom: 3rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    line-height: 1.6;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: linear-gradient(135deg, #FF7D00 0%, #E65C00 100%);
    color: white;
    font-weight: 600;
    font-size: 1.25rem;
    border-radius: 0.5rem;
    text-decoration: none;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    margin: 0.75rem;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.secondary-button {
    background: linear-gradient(135deg, #165DFF 0%, #0040C1 100%);
}

.button-icon {
    margin-right: 0.5rem;
}

/* 波浪效果 */
.wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    overflow: hidden;
    line-height: 0;
    transform: rotate(180deg);
}

.wave svg {
    position: relative;
    display: block;
    width: calc(100% + 1.3px);
    height: 100px;
}

.wave .shape-fill {
    fill: #F8FAFC;
}

/* 平台介绍 */
.section {
    padding: 8rem 0;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    color: #1E293B;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 4rem;
    height: 0.25rem;
    background-color: #165DFF;
    border-radius: 0.25rem;
}

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

@media (min-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr 1fr;
    }
}

.about-text {
    font-size: 1.125rem;
    line-height: 1.8;
    color: #334155;
}

.about-image {
    position: relative;
    overflow: hidden;
    border-radius: 0.75rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.about-image img {
    width: 100%;
    height: auto;
    transition: transform 0.5s ease;
}

.about-image:hover img {
    transform: scale(1.05);
}

/* 服务优势 */
.services {
    background-color: #F1F5F9;
}

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 640px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.service-card {
    background-color: white;
    border-radius: 0.75rem;
    padding: 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0.25rem;
    background-color: #165DFF;
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-icon {
    color: #165DFF;
    font-size: 2rem;
    margin-bottom: 1.5rem;
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1E293B;
}

.service-text {
    font-size: 1rem;
    line-height: 1.6;
    color: #64748B;
}

/* 国籍选择 */
.countries-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

@media (min-width: 640px) {
    .countries-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 1024px) {
    .countries-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

.country-card {
    background-color: white;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: all 0.3s ease;
    position: relative;
    height: 120px;
}

.country-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.country-flag {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.country-card:hover .country-flag {
    opacity: 0.7;
}

.country-name {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 0.5rem;
    background-color: rgba(22, 93, 255, 0.8);
    color: white;
    font-weight: 500;
    text-align: center;
    font-size: 0.875rem;
}

/* 立即加入 */
.join {
    background-color: #165DFF;
    color: white;
    position: relative;
    overflow: hidden;
}

.join::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('https://picsum.photos/id/1048/1920/1080');
    background-size: cover;
    background-position: center;
    opacity: 0.1;
    z-index: 0;
}

.join-content {
    position: relative;
    z-index: 10;
    text-align: center;
}

.join-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.join-text {
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: 3rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

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

.social-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    color: white;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.social-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.telegram-button {
    background-color: #229ED9;
}

.whatsapp-button {
    background-color: #25D366;
}

.social-icon {
    margin-right: 0.75rem;
    font-size: 1.25rem;
}

/* 页脚 */
footer {
    background-color: #0F172A;
    color: #94A3B8;
    padding: 4rem 0;
}

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

@media (min-width: 768px) {
    .footer-content {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.footer-logo-icon {
    background-color: #165DFF;
    color: white;
    padding: 0.5rem;
    border-radius: 0.5rem;
}

.footer-logo-text {
    font-size: 1.25rem;
    font-weight: bold;
    color: white;
}

.footer-logo-highlight {
    color: #FF7D00;
}

.footer-text {
    line-height: 1.6;
}

.footer-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
    margin-bottom: 1.5rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-link {
    color: #94A3B8;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-link:hover {
    color: white;
}

.footer-bottom {
    margin-top: 4rem;
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #1E293B;
}

/* 滚动动画 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}