/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2071FF;
    --bg-dark: #001021;
    --bg-darker: #000C1A;
    --bg-card: #011022;
    --text-primary: #FFFFFF;
    --text-secondary: #A0AEC0;
    --border-color: #1A3A5A;
    --hover-bg: #052C57;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 16, 33, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--primary-color);
    font-size: 24px;
    font-weight: bold;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
    align-items: center;
}

.nav-menu a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--bg-card);
    border-radius: 8px;
    padding: 10px;
    min-width: 180px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
    margin-top: 20px;
    box-shadow: 0 4px 20px rgba(32, 113, 255, 0.2);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 15px;
    border-radius: 6px;
    transition: all 0.3s;
    color: var(--text-primary);
    text-decoration: none;
}

.dropdown-item:hover {
    background: var(--hover-bg);
    color: var(--primary-color);
}

.agent-btn {
    background: var(--hover-bg);
    padding: 8px 20px;
    border-radius: 20px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.language-selector {
    position: relative;
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 20px;
    padding: 8px;
}

.lang-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-card);
    border-radius: 8px;
    padding: 10px;
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
    margin-top: 10px;
}

.language-selector:hover .lang-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-menu a {
    display: block;
    padding: 8px 15px;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s;
}

.lang-menu a:hover,
.lang-menu a.active {
    background: var(--hover-bg);
    color: var(--primary-color);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #1560E0);
    color: white;
    padding: 10px 30px;
    border-radius: 25px;
    text-decoration: none;
    transition: all 0.3s;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(32, 113, 255, 0.4);
}

.btn-large {
    padding: 15px 50px;
    font-size: 18px;
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    padding: 10px 30px;
    border-radius: 25px;
    text-decoration: none;
    transition: all 0.3s;
    display: inline-block;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: all 0.3s;
}

.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 999;
}

.mobile-menu-overlay.active {
    display: block;
}

.mobile-menu-content {
    padding: 100px 20px;
}

.mobile-nav {
    list-style: none;
}

.mobile-nav li {
    margin-bottom: 20px;
}

.mobile-nav a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 24px;
    display: block;
    padding: 15px;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(32, 113, 255, 0.15), transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(32, 113, 255, 0.1), transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.anniversary-badge {
    margin-bottom: 30px;
    animation: float 3s ease-in-out infinite;
}

.anniversary-badge img {
    max-width: 300px;
    height: auto;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.hero-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #FFFFFF, var(--primary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 24px);
    color: var(--text-secondary);
    margin-bottom: 40px;
}

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

/* 全球节点 */
.global-network {
    padding: 100px 0;
}

.section-title {
    font-size: clamp(28px, 4vw, 48px);
    text-align: center;
    margin-bottom: 20px;
}

.section-subtitle {
    font-size: clamp(18px, 2vw, 24px);
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.section-desc {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.network-map {
    position: relative;
    height: 400px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 400"><path d="M0,200 Q250,100 500,200 T1000,200" stroke="%232071FF" stroke-width="1" fill="none" opacity="0.3"/></svg>') center/cover no-repeat;
}

.map-container {
    position: relative;
    height: 100%;
}

.node {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.node::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: ripple 2s infinite;
}

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

@keyframes ripple {
    0% {
        width: 40px;
        height: 40px;
        opacity: 1;
    }
    100% {
        width: 80px;
        height: 80px;
        opacity: 0;
    }
}

.node-1 { top: 30%; left: 20%; animation-delay: 0s; }
.node-2 { top: 50%; left: 40%; animation-delay: 0.4s; }
.node-3 { top: 35%; left: 60%; animation-delay: 0.8s; }
.node-4 { top: 60%; left: 75%; animation-delay: 1.2s; }
.node-5 { top: 45%; left: 85%; animation-delay: 1.6s; }

/* 特性展示 */
.features {
    padding: 80px 0;
    background: var(--bg-darker);
}

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

.feature-card {
    background: var(--bg-card);
    padding: 40px 30px;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(32, 113, 255, 0.3);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 订阅促销 */
.pricing-promo {
    padding: 100px 0;
}

.promo-card {
    background: linear-gradient(135deg, rgba(32, 113, 255, 0.2), rgba(32, 113, 255, 0.1));
    border: 2px solid var(--primary-color);
    border-radius: 24px;
    padding: 60px;
    text-align: center;
}

.promo-card h2 {
    font-size: clamp(28px, 4vw, 42px);
    margin-bottom: 30px;
}

/* QuickQ S */
.quickq-s {
    padding: 80px 0;
    background: var(--bg-darker);
}

.quickq-s-content {
    text-align: center;
}

.quickq-s-content h2 {
    font-size: clamp(28px, 4vw, 42px);
    margin-bottom: 20px;
}

.quickq-s-content p {
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 18px;
}

/* 用户数量 */
.users-count {
    padding: 60px 0;
}

.count-title {
    font-size: clamp(24px, 3vw, 36px);
    text-align: center;
}

/* FAQ */
.faq {
    padding: 80px 0;
}

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

.faq-item {
    border-bottom: 1px solid var(--border-color);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 25px 0;
    cursor: pointer;
    font-weight: 600;
    font-size: 18px;
}

.faq-icon {
    transition: transform 0.3s;
    color: var(--primary-color);
}

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

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

.faq-item.active .faq-answer {
    max-height: 500px;
    padding-bottom: 25px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* 页脚 */
.footer {
    background: var(--bg-darker);
    padding: 80px 0 30px;
    margin-top: 100px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 3fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-logo {
    display: flex;
    align-items: center;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    margin-bottom: 20px;
    font-size: 18px;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: 12px;
}

.footer-column a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-column a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.copyright {
    color: var(--text-secondary);
    font-size: 14px;
}

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

.social-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s;
}

.social-icon:hover {
    background: var(--primary-color);
    transform: translateY(-3px);
}

/* 悬浮按钮 */
.floating-buttons {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.float-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    background: var(--primary-color);
    color: white;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(32, 113, 255, 0.4);
    transition: all 0.3s;
}

.float-btn:hover {
    transform: scale(1.1);
}

.back-top-btn {
    opacity: 0;
    visibility: hidden;
}

.back-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .desktop-menu {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .nav-content {
        height: 60px;
    }

    .hero {
        min-height: 80vh;
        padding-top: 60px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
    }

    .floating-buttons {
        bottom: 20px;
        right: 20px;
    }

    .float-btn {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}

/* ========== 智能客服聊天窗口 ========== */

.chat-window {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 380px;
    height: 550px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    z-index: 9999;
    opacity: 0;
    transform: translateY(20px) scale(0.9);
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(32, 113, 255, 0.3);
}

.chat-window.active {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: all;
}

/* 聊天头部 */
.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    background: linear-gradient(135deg, #2071FF 0%, #1560E0 100%);
    border-radius: 16px 16px 0 0;
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-avatar {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.chat-title {
    font-size: 16px;
    font-weight: 600;
    color: white;
}

.chat-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #4CAF50;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.chat-close {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s;
}

.chat-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* 消息区域 */
.chat-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.chat-messages::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 消息样式 */
.chat-message {
    display: flex;
    gap: 10px;
    animation: messageSlide 0.3s ease;
}

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

.bot-message {
    align-items: flex-start;
}

.user-message {
    flex-direction: row-reverse;
}

.message-avatar {
    width: 36px;
    height: 36px;
    background: rgba(32, 113, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.message-content {
    max-width: 75%;
}

.user-message .message-content {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.message-text {
    background: rgba(255, 255, 255, 0.1);
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.5;
    color: white;
}

.user-message .message-text {
    background: linear-gradient(135deg, #2071FF 0%, #1560E0 100%);
}

.message-time {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 4px;
    padding: 0 4px;
}

/* 下载链接按钮 */
.download-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 10px 0;
}

.download-link-btn {
    padding: 12px 16px;
    background: rgba(32, 113, 255, 0.2);
    border: 1px solid rgba(32, 113, 255, 0.4);
    border-radius: 8px;
    color: white;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: left;
}

.download-link-btn:hover {
    background: rgba(32, 113, 255, 0.3);
    border-color: rgba(32, 113, 255, 0.6);
    transform: translateX(4px);
}

/* 输入区域 */
.chat-input-area {
    display: flex;
    gap: 10px;
    padding: 16px 20px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 0 0 16px 16px;
}

.chat-input {
    flex: 1;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    font-size: 14px;
    outline: none;
    transition: all 0.3s;
}

.chat-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.chat-input:focus {
    background: rgba(255, 255, 255, 0.15);
    border-color: #2071FF;
}

.chat-send-btn {
    padding: 12px 24px;
    background: linear-gradient(135deg, #2071FF 0%, #1560E0 100%);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.chat-send-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(32, 113, 255, 0.4);
}

.chat-send-btn:active {
    transform: translateY(0);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .chat-window {
        right: 10px;
        bottom: 80px;
        width: calc(100% - 20px);
        max-width: 380px;
        height: 500px;
    }
    
    .message-content {
        max-width: 80%;
    }
}