/* 全局样式 */
:root {
    --primary-color: #3069D5;
    --secondary-color: #6C5CE7;
    --dark-bg: #0A0E27;
    --light-bg: #F8FAFB;
    --text-dark: #1A1A2E;
    --text-light: #6B7280;
    --white: #FFFFFF;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #2948FF 0%, #00BEFF 100%);
    --gradient-3: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-hero: linear-gradient(180deg, #E8F5F3 0%, #F0F9FF 50%, #FFFFFF 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

* {
    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: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 按钮样式 */
.btn-primary {
    background: var(--gradient-2);
    color: var(--white);
    border: none;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 16px rgba(52, 152, 219, 0.25);
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(52, 152, 219, 0.35);
}

.btn-primary:hover::before {
    opacity: 1;
}

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

.btn-secondary {
    background: var(--white);
    color: var(--text-dark);
    border: 2px solid #E5E7EB;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.btn-secondary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.05) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-secondary:hover::before {
    opacity: 1;
}

.btn-secondary:active {
    background: #F9FAFB;
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-text {
    background: transparent;
    border: none;
    color: var(--text-dark);
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-text:hover {
    color: var(--primary-color);
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

/* 导航栏 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(180deg, rgba(232, 245, 243, 0.98) 0%, rgba(240, 249, 255, 0.98) 100%);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: linear-gradient(180deg, rgba(232, 245, 243, 0.98) 0%, rgba(240, 249, 255, 0.98) 100%);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.navbar {
    padding: 16px 0;
    transition: padding 0.3s ease;
}

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

.logo {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.02);
}

.logo-img {
    height: 56px;
    width: auto;
    display: block;
}

.logo-text {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-item {
    color: var(--text-dark);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 4px;
    position: relative;
    padding: 6px 0;
}

.nav-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-2);
    transition: width 0.3s ease;
}

.nav-item:hover {
    color: var(--primary-color);
}

.nav-item:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.lang-selector {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.lang-selector:hover {
    background: #F3F4F6;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-dark);
    padding: 8px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle:hover {
    color: var(--primary-color);
    transform: scale(1.1);
}

/* 移动端菜单遮罩 */
.mobile-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* 移动端菜单 */
.mobile-nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 85%;
    max-width: 320px;
    height: 100vh;
    background: linear-gradient(180deg, #ffffff 0%, #f8f9fa 100%);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.15);
    z-index: 999;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.mobile-nav-menu.active {
    right: 0;
}

/* 移动端菜单头部 */
.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    background: white;
}

.mobile-menu-logo {
    height: 40px;
}

.mobile-menu-logo img {
    height: 100%;
    width: auto;
}

.mobile-menu-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-dark);
    cursor: pointer;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    border-radius: 8px;
}

.mobile-menu-close:hover {
    background: rgba(0, 0, 0, 0.05);
    color: var(--primary-color);
    transform: rotate(90deg);
}

/* 移动端菜单内容 */
.mobile-menu-content {
    flex: 1;
    padding: 10px 0;
}

.mobile-nav-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    color: var(--text-dark);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.mobile-nav-item i {
    font-size: 18px;
    width: 24px;
    text-align: center;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

.mobile-nav-item:hover {
    background: rgba(52, 152, 219, 0.08);
    border-left-color: var(--primary-color);
    padding-left: 28px;
}

.mobile-nav-item:hover i {
    transform: scale(1.2);
}

/* 移动端菜单操作按钮 */
.mobile-nav-actions {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    background: white;
}

.btn-block {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    font-size: 15px;
}

.btn-block i {
    font-size: 16px;
}

/* Hero 区域 */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(180deg, #E8F5F3 0%, #F0F9FF 50%, #FFFFFF 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 1000px;
    height: 1000px;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.08) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 20s infinite ease-in-out;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -15%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(52, 152, 219, 0.06) 0%, transparent 70%);
    border-radius: 50%;
    animation: float 25s infinite ease-in-out reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-50px, 50px) scale(1.1); }
}

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

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 28px;
    color: var(--text-dark);
    animation: fadeInUp 0.8s ease-out;
}

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

.gradient-text {
    background: var(--gradient-2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto 48px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 80px;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-buttons .btn-primary,
.hero-buttons .btn-secondary {
    padding: 16px 40px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 12px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.hero-buttons .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(52, 152, 219, 0.3);
}

.hero-buttons .btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

/* 渠道图标 */
.channels {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 32px;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.channel-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: all 0.3s ease;
    transition: transform 0.3s ease;
}

.channel-item:hover {
    transform: translateY(-5px);
}

/* 产品展示图 */
.hero-showcase {
    margin: 60px 0;
}

.showcase-image {
    width: 100%;
    max-width: 1000px;
    height: auto;
    margin: 0 auto;
    display: block;
}

.channel-icon {
    width: 64px;
    height: 64px;
    background: var(--white);
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(52, 152, 219, 0.1);
}

.channel-item:hover .channel-icon {
    box-shadow: 0 8px 24px rgba(52, 152, 219, 0.2);
    background: var(--gradient-2);
    color: var(--white);
    transform: scale(1.1) rotate(5deg);
    border-color: transparent;
}

.channel-item span {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 500;
    transition: color 0.3s ease;
}

.channel-item:hover span {
    color: var(--primary-color);
}

/* 信任标识 */
.trust-section {
    margin-top: 80px;
    animation: fadeInUp 0.8s ease-out 0.8s both;
}

.feature-badges {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.badge-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 24px;
    background: var(--white);
    border-radius: 50px;
    border: 1px solid rgba(52, 152, 219, 0.15);
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.badge-item:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(52, 152, 219, 0.15);
    transform: translateY(-2px);
}

.badge-item i {
    font-size: 16px;
    color: var(--primary-color);
}

.badge-item span {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
}

.trust-text {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 32px;
}

.logo-slider {
    overflow: hidden;
    position: relative;
}

.logo-track {
    display: flex;
    gap: 48px;
    animation: scroll 30s linear infinite;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.partner-logo {
    font-size: 18px;
    font-weight: 700;
    color: #9CA3AF;
    white-space: nowrap;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}

.partner-logo:hover {
    opacity: 1;
}

/* 业务方案 */
.solutions {
    padding: 100px 0;
    background: linear-gradient(180deg, #E8F5F3 0%, #F0F9FF 100%);
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 16px;
    color: var(--text-dark);
    line-height: 1.2;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    text-align: center;
    max-width: 700px;
    margin: 0 auto 64px;
    line-height: 1.6;
}

.solution-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background: var(--white);
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab-btn.active {
    background: var(--gradient-2);
    color: var(--white);
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

.solution-content {
    display: none;
}

.solution-content.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.solution-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.solution-text h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.solution-desc {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 32px;
}

.feature-list {
    margin-bottom: 32px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 15px;
    color: var(--text-dark);
}

.feature-item i {
    color: var(--primary-color);
    font-size: 18px;
}

.industry-tags {
    margin-top: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.tag-label {
    font-size: 14px;
    color: var(--text-light);
}

.industry-icons {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    color: var(--primary-color);
}

.industry-icons span {
    font-size: 14px;
    color: var(--text-light);
}

/* 模拟聊天界面 */
.mockup-container {
    perspective: 1000px;
}

.chat-mockup {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transform: rotateY(-5deg);
    transition: transform 0.3s ease;
}

.chat-mockup:hover {
    transform: rotateY(0deg);
}

.mockup-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 16px;
}

.mockup-dots {
    display: flex;
    gap: 8px;
}

.mockup-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
}

.mockup-content {
    padding: 24px;
    min-height: 300px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.chat-bubble {
    background: #F3F4F6;
    padding: 12px 16px;
    border-radius: 12px;
    max-width: 70%;
    align-self: flex-start;
}

.chat-bubble.ai {
    background: var(--gradient-2);
    color: var(--white);
    align-self: flex-end;
}

/* 功能特性 */
.features {
    padding: 100px 0;
    background: linear-gradient(180deg, #F0F9FF 0%, #E8F5F3 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 24px;
    margin-top: 60px;
}

.feature-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: 24px;
    border: 1px solid #F0F0F0;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-2);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.03) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

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

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 48px rgba(52, 152, 219, 0.12);
    border-color: rgba(52, 152, 219, 0.3);
}

.feature-large {
    grid-column: span 2;
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1) 0%, rgba(52, 152, 219, 0.05) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary-color);
    margin-bottom: 24px;
    transition: all 0.3s ease;
}

.feature-card:hover .feature-icon {
    background: var(--gradient-2);
    color: var(--white);
    transform: scale(1.1);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.feature-card p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.feature-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: gap 0.3s ease;
}

.feature-link:hover {
    gap: 12px;
}

/* AI 能力展示 */
.ai-capabilities {
    padding: 100px 0;
    background: linear-gradient(180deg, #F0F9FF 0%, #E8F5F3 100%);
}

.capabilities-header {
    text-align: center;
    margin-bottom: 60px;
}

.capabilities-header h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.capabilities-header p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 32px;
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.capability-card {
    background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
    padding: 48px;
    border-radius: 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.capability-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.capability-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-2);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    color: var(--white);
    margin: 0 auto 24px;
}

.capability-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.capability-card p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

/* CTA 区域 */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

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

.cta-stats {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}

.stat-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.stat-item i {
    font-size: 20px;
}

.cta-section h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 40px;
}

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

.cta-buttons .btn-primary {
    background: var(--white);
    color: var(--secondary-color);
}

.cta-buttons .btn-secondary {
    background: transparent;
    border-color: var(--white);
    color: var(--white);
}

.cta-buttons .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* 页脚 */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 60px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.footer-logo-img {
    height: 65px;
    width: auto;
    display: block;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    text-decoration: none;
    transition: all 0.3s ease;
}

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

.copyright {
    font-size: 14px;
    color: #9CA3AF;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--white);
}

.footer-column a,
.footer-column p {
    display: block;
    color: #9CA3AF;
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

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

.qr-label {
    margin-top: 8px;
}

.qr-code {
    width: 120px;
    height: 120px;
    background: var(--white);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    color: var(--text-light);
    margin-top: 12px;
    overflow: hidden;
}

.qr-code img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Cookie Banner */
.cookie-banner {
    position: fixed;
    bottom: 24px;
    left: 24px;
    right: 24px;
    max-width: 600px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 24px;
    z-index: 1000;
    display: none;
}

.cookie-banner.show {
    display: block;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateY(100px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.cookie-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
}

.cookie-content p {
    font-size: 14px;
    color: var(--text-dark);
    line-height: 1.6;
}

.cookie-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.cookie-buttons {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 42px;
    }
    
    .solution-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .feature-large {
        grid-column: span 1;
    }
    
    .capabilities-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu,
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* 优化移动端菜单宽度 */
    .mobile-nav-menu {
        width: 90%;
        max-width: 360px;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .solution-tabs {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 8px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cookie-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .cta-stats {
        font-size: 18px;
        flex-direction: column;
    }
    
    .cta-section h2 {
        font-size: 28px;
    }
    
    .cta-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .cta-buttons button {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .channels {
        gap: 16px;
    }
    
    .channel-icon {
        width: 48px;
        height: 48px;
        font-size: 20px;
    }
    
    .hero-showcase {
        margin: 40px 0;
    }
    
    /* 小屏幕移动端菜单优化 */
    .mobile-nav-menu {
        width: 95%;
        max-width: 100%;
    }
    
    .mobile-menu-header {
        padding: 16px;
    }
    
    .mobile-menu-logo {
        height: 36px;
    }
    
    .mobile-nav-item {
        padding: 14px 20px;
        font-size: 14px;
    }
    
    .mobile-nav-actions {
        padding: 16px;
    }
    
    .btn-block {
        padding: 12px 20px;
        font-size: 14px;
    }
}

/* 核心优势样式 */
.advantages {
    padding: 100px 0;
    background: linear-gradient(180deg, #FFFFFF 0%, #E8F5F3 50%, #F0F9FF 100%);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.advantage-card {
    padding: 40px 32px;
    background: var(--white);
    border: 1px solid #F0F0F0;
    border-radius: 24px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-2);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.advantage-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.03) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

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

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

.advantage-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 48px rgba(52, 152, 219, 0.12);
    border-color: rgba(52, 152, 219, 0.3);
}

.advantage-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1) 0%, rgba(52, 152, 219, 0.05) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: all 0.3s ease;
}

.advantage-card:hover .advantage-icon {
    background: var(--gradient-2);
    transform: scale(1.1);
}

.advantage-icon i {
    font-size: 28px;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.advantage-card:hover .advantage-icon i {
    color: var(--white);
}

.advantage-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.advantage-card p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 15px;
}

/* 技术架构样式 */
.tech-stack {
    padding: 100px 0;
    background: linear-gradient(180deg, #F0F9FF 0%, #E8F5F3 100%);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-top: 48px;
}

.tech-card {
    padding: 32px 24px;
    background: var(--white);
    border: 1px solid #F0F0F0;
    border-radius: 16px;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tech-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
    border-color: rgba(52, 152, 219, 0.3);
}

.tech-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.08) 0%, rgba(52, 152, 219, 0.03) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: all 0.3s ease;
}

.tech-card:hover .tech-icon {
    background: var(--gradient-2);
    transform: scale(1.1);
}

.tech-icon i {
    font-size: 32px;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.tech-card:hover .tech-icon i {
    color: var(--white);
}

.tech-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.tech-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

.tech-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 64px;
}

.tech-feature-item {
    text-align: center;
    padding: 32px 24px;
    background: var(--white);
    border-radius: 16px;
    transition: all 0.3s ease;
}

.tech-feature-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
}

.tech-feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1) 0%, rgba(52, 152, 219, 0.05) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: all 0.3s ease;
}

.tech-feature-item:hover .tech-feature-icon {
    background: var(--gradient-2);
    transform: scale(1.1);
}

.tech-feature-icon i {
    font-size: 24px;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.tech-feature-item:hover .tech-feature-icon i {
    color: var(--white);
}

.tech-feature-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.tech-feature-item p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 15px;
}

/* 价格方案样式 */
.pricing {
    padding: 100px 0;
    background: linear-gradient(180deg, #E8F5F3 0%, #F0F9FF 100%);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.pricing-card {
    padding: 40px 32px;
    background: var(--white);
    border: 1px solid #F0F0F0;
    border-radius: 20px;
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: rgba(52, 152, 219, 0.3);
}

.pricing-card.recommended {
    border: 2px solid var(--primary-color);
    box-shadow: 0 12px 32px rgba(52, 152, 219, 0.15);
    background: linear-gradient(180deg, rgba(52, 152, 219, 0.02) 0%, #FFFFFF 100%);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    right: 32px;
    background: var(--gradient-2);
    color: var(--white);
    padding: 4px 16px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.pricing-card h3 {
    font-size: 24px;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.pricing-price {
    margin-bottom: 8px;
}

.price-symbol {
    font-size: 24px;
    color: var(--text-dark);
    vertical-align: top;
}

.price-amount {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-dark);
}

.price-text {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
}

.pricing-subtitle {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 8px;
}

.pricing-desc {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid #E5E7EB;
}

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

.pricing-features li {
    padding: 12px 0;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 12px;
}

.pricing-features i {
    color: var(--primary-color);
    font-size: 16px;
}

.pricing-note {
    text-align: center;
    margin-top: 32px;
    color: var(--text-light);
    font-size: 14px;
}

/* 安全承诺样式 */
.security {
    padding: 100px 0;
    background: linear-gradient(180deg, #E8F5F3 0%, #F0F9FF 100%);
}

.section-highlight {
    text-align: center;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    margin-top: 16px;
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.security-card {
    padding: 40px 32px;
    background: var(--white);
    border: 1px solid #F0F0F0;
    border-radius: 20px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.security-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-2);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.security-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: rgba(52, 152, 219, 0.3);
}

.security-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.08) 0%, rgba(52, 152, 219, 0.03) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: all 0.3s ease;
}

.security-card:hover .security-icon {
    background: var(--gradient-2);
    transform: scale(1.1);
}

.security-icon i {
    font-size: 28px;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.security-card:hover .security-icon i {
    color: var(--white);
}

.security-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.security-card > p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
    font-size: 15px;
}

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

.security-list li {
    padding: 8px 0;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.security-list i {
    color: var(--primary-color);
    font-size: 14px;
}

.commitment-section {
    margin-top: 64px;
    text-align: center;
}

.commitment-section h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.commitment-subtitle {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 48px;
}

.commitment-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.commitment-item {
    padding: 36px 32px;
    background: var(--white);
    border: 1px solid #F0F0F0;
    border-radius: 20px;
    text-align: left;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.commitment-item:hover {
    border-color: rgba(52, 152, 219, 0.4);
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08);
    transform: translateY(-4px);
}

.commitment-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.08) 0%, rgba(52, 152, 219, 0.03) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.commitment-item:hover .commitment-icon {
    background: var(--gradient-2);
    transform: scale(1.1);
}

.commitment-icon i {
    font-size: 24px;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.commitment-item:hover .commitment-icon i {
    color: var(--white);
}

.commitment-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.commitment-item p {
    color: var(--text-light);
    line-height: 1.8;
    font-size: 15px;
}

/* 响应式设计 - 新增部分 */
@media (max-width: 1024px) {
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .security-grid {
        grid-template-columns: 1fr;
    }
    
    .commitment-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-features {
        grid-template-columns: 1fr;
    }
}

/* 页脚 SEO 内容区域样式 */
.footer-seo {
    margin-top: 50px;
    padding-top: 40px;
    border-top: 2px solid rgba(255, 255, 255, 0.1);
}

.footer-seo .seo-content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 30px 50px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.footer-seo .seo-content-wrapper:hover {
    background: rgba(255, 255, 255, 0.08);
}

.footer-seo .seo-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-seo .seo-icon {
    width: 40px;
    height: 40px;
    background: var(--gradient-2);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    flex-shrink: 0;
    box-shadow: 0 4px 15px rgba(52, 152, 219, 0.3);
}

.footer-seo .seo-header h2 {
    color: #ffffff;
    font-size: 20px;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.5px;
}

.footer-seo .seo-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    line-height: 1.8;
    columns: 2;
    column-gap: 40px;
    text-align: justify;
}

.footer-seo .seo-text p {
    margin-bottom: 12px;
    break-inside: avoid;
}

.footer-seo .seo-text p:last-child {
    margin-bottom: 0;
}

.footer-seo .seo-text strong {
    color: var(--primary-color);
    font-weight: 600;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .footer-seo .seo-text {
        columns: 1;
    }
}

@media (max-width: 768px) {
    .footer-seo {
        margin-top: 30px;
        padding-top: 30px;
    }
    
    .footer-seo .seo-content-wrapper {
        padding: 25px 20px;
        border-radius: 10px;
    }
    
    .footer-seo .seo-header {
        margin-bottom: 15px;
        padding-bottom: 12px;
    }
    
    .footer-seo .seo-icon {
        width: 36px;
        height: 36px;
        font-size: 18px;
    }
    
    .footer-seo .seo-header h2 {
        font-size: 18px;
    }
    
    .footer-seo .seo-text {
        font-size: 12px;
        line-height: 1.7;
        columns: 1;
    }
    
    .footer-seo .seo-text p {
        margin-bottom: 10px;
    }
}