:root {
    --primary-color: #3B82F6;
    --primary-color2: #009823;
    --primary-dark: #2563EB;
    --primary-light: #60A5FA;
    --secondary-color: #6366F1;
    --accent-color: #10B981;
    --text-primary: #0F172A;
    --text-secondary: #64748B;
    --text-light: #94A3B8;
    --bg-primary: #FAFBFC;
    --bg-secondary: #edf0f9;
    --bg-card: #FFFFFF;
    --bg-nav-menu: rgba(251, 252, 253, 0.98);
    --bg-dark: #0B1120;
    --border-color: #E2E8F0;
    --border-dark: #1E293B;
    --gradient-primary: linear-gradient(135deg, #3B82F6 0%, #6366F1 100%);
    --gradient-hero-light: linear-gradient(180deg, #edf0f9 0%, #edf0f9 100%);
    --gradient-hero-dark: linear-gradient(180deg, #0B1120 0%, #0F1729 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.06), 0 2px 4px -2px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.06), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.06), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --radius-sm: 8px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --container-max: 1200px;
}

[data-theme="dark"] {
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-light: #64748B;
    --bg-primary: #0B1120;
    --bg-secondary: #0F1729;
    --bg-card: #111827;
    --bg-nav-menu: rgba(15, 23, 42, 0.98);
    --border-color: #1E293B;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-primary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ====== Navbar ====== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(250, 251, 252, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    height: 64px;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
}

[data-theme="dark"] .navbar {
    background: rgba(11, 17, 32, 0.8);
    border-bottom-color: var(--border-color);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    transition: color 0.2s;
}

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

.nav-link.active {
    color: var(--primary-color);
    font-weight: 500;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-contact-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 14px;
    background: #10B981;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
}

.nav-contact-btn:hover {
    background: #059669;
}

/* 导航下拉菜单 */
.nav-dropdown {
    position: relative;
    cursor: pointer;
}

.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.dropdown-toggle::after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    transition: transform 0.2s;
    margin-top: 2px;
}

.dropdown-toggle:hover::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 120px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 100;
    padding: 4px 0;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-item {
    display: block;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.2s;
    white-space: nowrap;
}

.dropdown-item:hover {
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.05);
}

.nav-tools {
    display: flex;
    align-items: center;
    gap: 4px;
}

.theme-toggle,
.lang-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.theme-toggle:hover,
.lang-toggle:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.theme-toggle svg,
.lang-toggle svg {
    display: block;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s;
    border-radius: 1px;
}

/* ====== Hero Section ====== */
/* 防止导航栏遮挡 section 内容，同时解决 hash 定位偏移问题 */
section[id] {
    scroll-margin-top: 80px;
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--gradient-hero-light);
    overflow: hidden;
}

[data-theme="dark"] .hero {
    background: var(--gradient-hero-dark);
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.1;
    top: -100px;
    right: 10%;
    background: #3B82F6;
}

.hero-glow-2 {
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.06;
    bottom: 20%;
    left: 5%;
    background: #6366F1;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 1000px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.06);
    border: 1px solid rgba(59, 130, 246, 0.12);
    border-radius: 50px;
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 32px;
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #10B981;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    line-height: 1.3;
}

[data-theme="dark"] .hero-title {
    color: #F8FAFC;
}

.hero-title .highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto 36px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.hero-btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 2px 12px rgba(59, 130, 246, 0.3);
}

.hero-btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
}

.hero-btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

[data-theme="dark"] .hero-btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    color: #E2E8F0;
}

[data-theme="dark"] .hero-btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-light);
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    padding: 28px 32px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    max-width: 580px;
    margin: 0 auto 28px;
}

[data-theme="dark"] .hero-stats {
    background: var(--bg-card);
    border-color: var(--border-color);
}

.hero-stat {
    text-align: center;
    padding: 0 16px;
    position: relative;
}

.hero-stat:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 32px;
    background: var(--border-color);
}

.stat-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.stat-number::after {
    content: '+';
    font-size: 1em;
    font-weight: 600;
}

.stat-item:last-child .stat-number::after,
.hero-stat:last-child .stat-number::after {
    display: none;
}

.stat-label {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.hero-protocols {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
}

.protocol-tag, .protocol-tag2 {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 400;
    transition: all 0.2s;
}

.protocol-tag::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--primary-color);
}

.protocol-tag2::before {
    content: '';
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--primary-color2);
}

.protocol-tag:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.protocol-tag2:hover {
    border-color: var(--primary-color2);
    color: var(--primary-color2);
}

/* ====== Section Common ====== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 30px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.section-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto;
    line-height: 1.7;
}

section {
    padding: 80px 0;
}

/* ====== Products Section ====== */
.products {
    background: var(--bg-secondary);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.3s;
    border: 1px solid var(--border-color);
    cursor: default;
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.product-icon {
    font-size: 36px;
    margin-bottom: 16px;
}

.product-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(59, 130, 246, 0.08);
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 500;
    border-radius: 4px;
    margin-bottom: 12px;
}

.product-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.product-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ====== Visualization Section ====== */
.visualization {
    background: var(--bg-primary);
}

.visualization-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.viz-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.viz-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.viz-header {
    padding: 20px 20px 0;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.viz-number {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    line-height: 1;
    margin-top: 2px;
    flex-shrink: 0;
}

.viz-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.viz-info p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.viz-image {
    width: calc(100% - 40px);
    margin: 0 20px 20px;
    height: 160px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    opacity: 0.9;
}

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

/* ====== Protocol Section ====== */
.protocol {
    background: var(--bg-secondary);
}

.protocol-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 48px;
}

.protocol-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 24px 16px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.protocol-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.protocol-icon {
    font-size: 24px;
    margin-bottom: 10px;
}

.protocol-card h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.protocol-card p {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Architecture */
.architecture {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--border-color);
}

.architecture-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 24px;
    text-align: center;
}

.architecture-layers {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.layer {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.layer:hover {
    transform: translateX(4px);
}

.application-layer {
    background: rgba(16, 185, 129, 0.06);
    border-left: 3px solid #10B981;
}

.service-layer {
    background: rgba(59, 130, 246, 0.06);
    border-left: 3px solid var(--primary-color);
}

.access-layer {
    background: rgba(245, 158, 11, 0.06);
    border-left: 3px solid #F59E0B;
}

.device-layer {
    background: rgba(107, 114, 128, 0.06);
    border-left: 3px solid #9CA3AF;
}

.layer-label {
    min-width: 72px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
    flex-shrink: 0;
}

.layer-items {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.layer-items span {
    padding: 4px 12px;
    background: var(--bg-secondary);
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    white-space: nowrap;
}

/* ====== Hardware Section ====== */
.hardware {
    background: var(--bg-primary);
}

.hardware-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.hardware-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 24px 16px;
    text-align: center;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.hardware-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.hardware-icon {
    font-size: 30px;
    margin-bottom: 12px;
}

.hardware-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.hardware-card p {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ====== Video Section ====== */
.video {
    background: var(--bg-secondary);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.video-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all 0.3s;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.video-icon {
    font-size: 32px;
    margin-bottom: 14px;
}

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

.video-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ====== Enterprise Section ====== */
.enterprise {
    background: var(--bg-primary);
}

.enterprise-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 48px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    transition: all 0.3s;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(59, 130, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--primary-color);
}

.stat-card .stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
    display: block;
}

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

.industry-distribution {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-bottom: 48px;
}

.industry-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px 16px;
    text-align: center;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.industry-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.industry-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.industry-card h3 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.industry-card .industry-percent {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.industry-progress {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}

.industry-progress-bar {
    height: 100%;
    border-radius: 2px;
    transition: width 1s ease-out;
}

.enterprise-partners {
    margin-top: 48px;
}

.partners-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 8px;
}

.partners-desc {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 20px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.marquee-container {
    overflow: hidden;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px 0;
}

.marquee-content {
    display: flex;
    gap: 12px;
    animation: marquee 35s linear infinite;
    white-space: nowrap;
}

.marquee-content span {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-radius: 6px;
    font-size: 12px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    flex-shrink: 0;
}

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

/* ====== Solutions Section ====== */
.solutions {
    background: var(--bg-secondary);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.solution-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.solution-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.solution-image {
    width: 100%;
    height: 180px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    opacity: 0.85;
}

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

.solution-content {
    padding: 20px;
}

.solution-content h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.solution-content p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 14px;
    line-height: 1.7;
}

.solution-tags {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.solution-tags span {
    padding: 4px 10px;
    background: var(--bg-secondary);
    border-radius: 4px;
    font-size: 12px;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

/* ====== Pricing ====== */
.pricing {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 20px;
    font-size: 13px;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 16px;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    max-width: 1000px;
    margin: 48px auto 0;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 28px;
    transition: all 0.3s;
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-color), var(--shadow-lg);
}

.pricing-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    width: fit-content;
    margin-bottom: 20px;
}

.pricing-tag.community {
    background: rgba(16, 185, 129, 0.1);
    color: #10B981;
}

.pricing-tag.commercial {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
}

.pricing-tag.cluster {
    background: rgba(139, 92, 246, 0.1);
    color: #8B5CF6;
}

.pricing-price {
    margin-bottom: 12px;
}

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

.pricing-price .price-amount {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-primary);
}

.pricing-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0 0 16px;
    line-height: 1.5;
}

.pricing-renewal {
    font-size: 12px;
    color: var(--text-light);
    padding: 12px 0;
    border-top: 1px solid var(--border-color);
    margin-bottom: 16px;
}

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
    flex-grow: 1;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
}

.check-icon {
    color: #10B981;
    flex-shrink: 0;
}

.pricing-note {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.pricing-spec {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-light);
    padding: 12px 0;
    border-top: 1px solid var(--border-color);
    margin-bottom: 16px;
}

.pricing-spec svg {
    flex-shrink: 0;
    color: var(--text-light);
}

.pricing-btn {
    display: block;
    width: 100%;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.pricing-btn-primary {
    background: linear-gradient(135deg, var(--primary-color), #7C3AED);
    color: #fff;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.pricing-btn-primary:hover {
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}

.pricing-btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.pricing-btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: rgba(59, 130, 246, 0.05);
}

.pricing-btn-purple {
    border-color: #8B5CF6;
}

.pricing-btn-purple:hover {
    border-color: #8B5CF6;
    color: #8B5CF6;
    background: rgba(139, 92, 246, 0.05);
}

/* ====== Footer ====== */
.footer {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 48px 0 24px;
    border-top: 1px solid var(--border-color);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 32px;
    gap: 40px;
}

.footer-brand {
    max-width: 280px;
}

.footer-brand .logo {
    margin-bottom: 12px;
}

.footer-brand p {
    color: var(--text-secondary);
    font-size: 13px;
}

.footer-links {
    display: flex;
    gap: 48px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    margin-bottom: 8px;
    transition: color 0.2s;
}

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

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 16px;
    text-align: center;
    font-size: 12px;
    color: var(--text-secondary);
}

.filingInfo {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

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

/* ====== Scrollbar ====== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

html {
    scrollbar-width: thin;
    scrollbar-color: var(--text-light) var(--bg-primary);
}

/* ====== Floating Sidebar & Panels ====== */
.floating-sidebar {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.sidebar-item {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    cursor: pointer;
    transition: all 0.3s;
}

.sidebar-item:hover {
    background: rgba(59, 130, 246, 0.2);
    border-color: rgba(59, 130, 246, 0.3);
    transform: translateX(-4px);
}

.sidebar-item[data-panel="wechat"]:hover .sidebar-icon,
.sidebar-item[data-panel="business"]:hover .sidebar-icon {
    color: #10B981;
}

.sidebar-item[data-panel="qq"]:hover .sidebar-icon,
.sidebar-item[data-panel="email"]:hover .sidebar-icon {
    color: #3B82F6;
}

.sidebar-item.active {
    background: rgba(59, 130, 246, 0.3);
    border-color: rgba(59, 130, 246, 0.5);
}

.sidebar-item[data-panel="wechat"].active,
.sidebar-item[data-panel="business"].active {
    background: rgba(16, 185, 129, 0.2);
    border-color: rgba(16, 185, 129, 0.4);
}

.sidebar-item[data-panel="wechat"].active .sidebar-icon,
.sidebar-item[data-panel="business"].active .sidebar-icon {
    color: #10B981;
}

.sidebar-item[data-panel="qq"].active,
.sidebar-item[data-panel="email"].active {
    background: rgba(59, 130, 246, 0.2);
    border-color: rgba(59, 130, 246, 0.4);
}

.sidebar-item[data-panel="qq"].active .sidebar-icon,
.sidebar-item[data-panel="email"].active .sidebar-icon {
    color: #3B82F6;
}

.sidebar-icon {
    color: var(--text-secondary);
    transition: color 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-dot {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--primary-color);
    opacity: 0;
    transition: opacity 0.3s;
}

.sidebar-item.active .sidebar-dot {
    opacity: 1;
}

.sidebar-item[data-panel="wechat"].active .sidebar-dot {
    background: #10B981;
}

.sidebar-item[data-panel="business"].active .sidebar-dot {
    background: #10B981;
}

.sidebar-item[data-panel="qq"].active .sidebar-dot {
    background: #3B82F6;
}

.sidebar-item[data-panel="email"].active .sidebar-dot {
    background: #3B82F6;
}

/* ====== Sidebar Panels ====== */
.sidebar-panel {
    position: fixed;
    right: 76px;
    top: 50%;
    transform: translateY(-50%);
    width: 300px;
    background: rgba(15, 23, 42, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    z-index: 1001;
    display: none;
}

.sidebar-panel.active {
    display: block;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.panel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.panel-dot.green {
    background: #10B981;
}

.panel-dot.blue {
    background: #3B82F6;
}

.panel-header h3 {
    font-size: 15px;
    font-weight: 600;
    color: #F8FAFC;
    margin: 0;
}

.panel-desc {
    font-size: 13px;
    color: #94A3B8;
    line-height: 1.6;
    margin: 0;
}

/* Wechat Panel */
.wechat-panel .panel-desc {
    cursor: pointer;
}

.wechat-panel .panel-desc:hover {
    color: var(--primary-color);
}

/* Business Panel - QR Code */
.business-panel {
    width: 260px;
}

.qr-code {
    width: 200px;
    height: 200px;
    margin: 16px auto;
    background: #fff;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.qr-hint {
    font-size: 12px;
    color: #64748B;
    text-align: center;
    margin: 0;
}

/* QQ Panel */
.qq-groups {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.qq-group {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.qq-group:hover {
    background: rgba(59, 130, 246, 0.15);
}

.qq-group svg {
    color: #64748B;
    flex-shrink: 0;
}

.qq-group span {
    font-size: 14px;
    color: #94A3B8;
    font-family: monospace;
}

.copy-hint {
    font-size: 12px;
    color: #64748B;
    text-align: center;
    margin: 0;
}

/* Email Panel */
.email-address {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 12px;
}

.email-address:hover {
    background: rgba(59, 130, 246, 0.2);
}

.email-address svg {
    color: #3B82F6;
    flex-shrink: 0;
}

.email-address span {
    font-size: 14px;
    color: #F8FAFC;
    font-family: monospace;
}

/* ====== Light Theme - Sidebar ====== */
body:not([data-theme="dark"]) .sidebar-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
}

body:not([data-theme="dark"]) .sidebar-item:hover {
    background: rgba(59, 130, 246, 0.08);
    border-color: var(--primary-color);
}

body:not([data-theme="dark"]) .sidebar-item[data-panel="wechat"]:hover,
body:not([data-theme="dark"]) .sidebar-item[data-panel="business"]:hover {
    background: rgba(16, 185, 129, 0.08);
    border-color: #10B981;
}

body:not([data-theme="dark"]) .sidebar-item[data-panel="qq"]:hover,
body:not([data-theme="dark"]) .sidebar-item[data-panel="email"]:hover {
    background: rgba(59, 130, 246, 0.08);
    border-color: #3B82F6;
}

body:not([data-theme="dark"]) .sidebar-item.active {
    background: rgba(59, 130, 246, 0.08);
    border-color: var(--primary-color);
}

body:not([data-theme="dark"]) .sidebar-item[data-panel="wechat"].active,
body:not([data-theme="dark"]) .sidebar-item[data-panel="business"].active {
    background: rgba(16, 185, 129, 0.08);
    border-color: #10B981;
}

body:not([data-theme="dark"]) .sidebar-item[data-panel="qq"].active,
body:not([data-theme="dark"]) .sidebar-item[data-panel="email"].active {
    background: rgba(59, 130, 246, 0.08);
    border-color: #3B82F6;
}

body:not([data-theme="dark"]) .sidebar-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

body:not([data-theme="dark"]) .panel-header h3 {
    color: var(--text-primary);
}

body:not([data-theme="dark"]) .panel-desc {
    color: var(--text-secondary);
}

body:not([data-theme="dark"]) .qq-group {
    background: var(--bg-secondary);
}

body:not([data-theme="dark"]) .qq-group:hover {
    background: rgba(59, 130, 246, 0.08);
}

body:not([data-theme="dark"]) .qq-group svg {
    color: var(--text-light);
}

body:not([data-theme="dark"]) .qq-group span {
    color: var(--text-primary);
}

body:not([data-theme="dark"]) .email-address {
    background: rgba(59, 130, 246, 0.06);
}

body:not([data-theme="dark"]) .email-address:hover {
    background: rgba(59, 130, 246, 0.1);
}

body:not([data-theme="dark"]) .email-address span {
    color: var(--text-primary);
}

body:not([data-theme="dark"]) .copy-hint {
    color: var(--text-light);
}

body:not([data-theme="dark"]) .qr-hint {
    color: var(--text-secondary);
}

/* ====== Back to Top ====== */
.back-to-top {
    position: fixed;
    right: 16px;
    bottom: 24px;
    z-index: 999;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary-color);
    color: #fff;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    transition: all 0.3s;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
}

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

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.4);
}

.back-to-top svg {
    display: block;
}

/* ====== Why Choose Section ====== */
.why-choose {
    background: var(--bg-secondary);
}

.why-choose-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.why-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.3s;
    cursor: default;
}

.why-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.why-icon {
    color: var(--primary-color);
    margin-bottom: 16px;
}

.why-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.why-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ====== License Section ====== */
.license {
    background: var(--bg-primary);
}

.license-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 40px;
    margin-bottom: 32px;
}

.license-tab {
    padding: 10px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

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

.license-tab.active {
    background: rgba(59, 130, 246, 0.1);
    border-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 500;
}

.license-content {
    margin-top: 0;
}

.license-tab-content {
    display: none;
}

.license-tab-content.active {
    display: block;
}

.license-service-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.license-service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    transition: all 0.3s;
}

.license-service-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.service-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(59, 130, 246, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    flex-shrink: 0;
}

.license-service-card p {
    font-size: 14px;
    color: var(--text-primary);
    font-weight: 500;
    line-height: 1.5;
}

.license-tab-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.license-tab-panel h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.license-tab-panel p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.subscription-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 20px;
}

.sub-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.valueadd-modules {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

.valueadd-module {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
}

.valueadd-module h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.valueadd-module p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 0;
}

.thirdparty-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 20px 0;
}

.thirdparty-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.tech-tag {
    padding: 4px 10px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    font-family: monospace;
}

.thirdparty-item span:last-child {
    font-size: 13px;
    color: var(--text-secondary);
}

.qualification-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin-top: 20px;
}

.qualification-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
}

.qualification-item .check-icon {
    color: var(--primary-color);
}

/* ====== Comparison Section ====== */
.comparison {
    background: var(--bg-primary);
}

.comparison-table-wrapper {
    overflow-x: auto;
    margin-top: 48px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.comparison-table th,
.comparison-table td {
    padding: 14px 20px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    font-weight: 600;
    color: var(--text-primary);
    /*background: rgba(0, 0, 0, 0.2);*/
    font-size: 14px;
}

.comparison-table th:first-child,
.comparison-table td:first-child {
    text-align: left;
    color: var(--text-secondary);
}

.comparison-table tr:hover td {
    background: rgba(59, 130, 246, 0.05);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

/* Group header */
.comparison-table .group-header-cell {
    background: rgba(59, 130, 246, 0.08);
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table .group-header-cell:first-child {
    cursor: pointer;
    border-left: 3px solid var(--primary-color);
    text-align: left;
}

.comparison-table .group-header-cell:hover {
    background: rgba(59, 130, 246, 0.15);
}

.comparison-table .group-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
    width: 100%;
}

.comparison-table .group-toggle {
    font-size: 10px;
    transition: transform 0.3s;
    color: var(--primary-color);
    display: inline-block;
}

.comparison-table .group-toggle.collapsed {
    transform: rotate(-90deg);
}

.comparison-table .group-count {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 400;
}

.comparison-table .group-body {
    transition: all 0.3s;
}

.comparison-table .group-body.collapsed {
    display: none;
}

.check-yes {
    color: #10B981;
}

.check-no {
    color: #6B7280;
}

/* ====== Developer Services ====== */
.developer-services {
    background: var(--bg-primary);
}

.dev-services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.dev-service-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all 0.3s;
    cursor: default;
}

.dev-service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.dev-service-icon {
    color: var(--primary-color);
    margin-bottom: 16px;
}

.dev-service-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.dev-service-card p {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ====== Open Source Section ====== */
.open-source {
    background: var(--bg-secondary);
    padding: 80px 0;
}

.open-source-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

/* Left Side: Info + Buttons */
.open-source-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.open-source-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 50px;
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 500;
    width: fit-content;
}

.open-source-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #10B981;
}

.open-source-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
}

.open-source-description {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0;
}

.open-source-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.oss-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

/* Gitee Button - Blue Gradient */
.gitee-btn {
    background: linear-gradient(135deg, #3B82F6 0%, #2563EB 100%);
    color: #fff;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.gitee-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.4);
}

/* GitHub Button - Dark Background */
.github-btn {
    background: #24292e;
    color: #fff;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .github-btn {
    background: #2d333b;
}

.github-btn:hover {
    transform: translateY(-2px);
    background: #1b1f23;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .github-btn:hover {
    background: #24282e;
}

/* Right Side: Repository Cards */
.open-source-repos {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.repo-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all 0.3s;
}

.repo-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.repo-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.repo-logo {
    flex-shrink: 0;
}

.gitee-logo {
    color: #C71D23;
}

.github-logo {
    color: var(--text-primary);
}

[data-theme="dark"] .github-logo {
    color: #F8FAFC;
}

.repo-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.repo-path {
    font-size: 13px;
    color: var(--text-secondary);
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}

.repo-stats {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.repo-stat {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}

.repo-stat svg {
    color: var(--text-light);
    flex-shrink: 0;
}

.repo-stat .stat-value {
    font-weight: 600;
    color: var(--text-primary);
}

.repo-stat .stat-label {
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 1024px) {
    .open-source-layout {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .open-source-info {
        text-align: center;
        align-items: center;
    }

    .open-source-buttons {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .license-service-grid {
        display: grid;
        grid-template-columns: repeat(1, 1fr);
        gap: 16px;
    }

    .industry-distribution {
        display: grid;
        grid-template-columns: repeat(1, 1fr);
        gap: 12px;
        margin-bottom: 48px;
    }

    .open-source {
        padding: 60px 0;
    }

    .open-source-title {
        font-size: 24px;
    }

    .open-source-description {
        font-size: 14px;
    }

    .open-source-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .oss-btn {
        justify-content: center;
    }

    .repo-stats {
        gap: 16px;
    }
}

/* ====== Contact Section ====== */
.contact {
    background: var(--bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 48px;
}

.contact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    text-align: center;
    transition: all 0.3s;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.contact-icon {
    color: var(--primary-color);
    margin-bottom: 14px;
}

.contact-card h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.contact-detail {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-qr {
    display: flex;
    justify-content: center;
    margin-top: 32px;
}

.qr-item {
    text-align: center;
}

.qr-item img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 12px;
}

.qr-item p {
    font-size: 13px;
    color: var(--text-secondary);
}

.contact-demo {
    margin-top: 32px;
    text-align: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.contact-demo h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.demo-info p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

/* ====== CTA Section ====== */
.cta {
    background: var(--gradient-hero-dark);
    padding: 80px 0;
    text-align: center;
}

[data-theme="dark"] .cta {
    background: linear-gradient(180deg, #0F1729 0%, #0B1120 100%);
}

body:not([data-theme="dark"]) .cta {
    background: linear-gradient(135deg, #3B82F6 0%, #6366F1 100%);
}

.cta-content {
    max-width: 680px;
    margin: 0 auto;
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.cta-subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 36px;
    line-height: 1.7;
}

.cta-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.cta-btn-primary {
    background: #fff;
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.cta-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

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

.cta-btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
}

/* ====== Responsive ====== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 36px;
    }

    .products-grid,
    .visualization-grid,
    .video-grid,
    .solutions-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .why-choose-grid,
    .dev-services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .cta-title {
        font-size: 28px;
    }

    .protocol-grid,
    .hardware-grid,
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .pricing-card.featured {
        border-color: var(--border-color);
        box-shadow: var(--shadow-lg);
    }
}

@media (max-width: 768px) {
    /* Mobile Menu */
    .nav-menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100vh;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 0;
        background: var(--bg-nav-menu);
        backdrop-filter: blur(20px);
        z-index: 999;
        transform: translateY(-100%);
        transition: transform 0.3s ease;
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-menu li {
        width: 100%;
        text-align: center;
    }

    .nav-menu .nav-link {
        display: block;
        padding: 20px 24px;
        font-size: 14px;
        font-weight: 500;
        color: var(--text-primary);
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        transition: background 0.2s;
    }

    .nav-menu .nav-link:hover {
        background: rgba(255, 255, 255, 0.05);
    }

    .nav-menu .nav-link.active {
        color: var(--primary-color);
        background: rgba(59, 130, 246, 0.1);
    }

    /* 移动端下拉菜单展开状态 */
    .nav-dropdown .dropdown-menu {
        position: static;
        opacity: 0;
        max-height: 0;
        overflow: hidden;
        box-shadow: none;
        border: none;
        background: transparent;
        min-width: auto;
        transition: max-height 0.3s ease, opacity 0.2s ease;
    }

    .nav-dropdown .dropdown-menu.open {
        opacity: 1;
        max-height: 300px;
        padding: 0;
    }

    .nav-dropdown .dropdown-menu .dropdown-item {
        padding-left: 48px;
        padding-right: 48px;
        color: var(var(--text-primary));
        font-size: 14px;
        border-bottom: none;
        transition: background 0.2s, color 0.2s;
    }

    .nav-dropdown .dropdown-menu .dropdown-item:hover {
        background: rgba(59, 130, 246, 0.15);
        color: #fff;
    }

    /* 移动端 dropdown-toggle 箭头旋转动画 */
    .nav-dropdown.expanded .dropdown-toggle::after {
        transform: rotate(180deg);
    }

    .nav-right .nav-contact-btn {
        display: none;
    }

    /* Hamburger X animation */
    .hamburger {
        display: flex;
        z-index: 1001;
    }

    .hamburger span {
        background: var(--text-primary);
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* 手机端 hero 内容增加顶部间距，避免与导航栏太近 */
    .hero-content {
        padding-top: 60px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-description {
        font-size: 14px;
    }

    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
        padding: 20px;
    }

    .hero-stat:not(:last-child)::after {
        display: none;
    }

    .stat-number {
        font-size: 22px;
    }

    .section-title {
        font-size: 24px;
    }

    section {
        padding: 60px 0;
    }

    .why-choose-grid,
    .dev-services-grid,
    .products-grid,
    .visualization-grid,
    .video-grid,
    .solutions-grid,
    .protocol-grid,
    .hardware-grid,
    .contact-grid,
    .pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-grid {
        max-width: 400px;
    }

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

    .cta-title {
        font-size: 24px;
    }

    .cta-subtitle {
        font-size: 14px;
    }

    .enterprise-stats {
        gap: 24px;
    }

    .enterprise-stats .stat-number {
        font-size: 28px;
    }

    .footer-content {
        flex-direction: column;
    }

    .footer-links {
        gap: 24px;
        flex-wrap: wrap;
    }

    .architecture-layers {
        gap: 8px;
    }

    .layer {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 12px 14px;
    }

    .layer-label {
        min-width: auto;
    }

    .floating-sidebar {
        display: none;
    }

    .sidebar-panel {
        display: none !important;
    }

    .back-to-top {
        right: 12px;
        bottom: 16px;
        width: 40px;
        height: 40px;
    }
}

/* ====== Animations ====== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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