/* ===== CSS Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #165DFF;
    --primary-dark: #0E42D2;
    --primary-light: #4080FF;
    --primary-bg: #F0F5FF;
    --primary-bg-deep: #E1EAFF;
    --text-primary: #1D2129;
    --text-secondary: #4E5969;
    --text-tertiary: #86909C;
    --text-white: #FFFFFF;
    --bg-white: #FFFFFF;
    --bg-page: #F7F8FA;
    --bg-section: #FAFBFC;
    --border-light: #E5E6EB;
    --border-lighter: #F2F3F5;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.1);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --container-width: 1200px;
    --header-height: 72px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.7;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

img {
    max-width: 100%;
    display: block;
}

ul {
    list-style: none;
}

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

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-lighter);
    z-index: 1000;
    transition: all var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.125rem;
    color: var(--text-primary);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text {
    font-size: 1.05rem;
    letter-spacing: 0.5px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition);
    border-radius: 2px;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    overflow: hidden;
    background: linear-gradient(170deg, #FAFBFF 0%, #F0F5FF 30%, #E8EEFF 60%, #F5F7FA 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(22, 93, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(22, 93, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(22, 93, 255, 0.06) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -20%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(22, 93, 255, 0.04) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 80px 0 60px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 24px;
    background: rgba(22, 93, 255, 0.06);
    border: 1px solid rgba(22, 93, 255, 0.12);
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--primary);
    letter-spacing: 2px;
    margin-bottom: 32px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.25;
    color: var(--text-primary);
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.hero-title-highlight {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    max-width: 680px;
    margin: 0 auto 40px;
    font-size: 1.125rem;
    line-height: 1.85;
    color: var(--text-secondary);
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 64px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-white);
    box-shadow: 0 4px 16px rgba(22, 93, 255, 0.25);
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: 0 6px 24px rgba(22, 93, 255, 0.35);
    transform: translateY(-1px);
}

.btn-outline {
    background: var(--bg-white);
    color: var(--text-primary);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary);
    letter-spacing: -1px;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-light);
}

/* ===== Section Common ===== */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.3px;
}

.section-desc {
    max-width: 600px;
    margin: 0 auto;
    font-size: 1rem;
    color: var(--text-tertiary);
    line-height: 1.75;
}

/* ===== Video Section ===== */
.video-section {
    padding: 100px 0;
    background: var(--bg-white);
}

.video-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    aspect-ratio: 16 / 9;
    background: #000;
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.video-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.15);
    opacity: 0;
    transition: opacity var(--transition);
    cursor: pointer;
}

.video-wrapper:hover .video-overlay {
    opacity: 1;
}

.video-play-btn {
    background: rgba(22, 93, 255, 0.85);
    border: none;
    border-radius: 50%;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    backdrop-filter: blur(8px);
}

.video-play-btn:hover {
    transform: scale(1.1);
    background: rgba(22, 93, 255, 0.95);
}

/* ===== Products ===== */
.products {
    padding: 120px 0;
    background: var(--bg-section);
}

.product-card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-lighter);
    overflow: hidden;
    transition: all var(--transition);
}

.product-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(22, 93, 255, 0.1);
}

.product-card-featured {
    margin-bottom: 32px;
}

.product-card-featured .product-card-inner {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 40px;
    align-items: center;
}

.product-card-inner {
    padding: 48px;
}

.product-badge {
    display: inline-block;
    padding: 4px 14px;
    background: var(--primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 4px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.product-badge-alt {
    background: rgba(22, 93, 255, 0.08);
    color: var(--primary);
}

.product-name {
    font-size: 1.65rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.product-subtitle {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.product-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.85;
    margin-bottom: 28px;
}

.product-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.feature-group-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.feature-list li {
    position: relative;
    padding-left: 18px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 2.2;
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.5;
}

.product-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
}

.product-icon-large svg {
    width: 200px;
    height: 200px;
}

.product-tech-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
}

.tech-tag {
    padding: 6px 14px;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 100px;
}

.products-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

.product-capabilities {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 28px;
}

.capability {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.capability-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-bg);
    border-radius: var(--radius-sm);
    padding: 7px;
}

.capability-icon svg {
    width: 22px;
    height: 22px;
}

.capability strong {
    display: block;
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 2px;
}

.capability p {
    font-size: 0.82rem;
    color: var(--text-tertiary);
    line-height: 1.6;
    margin-bottom: 0;
}

.product-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border-lighter);
}

.metric {
    text-align: center;
}

.metric-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.metric-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

/* ===== Components ===== */
.components {
    padding: 120px 0;
    background: var(--bg-white);
}

.components-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.component-card {
    background: var(--bg-white);
    border: 1px solid var(--border-lighter);
    border-radius: var(--radius-lg);
    padding: 36px 30px;
    transition: all var(--transition);
    position: relative;
}

.component-card:hover {
    border-color: rgba(22, 93, 255, 0.15);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.component-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 24px;
    right: 24px;
    height: 3px;
    background: var(--primary);
    border-radius: 0 0 3px 3px;
    opacity: 0;
    transition: opacity var(--transition);
}

.component-card:hover::before {
    opacity: 1;
}

.component-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 20px;
}

.component-icon svg {
    width: 56px;
    height: 56px;
}

.component-name {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.component-subtitle {
    font-size: 0.85rem;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 14px;
}

.component-desc {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 20px;
}

.component-features {
    margin-bottom: 20px;
}

.component-features li {
    position: relative;
    padding-left: 16px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 2.1;
}

.component-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--primary);
    opacity: 0.4;
}

.component-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding-top: 16px;
    border-top: 1px solid var(--border-lighter);
}

.component-tech span {
    padding: 3px 10px;
    background: var(--bg-page);
    color: var(--text-tertiary);
    font-size: 0.72rem;
    font-weight: 500;
    border-radius: 4px;
}

/* ===== Architecture Diagram ===== */
.architecture-diagram {
    background: var(--bg-section);
    border-radius: var(--radius-xl);
    padding: 48px;
    text-align: center;
}

.architecture-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 36px;
}

.arch-visual {
    max-width: 800px;
    margin: 0 auto;
}

.arch-layer {
    margin-bottom: 0;
}

.arch-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.arch-items {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.arch-item {
    padding: 14px 24px;
    background: var(--bg-white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all var(--transition);
}

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

.arch-item-primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.arch-item-primary:hover {
    background: var(--primary-dark);
    color: white;
}

.arch-connector {
    padding: 8px 0;
    overflow: hidden;
}

/* ===== Advantages ===== */
.advantages {
    padding: 120px 0;
    background: linear-gradient(170deg, #0A1628 0%, #0F2440 40%, #132E52 100%);
    color: white;
}

.advantages .section-tag {
    background: rgba(22, 93, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
}

.advantages .section-title {
    color: white;
}

.advantages .section-desc {
    color: rgba(255, 255, 255, 0.5);
}

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

.advantage-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    transition: all var(--transition);
}

.advantage-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(22, 93, 255, 0.3);
    transform: translateY(-4px);
}

.advantage-number {
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--primary);
    opacity: 0.4;
    margin-bottom: 16px;
    letter-spacing: -2px;
}

.advantage-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: white;
}

.advantage-card p {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.8;
}

/* ===== Scenarios ===== */
.scenarios {
    padding: 120px 0;
    background: var(--bg-section);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.scenario-card {
    background: var(--bg-white);
    border: 1px solid var(--border-lighter);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: all var(--transition);
}

.scenario-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(22, 93, 255, 0.1);
    transform: translateY(-4px);
}

.scenario-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-bg);
    border-radius: var(--radius-md);
    padding: 14px;
}

.scenario-icon svg {
    width: 36px;
    height: 36px;
}

.scenario-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.scenario-card p {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    line-height: 1.75;
}

/* ===== About ===== */
.about {
    padding: 120px 0;
    background: var(--bg-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: 80px;
    align-items: center;
}

.about-info .section-title {
    margin-bottom: 24px;
}

.about-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-highlights {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.highlight {
    display: flex;
    gap: 16px;
    padding: 16px 20px;
    background: var(--bg-section);
    border-radius: var(--radius-md);
    align-items: center;
}

.highlight strong {
    flex-shrink: 0;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--primary);
    min-width: 72px;
}

.highlight span {
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.about-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-pattern {
    position: relative;
    width: 320px;
    height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pattern-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(22, 93, 255, 0.1);
}

.pattern-ring-1 {
    width: 320px;
    height: 320px;
    animation: rotate 60s linear infinite;
    border-style: dashed;
}

.pattern-ring-2 {
    width: 240px;
    height: 240px;
    border-color: rgba(22, 93, 255, 0.15);
    animation: rotate 45s linear infinite reverse;
}

.pattern-ring-3 {
    width: 160px;
    height: 160px;
    border-color: rgba(22, 93, 255, 0.2);
    animation: rotate 30s linear infinite;
    border-style: dashed;
}

.pattern-center {
    width: 80px;
    height: 80px;
    background: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 32px rgba(22, 93, 255, 0.3);
    z-index: 1;
}

.pattern-text {
    color: white;
    font-size: 1.5rem;
    font-weight: 900;
    letter-spacing: -2px;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== Footer ===== */
.footer {
    background: #0A1628;
    color: rgba(255, 255, 255, 0.6);
    padding-top: 64px;
}

.footer-top {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 80px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-brand .logo {
    margin-bottom: 16px;
}

.footer-brand .logo-text {
    color: white;
}

.footer-slogan {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    line-height: 1.6;
}

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

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 16px;
}

.footer-col a {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    padding: 5px 0;
    transition: color var(--transition);
}

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

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.25);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(22, 93, 255, 0.3);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }

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

    .product-card-featured .product-card-inner {
        grid-template-columns: 1fr;
    }

    .product-visual {
        display: none;
    }

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

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

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

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-visual {
        order: -1;
    }

    .about-pattern {
        width: 240px;
        height: 240px;
    }

    .pattern-ring-1 { width: 240px; height: 240px; }
    .pattern-ring-2 { width: 180px; height: 180px; }
    .pattern-ring-3 { width: 120px; height: 120px; }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }

    .nav {
        display: none;
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-lighter);
        padding: 16px;
        box-shadow: var(--shadow-md);
    }

    .nav.active {
        display: flex;
    }

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

    .hero-content {
        padding: 40px 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-desc {
        font-size: 1rem;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

    .stat-divider {
        width: 40px;
        height: 1px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .product-card-inner {
        padding: 28px;
    }

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

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

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

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

    .footer-links {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .architecture-diagram {
        padding: 28px 20px;
    }

    .arch-items {
        flex-direction: column;
        align-items: center;
    }

    .arch-connector {
        display: none;
    }

    .product-metrics {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .video-play-btn {
        width: 60px;
        height: 60px;
    }

    .video-play-btn svg {
        width: 32px;
        height: 32px;
    }
}