/* ============================================
   KNX Smart Lighting Website - Styles
   深圳市优智软件有限公司
   ============================================ */

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

:root {
    --color-bg: #0a0e17;
    --color-bg-2: #111827;
    --color-bg-3: #1a2332;
    --color-surface: #1e293b;
    --color-surface-2: #253347;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-light: rgba(255, 255, 255, 0.12);
    --color-text: #f1f5f9;
    --color-text-2: #94a3b8;
    --color-text-3: #64748b;
    --color-primary: #00b4ff;
    --color-primary-dark: #0088cc;
    --color-primary-glow: rgba(0, 180, 255, 0.15);
    --color-accent: #00d4ff;
    --color-accent-2: #0066ff;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --container-max: 1280px;
    --nav-height: 72px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(0, 180, 255, 0.15);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- Navigation ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.95);
    box-shadow: var(--shadow-md);
}

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

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

.logo-icon svg,
.logo-icon img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 0.5px;
}

.logo-slogan {
    font-size: 11px;
    color: var(--color-text-3);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

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

.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-2);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--color-primary);
    border-radius: 1px;
}

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

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ---------- Hero Section ---------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    overflow: hidden;
}

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

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 70%);
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-2), transparent 70%);
    top: -200px;
    right: -100px;
}

.hero-glow-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-primary), transparent 70%);
    bottom: -150px;
    left: -100px;
    opacity: 0.25;
}

.hero-particles {
    position: absolute;
    inset: 0;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--color-primary-glow);
    border: 1px solid rgba(0, 180, 255, 0.2);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 32px;
    animation: fadeInUp 0.8s ease;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 24px;
    animation: fadeInUp 0.8s ease 0.1s both;
}

.title-line {
    display: block;
}

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

.hero-desc {
    font-size: 18px;
    color: var(--color-text-2);
    max-width: 680px;
    margin: 0 auto 40px;
    line-height: 1.8;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-family);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent-2));
    color: white;
    box-shadow: 0 4px 20px rgba(0, 180, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 180, 255, 0.4);
}

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

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-3);
}

/* ---------- Hero Stats ---------- */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    animation: fadeInUp 0.8s ease 0.4s both;
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-text), var(--color-text-2));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-3);
    margin-top: 4px;
}

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

/* ---------- Scroll Indicator ---------- */
.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-3);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 2px;
    animation: fadeInUp 0.8s ease 0.5s both;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    animation: scrollPulse 2s ease infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ---------- Sections ---------- */
.section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    margin-bottom: 16px;
    color: var(--color-text);
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-2);
    max-width: 560px;
    margin: 0 auto;
}

/* ---------- Products ---------- */
.products {
    background: var(--color-bg);
}

.products::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-primary-glow), transparent 70%);
    opacity: 0.3;
    pointer-events: none;
}

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

.product-card {
    position: relative;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition);
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}

.product-card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 180, 255, 0.2);
    box-shadow: var(--shadow-glow);
}

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

.product-featured {
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(0, 180, 255, 0.05) 100%);
    border-color: rgba(0, 180, 255, 0.15);
}

.product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 12px;
    font-size: 11px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent-2));
    color: white;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.badge-multi {
    background: linear-gradient(135deg, #10b981, #059669);
}

.badge-pro {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.product-icon {
    width: 64px;
    height: 64px;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.product-icon svg {
    width: 100%;
    height: 100%;
}

.product-name {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
    line-height: 1.4;
}

.product-version {
    font-size: 13px;
    color: var(--color-primary);
    margin-bottom: 16px;
    font-weight: 500;
}

.product-desc {
    font-size: 14px;
    color: var(--color-text-2);
    line-height: 1.7;
    margin-bottom: 24px;
}

.product-features {
    margin-bottom: 24px;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 14px;
    color: var(--color-text-2);
    border-bottom: 1px solid var(--color-border);
}

.product-features li:last-child {
    border-bottom: none;
}

.feature-check {
    width: 18px;
    height: 18px;
    color: var(--color-success);
    flex-shrink: 0;
}

.product-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-tag {
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 500;
    background: rgba(0, 180, 255, 0.1);
    color: var(--color-primary);
    border-radius: 100px;
    border: 1px solid rgba(0, 180, 255, 0.15);
}

/* ---------- Video Showcase ---------- */
.video-showcase {
    background: var(--color-bg);
    overflow: hidden;
}

.video-showcase::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--color-primary-glow), transparent 70%);
    opacity: 0.2;
    pointer-events: none;
}

.video-wrapper {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 48px;
    align-items: center;
}

.video-container {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    aspect-ratio: 16 / 9;
}

.video-poster {
    position: relative;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.poster-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.video-poster:hover .poster-image {
    transform: scale(1.05);
}

.video-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        to top,
        rgba(10, 14, 23, 0.95) 0%,
        rgba(10, 14, 23, 0.4) 50%,
        rgba(10, 14, 23, 0.2) 100%
    );
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 32px;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent-2));
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 40px rgba(0, 180, 255, 0.4);
    transition: all 0.3s ease;
}

.play-button svg {
    width: 32px;
    height: 32px;
    color: white;
    margin-left: 4px;
}

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 12px 50px rgba(0, 180, 255, 0.5);
}

.play-button::before {
    content: '';
    position: absolute;
    inset: -8px;
    border: 2px solid rgba(0, 180, 255, 0.3);
    border-radius: 50%;
    animation: playPulse 2s ease-in-out infinite;
}

@keyframes playPulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0; }
}

.video-info {
    position: relative;
    z-index: 1;
}

.video-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(0, 180, 255, 0.2);
    color: var(--color-primary);
    font-size: 12px;
    font-weight: 600;
    border-radius: 100px;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.video-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.video-duration {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--color-text-2);
}

.video-duration svg {
    width: 16px;
    height: 16px;
}

.video-player {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: none;
}

.video-player.active {
    display: block;
}

.video-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.video-feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.video-feature-item:hover {
    border-color: rgba(0, 180, 255, 0.2);
    box-shadow: var(--shadow-glow);
}

.feature-icon-small {
    width: 44px;
    height: 44px;
    min-width: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-glow);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
}

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

.feature-text h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.feature-text p {
    font-size: 13px;
    color: var(--color-text-3);
}

/* ---------- Features ---------- */
.features {
    background: var(--color-bg-2);
}

.features::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 20% 80%, rgba(0, 102, 255, 0.05), transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.05), transparent 50%);
    pointer-events: none;
}

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

.feature-card {
    padding: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-light);
    box-shadow: var(--shadow-md);
}

.feature-icon-wrap {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary-glow);
    border-radius: var(--radius-md);
    margin-bottom: 20px;
}

.feature-icon {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-text);
}

.feature-desc {
    font-size: 14px;
    color: var(--color-text-2);
    line-height: 1.7;
}

/* ---------- Architecture ---------- */
.architecture {
    background: var(--color-bg);
    overflow: hidden;
}

.arch-diagram {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.arch-layer {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.arch-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    transition: all var(--transition);
    min-width: 160px;
    justify-content: center;
}

.arch-item:hover {
    border-color: rgba(0, 180, 255, 0.3);
    box-shadow: var(--shadow-glow);
}

.arch-item-wide {
    min-width: 360px;
}

.arch-icon {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.arch-icon svg {
    width: 100%;
    height: 100%;
}

.arch-connector {
    width: 100%;
    display: flex;
    justify-content: center;
    color: var(--color-primary);
    opacity: 0.5;
}

.arch-connector svg {
    width: 40px;
}

/* ---------- About ---------- */
.about {
    background: var(--color-bg-2);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content .section-tag {
    text-align: left;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-desc {
    font-size: 15px;
    color: var(--color-text-2);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-highlights {
    display: flex;
    gap: 40px;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--color-border);
}

.highlight-number {
    font-size: 32px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.highlight-label {
    font-size: 13px;
    color: var(--color-text-3);
    margin-top: 4px;
}

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

.visual-card {
    width: 280px;
    height: 280px;
    background: linear-gradient(135deg, var(--color-surface), var(--color-bg-3));
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    position: relative;
}

.visual-card::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, transparent, var(--color-primary), transparent, var(--color-accent-2), transparent);
    opacity: 0.15;
    animation: rotate 8s linear infinite;
}

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

.visual-icon {
    width: 100px;
    height: 100px;
    color: var(--color-primary);
}

.visual-icon svg {
    width: 100%;
    height: 100%;
}

.visual-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-2);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ---------- Contact ---------- */
.contact {
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 48px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.contact-card:hover {
    border-color: var(--color-border-light);
}

.contact-icon {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-icon svg {
    width: 100%;
    height: 100%;
}

.contact-detail h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--color-text);
}

.contact-detail p {
    font-size: 14px;
    color: var(--color-text-2);
}

/* ---------- Contact Form ---------- */
.contact-form-wrap {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.contact-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group-full {
    grid-column: 1 / -1;
}

.contact-form label {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-2);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
    padding: 12px 16px;
    background: var(--color-bg-2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 14px;
    font-family: var(--font-family);
    transition: all var(--transition);
    outline: none;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--color-text-3);
}

.contact-form select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.btn-submit {
    grid-column: 1 / -1;
    justify-content: center;
    padding: 16px;
    font-size: 16px;
}

/* ---------- Footer ---------- */
.footer {
    background: var(--color-bg-2);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-desc {
    font-size: 14px;
    color: var(--color-text-3);
    margin-top: 16px;
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--color-text);
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 14px;
    color: var(--color-text-3);
    transition: color var(--transition);
}

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--color-text-3);
}

.footer-cert {
    display: flex;
    gap: 12px;
}

.cert-badge {
    display: inline-block;
    padding: 4px 12px;
    font-size: 11px;
    font-weight: 600;
    background: rgba(0, 180, 255, 0.08);
    color: var(--color-primary);
    border: 1px solid rgba(0, 180, 255, 0.15);
    border-radius: 100px;
    letter-spacing: 1px;
    text-decoration: none;
    transition: all var(--transition);
}

.cert-badge:hover {
    background: rgba(0, 180, 255, 0.15);
    border-color: rgba(0, 180, 255, 0.3);
}

/* ---------- Animations ---------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Scroll reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Particles ---------- */
.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: var(--color-primary);
    border-radius: 50%;
    opacity: 0;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% { opacity: 0; transform: translateY(0) scale(0); }
    20% { opacity: 0.6; transform: translateY(-20px) scale(1); }
    80% { opacity: 0.6; transform: translateY(-80px) scale(1); }
    100% { opacity: 0; transform: translateY(-100px) scale(0); }
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: 1fr;
        max-width: 560px;
        margin: 0 auto;
    }

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

    .video-wrapper {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .video-features {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .video-feature-item {
        flex: 1;
        min-width: 200px;
    }

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

    .about-content .section-tag,
    .about-content .section-title {
        text-align: center;
    }

    .about-desc {
        text-align: center;
    }

    .about-highlights {
        justify-content: center;
    }

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

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

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

    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(10, 14, 23, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-stats {
        gap: 20px;
    }

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

    .hero-desc br {
        display: none;
    }

    .hero-actions {
        flex-direction: column;
    }

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

    .video-wrapper {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .video-features {
        flex-direction: column;
    }

    .video-feature-item {
        min-width: 100%;
    }

    .video-container {
        border-radius: var(--radius-md);
    }

    .play-button {
        width: 64px;
        height: 64px;
    }

    .play-button svg {
        width: 24px;
        height: 24px;
    }

    .video-overlay {
        padding: 20px;
    }

    .video-title {
        font-size: 16px;
    }

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

    .arch-item {
        width: 100%;
        max-width: 300px;
    }

    .arch-item-wide {
        min-width: auto;
        max-width: 300px;
    }

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

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

    .footer-bottom {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .about-highlights {
        flex-direction: column;
        align-items: center;
        gap: 24px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .hero-desc {
        font-size: 15px;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 16px;
    }

    .stat-divider {
        display: none;
    }

    .product-card {
        padding: 28px 20px;
    }

    .section {
        padding: 60px 0;
    }

    .contact-form-wrap {
        padding: 24px 16px;
    }
}