/* ============================================
   OneChat · 一聊 - Light Glassmorphism Theme
   Design System: Poppins + Open Sans
   Primary: #0891B2 | CTA: #22C55E
   ============================================ */

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #0891B2;
    --primary-dark: #0E7490;
    --primary-light: #22D3EE;
    --cta: #22C55E;
    --cta-dark: #16A34A;
    --bg-body: #F8FFFE;
    --bg-section-alt: #F0FDFA;
    --bg-card: rgba(255, 255, 255, 0.7);
    --bg-glass: rgba(255, 255, 255, 0.55);
    --text-heading: #0F172A;
    --text-body: #334155;
    --text-muted: #64748B;
    --border-light: rgba(8, 145, 178, 0.12);
    --border-glass: rgba(255, 255, 255, 0.5);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(8, 145, 178, 0.08);
    --shadow-lg: 0 12px 40px rgba(8, 145, 178, 0.12);
    --shadow-xl: 0 20px 60px rgba(8, 145, 178, 0.15);
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --blur: 16px;
}

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-body);
    color: var(--text-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Poppins', 'Open Sans', sans-serif;
    color: var(--text-heading);
}

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

/* Special wider container for hero section */
.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1400px;
    padding: 0 24px;
}

/* ============================================
   Navigation - Floating Glass Bar
   ============================================ */
.navbar {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 48px);
    max-width: 1200px;
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border: 1px solid var(--border-glass);
    border-radius: 16px;
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.85);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    width: 100%;
    margin: 0;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
    position: relative;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none !important;
}

.nav-logo:hover,
.nav-logo:focus,
.nav-logo:active,
.nav-logo:visited {
    text-decoration: none !important;
    border-bottom: none !important;
}

.nav-logo span {
    text-decoration: none !important;
}

.logo-icon {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.nav-logo .logo-text {
    font-family: 'Poppins', sans-serif;
    font-size: 22px;
    font-weight: 700;
    display: flex;
    align-items: baseline;
    gap: 6px;
    color: var(--text-heading);
}

.onechat-wrapper {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-sm);
    background: rgba(8, 145, 178, 0.04);
    backdrop-filter: blur(8px);
    box-shadow: 0 2px 8px rgba(8, 145, 178, 0.06);
    transition: all 0.3s ease;
    height: 36px;
}

.onechat-wrapper:hover {
    border-color: rgba(8, 145, 178, 0.3);
    background: rgba(8, 145, 178, 0.08);
    box-shadow: 0 3px 12px rgba(8, 145, 178, 0.12);
    transform: translateY(-1px);
}

.nav-one-bubble {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    padding: 3px 10px;
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.8em;
    position: relative;
    box-shadow: 0 2px 8px rgba(8, 145, 178, 0.25);
    height: 26px;
    display: flex;
    align-items: center;
}

.nav-one-bubble::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 8px;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid var(--primary);
}

.nav-chat-text {
    color: var(--primary) !important;
}

.logo-box {
    color: var(--cta) !important;
}

.logo-chinese {
    color: var(--primary) !important;
}

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

.nav-link {
    color: var(--text-body) !important;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.25s ease;
    position: relative;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.nav-link:hover {
    color: var(--primary) !important;
    background: rgba(8, 145, 178, 0.06);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 16px;
    right: 16px;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
    border-radius: 1px;
}

.nav-link:hover::after {
    width: calc(100% - 32px);
}

/* ============================================
   Hero Section - Gradient Mesh Background
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    overflow: visible;
    padding-top: 100px;
    padding-bottom: 40px;
    z-index: 1;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(160deg, #F0FDFA 0%, #E0F7FA 25%, #F8FFFE 50%, #ECFDF5 75%, #F0F9FF 100%);
}

.gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse 600px 400px at 20% 30%, rgba(8, 145, 178, 0.08) 0%, transparent 70%),
        radial-gradient(ellipse 500px 350px at 80% 60%, rgba(34, 211, 238, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 400px 300px at 50% 80%, rgba(34, 197, 94, 0.05) 0%, transparent 70%);
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(2px 2px at 20px 30px, rgba(8, 145, 178, 0.2), transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(34, 197, 94, 0.15), transparent),
        radial-gradient(1.5px 1.5px at 90px 40px, rgba(34, 211, 238, 0.2), transparent),
        radial-gradient(1.5px 1.5px at 130px 80px, rgba(8, 145, 178, 0.12), transparent),
        radial-gradient(2px 2px at 160px 30px, rgba(34, 197, 94, 0.15), transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: particles 30s linear infinite;
    opacity: 0.5;
}

@keyframes particles {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(-200px, -100px);
    }
}

.hero-title {
    margin-bottom: 24px;
}

.title-main {
    display: block;
    font-family: 'Poppins', sans-serif;
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 8px;

    line-height: 1.15;
    background: linear-gradient(to right,
            var(--primary-dark) 0%,
            var(--primary) 20%,
            #fff 50%,
            var(--primary) 80%,
            var(--primary-dark) 100%);
    background-size: 200% auto;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    animation: fadeInUp 1s ease-out forwards, gradientFlow 3s linear infinite;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes gradientFlow {
    to {
        background-position: 200% center;
    }
}

.title-sub {
    display: block;
    font-family: 'Poppins', sans-serif;
    font-size: 1.4rem;
    font-weight: 400;
    color: var(--text-muted);
    margin-top: 8px;
}

h1 .title-sub {
    font-size: 1.25rem;
    line-height: 1.5;
    margin-top: 16px;
    background: linear-gradient(90deg, var(--text-body), var(--text-muted));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

p.title-sub {
    font-size: 1.05rem;
    line-height: 1.6;
    margin-top: 12px;
    padding-left: 16px;
    border-left: 3px solid var(--primary-light);
    background: linear-gradient(to right, rgba(34, 211, 238, 0.1), transparent);
    padding-top: 4px;
    padding-bottom: 4px;
    border-radius: 0 8px 8px 0;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 36px;
    line-height: 1.8;
    letter-spacing: 0.3px;
}

/* New Logo Subtitle */
.logo-sub {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
    margin-left: 8px;
    padding-left: 8px;
    border-left: 1px solid var(--border-light);
    line-height: 1.2;
    display: flex;
    align-items: center;
}

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

/* ============================================
   Buttons - Pill Style
   ============================================ */
.btn {
    padding: 14px 32px;
    border: none;
    border-radius: 50px;
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s ease;
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 8px 24px rgba(8, 145, 178, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(8, 145, 178, 0.4);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--primary);
    border: 1.5px solid var(--border-light);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    background: rgba(8, 145, 178, 0.06);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   Software Demo Section - Glass Frame
   ============================================ */
.software-demo {
    margin-top: 48px;
    width: 100%;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 20px;
}

.demo-container {
    position: relative;
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur));
    -webkit-backdrop-filter: blur(var(--blur));
    border-radius: var(--radius-xl);
    padding: 20px;
    border: 1px solid var(--border-glass);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
}

.demo-frame {
    background: #FAFFFE;
    border-radius: var(--radius-lg);
    overflow: visible;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-light);
    width: 1120px;
    margin: 0 auto;
}

.demo-titlebar {
    background: linear-gradient(135deg, #F0FDFA, #E0F7FA);
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    border-bottom: 1px solid var(--border-light);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    position: relative;
    z-index: 10;
    width: 100%;
    box-sizing: border-box;
}

.titlebar-buttons {
    display: flex;
    gap: 8px;
}

.titlebar-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-close {
    background: #F87171;
    box-shadow: 0 0 6px rgba(248, 113, 113, 0.3);
}

.btn-minimize {
    background: #FBBF24;
    box-shadow: 0 0 6px rgba(251, 191, 36, 0.3);
}

.btn-maximize {
    background: #34D399;
    box-shadow: 0 0 6px rgba(52, 211, 153, 0.3);
}

.titlebar-buttons span:hover {
    transform: scale(1.15);
}

.titlebar-title {
    color: var(--primary);
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    font-size: 14px;
    line-height: 48px;
    flex: 1;
    text-align: center;
}

.demo-content {
    position: relative;
    background: #F8FFFE;
    height: 630px;
    width: 1120px;
    display: block;
    overflow: visible;
    padding: 0;
    margin: 0;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.demo-gif {
    width: 1120px;
    height: 630px;
    object-fit: cover;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    transition: all 0.3s ease;
    display: block;
}

.demo-overlay-effects {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: none;
}

.typing-indicator {
    position: absolute;
    bottom: 30px;
    left: 30px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid var(--border-light);
    border-radius: 20px;
    padding: 10px 15px;
    display: flex;
    gap: 5px;
    align-items: center;
    backdrop-filter: blur(10px);
}

.typing-indicator span {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out;
}

.typing-indicator span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typing {

    0%,
    80%,
    100% {
        transform: scale(0.8);
        opacity: 0.4;
    }

    40% {
        transform: scale(1);
        opacity: 1;
    }
}

.translation-popup {
    position: absolute;
    top: 30px;
    right: 30px;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(34, 197, 94, 0.2);
    border-radius: var(--radius-md);
    padding: 12px 18px;
    backdrop-filter: blur(10px);
    animation: pulse 2s infinite;
}

.popup-content {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--cta-dark);
    font-size: 14px;
    font-weight: 500;
}

.popup-content i {
    font-size: 16px;
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.85;
    }

    50% {
        transform: scale(1.03);
        opacity: 1;
    }
}

.ai-assistant {
    position: absolute;
    bottom: 30px;
    right: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255, 255, 255, 0.85);
    border: 1px solid rgba(8, 145, 178, 0.15);
    border-radius: 25px;
    padding: 10px 15px;
    backdrop-filter: blur(10px);
}

.ai-avatar {
    width: 30px;
    height: 30px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 14px;
}

.ai-message {
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
}

/* Feature Highlight Tabs */
.demo-features {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.feature-highlight {
    background: var(--bg-glass);
    border: 1px solid var(--border-light);
    border-radius: 12px;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.25s ease;
    color: var(--text-muted);
    font-weight: 500;
    min-width: 130px;
    justify-content: center;
    backdrop-filter: blur(8px);
}

.feature-highlight:hover,
.feature-highlight.active {
    background: rgba(8, 145, 178, 0.08);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(8, 145, 178, 0.12);
}

.feature-highlight i {
    font-size: 16px;
    transition: all 0.25s ease;
}

.feature-highlight:hover i,
.feature-highlight.active i {
    transform: scale(1.1);
}

.feature-highlight span {
    font-size: 13px;
    white-space: nowrap;
}

/* ============================================
   Section Titles
   ============================================ */
.section-title {
    font-family: 'Poppins', sans-serif;
    font-size: 2.8rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 56px;
    color: var(--text-heading);
}

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

/* ============================================
   Features Section - Alternating Layout
   ============================================ */
.features {
    padding: 40px 0 60px 0;
    background: var(--bg-body);
    position: relative;
    z-index: 2;
}

.feature-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(var(--blur));
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(8, 145, 178, 0.04), transparent);
    transition: left 0.5s ease;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-6px);
    border-color: rgba(8, 145, 178, 0.25);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: white;
    box-shadow: 0 8px 24px rgba(8, 145, 178, 0.2);
}

.feature-card h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-heading);
}

.feature-card p {
    color: var(--text-muted);
    line-height: 1.7;
}

/* Feature Showcase - Alternating image/text */
.feature-showcase {
    display: flex;
    align-items: center;
    gap: 72px;
    margin-bottom: 80px;
    padding: 40px 0;
}

.feature-showcase.reverse {
    flex-direction: row-reverse !important;
}

.feature-image {
    flex: 1;
    max-width: 620px;
}

.feature-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
    border: 1px solid var(--border-light);
}

.feature-image img:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-xl);
}

.feature-content {
    flex: 1;
    max-width: 500px;
}

.feature-title-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.feature-content .feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0;
    margin-left: 0;
    margin-right: 0;
    flex-shrink: 0;
}

.feature-content .feature-icon i {
    font-size: 22px;
    color: white;
}

.feature-content h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    margin-bottom: 0;
    color: var(--text-heading);
    background: none;
    -webkit-text-fill-color: var(--text-heading);
}

.feature-content p {
    color: var(--text-body);
    line-height: 1.8;
    font-size: 1.05rem;
    margin-bottom: 24px;
}

.feature-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-list li {
    color: var(--text-body);
    padding: 8px 0;
    position: relative;
    padding-left: 28px;
    font-size: 0.95rem;
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    background: rgba(8, 145, 178, 0.1);
    border-radius: 50%;
    border: 2px solid var(--primary);
}

.feature-list li::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
    width: 5px;
    height: 9px;
    border-bottom: 2px solid var(--primary);
    border-right: 2px solid var(--primary);
}

/* ============================================
   Demo Section
   ============================================ */
.demo {
    padding: 100px 0;
    background: var(--bg-section-alt);
}

.demo-header {
    text-align: center;
    margin-bottom: 56px;
}

.demo-header h2,
.demo-header h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.demo-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    line-height: 1.7;
    max-width: 700px;
    margin: 0 auto;
}

.demo .demo-content {
    display: flex;
    justify-content: center;
    align-items: center;
    height: auto;
    width: auto;
    background: transparent;
    border-radius: 0;
}

.demo-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
}

.demo-image img {
    width: 100%;
    height: auto;
    display: block;
}

.demo-overlay {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.demo-feature {
    background: rgba(255, 255, 255, 0.85);
    padding: 10px 18px;
    border-radius: 25px;
    border: 1px solid var(--border-light);
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.25s ease;
    backdrop-filter: blur(8px);
}

.demo-feature.active,
.demo-feature:hover {
    background: rgba(8, 145, 178, 0.1);
    border-color: var(--primary);
    box-shadow: 0 4px 16px rgba(8, 145, 178, 0.15);
}

.demo-description h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-heading);
}

.demo-description p {
    font-size: 1.05rem;
    color: var(--text-body);
    line-height: 1.8;
}

/* ============================================
   Use Cases Section - Glass Cards
   ============================================ */
.use-cases {
    padding: 100px 0;
    background: var(--bg-body);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.case-item {
    text-align: center;
    padding: 36px 24px;
    border-radius: var(--radius-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-light);
    transition: all 0.3s ease;
    backdrop-filter: blur(var(--blur));
    cursor: pointer;
}

.case-item:hover {
    transform: translateY(-6px);
    border-color: rgba(8, 145, 178, 0.25);
    box-shadow: var(--shadow-lg);
}

.case-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(8, 145, 178, 0.1), rgba(34, 211, 238, 0.08));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--primary);
}

.case-icon i {
    font-size: 1.5rem;
}

.case-item h4 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-heading);
}

.case-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ============================================
   Download / CTA Section
   ============================================ */
.download {
    padding: 100px 0;
    background: linear-gradient(160deg, #E0F7FA 0%, #F0FDFA 50%, #ECFDF5 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse 500px 400px at 30% 50%, rgba(8, 145, 178, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 400px 300px at 70% 50%, rgba(34, 197, 94, 0.04) 0%, transparent 70%);
}

.download .container {
    position: relative;
    z-index: 1;
}

.download .section-title {
    -webkit-text-fill-color: transparent;
}

.download-subtitle {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    line-height: 1.7;
}

.download-subtitle:last-of-type {
    margin-bottom: 48px;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.download-btn {
    background: var(--bg-glass);
    border: 1.5px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: 24px 32px;
    color: var(--text-heading);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    min-width: 150px;
    backdrop-filter: blur(8px);
}

.download-btn:hover {
    border-color: var(--primary);
    background: rgba(8, 145, 178, 0.06);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.download-btn i {
    font-size: 2rem;
    color: var(--primary);
}

.download-btn span {
    font-weight: 600;
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: #F0FDFA;
    border-top: 1px solid var(--border-light);
    padding: 56px 0 32px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-logo .logo-text {
    font-family: 'Poppins', sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-heading);
}

.footer-section h4 {
    font-family: 'Poppins', sans-serif;
    color: var(--text-heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-section p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-top: 8px;
}

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

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

.footer-section ul li a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.25s ease;
    font-size: 0.95rem;
}

.footer-section ul li a:hover {
    color: var(--primary);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.social-link {
    color: var(--text-muted);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: all 0.25s ease;
    font-size: 0.95rem;
}

.social-link:hover {
    color: var(--primary);
    transform: translateX(4px);
}

.social-link i {
    width: 20px;
    text-align: center;
    color: var(--primary);
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .navbar {
        top: 8px;
        width: calc(100% - 24px);
        border-radius: 12px;
    }

    .title-main {
        font-size: 2.4rem;
    }

    .title-sub {
        font-size: 1.1rem;
    }

    .hero {
        padding-top: 80px;
    }

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

    .demo-header h3 {
        font-size: 1.8rem;
    }

    .demo-header p {
        font-size: 1rem;
        padding: 0 16px;
    }

    .demo .demo-content {
        flex-direction: column;
        text-align: center;
    }

    .nav-menu {
        display: none;
    }

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

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

    /* Software Demo Responsive */
    .software-demo {
        margin-top: 40px;
    }

    .demo-container {
        padding: 16px;
    }

    .demo-frame {
        width: 100%;
    }

    .demo-content {
        width: 100%;
        height: auto;
        min-height: 250px;
    }

    .demo-gif {
        width: 100%;
        height: auto;
        max-height: 300px;
    }

    .demo-features {
        gap: 8px;
    }

    .feature-highlight {
        min-width: auto;
        padding: 8px 12px;
        font-size: 12px;
    }

    .feature-highlight i {
        font-size: 14px;
    }

    .feature-showcase {
        flex-direction: column;
        gap: 32px;
        margin-bottom: 48px;
        padding: 20px 0;
    }

    .feature-showcase.reverse {
        flex-direction: column;
    }

    .feature-content h3 {
        font-size: 1.4rem;
    }

    .feature-content p {
        font-size: 0.95rem;
    }

    .typing-indicator,
    .translation-popup,
    .ai-assistant {
        position: relative;
        margin: 10px;
        display: inline-flex;
    }

    .demo-overlay-effects {
        position: static;
        display: flex;
        justify-content: space-around;
        align-items: center;
        padding: 16px;
        background: rgba(240, 253, 250, 0.9);
        margin-top: 8px;
        border-radius: var(--radius-sm);
    }

    .cases-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .case-item {
        padding: 24px 16px;
    }
}

@media (max-width: 480px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}