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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.4;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 添加全局變量 */
:root {
    --primary-color: #0078d4;
    --secondary-color: #106ebe;
    --accent-color: #ff6b6b;
    --text-primary: #333;
    --text-secondary: #666;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-bg: rgba(255, 255, 255, 0.95);
    --shadow-light: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 8px 40px rgba(0, 0, 0, 0.15);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* M365 Ribbon Section */
.m365-ribbon-section {
    padding: 40px 20px;
    background: var(--bg-gradient);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.m365-ribbon-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 70%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.ribbon-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.m365-ribbon-large {
    position: relative;
    display: inline-block;
    transform: scale(1.5);
}

.ribbon-body-large {
    width: 200px;
    height: 120px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    border-radius: 30px;
    position: relative;
    transform: rotate(-5deg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.ribbon-body-large::before {
    content: '';
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 25px solid transparent;
    border-right: 25px solid transparent;
    border-bottom: 25px solid #ff6b6b;
}

.ribbon-body-large::after {
    content: '';
    position: absolute;
    top: 20px;
    left: 20px;
    right: 20px;
    bottom: 20px;
    background: linear-gradient(135deg, rgba(255,255,255,0.3), transparent);
    border-radius: 20px;
}

.ribbon-tag-large {
    position: absolute;
    top: -25px;
    right: -15px;
    background: #333;
    color: white;
    padding: 8px 12px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: bold;
    transform: rotate(5deg);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

/* Hero Section */
.hero {
    padding: 60px 20px 40px;
    text-align: center;
    background: var(--bg-gradient);
    color: white;
    position: relative;
    overflow: hidden;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(255,255,255,0.05) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-20px) rotate(1deg); }
    66% { transform: translateY(10px) rotate(-1deg); }
}

.hero-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
}

/* Hero Main Icon */
.hero-main-icon {
    margin-bottom: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.copilot-icon {
    position: relative;
    width: 140px;
    height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-circle {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0078d4, #106ebe, #005a9e);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 15px 40px rgba(0, 120, 212, 0.4);
    border: 3px solid rgba(255, 255, 255, 0.3);
    position: relative;
    overflow: hidden;
    animation: pulse 3s ease-in-out infinite;
}

.icon-circle::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.2) 50%, transparent 70%);
    animation: shine 4s ease-in-out infinite;
}

.icon-inner {
    color: white;
    z-index: 2;
    position: relative;
}

.icon-inner svg {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

@keyframes pulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 0 15px 40px rgba(0, 120, 212, 0.4);
    }
    50% { 
        transform: scale(1.05);
        box-shadow: 0 20px 50px rgba(0, 120, 212, 0.6);
    }
}

@keyframes shine {
    0%, 100% { transform: translateX(-100%) rotate(45deg); }
    50% { transform: translateX(100%) rotate(45deg); }
}

.m365-ribbon {
    position: relative;
    display: inline-block;
}

.ribbon-body {
    width: 120px;
    height: 80px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    border-radius: 20px;
    position: relative;
    transform: rotate(-5deg);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.ribbon-body::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-bottom: 15px solid #ff6b6b;
}

.ribbon-body::after {
    content: '';
    position: absolute;
    top: 10px;
    left: 10px;
    right: 10px;
    bottom: 10px;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    border-radius: 15px;
}

.ribbon-tag {
    position: absolute;
    top: -15px;
    right: -10px;
    background: #333;
    color: white;
    padding: 4px 8px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: bold;
    transform: rotate(5deg);
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 32px;
    opacity: 0.9;
    line-height: 1.5;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 14px 28px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-width: 160px;
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.8);
    padding: 12px 26px;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    min-width: 160px;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: white;
    color: var(--text-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-light);
}

.trial-text {
    font-size: 0.9rem;
    opacity: 0.8;
    text-decoration: underline;
    cursor: pointer;
}

/* Visual Transition */
.visual-transition {
    padding: 60px 20px;
    background: linear-gradient(90deg, #667eea, #764ba2, #f093fb);
    position: relative;
}

.transition-illustration {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    height: 100px;
}

.flow-line {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, rgba(255,255,255,0.3), rgba(255,255,255,0.8), rgba(255,255,255,0.3));
    border-radius: 2px;
    transform: translateY(-50%);
}

.app-icons {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.app-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: white;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: white;
    font-size: 18px;
}

.app-icon.word { 
    background: #2b579a; 
}
.app-icon.word::before { content: 'W'; }

.app-icon.excel { 
    background: #217346; 
}
.app-icon.excel::before { content: 'X'; }

.app-icon.powerpoint { 
    background: #d24726; 
}
.app-icon.powerpoint::before { content: 'P'; }

.app-icon.outlook { 
    background: #0072c6; 
}
.app-icon.outlook::before { content: 'O'; }

/* Features Section */
.features {
    padding: 60px 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, transparent, rgba(255,255,255,0.8));
    z-index: 1;
}

.feature-container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    position: relative;
    z-index: 2;
}

.feature-item {
    text-align: left;
    padding: 32px 24px;
    border-radius: var(--border-radius);
    background: var(--card-bg);
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.feature-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.feature-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-heavy);
}

.feature-icon {
    margin-bottom: 24px;
    position: relative;
    height: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 120px;
    max-height: 200px;
    overflow: hidden;
    padding: 10px;
}

.feature-icon img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 8px;
}

/* Feature Icons - Desktop Illustration */
.desktop-illustration {
    position: relative;
    width: 100%;
    height: auto;
    min-height: 120px;
    max-height: 180px;
    background: #f8f9fa;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid #e9ecef;
    overflow: hidden;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.screen {
    width: calc(100% - 30px);
    height: calc(100% - 30px);
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 8px;
    position: relative;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.3);
    margin: 15px;
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

.document-elements {
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    bottom: 12px;
}

.element {
    height: 6px;
    background: rgba(255, 255, 255, 0.9);
    margin-bottom: 8px;
    border-radius: 3px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.element:nth-child(1) { width: 85%; }
.element:nth-child(2) { width: 65%; }
.element:nth-child(3) { width: 95%; }

.element:nth-child(4) { 
    width: 45%; 
    height: 4px;
    margin-top: 12px;
}

/* Feature Icons - Overlapping Rectangles */
.overlapping-rectangles {
    position: relative;
    width: 100%;
    height: auto;
    min-height: 120px;
    max-height: 180px;
    background: #f8f9fa;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid #e9ecef;
    overflow: hidden;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.rect-large {
    width: 60px;
    height: 40px;
    background: linear-gradient(135deg, #0078d4, #106ebe);
    border-radius: 8px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 4px 15px rgba(0, 120, 212, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

.rect-small {
    width: 45px;
    height: 30px;
    background: linear-gradient(135deg, #106ebe, #005a9e);
    border-radius: 6px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) translateX(12px) translateY(6px);
    box-shadow: 0 3px 12px rgba(16, 110, 190, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

/* Feature Icons - Plus Circle with Documents */
.plus-circle {
    width: 100%;
    height: auto;
    min-height: 120px;
    max-height: 180px;
    background: linear-gradient(135deg, #0078d4, #106ebe);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
    box-shadow: var(--shadow-light);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 20px;
    overflow: hidden;
    padding: 15px;
}

.plus-sign {
    color: white;
    font-size: 28px;
    font-weight: bold;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.documents-stack {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
}

.doc {
    width: 45px;
    height: 30px;
    background: linear-gradient(135deg, #fff, #f8f9fa);
    border: 1px solid #e9ecef;
    border-radius: 6px;
    position: absolute;
    box-shadow: 0 3px 12px rgba(0, 0, 0, 0.15);
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

.doc1 { transform: rotate(-8deg) translateY(0); }
.doc2 { transform: rotate(3deg) translateY(-6px); }
.doc3 { transform: rotate(-3deg) translateY(-12px); }

/* Feature Icons - Folder with Content Stacks */
.folder-icon {
    position: relative;
    width: 100%;
    height: auto;
    min-height: 120px;
    max-height: 180px;
    background: #f8f9fa;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid #e9ecef;
    overflow: hidden;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.folder-body {
    width: calc(100% - 30px);
    height: calc(100% - 30px);
    background: linear-gradient(135deg, #0078d4, #106ebe);
    border-radius: 8px;
    position: relative;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.2);
    margin: 15px;
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

.folder-tab {
    width: 40px;
    height: 18px;
    background: linear-gradient(135deg, #106ebe, #005a9e);
    border-radius: 8px 8px 0 0;
    position: absolute;
    top: -18px;
    left: 12px;
    box-shadow: 0 2px 8px rgba(16, 110, 190, 0.3);
}

.content-stacks {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    gap: 10px;
}

.stack {
    width: 25px;
    height: 35px;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.stack.orange { 
    background: linear-gradient(135deg, #ff9500, #ff8000);
}
.stack.purple { 
    background: linear-gradient(135deg, #af52de, #9c27b0);
}
.stack.blue { 
    background: linear-gradient(135deg, #0078d4, #106ebe);
}

/* Feature Icons - Cloud with Collaboration */
.cloud-icon {
    position: relative;
    width: 100%;
    height: auto;
    min-height: 120px;
    max-height: 180px;
    background: #f8f9fa;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid #e9ecef;
    overflow: hidden;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.cloud-body {
    width: calc(100% - 30px);
    height: calc(100% - 30px);
    background: linear-gradient(135deg, #0078d4, #106ebe);
    border-radius: 30px;
    position: relative;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.2);
    margin: 15px;
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

.cloud-body::before {
    content: '';
    position: absolute;
    top: -12px;
    left: 25px;
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, #0078d4, #106ebe);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 120, 212, 0.3);
}

.cloud-body::after {
    content: '';
    position: absolute;
    top: -8px;
    right: 20px;
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, #0078d4, #106ebe);
    border-radius: 50%;
    box-shadow: 0 2px 6px rgba(0, 120, 212, 0.3);
}

.collaboration-screens {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    gap: 12px;
}

.screen-profile, .screen-files {
    width: 25px;
    height: 18px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 4px;
    border: 1px solid #dee2e6;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

/* Feature Icons - Location Pin with Continuity */
.location-pin {
    position: relative;
    width: 100%;
    height: auto;
    min-height: 120px;
    max-height: 180px;
    background: #f8f9fa;
    border-radius: 16px;
    box-shadow: var(--shadow-light);
    border: 1px solid #e9ecef;
    overflow: hidden;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px;
}

.pin-body {
    width: 18px;
    height: 25px;
    background: linear-gradient(135deg, #0078d4, #106ebe);
    border-radius: 9px 9px 0 0;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 3px 12px rgba(0, 120, 212, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.3);
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

.pin-point {
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 10px solid #0078d4;
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    filter: drop-shadow(0 2px 4px rgba(0, 120, 212, 0.3));
}

.continuity-illustration {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    align-items: center;
    gap: 10px;
}

.profile-pic {
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, #0078d4, #106ebe);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 120, 212, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.3);
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

.chat-bubble {
    width: 22px;
    height: 13px;
    background: linear-gradient(135deg, #f8f9fa, #e9ecef);
    border-radius: 7px;
    position: relative;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    border: 1px solid #dee2e6;
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

.chat-bubble::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 6px;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid #e9ecef;
}

.doc-preview {
    width: 18px;
    height: 13px;
    background: linear-gradient(135deg, #fff, #f8f9fa);
    border: 1px solid #dee2e6;
    border-radius: 3px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    max-width: calc(100% - 30px);
    max-height: calc(100% - 30px);
}

.feature-title {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
    line-height: 1.3;
}

.feature-description {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* More Applications Section */
.more-apps {
    padding: 60px 20px;
    background: var(--bg-gradient);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.more-apps::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 30% 70%, rgba(255,255,255,0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.more-apps-container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.more-apps-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 16px;
    background: linear-gradient(45deg, #fff, #f0f0f0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.more-apps-description {
    font-size: 1rem;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.app-icons-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    align-items: center;
}

.app-icon-large {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: white;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    position: relative;
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: white;
    font-size: 24px;
    font-family: 'Segoe UI', Arial, sans-serif;
}

.app-icon-large:hover {
    transform: scale(1.1);
}

.app-icon-large.word { 
    background: #2b579a; 
}
.app-icon-large.word::before { 
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M14,2H6A2,2 0 0,0 4,4V20A2,2 0 0,0 6,22H18A2,2 0 0,0 20,20V8L14,2M18,20H6V4H13V9H18V20Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.app-icon-large.excel { 
    background: #217346; 
}
.app-icon-large.excel::before { 
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M14,2H6A2,2 0 0,0 4,4V20A2,2 0 0,0 6,22H18A2,2 0 0,0 20,20V8L14,2M18,20H6V4H13V9H18V20Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.app-icon-large.powerpoint { 
    background: #d24726; 
}
.app-icon-large.powerpoint::before { 
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M14,2H6A2,2 0 0,0 4,4V20A2,2 0 0,0 6,22H18A2,2 0 0,0 20,20V8L14,2M18,20H6V4H13V9H18V20Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.app-icon-large.outlook { 
    background: #0072c6; 
}
.app-icon-large.outlook::before { 
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M20,4H4C2.89,4 2,4.89 2,6V18C2,19.11 2.89,20 4,20H20C21.11,20 22,19.11 22,18V6C22,4.89 21.11,4 20,4M20,8L12,13L4,8V6L12,11L20,6V8Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.app-icon-large.teams { 
    background: #6264a7; 
}
.app-icon-large.teams::before { 
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10,10 0 0,0 12,2M8,7H10.5C11.88,7 13,8.12 13,9.5C13,10.88 11.88,12 10.5,12H8V7M8,13H10.5C11.88,13 13,14.12 13,15.5C13,16.88 11.88,18 10.5,18H8V13M16,7H18V18H16V7Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.app-icon-large.onenote { 
    background: #7719aa; 
}
.app-icon-large.onenote::before { 
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M14,2H6A2,2 0 0,0 4,4V20A2,2 0 0,0 6,22H18A2,2 0 0,0 20,20V8L14,2M18,20H6V4H13V9H18V20Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.app-icon-large.sharepoint { 
    background: #0078d4; 
}
.app-icon-large.sharepoint::before { 
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M12,2L4,5V11.09C4,16.14 7.41,20.85 12,22C16.59,20.85 20,16.14 20,11.09V5L12,2M12,4.18L18,6.5V11.09C18,14.28 16.36,17.29 13.53,19.07L12,20.07L10.47,19.07C7.64,17.29 6,14.28 6,11.09V6.5L12,4.18Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.m365-center {
    background: transparent !important;
    box-shadow: none !important;
}

.m365-ribbon-small {
    position: relative;
    width: 100%;
    height: 100%;
}

.ribbon-body-small {
    width: 50px;
    height: 35px;
    background: linear-gradient(45deg, #ff6b6b, #4ecdc4, #45b7d1, #96ceb4);
    border-radius: 8px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-5deg);
}

.ribbon-tag-small {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #333;
    color: white;
    padding: 2px 4px;
    border-radius: 4px;
    font-size: 8px;
    font-weight: bold;
    transform: rotate(5deg);
}

.app-tabs {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 32px;
}

.tab-btn {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 10px 20px;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.tab-btn.active,
.tab-btn:hover {
    background: white;
    color: var(--text-primary);
    border-color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-light);
}

/* Mobile App Section */
.mobile-app {
    padding: 60px 20px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    text-align: center;
    position: relative;
}

.mobile-app::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.8), transparent);
}

.mobile-app-container {
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.mobile-app-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--text-primary);
    line-height: 1.3;
}

.app-store-badges {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    max-width: 500px;
    margin: 0 auto;
}

.app-store-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 24px;
    background: #333;
    color: white;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.3s ease;
    min-width: 200px;
}

.app-store-badge:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
}

.badge-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.badge-icon.apple::before { 
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M18.71,19.5C17.88,20.74 17,21.95 15.66,21.97C14.32,22 13.89,21.18 12.37,21.18C10.84,21.18 10.37,21.95 9.1,22C7.79,22.05 6.8,20.68 5.96,19.47C4.25,17 2.94,12.45 4.7,9.39C5.57,7.87 7.13,6.91 8.82,6.88C10.1,6.86 11.32,7.75 12.11,7.75C12.89,7.75 14.37,6.68 15.92,6.84C16.57,6.87 18.39,7.1 19.56,8.82C19.47,8.88 17.39,10.1 17.41,12.63C17.44,15.65 20.06,16.66 20.09,16.67C20.06,16.74 19.67,18.11 18.71,19.5M13,3.5C13.73,2.67 14.94,2.04 15.94,2C16.07,3.17 15.6,4.35 14.9,5.19C14.21,6.04 13.07,6.7 11.95,6.61C11.8,5.46 12.36,4.26 13,3.5Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.badge-icon.google::before { 
    content: '';
    width: 24px;
    height: 24px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23000'%3E%3Cpath d='M3,20.5V3.5C3,2.91 3.34,2.39 3.84,2.15L13.69,12L3.84,21.85C3.34,21.61 3,21.09 3,20.5M16.81,15.12L6.05,21.34L14.54,12.85L16.81,15.12M20.16,10.81C20.5,11.08 20.75,11.5 20.75,12C20.75,12.5 20.53,12.9 20.18,13.18L17.89,14.5L15.39,12L17.89,9.5L20.16,10.81M6.05,2.66L16.81,8.88L14.54,11.15L6.05,2.66Z'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.badge-text {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.download-text {
    font-size: 0.8rem;
    opacity: 0.8;
}

.store-name {
    font-size: 1.1rem;
    font-weight: 600;
}

/* Footer */
.footer {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    padding: 50px 20px 30px;
    text-align: center;
    color: white;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.1), transparent);
}

.footer-container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.qr-code {
    margin-bottom: 30px;
}

.qr-pattern {
    width: 120px;
    height: 120px;
    background: white;
    margin: 0 auto;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    border: 2px solid #333;
    display: grid;
    grid-template-columns: repeat(25, 1fr);
    grid-template-rows: repeat(25, 1fr);
    gap: 0;
}

.qr-pattern::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 25% 25%, #333 2px, transparent 2px),
        radial-gradient(circle at 75% 25%, #333 2px, transparent 2px),
        radial-gradient(circle at 25% 75%, #333 2px, transparent 2px),
        radial-gradient(circle at 50% 50%, #333 1px, transparent 1px),
        radial-gradient(circle at 20% 50%, #333 1px, transparent 1px),
        radial-gradient(circle at 80% 50%, #333 1px, transparent 1px),
        radial-gradient(circle at 50% 20%, #333 1px, transparent 1px),
        radial-gradient(circle at 50% 80%, #333 1px, transparent 1px),
        radial-gradient(circle at 35% 35%, #333 1px, transparent 1px),
        radial-gradient(circle at 65% 65%, #333 1px, transparent 1px),
        radial-gradient(circle at 35% 65%, #333 1px, transparent 1px),
        radial-gradient(circle at 65% 35%, #333 1px, transparent 1px);
    background-size: 
        100px 100px,
        100px 100px,
        100px 100px,
        20px 20px,
        20px 20px,
        20px 20px,
        20px 20px,
        20px 20px,
        15px 15px,
        15px 15px,
        15px 15px,
        15px 15px;
    background-position: 
        10px 10px,
        10px 10px,
        10px 10px,
        50% 50%,
        20% 50%,
        80% 50%,
        50% 20%,
        50% 80%,
        35% 35%,
        65% 65%,
        35% 65%,
        65% 35%;
}

.footer-text {
    margin-bottom: 40px;
}

.footer-text p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid #ddd;
    flex-wrap: wrap;
    gap: 20px;
}

.copyright {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: #666;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.social-icon::before {
    content: '';
    width: 16px;
    height: 16px;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}

.social-icon.linkedin::before { 
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M19,3A2,2 0 0,1 21,5V19A2,2 0 0,1 19,21H5A2,2 0 0,1 3,19V5A2,2 0 0,1 5,3H19M18.5,18.5V13.2A3.26,3.26 0 0,0 15.24,9.94C14.39,9.94 13.4,10.46 12.92,11.24V10.13H10.13V18.5H12.92V13.57C12.92,12.8 13.54,12.17 14.31,12.17A1.4,1.4 0 0,1 15.71,13.57V18.5H18.5M6.88,8.56A1.68,1.68 0 0,0 8.56,6.88C8.56,5.95 7.81,5.19 6.88,5.19A1.69,1.69 0 0,0 5.19,6.88C5.19,7.81 5.95,8.56 6.88,8.56M8.27,18.5V10.13H5.5V18.5H8.27Z'/%3E%3C/svg%3E");
}

.social-icon.facebook::before { 
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M12,2.04C6.5,2.04 2,6.53 2,12.06C2,17.06 5.66,21.21 10.44,21.96V14.96H7.9V12.06H10.44V9.85C10.44,7.34 11.93,5.96 14.22,5.96C15.31,5.96 16.45,6.15 16.45,6.15V8.62H15.19C13.95,8.62 13.56,9.39 13.56,10.18V12.06H16.34L15.89,14.96H13.56V21.96A10,10 0 0,0 22,12.06C22,6.53 17.5,2.04 12,2.04Z'/%3E%3C/svg%3E");
}

.social-icon.twitter::before { 
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M22.46,6C21.69,6.35 20.86,6.58 20,6.69C20.88,6.16 21.56,5.32 21.88,4.31C21.05,4.81 20.13,5.16 19.16,5.36C18.37,4.5 17.26,4 16,4C13.65,4 11.73,5.92 11.73,8.29C11.73,8.63 11.77,8.96 11.84,9.27C8.28,9.09 5.11,7.38 3,4.79C2.63,5.42 2.42,6.16 2.42,6.94C2.42,8.43 3.17,9.75 4.33,10.5C3.62,10.5 2.96,10.3 2.38,10C2.38,10 2.38,10 2.38,10.03C2.38,12.11 3.86,13.85 5.82,14.24C5.46,14.34 5.08,14.39 4.69,14.39C4.42,14.39 4.15,14.36 3.89,14.31C4.43,16 6,17.26 7.89,17.29C6.43,18.45 4.58,19.13 2.56,19.13C2.22,19.13 1.88,19.11 1.54,19.07C3.44,20.29 5.7,21 8.12,21C16,21 20.33,14.46 20.33,8.79C20.33,8.6 20.33,8.42 20.32,8.23C21.16,7.63 21.88,6.87 22.46,6Z'/%3E%3C/svg%3E");
}

.social-icon.instagram::before { 
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M7.8,2H16.2C19.4,2 22,4.6 22,7.8V16.2A5.8,5.8 0 0,1 16.2,22H7.8C4.6,22 2,19.4 2,16.2V7.8A5.8,5.8 0 0,1 7.8,2M7.6,4A3.6,3.6 0 0,0 4,7.6V16.4C4,18.39 5.61,20 7.6,20H16.4A3.6,3.6 0 0,0 20,16.4V7.6C20,5.61 18.39,4 16.4,4H7.6M17.25,5.5A1.25,1.25 0 0,1 18.5,6.75A1.25,1.25 0 0,1 17.25,8A1.25,1.25 0 0,1 16,6.75A1.25,1.25 0 0,1 17.25,5.5M12,7A5,5 0 0,1 17,12A5,5 0 0,1 12,17A5,5 0 0,1 7,12A5,5 0 0,1 12,7M12,9A3,3 0 0,0 9,12A3,3 0 0,0 12,15A3,3 0 0,0 15,12A3,3 0 0,0 12,9Z'/%3E%3C/svg%3E");
}

.social-icon.youtube::before { 
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='white'%3E%3Cpath d='M10,15L15.19,12L10,9V15M21.56,7.17C21.69,7.64 21.78,8.27 21.84,9.07C21.91,9.87 21.94,10.56 21.94,11.16L22,12C22,14.19 21.84,15.8 21.56,16.83C21.31,17.73 20.73,18.31 19.83,18.56C19.36,18.69 18.5,18.78 17.18,18.84C15.88,18.91 14.69,18.94 13.59,18.94L12,19C7.81,19 4.69,18.84 2.64,18.56C1.74,18.31 1.16,17.73 0.91,16.83C0.78,16.36 0.69,15.73 0.63,14.93C0.56,14.13 0.53,13.44 0.53,12.84L0.47,12C0.47,9.81 0.63,8.2 0.91,7.17C1.16,6.27 1.74,5.69 2.64,5.44C3.11,5.31 3.97,5.22 5.29,5.16C6.59,5.09 7.78,5.06 8.88,5.06L10.47,5C14.66,5 17.78,5.16 19.83,5.44C20.73,5.69 21.31,6.27 21.56,7.17Z'/%3E%3C/svg%3E");
}

.social-icon:hover {
    transform: scale(1.1);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-content {
        text-align: center;
    }
    
    .feature-container {
        grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
        gap: 30px;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 40px 20px 30px;
        min-height: auto;
    }
    
    .copilot-icon {
        width: 120px;
        height: 120px;
    }
    
    .hero-main-icon {
        margin-bottom: 30px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .feature-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .feature-item {
        padding: 24px 20px;
    }
    
    .feature-icon {
        min-height: 100px;
        max-height: 150px;
    }
    
    .feature-icon img {
        max-width: calc(100% - 20px);
        max-height: calc(100% - 20px);
    }
    
    .desktop-illustration,
    .overlapping-rectangles,
    .plus-circle,
    .folder-icon,
    .cloud-icon,
    .location-pin {
        min-height: 100px;
        max-height: 150px;
    }
    
    .app-icons-row {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
    
    .app-store-badges {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 16px;
    }
    
    .more-apps-title {
        font-size: 1.8rem;
    }
    
    .mobile-app-title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .copilot-icon {
        width: 100px;
        height: 100px;
    }
    
    .hero-main-icon {
        margin-bottom: 25px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    
    .btn-primary,
    .btn-secondary {
        min-width: 200px;
        padding: 12px 20px;
    }
    
    .feature-item {
        padding: 20px 16px;
    }
    
    .feature-icon {
        min-height: 80px;
        max-height: 120px;
    }
    
    .feature-icon img {
        max-width: calc(100% - 16px);
        max-height: calc(100% - 16px);
    }
    
    .desktop-illustration,
    .overlapping-rectangles,
    .plus-circle,
    .folder-icon,
    .cloud-icon,
    .location-pin {
        min-height: 80px;
        max-height: 120px;
    }
    
    .feature-title {
        font-size: 1.2rem;
    }
    
    .app-tabs {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    
    .app-icons-row {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .more-apps-title {
        font-size: 1.5rem;
    }
    
    .mobile-app-title {
        font-size: 1.3rem;
    }
}