/* WPS Office Landing Page - Autumn Amber & Deep Slate Theme */
/* 原创设计，与其他WPS站点完全不同 */

:root {
    /* 主色调 - 暖琥珀+深石板 */
    --amber-50: #fffbeb;
    --amber-100: #fef3c7;
    --amber-200: #fde68a;
    --amber-300: #fcd34d;
    --amber-400: #fbbf24;
    --amber-500: #f59e0b;
    --amber-600: #d97706;
    --amber-700: #b45309;
    --amber-800: #92400e;
    
    --slate-50: #f8fafc;
    --slate-100: #f1f5f9;
    --slate-200: #e2e8f0;
    --slate-300: #cbd5e1;
    --slate-400: #94a3b8;
    --slate-500: #64748b;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
    
    --rose-500: #f43f5e;
    --emerald-500: #10b981;
    --blue-500: #3b82f6;
    
    --white: #ffffff;
    --black: #000000;
    
    /* 功能色 */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    
    /* 间距 */
    --section-padding: 100px;
    --container-max: 1200px;
    --container-padding: 24px;
    
    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.35s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--slate-700);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

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

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 8px;
    transition: all var(--transition-base);
}

.btn-icon {
    width: 18px;
    height: 18px;
}

.btn-primary {
    background: var(--amber-600);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--amber-700);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--slate-700);
    border: 1.5px solid var(--slate-300);
}

.btn-outline:hover {
    border-color: var(--amber-500);
    color: var(--amber-600);
}

.btn-white {
    background: var(--white);
    color: var(--amber-700);
}

.btn-white:hover {
    background: var(--amber-50);
    transform: translateY(-1px);
}

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* Section Header */
.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--amber-600);
    background: var(--amber-50);
    padding: 6px 14px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--slate-900);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 17px;
    color: var(--slate-500);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    padding: 12px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--slate-900);
}

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

.nav-link {
    display: block;
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: var(--slate-600);
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--amber-600);
    background: var(--amber-50);
}

.nav-link.active {
    color: var(--amber-700);
    background: var(--amber-100);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--slate-700);
    border-radius: 1px;
    transition: all var(--transition-base);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
}

.hero-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--amber-50) 0%, var(--slate-50) 50%, var(--amber-100) 100%);
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--amber-700);
    background: var(--white);
    padding: 8px 16px;
    border-radius: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--emerald-500);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

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

.hero-title {
    font-size: 52px;
    font-weight: 800;
    color: var(--slate-900);
    line-height: 1.15;
    margin-bottom: 24px;
}

.hero-title .highlight {
    color: var(--amber-600);
}

.hero-subtitle {
    font-size: 18px;
    color: var(--slate-600);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 520px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

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

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

.stat-number {
    font-size: 28px;
    font-weight: 800;
    color: var(--slate-900);
}

.stat-label {
    font-size: 13px;
    color: var(--slate-500);
    margin-top: 4px;
}

/* Hero Visual - App Showcase */
.hero-visual {
    display: flex;
    justify-content: center;
}

.app-showcase {
    position: relative;
    width: 400px;
    height: 400px;
}

.showcase-card {
    position: absolute;
    width: 160px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform var(--transition-slow);
}

.card-writer {
    top: 0;
    left: 0;
    transform: rotate(-5deg);
}

.card-sheets {
    top: 0;
    right: 0;
    transform: rotate(5deg);
}

.card-slides {
    bottom: 0;
    left: 40px;
    transform: rotate(3deg);
}

.card-pdf {
    bottom: 40px;
    right: 20px;
    transform: rotate(-3deg);
}

.showcase-card:hover {
    transform: rotate(0deg) scale(1.05);
    z-index: 10;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--slate-700);
    border-bottom: 1px solid var(--slate-100);
}

.card-header svg {
    width: 18px;
    height: 18px;
}

.card-body {
    padding: 16px;
}

.mock-line {
    height: 8px;
    background: var(--slate-200);
    border-radius: 4px;
    margin-bottom: 8px;
}

.mock-line.short {
    width: 60%;
}

.mock-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
}

.mock-cell {
    height: 20px;
    background: var(--slate-100);
    border-radius: 4px;
}

.mock-cell.fill {
    background: var(--amber-200);
}

.mock-slide {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 60px;
    background: linear-gradient(135deg, var(--amber-100), var(--amber-200));
    border-radius: 4px;
}

.mock-chart {
    width: 40px;
    height: 30px;
    background: var(--amber-400);
    border-radius: 2px;
    clip-path: polygon(0 100%, 25% 60%, 50% 80%, 75% 30%, 100% 50%, 100% 100%);
}

.mock-pdf {
    font-size: 12px;
    font-weight: 700;
    color: var(--rose-500);
    text-align: center;
    padding: 20px;
    border: 2px dashed var(--rose-300);
    border-radius: 4px;
}

/* Features Section */
.features {
    padding: var(--section-padding) 0;
    background: var(--white);
}

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

.feature-card {
    padding: 32px;
    background: var(--slate-50);
    border-radius: 16px;
    border: 1px solid var(--slate-100);
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: var(--white);
    border-color: var(--amber-200);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.icon-writer {
    background: var(--amber-100);
    color: var(--amber-600);
}

.icon-sheets {
    background: #dbeafe;
    color: var(--blue-500);
}

.icon-slides {
    background: #fce7f3;
    color: var(--rose-500);
}

.icon-pdf {
    background: #fee2e2;
    color: var(--error);
}

.icon-cloud {
    background: #d1fae5;
    color: var(--emerald-500);
}

.icon-ai {
    background: #e0e7ff;
    color: #6366f1;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: var(--slate-500);
    line-height: 1.7;
}

/* Deep Features */
.deep-features {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.deep-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 40px;
    background: var(--slate-50);
    border-radius: 20px;
}

.deep-row.reverse {
    direction: rtl;
}

.deep-row.reverse > * {
    direction: ltr;
}

.deep-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--amber-700);
    background: var(--amber-100);
    padding: 6px 12px;
    border-radius: 6px;
    margin-bottom: 16px;
}

.deep-tag-alt {
    color: var(--blue-500);
    background: #dbeafe;
}

.deep-content h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 16px;
}

.deep-content > p {
    font-size: 15px;
    color: var(--slate-600);
    line-height: 1.8;
    margin-bottom: 20px;
}

.deep-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.deep-list li {
    position: relative;
    padding-left: 20px;
    font-size: 14px;
    color: var(--slate-600);
}

.deep-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--amber-500);
    border-radius: 50%;
}

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

.visual-box {
    background: var(--white);
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

/* Suite Flow Visual */
.suite-flow {
    display: flex;
    align-items: center;
    gap: 16px;
}

.flow-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 20px;
    background: var(--slate-100);
    border-radius: 12px;
}

.flow-item svg {
    width: 32px;
    height: 32px;
    color: var(--amber-600);
}

.flow-item span {
    font-size: 12px;
    font-weight: 600;
    color: var(--slate-600);
}

.flow-arrow {
    font-size: 24px;
    color: var(--amber-400);
    font-weight: 700;
}

/* Cloud Box */
.cloud-box {
    text-align: center;
}

.cloud-icon {
    color: var(--blue-500);
}

.cloud-icon svg {
    width: 80px;
    height: 60px;
}

.sync-dots {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 16px;
}

.sync-dots .dot {
    width: 8px;
    height: 8px;
    background: var(--blue-400);
    border-radius: 50%;
    animation: syncBounce 1.4s infinite ease-in-out both;
}

.sync-dots .dot:nth-child(1) { animation-delay: -0.32s; }
.sync-dots .dot:nth-child(2) { animation-delay: -0.16s; }

@keyframes syncBounce {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.5; }
    40% { transform: scale(1); opacity: 1; }
}

/* AI Box */
.ai-brain {
    color: var(--slate-600);
}

.ai-brain svg {
    width: 80px;
    height: 80px;
}

/* Template Preview */
.template-preview {
    display: flex;
    gap: 12px;
}

.template-card {
    text-align: center;
}

.template-thumb {
    width: 60px;
    height: 80px;
    border-radius: 6px;
    margin-bottom: 8px;
}

.template-thumb.blue {
    background: linear-gradient(135deg, #3b82f6, #60a5fa);
}

.template-thumb.amber {
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
}

.template-thumb.rose {
    background: linear-gradient(135deg, #f43f5e, #fb7185);
}

.template-card span {
    font-size: 12px;
    color: var(--slate-500);
}

/* Platforms Section */
.platforms {
    padding: var(--section-padding) 0;
    background: var(--slate-900);
}

.platforms .section-tag {
    background: var(--slate-800);
    color: var(--amber-400);
}

.platforms .section-title,
.platforms .section-desc {
    color: var(--white);
}

.platforms .section-desc {
    color: var(--slate-400);
}

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

.platform-card {
    position: relative;
    background: var(--slate-800);
    border: 1px solid var(--slate-700);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition-base);
}

.platform-card:hover {
    background: var(--slate-700);
    border-color: var(--amber-600);
    transform: translateY(-4px);
}

.platform-card.featured {
    background: linear-gradient(135deg, var(--amber-900), var(--amber-800));
    border-color: var(--amber-600);
}

.platform-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--amber-500);
    color: var(--white);
    font-size: 11px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
}

.platform-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: var(--slate-700);
    border-radius: 16px;
    color: var(--amber-400);
}

.platform-card.featured .platform-icon {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
}

.platform-icon svg {
    width: 32px;
    height: 32px;
}

.platform-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 8px;
}

.platform-ver {
    font-size: 12px;
    color: var(--amber-400);
    font-weight: 500;
    margin-bottom: 12px;
}

.platform-desc {
    font-size: 13px;
    color: var(--slate-400);
    line-height: 1.6;
    margin-bottom: 16px;
}

.platform-req {
    font-size: 12px;
    color: var(--slate-500);
    background: var(--slate-900);
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.platform-req strong {
    color: var(--slate-300);
}

/* Reviews Section */
.reviews {
    padding: var(--section-padding) 0;
    background: var(--amber-50);
}

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

.review-card {
    background: var(--white);
    border-radius: 16px;
    padding: 28px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    transition: all var(--transition-base);
}

.review-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

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

.review-avatar {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
}

.avatar-1 { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.avatar-2 { background: linear-gradient(135deg, #3b82f6, #60a5fa); }
.avatar-3 { background: linear-gradient(135deg, #10b981, #34d399); }
.avatar-4 { background: linear-gradient(135deg, #f43f5e, #fb7185); }
.avatar-5 { background: linear-gradient(135deg, #8b5cf6, #a78bfa); }
.avatar-6 { background: linear-gradient(135deg, #06b6d4, #22d3ee); }

.review-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--slate-900);
}

.review-role {
    font-size: 12px;
    color: var(--slate-500);
}

.review-stars {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.review-stars svg {
    width: 16px;
    height: 16px;
    color: var(--amber-400);
}

.review-text {
    font-size: 14px;
    color: var(--slate-600);
    line-height: 1.7;
}

/* Security Section */
.security {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.security-item {
    text-align: center;
    padding: 32px 24px;
    background: var(--slate-50);
    border-radius: 16px;
    transition: all var(--transition-base);
}

.security-item:hover {
    background: var(--amber-50);
    transform: translateY(-4px);
}

.security-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: var(--white);
    border-radius: 50%;
    color: var(--amber-600);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.security-icon svg {
    width: 32px;
    height: 32px;
}

.security-item h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--slate-900);
    margin-bottom: 12px;
}

.security-item p {
    font-size: 13px;
    color: var(--slate-500);
    line-height: 1.6;
}

/* Comparison Table */
.comparison-section {
    max-width: 800px;
    margin: 0 auto;
}

.comparison-title {
    text-align: center;
    font-size: 22px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 32px;
}

.comparison-table-wrapper {
    background: var(--slate-50);
    border-radius: 16px;
    padding: 24px;
    overflow-x: auto;
}

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

.comparison-table th {
    text-align: left;
    padding: 14px 16px;
    font-weight: 600;
    color: var(--slate-700);
    border-bottom: 2px solid var(--slate-200);
}

.comparison-table th:first-child {
    width: 40%;
}

.comparison-table th:nth-child(2) {
    color: var(--amber-700);
}

.comparison-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--slate-200);
    color: var(--slate-600);
}

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

.comparison-table .yes {
    color: var(--emerald-500);
    font-weight: 500;
}

.comparison-table .no {
    color: var(--slate-400);
}

.comparison-table .partial {
    color: var(--amber-500);
}

/* Versions Section */
.versions {
    padding: var(--section-padding) 0;
    background: var(--slate-50);
}

.versions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 960px;
    margin: 0 auto;
}

.version-card {
    background: var(--white);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
    transition: all var(--transition-base);
    position: relative;
}

.version-card:hover {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.version-card.popular {
    border: 2px solid var(--amber-500);
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.15);
}

.version-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: linear-gradient(135deg, var(--amber-500), var(--amber-600));
    color: var(--white);
    font-size: 11px;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 20px;
}

.version-header {
    padding: 32px 24px;
    text-align: center;
    border-bottom: 1px solid var(--slate-100);
}

.version-header h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--slate-900);
    margin-bottom: 12px;
}

.version-price {
    font-size: 36px;
    font-weight: 800;
    color: var(--amber-600);
}

.version-price span {
    font-size: 14px;
    font-weight: 500;
    color: var(--slate-500);
}

.version-body {
    padding: 24px;
}

.version-features {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.version-features li {
    position: relative;
    padding-left: 24px;
    font-size: 14px;
    color: var(--slate-600);
}

.version-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--emerald-500);
    font-weight: 600;
}

.version-features li.no {
    color: var(--slate-400);
}

.version-features li.no::before {
    content: "×";
    color: var(--slate-300);
}

.version-footer {
    padding: 0 24px 24px;
}

/* FAQ Section */
.faq {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--slate-50);
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--slate-100);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 500;
    color: var(--slate-900);
    text-align: left;
    transition: background var(--transition-fast);
}

.faq-question:hover {
    background: var(--slate-100);
}

.faq-icon {
    width: 20px;
    height: 20px;
    color: var(--slate-400);
    transition: transform var(--transition-base);
}

.faq-item.open .faq-icon {
    transform: rotate(180deg);
    color: var(--amber-600);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-slow);
}

.faq-item.open .faq-answer {
    max-height: 500px;
}

.faq-answer-inner {
    padding: 0 24px 20px;
    font-size: 14px;
    color: var(--slate-600);
    line-height: 1.8;
}

/* CTA Section */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--amber-600), var(--amber-700));
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 16px;
}

.cta-content > p {
    font-size: 18px;
    color: var(--amber-100);
    margin-bottom: 32px;
}

.cta-note {
    font-size: 13px;
    color: var(--amber-200);
    margin-top: 16px;
}

/* Footer */
.footer {
    padding: 40px 0;
    background: var(--slate-900);
}

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

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo {
    width: 32px;
    height: 32px;
}

.footer-brand span {
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
}

.footer-security {
    font-size: 13px;
    color: var(--emerald-400);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.footer-security::before {
    content: "✓";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    background: var(--emerald-500);
    color: var(--white);
    border-radius: 50%;
    font-size: 11px;
}

.footer-copyright {
    font-size: 12px;
    color: var(--slate-500);
}

/* Loading Animation */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .hero-visual {
        order: -1;
    }
    
    .app-showcase {
        width: 320px;
        height: 320px;
    }
    
    .showcase-card {
        width: 140px;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .platforms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .security-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .deep-row {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .deep-row.reverse {
        direction: ltr;
    }
    
    .deep-visual {
        order: -1;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 8px;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .hero {
        padding: 100px 0 60px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-number {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features-grid,
    .platforms-grid,
    .reviews-grid,
    .security-grid,
    .versions-grid {
        grid-template-columns: 1fr;
    }
    
    .deep-row {
        padding: 24px;
    }
    
    .comparison-table-wrapper {
        padding: 16px;
    }
    
    .comparison-table {
        font-size: 13px;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 10px 12px;
    }
    
    .cta-content h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 16px;
    }
    
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .feature-card,
    .review-card,
    .platform-card {
        padding: 24px 20px;
    }
    
    .version-header,
    .version-body,
    .version-footer {
        padding-left: 20px;
        padding-right: 20px;
    }
    
    .faq-question {
        padding: 16px 20px;
        font-size: 15px;
    }
    
    .faq-answer-inner {
        padding: 0 20px 16px;
    }
}