* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #FF6B35;
    --secondary-color: #F7931E;
    --accent-color: #4ECDC4;
    --text-dark: #1a1a2e;
    --text-light: #f8f9fa;
    --bg-light: #ffffff;
    --bg-gray: #f5f7fa;
    --border-color: #e1e8ed;
    --success: #95E1D3;
    --warning: #FFD93D;
    --error: #FF6B6B;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-light);
    overflow-x: hidden;
}

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

.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-light);
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
    position: relative;
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--text-light);
    transition: width 0.3s ease;
}

.nav a:hover::after {
    width: 100%;
}

.nav a:hover {
    opacity: 0.9;
}

.hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 80px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 600px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><rect width="100" height="100" fill="none"/><circle cx="50" cy="50" r="40" stroke="rgba(255,255,255,0.1)" stroke-width="1" fill="none"/></svg>');
    opacity: 0.3;
}

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

.hero-content h1 {
    font-size: 56px;
    font-weight: 800;
    color: var(--text-light);
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 20px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 40px;
    line-height: 1.6;
}

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

.btn-primary,
.btn-secondary {
    padding: 16px 32px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
    font-size: 16px;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--text-light);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255,255,255,0.2);
    color: var(--text-light);
    border: 2px solid var(--text-light);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--text-light);
    color: var(--text-dark);
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image svg {
    max-width: 100%;
    height: auto;
    filter: drop-shadow(0 10px 30px rgba(0,0,0,0.3));
}

main {
    padding: 80px 0;
}

.content section {
    margin-bottom: 80px;
}

h2 {
    font-size: 40px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 32px;
    position: relative;
    padding-bottom: 16px;
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

h3 {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 16px;
}

h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

p {
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: #4a5568;
}

strong {
    color: var(--text-dark);
    font-weight: 600;
}

.intro-section {
    background: var(--bg-gray);
    padding: 60px;
    border-radius: 16px;
    box-shadow: var(--shadow-sm);
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 40px;
}

.app-card {
    background: var(--bg-light);
    padding: 32px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.app-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-color);
}

.app-icon {
    width: 80px;
    height: 80px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 32px;
    font-weight: 700;
    color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin: 40px 0;
}

.feature-box {
    background: var(--bg-light);
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    text-align: center;
}

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

.feature-icon {
    margin-bottom: 16px;
}

.comparison-table {
    background: var(--bg-light);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    margin: 40px 0;
}

.table-header {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 24px 32px;
}

.table-header h3 {
    color: var(--text-light);
    margin: 0;
}

.table-row {
    padding: 24px 32px;
    border-bottom: 1px solid var(--border-color);
    transition: background 0.2s ease;
}

.table-row:last-child {
    border-bottom: none;
}

.table-row:hover {
    background: var(--bg-gray);
}

.table-cell strong {
    display: block;
    color: var(--text-dark);
    font-size: 18px;
    margin-bottom: 8px;
}

.table-cell p {
    margin: 0;
    color: #4a5568;
}

.warning-box {
    background: linear-gradient(135deg, #fff5f5 0%, #fed7d7 100%);
    border-left: 4px solid var(--error);
    padding: 32px;
    border-radius: 12px;
    display: flex;
    gap: 24px;
    align-items: flex-start;
    margin: 40px 0;
    box-shadow: var(--shadow-sm);
}

.warning-icon {
    font-size: 48px;
    line-height: 1;
}

.warning-content h3 {
    color: var(--error);
    margin-bottom: 12px;
}

.warning-content p {
    margin: 0;
}

.legal-tips {
    background: var(--bg-gray);
    padding: 40px;
    border-radius: 12px;
    margin: 40px 0;
}

.legal-tips h4 {
    color: var(--text-dark);
    margin-bottom: 20px;
    font-size: 22px;
}

.legal-tips ul {
    list-style: none;
    padding: 0;
}

.legal-tips li {
    padding: 12px 0 12px 32px;
    position: relative;
    font-size: 17px;
    line-height: 1.7;
    color: #4a5568;
}

.legal-tips li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-weight: 700;
    font-size: 20px;
}

.steps-container {
    margin: 40px 0;
}

.step {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    align-items: flex-start;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.step-content {
    flex: 1;
}

.step-content h4 {
    margin-bottom: 8px;
}

.step-content p {
    margin: 0;
}

.conclusion-section {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 60px;
    border-radius: 16px;
    box-shadow: var(--shadow-md);
}

.final-cta {
    background: var(--bg-light);
    padding: 40px;
    border-radius: 12px;
    text-align: center;
    margin-top: 40px;
    box-shadow: var(--shadow-sm);
}

.final-cta h3 {
    color: var(--text-dark);
    margin-bottom: 12px;
}

.final-cta p {
    color: #4a5568;
    margin: 0;
    font-size: 18px;
}

.footer {
    background: var(--text-dark);
    color: var(--text-light);
    padding: 60px 0 24px;
    margin-top: 80px;
}

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

.footer-section h4 {
    color: var(--text-light);
    margin-bottom: 16px;
    font-size: 18px;
}

.footer-section p {
    color: rgba(255,255,255,0.7);
    font-size: 15px;
    line-height: 1.7;
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255,255,255,0.5);
    margin: 0;
    font-size: 14px;
}

@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 42px;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-image svg {
        max-width: 400px;
    }

    .nav {
        gap: 16px;
    }

    h2 {
        font-size: 32px;
    }

    .intro-section,
    .conclusion-section {
        padding: 40px 32px;
    }

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

@media (max-width: 640px) {
    .header .container {
        flex-direction: column;
        gap: 16px;
    }

    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px;
    }

    .nav a {
        font-size: 14px;
    }

    .hero {
        padding: 60px 0;
        min-height: auto;
    }

    .hero-content h1 {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-image svg {
        max-width: 100%;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        text-align: center;
    }

    main {
        padding: 40px 0;
    }

    .content section {
        margin-bottom: 60px;
    }

    h2 {
        font-size: 28px;
    }

    h3 {
        font-size: 22px;
    }

    p {
        font-size: 16px;
    }

    .intro-section,
    .conclusion-section {
        padding: 32px 24px;
    }

    .warning-box {
        flex-direction: column;
        padding: 24px;
    }

    .legal-tips {
        padding: 24px;
    }

    .step {
        flex-direction: column;
    }

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

    .comparison-table {
        margin: 24px -24px;
        border-radius: 0;
    }

    .table-row {
        padding: 20px 24px;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.intro-section,
.app-card,
.feature-box,
.warning-box {
    animation: fadeIn 0.6s ease-out forwards;
}

.app-card:nth-child(1) { animation-delay: 0.1s; }
.app-card:nth-child(2) { animation-delay: 0.2s; }
.app-card:nth-child(3) { animation-delay: 0.3s; }
.app-card:nth-child(4) { animation-delay: 0.4s; }