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

:root {
    --primary-pink: #ff4d94;
    --dark-bg: #0a0a0a;
    --off-white: #fafafa;
    --text-dark: #1a1a1a;
    --text-light: #666;
    --border-light: #e5e5e5;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: white;
    line-height: 1.6;
    color: var(--text-dark);
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 6%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 32px;
    font-weight: 800;
    cursor: pointer;
    letter-spacing: -1px;
    transition: all 0.3s ease;
}

.logo .white-text { color: white; }
.logo .pink-text {
    background: linear-gradient(135deg, var(--primary-pink), #ff8fb3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo:hover { transform: translateY(-2px); }

.btn-back {
    padding: 12px 28px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.08);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-back:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #0a0a0a 0%, #1a1a1a 40%, #2a1a2a 70%, #ff4d94 100%);
    padding: 120px 6% 80px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -150px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255, 77, 148, 0.2), transparent);
    border-radius: 50%;
    filter: blur(60px);
}

.hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 300;
    color: white;
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
}

.hero-title strong {
    font-weight: 800;
    background: linear-gradient(135deg, #fff 0%, var(--primary-pink) 50%, #ffb3d1 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* Content Section */
.content-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 80px 6% 100px;
}

.update-date {
    display: inline-block;
    background: rgba(255, 77, 148, 0.1);
    color: var(--primary-pink);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 40px;
}

.section { margin-bottom: 60px; }

.section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary-pink);
    display: inline-block;
}

.subsection-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-dark);
    margin: 30px 0 15px;
}

.section p {
    color: var(--text-light);
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.section ul {
    list-style: none;
    padding-left: 0;
    margin: 20px 0;
}

.section ul li {
    color: var(--text-light);
    font-size: 17px;
    line-height: 1.8;
    padding-left: 30px;
    position: relative;
    margin-bottom: 12px;
}

.section ul li::before {
    content: '◆';
    color: var(--primary-pink);
    position: absolute;
    left: 0;
    font-size: 14px;
}

.highlight-box {
    background: var(--off-white);
    border-left: 4px solid var(--primary-pink);
    padding: 24px 28px;
    border-radius: 12px;
    margin: 30px 0;
}

.highlight-box p {
    margin-bottom: 0;
    color: var(--text-dark);
}

.definition-term {
    font-weight: 600;
    color: var(--text-dark);
}

/* Contact Section */
.contact-section {
    background: var(--off-white);
    padding: 60px 6%;
    text-align: center;
}

.contact-content {
    max-width: 700px;
    margin: 0 auto;
}

.contact-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.contact-text {
    color: var(--text-light);
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 30px;
}

.btn-contact {
    padding: 16px 40px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary-pink), #ff6ba3);
    color: white;
    border: none;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    box-shadow: 0 6px 24px rgba(255, 77, 148, 0.3);
}

.btn-contact:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(255, 77, 148, 0.5);
}

/* Footer */
footer {
    background: var(--dark-bg);
    padding: 60px 6%;
    text-align: center;
}

.footer-logo {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 32px;
}

.footer-logo .white { color: white; }
.footer-logo .pink {
    background: linear-gradient(135deg, var(--primary-pink), #ff8fb3);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.footer-link {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 15px;
    transition: all 0.3s ease;
}

.footer-link:hover { color: white; }

.footer-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 30px 0;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.4);
    font-size: 14px;
}

/* Responsive */
@media (max-width: 768px) {
    header { padding: 20px 20px; }
    .logo { font-size: 26px; }
    .hero { padding: 100px 20px 60px; }
    .content-section { padding: 60px 20px 80px; }
    .section-title { font-size: 24px; }
    .subsection-title { font-size: 20px; }
    .section p, .section ul li { font-size: 16px; }
    .contact-section { padding: 50px 20px; }
    footer { padding: 50px 20px; }
    .footer-links { flex-direction: column; gap: 20px; }
}