/* website_187 - fullscreen-nav layout with purple gradient */
:root {
    --primary: #8b5cf6;
    --primary-dark: #6d28d9;
    --text-light: #ffffff;
    --text-dark: #1f2937;
    --bg-dark: #1a1a2e;
    --glass-bg: rgba(139, 92, 246, 0.15);
}

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

body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f0f23 100%);
    color: var(--text-light);
    min-height: 100vh;
    overflow-x: hidden;
}

/* fullscreen-nav overlay */
.fullscreen-nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(20px);
    z-index: 9998;
    display: none;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transition: opacity 0.4s ease;
}

.fullscreen-nav-overlay.active {
    display: flex;
    opacity: 1;
}

.fullscreen-nav-close {
    position: absolute;
    top: 30px;
    right: 40px;
    width: 50px;
    height: 50px;
    background: var(--primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    z-index: 9999;
}

.fullscreen-nav-close:hover {
    background: var(--primary-dark);
    transform: rotate(90deg);
}

.fullscreen-nav-close::before,
.fullscreen-nav-close::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: white;
}

.fullscreen-nav-close::before { transform: rotate(45deg); }
.fullscreen-nav-close::after { transform: rotate(-45deg); }

.fullscreen-nav-menu {
    text-align: center;
    list-style: none;
}

.fullscreen-nav-menu li {
    margin: 20px 0;
    opacity: 0;
    transform: translateY(30px);
}

.fullscreen-nav-overlay.active li {
    animation: menuItemFade 0.5s ease forwards;
}

.fullscreen-nav-overlay.active li:nth-child(1) { animation-delay: 0.1s; }
.fullscreen-nav-overlay.active li:nth-child(2) { animation-delay: 0.2s; }
.fullscreen-nav-overlay.active li:nth-child(3) { animation-delay: 0.3s; }
.fullscreen-nav-overlay.active li:nth-child(4) { animation-delay: 0.4s; }
.fullscreen-nav-overlay.active li:nth-child(5) { animation-delay: 0.5s; }

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

.fullscreen-nav-menu a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 2rem;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
    padding: 10px 30px;
}

.fullscreen-nav-menu a:hover {
    color: var(--primary);
    transform: scale(1.05);
}

/* header & nav trigger */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(to bottom, rgba(15,15,35,0.9), transparent);
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-trigger {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border: none;
    color: white;
    padding: 12px 24px;
    border-radius: 30px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
}

.nav-trigger:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 30px rgba(139, 92, 246, 0.4);
}

.nav-trigger .hamburger {
    width: 20px;
    height: 2px;
    background: white;
    position: relative;
}

.nav-trigger .hamburger::before,
.nav-trigger .hamburger::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 2px;
    background: white;
    left: 0;
}

.nav-trigger .hamburger::before { top: -6px; }
.nav-trigger .hamburger::after { top: 6px; }

/* hero section */
.hero-banner {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.3;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary) 0%, transparent 70%);
    top: -200px;
    right: -200px;
    animation: floatShape 8s ease-in-out infinite;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--primary-dark) 0%, transparent 70%);
    bottom: -100px;
    left: -100px;
    animation: floatShape 10s ease-in-out infinite reverse;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, #a78bfa 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 4s ease-in-out infinite;
}

@keyframes floatShape {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -30px); }
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.3; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 0.5; }
}

.hero-content {
    text-align: center;
    z-index: 1;
    padding: 0 20px;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #fff 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(139, 92, 246, 0.4);
}

.btn-lg {
    padding: 16px 40px;
    font-size: 1.1rem;
}

/* sections */
.section {
    padding: 100px 0;
}

.section-gray {
    background: rgba(255, 255, 255, 0.03);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.125rem;
    opacity: 0.7;
}

/* feature grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-item {
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
}

.feature-item:hover {
    transform: translateY(-8px);
    background: rgba(139, 92, 246, 0.15);
    border-color: var(--primary);
    box-shadow: 0 20px 40px rgba(139, 92, 246, 0.2);
}

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 20px;
    border-radius: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.icon-gradient-purple {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.feature-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-text {
    font-size: 0.95rem;
    opacity: 0.7;
    line-height: 1.6;
}

/* card grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 36px;
    transition: all 0.3s;
}

.card-hover:hover {
    transform: translateY(-8px);
    background: rgba(139, 92, 246, 0.1);
    border-color: var(--primary);
}

.card-icon-wrapper {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.card-text {
    font-size: 0.95rem;
    opacity: 0.7;
    line-height: 1.8;
}

/* cta section */
.cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 80px 0;
    text-align: center;
}

.cta-title {
    font-size: 2.25rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta-text {
    font-size: 1.125rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

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

.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* footer */
.site-footer {
    background: rgba(0, 0, 0, 0.3);
    padding: 40px 0;
    text-align: center;
}

.footer-contact {
    margin-bottom: 20px;
}

.footer-contact p {
    margin: 8px 0;
    opacity: 0.8;
}

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

.footer-links a {
    color: var(--text-light);
    text-decoration: none;
    opacity: 0.7;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 1;
}

/* keyword page content */
.keyword-hero {
    padding-top: 120px;
    padding-bottom: 60px;
    text-align: center;
}

.keyword-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.keyword-desc {
    font-size: 1.125rem;
    opacity: 0.8;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

.keyword-content {
    padding: 60px 0;
}

.keyword-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.keyword-card {
    background: rgba(139, 92, 246, 0.1);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
}

.keyword-card-icon {
    font-size: 2rem;
    margin-bottom: 16px;
}

.keyword-card-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.keyword-card-text {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* responsive */
@media (max-width: 1024px) {
    .feature-grid { grid-template-columns: repeat(2, 1fr); }
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .keyword-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hero-title { font-size: 2.25rem; }
    .section-title { font-size: 1.75rem; }
    .feature-grid,
    .card-grid,
    .keyword-grid { grid-template-columns: 1fr; }
    .site-header { padding: 15px 20px; }
    .fullscreen-nav-menu a { font-size: 1.5rem; }
    .nav-trigger { padding: 10px 18px; font-size: 0.9rem; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 1.875rem; }
    .section-title { font-size: 1.5rem; }
    .btn-lg { padding: 14px 30px; font-size: 1rem; }
}