/* ========================================
   OKCLAW官网样式 - 简洁留白风格
   ======================================== */

:root {
    --color-primary: #1a56db;
    --color-primary-dark: #1e429f;
    --color-primary-light: #3b82f6;
    
    --color-text: #111827;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;
    
    --color-bg: #ffffff;
    --color-bg-secondary: #fafafa;
    
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --transition: 0.2s ease;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 32px;
}

/* ========== 导航栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.header-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 32px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.brand-logo svg {
    width: 100%;
    height: 100%;
}

.brand-name {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-item {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

.nav-item:hover {
    color: var(--color-text);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 24px;
}

.link-btn {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

.link-btn:hover {
    color: var(--color-text);
}

.primary-btn {
    padding: 10px 20px;
    background: var(--color-primary);
    color: white;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
}

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

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 80%;
    background: radial-gradient(ellipse, rgba(26, 86, 219, 0.06) 0%, transparent 70%);
    animation: float 20s ease-in-out infinite;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 60%;
    height: 60%;
    background: radial-gradient(ellipse, rgba(59, 130, 246, 0.04) 0%, transparent 70%);
    animation: float 15s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(30px, -20px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.hero-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeInUp 0.6s ease forwards;
}

.hero-heading {
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeInUp 0.6s ease 0.1s forwards;
}

.hero-text {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
    margin-bottom: 40px;
    opacity: 0;
    animation: fadeInUp 0.6s ease 0.2s forwards;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 64px;
    opacity: 0;
    animation: fadeInUp 0.6s ease 0.3s forwards;
}

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

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: var(--color-primary);
    color: white;
    font-size: 1rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all var(--transition);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(26, 86, 219, 0.2);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    color: var(--color-text);
    font-size: 1rem;
    font-weight: 500;
    transition: color var(--transition);
}

.btn-secondary:hover {
    color: var(--color-primary);
}

.hero-metrics {
    display: flex;
    justify-content: center;
    gap: 48px;
    opacity: 0;
    animation: fadeInUp 0.6s ease 0.4s forwards;
}

.metric {
    text-align: center;
}

.metric-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
}

.metric-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

/* ========== 功能 ========== */
.features {
    padding: 160px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-label {
    display: inline-block;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.section-desc {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

.features-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 64px 48px;
}

.feature {
    max-width: 400px;
}

.feature-icon {
    width: 48px;
    height: 48px;
    margin-bottom: 20px;
    color: var(--color-primary);
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

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

.feature-text {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ========== 展示 ========== */
.showcase {
    padding: 160px 0;
    background: #fafbfc;
}

.showcase-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.showcase-content {
    max-width: 400px;
}

.showcase-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.showcase-text {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
    margin-bottom: 32px;
}

.showcase-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.showcase-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 1rem;
}

.showcase-list li svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.showcase-visual {
    aspect-ratio: 4/3;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

/* ========== 定价 ========== */
.pricing {
    padding: 160px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 900px;
    margin: 0 auto;
}

.price-card {
    padding: 40px 32px;
    text-align: center;
}

.price-card.featured {
    background: #fafbfc;
    border-radius: 12px;
}

.price-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 12px;
}

.price-value {
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.price-value span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-muted);
}

.price-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

.price-features {
    text-align: left;
    margin-bottom: 32px;
}

.price-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.price-features li::before {
    content: '✓';
    color: var(--color-primary);
    font-weight: 600;
}

.price-btn {
    display: block;
    width: 100%;
    padding: 12px;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: 6px;
    transition: all var(--transition);
    text-align: center;
}

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

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

.price-btn.secondary {
    color: var(--color-primary);
}

.price-btn.secondary:hover {
    background: #fafbfc;
}

/* ========== FAQ ========== */
.faq {
    padding: 160px 0;
    background: #fafbfc;
}

.faq-list {
    max-width: 640px;
    margin: 0 auto;
}

.faq-item {
    padding: 32px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.faq-question {
    width: 100%;
    text-align: left;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: color var(--transition);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--color-text-muted);
    transition: transform var(--transition);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding-top: 16px;
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.75;
}

/* ========== 关于 ========== */
.about {
    padding: 160px 0;
}

.about-content {
    max-width: 640px;
    margin: 0 auto;
    text-align: center;
}

.about-text {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 24px;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 64px;
    margin-top: 48px;
}

/* ========== CTA ========== */
.cta {
    padding: 160px 0;
    background: linear-gradient(135deg, #1a56db 0%, #3b82f6 100%);
}

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

.cta-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
}

.cta-text {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 32px;
}

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

.cta .btn-primary:hover {
    background: var(--color-bg-secondary);
}

/* ========== Footer ========== */
.footer {
    padding: 64px 0;
}

.footer-grid {
    display: flex;
    justify-content: space-between;
    margin-bottom: 48px;
}

.footer-brand p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: 12px;
    max-width: 240px;
}

.footer-links h4 {
    font-size: 0.8125rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--color-text);
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid rgba(0, 0, 0, 0.04);
    text-align: center;
}

.copyright {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .main-nav, .header-actions {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero-metrics {
        flex-direction: column;
        gap: 24px;
    }
    
    .features-list {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .showcase-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 360px;
    }
    
    .about-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .footer-grid {
        flex-direction: column;
        gap: 32px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }
    
    .container {
        padding: 0 20px;
    }
}