:root {
    --primary: #165DFF;
    --primary-light: #3B82FF;
    --primary-dark: #0D47E8;
    --bg-dark: #0A0E17;
    --bg-card: #111827;
    --bg-card-hover: #1A2332;
    --text-primary: #FFFFFF;
    --text-secondary: #9CA3AF;
    --text-muted: #6B7280;
    --border-color: #1F2937;
    --border-light: #374151;
    --gradient-primary: linear-gradient(135deg, #165DFF 0%, #3B82FF 100%);
    --gradient-dark: linear-gradient(180deg, #0A0E17 0%, #111827 100%);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.4);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

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

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 20px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto 60px;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
}

.nav-logo span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-menu a {
    font-size: 15px;
    color: var(--text-secondary);
    padding: 8px 0;
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--text-primary);
}

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

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.nav-cta {
    background: var(--primary);
    color: white !important;
    padding: 10px 24px !important;
    border-radius: 8px;
    font-weight: 500;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--primary-light);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    background: linear-gradient(180deg, #0A0E17 0%, #111827 50%, #0A0E17 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150%;
    height: 100%;
    background: radial-gradient(ellipse at center top, rgba(22, 93, 255, 0.15) 0%, transparent 60%);
    pointer-events: none;
}

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

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(22, 93, 255, 0.1);
    border: 1px solid rgba(22, 93, 255, 0.3);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    color: var(--primary-light);
    margin-bottom: 24px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 16px;
}

.hero-title span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 24px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 400;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 24px;
}

.hero-tags {
    overflow: hidden;
    margin-bottom: 24px;
}

.hero-tags-scroll {
    display: flex;
    gap: 40px;
    width: max-content;
    animation: tagScroll 15s linear infinite;
}

@keyframes tagScroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-100%);
    }
}

.hero-tag {
    flex-shrink: 0;
    color: white;
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 10px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 20px rgba(22, 93, 255, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(22, 93, 255, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}

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

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
    width: 280px;
    height: 580px;
    background: #1A1A1A;
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-lg), 0 0 60px rgba(22, 93, 255, 0.2);
}

.phone-mockup::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 28px;
    background: #000;
    border-radius: 14px;
    z-index: 2;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #1E3A5F 0%, #0D1B2A 100%);
    border-radius: 30px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.phone-header {
    padding: 40px 16px 16px;
    text-align: center;
}

.phone-header h3 {
    font-size: 14px;
    color: white;
    font-weight: 600;
}

.phone-header p {
    font-size: 10px;
    color: rgba(255,255,255,0.6);
}

.phone-content {
    flex: 1;
    padding: 0 12px;
}

.phone-card {
    background: rgba(255,255,255,0.05);
    border-radius: 12px;
    padding: 12px;
    margin-bottom: 8px;
}

.phone-card-title {
    font-size: 10px;
    color: rgba(255,255,255,0.5);
    margin-bottom: 4px;
}

.phone-card-value {
    font-size: 18px;
    color: white;
    font-weight: 700;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.feature-mini {
    background: rgba(255,255,255,0.03);
    border-radius: 10px;
    padding: 10px;
}

.feature-mini-title {
    font-size: 9px;
    color: var(--primary-light);
    margin-bottom: 2px;
}

.feature-mini-value {
    font-size: 12px;
    color: white;
    font-weight: 600;
}

.core-features {
    background: var(--bg-card);
}

.features-section {
    padding: 100px 0;
}

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

.feature-card {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px 24px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(22, 93, 255, 0.15);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: rgba(22, 93, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 24px;
}

.feature-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.advantages {
    background: var(--bg-dark);
}

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

.advantage-item {
    text-align: center;
    padding: 24px;
}

.advantage-icon {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 20px;
}

.advantage-title {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
}

.advantage-desc {
    font-size: 13px;
    color: var(--text-muted);
}

.capability-section {
    background: var(--bg-card);
}

.capability-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.capability-card {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px 32px;
    transition: all 0.3s ease;
}

.capability-card:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 32px rgba(22, 93, 255, 0.1);
}

.capability-icon {
    width: 64px;
    height: 64px;
    background: rgba(22, 93, 255, 0.1);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 28px;
}

.capability-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
}

.capability-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.capability-list li {
    font-size: 14px;
    color: var(--text-secondary);
    padding-left: 20px;
    position: relative;
}

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

.solutions-section {
    background: var(--bg-dark);
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.solution-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 48px 40px;
    transition: all 0.3s ease;
}

.solution-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.solution-icon {
    width: 72px;
    height: 72px;
    background: rgba(22, 93, 255, 0.1);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 28px;
    font-size: 32px;
}

.solution-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
}

.solution-desc {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.solution-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.solution-tag {
    background: rgba(22, 93, 255, 0.1);
    color: var(--primary-light);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
}

.demo-section {
    background: var(--bg-card);
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
}

.demo-item {
    text-align: center;
}

.demo-phone {
    background: #1A1A1A;
    border-radius: 32px;
    padding: 10px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
}

.demo-item:hover .demo-phone {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), 0 0 40px rgba(22, 93, 255, 0.2);
}

.demo-screen {
    background: linear-gradient(180deg, #1E3A5F 0%, #0D1B2A 100%);
    border-radius: 24px;
    height: 400px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.demo-screen-header {
    padding: 30px 16px 12px;
    text-align: center;
}

.demo-screen-header h4 {
    font-size: 12px;
    color: white;
    font-weight: 600;
}

.demo-screen-content {
    flex: 1;
    padding: 12px;
}

.demo-screen-card {
    background: rgba(255,255,255,0.05);
    border-radius: 10px;
    padding: 10px;
    margin-bottom: 8px;
}

.demo-screen-title {
    font-size: 8px;
    color: rgba(255,255,255,0.5);
}

.demo-screen-value {
    font-size: 14px;
    color: white;
    font-weight: 600;
}

.demo-label {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 6px;
}

.demo-desc {
    font-size: 13px;
    color: var(--text-muted);
}

.pricing-section {
    background: var(--bg-dark);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 48px 40px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.pricing-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.pricing-card.featured {
    border-color: var(--primary);
    background: linear-gradient(180deg, rgba(22, 93, 255, 0.1) 0%, var(--bg-card) 100%);
}

.pricing-card.featured::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: 4px 16px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 600;
}

.pricing-name {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.pricing-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 32px;
}

.pricing-price {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 8px;
}

.pricing-price span {
    font-size: 16px;
    font-weight: 400;
    color: var(--text-muted);
}

.pricing-period {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 32px;
}

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

.pricing-features li {
    font-size: 14px;
    color: var(--text-secondary);
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-features li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
}

.pricing-btn {
    width: 100%;
}

.about-section {
    background: var(--bg-card);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
}

.about-title span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about-desc {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.about-value {
    text-align: center;
}

.about-value-icon {
    width: 56px;
    height: 56px;
    background: rgba(22, 93, 255, 0.1);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
}

.about-value-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.about-value-desc {
    font-size: 14px;
    color: var(--text-muted);
}

.contact-section {
    background: var(--bg-dark);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
}

.contact-info p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon {
    width: 48px;
    height: 48px;
    background: rgba(22, 93, 255, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.contact-text {
    font-size: 15px;
    color: var(--text-secondary);
}

.contact-form {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 40px;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    padding: 14px 16px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 15px;
    color: var(--text-primary);
    transition: border-color 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
}

.form-input::placeholder {
    color: var(--text-muted);
}

textarea.form-input {
    resize: vertical;
    min-height: 120px;
}

.footer {
    background: var(--bg-dark);
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.footer-brand h3 span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

.footer-links h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
    padding: 6px 0;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.footer-copyright {
    font-size: 13px;
    color: var(--text-muted);
}

.footer-copyright a {
    color: var(--primary-light);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(10, 14, 23, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu.active {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 14px 0;
    font-size: 16px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-color);
}

.mobile-menu a:last-child {
    border-bottom: none;
}

@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-title {
        font-size: 42px;
    }

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

    .hero-visual {
        display: none;
    }

    .features-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .capability-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .demo-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .about-values {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 32px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .features-grid-4 {
        grid-template-columns: 1fr;
    }

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

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

    .demo-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .demo-screen {
        height: 300px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}