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

:root {
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --secondary: #00b8d4;
    --accent: #ffa726;
    --accent-dark: #fb8c00;
    --text-dark: #1a1a1a;
    --text-light: #666666;
    --bg-dark: #1a1a2e;
    --bg-darker: #16213e;
    --bg-blue: #0f3460;
    --bg-light: #f5f7fa;
    --white: #ffffff;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.2);
    --radius: 16px;
    --transition: all 0.3s ease;
}

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;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--white);
    overflow-x: hidden;
}

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

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 40px;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: white;
    box-shadow: 0 4px 20px rgba(255, 167, 38, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 30px rgba(255, 167, 38, 0.5);
}

.btn-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: white;
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(26, 26, 46, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 16px 0;
}

.navbar .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: white;
}

.logo-icon {
    font-size: 32px;
}

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

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--accent);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 10px;
}

.hamburger span {
    width: 28px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(26, 26, 46, 0.98);
    backdrop-filter: blur(10px);
    padding: 30px 20px;
    flex-direction: column;
    gap: 20px;
    z-index: 999;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.mobile-menu .nav-link {
    font-size: 18px;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.hero {
    min-height: auto;
    padding: 120px 0 80px;
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-blue) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 900px;
    height: 900px;
    background: radial-gradient(circle, rgba(255, 167, 38, 0.1) 0%, transparent 60%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(0, 184, 212, 0.1) 0%, transparent 60%);
    border-radius: 50%;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    animation: fadeInUp 0.8s ease;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 167, 38, 0.2);
    padding: 8px 20px;
    border-radius: 50px;
    font-size: 14px;
    color: var(--accent);
    margin-bottom: 24px;
    border: 1px solid rgba(255, 167, 38, 0.3);
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    color: white;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--accent) 0%, #ffd700 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.8;
}

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

.hero-visual {
    position: relative;
}

.hero-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    box-shadow: var(--shadow-lg);
}

.price-display {
    text-align: center;
    margin-bottom: 24px;
}

.price-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 8px;
}

.price-value {
    font-size: 56px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent) 0%, #ffd700 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.price-unit {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
}

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

.preview-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
}

.preview-icon {
    font-size: 18px;
}

.wave-divider {
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    line-height: 0;
    overflow: visible;
}

.wave-divider svg {
    display: block;
    width: 100%;
    height: 80px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
    padding: 0 10px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-light);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    padding: 0 10px;
}

.feature-card {
    background: white;
    border-radius: var(--radius);
    padding: 30px 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(0, 102, 204, 0.1) 0%, rgba(0, 184, 212, 0.1) 100%);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.feature-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

.stats-section {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-blue) 100%);
    color: white;
    padding: 60px 0;
}

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

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

.stat-number {
    font-size: 40px;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.highlight-section {
    background: var(--bg-light);
    padding: 80px 0;
}

.highlight-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.highlight-content h3 {
    font-size: 30px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.highlight-content p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 24px;
    line-height: 1.7;
}

.highlight-list {
    list-style: none;
}

.highlight-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 15px;
    color: var(--text-dark);
}

.highlight-list .check-icon {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: white;
    font-size: 12px;
}

.highlight-visual {
    position: relative;
}

.highlight-card {
    background: white;
    border-radius: 24px;
    padding: 40px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.big-icon {
    font-size: 80px;
    text-align: center;
    margin-bottom: 24px;
}

.highlight-card h4 {
    font-size: 22px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 12px;
    color: var(--text-dark);
    line-height: 1.5;
}

.highlight-card p {
    text-align: center;
    color: var(--text-light);
    font-size: 15px;
}

.pricing-section {
    background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-blue) 100%);
    color: white;
    padding: 80px 0;
}

.pricing-section .section-header .section-title,
.pricing-section .section-header .section-subtitle {
    color: white;
}

.pricing-section .section-header .section-subtitle {
    opacity: 0.9;
}

.pricing-card {
    max-width: 600px;
    margin: 0 auto;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-radius: 28px;
    padding: 50px 40px;
    border: 2px solid rgba(255, 167, 38, 0.5);
    text-align: center;
}

.pricing-badge {
    display: inline-block;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 20px;
}

.pricing-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 12px;
}

.pricing-desc {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 30px;
    line-height: 1.7;
}

.pricing-features {
    list-style: none;
    margin-bottom: 30px;
    text-align: left;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.pricing-features .check {
    color: var(--accent);
    font-size: 16px;
}

.pricing-sub-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent);
    margin: 20px 0 15px;
    text-align: center;
}

.pricing-amount {
    margin-bottom: 24px;
}

.pricing-amount .amount {
    font-size: 56px;
    font-weight: 800;
}

.pricing-amount .currency {
    font-size: 22px;
    vertical-align: super;
}

.pricing-amount .period {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
}

.cta-section {
    padding: 80px 0;
    background: var(--white);
    text-align: center;
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.cta-desc {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 20px;
}

.qrcode-wrapper {
    margin-top: 30px;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.qrcode-img {
    width: 140px;
    height: 140px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    padding: 8px;
    background: white;
}

.qrcode-tip {
    font-size: 14px;
    color: var(--text-light);
}

.footer {
    background: var(--bg-dark);
    color: white;
    padding: 50px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    gap: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
    font-size: 14px;
}

.footer-link:hover {
    color: var(--accent);
}

.footer-bottom {
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 13px;
}

.back-home {
    position: fixed;
    bottom: 20px;
    left: 20px;
    background: var(--primary);
    color: white;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    z-index: 998;
}

.back-home:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

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

    .hero-title {
        font-size: 40px;
    }

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

    .hero-visual {
        max-width: 450px;
        margin: 0 auto;
    }

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

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

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

    .highlight-visual {
        order: -1;
    }

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

    .highlight-list li {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 10px 0;
    }

    .navbar .logo {
        font-size: 18px;
        gap: 8px;
    }

    .navbar .logo-icon {
        font-size: 24px;
    }

    .hamburger {
        gap: 4px;
        padding: 6px;
    }

    .hamburger span {
        width: 22px;
        height: 2px;
    }

    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .navbar .container {
        justify-content: space-between;
        width: 100%;
    }

    .navbar .logo {
        margin-right: auto;
    }

    .hero {
        padding: 80px 0 60px;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-desc {
        font-size: 15px;
    }

    .price-value {
        font-size: 48px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

    .stat-number {
        font-size: 32px;
    }

    .stat-label {
        font-size: 13px;
    }

    .highlight-section {
        padding: 60px 0;
    }

    .highlight-content h3 {
        font-size: 24px;
    }

    .highlight-content p {
        font-size: 14px;
    }

    .highlight-card {
        padding: 30px 24px;
    }

    .big-icon {
        font-size: 60px;
    }

    .pricing-section {
        padding: 60px 0;
    }

    .pricing-card {
        padding: 36px 24px;
        margin: 0 16px;
    }

    .pricing-title {
        font-size: 24px;
    }

    .pricing-amount .amount {
        font-size: 48px;
    }

    .cta-section {
        padding: 60px 0;
    }

    .cta-title {
        font-size: 28px;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }

    .footer-brand {
        font-size: 18px;
    }

    .back-home {
        width: 44px;
        height: 44px;
        bottom: 16px;
        left: 16px;
    }

    .btn {
        padding: 12px 28px;
        font-size: 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-badge {
        font-size: 12px;
        padding: 6px 16px;
    }

    .hero-title {
        font-size: 24px;
    }

    .hero-desc {
        font-size: 14px;
    }

    .hero-card {
        padding: 24px 20px;
    }

    .price-value {
        font-size: 42px;
    }

    .price-unit {
        font-size: 16px;
    }

    .features-preview {
        grid-template-columns: 1fr 1fr;
        gap: 10px;
    }

    .preview-item {
        font-size: 12px;
    }

    .preview-icon {
        font-size: 16px;
    }

    .feature-icon {
        width: 52px;
        height: 52px;
        font-size: 24px;
    }

    .feature-title {
        font-size: 18px;
    }

    .feature-desc {
        font-size: 13px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stat-number {
        font-size: 28px;
    }

    .highlight-list {
        text-align: left;
    }

    .highlight-list li {
        justify-content: flex-start;
    }

    .big-icon {
        font-size: 50px;
    }

    .pricing-features li {
        font-size: 13px;
        padding: 8px 0;
    }

    .pricing-amount .amount {
        font-size: 42px;
    }

    .cta-title {
        font-size: 24px;
    }

    .cta-desc {
        font-size: 14px;
    }

    .btn {
        width: 100%;
        max-width: 280px;
    }

    .qrcode-wrapper {
        margin-top: 24px;
    }

    .qrcode-img {
        width: 120px;
        height: 120px;
    }

    .qrcode-tip {
        font-size: 13px;
    }
}