/* ==================== ROOT & RESET ==================== */
:root {
    --bg-primary: #050A14;
    --bg-secondary: #0A1628;
    --bg-card: #0F1D32;
    --bg-card-hover: #142440;

    --text-primary: #F0F4F8;
    --text-secondary: #8A9BB5;
    --text-muted: #5A6F8A;

    --accent-blue: #2563EB;
    --accent-blue-light: #3B82F6;
    --accent-blue-glow: rgba(37, 99, 235, 0.15);
    --accent-gold: #D4A853;
    --accent-gold-light: #E8C97A;
    --accent-green: #10B981;

    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    --font-en: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-zh: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;

    --nav-height: 72px;
    --container-max: 1200px;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-en);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

[data-lang="zh"] body,
[data-lang="zh"] * {
    font-family: var(--font-zh);
}

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

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}


/* ==================== NAVBAR ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    transition: background 0.3s, backdrop-filter 0.3s, box-shadow 0.3s;
}

.navbar.scrolled {
    background: rgba(5, 10, 20, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 var(--border);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s;
    letter-spacing: 0.3px;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-toggle {
    background: transparent;
    border: 1px solid var(--border-hover);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-en);
}

.lang-toggle:hover {
    border-color: var(--accent-blue);
    color: var(--text-primary);
}

.nav-cta {
    background: var(--accent-blue);
    color: white;
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-cta:hover {
    background: var(--accent-blue-light);
    transform: translateY(-1px);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all 0.3s;
}


/* ==================== HERO ==================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.grid-lines {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.15), transparent 70%);
    top: -10%;
    right: -5%;
    animation: float 20s ease-in-out infinite;
}

.glow-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(212, 168, 83, 0.08), transparent 70%);
    bottom: 10%;
    left: -5%;
    animation: float 25s ease-in-out infinite reverse;
}

.glow-3 {
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.06), transparent 70%);
    top: 40%;
    left: 30%;
    animation: float 30s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(30px, -30px); }
    66% { transform: translate(-20px, 20px); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.2);
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 13px;
    color: var(--accent-blue-light);
    margin-bottom: 32px;
    letter-spacing: 0.5px;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent-green);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-title {
    font-size: clamp(36px, 5.5vw, 64px);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 24px;
    letter-spacing: -0.5px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-blue-light), var(--accent-gold-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    transition: all 0.25s;
    cursor: pointer;
    border: none;
    letter-spacing: 0.2px;
}

.btn-primary {
    background: var(--accent-blue);
    color: white;
    box-shadow: 0 4px 20px rgba(37, 99, 235, 0.3);
}

.btn-primary:hover {
    background: var(--accent-blue-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(37, 99, 235, 0.4);
}

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

.btn-outline:hover {
    border-color: var(--accent-blue);
    background: rgba(37, 99, 235, 0.05);
}

.btn-full {
    width: 100%;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

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

.hero-stat-number {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.hero-stat-label {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
    display: block;
}

.hero-stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-blue), transparent);
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0% { opacity: 0; transform: translateY(-10px); }
    50% { opacity: 1; }
    100% { opacity: 0; transform: translateY(10px); }
}


/* ==================== SECTIONS ==================== */
.section {
    padding: 120px 0;
    position: relative;
}

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

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2.5px;
    text-transform: uppercase;
    color: var(--accent-blue-light);
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.3px;
}

.section-desc {
    font-size: 17px;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.7;
}


/* ==================== SERVICES ==================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    transition: all 0.3s;
}

.service-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.service-icon {
    width: 48px;
    height: 48px;
    color: var(--accent-blue);
    margin-bottom: 24px;
}

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

.service-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
}


/* ==================== STATS ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat-card {
    text-align: center;
    padding: 40px 20px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
}

.stat-card:hover {
    border-color: rgba(37, 99, 235, 0.3);
    background: rgba(37, 99, 235, 0.03);
}

.stat-number {
    font-size: 52px;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
    letter-spacing: -2px;
}

.stat-unit {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent-blue-light);
    margin: 8px 0 12px;
    letter-spacing: 0.5px;
}

.stat-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.5;
}


/* ==================== DOMAINS ==================== */
.domains-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.domain-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    transition: all 0.3s;
    position: relative;
}

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

.domain-featured {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.06), rgba(212, 168, 83, 0.04));
    border-color: rgba(37, 99, 235, 0.15);
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 32px;
    align-items: start;
}

.domain-featured .domain-icon {
    grid-row: 1 / 4;
}

.domain-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
    color: var(--bg-primary);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 1.5px;
    padding: 4px 12px;
    border-radius: 4px;
}

.domain-icon {
    width: 64px;
    height: 64px;
    color: var(--accent-blue);
    margin-bottom: 20px;
    flex-shrink: 0;
}

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

.domain-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.domain-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
}

.domain-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.domain-tags span {
    background: rgba(37, 99, 235, 0.1);
    border: 1px solid rgba(37, 99, 235, 0.2);
    color: var(--accent-blue-light);
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 100px;
}

.domain-upcoming {
    border-style: dashed;
    opacity: 0.8;
}


/* ==================== COMPLIANCE ==================== */
.compliance-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.compliance-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 32px 24px;
    text-align: center;
    transition: all 0.3s;
}

.compliance-card:hover {
    border-color: rgba(16, 185, 129, 0.3);
    background: rgba(16, 185, 129, 0.03);
}

.compliance-badge {
    font-size: 24px;
    font-weight: 800;
    color: var(--accent-green);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.compliance-card p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

.compliance-features {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.compliance-feature {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.compliance-feature svg {
    width: 20px;
    height: 20px;
    color: var(--accent-green);
    flex-shrink: 0;
}


/* ==================== PARTNERS ==================== */
.partners-showcase {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.partner-category h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    text-align: center;
}

.partner-logos {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
}

.partner-logo-placeholder {
    width: 180px;
    height: 72px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    transition: all 0.3s;
    background: rgba(255, 255, 255, 0.01);
}

.partner-logo-placeholder:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.03);
}

.partners-note {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 32px;
    font-style: italic;
}


/* ==================== ADVANTAGES ==================== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.advantage-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    transition: all 0.3s;
}

.advantage-card:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-4px);
}

.advantage-number {
    font-size: 48px;
    font-weight: 800;
    color: rgba(37, 99, 235, 0.15);
    line-height: 1;
    margin-bottom: 16px;
    letter-spacing: -2px;
}

.advantage-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.advantage-card p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.7;
}


/* ==================== CONTACT ==================== */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-tag {
    text-align: left;
}

.contact-info .section-title {
    text-align: left;
    font-size: clamp(24px, 3.5vw, 36px);
}

.contact-desc {
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.7;
    margin: 20px 0 32px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 15px;
}

.contact-item svg {
    width: 20px;
    height: 20px;
    color: var(--accent-blue);
    flex-shrink: 0;
}

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

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.2s;
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--accent-blue);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238A9BB5' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-success {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 16px;
    color: var(--accent-green);
    font-size: 14px;
    font-weight: 500;
}

.form-success svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}


/* ==================== FOOTER ==================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 32px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 360px;
}

.footer-brand .nav-logo {
    margin-bottom: 16px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.footer-col a {
    font-size: 14px;
    color: var(--text-muted);
    transition: color 0.2s;
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
}

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


/* ==================== ANIMATIONS ==================== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.5s; }


/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .services-grid,
    .domains-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .domain-featured {
        grid-template-columns: 1fr;
    }

    .domain-featured .domain-icon {
        grid-row: auto;
    }

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

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

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: rgba(5, 10, 20, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 24px;
        gap: 0;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links a {
        display: block;
        padding: 12px 0;
        font-size: 16px;
        border-bottom: 1px solid var(--border);
    }

    .nav-cta {
        display: none;
    }

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

    .section {
        padding: 80px 0;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .hero-stats {
        gap: 20px;
    }

    .hero-stat-divider {
        display: none;
    }

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

    .stat-number {
        font-size: 36px;
    }

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

    .compliance-features {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 40px;
    }

    .footer-links {
        gap: 40px;
    }

    .partner-logo-placeholder {
        width: 140px;
        height: 56px;
    }
}