/* 万象云 (Wanxiangyun) Design System - Light Theme v2.1 */
:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-hover: #f1f5f9;
    --color-text: #0f172a;
    --color-text-muted: #475569;
    --color-accent: #0284c7;
    --color-accent-hover: #0369a1;
    --color-accent-light: #e0f2fe;
    --color-accent-gradient: linear-gradient(135deg, #0284c7 0%, #2563eb 100%);
    --color-border: #e2e8f0;
    --color-border-hover: #0284c7;
    --color-success: #16a34a;
    --color-danger: #dc2626;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --elevation-1: 0 1px 3px rgba(15, 23, 42, 0.05), 0 1px 2px rgba(15, 23, 42, 0.03);
    --elevation-2: 0 10px 25px -5px rgba(15, 23, 42, 0.06), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    --elevation-3: 0 20px 35px -10px rgba(2, 132, 199, 0.15), 0 10px 15px -5px rgba(15, 23, 42, 0.05);
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* Container */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }

/* Links & Buttons */
a { text-decoration: none; color: var(--color-accent); transition: color 0.28s ease, opacity 0.28s ease; }
a:hover { color: var(--color-accent-hover); }

a:focus-visible, button:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

/* Glass & Card Components */
.glass-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--elevation-1);
    padding: 30px;
    transition: transform .28s cubic-bezier(.34, 1.56, .64, 1), box-shadow 0.28s ease, border-color 0.28s ease;
}

.glass-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: var(--elevation-3);
}

/* Typography */
h1, h2, h3 { margin-bottom: 20px; font-weight: 700; line-height: 1.25; color: var(--color-text); }
h1 {
    font-size: 3.2rem;
    color: var(--color-accent);
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: inline-block;
}

h2 { font-size: 2.2rem; text-align: center; margin-bottom: 40px; }
h3 { font-size: 1.35rem; color: var(--color-text); }
p { margin-bottom: 15px; color: var(--color-text-muted); }

/* Buttons */
.cta-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background: var(--color-accent-gradient);
    color: #ffffff !important;
    padding: 12px 28px;
    border-radius: var(--radius-lg);
    font-size: 1.05rem;
    font-weight: 600;
    text-align: center;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
    transition: transform .28s cubic-bezier(.34, 1.56, .64, 1), box-shadow 0.28s ease;
    min-height: 44px;
    min-width: 44px;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(2, 132, 199, 0.45);
}

.cta-btn:active {
    transform: translateY(0);
}

.btn-outline {
    background: var(--color-surface);
    color: var(--color-accent) !important;
    border: 1.5px solid var(--color-accent);
    box-shadow: var(--elevation-1);
}

.btn-outline:hover {
    background: var(--color-accent-light);
    color: var(--color-accent-hover) !important;
    box-shadow: var(--elevation-2);
}

/* Header & Nav */
header {
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header-inner { display: flex; justify-content: space-between; align-items: center; }
.logo { font-size: 1.75rem; font-weight: 800; color: var(--color-text); letter-spacing: -0.5px; }
.logo span { color: var(--color-accent); }
.nav-menu { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; }
.nav-menu a { color: var(--color-text-muted); font-size: 0.95rem; font-weight: 500; }
.nav-menu a:hover { color: var(--color-accent); }

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-text);
    padding: 8px;
    min-width: 44px;
    min-height: 44px;
}

/* Hero Section */
.hero-section { padding: 80px 0 60px 0; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.hero-left { flex: 1.1; z-index: 2; }
.hero-left p { font-size: 1.15rem; max-width: 520px; margin-bottom: 30px; color: var(--color-text-muted); }

/* Hero Trust Pills */
.trust-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 24px;
}

.pill {
    display: inline-flex;
    align-items: center;
    background: var(--color-accent-light);
    color: var(--color-accent-hover);
    font-size: 0.88rem;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(2, 132, 199, 0.2);
}

.hero-btn-group { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
.trust-microcopy { font-size: 0.85rem; color: var(--color-text-muted); margin-top: 12px; }

/* SVG Illustration Hero Right */
.hero-right {
    flex: 0.9;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-illustration {
    width: 100%;
    max-width: 420px;
    height: auto;
}

/* Promo Banner in Pricing */
.promo-banner {
    background: linear-gradient(90deg, #eff6ff 0%, #e0f2fe 100%);
    border: 1px dashed var(--color-accent);
    border-radius: var(--radius-md);
    padding: 16px 20px;
    text-align: center;
    font-weight: 600;
    color: var(--color-accent-hover);
    margin-bottom: 30px;
    font-size: 1.05rem;
}

.promo-code-badge {
    background: var(--color-accent);
    color: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-family: monospace;
    font-size: 1.1rem;
    margin: 0 4px;
}

/* Grid Layouts */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 48px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-bottom: 48px; }
section { padding: 60px 0; }

/* Pricing Cards */
.pricing-card {
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

.pricing-card.popular {
    border: 2px solid var(--color-accent);
    box-shadow: var(--elevation-3);
}

.popular-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent-gradient);
    color: #fff;
    padding: 4px 16px;
    border-radius: 16px;
    font-size: 0.85rem;
    font-weight: 700;
    white-space: nowrap;
}

.price { font-size: 2.8rem; font-weight: 800; color: var(--color-text); margin: 16px 0; }
.price span { font-size: 1rem; color: var(--color-text-muted); font-weight: 400; }
.pricing-features { list-style: none; margin-bottom: 24px; text-align: left; }
.pricing-features li { margin-bottom: 12px; padding-left: 24px; position: relative; font-size: 0.95rem; color: var(--color-text-muted); }
.pricing-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: var(--color-accent);
    font-weight: bold;
}

.refund-tag {
    font-size: 0.82rem;
    color: var(--color-text-muted);
    margin-top: 8px;
    text-align: center;
}

/* FAQ */
.faq-item { margin-bottom: 16px; padding-bottom: 16px; border-bottom: 1px solid var(--color-border); }
.faq-question { font-size: 1.15rem; font-weight: 700; color: var(--color-text); margin-bottom: 8px; }

/* Sticky Mobile CTA Bar */
.sticky-mobile-bar {
    display: none;
}

@media (max-width: 768px) {
    body { padding-bottom: 72px; }
    .sticky-mobile-bar {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 68px;
        background: rgba(255, 255, 255, 0.94);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        border-top: 1px solid var(--color-border);
        z-index: 99;
        padding: 10px 16px;
        padding-bottom: calc(10px + env(safe-area-inset-bottom));
        gap: 12px;
        box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.05);
    }
    .sticky-mobile-bar a {
        flex: 1;
        font-size: 0.95rem;
        padding: 8px 12px;
    }
}

/* Exit-Intent Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; width: 100vw; height: 100vh;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.28s ease;
}

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

.modal-content {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    max-width: 480px;
    width: 90%;
    padding: 36px 28px;
    position: relative;
    box-shadow: var(--elevation-3);
    text-align: center;
    transform: scale(0.95);
    transition: transform 0.28s cubic-bezier(.34, 1.56, .64, 1);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 16px; right: 16px;
    background: none; border: none;
    font-size: 1.5rem; color: var(--color-text-muted);
    cursor: pointer;
    min-width: 44px; min-height: 44px;
}

.modal-close:hover { color: var(--color-text); }

.modal-title { font-size: 1.5rem; color: var(--color-text); margin-bottom: 12px; }
.modal-desc { font-size: 1rem; color: var(--color-text-muted); margin-bottom: 20px; }

.discount-box {
    background: var(--color-bg);
    border: 2px dashed var(--color-accent);
    border-radius: var(--radius-md);
    padding: 16px;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

.discount-code {
    font-size: 1.8rem;
    font-family: monospace;
    font-weight: 800;
    color: var(--color-accent);
    letter-spacing: 2px;
}

.copy-btn {
    background: var(--color-surface);
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-btn.copied {
    background: var(--color-success);
    color: #fff;
    border-color: var(--color-success);
}

/* Footer */
footer {
    background-color: #f1f5f9;
    border-top: 1px solid var(--color-border);
    padding: 40px 0 30px 0;
    margin-top: 60px;
}

.footer-content { display: flex; justify-content: center; gap: 24px; margin-bottom: 20px; flex-wrap: wrap; }
.footer-link { color: var(--color-text-muted); font-size: 0.95rem; font-weight: 500; }
.footer-link:hover { color: var(--color-accent); }
.copyright { text-align: center; color: var(--color-text-muted); font-size: 0.88rem; }

/* Legal Content Formatting */
.legal-content h1 { font-size: 2.2rem; margin-bottom: 24px; text-align: center; }
.legal-content h2 { font-size: 1.5rem; text-align: left; margin-top: 32px; margin-bottom: 12px; }
.legal-content ul { margin-left: 24px; margin-bottom: 16px; color: var(--color-text-muted); }
.legal-content li { margin-bottom: 6px; }

/* Responsive adjustments */
@media (max-width: 850px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: var(--color-surface);
        padding: 20px;
        box-shadow: var(--elevation-2);
        border-bottom: 1px solid var(--color-border);
    }
    .nav-menu.mobile-active { display: flex; }
    .mobile-toggle { display: block; }
}

@media (max-width: 900px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .hero-section { flex-direction: column; text-align: center; }
    .hero-left p { margin: 0 auto 30px auto; }
    .hero-btn-group { justify-content: center; }
    .trust-pills { justify-content: center; }
}

@media (max-width: 768px) {
    h1 { font-size: 2.4rem; }
    h2 { font-size: 1.75rem; }
    .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .footer-content { flex-direction: column; align-items: center; gap: 12px; }
}

@media (prefers-reduced-motion: reduce) {
    *, ::before, ::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}