@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,300;1,400&family=Geist:wght@300;400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Geist+Mono:wght@400;500&display=swap');


/* ─── Design Tokens ─── */
:root {
    --font-display: 'Plus Jakarta Sans', sans-serif;
    --font-body: 'Geist', sans-serif;
    --font-mono: 'Geist Mono', monospace;

    /* Light — Cool Blue-Gray Tech */
    --bg: #F4F6F9;
    --bg-card: #FFFFFF;
    --bg-card-hover: #F8FAFC;
    --surface: #EDF0F5;
    --border: #DDE2EC;
    --border-strong: #B8C2D4;
    --text-primary: #0D1526;
    --text-secondary: #5A6580;
    --text-tertiary: #8E9AB5;
    --accent: #0D1526;
    --accent-fg: #F4F6F9;
    --accent-blue: #2563EB;
    --accent-blue-muted: rgba(37, 99, 235, 0.08);
    --tag-bg: #EBF0FA;
    --tag-text: #3B5080;
    --step-line: #CBD5E8;
}

html.dark {
    --bg: #080C14;
    --bg-card: #0D1220;
    --bg-card-hover: #111827;
    --surface: #131B2E;
    --border: #1E2A42;
    --border-strong: #2D3F60;
    --text-primary: #E8EDF8;
    --text-secondary: #7A8BAA;
    --text-tertiary: #4A5570;
    --accent: #E8EDF8;
    --accent-fg: #080C14;
    --accent-blue: #3B82F6;
    --accent-blue-muted: rgba(59, 130, 246, 0.1);
    --tag-bg: #111E35;
    --tag-text: #7A9ACC;
    --step-line: #1E2A42;
}

/* ─── Base ─── */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    background-color: var(--bg);
    color: var(--text-primary);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

button {
    font: inherit;
    color: inherit;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    background-image: none;
    border: none;
}

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

/* ─── Noise Texture ─── */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.035'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
    opacity: 0.5;
}
html.dark body::before { opacity: 0.2; }

/* ─── Typography ─── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

/* ─── Grid Background ─── */
.grid-bg {
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 56px 56px;
}

/* ─── Tag ─── */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--tag-bg);
    color: var(--tag-text);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

/* ─── Buttons ─── */
.btn-primary,
a.btn-primary,
button.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-blue);
    color: #fff;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.875rem;
    letter-spacing: 0.01em;
    padding: 12px 24px;
    border-radius: 8px;
    border: none;
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
    appearance: none;
    transition: opacity 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 0 0 0 rgba(37,99,235,0);
}
.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(37,99,235,0.3);
}
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible {
    box-shadow: 0 0 0 3px var(--accent-blue-muted);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.875rem;
    padding: 12px 24px;
    border-radius: 8px;
    border: 1px solid var(--border-strong);
    transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.btn-secondary:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
    background: var(--surface);
}

/* ─── Card ─── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}
.card:hover {
    border-color: var(--border-strong);
    background: var(--bg-card-hover);
    box-shadow: 0 4px 24px rgba(13,21,38,0.06);
}
html.dark .card:hover {
    box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

/* ─── Step Number ─── */
.step-num {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent-blue);
    color: #fff;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 0 0 4px var(--accent-blue-muted);
}

/* ─── Logo Link (no hover effect) ─── */
.logo-link,
.logo-link:hover,
.logo-link:focus,
.logo-link:active,
.logo-link:visited {
    color: inherit;
    text-decoration: none;
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
}
.logo-link #nav-logo-text {
    color: var(--text-primary) !important;
    transition: none !important;
}
.logo-link svg {
    transition: none !important;
}

/* ─── Nav Link ─── */
.nav-link {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.15s ease;
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-blue);
    transition: width 0.2s ease;
}
.nav-link:hover { color: var(--text-primary); }
.nav-link:hover::after { width: 100%; }

/* ─── Lang Button ─── */
.lang-btn {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    color: var(--text-tertiary);
    transition: color 0.15s ease;
    padding: 2px 4px;
}
.lang-btn:hover,
.lang-btn.active { color: var(--text-primary); }

/* ─── Stat Number ─── */
.stat-num {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 2.4rem;
    color: var(--text-primary);
    letter-spacing: -0.04em;
    line-height: 1;
}

/* ─── Section Label ─── */
.section-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-tertiary);
}

/* ─── Icon Box ─── */
.icon-box {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--accent-blue-muted);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-blue);
    transition: background 0.2s, color 0.2s, border-color 0.2s;
    flex-shrink: 0;
}
.card:hover .icon-box {
    background: var(--accent-blue);
    color: #fff;
    border-color: var(--accent-blue);
}

/* ─── Form ─── */
.form-input {
    width: 100%;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 16px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
    outline: none;
    -webkit-appearance: none;
}
.form-input::placeholder { color: var(--text-tertiary); }
.form-input:focus {
    border-color: var(--accent-blue);
    background: var(--bg-card);
    box-shadow: 0 0 0 3px var(--accent-blue-muted);
}

.form-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-tertiary);
    margin-bottom: 8px;
}

.contact-feedback {
    font-size: 0.875rem;
    line-height: 1.5;
    padding: 10px 12px;
    border-radius: 8px;
}
.contact-feedback--success {
    color: #166534;
    background: rgba(22, 101, 52, 0.08);
    border: 1px solid rgba(22, 101, 52, 0.15);
}
.contact-feedback--error {
    color: #991b1b;
    background: rgba(153, 27, 27, 0.08);
    border: 1px solid rgba(153, 27, 27, 0.15);
}
html.dark .contact-feedback--success {
    color: #86efac;
    background: rgba(134, 239, 172, 0.08);
    border-color: rgba(134, 239, 172, 0.15);
}
html.dark .contact-feedback--error {
    color: #fca5a5;
    background: rgba(252, 165, 165, 0.08);
    border-color: rgba(252, 165, 165, 0.15);
}

/* ─── Footer ─── */
.footer-bg {
    background: var(--surface);
    border-top: 1px solid var(--border);
}

/* ─── Blockquote ─── */
.blockquote {
    border-left: 2px solid var(--accent-blue);
    padding-left: 24px;
    font-style: italic;
    color: var(--text-secondary);
}

/* ─── Process Step (vertical) ─── */
.process-step {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 0 28px;
    position: relative;
}
.process-step-line {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}
.process-step-line::after {
    content: '';
    flex: 1;
    width: 1px;
    background: var(--step-line);
    margin-top: 8px;
}
.process-step:last-child .process-step-line::after {
    display: none;
}
.process-step-content {
    padding-bottom: 48px;
}
.process-step:last-child .process-step-content {
    padding-bottom: 0;
}

/* ─── Blue Accent Dot ─── */
.blue-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-blue);
    display: inline-block;
    margin-right: 6px;
    vertical-align: middle;
}

/* ─── Hero Gradient Text ─── */
.gradient-text {
    background: linear-gradient(90deg, #1D4ED8 0%, #0EA5E9 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ─── Vectsee Logo Text Styling ─── */
#nav-logo-text {
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    letter-spacing: -0.03em;
    transition: none;
}

#footer-logo-text {
    background: linear-gradient(90deg, var(--text-primary) 0%, var(--accent-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    letter-spacing: -0.03em;
}

/* ─── Hide ICP in English ─── */
html[lang="en"] [data-key="footer.icp"] { display: none; }

/* ─── Mobile Navigation ─── */
.nav-mobile-menu {
    display: none;
    flex-direction: column;
    gap: 4px;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--surface);
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s ease;
    flex-shrink: 0;
}
.nav-mobile-menu:hover {
    border-color: var(--border-strong);
}
.nav-mobile-menu span {
    display: block;
    width: 14px;
    height: 1.5px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all 0.25s ease;
    transform-origin: center;
}
.nav-mobile-menu.open span:nth-child(1) {
    transform: translateY(5.5px) rotate(45deg);
}
.nav-mobile-menu.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.nav-mobile-menu.open span:nth-child(3) {
    transform: translateY(-5.5px) rotate(-45deg);
}

/* Mobile Dropdown Menu */
.nav-mobile-dropdown {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    z-index: 49;
    padding: 12px 0;
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}
.nav-mobile-dropdown.open {
    display: block;
}
.nav-mobile-dropdown a {
    display: block;
    padding: 12px 24px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.15s, background 0.15s;
}
.nav-mobile-dropdown a:hover {
    color: var(--text-primary);
    background: var(--surface);
}

/* ─── Responsive Breakpoints ─── */
@media (max-width: 768px) {
    /* Nav */
    .nav-mobile-menu { display: flex; }
    .nav-desktop-links { display: none !important; }

    /* Hero */
    .hero-container {
        padding-top: 100px !important;
        padding-bottom: 64px !important;
    }
    .hero-inner {
        padding: 0 20px !important;
    }
    .hero-stats {
        grid-template-columns: repeat(3, 1fr) !important;
        width: 100% !important;
        gap: 0 !important;
    }
    .hero-stats > div:first-child {
        padding-right: 16px !important;
    }
    .hero-stats > div:nth-child(2) {
        padding: 0 16px !important;
    }
    .hero-stats > div:last-child {
        padding-left: 16px !important;
    }
    .stat-num {
        font-size: 1.6rem !important;
    }
    .hero-buttons {
        flex-direction: column !important;
        gap: 10px !important;
    }
    .hero-buttons a {
        width: 100% !important;
        justify-content: center !important;
    }

    /* Sections */
    .section-inner {
        padding: 0 20px !important;
    }
    section, header {
        padding-left: 0 !important;
        padding-right: 0 !important;
    }

    /* Features */
    .features-header {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 12px !important;
    }

    /* Process */
    .process-header-grid {
        grid-template-columns: 1fr !important;
        gap: 16px !important;
    }
    .process-step {
        grid-template-columns: 36px 1fr !important;
        gap: 0 16px !important;
    }

    /* CTA Band */
    .cta-band-inner {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 20px !important;
    }
    .cta-band-inner a {
        width: 100% !important;
        justify-content: center !important;
    }

    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr !important;
        gap: 40px !important;
        padding: 32px 20px !important;
    }
    .form-row {
        grid-template-columns: 1fr !important;
    }

    /* About / Tech */
    .about-grid,
    .tech-grid {
        grid-template-columns: 1fr !important;
        gap: 20px !important;
    }

    /* Footer */
    .footer-inner {
        padding: 48px 20px !important;
    }
    .footer-grid {
        gap: 28px !important;
    }
    .footer-bottom {
        flex-direction: column !important;
        align-items: flex-start !important;
        gap: 8px !important;
    }

    /* General padding reduction */
    .page-section-padding {
        padding: 64px 0 !important;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        grid-template-columns: repeat(3, 1fr) !important;
    }
    .stat-num {
        font-size: 1.4rem !important;
    }
    .section-label {
        font-size: 0.6rem !important;
    }
    .hero-stats > div:first-child {
        padding-right: 10px !important;
    }
    .hero-stats > div:nth-child(2) {
        padding: 0 10px !important;
    }
    .hero-stats > div:last-child {
        padding-left: 10px !important;
    }
}

/* ─── Selection ─── */
::selection {
    background: var(--accent-blue);
    color: #fff;
}

/* ─── Scrollbar ─── */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* ─── SSR: language blocks ─── */
.lang-block-zh { display: none; }
html[lang="zh"] .lang-block-en { display: none; }
html[lang="zh"] .lang-block-zh { display: block; }

/* ─── Site nav / footer layout ─── */
.site-nav {
    background: color-mix(in srgb, var(--bg-card) 92%, transparent);
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(8px);
    position: fixed;
    width: 100%;
    z-index: 50;
}
.site-nav-inner {
    max-width: 80rem;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 4rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.site-nav-controls {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.theme-toggle {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.15s ease;
}
.theme-toggle:hover {
    border-color: var(--border-strong);
    color: var(--text-primary);
}
.theme-icon-dark { display: none; }
html.dark .theme-icon-dark { display: block; }
html.dark .theme-icon-light { display: none; }
.lang-switch {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 3px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
}
.lang-switch .lang-btn {
    padding: 3px 8px;
    border-radius: 4px;
    border: none;
    background: transparent;
    cursor: pointer;
}
.footer-grid {
    display: grid;
    grid-template-columns: 5fr 1fr 3fr 3fr;
    gap: 3rem;
    margin-bottom: 3rem;
}
.footer-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.15s;
}
.footer-link:hover { color: var(--text-primary); }
.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
    justify-content: space-between;
}
@media (min-width: 768px) {
    .footer-bottom { flex-direction: row; }
}

/* ─── Blog ─── */
.blog-index { max-width: 920px; margin: 0 auto; padding: 120px 32px 96px; }
.blog-index h1 {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0 0 48px;
}
.blog-featured-label {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 20px;
    display: block;
}
.blog-featured {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 32px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 8px;
}
.blog-featured-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 120px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: var(--surface);
    font-size: 2rem;
    color: var(--text-tertiary);
}
.blog-featured h2 {
    font-family: var(--font-display);
    font-size: clamp(1.4rem, 3vw, 1.85rem);
    font-weight: 700;
    line-height: 1.25;
    margin: 0 0 16px;
}
.blog-featured h2 a { color: var(--text-primary); text-decoration: none; }
.blog-featured h2 a:hover { text-decoration: underline; }
.blog-featured-summary {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin: 0;
}
.blog-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 24px;
    padding: 22px 0;
    border-bottom: 1px solid var(--border);
    text-decoration: none;
    color: inherit;
}
.blog-row:hover .blog-row-title { text-decoration: underline; }
.blog-row-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}
.blog-row time {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
}
.blog-post { max-width: 720px; margin: 0 auto; padding: 120px 32px 96px; }
.blog-back {
    display: inline-block;
    margin-bottom: 24px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
}
.blog-back:hover { color: var(--text-primary); }
.blog-post h1 {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    margin: 12px 0;
    line-height: 1.15;
}
.blog-meta { color: var(--text-secondary); font-size: 0.875rem; margin-bottom: 32px; }
.blog-body { line-height: 1.8; color: var(--text-secondary); }
.blog-body p { margin-bottom: 16px; }
.blog-cover { width: 100%; max-height: 420px; object-fit: cover; border-radius: 14px; margin: 8px 0 28px; }
.blog-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 20px; }
.blog-tag { display: inline-flex; padding: 4px 10px; color: var(--text-secondary); background: var(--bg-muted, #f3f5f8); border-radius: 999px; font-size: 12px; }
.blog-featured-visual-link {
    display: block;
    min-height: 120px;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    background: var(--surface);
}
.blog-featured-visual-link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 120px;
}
.markdown-body h2, .markdown-body h3 { color: var(--text-primary); margin: 1.4em 0 0.6em; line-height: 1.3; }
.markdown-body ul, .markdown-body ol { padding-left: 22px; margin: 0 0 16px; }
.markdown-body img { max-width: 100%; height: auto; border-radius: 10px; margin: 8px 0 18px; }
.markdown-body blockquote { margin: 0 0 16px; padding: 12px 16px; border-left: 4px solid var(--border); background: var(--bg-muted, #f6f8fc); }
.markdown-body pre { overflow-x: auto; margin: 0 0 16px; padding: 16px; border-radius: 10px; background: #111827; color: #e5e7eb; }
.markdown-body :not(pre) > code { padding: 2px 6px; border-radius: 4px; background: var(--bg-muted, #eef2f7); font-size: 0.9em; }
.markdown-body table { width: 100%; margin: 0 0 16px; border-collapse: collapse; }
.markdown-body th, .markdown-body td { padding: 10px 12px; border: 1px solid var(--border); text-align: left; }
@media (max-width: 640px) {
    .blog-featured { grid-template-columns: 1fr; }
    .blog-row { flex-direction: column; gap: 8px; align-items: flex-start; }
}