/* ===== CSS Reset & Variables ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #0B3B60;
    --primary-light: #145D91;
    --primary-dark: #061E30;
    --accent: #2563EB;
    --accent-soft: #3B82F6;
    --accent-gradient: linear-gradient(135deg, #0B3B60 0%, #1E40AF 50%, #4338CA 100%);
    --bg-white: #FFFFFF;
    --bg-light: #F7F8FA;
    --bg-gray: #F0F2F5;
    --bg-off-white: #FAFBFC;
    --text-primary: #0A1628;
    --text-secondary: #4A5568;
    --text-muted: #8899AA;
    --text-light: #AAB5C2;
    --border: #E4E7EB;
    --border-light: #F0F2F5;
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.03);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.05), 0 1px 3px rgba(0,0,0,0.04);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.06), 0 2px 8px rgba(0,0,0,0.03);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.08), 0 4px 16px rgba(0,0,0,0.04);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --max-width: 1200px;
    --nav-height: 72px;
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    background: var(--bg-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1 { font-size: 3.25rem; font-weight: 800; letter-spacing: -0.025em; line-height: 1.15; }
h2 { font-size: 2.25rem; font-weight: 700; letter-spacing: -0.015em; line-height: 1.25; }
h3 { font-size: 1.5rem; font-weight: 600; line-height: 1.3; }
h4 { font-size: 1.125rem; font-weight: 600; line-height: 1.35; }
p { color: var(--text-secondary); max-width: 680px; }

@media (max-width: 768px) {
    h1 { font-size: 2.125rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
}

/* ===== Navigation ===== */
.nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--nav-height);
    background: rgba(248,250,253,0.82);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid rgba(0,0,0,0.04);
    transition: background 0.3s, box-shadow 0.3s;
}
.nav.scrolled { box-shadow: var(--shadow-sm); background: rgba(248,250,253,0.92); }
.nav-inner {
    max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
    height: 100%; display: flex; align-items: center; justify-content: flex-start; gap: 48px;
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.nav-logo-icon {
    width: 40px; height: 40px;
    display: flex; align-items: center; justify-content: center;
}
.nav-logo-icon img { width: 100%; height: 100%; object-fit: contain; display: block; }
.nav-logo-text { font-size: 1.0625rem; font-weight: 700; color: var(--text-primary); display: block; line-height: 1.2; }
.nav-logo-sub { font-size: 0.75rem; color: var(--text-muted); display: block; line-height: 1.2; letter-spacing: 0.02em; }

.nav-links { display: flex; align-items: center; gap: 36px; list-style: none; flex: 1; justify-content: flex-end; }
.nav-links a {
    text-decoration: none; color: var(--text-secondary); font-size: 0.9375rem;
    font-weight: 500; transition: color 0.2s; position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--text-primary); margin: 5px 0; transition: 0.3s; border-radius: 2px; }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

@media (max-width: 768px) {
    .nav { background: #EBF0F6; border-bottom: none; }
    .nav.scrolled { background: #EBF0F6; box-shadow: var(--shadow-sm); }
    .nav-toggle { display: block; margin-left: auto; }
    .nav-inner { gap: 0; }
    .nav-links {
        position: fixed; top: var(--nav-height); left: 0; right: 0;
        background: #EBF0F6;
        flex-direction: column; gap: 0; padding: 16px 24px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%); transition: transform 0.3s ease;
        box-shadow: var(--shadow-lg); visibility: hidden;
    }
    .nav-links.open { transform: translateY(0); visibility: visible; }
    .nav-links a { padding: 14px 0; display: block; border-bottom: 1px solid var(--border-light); }
    .nav-links a:last-child { border-bottom: none; }
}

/* ===== Sections ===== */
.section { padding: 112px 24px; }
.section-dark { background: var(--primary-dark); color: #fff; }
.section-dark p { color: rgba(255,255,255,0.65); }
.section-gray { background: var(--bg-light); }
.section-inner { max-width: var(--max-width); margin: 0 auto; }

.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
    display: inline-block; padding: 6px 18px; border-radius: 50px;
    background: rgba(11,59,96,0.06); color: var(--primary);
    font-size: 0.8125rem; font-weight: 600; margin-bottom: 20px; letter-spacing: 0.02em;
}
.section-dark .section-tag { background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.85); }
.section-header h2 { margin-bottom: 12px; }
.section-header p { margin: 0 auto; color: var(--text-muted); }

.page-hero .section-header h2 { color: #fff; }
.page-hero .section-header p { color: rgba(255,255,255,0.6); margin: 0 auto; }

@media (max-width: 768px) {
    .section { padding: 72px 16px; }
    .section-header { margin-bottom: 40px; }
}

/* ===== Hero ===== */
.hero {
    padding: calc(var(--nav-height) + 96px) 24px 120px;
    background: linear-gradient(160deg, #020B1A 0%, #071D3A 30%, #0F3060 60%, #184880 100%);
    color: #fff; position: relative; overflow: hidden;
}
.hero::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 50% 40% at 25% 35%, rgba(37,99,235,0.08) 0%, transparent 55%),
        radial-gradient(ellipse 40% 35% at 75% 65%, rgba(99,102,241,0.06) 0%, transparent 55%),
        radial-gradient(circle at 60% 20%, rgba(37,99,235,0.03) 0%, transparent 40%);
    pointer-events: none;
}
.hero::after {
    content: ''; position: absolute; right: -10%; top: 20%;
    width: 500px; height: 500px; border-radius: 50%;
    background: radial-gradient(circle, rgba(99,102,241,0.1) 0%, transparent 70%);
    pointer-events: none;
}
.hero-inner {
    max-width: var(--max-width); margin: 0 auto;
    display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
    position: relative; z-index: 1;
}
.hero-content h1 { margin-bottom: 20px; line-height: 1.25; }
.hero-content h1 span { background: linear-gradient(135deg, #60A5FA, #A78BFA); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-content p { font-size: 1.125rem; color: rgba(255,255,255,0.75); margin-bottom: 32px; max-width: 540px; line-height: 1.8; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px; border-radius: 50px; font-size: 1rem; font-weight: 600;
    text-decoration: none; cursor: pointer; border: none;
    transition: all 0.2s;
}
.btn-primary { background: #fff; color: var(--primary); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,0.4); }
.btn-outline:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.7); }

.hero-visual {
    display: flex; align-items: center; justify-content: center;
}
.hero-img {
    width: 100%; max-width: 520px; height: auto;
    border-radius: 10px;
    border: 1px solid rgba(37,99,235,0.12);
    box-shadow: 0 12px 40px rgba(37,99,235,0.10), 0 4px 12px rgba(15,38,72,0.08);
    mask-image: radial-gradient(ellipse 85% 85% at 50% 50%, rgba(0,0,0,1) 60%, rgba(0,0,0,0) 100%);
    -webkit-mask-image: radial-gradient(ellipse 85% 85% at 50% 50%, rgba(0,0,0,1) 60%, rgba(0,0,0,0) 100%);
}

/* Page hero (shorter, used on solutions / about) */
.page-hero {
    padding: calc(var(--nav-height) + 48px) 24px 72px;
    background: linear-gradient(160deg, #020B1A 0%, #071D3A 40%, #0F3060 100%);
    color: #fff; position: relative; overflow: hidden; text-align: center;
}
.page-hero::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse 50% 40% at 50% 40%, rgba(37,99,235,0.06) 0%, transparent 60%);
    pointer-events: none;
}
.page-hero .section-inner { position: relative; z-index: 1; }
.page-hero h1 { margin-bottom: 12px; }
.page-hero h1 span { background: linear-gradient(135deg, #60A5FA, #A78BFA); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.page-hero .page-hero-desc { font-size: 1.0625rem; color: rgba(255,255,255,0.6); max-width: 600px; margin: 0 auto; }

@media (max-width: 768px) {
    .hero { padding: calc(var(--nav-height) + 40px) 16px 60px; }
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero-content h1 { font-size: 1.75rem; }
    .page-hero { padding: calc(var(--nav-height) + 32px) 16px 48px; }
    .page-hero h1 { font-size: 1.75rem; }
    .page-wanwu .hero::before { display: none; }
    .page-wanwu .hero { background: #EBF0F6 !important; }
}

/* ===== Stats Bar ===== */
.stats-bar {
    max-width: var(--max-width); margin: -40px auto 0; padding: 0 24px;
    position: relative; z-index: 10;
}
.stats-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
    background: #fff; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); overflow: hidden;
}
.stat-item { padding: 32px 24px; text-align: center; border-right: 1px solid var(--border-light); }
.stat-item:last-child { border-right: none; }
.stat-value { font-size: 2.25rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
.stat-label { font-size: 0.875rem; color: var(--text-muted); margin-top: 4px; }

@media (max-width: 768px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-item { padding: 20px 12px; }
    .stat-item:nth-child(2) { border-right: none; }
    .stat-value { font-size: 1.75rem; }
}

/* ===== Product Section ===== */
.product-intro {
    display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 60px;
}
.product-intro-text h2 { margin-bottom: 16px; }
.product-intro-text p { margin-bottom: 16px; }
.product-intro-visual {
    background: var(--accent-gradient); border-radius: var(--radius-lg);
    padding: 40px; color: #fff; text-align: center;
    box-shadow: var(--shadow-lg);
}
.product-intro-visual .big-num { font-size: 4rem; font-weight: 800; line-height: 1; }
.product-intro-visual .big-label { font-size: 1.25rem; font-weight: 600; margin-top: 8px; opacity: 0.9; }

.capability-grid {
    display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
}
.capability-card {
    background: #fff; border-radius: var(--radius-md); padding: 28px 20px;
    border: 1px solid var(--border); transition: all 0.2s;
    cursor: default;
}
.capability-card:hover {
    transform: translateY(-4px); box-shadow: var(--shadow-md);
    border-color: var(--accent);
}
.capability-card .icon {
    width: 48px; height: 48px; border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 16px; font-size: 1.5rem;
}
.capability-card .icon.blue { background: rgba(59,130,246,0.1); color: #3B82F6; }
.capability-card .icon.purple { background: rgba(99,102,241,0.1); color: #6366F1; }
.capability-card .icon.green { background: rgba(16,185,129,0.1); color: #10B981; }
.capability-card .icon.orange { background: rgba(249,115,22,0.1); color: #F97316; }
.capability-card .icon.teal { background: rgba(20,184,166,0.1); color: #14B8A6; }
.capability-card h4 { margin-bottom: 8px; }
.capability-card p { font-size: 0.875rem; line-height: 1.6; }

@media (max-width: 1024px) {
    .capability-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    .product-intro { grid-template-columns: 1fr; gap: 32px; }
    .capability-grid { grid-template-columns: 1fr; }
    .product-intro-visual { padding: 32px; }
    .product-intro-visual .big-num { font-size: 3rem; }
}

/* ===== Advantage Cards ===== */
.advantage-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 60px;
}
.advantage-card {
    background: #fff; border-radius: var(--radius-md); padding: 32px 28px;
    border: 1px solid var(--border); box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s;
}
.advantage-card:hover { box-shadow: var(--shadow-md); }
.advantage-card .adv-icon { font-size: 2rem; margin-bottom: 16px; }
.advantage-card h4 { margin-bottom: 8px; }
.advantage-card p { font-size: 0.9375rem; }

@media (max-width: 768px) {
    .advantage-grid { grid-template-columns: 1fr; }
}

/* ===== Feature Grid ===== */
.feature-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; margin-top: 40px;
}
.feature-item {
    display: flex; gap: 12px; align-items: flex-start;
    padding: 16px; border-radius: var(--radius-sm); background: var(--bg-gray);
    transition: background 0.2s;
}
.feature-item:hover { background: rgba(59,130,246,0.06); }
.feature-check { color: var(--accent); font-weight: 700; font-size: 1.125rem; flex-shrink: 0; }
.feature-item h4 { font-size: 0.9375rem; }
.feature-item p { font-size: 0.8125rem; margin-top: 2px; }

@media (max-width: 768px) {
    .feature-grid { grid-template-columns: 1fr; }
}

/* ===== Solutions ===== */
.solution-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.solution-card {
    background: #fff; border-radius: var(--radius-xl); overflow: hidden;
    border: 1px solid var(--border); box-shadow: var(--shadow-xs);
    transition: all 0.3s;
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.solution-card-img {
    height: 180px; display: flex; align-items: center; justify-content: center;
    font-size: 3rem; position: relative; overflow: hidden;
}
.solution-card-img.s1 { background: linear-gradient(135deg, #EFF6FF, #DBEAFE); }
.solution-card-img.s2 { background: linear-gradient(135deg, #EEF2FF, #E0E7FF); }
.solution-card-img.s3 { background: linear-gradient(135deg, #F0FDF4, #DCFCE7); }
.solution-card-body { padding: 24px; }
.solution-card-body h3 { margin-bottom: 8px; font-size: 1.25rem; }
.solution-card-body p { font-size: 0.875rem; margin-bottom: 16px; }
.solution-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.solution-tag {
    padding: 4px 10px; border-radius: 50px; font-size: 0.75rem; font-weight: 500;
    background: var(--bg-gray); color: var(--text-secondary);
}

@media (max-width: 768px) {
    .solution-grid { grid-template-columns: 1fr; }
}

/* ===== Solution Detail ===== */
.solution-detail {
    display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-bottom: 48px; align-items: start;
}
.solution-detail:nth-child(even) .solution-detail-visual { order: 1; }
.solution-detail:nth-child(even) .solution-detail-text { order: 2; }
@media (max-width: 768px) {
    .solution-detail { grid-template-columns: 1fr; }
    .solution-detail:nth-child(even) .solution-detail-visual,
    .solution-detail:nth-child(even) .solution-detail-text { order: unset; }
}
.solution-detail-visual {
    background: var(--bg-gray); border-radius: var(--radius-lg);
    padding: 32px; text-align: center; font-size: 4rem;
    min-height: 240px; display: flex; align-items: center; justify-content: center;
    border: 1px solid var(--border);
}
.solution-detail-text h3 { margin-bottom: 12px; }
.solution-detail-text p { margin-bottom: 12px; }
.solution-detail-bullets { list-style: none; }
.solution-detail-bullets li {
    padding: 8px 0 8px 24px; position: relative; color: var(--text-secondary); font-size: 0.9375rem;
}
.solution-detail-bullets li::before {
    content: ''; position: absolute; left: 0; top: 14px;
    width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
}

/* Solution value grid */
.solution-value-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px;
}
.solution-value-card {
    background: #fff; border-radius: var(--radius-md); padding: 24px;
    border: 1px solid var(--border); box-shadow: var(--shadow-sm); text-align: center;
}
.solution-value-card .sv-num { font-size: 2rem; font-weight: 800; color: var(--primary); }
.solution-value-card .sv-label { font-size: 0.875rem; color: var(--text-muted); margin-top: 4px; }
@media (max-width: 768px) {
    .solution-value-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===== About Section ===== */
.about-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start;
}
.about-text p { margin-bottom: 16px; }

.timeline { position: relative; padding-left: 24px; border-left: 2px solid var(--border); }
.timeline-item { margin-bottom: 24px; position: relative; }
.timeline-item::before {
    content: ''; position: absolute; left: -30px; top: 6px;
    width: 10px; height: 10px; border-radius: 50%;
    background: var(--accent); border: 2px solid #fff;
}
.timeline-year { font-size: 0.8125rem; color: var(--accent); font-weight: 700; margin-bottom: 4px; }
.timeline-text { font-size: 0.9375rem; color: var(--text-secondary); }

.cert-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; margin-top: 40px;
}
.cert-card {
    background: #fff; border-radius: var(--radius-lg); padding: 24px 16px;
    text-align: center; border: 1px solid var(--border); box-shadow: var(--shadow-xs);
    font-size: 0.8125rem; color: var(--text-secondary);
    transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
}
.cert-card:hover { box-shadow: var(--shadow-md); border-color: rgba(37,99,235,0.15); transform: translateY(-2px); }
.cert-card .cert-icon { font-size: 1.75rem; margin-bottom: 8px; }

@media (max-width: 768px) {
    .about-grid { grid-template-columns: 1fr; gap: 32px; }
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Contact ===== */
.contact-grid {
    display: grid; grid-template-columns: 3fr 2fr; gap: 48px;
    background: #fff; border-radius: var(--radius-lg); overflow: hidden;
    border: 1px solid var(--border); box-shadow: var(--shadow-md);
}
.contact-info { padding: 48px; }
.contact-info h3 { margin-bottom: 24px; }
.contact-item { display: flex; gap: 12px; margin-bottom: 16px; align-items: flex-start; }
.contact-item .ci-icon { font-size: 1.25rem; color: var(--accent); flex-shrink: 0; width: 24px; }
.contact-item .ci-text { font-size: 0.9375rem; color: var(--text-secondary); }
.contact-map {
    background: var(--bg-gray); display: flex; align-items: center; justify-content: center;
    color: var(--text-muted); font-size: 0.9375rem;
}

@media (max-width: 768px) {
    .contact-grid { grid-template-columns: 1fr; }
    .contact-info { padding: 32px 24px; }
    .contact-map { min-height: 200px; }
}

/* ===== Footer ===== */
.footer {
    background: #060E1A; color: rgba(255,255,255,0.6);
    padding: 64px 24px 36px;
}
.footer-inner { max-width: var(--max-width); margin: 0 auto; }
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px;
}
.footer-brand h3 { color: #fff; margin-bottom: 8px; }
.footer-brand p { font-size: 0.875rem; color: rgba(255,255,255,0.6); }
.footer-col h4 { color: #fff; margin-bottom: 16px; font-size: 0.9375rem; }
.footer-col a {
    display: block; color: rgba(255,255,255,0.6); text-decoration: none;
    font-size: 0.875rem; margin-bottom: 8px; transition: color 0.2s;
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px;
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 16px;
}
.footer-bottom p { font-size: 0.8125rem; color: rgba(255,255,255,0.5); }
.footer-bottom a { color: rgba(255,255,255,0.6); text-decoration: none; }
.footer-bottom a:hover { color: #fff; }

@media (max-width: 768px) {
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

/* ===== Scroll to Top ===== */
.scroll-top {
    position: fixed; bottom: 32px; right: 32px; z-index: 999;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--primary); color: #fff; border: none; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.25rem; box-shadow: var(--shadow-md);
    opacity: 0; transform: translateY(20px); transition: all 0.3s;
    pointer-events: none;
}
.scroll-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.scroll-top:hover { background: var(--primary-light); transform: translateY(-2px); }

/* ===== Architecture Layers ===== */
.arch-layers { margin-top: 48px; }
.arch-layer {
    display: grid; grid-template-columns: 120px 1fr; gap: 24px;
    padding: 24px 0; border-bottom: 1px solid var(--border-light); align-items: start;
}
.arch-layer:last-child { border-bottom: none; }
.arch-layer-label {
    font-size: 0.875rem; font-weight: 700; color: var(--accent);
    padding: 6px 12px; border-radius: var(--radius-sm);
    background: rgba(59,130,246,0.06); text-align: center;
}
.arch-layer-content h4 { margin-bottom: 6px; }
.arch-layer-content p { font-size: 0.9375rem; margin-bottom: 0; }
.arch-layer-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 8px; }
.arch-tag {
    padding: 3px 10px; border-radius: 50px; font-size: 0.75rem;
    background: var(--bg-gray); color: var(--text-secondary); font-weight: 500;
}
@media (max-width: 768px) {
    .arch-layer { grid-template-columns: 1fr; gap: 8px; }
}

/* ===== Agent Detail (alternating) ===== */
.agent-detail {
    display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
    padding: 48px 0; border-bottom: 1px solid var(--border-light);
}
.agent-detail:last-child { border-bottom: none; padding-bottom: 0; }
.agent-detail:nth-child(even) .agent-visual { order: -1; }
.agent-visual {
    background: var(--bg-gray); border-radius: var(--radius-lg);
    min-height: 280px; display: flex; align-items: center; justify-content: center;
    font-size: 4rem; border: 1px solid var(--border);
}
.agent-info h3 { margin-bottom: 8px; font-size: 1.375rem; }
.agent-info .agent-tagline {
    display: inline-block; padding: 3px 12px; border-radius: 50px;
    font-size: 0.8125rem; font-weight: 600; margin-bottom: 12px;
}
.agent-info .agent-tagline.blue { background: rgba(59,130,246,0.1); color: #3B82F6; }
.agent-info .agent-tagline.purple { background: rgba(99,102,241,0.1); color: #6366F1; }
.agent-info .agent-tagline.green { background: rgba(16,185,129,0.1); color: #10B981; }
.agent-info .agent-tagline.orange { background: rgba(249,115,22,0.1); color: #F97316; }
.agent-info .agent-tagline.teal { background: rgba(20,184,166,0.1); color: #14B8A6; }
.agent-info p { font-size: 0.9375rem; margin-bottom: 12px; }
.agent-points { list-style: none; }
.agent-points li {
    font-size: 0.875rem; color: var(--text-secondary); padding: 6px 0 6px 20px;
    position: relative;
}
.agent-points li::before {
    content: ''; position: absolute; left: 0; top: 13px;
    width: 6px; height: 6px; border-radius: 50%; background: var(--accent);
}
@media (max-width: 768px) {
    .agent-detail { grid-template-columns: 1fr; gap: 24px; padding: 32px 0; }
    .agent-detail:nth-child(even) .agent-visual { order: unset; }
    .agent-visual { min-height: 200px; font-size: 3rem; }
}

/* ===== Agent 5-Column Card Grid ===== */
.agent-grid-5 {
    display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
}
.agent-card-v {
    background: #fff; border-radius: var(--radius-lg); padding: 32px 24px;
    border: 1px solid var(--border); box-shadow: var(--shadow-xs);
    transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
    display: flex; flex-direction: column;
}
.agent-card-v:hover { box-shadow: var(--shadow-md); border-color: rgba(37,99,235,0.15); transform: translateY(-2px); }
.agent-card-v .ac-title {
    font-size: 1rem; font-weight: 700; margin-bottom: 6px; color: var(--text-primary);
}
.agent-card-v .ac-sub {
    font-size: 0.8125rem; margin-bottom: 14px; padding-bottom: 14px; font-weight: 500;
    border-bottom: 1px solid var(--border-light);
}
.agent-card-v .ac-sub.blue { color: #2563EB; }
.agent-card-v .ac-sub.purple { color: #6366F1; }
.agent-card-v .ac-sub.green { color: #059669; }
.agent-card-v .ac-sub.orange { color: #EA580C; }
.agent-card-v .ac-sub.teal { color: #0D9488; }
.agent-card-v .ac-section { margin-bottom: 12px; }
.agent-card-v .ac-section-label {
    font-size: 0.6875rem; font-weight: 700; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 6px;
}
.agent-card-v .ac-list {
    list-style: none; font-size: 0.8125rem; color: var(--text-secondary); line-height: 1.8;
}
.agent-card-v .ac-list li { padding: 1px 0; }
.agent-card-v .ac-flow {
    font-size: 0.8125rem; color: var(--text-secondary); line-height: 1.9;
}
.agent-card-v .ac-value {
    margin-top: auto; padding: 8px 12px; border-radius: var(--radius-sm);
    font-size: 0.75rem; font-weight: 600; text-align: center;
}
.agent-card-v .ac-value.blue { background: rgba(59,130,246,0.06); color: #3B82F6; }
.agent-card-v .ac-value.purple { background: rgba(99,102,241,0.06); color: #6366F1; }
.agent-card-v .ac-value.green { background: rgba(16,185,129,0.06); color: #10B981; }
.agent-card-v .ac-value.orange { background: rgba(249,115,22,0.06); color: #F97316; }
.agent-card-v .ac-value.teal { background: rgba(20,184,166,0.06); color: #14B8A6; }
.agent-card-v .ac-tags {
    display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px;
}
.agent-card-v .ac-tag {
    padding: 2px 8px; border-radius: 50px; font-size: 0.6875rem;
    background: var(--bg-gray); color: var(--text-secondary);
}
/* Agent card: colored top bar + icon + keyword chips */
.agent-card-v { position: relative; overflow: hidden; }
.ac-bar {
    position: absolute; top: 0; left: 0; right: 0;
    height: 4px; border-radius: 0;
}
.ac-icon-wrap {
    width: 44px; height: 44px; display: flex; align-items: center;
    justify-content: center; margin-bottom: 14px;
    border-radius: 10px;
}
.ac-icon-wrap .lucide { width: 24px; height: 24px; }
.ac-tag-row {
    display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 14px;
    border-top: 1px solid var(--border-light);
}
.ac-tag-chip {
    display: inline-flex; padding: 3px 10px; border-radius: 50px;
    font-size: 0.6875rem; font-weight: 500;
}
.ac-tag-chip.bc-blue { background: rgba(37,99,235,0.06); color: #2563EB; }
.ac-tag-chip.bc-purple { background: rgba(99,102,241,0.06); color: #6366F1; }
.ac-tag-chip.bc-green { background: rgba(5,150,105,0.06); color: #059669; }
.ac-tag-chip.bc-orange { background: rgba(234,88,12,0.06); color: #EA580C; }
.ac-tag-chip.bc-teal { background: rgba(13,148,136,0.06); color: #0D9488; }

/* Gap cards: fracture line tension */
.gap-fracture {
    position: relative; padding-top: 20px;
}
.gap-fracture::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0;
    height: 3px; border-radius: 2px;
    background: linear-gradient(90deg, #EF4444, #F87171, #FCA5A5, transparent 80%);
}
.gap-bg-tension { background: #FEF2F2 !important; border-color: #FECACA !important; }

@media (max-width: 1024px) {
    .agent-grid-5 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .agent-grid-5 { grid-template-columns: 1fr; }
}

/* ===== Ontology 4-Pillar Grid ===== */
.ontology-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px;
}
.ontology-card {
    background: #fff; border-radius: var(--radius-md); padding: 28px 20px;
    border: 1px solid var(--border); box-shadow: var(--shadow-sm);
    text-align: center; transition: box-shadow 0.2s;
}
.ontology-card:hover { box-shadow: var(--shadow-md); }
.ontology-card .ont-num {
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--accent-gradient); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 1rem; margin: 0 auto 12px;
}
.ontology-card h4 { font-size: 1rem; margin-bottom: 8px; }
.ontology-card p { font-size: 0.8125rem; line-height: 1.6; }
@media (max-width: 768px) {
    .ontology-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Chapter Divider ===== */
.chapter-divider {
    text-align: center; padding: 40px 0 20px;
}
.chapter-num {
    font-size: 0.8125rem; font-weight: 700; color: var(--accent);
    letter-spacing: 0.1em; margin-bottom: 8px;
}
.chapter-title {
    font-size: 1.75rem; font-weight: 700; color: var(--text-primary);
}

/* ===== Pain Points Grid ===== */
.pain-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.pain-card {
    background: #fff; border-radius: var(--radius-md); padding: 28px;
    border: 1px solid var(--border); box-shadow: var(--shadow-sm);
}
.pain-card .pain-icon { font-size: 1.75rem; margin-bottom: 12px; }
.pain-card h4 { margin-bottom: 8px; font-size: 1.0625rem; }
.pain-card p { font-size: 0.875rem; line-height: 1.7; }
@media (max-width: 768px) {
    .pain-grid { grid-template-columns: 1fr; }
}

/* ===== Security Grid ===== */
.security-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 24px;
}
.security-card {
    background: #fff; border-radius: var(--radius-md); padding: 24px;
    border: 1px solid var(--border); box-shadow: var(--shadow-sm); text-align: center;
    transition: box-shadow 0.2s;
}
.security-card:hover { box-shadow: var(--shadow-md); }
.security-card .sec-icon { font-size: 2rem; margin-bottom: 12px; }
.security-card h4 { font-size: 0.9375rem; margin-bottom: 6px; }
.security-card p { font-size: 0.8125rem; }
@media (max-width: 768px) {
    .security-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Scenario Grid ===== */
.scenario-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 24px;
}
.scenario-card {
    background: #fff; border-radius: var(--radius-lg); padding: 28px;
    border: 1px solid var(--border); box-shadow: var(--shadow-sm);
}
.scenario-card .sc-tag {
    display: inline-block; padding: 3px 10px; border-radius: 50px;
    font-size: 0.75rem; font-weight: 600; margin-bottom: 12px;
}
.scenario-card .sc-tag.c1 { background: rgba(59,130,246,0.1); color: #3B82F6; }
.scenario-card .sc-tag.c2 { background: rgba(16,185,129,0.1); color: #10B981; }
.scenario-card .sc-tag.c3 { background: rgba(99,102,241,0.1); color: #6366F1; }
.scenario-card h4 { font-size: 1.0625rem; margin-bottom: 8px; }
.scenario-card p { font-size: 0.875rem; }
@media (max-width: 768px) {
    .scenario-grid { grid-template-columns: 1fr; }
}

/* ================================================================
   Product Page (中微万悟) — Dark / Tech Premium Styles
   ================================================================ */
.page-wanwu .hero {
    background: linear-gradient(170deg, #F4F7FB 0%, #E6EEF7 50%, #DCE7F2 100%);
}
.page-wanwu .hero::before {
    background:
        radial-gradient(ellipse 50% 45% at 15% 30%, rgba(37,99,235,0.05) 0%, transparent 55%),
        radial-gradient(ellipse 35% 30% at 80% 60%, rgba(96,165,250,0.06) 0%, transparent 55%);
}
.page-wanwu .hero::after {
    background: none;
}

/* Light hero text overrides */
.page-wanwu .hero { color: var(--text-primary); }
.page-wanwu .hero h1 { color: #0A1628; }
.page-wanwu .hero h1 span { color: var(--accent); }
.page-wanwu .hero .hero-content > p { color: var(--text-secondary); }
.page-wanwu .hero .hero-content > p[style*="1.25rem"] { color: var(--text-primary) !important; font-weight: 600; }


/* Evolution: Before vs After */
.evolve-compare {
    display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 40px;
}
.evolve-box {
    border-radius: var(--radius-lg); padding: 32px;
    border: 1px solid var(--border);
}
.evolve-box.before { background: var(--bg-gray); }
.evolve-box.after {
    background: linear-gradient(135deg, #0F2B4C, #153E75);
    color: #fff; border-color: rgba(59,130,246,0.3);
}
.evolve-box.after p { color: rgba(255,255,255,0.7); }
.evolve-box.after h3 { color: #fff; }
.evolve-box h3 { margin-bottom: 16px; font-size: 1.25rem; }
.evolve-flow { display: flex; flex-direction: column; gap: 8px; margin: 16px 0; }
.evolve-step {
    padding: 10px 16px; border-radius: var(--radius-sm);
    font-size: 0.875rem; font-weight: 500;
}
.evolve-box.before .evolve-step { background: #fff; color: var(--text-secondary); }
.evolve-box.after .evolve-step {
    background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.85);
    border: 1px solid rgba(255,255,255,0.08);
}
.evolve-outcome {
    margin-top: 16px; padding: 12px 16px; border-radius: var(--radius-sm);
    font-weight: 600; font-size: 0.9375rem; text-align: center;
}
.evolve-box.before .evolve-outcome { background: rgba(0,0,0,0.04); color: var(--text-secondary); }
.evolve-box.after .evolve-outcome {
    background: rgba(59,130,246,0.2); color: #93C5FD;
}

/* Gap Cards (Now light background) */

/* Architecture Layers (Product Page) */
.arch-grid {
    display: grid; grid-template-columns: 1fr; gap: 0;
    max-width: 800px; margin: 0 auto;
}
.arch-block {
    padding: 20px 24px; border-left: 3px solid rgba(59,130,246,0.3);
    transition: border-color 0.2s;
}
.arch-block:hover { border-left-color: var(--accent); }
.arch-block.l1 { border-left-color: rgba(59,130,246,0.25); background: rgba(59,130,246,0.03); }
.arch-block.l2 { border-left-color: rgba(99,102,241,0.25); background: rgba(99,102,241,0.03); }
.arch-block.l3 { border-left-color: rgba(16,185,129,0.25); background: rgba(16,185,129,0.03); }
.arch-block.l4 { border-left-color: rgba(245,158,11,0.25); background: rgba(245,158,11,0.03); }
.arch-block .arch-label {
    font-size: 0.75rem; font-weight: 700; letter-spacing: 0.08em;
    margin-bottom: 4px; opacity: 0.6;
}
.arch-block.l1 .arch-label { color: #93C5FD; }
.arch-block.l2 .arch-label { color: #C4B5FD; }
.arch-block.l3 .arch-label { color: #6EE7B7; }
.arch-block.l4 .arch-label { color: #FCD34D; }
.arch-block h4 { font-size: 1.0625rem; margin-bottom: 4px; }
.arch-block p { font-size: 0.875rem; color: rgba(255,255,255,0.5); margin-bottom: 0; }

/* Moat Grid */
.moat-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.moat-card {
    background: #fff; border-radius: var(--radius-lg); padding: 32px 24px;
    border: 1px solid var(--border); box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s, border-color 0.2s;
}
.moat-card:hover { box-shadow: var(--shadow-md); border-color: var(--accent); }
.moat-card .moat-icon { font-size: 1.75rem; margin-bottom: 12px; }
.moat-card h4 { font-size: 1.0625rem; margin-bottom: 8px; }
.moat-card p { font-size: 0.875rem; line-height: 1.6; }

/* Deployment Cards */
.deploy-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.deploy-card {
    border-radius: var(--radius-lg); padding: 36px 24px; text-align: center;
    border: 1px solid rgba(255,255,255,0.08);
    background: rgba(255,255,255,0.03); backdrop-filter: blur(4px);
    transition: border-color 0.2s, transform 0.2s;
}
.deploy-card:hover { border-color: rgba(59,130,246,0.3); transform: translateY(-2px); }
.deploy-card .deploy-icon { font-size: 2.5rem; margin-bottom: 16px; }
.deploy-card h4 { color: #fff; margin-bottom: 8px; font-size: 1.125rem; }
.deploy-card p { color: rgba(255,255,255,0.5); font-size: 0.8125rem; }

/* Implementation Steps */
.impl-steps {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 0;
    max-width: 900px; margin: 0 auto; position: relative;
}
.impl-step {
    text-align: center; padding: 32px 24px; position: relative;
}
.impl-step::after {
    content: '→'; position: absolute; right: -12px; top: 50%;
    transform: translateY(-50%); font-size: 1.5rem;
    color: rgba(59,130,246,0.4); font-weight: 300;
}
.impl-step:last-child::after { content: none; }
.impl-step .step-num {
    width: 48px; height: 48px; border-radius: 50%;
    background: var(--accent-gradient); color: #fff;
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 1.125rem; margin: 0 auto 16px;
}
.impl-step h4 { font-size: 1.0625rem; margin-bottom: 8px; }
.impl-step p { font-size: 0.8125rem; color: var(--text-muted); }

/* CTA Section */
.cta-section {
    background: linear-gradient(160deg, #020617 0%, #0F2B4C 50%, #153E75 100%);
    color: #fff; text-align: center; padding: 80px 24px;
    position: relative; overflow: hidden;
}
.cta-section::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(ellipse 50% 50% at 30% 20%, rgba(59,130,246,0.1) 0%, transparent 60%),
        radial-gradient(ellipse 40% 40% at 70% 80%, rgba(99,102,241,0.08) 0%, transparent 60%);
    pointer-events: none;
}
.cta-section h2 { color: #fff; margin-bottom: 12px; }
.cta-section p { color: rgba(255,255,255,0.6); margin: 0 auto 32px; font-size: 1.0625rem; }
.cta-section .hero-btns { justify-content: center; }
.cta-section .btn-outline { border-color: rgba(59,130,246,0.4); }
.cta-section .btn-outline:hover { border-color: rgba(59,130,246,0.7); background: rgba(59,130,246,0.1); }

/* Desktop-only: hide mobile-only elements */
.mobile-only { display: none; }
@media (max-width: 768px) {
    .evolve-compare { grid-template-columns: 1fr; }
    .moat-grid { grid-template-columns: 1fr; }
    .deploy-grid { grid-template-columns: 1fr; }
    .impl-steps { grid-template-columns: 1fr; }
    .impl-step::after { content: '↓'; right: 50%; top: auto; bottom: 0; transform: translateX(50%); }
    .impl-step { padding: 20px 24px; }
    .mobile-only { display: block; }
}

/* ===== Unified Card Styles ===== */
.u-card {
    background: #fff; border-radius: var(--radius-md); padding: 32px 28px;
    border: 1px solid var(--border); box-shadow: var(--shadow-xs);
    transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
}
.u-card:hover { box-shadow: var(--shadow-md); border-color: rgba(37,99,235,0.12); transform: translateY(-2px); }
.u-card-sm { padding: 24px 22px; }
.u-card-center { text-align: center; }
.u-card-title { font-size: 1.0625rem; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
.u-card-subtitle { font-size: 0.8125rem; color: var(--text-muted); margin-bottom: 16px; }
.u-card-label {
    font-size: 0.6875rem; font-weight: 700; color: var(--text-light);
    text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 8px;
}
.u-pill {
    display: inline-flex; padding: 5px 14px; border-radius: 50px;
    font-size: 0.75rem; background: var(--bg-gray); color: var(--text-secondary);
    font-weight: 500;
}
.u-pill-accent { background: rgba(37,99,235,0.06); color: var(--accent); }
.u-pill-row { display: flex; flex-wrap: wrap; gap: 8px; }
.u-text-sm { font-size: 0.8125rem; }
.u-text-xs { font-size: 0.75rem; }
.u-mb-sm { margin-bottom: 8px; }
.u-mb-md { margin-bottom: 16px; }
.u-mb-lg { margin-bottom: 24px; }
.u-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; font-size: 0.8125rem; color: var(--text-secondary); }
.u-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.u-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.u-grid-6 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }

/* Section color rhythm helpers */
.u-section-white { background: var(--bg-white); }
.u-section-gray { background: var(--bg-light); }

@media (max-width: 768px) {
    .u-grid-3, .u-grid-4 { grid-template-columns: 1fr; }
    .u-grid-6 { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Lucide Icons ===== */
.lucide { stroke-width: 1.6; }
.lucide-64 { width: 64px; height: 64px; }

/* ===== Advantage Check ===== */
.adv-check {
    position: absolute; top: -10px; right: -8px;
    color: #059669; width: 22px; height: 22px;
    background: #fff; border-radius: 50%;
}

/* ===== Story Progress Indicator (desktop) ===== */
.story-progress {
    position: fixed; right: 20px; top: 50%; transform: translateY(-50%);
    display: flex; flex-direction: column; gap: 14px; z-index: 900;
}
.sp-dot {
    display: block; width: 10px; height: 10px; border-radius: 50%;
    background: var(--border); border: none; cursor: pointer;
    transition: background 0.3s, transform 0.3s, box-shadow 0.3s;
}
.sp-dot:hover { transform: scale(1.3); }
.sp-dot.active {
    background: var(--accent); box-shadow: 0 0 8px rgba(37,99,235,0.4); transform: scale(1.2);
}
@media (max-width: 768px) {
    .story-progress { display: none; }
}

/* ===== Solution Card Accent Bar ===== */
.sc-accent {
    height: 4px; border-radius: 4px 4px 0 0; margin: 0 0 20px;
}
.solution-card { position: relative; }
.solution-card .sc-accent {
    position: absolute; top: 0; left: 0; right: 0; z-index: 1;
}

/* ===== Stat Card Icon ===== */
.sv-icon {
    width: 18px; height: 18px; margin-bottom: 6px;
    color: var(--accent); opacity: 0.6;
}

/* ===== Advantage Card Bar Fix ===== */
.advantage-card { position: relative; overflow: hidden; }
.advantage-card .ac-bar {
    position: absolute; top: 0; left: 0; right: 0; height: 4px; border-radius: 0;
}