:root {
    --bg: #f4f7fc;
    --surface: #ffffff;
    --primary: #1d4ed8;
    --primary-soft: #dbeafe;
    --text: #0f172a;
    --muted: #475569;
    --line: #dbe3ef;
    --radius: 14px;
    --shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.65;
}

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

.container {
    width: min(1120px, calc(100% - 32px));
    margin: 0 auto;
}

.section {
    padding: 72px 0;
}

.section-title {
    text-align: center;
    font-size: 34px;
    margin-bottom: 12px;
}

.section-subtitle {
    text-align: center;
    color: var(--muted);
    margin-bottom: 28px;
}

.header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 68px;
    gap: 16px;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
}

.brand-logo {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    object-fit: cover;
    border: 1px solid var(--line);
    background: #ffffff;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-link {
    padding: 8px 14px;
    border-radius: 10px;
    color: var(--muted);
    font-weight: 600;
}

.nav-link:hover,
.active-link {
    background: var(--primary-soft);
    color: var(--primary);
}

.nav-cta {
    background: var(--primary);
    color: #ffffff;
}

.nav-cta:hover {
    background: #1e40af;
    color: #ffffff;
}

.menu-toggle {
    display: none;
    border: 0;
    background: transparent;
    font-size: 24px;
    cursor: pointer;
}

.hero {
    position: relative;
    padding-top: 84px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s ease;
}

.hero--has-bg .hero-bg {
    opacity: 1;
}

.hero--has-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(105deg, rgba(255, 255, 255, 0.96) 42%, rgba(255, 255, 255, 0.78) 100%);
    pointer-events: none;
}

.hero--has-bg .hero-grid {
    position: relative;
    z-index: 1;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 24px;
    align-items: center;
}

.kicker {
    display: inline-block;
    background: var(--primary-soft);
    color: var(--primary);
    padding: 6px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 14px;
}

h1 {
    font-size: 44px;
    line-height: 1.2;
    margin-bottom: 14px;
}

.lead {
    color: var(--muted);
    margin-bottom: 22px;
    font-size: 17px;
}

.actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 10px;
    font-weight: 700;
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
}

.btn-secondary {
    background: #ffffff;
    border: 1px solid var(--line);
}

.hero-panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 22px;
    box-shadow: var(--shadow);
}

.hero-panel h2 {
    margin-bottom: 10px;
    font-size: 24px;
}

.hero-points {
    list-style: none;
}

.hero-points li {
    padding: 8px 0 8px 24px;
    position: relative;
    color: var(--muted);
}

.hero-points li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 8px;
    color: #16a34a;
    font-weight: 800;
}

.hero-meta {
    margin-top: 16px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
    font-size: 13px;
    color: var(--muted);
}

.hero-meta-sep {
    margin: 0 6px;
}

.contact-company {
    margin-top: 8px;
    font-size: 14px;
    opacity: 0.9;
}

.contact-details {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 14px;
    opacity: 0.95;
}

.contact-details strong {
    font-weight: 700;
}

.btn-outline-light {
    border-color: rgba(255, 255, 255, 0.55);
    background: transparent;
    color: #ffffff;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.card h3 {
    margin-bottom: 8px;
}

.card p {
    color: var(--muted);
}

.muted {
    background: #edf3ff;
}

.tag-list {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.tag {
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 10px 16px;
    color: #1e3a8a;
    font-weight: 600;
}

.adv-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.adv-grid article {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 20px;
}

.adv-grid p {
    color: var(--muted);
}

.cta {
    padding-top: 44px;
}

.cta-box {
    background: linear-gradient(135deg, #1e3a8a, #1d4ed8);
    border-radius: calc(var(--radius) + 2px);
    color: #ffffff;
    padding: 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
}

.cta-box h2 {
    margin-bottom: 6px;
}

.cta-box .btn-primary {
    background: #ffffff;
    color: #1e3a8a;
}

.cta-box .btn-secondary {
    border-color: rgba(255, 255, 255, 0.45);
    background: transparent;
    color: #ffffff;
}

.footer {
    border-top: 1px solid var(--line);
    background: #ffffff;
    padding: 20px 0;
}

.footer-inner {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    color: var(--muted);
    font-size: 14px;
}

.footer-primary {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

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

.footer-icp:hover {
    color: var(--primary);
}

.footer-tagline {
    text-align: right;
    max-width: 320px;
}

@media (max-width: 900px) {
    h1 {
        font-size: 34px;
    }

    .hero-grid,
    .card-grid,
    .adv-grid,
    .cta-box,
    .footer-inner {
        grid-template-columns: 1fr;
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-tagline {
        text-align: left;
        max-width: none;
    }

    .card-grid {
        display: grid;
    }

    .menu-toggle {
        display: block;
    }

    .nav-menu {
        position: fixed;
        right: 16px;
        top: 64px;
        width: min(280px, calc(100% - 32px));
        background: #ffffff;
        border: 1px solid var(--line);
        border-radius: 12px;
        box-shadow: var(--shadow);
        padding: 10px;
        flex-direction: column;
        align-items: stretch;
        transform: scale(0.96);
        opacity: 0;
        visibility: hidden;
        transition: all 0.2s ease;
    }

    .nav-menu.open {
        opacity: 1;
        visibility: visible;
        transform: scale(1);
    }
}