:root {
    --navy: #0f1f45;
    --navy-deep: #0a1632;
    --navy-soft: #162955;
    --sky: #1ea7ff;
    --sky-soft: #83d2ff;
    --text: #1d2840;
    --muted: #61708d;
    --surface: #f4f8fd;
    --white: #ffffff;
    --border: rgba(15, 31, 69, 0.1);
    --shadow: 0 24px 70px rgba(10, 22, 50, 0.12);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text);
    background: linear-gradient(180deg, #eef5fc 0%, #ffffff 30%, #f5f8fd 100%);
}

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

.site-header {
    position: sticky;
    top: 0;
    z-index: 30;
    background: rgba(15, 31, 69, 0.94);
    backdrop-filter: blur(16px);
    box-shadow: 0 10px 30px rgba(10, 22, 50, 0.18);
}

.site-header__inner {
    max-width: 1480px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    gap: 22px;
}

.site-logo img {
    width: auto;
    height: 68px;
    display: block;
}

.site-nav {
    display: flex;
    flex: 1;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px 18px;
}

.site-nav a {
    color: rgba(255, 255, 255, 0.88);
    font-size: 0.98rem;
    transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
    color: var(--sky-soft);
}

.site-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 18px;
    border-radius: 12px;
    border: 1px solid transparent;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.button:hover {
    transform: translateY(-1px);
}

.button--solid {
    background: linear-gradient(135deg, #1ea7ff 0%, #0c85d4 100%);
    color: var(--white);
    box-shadow: 0 16px 30px rgba(30, 167, 255, 0.28);
}

.button--ghost,
.button--ghost-light {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.26);
    color: var(--white);
}

.button--ghost:hover,
.button--ghost-light:hover {
    background: rgba(255, 255, 255, 0.08);
}

.hero {
    position: relative;
    min-height: 520px;
    overflow: hidden;
    background:
        radial-gradient(circle at top left, rgba(30, 167, 255, 0.22), transparent 34%),
        linear-gradient(135deg, rgba(7, 14, 33, 0.72), rgba(11, 31, 69, 0.68)),
        url("/support/what-is-conversational-ai-1.jpg") center center/cover no-repeat;
}

.hero__overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(180deg, rgba(6, 12, 30, 0.12), rgba(6, 12, 30, 0.5)),
        radial-gradient(circle at 72% 28%, rgba(30, 167, 255, 0.14), transparent 22%);
}

.hero__content {
    position: relative;
    max-width: 1480px;
    margin: 0 auto;
    padding: 120px 24px 90px;
    color: var(--white);
}

.eyebrow {
    margin: 0 0 14px;
    font-size: 0.82rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: #bde7ff;
}

.eyebrow--dark {
    color: var(--sky);
}

.hero h1 {
    margin: 0;
    max-width: 780px;
    font-size: clamp(2.6rem, 4vw, 4.8rem);
    line-height: 1.02;
    letter-spacing: -0.03em;
}

.hero__lead {
    max-width: 760px;
    margin: 22px 0 0;
    font-size: 1.1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.88);
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 32px;
}

.section-shell {
    max-width: 1480px;
    margin: 0 auto;
    padding: 0 24px;
}

.support-grid-section {
    padding: 72px 0 56px;
}

.section-heading {
    max-width: 800px;
    margin-bottom: 30px;
}

.section-heading h2,
.help-strip h2 {
    margin: 0;
    font-size: clamp(2rem, 3vw, 3rem);
    line-height: 1.08;
}

.section-heading p,
.help-strip p {
    margin: 14px 0 0;
    color: var(--muted);
    line-height: 1.8;
    font-size: 1rem;
}

.notice-card {
    margin-bottom: 28px;
    padding: 24px 26px;
    border-radius: 22px;
    background: linear-gradient(135deg, rgba(15, 31, 69, 0.06), rgba(30, 167, 255, 0.08));
    border: 1px solid rgba(15, 31, 69, 0.08);
}

.notice-card h3 {
    margin: 0 0 10px;
    font-size: 1.18rem;
}

.notice-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.8;
}

.support-alert {
    margin-bottom: 28px;
    padding: 26px 28px;
    border-radius: 24px;
    background: linear-gradient(135deg, rgba(15, 31, 69, 0.96), rgba(22, 41, 85, 0.92));
    color: var(--white);
    box-shadow: 0 24px 60px rgba(10, 22, 50, 0.22);
}

.support-alert h3 {
    margin: 0 0 12px;
    font-size: 1.24rem;
    line-height: 1.4;
}

.support-alert p {
    margin: 0;
    color: rgba(255, 255, 255, 0.84);
    line-height: 1.8;
}

.support-alert__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.button--ghost-dark {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.24);
    color: var(--white);
}

.button--ghost-dark:hover {
    background: rgba(255, 255, 255, 0.08);
}

.button--soft {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.18);
    color: var(--white);
}

.button--soft:hover {
    background: rgba(255, 255, 255, 0.18);
}

.support-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}

.support-card {
    min-height: 250px;
    padding: 28px;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.92);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.support-card__index {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 54px;
    height: 54px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(30, 167, 255, 0.18), rgba(15, 31, 69, 0.12));
    color: var(--navy);
    font-weight: 800;
}

.support-card h3 {
    margin: 0;
    font-size: 1.38rem;
}

.support-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.8;
    flex: 1;
}

.support-card__link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--sky);
    font-weight: 700;
}

.support-card__link::after {
    content: "→";
}

.help-strip {
    padding: 0 0 80px;
}

.help-strip__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    padding: 34px 36px;
    border-radius: 28px;
    background: linear-gradient(135deg, rgba(15, 31, 69, 0.95), rgba(22, 41, 85, 0.95));
    color: var(--white);
    box-shadow: var(--shadow);
}

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

@media (max-width: 1180px) {
    .site-header__inner {
        flex-wrap: wrap;
        justify-content: center;
    }

    .site-nav {
        order: 3;
        width: 100%;
    }

    .support-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .help-strip__inner {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 760px) {
    .site-logo img {
        height: 56px;
    }

    .site-actions {
        width: 100%;
        justify-content: center;
    }

    .hero__content {
        padding-top: 90px;
        padding-bottom: 72px;
    }

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

    .support-card {
        min-height: 0;
    }
}