:root {
    color-scheme: light;
    --ink: #1f2933;
    --muted: #5d6673;
    --line: #d9e0e8;
    --brand: #1f6f78;
    --brand-dark: #164e55;
    --accent: #bf6b21;
    --soft: #f4f7f9;
    --white: #fff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    color: var(--ink);
    font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
    line-height: 1.6;
    background: var(--white);
}

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

.topbar {
    background: #172026;
    color: #fff;
    font-size: 14px;
}

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

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    min-height: 44px;
}

.contact-row,
.nav-links {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.nav-note,
.nav-links a {
    color: #c6d2dc;
}

.nav-links a:hover,
.contact-row a:hover {
    color: #ffd29a;
}

.hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(120deg, #11363d, #27686a);
    color: #fff;
    padding: 68px 0 56px;
}

.hero::before {
    position: absolute;
    inset: 0;
    content: "";
    background:
        linear-gradient(90deg, rgba(255, 255, 255, .055) 1px, transparent 1px),
        linear-gradient(0deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
    background-size: 44px 44px;
    opacity: .55;
}

.hero-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: minmax(0, 1.55fr) minmax(280px, .75fr);
    gap: 42px;
    align-items: center;
}

.eyebrow {
    color: #ffd9a7;
    font-weight: 700;
    margin: 0 0 12px;
}

h1 {
    margin: 0;
    font-size: clamp(32px, 5vw, 54px);
    line-height: 1.16;
    letter-spacing: 0;
}

.hero-lead {
    max-width: 760px;
    margin: 18px 0 0;
    color: #e8f0f3;
    font-size: 19px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: 28px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 10px 18px;
    border-radius: 6px;
    font-weight: 700;
    border: 1px solid rgba(255, 255, 255, .45);
}

.btn-primary {
    color: #1b2830;
    background: #ffd29a;
    border-color: #ffd29a;
}

.btn-ghost {
    color: #fff;
    background: rgba(255, 255, 255, .08);
}

.hero-panel {
    border: 1px solid rgba(255, 255, 255, .26);
    border-radius: 8px;
    padding: 22px;
    background: rgba(13, 27, 32, .48);
}

.hero-panel h2 {
    margin: 0 0 14px;
    color: #fff;
    font-size: 20px;
}

.hero-panel ul {
    margin: 0;
    padding-left: 20px;
    color: #ecf6f7;
}

.section {
    padding: 54px 0;
}

.section.alt {
    background: var(--soft);
}

.section-head {
    max-width: 780px;
    margin-bottom: 26px;
}

h2 {
    margin: 0 0 10px;
    color: #172026;
    font-size: 28px;
    line-height: 1.25;
}

.section-head p,
.muted {
    margin: 0;
    color: var(--muted);
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
    gap: 16px;
}

.card {
    min-height: 176px;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 20px;
    background: #fff;
}

.card h3 {
    margin: 0 0 10px;
    color: var(--brand-dark);
    font-size: 20px;
}

.card p {
    margin: 0;
    color: var(--muted);
}

.card-link {
    display: block;
    height: 100%;
}

.card-link:hover h3 {
    color: var(--accent);
}

.features {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.feature {
    padding: 0 0 0 18px;
    border-left: 4px solid var(--accent);
}

.feature h3 {
    margin: 0 0 8px;
    font-size: 19px;
}

.feature p {
    margin: 0;
    color: var(--muted);
}

.split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
}

.list {
    margin: 0;
    padding-left: 20px;
    color: var(--muted);
}

.list li + li {
    margin-top: 8px;
}

.product-nav {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 18px;
}

.pill {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 6px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--brand-dark);
    background: #fff;
    font-size: 14px;
}

.floating-actions {
    position: fixed;
    right: 18px;
    bottom: 18px;
    z-index: 20;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.floating-actions a {
    min-width: 104px;
    padding: 10px 14px;
    border-radius: 999px;
    color: #172026;
    font-weight: 700;
    text-align: center;
    background: #ffd29a;
    box-shadow: 0 10px 24px rgba(23, 32, 38, .18);
}

.floating-actions a.secondary {
    color: #fff;
    background: #1f6f78;
}

.inquiry-form {
    display: grid;
    gap: 16px;
    width: 100%;
    min-width: 0;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 24px;
    background: #fff;
}

.inquiry-form label {
    display: grid;
    gap: 7px;
    color: #172026;
    font-weight: 700;
}

.inquiry-form input,
.inquiry-form select,
.inquiry-form textarea {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 11px 12px;
    color: var(--ink);
    font: inherit;
    font-size: 16px;
    background: #fff;
}

.inquiry-form textarea {
    resize: vertical;
}

.form-submit {
    width: 100%;
    color: #172026;
    cursor: pointer;
}

.form-submit:disabled {
    cursor: not-allowed;
    opacity: .7;
}

.form-status {
    min-height: 24px;
    margin: 0;
    color: var(--brand-dark);
    font-weight: 700;
}

.form-status.is-error {
    color: #b42318;
}

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

.spec-block {
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 22px;
    background: #fff;
}

.spec-block h2 {
    font-size: 24px;
}

.contact-box {
    border-radius: 8px;
    padding: 28px;
    color: #fff;
    background: #18323a;
}

.contact-box h2 {
    color: #fff;
}

.contact-box p {
    color: #dce9ed;
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    margin-top: 20px;
}

.contact-method {
    border: 1px solid rgba(255, 255, 255, .24);
    border-radius: 8px;
    padding: 15px;
}

.contact-method strong {
    display: block;
    margin-bottom: 4px;
    color: #ffd29a;
}

footer {
    padding: 20px 0 28px;
    color: #687482;
    text-align: center;
    font-size: 12px;
}

footer a {
    color: #687482;
}

@media (max-width: 900px) {
    .hero-grid,
    .split,
    .spec-grid {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 640px) {
    .wrap {
        width: min(100% - 24px, 1120px);
    }

    body {
        padding-bottom: 76px;
    }

    .topbar-inner {
        align-items: flex-start;
        flex-direction: column;
        padding: 10px 0;
    }

    .nav-links {
        gap: 10px 14px;
    }

    .hero {
        padding: 34px 0 30px;
    }

    .hero-grid {
        gap: 22px;
    }

    h1 {
        font-size: 32px;
    }

    .hero-lead {
        margin-top: 12px;
        font-size: 17px;
    }

    .hero-panel {
        padding: 16px;
    }

    .features,
    .contact-methods {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 30px 0;
    }

    .inquiry-form {
        gap: 14px;
        border-radius: 6px;
        padding: 16px;
    }

    .inquiry-form input,
    .inquiry-form select,
    .inquiry-form textarea {
        min-height: 46px;
        padding: 12px;
    }

    .spec-block {
        padding: 16px;
    }

    .spec-block h2 {
        font-size: 21px;
    }

    .floating-actions {
        right: 0;
        bottom: 0;
        left: 0;
        flex-direction: row;
        gap: 0;
        padding: 8px 12px;
        background: rgba(255, 255, 255, .96);
        border-top: 1px solid var(--line);
    }

    .floating-actions a {
        flex: 1;
        min-width: 0;
        padding: 10px 8px;
        border-radius: 6px;
        font-size: 14px;
        box-shadow: none;
    }

    .floating-actions a + a {
        margin-left: 8px;
    }
}