/* Shared styles for business content pages: solutions, material supply, industry expertise */

:root {
    --bp-bg: #eff2f6;
    --bp-surface: #ffffff;
    --bp-ink: #101828;
    --bp-subtle: #475467;
    --bp-line: #d0d5dd;
    --bp-brand: #0f3d66;
    --bp-brand-deep: #0b2c4a;
    --bp-accent: #b54708;
    --bp-shadow: 0 12px 28px rgba(16, 24, 40, 0.08);
}

body {
    margin: 0;
    padding-top: 80px;
    background: var(--bp-bg);
    color: var(--bp-ink);
    font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

.navbar a.active-nav {
    color: #f1c40f;
}

.bp-hero {
    position: relative;
    min-height: 52vh;
    display: flex;
    align-items: center;
    color: #fff;
    background-size: cover;
    background-position: center;
    isolation: isolate;
}

.bp-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(110deg, rgba(6, 24, 40, 0.86) 0%, rgba(6, 24, 40, 0.52) 52%, rgba(6, 24, 40, 0.2) 100%);
    z-index: -1;
}

.bp-hero.solution {
    background-image: url("../img/hero.jpg");
}

.bp-hero.material {
    background-image: url("../img/duanzao2.jpg");
}

.bp-hero.industry {
    background-image: url("../img/hangkonghangtian.jpeg");
}

.bp-hero-inner {
    width: min(1180px, 92%);
    margin: 0 auto;
    padding: 74px 0 62px;
    animation: bp-fade-up 0.7s ease forwards;
}

.bp-kicker {
    display: inline-block;
    padding: 6px 12px;
    border: 1px solid rgba(255, 255, 255, 0.38);
    border-radius: 999px;
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.bp-hero h1 {
    max-width: 760px;
    margin: 0 0 14px;
    font-size: clamp(30px, 5vw, 52px);
    line-height: 1.18;
}

.bp-hero p {
    max-width: 760px;
    margin: 0;
    color: rgba(255, 255, 255, 0.9);
    font-size: clamp(16px, 2.2vw, 20px);
    line-height: 1.68;
}

.bp-main {
    width: min(1180px, 92%);
    margin: 0 auto;
    padding: 40px 0 64px;
}

.bp-breadcrumb {
    margin-bottom: 18px;
    font-size: 14px;
    color: #98a2b3;
}

.bp-breadcrumb a {
    color: #344054;
    text-decoration: none;
}

.bp-breadcrumb a:hover {
    text-decoration: underline;
}

.bp-strip {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 14px;
    margin-top: -42px;
    margin-bottom: 40px;
}

.bp-strip-item {
    background: var(--bp-surface);
    border: 1px solid var(--bp-line);
    border-radius: 12px;
    padding: 20px 18px;
    box-shadow: var(--bp-shadow);
}

.bp-strip-item strong {
    display: block;
    margin-bottom: 7px;
    color: var(--bp-brand);
    font-size: 20px;
}

.bp-strip-item span {
    color: var(--bp-subtle);
    font-size: 14px;
    line-height: 1.5;
}

.bp-section {
    margin-bottom: 28px;
    background: var(--bp-surface);
    border: 1px solid var(--bp-line);
    border-radius: 14px;
    padding: 30px;
    box-shadow: var(--bp-shadow);
}

.bp-section h2 {
    margin: 0 0 12px;
    font-size: clamp(24px, 3.2vw, 34px);
    line-height: 1.25;
}

.bp-section .bp-lead {
    margin: 0 0 22px;
    color: var(--bp-subtle);
    line-height: 1.78;
    font-size: 16px;
}

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

.bp-card {
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid var(--bp-line);
    border-radius: 12px;
    padding: 20px;
}

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

.bp-card p {
    margin: 0;
    color: var(--bp-subtle);
    line-height: 1.7;
}

.bp-list {
    margin: 0;
    padding-left: 18px;
    color: var(--bp-subtle);
    line-height: 1.78;
}

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

.bp-note {
    border-left: 3px solid var(--bp-brand);
    background: #f5f8fc;
    padding: 14px 16px;
    border-radius: 8px;
    color: var(--bp-subtle);
    line-height: 1.72;
}

.bp-steps {
    counter-reset: step;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
}

.bp-step {
    position: relative;
    padding: 18px 18px 18px 62px;
    border: 1px solid var(--bp-line);
    border-radius: 12px;
    background: #fff;
}

.bp-step::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    position: absolute;
    left: 18px;
    top: 18px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bp-brand);
    color: #fff;
    font-weight: 700;
    font-size: 13px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.bp-step h3 {
    margin: 0 0 7px;
    font-size: 18px;
    color: var(--bp-brand-deep);
}

.bp-step p {
    margin: 0;
    color: var(--bp-subtle);
    line-height: 1.66;
}

.bp-table {
    overflow-x: auto;
}

.bp-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 720px;
}

.bp-table th,
.bp-table td {
    border-bottom: 1px solid var(--bp-line);
    padding: 14px 10px;
    text-align: left;
}

.bp-table th {
    color: var(--bp-brand-deep);
    font-size: 14px;
}

.bp-table td {
    color: var(--bp-subtle);
    font-size: 15px;
    line-height: 1.65;
}

.bp-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.bp-tag {
    display: inline-block;
    padding: 8px 13px;
    border-radius: 999px;
    border: 1px solid var(--bp-line);
    color: var(--bp-brand-deep);
    background: #fff;
    font-size: 14px;
}

.bp-cta {
    margin-top: 12px;
    border-radius: 14px;
    padding: 30px;
    background: linear-gradient(135deg, #0b2c4a 0%, #114f82 100%);
    color: #fff;
    box-shadow: var(--bp-shadow);
}

.bp-cta h2 {
    margin: 0 0 12px;
    font-size: clamp(24px, 3.2vw, 32px);
}

.bp-cta p {
    margin: 0 0 18px;
    max-width: 800px;
    line-height: 1.75;
    color: rgba(255, 255, 255, 0.88);
}

.bp-cta-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.bp-btn {
    display: inline-block;
    text-decoration: none;
    padding: 11px 18px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.62);
    color: #fff;
    transition: all 0.2s ease;
}

.bp-btn:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.12);
}

.bp-btn.accent {
    background: var(--bp-accent);
    border-color: var(--bp-accent);
}

.bp-btn.accent:hover {
    background: #c15a16;
    border-color: #c15a16;
}

@keyframes bp-fade-up {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 980px) {
    .bp-strip {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

    .bp-steps {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 64px;
    }

    .bp-hero {
        min-height: 44vh;
    }

    .bp-main {
        padding: 24px 0 50px;
    }

    .bp-strip {
        margin-top: 0;
    }

    .bp-section {
        padding: 24px 18px;
    }
}

@media (max-width: 560px) {
    .bp-strip,
    .bp-grid {
        grid-template-columns: 1fr;
    }
}


/* Business pages mobile navigation refinement */
@media (max-width: 768px) {
    body.nav-open::before {
        content: "";
        position: fixed;
        inset: 64px 0 0 0;
        background: rgba(5, 10, 18, 0.42);
        z-index: 98;
    }

    header {
        padding: 8px 12px;
        background: rgba(10, 12, 16, 0.88);
        backdrop-filter: blur(18px) saturate(135%);
        -webkit-backdrop-filter: blur(18px) saturate(135%);
    }

    nav {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
    }

    .logo img {
        height: 44px;
    }

    .menu-toggle {
        min-width: 44px;
        min-height: 44px;
        display: grid;
        place-items: center;
        font-size: 26px;
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.08);
    }

    .navbar {
        top: 64px;
        right: -100vw;
        width: 100vw;
        height: calc(100dvh - 64px);
        padding: 8px 0 24px;
        background: linear-gradient(180deg, rgba(21, 23, 28, 0.98) 0%, rgba(31, 34, 40, 0.98) 100%);
        backdrop-filter: blur(18px) saturate(120%);
        -webkit-backdrop-filter: blur(18px) saturate(120%);
        box-shadow: none;
        z-index: 99;
    }

    .navbar.active {
        right: 0;
    }

    .navbar > li {
        width: 100%;
        margin: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .navbar > li.has-submenu {
        position: relative;
    }

    .navbar > li > a,
    .submenu-toggle {
        font-size: 16px;
        line-height: 1.5;
    }

    .navbar > li > a {
        display: block;
        padding: 18px 72px 18px 20px;
    }

    .navbar > li.has-submenu > .submenu-toggle {
        position: absolute;
        top: 9px;
        right: 12px;
        min-width: 44px;
        min-height: 44px;
        display: grid;
        place-items: center;
        padding: 0;
        font-size: 22px;
        color: rgba(255, 255, 255, 0.88);
        transition: transform 0.2s ease, color 0.2s ease;
    }

    .navbar > li.has-submenu > .submenu-toggle[aria-expanded="true"] {
        transform: rotate(90deg);
        color: #ffffff;
    }

    .navbar .sub-menu {
        display: none;
        position: static;
        flex: 0 0 100%;
        width: 100%;
        padding: 6px 0 10px;
        background: rgba(255, 255, 255, 0.04);
        box-shadow: none;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .navbar .sub-menu.show {
        display: block;
    }

    .navbar .sub-menu li {
        display: block;
        width: 100%;
        border-bottom: none;
    }

    .navbar .sub-menu li > a {
        display: block;
        width: 100%;
        color: rgba(255, 255, 255, 0.88);
        padding: 13px 20px 13px 34px;
        font-size: 15px;
    }

    nav ul li a.request-quote {
        display: block;
        width: calc(100% - 32px);
        margin: 16px 16px 0;
        border-radius: 14px;
        text-align: center;
        font-weight: 700;
    }
}

@media (max-width: 480px) {
    body.nav-open::before {
        inset: 60px 0 0 0;
    }

    header {
        padding: 8px 10px;
    }

    .logo img {
        height: 42px;
    }

    .navbar {
        top: 60px;
        height: calc(100dvh - 60px);
    }
}