:root {
    --color-primary: #1F5C5B;
    --color-secondary: #9BCF53;
    --color-accent: #FFB347;
    --color-background: #F5F7F2;
    --color-background-soft: #E8F0EA;
    --color-surface: #FFFFFF;
    --color-text: #1F2A2E;
    --color-text-light: #58626E;
    --color-border: rgba(31, 92, 91, 0.15);

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    --border-radius-sm: 6px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
    --border-radius-full: 9999px;

    --shadow-sm: 0 8px 20px rgba(31, 92, 91, 0.08);
    --shadow-md: 0 20px 45px rgba(31, 92, 91, 0.12);
    --shadow-lg: 0 30px 70px rgba(15, 39, 63, 0.18);

    --transition-fast: 0.2s ease;
    --transition-base: 0.35s ease;
    --transition-slow: 0.6s ease;
}

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

body {
    font-family: "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: var(--color-text);
    background-color: var(--color-background);
    background-image: radial-gradient(circle at 1px 1px, rgba(31, 92, 91, 0.08) 1px, transparent 0);
    background-size: 120px 120px;
    line-height: 1.7;
    letter-spacing: 0.015em;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: inherit;
}

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

.container {
    width: 100%;
    max-width: 1220px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-2xl) 0;
}

.section-heading {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-heading h2 {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.section-heading p {
    color: var(--color-text-light);
    max-width: 720px;
    margin: 0 auto;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.85rem;
    background: rgba(31, 92, 91, 0.08);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-full);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.text-muted {
    color: var(--color-text-light);
}

.section-contrast {
    background: linear-gradient(135deg, rgba(31, 92, 91, 0.08), rgba(155, 207, 83, 0.08));
    position: relative;
    overflow: hidden;
}

.section-contrast::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% -10%, rgba(255, 179, 71, 0.18), transparent 40%),
        radial-gradient(circle at 80% 0%, rgba(155, 207, 83, 0.18), transparent 35%);
    opacity: 0.85;
    pointer-events: none;
}

.section-contrast > .container {
    position: relative;
    z-index: 1;
}

.split-layout {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
    align-items: center;
}

.panel {
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.panel.accent {
    background: linear-gradient(140deg, rgba(31, 92, 91, 0.08), rgba(255, 179, 71, 0.1));
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--spacing-lg);
}

.stat-card {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-sm);
}

.stat-card h3 {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-card p {
    color: var(--color-text-light);
}

.insight-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
}

.insight-card {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.85);
    box-shadow: var(--shadow-sm);
}

.insight-card h3 {
    margin-bottom: var(--spacing-xs);
}

.list-check {
    list-style: none;
    display: grid;
    gap: var(--spacing-sm);
}

.list-check li {
    position: relative;
    padding-left: 1.75rem;
    color: var(--color-text-light);
}

.list-check li::before {
    content: "✔";
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: 700;
}

.pill-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.pill-list span {
    padding: 0.35rem 0.85rem;
    border-radius: var(--border-radius-full);
    background: rgba(31, 92, 91, 0.08);
    font-size: var(--font-size-sm);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 2rem;
    border-radius: var(--border-radius-full);
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    font-size: var(--font-size-base);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #133738);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

.btn-outline {
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    background: transparent;
}

.btn-light {
    background-color: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(8px);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid rgba(31, 92, 91, 0.08);
}

.navbar {
    min-height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.08em;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: nowrap;
    white-space: nowrap;
    font-size: 0.95rem;
    overflow-x: auto;
    scrollbar-width: none;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.nav-link {
    font-weight: 600;
    color: var(--color-text);
    position: relative;
    padding-bottom: 4px;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0%;
    height: 2px;
    background: var(--color-secondary);
    transition: width var(--transition-base);
}

.nav-link:hover,
.nav-item:hover > .nav-link {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-item:hover > .nav-link::after {
    width: 100%;
}

.nav-item {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(255, 255, 255, 0.97);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-sm) 0;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-base);
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    padding: var(--spacing-xs) var(--spacing-lg);
    display: block;
    color: var(--color-text);
    font-size: var(--font-size-sm);
}

.dropdown-item:hover {
    background: rgba(31, 92, 91, 0.08);
    color: var(--color-primary);
}

.hero-ningxia {
    position: relative;
    background: linear-gradient(120deg, rgba(15, 57, 64, 0.95), rgba(31, 92, 91, 0.88)),
        url('../images/raw_material_potato_field.png') center/cover no-repeat;
    color: #fff;
    padding: var(--spacing-2xl) 0 var(--spacing-2xl);
    overflow: hidden;
}

.hero-ningxia::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 20% 20%, rgba(255, 179, 71, 0.4), transparent 45%),
        url('../images/raw_material_potato_field.png') center/cover no-repeat;
    opacity: 0.2;
    mix-blend-mode: screen;
    animation: floatBubbles 15s infinite linear;
}

.hero-ningxia .hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    gap: var(--spacing-xl);
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
}

.hero-description {
    max-width: 600px;
    color: rgba(255, 255, 255, 0.85);
    font-size: var(--font-size-lg);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-md);
}

.hero-metric {
    background: rgba(255, 255, 255, 0.12);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid rgba(255, 255, 255, 0.25);
    text-align: center;
    backdrop-filter: blur(6px);
}

.hero-metric h3 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xs);
}

.bg-sand {
    background: linear-gradient(180deg, #ECF4F0, #F5F7F2);
}

.grid {
    display: grid;
    gap: var(--spacing-lg);
}

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

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.chain-flow {
    position: relative;
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl) var(--spacing-lg);
    box-shadow: var(--shadow-md);
}

.chain-flow-grid {
    position: relative;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-lg);
}

.flow-step {
    text-align: center;
    position: relative;
    padding: var(--spacing-lg) var(--spacing-md);
}

.flow-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 50%;
    right: -12px;
    width: 24px;
    height: 2px;
    background: var(--color-secondary);
}

.flow-step .flow-icon {
    width: 70px;
    height: 70px;
    border-radius: 20px;
    background: rgba(155, 207, 83, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-sm);
    font-size: 1.8rem;
    color: var(--color-secondary);
}

.product-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.product-card img {
    border-radius: var(--border-radius-md);
    height: 200px;
    object-fit: cover;
    margin-bottom: var(--spacing-md);
}

.product-card h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
}

.product-card ul {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.product-card li {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-light);
}

.factory-tour {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
    align-items: center;
}

.factory-media {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.factory-media::after {
    content: "";
    position: absolute;
    inset: 0;
    border: 12px solid rgba(255, 255, 255, 0.25);
    border-radius: var(--border-radius-lg);
    mix-blend-mode: overlay;
}

.factory-stats {
    display: grid;
    gap: var(--spacing-md);
}

.factory-stat {
    background: rgba(255, 255, 255, 0.6);
    border-left: 4px solid var(--color-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
}

.factory-stat h4 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
}

.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
}

.application-card {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    background: rgba(255, 255, 255, 0.65);
    box-shadow: var(--shadow-sm);
}

.application-card .icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-sm);
    border-radius: 16px;
    background: rgba(31, 92, 91, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--color-accent);
}

.quality-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.quality-card {
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    border: 1px dashed rgba(31, 92, 91, 0.18);
    background: var(--color-surface);
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: var(--font-size-sm);
    border-radius: var(--border-radius-full);
    background: rgba(31, 92, 91, 0.12);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.hero-ningxia .badge,
.page-hero .badge {
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
}

.page-hero {
    background: linear-gradient(120deg, rgba(15, 57, 64, 0.94), rgba(31, 92, 91, 0.88)),
        url('../images/raw_material_farm_landscape.png') center/cover no-repeat;
    color: #fff;
    padding: var(--spacing-2xl) 0;
    text-align: center;
}

.page-hero h1 {
    font-size: var(--font-size-4xl);
    margin-bottom: var(--spacing-sm);
}

.breadcrumb {
    background: transparent;
    padding: var(--spacing-md) 0 var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.breadcrumb a {
    color: var(--color-primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.info-card {
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
}

.timeline {
    position: relative;
    padding-left: var(--spacing-2xl);
}

.timeline::before {
    content: "";
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: rgba(31, 92, 91, 0.25);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-md);
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: -20px;
    top: 6px;
    width: 12px;
    height: 12px;
    background: var(--color-secondary);
    border-radius: 50%;
    box-shadow: 0 0 0 6px rgba(155, 207, 83, 0.25);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table thead {
    background: rgba(31, 92, 91, 0.06);
}

.data-table th,
.data-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid rgba(31, 92, 91, 0.12);
    text-align: left;
}

.news-grid,
.case-grid,
.partner-grid,
.job-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.news-card,
.case-card,
.partner-card,
.job-card {
    background: var(--color-surface);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.news-card h3,
.case-card h3,
.partner-card h3,
.job-card h3 {
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-xl);
}

.news-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
}

.map-card {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.footer {
    background: radial-gradient(circle at top, rgba(155, 207, 83, 0.12), transparent 40%), #0F1D23;
    color: rgba(255, 255, 255, 0.88);
    padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

.footer-main {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.footer h4 {
    margin-bottom: var(--spacing-sm);
}

.footer ul {
    list-style: none;
}

.footer li + li {
    margin-top: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-md);
    text-align: center;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

@keyframes floatBubbles {
    from {
        transform: translateY(0);
    }
    to {
        transform: translateY(-20px);
    }
}

@media (max-width: 1024px) {
    .navbar {
        flex-direction: column;
        min-height: auto;
        padding: var(--spacing-sm) 0;
        gap: var(--spacing-sm);
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: var(--spacing-sm);
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 767px) {
    .nav-menu {
        flex-direction: column;
    }

    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .hero-ningxia {
        text-align: center;
    }

    .hero-actions {
        justify-content: center;
    }

    .timeline {
        padding-left: var(--spacing-lg);
    }

    .timeline::before {
        left: 6px;
    }

    .timeline-item::before {
        left: -12px;
    }
}