:root {
    --color-yellow-light: #fff8b5;
    --color-green-light: #b5ff7d;
    --color-green-mid: #52d681;
    --color-green-deep: #00ad7c;
    --color-white: #ffffff;
    --color-dark: #1a3328;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    min-width: 320px;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.4s ease-in;
}

img[loading="lazy"].loaded {
    opacity: 1;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-green-deep);
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    width: 100%;
    background: var(--color-green-deep);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
    height: 64px;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    color: #fff;
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.header-logo-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    font-weight: 900;
    flex-shrink: 0;
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.header-nav a {
    color: rgba(255,255,255,0.9);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition);
    white-space: nowrap;
}

.header-nav a:hover,
.header-nav a.active {
    background: rgba(255,255,255,0.2);
    color: #fff;
}

.header-nav a.active {
    background: rgba(255,255,255,0.28);
    font-weight: 600;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
    flex-direction: column;
    gap: 5px;
    width: 36px;
    height: 30px;
    justify-content: center;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background: #fff;
    border-radius: 3px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.menu-toggle.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.menu-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.menu-toggle.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

.hero {
    background: linear-gradient(160deg, #00ad7c 0%, #52d681 40%, #b5ff7d 80%, #fff8b5 100%);
    padding: 60px 20px 70px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -60px; right: -80px;
    width: 280px; height: 280px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -40px; left: -60px;
    width: 200px; height: 200px;
    background: rgba(255,255,255,0.06);
    border-radius: 50%;
    pointer-events: none;
}

.hero-inner {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    color: #fff;
    text-shadow: 0 2px 8px rgba(0,0,0,0.12);
    margin-bottom: 12px;
    letter-spacing: 1px;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: 28px;
    font-weight: 400;
    letter-spacing: 2px;
}

.hero-search {
    display: flex;
    max-width: 560px;
    margin: 0 auto;
    background: #fff;
    border-radius: 50px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.hero-search input {
    flex: 1;
    border: none;
    padding: 15px 22px;
    font-size: 1rem;
    outline: none;
    color: var(--color-gray-700);
    min-width: 0;
}

.hero-search input::placeholder { color: var(--color-gray-400); }

.hero-search button {
    background: var(--color-green-deep);
    color: #fff;
    border: none;
    padding: 15px 28px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    letter-spacing: 0.5px;
}

.hero-search button:hover { background: #008f66; }

.section { padding: 60px 0; }

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-tag {
    display: inline-block;
    background: var(--color-yellow-light);
    color: var(--color-green-deep);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.section-desc {
    color: var(--color-gray-500);
    font-size: 0.95rem;
    max-width: 600px;
    margin: 0 auto;
}

.about-section { background: #fff; }

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.about-image-wrapper {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    background: var(--color-green-light);
    aspect-ratio: 4/3;
}

.about-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.about-image-wrapper:hover img { transform: scale(1.04); }

.about-content h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 14px;
}

.about-content h2::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 50px; height: 3px;
    background: var(--color-green-deep);
    border-radius: 3px;
}

.about-content p {
    color: var(--color-gray-600);
    margin-bottom: 12px;
    line-height: 1.8;
    font-size: 0.95rem;
}

.about-stats {
    display: flex;
    gap: 30px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.about-stat {
    text-align: center;
    background: var(--color-yellow-light);
    border-radius: var(--radius);
    padding: 16px 20px;
    min-width: 80px;
    flex: 1;
}

.about-stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--color-green-deep);
    display: block;
    line-height: 1;
}

.about-stat-label {
    font-size: 0.8rem;
    color: var(--color-gray-600);
    margin-top: 4px;
}

.products-section { background: var(--color-gray-50); }

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.product-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.product-card-image {
    aspect-ratio: 4/3;
    overflow: hidden;
    background: #f0fdf4;
    position: relative;
}

.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.45s ease;
}

.product-card:hover .product-card-image img { transform: scale(1.06); }

.product-card-body {
    padding: 16px 18px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 6px;
}

.product-card-body .product-tag {
    display: inline-block;
    background: var(--color-green-light);
    color: #1a5c3a;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    align-self: flex-start;
    margin-top: auto;
}

.product-card-badge {
    position: absolute;
    top: 12px; left: 12px;
    background: var(--color-green-deep);
    color: #fff;
    padding: 4px 12px;
    border-radius: 14px;
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 2;
    letter-spacing: 0.5px;
}

.brand-section { background: #fff; padding: 50px 0; }

.brand-scroll {
    display: flex;
    gap: 30px;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    padding: 10px 0;
}

.brand-item {
    background: var(--color-gray-50);
    border-radius: var(--radius);
    padding: 20px 28px;
    text-align: center;
    transition: all var(--transition);
    min-width: 120px;
    border: 2px solid transparent;
}

.brand-item:hover {
    border-color: var(--color-green-mid);
    background: #fafff8;
    box-shadow: var(--shadow-md);
}

.brand-item img {
    width: 100px;
    height: 60px;
    object-fit: contain;
    margin: 0 auto 8px;
    filter: grayscale(30%);
    transition: filter var(--transition);
}

.brand-item:hover img { filter: grayscale(0%); }

.brand-item span {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gray-700);
}

.news-section { background: var(--color-gray-50); }

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.news-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.news-card-image {
    aspect-ratio: 16/10;
    overflow: hidden;
    background: #ecfdf5;
}

.news-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.45s ease;
}

.news-card:hover .news-card-image img { transform: scale(1.05); }

.news-card-body { padding: 18px; flex: 1; display: flex; flex-direction: column; }

.news-card-date {
    font-size: 0.78rem;
    color: var(--color-gray-400);
    margin-bottom: 6px;
}

.news-card-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 8px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-body p {
    font-size: 0.85rem;
    color: var(--color-gray-500);
    line-height: 1.6;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-author {
    font-size: 0.78rem;
    color: var(--color-green-deep);
    font-weight: 500;
    margin-top: 10px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.news-card-author-dot {
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--color-green-mid);
    display: inline-block;
}

.contact-section { background: #fff; }

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.contact-info {
    background: linear-gradient(135deg, #f0fdf4 0%, #fff8b5 100%);
    border-radius: var(--radius-lg);
    padding: 30px;
    border: 1px solid rgba(0,173,124,0.15);
}

.contact-info h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 20px;
}

.contact-info-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    color: var(--color-gray-700);
    font-size: 0.95rem;
    line-height: 1.6;
}

.contact-info-icon {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--color-green-deep);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-weight: 700;
    font-size: 1rem;
}

.contact-form {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
}

.contact-form h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 20px;
}

.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color var(--transition);
    outline: none;
    background: var(--color-gray-50);
    color: var(--color-gray-800);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--color-green-mid);
    background: #fff;
}

.form-group textarea { resize: vertical; min-height: 100px; }

.btn-submit {
    background: var(--color-green-deep);
    color: #fff;
    border: none;
    padding: 13px 32px;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: 0.5px;
    width: 100%;
}

.btn-submit:hover {
    background: #008f66;
    box-shadow: var(--shadow-lg);
}

.footer {
    width: 100%;
    background: var(--color-green-deep);
    color: rgba(255,255,255,0.9);
    padding: 40px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-col h4 {
    color: #fff;
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 30px; height: 2px;
    background: var(--color-green-light);
    border-radius: 2px;
}

.footer-col ul { list-style: none; }

.footer-col ul li { margin-bottom: 8px; }

.footer-col ul li a {
    color: rgba(255,255,255,0.75);
    font-size: 0.9rem;
    transition: all var(--transition);
}

.footer-col ul li a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-bottom {
    width: 100%;
    border-top: 1px solid rgba(255,255,255,0.2);
    margin-top: 30px;
    padding: 20px;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.65);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 16px;
}

.footer-bottom a {
    color: rgba(255,255,255,0.85);
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color var(--transition);
}

.footer-bottom a:hover { color: #fff; }

.footer-mobile-link {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    padding: 8px 18px;
    border-radius: 20px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: all var(--transition);
}

.footer-mobile-link:hover { background: rgba(255,255,255,0.28); color: #fff; }

@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; gap: 24px; }
    .about-image-wrapper { aspect-ratio: 16/9; max-height: 360px; }
    .contact-grid { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 768px) {
    .header-inner { height: 56px; }
    .header-logo { font-size: 1rem; }
    .header-logo-icon { width: 34px; height: 34px; font-size: 1.1rem; }
    .menu-toggle { display: flex; }
    .header-nav {
        position: fixed;
        top: 0; right: -100%;
        width: 75%; max-width: 340px;
        height: 100vh;
        background: var(--color-green-deep);
        flex-direction: column;
        padding: 80px 30px 30px;
        gap: 8px;
        transition: right 0.35s cubic-bezier(0.4,0,0.2,1);
        box-shadow: -4px 0 20px rgba(0,0,0,0.25);
        z-index: 1000;
    }
    .header-nav.open { right: 0; }
    .header-nav a { font-size: 1.05rem; padding: 12px 16px; display: block; border-radius: var(--radius-sm); }
    .hero { padding: 40px 16px 50px; }
    .hero h1 { font-size: 1.5rem; }
    .hero-subtitle { font-size: 0.9rem; letter-spacing: 1px; }
    .hero-search { flex-direction: column; border-radius: var(--radius); overflow: hidden; }
    .hero-search input { padding: 13px 16px; border-radius: 0; }
    .hero-search button { padding: 13px; border-radius: 0; width: 100%; }
    .section { padding: 40px 0; }
    .section-title { font-size: 1.35rem; }
    .products-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; }
    .product-card-body { padding: 12px; }
    .product-card-body h3 { font-size: 0.9rem; }
    .news-grid { grid-template-columns: 1fr; gap: 16px; }
    .brand-scroll { gap: 14px; }
    .brand-item { padding: 14px 16px; min-width: 90px; }
    .brand-item img { width: 70px; height: 44px; }
    .brand-item span { font-size: 0.75rem; }
    .about-stats { gap: 12px; }
    .about-stat { padding: 12px 14px; min-width: 60px; }
    .about-stat-number { font-size: 1.4rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
    .footer-bottom { flex-direction: column; gap: 10px; font-size: 0.78rem; }
}

@media (max-width: 480px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .product-card-image { aspect-ratio: 1/1; }
    .product-card-body h3 { font-size: 0.82rem; }
    .product-card-body .product-tag { font-size: 0.68rem; padding: 2px 8px; }
    .footer-grid { grid-template-columns: 1fr; gap: 16px; }
    .header-logo { font-size: 0.85rem; }
    .contact-info, .contact-form { padding: 18px; }
}

.menu-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    transition: opacity 0.3s ease;
}
.menu-overlay.show { display: block; }