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

:root {
    --primary: #0d9488;
    --primary-light: #14b8a6;
    --primary-dark: #0f766e;
    --primary-50: #f0fdfa;
    --primary-100: #ccfbf1;
    --primary-200: #99f6e4;
    --primary-300: #5eead4;
    --primary-400: #2dd4bf;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --text: #334155;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(13, 148, 136, 0.10);
    --shadow-lg: 0 12px 48px rgba(13, 148, 136, 0.15);
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 24px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: #fff;
    padding-left: 200px;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

.section-dark {
    background: var(--primary-50);
}

.section-light {
    background: #fff;
}

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 20px;
    background: var(--primary-100);
    color: var(--primary-dark);
    font-size: 14px;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.section-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 16px;
    line-height: 1.3;
}

.section-desc {
    font-size: 16px;
    color: var(--gray-500);
    line-height: 1.8;
}

/* ===== Sidebar ===== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 200px;
    height: 100vh;
    z-index: 1000;
    background: #ccfbf1;
    border-right: 1px solid var(--gray-100);
    display: flex;
    flex-direction: column;
    padding: 32px 24px;
    overflow-y: auto;
}

.sidebar-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 40px;
}

.sidebar-logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary-dark);
    line-height: 1.3;
}

.lang-switch {
    display: flex;
    gap: 4px;
    margin-bottom: 24px;
    padding: 0 16px;
}

.lang-btn {
    flex: 1;
    padding: 6px 0;
    font-size: 13px;
    font-weight: 600;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    background: transparent;
    color: var(--gray-500);
    cursor: pointer;
    transition: all 0.3s;
}

.lang-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.lang-btn:hover:not(.active) {
    border-color: var(--primary);
    color: var(--primary);
}

.sidebar-toggle,
.sidebar-close {
    display: none;
}

.mobile-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 999;
    flex-direction: column;
    gap: 5px;
    background: var(--primary);
    border: none;
    cursor: pointer;
    padding: 10px 12px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.mobile-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: all 0.3s;
}

.sidebar-close {
    background: none;
    border: none;
    font-size: 32px;
    color: var(--gray-500);
    cursor: pointer;
    line-height: 1;
    padding: 0 4px;
}

.sidebar-close:hover {
    color: var(--gray-800);
}

.sidebar-menu {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-menu a {
    display: block;
    padding: 12px 16px;
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-600);
    border-radius: 8px;
    transition: all 0.3s;
}

.sidebar-menu a:hover {
    color: var(--primary);
    background: var(--primary-50);
}

.sidebar-overlay {
    display: none;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background:  url('../images/1.jpg');
    background-size: cover;
    background-position: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(94, 234, 212, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(45, 212, 191, 0.12) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-title {
    font-size: 52px;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-highlight {
    background: linear-gradient(135deg, var(--primary-200), var(--primary-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 36px;
    line-height: 1.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-btns {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    transition: all 0.3s;
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background: #fff;
    color: var(--primary-dark);
}

.btn-primary:hover {
    background: var(--primary-100);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.7);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* ===== About ===== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 60px;
}

.about-card {
    text-align: center;
    padding: 40px 28px;
    background: #fff;
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    transition: all 0.4s;
}

.about-card:hover {
    border-color: var(--primary-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.about-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--primary-50);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.about-icon svg {
    width: 32px;
    height: 32px;
}

.about-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
}

.about-card p {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.7;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding: 48px 40px;
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    border-radius: var(--radius);
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 42px;
    font-weight: 800;
    color: var(--primary-dark);
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 15px;
    color: var(--gray-600);
    font-weight: 500;
}

/* ===== Business ===== */
.business-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.business-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.4s;
}

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

.business-img {
    height: 200px;
    background-size: cover;
    background-position: center;
}

.business-img-wholesale {
    background: linear-gradient(135deg, #0d9488, #0f766e);
    position: relative;
}

.business-img-wholesale::after {
    content: '🏭 批量供货';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 2px;
}

.business-img-retail {
    background: linear-gradient(135deg, #14b8a6, #0d9488);
    position: relative;
}

.business-img-retail::after {
    content: '🏪 零售终端';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 2px;
}

.business-body {
    padding: 32px;
}

.business-body h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 16px;
}

.business-body ul {
    margin-bottom: 16px;
}

.business-body li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    font-size: 15px;
    color: var(--gray-600);
}

.business-body li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: 700;
}

.business-note {
    font-size: 14px;
    color: var(--primary-dark);
    background: var(--primary-50);
    padding: 12px 16px;
    border-radius: 8px;
    font-weight: 500;
}

/* ===== Advantages ===== */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.adv-card {
    padding: 36px 28px;
    background: #fff;
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    transition: all 0.4s;
}

.adv-card:hover {
    border-color: var(--primary-200);
    box-shadow: var(--shadow);
    transform: translateY(-4px);
}

.adv-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-200);
    line-height: 1;
    margin-bottom: 16px;
}

.adv-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
}

.adv-card p {
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.7;
}

/* ===== Products ===== */
.product-category {
    margin-bottom: 40px;
}

.category-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 20px;
    padding-left: 4px;
    border-left: 4px solid var(--primary);
    padding-left: 16px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.product-card {
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    border: 1px solid var(--gray-100);
    transition: all 0.4s;
    cursor: pointer;
}

.product-card:hover {
    border-color: var(--primary-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.product-img {
    height: 180px;
    background-size: cover;
    background-position: center;
    background-color: var(--primary-50);
    transition: transform 0.6s;
}

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

.product-info {
    padding: 14px 12px;
    text-align: center;
}

.product-info h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 6px;
}

.product-info p {
    font-size: 14px;
    color: var(--gray-500);
}

/* ===== Partner ===== */
.partner-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 48px;
}

.partner-card {
    text-align: center;
    padding: 40px 28px;
    background: #fff;
    border-radius: var(--radius);
    border: 1px solid var(--gray-100);
    transition: all 0.4s;
}

.partner-card:hover {
    border-color: var(--primary-200);
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
}

.partner-icon {
    width: 68px;
    height: 68px;
    margin: 0 auto 20px;
    background: var(--primary-50);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.partner-icon svg {
    width: 32px;
    height: 32px;
}

.partner-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
}

.partner-card p {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.7;
    margin-bottom: 16px;
}

.partner-condition {
    font-size: 13px !important;
    color: var(--primary-dark) !important;
    background: var(--primary-50);
    padding: 10px 16px;
    border-radius: 8px;
    font-weight: 500;
}

.partner-cta {
    text-align: center;
    padding: 40px;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    border-radius: var(--radius);
    color: #fff;
}

.partner-cta p {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 24px;
}

.partner-cta .btn-primary {
    background: #fff;
    color: var(--primary-dark);
}

.partner-cta .btn-primary:hover {
    background: var(--primary-100);
}

/* ===== Contact ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    background: var(--primary-50);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

.contact-item h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-800);
    margin-bottom: 4px;
}

.contact-item p {
    font-size: 15px;
    color: var(--gray-500);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding: 36px;
    background: #fff;
    border: 1px solid var(--gray-100);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.3s;
    outline: none;
    background: var(--gray-50);
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
}

.contact-form textarea {
    resize: vertical;
}

.contact-form .btn-primary {
    background: var(--primary);
    color: #fff;
    padding: 16px;
}

.contact-form .btn-primary:hover {
    background: var(--primary-dark);
    transform: none;
    box-shadow: 0 4px 16px rgba(13, 148, 136, 0.3);
}

.contact-empty {
    text-align: center;
    padding: 60px 20px;
    background: var(--primary-50);
    border-radius: var(--radius);
}

.contact-empty p {
    font-size: 18px;
    color: var(--gray-500);
}

/* ===== Footer ===== */
.footer {
    background: var(--gray-900);
    color: rgba(255, 255, 255, 0.7);
    padding-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
}

.footer-brand .logo-icon {
    font-size: 32px;
}

.footer-brand span:not(.logo-icon) {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    margin-left: 8px;
}

.footer-brand p {
    margin-top: 16px;
    font-size: 15px;
    line-height: 1.8;
}

.footer-email {
    color: var(--primary-300) !important;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.footer-links h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 15px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--primary-300);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    text-align: center;
    font-size: 14px;
}

/* ===== Scroll Animation ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: repeat(2, 1fr); }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .section-title { font-size: 28px; }
    .hero-title { font-size: 34px; }

    .nav-top-row {
        justify-content: space-between;
    }

    .nav-toggle {
        display: flex;
    }

    body {
        padding-left: 0;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1001;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .sidebar-header {
        margin-bottom: 32px;
    }

    .mobile-toggle {
        display: flex;
    }

    .sidebar-close {
        display: block;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 1000;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .about-grid { grid-template-columns: 1fr; }
    .business-grid { grid-template-columns: 1fr; }
    .adv-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .partner-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .footer-content { grid-template-columns: 1fr; text-align: center; }
    .partner-cta { padding: 28px; }
    .partner-cta p { font-size: 17px; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 28px; }
    .hero-desc { font-size: 16px; }
    .btn { padding: 12px 28px; font-size: 15px; }
    .about-stats { padding: 32px 20px; }
    .stat-number { font-size: 32px; }
    .contact-form { padding: 24px; }
}