/* ===========================
   Reset & Base Styles
   =========================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
    line-height: 1.8;
    color: #333;
    background: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===========================
   Header & Navigation
   =========================== */
header {
    background: linear-gradient(135deg, #2c5f2d 0%, #3d8b40 100%);
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
    font-weight: 500;
}

.nav-links a:hover {
    opacity: 0.8;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: all 0.3s;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    background: linear-gradient(135deg, #2c5f2d 0%, #3d8b40 100%);
    color: white;
    padding: 150px 2rem 100px;
    margin-top: 70px;
    text-align: center;
}

.hero-content {
    max-width: 1200px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.95;
    margin-bottom: 0.5rem;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-services {
    font-size: 1.1rem;
    margin: 1.5rem 0;
}

.license-number {
    font-size: 1rem;
    opacity: 0.9;
    margin: 1.5rem 0;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.1);
    border-radius: 5px;
    display: inline-block;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.cta-button {
    display: inline-block;
    margin-top: 1rem;
    padding: 15px 40px;
    background: white;
    color: #2c5f2d;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

/* ===========================
   Section Styles
   =========================== */
.section {
    padding: 60px 0;
    background: white;
    margin-bottom: 2rem;
}

.section-title {
    font-size: 2rem;
    color: #2c5f2d;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 3px solid #3d8b40;
}

.section-subtitle {
    color: #666;
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

/* ===========================
   Company Info Section
   =========================== */
.company-info {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    border-left: 4px solid #3d8b40;
}

.intro-text {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.info-item {
    display: flex;
    align-items: flex-start;
}

.info-label {
    font-weight: bold;
    color: #2c5f2d;
    min-width: 150px;
}

.info-value {
    color: #555;
}

/* ===========================
   Business Scope Section
   =========================== */
.business-scope {
    background: white;
}

.scope-intro {
    background: linear-gradient(135deg, #e8f5e9 0%, #f5f5f5 100%);
    padding: 2rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    border-left: 4px solid #3d8b40;
}

.scope-intro h3 {
    color: #2c5f2d;
    margin-bottom: 1rem;
}

.scope-intro p {
    color: #555;
    line-height: 1.8;
}

.scope-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.scope-card {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 3px solid #3d8b40;
    text-align: center;
}

.scope-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.scope-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.scope-card h3 {
    color: #2c5f2d;
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.scope-card p {
    color: #666;
    line-height: 1.6;
}

.business-highlight {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    padding: 3rem 2rem;
    border-radius: 15px;
    text-align: center;
    margin: 2rem 0;
    border: 2px solid #3d8b40;
}

.business-icon {
    font-size: 5rem;
    margin-bottom: 1rem;
}

.business-highlight h3 {
    color: #2c5f2d;
    font-size: 2rem;
    margin-bottom: 1rem;
}

.business-highlight p {
    color: #555;
    font-size: 1.1rem;
}

/* ===========================
   Products Section
   =========================== */
.products-section {
    background: #f8f9fa;
}

.products-intro {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    margin-bottom: 3rem;
    border-left: 4px solid #3d8b40;
}

.products-intro p {
    color: #555;
    line-height: 1.8;
    font-size: 1.05rem;
}

.products-categories {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.category-section {
    background: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 3px 15px rgba(0,0,0,0.08);
}

.category-header {
    background: linear-gradient(135deg, #3d8b40 0%, #2c5f2d 100%);
    color: white;
    padding: 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.category-icon {
    font-size: 3rem;
}

.category-header h3 {
    font-size: 1.8rem;
    margin: 0;
}

.category-content {
    padding: 2rem;
}

.product-group {
    margin-bottom: 2.5rem;
}

.product-group:last-child {
    margin-bottom: 0;
}

.product-group h4 {
    color: #2c5f2d;
    font-size: 1.3rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e8f5e9;
}

.product-desc {
    color: #555;
    line-height: 1.8;
    margin-bottom: 1rem;
    text-align: justify;
}

.product-features {
    list-style: none;
    margin-top: 1rem;
}

.product-features li {
    padding: 0.8rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: #555;
    line-height: 1.6;
    border-bottom: 1px solid #f0f0f0;
}

.product-features li:last-child {
    border-bottom: none;
}

.product-features li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #3d8b40;
    font-weight: bold;
    font-size: 1.2rem;
}

.product-features strong {
    color: #2c5f2d;
}

/* ===========================
   Contact Section
   =========================== */
.contact-section {
    background: linear-gradient(135deg, #e8f5e9 0%, #f5f5f5 100%);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-info,
.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.contact-info h3,
.contact-form h3 {
    color: #2c5f2d;
    margin-bottom: 1.5rem;
}

.contact-item {
    padding: 1rem 0;
    border-bottom: 1px solid #e0e0e0;
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-label {
    font-weight: bold;
    color: #2c5f2d;
    margin-bottom: 0.5rem;
}

.contact-value {
    color: #555;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #3d8b40;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.submit-btn {
    background: #3d8b40;
    color: white;
    padding: 12px 40px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s, transform 0.3s;
    width: 100%;
}

.submit-btn:hover {
    background: #2c5f2d;
    transform: translateY(-2px);
}

/* ===========================
   Notice Box
   =========================== */
.notice-box {
    background: #fff9c4;
    padding: 1.5rem;
    border-radius: 10px;
    border-left: 4px solid #f9a825;
    margin: 2rem 0;
}

.notice-box h4 {
    color: #f57c00;
    margin-bottom: 0.5rem;
}

.notice-box p {
    color: #555;
    font-size: 0.95rem;
}

/* ===========================
   Footer
   =========================== */
footer {
    background: #1a1a1a;
    color: white;
    padding: 3rem 2rem 2rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    margin-bottom: 1rem;
    color: #fff;
}

.footer-section p,
.footer-section a {
    color: #ccc;
    text-decoration: none;
    display: block;
    padding: 0.3rem 0;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #333;
    color: #999;
}

.footer-disclaimer {
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

/* ===========================
   Back to Top Button
   =========================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: #3d8b40;
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: #2c5f2d;
    transform: translateY(-5px);
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1200px) {
    .category-content {
        padding: 1.5rem;
    }
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .category-header {
        padding: 1.5rem;
    }

    .category-header h3 {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

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

    .container {
        padding: 0 1rem;
    }

    nav {
        padding: 0 1rem;
    }

    .hero {
        padding: 120px 1rem 60px;
    }

    .section {
        padding: 40px 0;
    }

    .category-header {
        flex-direction: column;
        text-align: center;
        padding: 1.5rem 1rem;
    }

    .category-content {
        padding: 1rem;
    }

    .product-group h4 {
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .hero p {
        font-size: 0.9rem;
    }

    .license-number {
        font-size: 0.85rem;
    }

    .cta-button {
        padding: 12px 30px;
    }

    .section-title {
        font-size: 1.3rem;
    }

    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
        bottom: 20px;
        right: 20px;
    }

    .category-icon {
        font-size: 2.5rem;
    }

    .category-header h3 {
        font-size: 1.2rem;
    }

    .product-features li {
        font-size: 0.9rem;
    }
}