/* ===================================
   东莞中元华信财税服务有限公司
   高端黑白灰风格样式表
   =================================== */

/* CSS Variables - 黑白灰主题 */
:root {
    --color-black: #1A1A1A;
    --color-dark-gray: #2C2C2C;
    --color-medium-gray: #4A4A4A;
    --color-light-gray: #8C8C8C;
    --color-silver: #B8B8B8;
    --color-light: #F5F5F5;
    --color-white: #FFFFFF;
    --color-gold: #D4AF37;
    
    --font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--color-dark-gray);
    background-color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-black);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 4px;
    font-weight: 500;
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-dark-gray);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-black);
    border-color: var(--color-black);
}

.btn-secondary:hover {
    background-color: var(--color-black);
    color: var(--color-white);
}

.btn-white {
    background-color: var(--color-white);
    color: var(--color-black);
}

.btn-white:hover {
    background-color: var(--color-light);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-white);
    border-color: var(--color-white);
}

.btn-outline:hover {
    background-color: var(--color-white);
    color: var(--color-black);
}

.btn-block {
    width: 100%;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-black);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-menu a {
    color: var(--color-dark-gray);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-black);
    transition: width var(--transition-normal);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-contact {
    display: flex;
    align-items: center;
}

.btn-phone {
    background-color: var(--color-black);
    color: var(--color-white);
    padding: 0.5rem 1.5rem;
    border-radius: 4px;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.btn-phone:hover {
    background-color: var(--color-dark-gray);
    transform: translateY(-2px);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--color-black);
    transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-light) 0%, var(--color-white) 100%);
    min-height: 90vh;
    display: flex;
    align-items: center;
    margin-top: 70px;
}

.hero-content {
    max-width: 800px;
}

.hero-title {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-black);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-medium-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Section Styles */
section {
    padding: var(--spacing-lg) 0;
}

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

.section-title {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-xs);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: var(--color-black);
    margin: var(--spacing-xs) auto 0;
}

.section-subtitle {
    color: var(--color-light-gray);
    font-size: 1.125rem;
}

/* Services Section */
.services {
    background-color: var(--color-white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background-color: var(--color-white);
    padding: var(--spacing-md);
    border: 1px solid var(--color-light);
    border-radius: 8px;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-black);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.service-card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--color-black);
}

.service-card > p {
    color: var(--color-medium-gray);
    margin-bottom: var(--spacing-sm);
}

.service-list {
    margin-top: var(--spacing-sm);
}

.service-list li {
    color: var(--color-dark-gray);
    padding: 0.25rem 0;
    font-size: 0.95rem;
}

/* About Section */
.about {
    background-color: var(--color-light);
}

.about-intro {
    font-size: 1.125rem;
    color: var(--color-medium-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.feature-icon {
    width: 40px;
    height: 40px;
    background-color: var(--color-black);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.feature-text h4 {
    margin-bottom: 0.25rem;
    color: var(--color-black);
}

.feature-text p {
    color: var(--color-medium-gray);
    font-size: 0.95rem;
}

/* CTA Section */
.cta {
    background-color: var(--color-black);
    color: var(--color-white);
    text-align: center;
}

.cta-content h2 {
    color: var(--color-white);
    margin-bottom: var(--spacing-xs);
}

.cta-content p {
    color: var(--color-silver);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* Contact Section */
.contact {
    background-color: var(--color-white);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.contact-icon {
    font-size: 1.5rem;
    width: 50px;
    height: 50px;
    background-color: var(--color-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-detail h4 {
    margin-bottom: 0.25rem;
    color: var(--color-black);
}

.contact-detail p {
    color: var(--color-medium-gray);
}

.contact-detail a {
    color: var(--color-black);
    font-weight: 500;
}

.contact-detail a:hover {
    color: var(--color-gold);
}

.wechat-qr {
    margin-top: var(--spacing-xs);
}

.qr-placeholder {
    width: 150px;
    height: 150px;
    background-color: var(--color-light);
    border: 2px dashed var(--color-silver);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-light-gray);
    border-radius: 8px;
}

/* Contact Form */
.contact-form-wrapper {
    background-color: var(--color-light);
    padding: var(--spacing-md);
    border-radius: 8px;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 0.5rem;
    color: var(--color-dark-gray);
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--color-silver);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color var(--transition-fast);
    background-color: var(--color-white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-black);
}

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

/* Footer */
.footer {
    background-color: var(--color-black);
    color: var(--color-silver);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-section h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.footer-section p {
    line-height: 1.8;
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-section ul a {
    color: var(--color-silver);
    transition: color var(--transition-fast);
}

.footer-section ul a:hover {
    color: var(--color-white);
}

.footer-bottom {
    border-top: 1px solid var(--color-dark-gray);
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    margin: 0.25rem 0;
    font-size: 0.875rem;
}

.footer-bottom a {
    color: var(--color-silver);
}

.footer-bottom a:hover {
    color: var(--color-white);
}

/* Floating Contact Buttons */
.floating-contact {
    position: fixed;
    bottom: 30px;
    right: 30px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 999;
}

.float-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    animation: pulse 2s infinite;
}

.float-phone {
    background-color: var(--color-black);
    color: var(--color-white);
}

.float-wechat {
    background-color: var(--color-white);
    color: var(--color-black);
    border: 2px solid var(--color-black);
}

.float-btn:hover {
    transform: scale(1.1);
}

@keyframes pulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(26, 26, 26, 0.4);
    }
    50% {
        box-shadow: 0 0 0 15px rgba(26, 26, 26, 0);
    }
}

/* Responsive Design */
@media (max-width: 992px) {
    .contact-wrapper {
        grid-template-columns: 1fr;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background-color: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-md);
        transition: left var(--transition-normal);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav-contact {
        display: none;
    }
    
    .hero {
        padding: var(--spacing-lg) 0 var(--spacing-md);
        min-height: auto;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .floating-contact {
        bottom: 20px;
        right: 20px;
    }
    
    .float-btn {
        width: 50px;
        height: 50px;
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.75rem;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .service-card {
        padding: var(--spacing-sm);
    }
}

/* Print Styles */
@media print {
    .header,
    .floating-contact,
    .cta {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: #000;
    }
    
    a {
        text-decoration: underline;
    }
}