/* ================================== 
   Core Styles & Variables
   ================================== */
:root {
    /* Color Scheme */
    --primary-color: #1A3E6F;    /* Deep Sea Blue - Primary Brand Color */
    --secondary-color: #E3B34C;  /* Champagne Gold - Accent Color */
    --background-color: #F8F9FA; /* Light Gray White - Background */
    --accent-color: #4CAF50;     /* Business Green - Success/Growth Indicator */
    --text-dark: #333333;        /* Dark Gray - Main Text */
    --text-medium: #555555;      /* Medium Gray - Secondary Text */
    --text-light: #777777;       /* Light Gray - Tertiary Text */
    --white: #FFFFFF;            /* White - For Contrast Elements */
    --light-gray: #EEEEEE;       /* Light Gray - For Borders */
    --error-color: #D32F2F;      /* Red - For Error Messages */
    
    /* Typography */
    --font-title-cn: 'Noto Sans SC', sans-serif;
    --font-body-cn: 'Noto Sans SC', sans-serif;
    --font-title-en: 'Montserrat', sans-serif;
    --font-body-en: 'Lato', sans-serif;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-xxl: 48px;
    
    /* Borders */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Container widths */
    --container-max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body-cn);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--background-color);
    overflow-x: hidden;
}

ul, ol {
    list-style: none;
}

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

a:hover {
    color: var(--secondary-color);
}

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

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

/* ================================== 
   Typography
   ================================== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-title-cn);
    font-weight: 500;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-md);
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    text-align: center;
    color: var(--text-medium);
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.separator {
    width: 80px;
    height: 3px;
    background-color: var(--secondary-color);
    margin: var(--spacing-md) auto var(--spacing-lg);
}

/* ================================== 
   Buttons & CTAs
   ================================== */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: var(--border-radius-md);
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
    border: none;
    font-family: var(--font-title-cn);
}

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

.btn-primary:hover {
    background-color: #15325A;  /* Darker shade of primary */
    color: var(--white);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--text-dark);
}

.btn-secondary:hover {
    background-color: #D1A43C;  /* Darker shade of secondary */
    color: var(--text-dark);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

/* CTA Button Container */
.cta-button {
    text-align: center;
    margin: var(--spacing-xl) 0;
}

/* ================================== 
   Header & Navigation
   ================================== */
#site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

#site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

#site-header.scrolled {
    height: 60px;
    box-shadow: var(--shadow-md);
}

/* Logo */
.logo {
    flex: 0 0 auto;
}

.logo img {
    height: 50px;
    transition: var(--transition-normal);
}

#site-header.scrolled .logo img {
    height: 40px;
}

/* Main Navigation */
.main-nav {
    flex: 1 1 auto;
    display: flex;
    justify-content: flex-end;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-links li {
    position: relative;
}

.nav-links a {
    display: block;
    font-weight: 500;
    color: var(--text-dark);
    padding: var(--spacing-sm) 0;
}

.nav-links a:hover,
.nav-links .active > a {
    color: var(--primary-color);
}

/* Submenu */
.has-submenu {
    position: relative;
}

.submenu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-normal);
    z-index: 100;
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-sm) 0;
}

.has-submenu:hover .submenu,
.has-submenu.show-submenu .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.submenu li {
    padding: 0;
}

.submenu a {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 400;
    white-space: nowrap;
}

.submenu a:hover {
    background-color: rgba(0, 0, 0, 0.03);
}

/* Mobile Menu Button */
.mobile-menu-toggle {
    display: none;
    width: 30px;
    height: 24px;
    position: relative;
    cursor: pointer;
    z-index: 1010;
}

.mobile-menu-toggle span {
    display: block;
    position: absolute;
    height: 2px;
    width: 100%;
    background: var(--primary-color);
    left: 0;
    transition: var(--transition-fast);
}

.mobile-menu-toggle span:nth-child(1) {
    top: 0;
}

.mobile-menu-toggle span:nth-child(2) {
    top: 11px;
}

.mobile-menu-toggle span:nth-child(3) {
    top: 22px;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 11px;
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: 11px;
}

/* Language Switcher */
.language-switcher {
    position: relative;
    margin-right: var(--spacing-xl);
}

.current-lang {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-md);
    transition: var(--transition-normal);
    gap: 8px;
}

.current-lang:after {
    content: '';
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 6px;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--text-medium);
}

.current-lang:hover {
    background-color: var(--light-gray);
}

.current-lang img {
    width: 24px;
    height: 18px;
    margin-right: var(--spacing-sm);
    display: inline-block;
    vertical-align: middle;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-sm);
    min-width: 180px;
    padding: var(--spacing-md) 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition-normal);
    z-index: 100;
}

.lang-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-dropdown li {
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    color: var(--text-dark);
    cursor: pointer;
    transition: var(--transition-normal);
    gap: 8px;
}

.lang-dropdown li:hover {
    background-color: rgba(0, 0, 0, 0.03);
}

.lang-dropdown a {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--text-dark);
}

.lang-dropdown a:hover {
    background-color: rgba(0, 0, 0, 0.03);
}

.lang-dropdown img {
    width: 24px;
    height: 18px;
    margin-right: var(--spacing-md);
    vertical-align: middle;
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.lang-dropdown span {
    margin-left: var(--spacing-xs);
    white-space: nowrap;
}

/* ================================== 
   Hero Carousel
   ================================== */
.hero-carousel {
    width: 100%;
    height: 80vh;
    margin-top: 80px;
    overflow: hidden;
}

.swiper {
    width: 100%;
    height: 100%;
}

.swiper-slide {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.slide-1 {
    background-image: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('../images/hero-1.jpg');
}

.slide-2 {
    background-image: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('../images/hero-2.jpg');
}

.slide-3 {
    background-image: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('../images/hero-3.jpg');
}

.slide-content {
    text-align: center;
    color: var(--white);
    max-width: 800px;
    padding: 0 var(--spacing-xl);
    z-index: 10;
}

.slide-content h1 {
    font-size: 3rem;
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    color: var(--white);
}

.slide-content p {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xl);
}

.swiper-button-next,
.swiper-button-prev {
    color: var(--white) !important;
}

.swiper-pagination-bullet {
    width: 12px;
    height: 12px;
    background: var(--white);
    opacity: 0.7;
}

.swiper-pagination-bullet-active {
    opacity: 1;
    background: var(--secondary-color);
}

/* ================================== 
   Core Services Section
   ================================== */
.core-services {
    padding: var(--spacing-xxl) 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.service-card {
    background-color: var(--white);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-xl);
    text-align: center;
    position: relative;
    transition: var(--transition-normal);
    overflow: hidden;
}

.service-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-5px);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
}

.service-icon svg {
    width: 100%;
    height: 100%;
    fill: var(--primary-color);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
}

.service-card p {
    color: var(--text-medium);
    margin-bottom: var(--spacing-lg);
}

.read-more {
    color: var(--primary-color);
    font-weight: 500;
    position: relative;
    cursor: pointer;
}

.read-more:after {
    content: "";
    display: inline-block;
    width: 6px;
    height: 6px;
    border-right: 2px solid var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    margin-left: var(--spacing-xs);
    transform: rotate(45deg);
    position: relative;
    top: -2px;
    transition: var(--transition-normal);
}

.service-details {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: var(--transition-normal);
}

.service-card.show-details .service-details {
    max-height: 200px;
    opacity: 1;
    margin-top: var(--spacing-md);
}

.service-details ul {
    text-align: left;
    padding-left: var(--spacing-md);
}

.service-details li {
    position: relative;
    padding: var(--spacing-xs) 0;
    color: var(--text-medium);
}

.service-details li:before {
    content: "•";
    color: var(--secondary-color);
    font-weight: bold;
    display: inline-block;
    width: 1em;
    margin-left: -1em;
}

/* ================================== 
   Contact CTA Section
   ================================== */
.contact-cta {
    background-image: linear-gradient(rgba(26, 62, 111, 0.9), rgba(26, 62, 111, 0.9)), url('../images/cta-bg.jpg');
    background-size: cover;
    background-position: center;
    padding: var(--spacing-xxl) 0;
    color: var(--white);
    text-align: center;
}

.cta-content h2 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    font-size: 1.2rem;
}

/* ================================== 
   Footer
   ================================== */
#site-footer {
    background-color: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo {
    max-width: 180px;
    margin-bottom: var(--spacing-md);
}

.footer-col p {
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.8);
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: var(--transition-normal);
}

.social-links a:hover {
    background-color: var(--secondary-color);
}

.social-links img {
    width: 18px;
    height: 18px;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: var(--spacing-lg);
    font-size: 1.2rem;
    position: relative;
}

.footer-col h4:after {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--secondary-color);
}

.footer-col ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-col ul a {
    color: rgba(255, 255, 255, 0.8);
    transition: var(--transition-normal);
}

.footer-col ul a:hover {
    color: var(--secondary-color);
    padding-left: var(--spacing-sm);
}

.footer-col address p {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
}

.footer-col address img {
    margin-right: var(--spacing-sm);
    width: 16px;
    height: 16px;
    position: relative;
    top: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* ================================== 
   Page Banner
   ================================== */
.page-banner {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 150px 0 var(--spacing-xxl);
    text-align: center;
}

.page-banner h1 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
}

.breadcrumb {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-md);
}

.breadcrumb li {
    display: flex;
    align-items: center;
}

.breadcrumb li:not(:last-child):after {
    content: "/";
    margin-left: var(--spacing-md);
    color: rgba(255, 255, 255, 0.6);
}

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

/* ================================== 
   Forms
   ================================== */
.form-group {
    margin-bottom: var(--spacing-lg);
}

label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

input, 
textarea, 
select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-body-cn);
    font-size: 1rem;
    transition: var(--transition-normal);
}

input:focus, 
textarea:focus, 
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(26, 62, 111, 0.1);
}

.form-checkbox {
    display: flex;
    align-items: center;
}

.form-checkbox input {
    width: auto;
    margin-right: var(--spacing-sm);
}

.form-submit {
    text-align: center;
    margin-top: var(--spacing-xl);
}

input.error, 
textarea.error, 
select.error {
    border-color: var(--error-color);
}

/* Success message */
.form-success-message {
    display: none;
    text-align: center;
    padding: var(--spacing-xxl) 0;
}

.success-icon {
    width: 80px;
    height: 80px;
    line-height: 80px;
    text-align: center;
    background-color: var(--accent-color);
    color: var(--white);
    font-size: 2.5rem;
    border-radius: 50%;
    margin: 0 auto var(--spacing-lg);
}

/* Form loading state */
.form.submitting {
    opacity: 0.7;
    pointer-events: none;
}

/* Required field marker */
.required {
    color: var(--error-color);
}

/* Contact form specific styles */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.full-width {
    grid-column: 1 / -1;
}

/* ================================== 
   Services Circles
   ================================== */
.service-circles {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin: var(--spacing-xl) 0;
    gap: var(--spacing-lg);
}

.service-circle {
    flex: 1;
    min-width: 180px;
    max-width: 230px;
    margin: 0 auto;
}

.circle-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    text-decoration: none;
    color: var(--text-dark);
    transition: var(--transition-normal);
}

.circle-link:hover {
    transform: translateY(-5px);
}

.circle-icon {
    width: 140px;
    height: 140px;
    border-radius: 50%;
    background-color: var(--white);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    transition: var(--transition-normal);
    border: 2px solid transparent;
    overflow: hidden;
}

.circle-link:hover .circle-icon {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
    background-color: rgba(26, 62, 111, 0.05);
}

.circle-icon svg {
    width: 60px;
    height: 60px;
    fill: var(--primary-color);
    transition: var(--transition-normal);
}

.circle-link:hover .circle-icon svg {
    fill: var(--accent-color);
    transform: scale(1.1);
}

.service-circle h3 {
    font-size: 1.2rem;
    margin-top: var(--spacing-sm);
    font-weight: 500;
    color: var(--primary-color);
}

.circle-link:hover h3 {
    color: var(--accent-color);
}

/* Add these styles to your existing responsive.css to ensure mobile responsiveness */
@media (max-width: 767.98px) {
    .service-circles {
        justify-content: center;
        gap: var(--spacing-xl);
    }
    
    .service-circle {
        flex: 0 0 40%;
    }
}

@media (max-width: 575.98px) {
    .service-circle {
        flex: 0 0 100%;
    }
}