:root {
    --primary: #0f172a; /* Midnight Slate */
    --secondary: #af8f5c; /* Champagne Gold */
    --accent: #af8f5c;
    --bg-light: #fdfcf8; /* Soft Cream */
    --bg-dark: #0f172a;
    --text-main: #1e293b;
    --text-muted: #475569;
    --white: #ffffff;
    --gold: #af8f5c;
    --transition: cubic-bezier(0.4, 0, 0.2, 1) 0.4s;
}

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

body {
    font-family: 'Noto Sans SC', 'Outfit', sans-serif;
    color: var(--text-main);
    line-height: 1.6;
    background-color: var(--white);
    overflow-x: hidden;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 100px 0;
}

.section.bg-light { background-color: var(--bg-light); }
.section.bg-dark { background-color: var(--bg-dark); }

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: -1px;
    color: var(--primary);
    margin-bottom: 15px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--accent);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 700px;
    margin: 0 auto;
}

.text-white { color: var(--white); }

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 34px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gold);
    color: var(--white);
    letter-spacing: 1px;
    border-radius: 4px; /* More professional, less "pill-like" */
}

.btn-primary:hover {
    background: #967a4e;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(175, 143, 92, 0.2);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 4px;
}

.btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--white);
}

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

.btn.block {
    display: block;
    width: 100%;
}

.btn-phone {
    background: rgba(0, 168, 150, 0.1);
    color: var(--secondary);
    padding: 10px 20px;
    font-size: 0.9rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(20px);
    z-index: 1000;
    padding: 20px 0;
    border-bottom: 1px solid rgba(175, 143, 92, 0.2);
}

.logo {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 4px;
    color: var(--white);
}

.nav-links a {
    margin-left: 35px;
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--white);
    opacity: 0.8;
}

.nav-links a:hover {
    color: var(--gold);
    opacity: 1;
}

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

.header-cta {
    display: flex;
    align-items: center;
    gap: 20px;
}

.wechat-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #07c160;
    color: white;
    padding: 6px 15px;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
}

.wechat-badge img {
    width: 20px;
    height: 20px;
    filter: brightness(0) invert(1);
}

/* Hero Section */
.hero {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    z-index: -1;
    transform: scale(1.05);
    animation: zoomAction 20s infinite alternate;
}

@keyframes zoomAction {
    from { transform: scale(1.05); }
    to { transform: scale(1.15); }
}

.hero-content {
    text-align: center;
}

.hero-text-box {
    max-width: 800px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero-subtitle {
    font-size: 1.4rem;
    margin-bottom: 40px;
    opacity: 0.9;
    letter-spacing: 1px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
}

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

/* Why Us Section */
.why-us-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.why-card {
    padding: 40px 30px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    text-align: center;
    transition: var(--transition);
    border: 1px solid #efefef;
}

.why-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(26, 58, 95, 0.1);
    border-color: var(--secondary);
}

.why-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.why-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--primary);
}

.why-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Services */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: 0; /* Professional sharp corners */
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0,0,0,0.03);
    transition: var(--transition);
    border-top: 5px solid var(--gold);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(15, 23, 42, 0.08);
}

.service-img {
    height: 300px;
    background-size: cover;
    background-position: center;
    filter: brightness(0.95) contrast(1.05); /* Natural High-End look */
    transition: var(--transition);
}

.service-card:hover .service-img {
    filter: none; /* Reveal color on hover */
}

.service-content {
    padding: 30px;
}

.service-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--primary);
}

.service-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Equipment Section */
.equipment-showcase {
    display: flex;
    gap: 50px;
    align-items: center;
    background: var(--bg-light);
    padding: 60px;
    border-radius: 30px;
    box-shadow: inset 0 0 20px rgba(0,0,0,0.02);
}

.equipment-main {
    flex: 1;
}

.equipment-main img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 20px 20px 60px rgba(0,0,0,0.1);
}

.equipment-list {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.eq-item {
    border-bottom: 1px solid #ddd;
    padding-bottom: 20px;
}

.eq-name {
    display: block;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.eq-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

@media (max-width: 968px) {
    .equipment-showcase { flex-direction: column; padding: 30px; }
    .equipment-list { grid-template-columns: 1fr; }
}

/* Team Showcase */
.team-showcase {
    display: flex;
    justify-content: center;
}

.team-card {
    display: flex;
    background: var(--white);
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.05);
    overflow: hidden;
    max-width: 900px;
    padding: 40px;
    gap: 50px;
    align-items: center;
}

.team-img-wrapper {
    flex: 1;
    max-width: 300px;
}

.team-img-wrapper img {
    width: 100%;
    border-radius: 0;
    filter: brightness(0.98) contrast(1.02); /* Natural Expert Profile */
    border-left: 20px solid var(--gold);
    transition: var(--transition);
}

.team-card:hover img {
    filter: none;
}

.team-info {
    flex: 2;
}

.team-info h3 {
    font-size: 1.8rem;
    color: var(--primary);
    margin-bottom: 5px;
}

.team-pos {
    color: var(--secondary);
    font-weight: 600;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.team-qual {
    list-style: none;
}

.team-qual li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 12px;
    color: var(--text-muted);
}

.team-qual li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary);
    font-weight: bold;
}

/* Testimonials */
.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background: rgba(255,255,255,0.05);
    padding: 40px;
    border-radius: 15px;
    border-left: 5px solid var(--secondary);
    transition: var(--transition);
}

.testimonial-card:hover {
    background: rgba(255,255,255,0.1);
}

.stars {
    color: var(--accent);
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.quote {
    font-style: italic;
    font-size: 1.1rem;
    color: var(--white);
    margin-bottom: 20px;
}

.author {
    display: block;
    color: var(--accent);
    font-weight: 600;
}

/* Contact Flex */
.contact-flex {
    display: flex;
    gap: 60px;
    align-items: flex-start;
}

.contact-info {
    flex: 1;
}

.contact-title {
    font-size: 2.2rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.services-labels {
    margin: 30px 0;
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.label-item {
    background: #e8f5f4;
    color: var(--secondary);
    padding: 8px 15px;
    border-radius: 5px;
    font-weight: 600;
    font-size: 0.9rem;
}

.qr-box {
    margin-top: 40px;
    background: var(--bg-light);
    padding: 30px;
    border-radius: 15px;
    text-align: center;
}

.qr-box img {
    width: 150px;
    margin: 20px 0;
    border-radius: 10px;
}

.qr-box p {
    font-weight: 600;
}

.qr-box span {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.contact-form-box {
    flex: 1;
    background: var(--white);
    padding: 50px;
    border-radius: 20px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--secondary);
    box-shadow: 0 0 10px rgba(0, 168, 150, 0.1);
}

/* Footer */
.footer {
    background: #0d1a2b;
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: 50px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 60px;
}

.footer-left h3 {
    margin-bottom: 20px;
    color: var(--accent);
}

.traffic-guide {
    margin-top: 30px;
}

.traffic-guide h4 {
    margin-bottom: 10px;
    color: var(--secondary);
}

.traffic-guide p {
    font-size: 0.9rem;
    opacity: 0.8;
    margin-bottom: 5px;
}

.footer-right {
    text-align: right;
}

.footer-logo {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.footer-right p {
    opacity: 0.6;
    font-size: 0.85rem;
    margin-bottom: 5px;
}

.social-links {
    margin-top: 20px;
    color: var(--accent);
}

/* Mobile Responsive */
@media (max-width: 968px) {
    .navbar .nav-links { display: none; }
    .hero-title { font-size: 2.5rem; }
    .team-card { flex-direction: column; text-align: center; }
    .contact-flex { flex-direction: column; }
    .footer-content { flex-direction: column; text-align: left; }
    .footer-right { text-align: left; }
}

/* AI Chatbot Widget Premium Styling */
.chatbot-widget {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 9999;
    font-family: inherit;
}

.shadow-premium {
    box-shadow: 0 15px 40px rgba(15, 23, 42, 0.2), 0 5px 15px rgba(175, 143, 92, 0.1);
}

.chatbot-toggle {
    background: var(--primary);
    color: var(--gold);
    border: 2px solid var(--gold);
    padding: 12px 24px;
    border-radius: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
}

.chatbot-toggle:hover {
    transform: scale(1.05);
    background: var(--gold);
    color: var(--white);
    border-color: var(--primary);
}

.chatbot-window {
    position: absolute;
    bottom: 70px;
    right: 0;
    width: 350px;
    height: 500px;
    background: var(--white);
    border-radius: 12px;
    border: 1px solid rgba(175, 143, 92, 0.3);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease;
    transform-origin: bottom right;
}

.chatbot-window.hidden {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

.chatbot-header {
    background: var(--primary);
    color: var(--white);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 3px solid var(--gold);
}

.chatbot-header h4 {
    margin: 0;
    font-size: 1.1rem;
    letter-spacing: 1px;
}

.chatbot-header p {
    margin: 0;
    font-size: 0.8rem;
    color: var(--gold);
}

.chatbot-close {
    background: transparent;
    border: none;
    color: var(--white);
    font-size: 1.2rem;
    cursor: pointer;
    transition: var(--transition);
}

.chatbot-close:hover {
    color: var(--gold);
    transform: rotate(90deg);
}

.chatbot-lang-select {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--bg-light);
    padding: 30px;
    text-align: center;
}

.chatbot-lang-select h3 {
    color: var(--primary);
    margin-bottom: 25px;
    font-size: 1.1rem;
    line-height: 1.6;
}

.lang-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
    width: 100%;
}

.lang-btn {
    background: var(--white);
    color: var(--primary);
    border: 1px solid rgba(15, 23, 42, 0.2);
    padding: 15px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.lang-btn:hover {
    background: var(--gold);
    color: var(--white);
    border-color: var(--gold);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(175, 143, 92, 0.2);
}

.chatbot-interface {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.chatbot-interface.hidden, .chatbot-lang-select.hidden {
    display: none !important;
}

.chatbot-messages {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: var(--bg-light);
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.message {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 0.95rem;
    line-height: 1.5;
    animation: fadeIn 0.3s ease;
}

.bot-message {
    background: var(--white);
    color: var(--text-main);
    align-self: flex-start;
    border-bottom-left-radius: 2px;
    border: 1px solid rgba(15, 23, 42, 0.1);
}

.user-message {
    background: var(--gold);
    color: var(--white);
    align-self: flex-end;
    border-bottom-right-radius: 2px;
}

.chatbot-input {
    display: flex;
    padding: 15px;
    background: var(--white);
    border-top: 1px solid rgba(15, 23, 42, 0.1);
}

.chatbot-input input {
    flex: 1;
    border: 1px solid #ddd;
    padding: 10px 15px;
    border-radius: 20px;
    outline: none;
    font-family: inherit;
    transition: var(--transition);
}

.chatbot-input input:focus {
    border-color: var(--gold);
}

.chatbot-input button {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 0 20px;
    margin-left: 10px;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.chatbot-input button:hover {
    background: var(--gold);
}

.typing-indicator {
    color: var(--text-muted);
    font-size: 0.85rem;
    align-self: flex-start;
    margin-top: -5px;
    margin-bottom: 5px;
    font-style: italic;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .chatbot-window {
        bottom: 0;
        right: 0;
        width: 100vw;
        height: 100vh;
        position: fixed;
        border-radius: 0;
        z-index: 10000;
    }
}