/* ===== CSS Variables ===== */
:root {
    --color-primary: #1a365d;
    --color-primary-light: #2c5282;
    --color-primary-dark: #142850;
    --color-accent: #c9a962;
    --color-accent-light: #d4b87a;
    --color-bg: #fdfcfa;
    --color-bg-warm: #f8f6f1;
    --color-bg-card: #ffffff;
    --color-text: #2d3748;
    --color-text-light: #718096;
    --color-border: #e2e0dc;
    --font-display: 'Cormorant Garamond', 'Noto Serif SC', serif;
    --font-body: 'Noto Sans SC', -apple-system, sans-serif;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.8;
    font-weight: 400;
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

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

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.5rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.25rem 4%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.nav.scrolled {
    background: rgba(253, 252, 250, 0.97);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 var(--color-border);
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

.nav-logo span {
    color: var(--color-accent);
}

.nav-logo img {
    display: inline;
    height: 84px;
    width: auto;
    margin-right: 0.5rem;
    vertical-align: middle;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    font-size: 0.9rem;
    color: var(--color-text);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 0.5rem 0;
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

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

/* Dropdown */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    left: -1rem;
    background: white;
    min-width: 200px;
    padding: 0.75rem 0;
    border-radius: 4px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown-menu a {
    display: block;
    padding: 0.75rem 1.5rem;
    font-size: 0.9rem;
}

.nav-dropdown-menu a:hover {
    background: var(--color-bg);
    color: var(--color-primary);
}

.nav-dropdown-menu a::after {
    display: none;
}

.nav-cta {
    padding: 0.75rem 1.75rem;
    background: var(--color-primary);
    color: white !important;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 2px;
    transition: var(--transition);
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
}

/* Mobile Nav */
.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.nav-mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.nav-mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 0.95rem;
    font-weight: 500;
    font-family: var(--font-body);
    border-radius: 2px;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(26, 54, 93, 0.2);
}

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

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

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

.btn-accent:hover {
    background: var(--color-accent-light);
    border-color: var(--color-accent-light);
}

/* ===== Section Styles ===== */
section {
    padding: 6rem 8%;
}

.section-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 1rem;
    display: block;
}

.section-title {
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 600px;
    font-weight: 300;
}

.section-header {
    margin-bottom: 4rem;
}

.section-header.center {
    text-align: center;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== Page Hero ===== */
.page-hero {
    padding: 10rem 8% 5rem;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-warm) 100%);
    position: relative;
    overflow: hidden;
}

.page-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: radial-gradient(ellipse, rgba(201, 169, 98, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.page-hero-content {
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.page-hero .breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

.page-hero .breadcrumb a {
    color: var(--color-text-light);
    transition: var(--transition);
}

.page-hero .breadcrumb a:hover {
    color: var(--color-primary);
}

.page-hero .breadcrumb span {
    color: var(--color-accent);
}

.page-hero h1 {
    margin-bottom: 1.5rem;
}

.page-hero p {
    font-size: 1.2rem;
    color: var(--color-text-light);
    max-width: 600px;
    font-weight: 300;
}

/* ===== Cards ===== */
.card {
    background: white;
    border-radius: 4px;
    padding: 2.5rem;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

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

.card-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    color: white;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

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

/* ===== Grid Layouts ===== */
.grid {
    display: grid;
    gap: 2rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ===== Service List ===== */
.service-list {
    margin-top: 1.5rem;
}

.service-list li {
    padding: 0.6rem 0;
    color: var(--color-text-light);
    font-size: 0.95rem;
    position: relative;
    padding-left: 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.service-list li:last-child {
    border-bottom: none;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 6px;
    height: 6px;
    background: var(--color-accent);
    border-radius: 50%;
    transform: translateY(-50%);
}

/* ===== CTA Section ===== */
.cta-section {
    background: var(--color-primary);
    color: white;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse at top right, rgba(201, 169, 98, 0.15) 0%, transparent 60%);
    pointer-events: none;
}

.cta-section .section-title {
    color: white;
}

.cta-section .section-desc {
    color: rgba(255, 255, 255, 0.8);
    margin: 0 auto 2rem;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

/* ===== FAQ ===== */
.faq-item {
    background: white;
    margin-bottom: 1rem;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    padding: 1.5rem 2rem;
    background: transparent;
    border: none;
    text-align: left;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--color-bg);
}

.faq-icon {
    width: 24px;
    height: 24px;
    position: relative;
    flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    background: var(--color-accent);
    transition: var(--transition);
}

.faq-icon::before {
    width: 12px;
    height: 2px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-icon::after {
    width: 2px;
    height: 12px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.faq-item.active .faq-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
    opacity: 0;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-answer-inner {
    padding: 0 2rem 1.5rem;
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

/* ===== Contact Form ===== */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
}

.form-group input,
.form-group textarea,
.form-group select {
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 2px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--color-bg);
}

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

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--color-primary);
    color: white;
    padding: 5rem 8% 2rem;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.footer-logo span {
    color: var(--color-accent);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-col h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    margin-bottom: 1.5rem;
    color: var(--color-accent-light);
}

.footer-col li {
    margin-bottom: 0.75rem;
}

.footer-col a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-col a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

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

/* Stagger children */
.stagger-children > * {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-children.visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-children.visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-children.visible > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-children.visible > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-children.visible > *:nth-child(6) { transition-delay: 0.6s; }

.stagger-children.visible > * {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Image Styles ===== */
.hero-bg-image {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0.65;
    pointer-events: none;
}

.about-image-container {
    position: relative;
    height: 450px;
    border-radius: 4px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: linear-gradient(to top, rgba(26, 54, 93, 0.9), transparent);
    color: white;
}

.about-image-overlay h4 {
    color: var(--color-accent-light);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.about-image-overlay p {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-style: italic;
    margin: 0;
}

.service-hero-image {
    height: 300px;
    border-radius: 4px;
    overflow: hidden;
    position: relative;
}

.service-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.service-hero-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26, 54, 93, 0.3), transparent);
}

.wechat-qr-image {
    width: 200px;
    height: 200px;
    border-radius: 4px;
    overflow: hidden;
    margin: 0 auto 1.5rem;
    background: white;
    padding: 10px;
    box-shadow: var(--shadow-sm);
}

.wechat-qr-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    
    .footer-main {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    section {
        padding: 4rem 6%;
    }
    
    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: white;
        flex-direction: column;
        padding: 6rem 2rem 2rem;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }
    
    .nav-links.active {
        right: 0;
    }
    
    .nav-links a {
        padding: 1rem 0;
        border-bottom: 1px solid var(--color-border);
        width: 100%;
    }
    
    .nav-dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding-left: 1rem;
        display: none;
    }
    
    .nav-dropdown.active .nav-dropdown-menu {
        display: block;
    }
    
    .nav-cta {
        margin-top: 1rem;
        width: 100%;
        text-align: center;
    }
    
    .nav-mobile-toggle {
        display: flex;
    }
    
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
}