:root {
    /* Chinese Imperial Color Palette */
    --imperial-red: #b91c1c;
    /* Primary Red */
    --dark-red: #7f1d1d;
    /* Deep Crimson */
    --gold-accent: #d97706;
    /* Imperial Gold */
    --gold-light: #f59e0b;
    /* Bright Gold */
    --porcelain-bg: rgba(249, 250, 240, 0.86);
    /* Clearer / Lighter Porcelain Overlay */
    --card-bg: rgba(255, 255, 255, 0.2);
    /* Highly Transparent Glass Card Background */
    --text-dark: #1c1917;
    --text-muted: #44403c;
    --border-gold: rgba(217, 119, 6, 0.35);
    --radius-md: 12px;
    --radius-lg: 16px;
    --header-height: 80px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Plus Jakarta Sans", sans-serif;
    color: var(--text-dark);
    background:
        linear-gradient(
            135deg,
            rgba(184, 89, 89, 0.4),
            rgba(209, 138, 138, 0.24)
        ),
        url("https://images.unsplash.com/photo-1504307651254-35680f356dfd?auto=format&fit=crop&w=1920&q=80")
            center/cover no-repeat fixed;
    min-block-size: 100vh;
    padding-block-start: calc(var(--header-height) + 16px);
    padding-block-end: 24px;
    padding-inline-start: 12px;
    padding-inline-end: 12px;
}

/* ------------------------------------
           RESPONSIVE STICKY HEADER
        ------------------------------------ */
.site-header {
    position: fixed;
    inset-block-start: 0;
    inset-inline-start: 0;
    inline-size: 100%;
    block-size: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 clamp(16px, 4vw, 60px);
    background: rgba(250, 246, 240, 0.37);
    /* Transparent Header */
    border-block-end: 2px solid var(--gold-accent);
    z-index: 1000;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
}

.contact-section {
    padding: clamp(40px, 6vw, 80px) clamp(20px, 5vw, 60px);
    border-block-start: 1px solid var(--border-gold);
    background: rgba(255, 255, 255, 0.4);
}

.contact-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
    max-inline-size: 1100px;
    margin: 0 auto;
    align-items: start;
}

/* Contact Info Card */
.contact-info {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-gold);
}

.contact-info h3 {
    font-size: 1.35rem;
    color: var(--dark-red);
    margin-block-end: 20px;
    line-height: 1.3;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.contact-info-item {
    font-size: 0.92rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.contact-info-item strong {
    color: var(--text-dark);
}

/* Contact Form Styling */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
    inline-size: 100%;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-gold);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    inline-size: 100%;
}

.form-group label {
    display: block;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    inline-size: 100%;
    box-sizing: border-box;
    display: block;
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid var(--border-gold);
    background: #ffffff;
    font-family: inherit;
    font-size: 0.92rem;
    color: var(--text-dark);
    outline: none;
    transition:
        border-color 0.2s,
        box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--imperial-red);
    box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.15);
}

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

.logo-img {
    block-size: clamp(38px, 5vw, 48px);
    inline-size: auto;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid var(--border-gold);
}

.brand-text h1 {
    font-family: "Playfair Display", serif;
    font-size: clamp(0.95rem, 2vw, 1.2rem);
    font-weight: 700;
    color: var(--dark-red);
    letter-spacing: 0.5px;
    line-height: 1.1;
}

.brand-text p {
    font-size: clamp(0.6rem, 1.2vw, 0.75rem);
    color: var(--gold-accent);
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.cn-title {
    font-family: "Noto Serif SC", serif;
    font-size: 0.85rem;
    color: var(--imperial-red);
    font-weight: 700;
    margin-inline-start: 4px;
}

/* DESKTOP NAV LINKS */
.nav-links {
    display: flex;
    gap: clamp(14px, 2vw, 32px);
    list-style: none;
    align-items: center;
    transition: all 0.3s ease;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-size: 0.9rem;
    font-weight: 600;
    transition: color 0.2s;
    white-space: nowrap;
}

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

/* MOBILE HAMBURGER BUTTON */
.hamburger-btn {
    display: none;
    background: rgba(250, 246, 240, 0.6);
    border: 1px solid var(--gold-accent);
    color: var(--dark-red);
    font-size: 1.6rem;
    inline-size: 42px;
    block-size: 42px;
    border-radius: 6px;
    cursor: pointer;
    justify-content: center;
    align-items: center;
    transition: all 0.2s ease;
}

.hamburger-btn:hover {
    background: rgba(217, 119, 6, 0.15);
    color: var(--imperial-red);
}

/* ------------------------------------
           PAGE WRAPPER (CLEARER & SMOOTH)
        ------------------------------------ */
.page-wrapper {
    max-inline-size: 1400px;
    margin: 0 auto;
    background: var(--porcelain-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-gold);
}

/* Typography */
h1,
h2,
h3,
.serif-title {
    font-family: "Playfair Display", serif;
    font-weight: 600;
    color: var(--text-dark);
}

.btn-primary {
    display: inline-block;
    background: linear-gradient(135deg, var(--imperial-red), var(--dark-red));
    color: #ffffff;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 1px solid var(--gold-accent);
    cursor: pointer;
    text-align: center;
    box-shadow: 0 4px 12px rgba(185, 28, 28, 0.25);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--dark-red), #500707);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(185, 28, 28, 0.4);
    border-color: var(--gold-light);
}

/* ------------------------------------
           1. HERO SECTION
        ------------------------------------ */
.hero-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    min-block-size: 540px;
}

.hero-left {
    padding: clamp(30px, 6vw, 70px) clamp(20px, 5vw, 60px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

.hero-logo-box {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-block-end: 24px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    border: 2px solid var(--gold-accent);
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(217, 119, 6, 0.15);
}

.hero-logo-img {
    block-size: 52px;
    inline-size: auto;
    object-fit: contain;
}

.hero-logo-text h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dark-red);
    line-height: 1.1;
}

.hero-logo-text span {
    font-family: "Noto Serif SC", serif;
    font-size: 0.75rem;
    color: var(--gold-accent);
    font-weight: 700;
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.4rem);
    line-height: 1.15;
    margin-block-end: 24px;
    color: var(--dark-red);
}

.hero-thumbs {
    display: flex;
    gap: 16px;
    margin-block-end: 28px;
    inline-size: 100%;
}

.hero-thumb-img {
    inline-size: clamp(100px, 20vw, 140px);
    block-size: clamp(120px, 22vw, 160px);
    object-fit: cover;
    border-radius: 8px;
    border: 2px solid var(--gold-accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.hero-subtext {
    font-size: clamp(0.85rem, 1.5vw, 0.95rem);
    color: var(--text-muted);
    max-inline-size: 420px;
    line-height: 1.6;
    margin-block-end: 28px;
}

.hero-right {
    position: relative;
    inline-size: 100%;
    min-block-size: 340px;
    border-inline-start: 2px solid var(--gold-accent);
}

.hero-main-img {
    inline-size: 100%;
    block-size: 100%;
    object-fit: cover;
}

/* ------------------------------------
           2. ABOUT SECTION
        ------------------------------------ */
.about-section {
    padding: clamp(40px, 6vw, 80px) clamp(20px, 5vw, 60px) 40px;
    text-align: center;
    max-inline-size: 850px;
    margin: 0 auto;
}

.about-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    color: var(--dark-red);
    margin-block-end: 8px;
}

.cn-subtitle {
    font-family: "Noto Serif SC", serif;
    color: var(--gold-accent);
    font-size: 1.1rem;
    font-weight: 700;
    margin-block-end: 16px;
    letter-spacing: 2px;
}

.about-subtitle {
    font-size: clamp(0.9rem, 1.5vw, 1rem);
    font-weight: 600;
    margin-block-end: 16px;
    color: var(--text-dark);
}

.about-description {
    font-size: clamp(0.85rem, 1.3vw, 0.92rem);
    color: var(--text-muted);
    line-height: 1.8;
    margin-block-end: 32px;
}

.about-banner {
    inline-size: 100%;
    block-size: clamp(240px, 40vw, 460px);
    object-fit: cover;
    margin-block-start: 20px;
    border-block-start: 2px solid var(--gold-accent);
    border-block-end: 2px solid var(--gold-accent);
}

/* ------------------------------------
           3. EXPERTISE, ASSETS & PROJECTS GRID
        ------------------------------------ */
.services-section,
.assets-section,
.projects-section {
    padding: clamp(40px, 6vw, 80px) clamp(20px, 5vw, 60px);
    border-block-start: 1px solid var(--border-gold);
}

.section-center-title {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.8rem);
    color: var(--dark-red);
    margin-block-end: clamp(10px, 2vw, 16px);
}

.section-subtitle-text {
    text-align: center;
    font-size: clamp(0.85rem, 1.3vw, 0.95rem);
    color: var(--text-muted);
    max-inline-size: 650px;
    margin: 0 auto clamp(30px, 5vw, 50px);
    line-height: 1.6;
}

/* 4-COLUMN RESPONSIVE GRID FOR ASSETS */
.interactive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: clamp(18px, 2.5vw, 28px);
}

/* MORE TRANSPARENT FROSTED GLASS CARDS */
.interactive-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border: 1px solid rgba(217, 119, 6, 0.4);
    cursor: pointer;
    transition: all 0.35s cubic-bezier(0.165, 0.84, 0.44, 1);
    display: flex;
    flex-direction: column;
}

.interactive-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 18px 36px rgba(185, 28, 28, 0.22);
    border-color: var(--imperial-red);
}

.card-img-container {
    inline-size: 100%;
    block-size: 200px;
    overflow: hidden;
    position: relative;
}

.card-img-container img {
    inline-size: 100%;
    block-size: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.interactive-card:hover .card-img-container img {
    transform: scale(1.08);
}

.card-badge {
    position: absolute;
    inset-block-start: 12px;
    inset-inline-start: 12px;
    background: linear-gradient(135deg, var(--imperial-red), var(--dark-red));
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 4px 10px;
    border-radius: 4px;
    letter-spacing: 0.5px;
    border: 1px solid var(--gold-light);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.card-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-block-end: 8px;
    color: var(--dark-red);
    transition: color 0.2s;
}

.interactive-card:hover .card-title {
    color: var(--imperial-red);
}

.card-desc {
    font-size: 0.84rem;
    color: var(--text-muted);
    line-height: 1.55;
    margin-block-end: 16px;
}

.card-action {
    margin-block-start: auto;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--gold-accent);
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ------------------------------------
           4. TESTIMONIALS SECTION
        ------------------------------------ */
.testimonials-section {
    border-block-start: 1px solid var(--border-gold);
    background: rgba(243, 237, 226, 0.3);
}

.testimonials-header {
    padding: clamp(24px, 4vw, 40px) clamp(20px, 5vw, 60px);
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    color: var(--dark-red);
    border-block-end: 1px solid var(--border-gold);
}

.testimonial-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    padding: clamp(20px, 4vw, 40px) clamp(20px, 5vw, 60px);
    border-block-end: 1px solid var(--border-gold);
    gap: 16px;
    align-items: center;
}

.testimonial-row:last-child {
    border-block-end: none;
}

.testimonial-author {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dark-red);
}

.testimonial-quote {
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
    font-style: italic;
}

/* ------------------------------------
           RESPONSIVE POPUP MODAL
        ------------------------------------ */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(20, 7, 7, 0.82);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 16px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    inline-size: 100%;
    max-inline-size: 700px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 2px solid var(--gold-accent);
    transform: scale(0.92);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    max-block-size: 85vh;
    display: flex;
    flex-direction: column;
}

.modal-backdrop.active .modal-card {
    transform: scale(1);
}

.modal-close-btn {
    position: absolute;
    inset-block-start: 12px;
    inset-inline-end: 12px;
    inline-size: 36px;
    block-size: 36px;
    border-radius: 50%;
    background: var(--imperial-red);
    color: white;
    border: 1px solid var(--gold-light);
    font-size: 1.3rem;
    cursor: pointer;
    z-index: 10;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background 0.2s;
}

.modal-close-btn:hover {
    background: var(--dark-red);
}

.modal-img {
    inline-size: 100%;
    block-size: clamp(180px, 35vh, 320px);
    object-fit: cover;
    flex-shrink: 0;
}

.modal-body {
    padding: clamp(20px, 4vw, 32px);
    overflow-y: auto;
}

.modal-category {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--gold-accent);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-block-end: 6px;
}

.modal-title {
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    color: var(--dark-red);
    margin-block-end: 12px;
}

.modal-details {
    font-size: clamp(0.85rem, 1.2vw, 0.95rem);
    color: var(--text-muted);
    line-height: 1.7;
    margin-block-end: 20px;
}

/* Fade effect for Card Images */
.card-carousel-img {
    transition: opacity 0.8s ease-in-out;
    opacity: 1;
}

.card-carousel-img.fade-out {
    opacity: 0;
}

/* Fade effect for Modal Carousel Image */
#carouselSlide {
    transition: opacity 0.8s ease-in-out;
    opacity: 1;
}

#carouselSlide.fade-out {
    opacity: 0;
}

/* ------------------------------------
           MOBILE BREAKPOINTS (HAMBURGER MENU)
        ------------------------------------ */
@media (max-width: 860px) {
    .hamburger-btn {
        display: flex;
    }

    .nav-links {
        position: absolute;
        inset-block-start: var(--header-height);
        inset-inline-start: 0;
        inline-size: 100%;
        background: rgba(250, 246, 240, 0.94);
        backdrop-filter: blur(16px);
        flex-direction: column;
        align-items: stretch;
        padding: 0;
        max-block-size: 0;
        overflow: hidden;
        border-block-end: 0px solid var(--gold-accent);
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
    }

    .nav-links.mobile-open {
        max-block-size: 380px;
        padding: 16px 0;
        border-block-end: 2px solid var(--gold-accent);
    }

    .nav-links li {
        inline-size: 100%;
        text-align: center;
    }

    .nav-links a {
        display: block;
        padding: 12px 20px;
        font-size: 1rem;
        border-block-end: 1px solid rgba(217, 119, 6, 0.1);
    }

    .nav-links li:last-child a {
        border-block-end: none;
    }

    .hero-section {
        grid-template-columns: 1fr;
    }

    .hero-right {
        block-size: 280px;
        border-inline-start: none;
        border-block-start: 2px solid var(--gold-accent);
    }
}