/* ========================================
   平会石材 - 主样式表
   ======================================== */

/* ===== CSS Variables ===== */
:root {
    --color-primary: #8B7355;
    --color-primary-dark: #6B5540;
    --color-primary-light: #C4A882;
    --color-accent: #D4A853;
    --color-bg: #FAF8F5;
    --color-bg-dark: #2C2416;
    --color-bg-card: #FFFFFF;
    --color-text: #2D2D2D;
    --color-text-light: #6B6B6B;
    --color-text-muted: #999999;
    --color-border: #E8E4DB;
    --color-border-light: #F0EDE6;
    --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    --font-body: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
    --nav-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { border: none; cursor: pointer; background: none; font-family: inherit; }
input, select, textarea { font-family: inherit; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

/* ===== Section Header ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--color-primary);
    background: rgba(139,115,85,0.08);
    padding: 6px 20px;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 36px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 50px;
    transition: var(--transition);
    letter-spacing: 0.5px;
    white-space: nowrap;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(139,115,85,0.35);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
    transform: translateY(-2px);
}

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(255,255,255,0);
    backdrop-filter: blur(0);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    transition: var(--transition);
}

.navbar.scrolled .nav-logo { color: var(--color-text); }

.logo-icon {
    color: var(--color-accent);
    font-size: 24px;
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav-link {
    font-size: 14px;
    font-weight: 500;
    color: rgba(255,255,255,0.85);
    position: relative;
    padding: 4px 0;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.navbar.scrolled .nav-link { color: var(--color-text-light); }

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

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

.nav-link:hover,
.nav-link.active { color: #fff; }

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active { color: var(--color-primary); }

.nav-phone {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    padding: 8px 18px;
    border: 1.5px solid rgba(255,255,255,0.3);
    border-radius: 50px;
    transition: var(--transition);
}

.navbar.scrolled .nav-phone {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.nav-phone:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}

.navbar.scrolled .nav-toggle span { background: var(--color-text); }

/* ========================================
   HERO
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a1a2e 0%, #2d2d3f 30%, #3d3a35 70%, #2c2416 100%);
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(212,168,83,0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(196,168,130,0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(139,115,85,0.1) 0%, transparent 50%);
}

/* Geometric stone-like pattern */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
        linear-gradient(-45deg, rgba(255,255,255,0.02) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, rgba(255,255,255,0.02) 75%),
        linear-gradient(-45deg, transparent 75%, rgba(255,255,255,0.02) 75%);
    background-size: 120px 120px;
    background-position: 0 0, 0 60px, 60px -60px, -60px 0px;
    opacity: 0.5;
}

.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: #fff;
    max-width: 800px;
}

.hero-subtitle {
    font-size: 14px;
    letter-spacing: 6px;
    color: var(--color-primary-light);
    margin-bottom: 24px;
    font-weight: 500;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(36px, 7vw, 68px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-accent {
    color: var(--color-accent);
    position: relative;
}

.hero-accent::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 0;
    width: 100%;
    height: 8px;
    background: var(--color-primary);
    opacity: 0.3;
    border-radius: 4px;
    z-index: -1;
}

.hero-desc {
    font-size: 16px;
    color: rgba(255,255,255,0.7);
    line-height: 2;
    margin-bottom: 40px;
}

.hero-badge {
    display: inline-block;
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--color-accent), #c99540);
    padding: 8px 28px;
    border-radius: 50px;
    margin-bottom: 20px;
    letter-spacing: 1px;
    box-shadow: 0 4px 20px rgba(212,168,83,0.4);
    animation: badgePulse 2s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 4px 20px rgba(212,168,83,0.4); }
    50% { box-shadow: 0 4px 30px rgba(212,168,83,0.7); }
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 40px;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--color-accent);
    letter-spacing: -1px;
}

.stat-label {
    font-size: 13px;
    color: rgba(255,255,255,0.6);
    letter-spacing: 1px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(255,255,255,0.15);
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.5);
    font-size: 12px;
    letter-spacing: 2px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

/* ===== Fade Up Animation ===== */
.fade-up {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 0.8s ease forwards;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }
.delay-3 { animation-delay: 0.6s; }
.delay-4 { animation-delay: 0.8s; }
.delay-5 { animation-delay: 1.0s; }

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

/* ========================================
   PRODUCTS
   ======================================== */
.products {
    background: var(--color-bg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.product-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--color-border-light);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.product-img {
    position: relative;
    height: 220px;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: transform 0.6s ease;
}

.product-card:hover .product-img {
    transform: scale(1.05);
}

.product-overlay {
    position: absolute;
    inset: 0;
    background: rgba(44,36,22,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
}

.product-card:hover .product-overlay { opacity: 1; }

.product-view {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    padding: 10px 28px;
    border: 2px solid rgba(255,255,255,0.7);
    border-radius: 50px;
    letter-spacing: 1px;
}

.product-info {
    padding: 24px 20px 28px;
}

.product-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--color-primary);
    background: rgba(139,115,85,0.08);
    padding: 3px 12px;
    border-radius: 20px;
    margin-bottom: 10px;
}

.product-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.product-desc {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 14px;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.product-features li {
    font-size: 12px;
    color: var(--color-text-muted);
    background: var(--color-border-light);
    padding: 3px 10px;
    border-radius: 4px;
}

/* ========================================
   SERVICES
   ======================================== */
.services {
    background: #fff;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 1px solid var(--color-border-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.service-card:hover::before { transform: scaleX(1); }

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.service-card-featured {
    grid-column: 1 / -1;
    max-width: 500px;
    justify-self: center;
    background: linear-gradient(135deg, #faf8f5 0%, #f5f0e8 100%);
    border: 2px solid var(--color-primary-light);
}

.service-icon {
    width: 56px;
    height: 56px;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-text);
}

.service-desc {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
}

.service-list li {
    font-size: 13px;
    color: var(--color-text-light);
    padding: 5px 0;
    padding-left: 16px;
    position: relative;
}

.service-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 13px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-primary-light);
}

/* ========================================
   GALLERY
   ======================================== */
.gallery {
    background: var(--color-bg);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 260px;
    gap: 12px;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.gallery-item.large {
    grid-column: span 2;
    grid-row: span 2;
}

.gallery-img {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: transform 0.4s ease;
}

.gallery-img:hover {
    transform: scale(1.03);
}

/* ========================================
   GALLERY LIGHTBOX
   ======================================== */
.gallery-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
}
.gallery-lightbox.active {
    display: flex;
}
.lightbox-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.88);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}
.lightbox-content {
    position: relative;
    z-index: 1;
    max-width: 90vw;
    max-height: 85vh;
    text-align: center;
    animation: lightboxIn 0.3s ease;
}
@keyframes lightboxIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}
.lightbox-image {
    max-width: 100%;
    max-height: 75vh;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    display: block;
    margin: 0 auto;
}
.lightbox-close {
    position: absolute;
    top: -44px;
    right: -4px;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}
.lightbox-close:hover {
    background: rgba(255,255,255,0.2);
}
.lightbox-caption {
    color: #fff;
    margin-top: 16px;
    font-size: 15px;
    opacity: 0.9;
}
.lightbox-caption h4 {
    font-size: 18px;
    margin-bottom: 4px;
}
.lightbox-caption p {
    font-size: 14px;
    opacity: 0.7;
}

.gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px 24px 20px;
    background: linear-gradient(transparent, rgba(0,0,0,0.75));
    color: #fff;
    transform: translateY(10px);
    opacity: 0;
    transition: var(--transition);
}

.gallery-img:hover .gallery-caption {
    transform: translateY(0);
    opacity: 1;
}

.gallery-caption h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.gallery-caption p {
    font-size: 13px;
    opacity: 0.8;
}

/* Gallery background - using real images via inline style */

/* ========================================
   ABOUT
   ======================================== */
.about {
    background: #fff;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-text {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.highlight-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.highlight-icon {
    width: 32px;
    height: 32px;
    min-width: 32px;
    background: rgba(139,115,85,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-weight: 700;
    font-size: 14px;
}

.highlight-item strong {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
}

.highlight-item div {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.5;
}

/* About Visual */
.about-visual {
    position: relative;
    height: 450px;
}

.about-image-main {
    width: 75%;
    height: 320px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.about-stone-block {
    width: 100%;
    height: 100%;
    position: relative;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.about-image-secondary {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 50%;
    height: 200px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    border: 6px solid #fff;
}

.about-stone-slab {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.about-badge {
    position: absolute;
    top: 20px;
    right: 30px;
    background: var(--color-primary);
    color: #fff;
    padding: 16px 24px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.badge-number {
    display: block;
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -1px;
}

.badge-text {
    font-size: 13px;
    letter-spacing: 1px;
    opacity: 0.9;
}

/* ========================================
   CONTACT
   ======================================== */
.contact {
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: 32px;
    align-items: start;
}

.contact-info-card,
.contact-form-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
}

.contact-info-card h3,
.contact-form-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--color-text);
}

.form-subtitle {
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 24px;
    margin-top: -16px;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-bottom: 32px;
}

.contact-info-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
}

.contact-icon-circle {
    width: 44px;
    height: 44px;
    min-width: 44px;
    background: rgba(139,115,85,0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
}

.contact-label {
    display: block;
    font-size: 12px;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.contact-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.5;
}

a.contact-value:hover {
    color: var(--color-primary);
}

.contact-qr {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--color-bg);
    border-radius: var(--radius-md);
}

.qr-placeholder svg {
    display: block;
}

.contact-qr p {
    font-size: 13px;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Form */
.contact-form { }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(139,115,85,0.1);
    background: #fff;
}

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

.btn-submit {
    width: 100%;
    padding: 16px;
    font-size: 16px;
    margin-top: 8px;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 70px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    margin-top: 12px;
}

.footer-col h4 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col li,
.footer-col a {
    font-size: 14px;
    color: rgba(255,255,255,0.55);
    transition: var(--transition);
}

.footer-col a:hover {
    color: var(--color-accent);
}

.footer-contact-list li,
.footer-contact-list a {
    color: rgba(255,255,255,0.55);
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.35);
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-3px);
}

/* ========================================
   MOBILE CALL BUTTON
   ======================================== */
.mobile-call-btn {
    display: none;
    position: fixed;
    bottom: 24px;
    left: 24px;
    width: 56px;
    height: 56px;
    background: #4CAF50;
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(76,175,80,0.4);
    align-items: center;
    justify-content: center;
    z-index: 999;
    animation: pulse-call 2s infinite;
}

@keyframes pulse-call {
    0% { box-shadow: 0 0 0 0 rgba(76,175,80,0.5); }
    70% { box-shadow: 0 0 0 16px rgba(76,175,80,0); }
    100% { box-shadow: 0 0 0 0 rgba(76,175,80,0); }
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-visual {
        height: 350px;
        order: -1;
    }

    .about-image-main {
        width: 100%;
        height: 280px;
    }

    .about-image-secondary {
        width: 60%;
        height: 160px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 60px;
    }

    .section {
        padding: 64px 0;
    }

    /* Nav */
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 24px;
        box-shadow: var(--shadow-xl);
        transition: right 0.35s ease;
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu .nav-link {
        color: var(--color-text);
        font-size: 16px;
    }

    .nav-phone { display: none; }

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    /* Hero */
    .hero-stats {
        gap: 24px;
    }
    .stat-number { font-size: 26px; }
    .stat-label { font-size: 11px; }

    .hero-title {
        font-size: clamp(28px, 8vw, 48px);
    }

    .hero-desc {
        font-size: 14px;
        line-height: 1.8;
    }

    .hero-buttons { margin-bottom: 40px; }

    /* Products */
    .products-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .product-info { padding: 16px 12px 20px; }
    .product-title { font-size: 17px; }
    .product-img { height: 160px; }

    /* Services */
    .services-grid {
        grid-template-columns: 1fr;
    }

    .service-card-featured {
        max-width: 100%;
    }

    /* Gallery */
    .gallery-grid {
        grid-template-columns: 1fr 1fr;
        grid-auto-rows: 200px;
        gap: 8px;
        padding: 0 16px;
    }

    .gallery-item.large {
        grid-column: span 2;
        grid-row: span 2;
    }

    /* Contact */
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .footer-col h4 { margin-bottom: 12px; }

    /* Back to top */
    .back-to-top {
        bottom: 24px;
        right: 16px;
        width: 40px;
        height: 40px;
    }

    /* Mobile call */
    .mobile-call-btn {
        display: flex;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .section-title {
        font-size: 24px;
    }

    .hero-stats {
        gap: 16px;
    }
    .stat-divider { height: 30px; }
    .stat-number { font-size: 22px; }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .products-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .product-img { height: 200px; }

    .about-highlights {
        grid-template-columns: 1fr;
    }

    .about-badge {
        top: 10px;
        right: 10px;
        padding: 12px 18px;
    }
    .badge-number { font-size: 22px; }

    .contact-info-card,
    .contact-form-card {
        padding: 24px 20px;
    }

    .gallery-grid {
        grid-template-columns: 1fr;
        grid-auto-rows: 220px;
    }

    .gallery-item.large {
        grid-column: span 1;
        grid-row: span 2;
    }
}

/* ========================================
   COLOR FILTER (NEW)
   ======================================== */
.color-filter {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}
.filter-label { font-size: 14px; color: var(--color-text-light); font-weight: 500; }
.filter-btn {
    padding: 8px 20px;
    border: 1.5px solid var(--color-border);
    border-radius: 50px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-light);
    background: #fff;
    cursor: pointer;
    transition: var(--transition);
}
.filter-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

/* Product card enhancements */
.product-card.hidden { display: none; }
.product-badge {
    position: absolute; top: 12px; right: 12px;
    background: linear-gradient(135deg, #e85d5d, #c0392b);
    color: #fff; font-size: 11px; font-weight: 700; padding: 4px 12px;
    border-radius: 20px; z-index: 2; letter-spacing: 1px;
}
.product-specs {
    display: flex; gap: 12px; margin: 0 0 10px; flex-wrap: wrap;
}
.product-specs span {
    font-size: 11px; color: var(--color-text-muted);
    background: var(--color-border-light); padding: 2px 10px; border-radius: 4px;
}
.product-varieties {
    display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px;
}
.product-varieties span {
    font-size: 11px; color: var(--color-primary); background: rgba(139,115,85,0.06);
    padding: 3px 10px; border-radius: 4px; border: 1px solid rgba(139,115,85,0.12);
}

/* ========================================
   FEATURED STONES (NEW)
   ======================================== */
.featured { background: #fff; }
.featured-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.featured-card {
    background: var(--color-bg); border-radius: var(--radius-lg); overflow: hidden;
    border: 1px solid var(--color-border-light); transition: var(--transition);
}
.featured-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.featured-stone {
    height: 180px; position: relative; overflow: hidden;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
.featured-info { padding: 20px; }
.featured-info h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; color: var(--color-text); }
.featured-origin { font-size: 12px; color: var(--color-primary); display: block; margin-bottom: 10px; }
.featured-info p { font-size: 13px; color: var(--color-text-light); line-height: 1.7; margin-bottom: 12px; }
.featured-tags { display: flex; gap: 6px; flex-wrap: wrap; }
.featured-tags span { font-size: 11px; background: rgba(139,115,85,0.08); color: var(--color-primary); padding: 3px 10px; border-radius: 4px; }

/* ========================================
   CRAFT (NEW)
   ======================================== */
.craft { background: var(--color-bg); }
.craft-tabs {
    display: flex; justify-content: center; gap: 8px; margin-bottom: 40px;
}
.craft-tab {
    padding: 10px 28px; border: 1.5px solid var(--color-border); border-radius: 50px;
    font-size: 14px; font-weight: 500; color: var(--color-text-light); cursor: pointer;
    transition: var(--transition); background: #fff;
}
.craft-tab:hover { border-color: var(--color-primary); color: var(--color-primary); }
.craft-tab.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.craft-panel { display: none; }
.craft-panel.active { display: block; }
.craft-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.craft-item {
    background: #fff; border-radius: var(--radius-md); padding: 24px; text-align: center;
    border: 1px solid var(--color-border-light); transition: var(--transition);
}
.craft-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.craft-visual {
    width: 100%; height: 100px; border-radius: var(--radius-sm); margin-bottom: 16px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}
.craft-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; color: var(--color-text); }
.craft-item p { font-size: 12px; color: var(--color-text-light); line-height: 1.6; }

/* ========================================
   PROCESS (NEW)
   ======================================== */
.process { background: #fff; }
.process-steps {
    display: flex; align-items: flex-start; justify-content: center; gap: 0; flex-wrap: wrap;
}
.process-step {
    text-align: center; width: 130px; flex-shrink: 0;
}
.step-number { font-size: 42px; font-weight: 800; color: rgba(139,115,85,0.1); line-height: 1; margin-bottom: 4px; }
.step-icon {
    width: 52px; height: 52px; margin: 0 auto 12px; color: var(--color-primary);
    background: rgba(139,115,85,0.06); border-radius: 50%; display: flex; align-items: center; justify-content: center;
}
.step-icon svg { width: 28px; height: 28px; }
.process-step h4 { font-size: 14px; font-weight: 700; margin-bottom: 6px; color: var(--color-text); }
.process-step p { font-size: 11px; color: var(--color-text-light); line-height: 1.6; }
.process-arrow {
    display: flex; align-items: center; padding-top: 50px; color: var(--color-primary-light);
    flex-shrink: 0; width: 40px; justify-content: center;
}
.process-arrow svg { width: 20px; height: 20px; }

/* ========================================
   GUIDE / STONE ENCYCLOPEDIA (NEW)
   ======================================== */
.guide { background: var(--color-bg); }
.guide-grid {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px;
}
.guide-card {
    background: #fff; border-radius: var(--radius-lg); padding: 28px;
    border: 1px solid var(--color-border-light); transition: var(--transition);
}
.guide-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.guide-card-header {
    display: flex; align-items: center; gap: 10px; margin-bottom: 16px; color: var(--color-primary);
}
.guide-card-header h3 { font-size: 17px; font-weight: 700; color: var(--color-text); }
.guide-list { display: flex; flex-direction: column; gap: 8px; }
.guide-list li { font-size: 13px; color: var(--color-text-light); line-height: 1.7; padding-left: 4px; }
.guide-list li strong { color: var(--color-primary); }
.compare-table-wrapper { overflow-x: auto; }
.compare-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.compare-table th, .compare-table td { padding: 10px 8px; text-align: center; border-bottom: 1px solid var(--color-border-light); }
.compare-table th { background: rgba(139,115,85,0.06); font-weight: 700; color: var(--color-primary); font-size: 12px; }
.compare-table td { color: var(--color-text-light); }
.compare-table tr:hover td { background: rgba(139,115,85,0.02); }

/* ========================================
   FAQ (NEW)
   ======================================== */
.faq { background: #fff; }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { background: var(--color-bg); border-radius: var(--radius-md); border: 1px solid var(--color-border-light); overflow: hidden; }
.faq-question {
    width: 100%; display: flex; align-items: center; justify-content: space-between;
    padding: 18px 24px; font-size: 15px; font-weight: 600; color: var(--color-text);
    cursor: pointer; transition: var(--transition); text-align: left;
}
.faq-question:hover { color: var(--color-primary); }
.faq-question svg { width: 20px; height: 20px; transition: transform 0.3s ease; flex-shrink: 0; margin-left: 16px; color: var(--color-text-muted); }
.faq-item.open .faq-question svg { transform: rotate(180deg); color: var(--color-primary); }
.faq-item.open .faq-question { color: var(--color-primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.4s ease; }
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer p { padding: 0 24px 18px; font-size: 14px; color: var(--color-text-light); line-height: 1.8; }

/* ========================================
   CONTACT MAP (NEW)
   ======================================== */
.contact-map { margin-top: 40px; }
.map-placeholder {
    background: var(--color-bg-dark); border-radius: var(--radius-lg); overflow: hidden; height: 280px;
    display: flex; align-items: center; justify-content: center;
    position: relative;
}
.map-placeholder::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(44,36,22,0.92) 0%, rgba(44,36,22,0.85) 100%),
                repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(255,255,255,0.02) 40px, rgba(255,255,255,0.02) 42px),
                repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(255,255,255,0.02) 40px, rgba(255,255,255,0.02) 42px);
}
.map-inner { position: relative; z-index: 1; text-align: center; color: #fff; }
.map-inner svg { color: var(--color-accent); margin-bottom: 12px; }
.map-inner h4 { font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.map-inner p { font-size: 14px; color: rgba(255,255,255,0.7); margin-bottom: 16px; }
.map-link {
    display: inline-block; padding: 10px 24px; background: var(--color-primary); color: #fff;
    border-radius: 50px; font-size: 14px; font-weight: 600; transition: var(--transition);
}
.map-link:hover { background: var(--color-primary-dark); transform: translateY(-2px); }

/* ========================================
   RESPONSIVE ADDITIONS
   ======================================== */
@media (max-width: 1024px) {
    .featured-grid { grid-template-columns: repeat(2, 1fr); }
    .process-steps { gap: 16px; }
    .process-arrow { display: none; }
    .process-step { width: 140px; }
    .craft-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .color-filter { gap: 6px; }
    .filter-btn { padding: 6px 14px; font-size: 12px; }
    .featured-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .featured-stone { height: 140px; }
    .guide-grid { grid-template-columns: 1fr; }
    .craft-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
    .craft-tab { padding: 8px 18px; font-size: 13px; }
    .process-steps { justify-content: center; gap: 20px; }
    .process-step { width: 120px; }
    .faq-question { padding: 14px 18px; font-size: 14px; }
    .map-placeholder { height: 220px; }
}

@media (max-width: 480px) {
    .featured-grid { grid-template-columns: 1fr; }
    .craft-grid { grid-template-columns: 1fr; }
    .process-step { width: 100px; }
    .step-number { font-size: 30px; }
    .step-icon { width: 40px; height: 40px; }
    .step-icon svg { width: 22px; height: 22px; }
    .guide-card { padding: 20px 16px; }
    .compare-table th, .compare-table td { padding: 6px 4px; font-size: 10px; }
}