/* === Variables === */
:root {
    --bg-primary: #F7F4EF;
    --text-primary: #2C2419;
    --accent-gold: #8B6914;
    --wood-tone: #6B4423;
    --hover-beige: #D4C4A8;
    --border-light: #E8E0D4;
    --white: #FFFFFF;
    --font-serif: 'Noto Serif SC', 'Songti SC', serif;
    --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-accent: 'ZCOOL XiaoWei', 'KaiTi', cursive;
    --content-max: 960px;
    --header-height: 72px;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.8;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--text-primary); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: var(--accent-gold); }

/* === Header === */
.site-header {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--header-height);
    z-index: 1000;
    transition: background-color 0.4s ease, box-shadow 0.4s ease;
    background-color: transparent;
}
.site-header.scrolled {
    background-color: rgba(247, 244, 239, 0.96);
    box-shadow: 0 2px 12px rgba(44, 36, 25, 0.06);
}
.header-inner {
    max-width: var(--content-max);
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}
.logo { display: flex; flex-direction: column; }
.logo-main {
    font-family: var(--font-accent);
    font-size: 28px;
    color: var(--text-primary);
    line-height: 1.2;
}
.logo-tag {
    font-family: var(--font-serif);
    font-size: 11px;
    color: var(--accent-gold);
    letter-spacing: 2px;
    margin-top: 2px;
}
.main-nav { display: flex; gap: 32px; align-items: center; }
.main-nav a {
    font-family: var(--font-serif);
    font-size: 15px;
    font-weight: 500;
    letter-spacing: 1px;
    position: relative;
    padding-bottom: 4px;
}
.main-nav a::after {
    content: ''; position: absolute; bottom: 0; left: 0;
    width: 0; height: 1px; background-color: var(--accent-gold);
    transition: width 0.3s ease;
}
.main-nav a:hover::after, .main-nav a.active::after { width: 100%; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; }
.nav-toggle span { display: block; width: 24px; height: 2px; background-color: var(--text-primary); transition: 0.3s; }

/* === Main & Footer === */
main { padding-top: var(--header-height); min-height: calc(100vh - 200px); }
.site-footer {
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: 48px 24px;
    margin-top: 80px;
}
.footer-inner {
    max-width: var(--content-max);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 24px;
}
.footer-brand strong {
    font-family: var(--font-accent);
    font-size: 22px;
    display: block;
    margin-bottom: 4px;
}
.footer-brand p, .footer-contact p {
    font-size: 13px;
    opacity: 0.8;
    line-height: 1.8;
}
.footer-copy { width: 100%; text-align: center; margin-top: 24px; padding-top: 24px; border-top: 1px solid rgba(247,244,239,0.1); font-size: 12px; opacity: 0.6; }

/* === Utility === */
.section { padding: 80px 24px; }
.section-inner { max-width: var(--content-max); margin: 0 auto; }
.section-title {
    font-family: var(--font-serif);
    font-size: 28px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 48px;
    letter-spacing: 4px;
}
.section-title::after {
    content: ''; display: block; width: 40px; height: 2px; background-color: var(--accent-gold); margin: 16px auto 0;
}

/* === Hero === */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.hero-bg {
    position: absolute; inset: 0;
    background-size: cover; background-position: center;
    filter: brightness(0.85) saturate(0.9);
    z-index: 0;
    transform: scale(1.08);
    animation: kenBurns 20s ease-out forwards;
}

@keyframes kenBurns {
    0% { transform: scale(1.08); }
    100% { transform: scale(1.0); }
}
.hero-content {
    position: relative; z-index: 1;
    text-align: center; color: var(--white);
    padding: 0 24px;
}
.hero-title {
    font-family: var(--font-accent);
    font-size: 72px;
    font-weight: 400;
    letter-spacing: 12px;
    margin-bottom: 16px;
    text-shadow: 0 4px 20px rgba(0,0,0,0.3);
}
.hero-subtitle {
    font-family: var(--font-serif);
    font-size: 20px;
    letter-spacing: 6px;
    opacity: 0.95;
    margin-bottom: 40px;
}
.hero-scroll {
    display: inline-block;
    font-family: var(--font-serif);
    font-size: 14px;
    letter-spacing: 2px;
    color: var(--white);
    border-bottom: 1px solid rgba(255,255,255,0.5);
    padding-bottom: 4px;
    transition: border-color 0.3s;
}
.hero-scroll:hover { border-color: var(--white); color: var(--white); }

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 80px;
    background: rgba(255,255,255,0.2);
    overflow: hidden;
    z-index: 2;
    opacity: 0;
    animation: fadeInIndicator 2s ease 1.5s forwards;
}
.scroll-indicator::before {
    content: "";
    display: block;
    width: 100%;
    height: 30px;
    position: absolute;
    top: 0;
    left: 0;
    background: var(--accent-gold);
    animation: lineAnim 2.6s infinite cubic-bezier(0.24, 0.5, 0.49, 0.94);
}

@keyframes fadeInIndicator {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

@keyframes lineAnim {
    0% { transform: translateY(-100%) scaleY(1); }
    50% { transform: translateY(80%) scaleY(2); }
    100% { transform: translateY(300%) scaleY(1); }
}

/* Scroll Reveal Animations */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 1.2s cubic-bezier(0.24, 0.5, 0.49, 0.94),
                transform 1.4s cubic-bezier(0.24, 0.5, 0.49, 0.94);
    will-change: opacity, transform;
}
.reveal.is-anim {
    opacity: 1;
    transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

.reveal-img {
    overflow: hidden;
}
.reveal-img img {
    will-change: transform;
    transform: scale(1.04);
    transition: transform 1.2s cubic-bezier(0.24, 0.5, 0.49, 0.94);
}
.reveal-img.is-anim img {
    transform: scale(1);
}

/* Section title reveal */
.section-title.reveal {
    transform: translateY(16px);
}
.section-title.reveal.is-anim {
    transform: translateY(0);
}

/* === Brand Teaser === */
.brand-teaser-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}
.brand-teaser-text p {
    margin-bottom: 20px;
    font-size: 15px;
    line-height: 2;
    color: var(--text-primary);
    opacity: 0.85;
}
.btn-outline {
    display: inline-block;
    padding: 12px 32px;
    border: 1px solid var(--accent-gold);
    color: var(--accent-gold);
    font-family: var(--font-serif);
    font-size: 14px;
    letter-spacing: 2px;
    transition: all 0.3s ease;
    margin-top: 16px;
}
.btn-outline:hover {
    background-color: var(--accent-gold);
    color: var(--white);
}

/* === Image Placeholder === */
.image-placeholder {
    background-color: var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    opacity: 0.4;
    font-family: var(--font-serif);
    font-size: 14px;
    letter-spacing: 2px;
    border: 1px solid var(--hover-beige);
}

/* === Featured Products === */
.featured { background-color: var(--white); }
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}
.product-card {
    cursor: pointer;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 32px rgba(44, 36, 25, 0.08);
}
.product-card:hover .product-image {
    border-color: var(--accent-gold);
}
.product-image {
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: border-color 0.3s;
    margin-bottom: 16px;
}
.product-card h3, .product-card h4 {
    font-family: var(--font-serif);
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.5;
}
.product-card p {
    font-size: 13px;
    color: var(--text-primary);
    opacity: 0.7;
    line-height: 1.6;
}
.section-cta { text-align: center; margin-top: 48px; }

/* === QR Section === */
.qr-section { background-color: var(--bg-primary); }
.qr-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 720px;
    margin: 0 auto;
}
.qr-card {
    background-color: var(--white);
    padding: 40px 32px;
    text-align: center;
    border: 1px solid var(--border-light);
    transition: box-shadow 0.3s ease;
}
.qr-card:hover {
    box-shadow: 0 8px 24px rgba(44, 36, 25, 0.06);
}
.qr-image {
    width: 160px;
    height: 160px;
    margin: 0 auto 24px;
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}
.qr-image img { width: 100%; height: 100%; object-fit: contain; }
.qr-card h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    margin-bottom: 8px;
}
.qr-card p {
    font-size: 13px;
    opacity: 0.7;
    line-height: 1.6;
}

/* === About Page === */
.about-company { background-color: var(--white); }
.about-history { background-color: var(--bg-primary); }
.about-content {
    max-width: 720px;
    margin: 0 auto;
}
.about-content p {
    font-size: 15px;
    line-height: 2.2;
    margin-bottom: 24px;
    text-align: justify;
}
.principles {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
    padding-top: 48px;
    border-top: 1px solid var(--border-light);
}
.principle-item {
    text-align: center;
}
.principle-char {
    display: block;
    font-family: var(--font-accent);
    font-size: 36px;
    color: var(--accent-gold);
    margin-bottom: 8px;
}
.principle-desc {
    font-size: 13px;
    opacity: 0.75;
    line-height: 1.6;
}

/* === Products Page === */
.products-page { background-color: var(--white); }
.category { margin-bottom: 64px; }
.category-title {
    font-family: var(--font-serif);
    font-size: 20px;
    font-weight: 600;
    color: var(--accent-gold);
    margin-bottom: 24px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-light);
    letter-spacing: 2px;
}
.product-spec {
    display: block;
    font-size: 12px;
    color: var(--text-primary);
    opacity: 0.5;
    margin-top: 8px;
    font-family: var(--font-sans);
}

/* === Stats Page === */
.stats-page { background-color: var(--white); min-height: calc(100vh - 200px); }
.summary-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}
.summary-card {
    background-color: var(--bg-primary);
    padding: 32px;
    text-align: center;
    border: 1px solid var(--border-light);
}
.summary-label {
    display: block;
    font-size: 13px;
    opacity: 0.7;
    margin-bottom: 8px;
    letter-spacing: 1px;
}
.summary-value {
    display: block;
    font-family: var(--font-serif);
    font-size: 36px;
    color: var(--accent-gold);
    font-weight: 600;
}
.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-bottom: 48px;
}
.chart-container {
    background-color: var(--bg-primary);
    padding: 24px;
    border: 1px solid var(--border-light);
}
.chart-container h3 {
    font-family: var(--font-serif);
    font-size: 16px;
    margin-bottom: 16px;
    text-align: center;
}
.chart-container canvas {
    max-height: 280px;
}
.recent-visits h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    margin-bottom: 16px;
}
.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--border-light);
}
#visitsTable {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
#visitsTable th {
    background-color: var(--bg-primary);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    border-bottom: 1px solid var(--border-light);
    white-space: nowrap;
}
#visitsTable td {
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-light);
    opacity: 0.85;
}
#visitsTable tr:last-child td { border-bottom: none; }
#visitsTable tbody tr:hover { background-color: var(--bg-primary); }

/* === Contact Page === */
.contact-page { background-color: var(--white); min-height: calc(100vh - 200px); }
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}
.contact-info h3 {
    font-family: var(--font-serif);
    font-size: 18px;
    margin-bottom: 12px;
    color: var(--accent-gold);
}
.contact-info p {
    font-size: 15px;
    opacity: 0.8;
    margin-bottom: 16px;
}
.map-placeholder {
    background-color: var(--bg-primary);
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    opacity: 0.3;
    font-family: var(--font-serif);
    font-size: 14px;
    border: 1px solid var(--border-light);
}
.contact-phone {
    text-align: center;
    padding-top: 48px;
    border-top: 1px solid var(--border-light);
}
.contact-phone p {
    font-size: 15px;
    opacity: 0.7;
    margin-bottom: 12px;
}
.contact-phone a {
    font-family: var(--font-serif);
    font-size: 24px;
    color: var(--accent-gold);
    letter-spacing: 2px;
}
.contact-phone a:hover { color: var(--wood-tone); }

/* === 404 Page === */
.not-found {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}
.not-found-content h1 {
    font-family: var(--font-accent);
    font-size: 120px;
    color: var(--accent-gold);
    opacity: 0.3;
    line-height: 1;
    margin-bottom: 16px;
}
.not-found-content p {
    font-family: var(--font-serif);
    font-size: 24px;
    margin-bottom: 8px;
}
.not-found-content span {
    display: block;
    font-size: 14px;
    opacity: 0.6;
    margin-bottom: 32px;
}

/* === Responsive === */
@media (max-width: 768px) {
    .main-nav {
        position: fixed; top: var(--header-height); left: 0; right: 0;
        background-color: rgba(247, 244, 239, 0.98);
        flex-direction: column; padding: 24px; gap: 20px;
        transform: translateY(-150%); transition: transform 0.4s ease;
        box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    }
    .site-header.nav-open .main-nav { transform: translateY(0); }
    .nav-toggle { display: flex; }
    .footer-inner { flex-direction: column; text-align: center; align-items: center; }
    .section { padding: 48px 16px; }
    .section-title { font-size: 22px; }
    .hero-title { font-size: 42px; letter-spacing: 6px; }
    .hero-subtitle { font-size: 16px; }
    .brand-teaser-grid { grid-template-columns: 1fr; gap: 32px; }
    .product-grid { grid-template-columns: 1fr; gap: 24px; }
    .qr-grid { grid-template-columns: 1fr; gap: 24px; }
    .principles { grid-template-columns: repeat(2, 1fr); }
    .about-content p { text-align: left; }
    .contact-grid { grid-template-columns: 1fr; gap: 32px; }
    .summary-cards { grid-template-columns: 1fr; }
    .charts-grid { grid-template-columns: 1fr; }
}