/* ========================================
   YIQIYUN 3D ToB Theme - Main Styles
   Refined professional ToB design system
   ======================================== */

/* CSS Variables — Design Tokens */
:root {
    --color-primary: #334155;
    --color-primary-dark: #0f172a;
    --color-primary-light: #e2e8f0;
    --color-primary-50: #f8fafc;
    --color-secondary: #475569;
    --color-accent: #64748b;
    --color-dark: #0f172a;
    --color-heading: #111827;
    --color-body: #4b5563;
    --color-muted: #6b7280;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-bg: #ffffff;
    --color-bg-light: #f8fafc;
    --color-bg-soft: #f1f5f9;
    --color-bg-tinted: #f8fafc;

    --font-base: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-heading: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;

    --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
    --shadow-md: 0 2px 4px 0 rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 4px 8px 0 rgba(15, 23, 42, 0.05);
    --shadow-xl: 0 8px 16px 0 rgba(15, 23, 42, 0.06);
    --shadow-2xl: 0 16px 32px 0 rgba(15, 23, 42, 0.08);
    --shadow-primary: none;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    --container-width: 1200px;
    --header-height: 88px;

    --gradient-primary: none;
    --gradient-primary-dark: none;
    --gradient-hero: linear-gradient(120deg, rgba(15, 23, 42, 0.82) 0%, rgba(15, 23, 42, 0.45) 55%, rgba(15, 23, 42, 0.18) 100%);
    --gradient-stat: none;
    --gradient-cta: none;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-body);
    background-color: var(--color-bg-light);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0 0 0.6em;
    color: var(--color-heading);
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 4vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }

p {
    margin: 0 0 1em;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--color-primary-dark);
}

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

ul, ol {
    margin: 0 0 1em;
    padding-left: 1.5em;
}

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

::selection {
    background: var(--color-primary);
    color: #fff;
}

/* Layout */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section-padding {
    padding-top: 80px;
    padding-bottom: 80px;
}

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

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

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

/* Scroll Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: box-shadow 0.3s ease, border-color 0.3s ease, background 0.3s ease;
}

.site-header-scrolled {
    box-shadow: var(--shadow-sm);
    border-bottom-color: var(--color-border);
    background: rgba(255, 255, 255, 0.95);
}

.site-header-spacer {
    height: var(--header-height);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    gap: 24px;
}

.site-branding {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.site-branding .site-logo {
    height: 76px;
    width: auto;
    max-width: none;
}

.site-title {
    display: none;
}

.main-navigation .nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-navigation .nav-menu a {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-heading);
    padding: 8px 0;
    position: relative;
    transition: color 0.2s ease;
}

.main-navigation .nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    border-radius: 2px;
    transition: width 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.main-navigation .nav-menu a:hover {
    color: var(--color-primary);
}

.main-navigation .nav-menu a:hover::after,
.main-navigation .nav-menu .current-menu-item > a::after {
    width: 100%;
}

.main-navigation .nav-menu .current-menu-item > a {
    color: var(--color-primary);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 0;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-heading);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: #fff;
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background: var(--color-primary-50);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

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

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.btn-lg {
    padding: 15px 32px;
    font-size: 16px;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 14px;
}

.btn-block {
    width: 100%;
}

/* Hero */
.hero-section {
    position: relative;
    min-height: 680px;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 720px;
    color: #fff;
    padding-top: 80px;
    padding-bottom: 80px;
}

.hero-title {
    font-size: clamp(2rem, 4.5vw, 3.25rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 24px;
    line-height: 1.15;
    letter-spacing: -0.03em;
}

.hero-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.25rem);
    color: rgba(255, 255, 255, 0.82);
    margin-bottom: 40px;
    line-height: 1.7;
    font-weight: 400;
    max-width: 600px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-actions .btn-primary {
    background: #fff;
    color: var(--color-dark);
}

.hero-actions .btn-primary:hover {
    background: var(--color-primary-light);
    color: var(--color-dark);
}

.hero-actions .btn-outline {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.55);
    background: transparent;
}

.hero-actions .btn-outline:hover {
    background: #fff;
    color: var(--color-dark);
    border-color: #fff;
    transform: translateY(-1px);
}

/* Stats */
.stats-section {
    background: var(--color-bg);
    padding: 56px 0;
    border-bottom: 1px solid var(--color-border);
    position: relative;
    z-index: 2;
    margin-top: -1px;
}

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

.stat-item {
    padding: 16px 20px;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    bottom: 20%;
    width: 1px;
    background: var(--color-border);
}

.stat-number {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--color-heading);
    line-height: 1.1;
    margin-bottom: 6px;
    font-family: var(--font-heading);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 14px;
    color: var(--color-muted);
    font-weight: 500;
}

/* Section headers */
.section-header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-primary);
    margin-bottom: 14px;
}

.section-tag::before {
    content: '';
    display: inline-block;
    width: 18px;
    height: 1.5px;
    background: var(--color-primary);
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    margin-bottom: 16px;
    font-weight: 800;
}

.section-desc {
    font-size: 17px;
    color: var(--color-muted);
    line-height: 1.7;
}

/* Product categories */
.products-section {
    padding: 96px 0;
}

.product-categories {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.category-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xs);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
}

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

.category-image {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    position: relative;
}

.category-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.category-card:hover .category-image img {
    transform: scale(1.04);
}

.category-body {
    padding: 26px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.category-body h3 {
    font-size: 20px;
    margin-bottom: 10px;
    font-weight: 700;
}

.category-body p {
    color: var(--color-muted);
    margin-bottom: 20px;
    font-size: 14px;
    line-height: 1.6;
    flex: 1;
}

.link-arrow {
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap 0.2s ease, color 0.2s ease;
}

.link-arrow:hover {
    color: var(--color-primary-dark);
    gap: 8px;
}

/* Industries */
.industries-section {
    padding: 96px 0;
    background: var(--color-bg);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.industry-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4 / 3;
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.industry-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.industry-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.industry-card:hover img {
    transform: scale(1.04);
}

.industry-content {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 28px;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.25) 65%, transparent 100%);
    color: #fff;
}

.industry-content h3 {
    color: #fff;
    font-size: 22px;
    margin-bottom: 8px;
    font-weight: 700;
}

.industry-content p {
    color: rgba(255, 255, 255, 0.82);
    margin: 0;
    font-size: 14px;
    line-height: 1.6;
}

/* Why us */
.why-us-section {
    padding: 96px 0;
}

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

.feature-item {
    background: var(--color-bg);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: transform 0.25s ease, border-color 0.25s ease;
    position: relative;
}

.feature-item:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary-light);
}

.feature-icon-wrap {
    width: 52px;
    height: 52px;
    margin: 0 auto 16px;
    border-radius: var(--radius-md);
    background: var(--color-primary-50);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.25s ease;
}

.feature-item:hover .feature-icon-wrap {
    background: var(--color-primary-light);
}

.feature-icon-wrap svg {
    width: 26px;
    height: 26px;
    color: var(--color-primary);
    stroke: var(--color-primary);
    fill: none;
}

.feature-item h3 {
    font-size: 17px;
    margin-bottom: 10px;
    font-weight: 700;
}

.feature-item p {
    font-size: 14px;
    color: var(--color-muted);
    margin: 0;
    line-height: 1.6;
}

/* About */
.about-section {
    padding: 96px 0;
    background: var(--color-bg);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-image {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    position: relative;
}

.about-image img {
    width: 100%;
    height: auto;
}

.about-content .section-tag {
    margin-bottom: 20px;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.about-content p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.8;
}

.about-list {
    list-style: none;
    padding: 0;
    margin: 24px 0 32px;
}

.about-list li {
    position: relative;
    padding-left: 32px;
    margin-bottom: 14px;
    color: var(--color-body);
    font-size: 15px;
    line-height: 1.6;
}

.about-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 2px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--color-primary-50);
    border: 2px solid var(--color-primary);
}

.about-list li::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 8px;
    width: 5px;
    height: 9px;
    border: solid var(--color-primary);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Inquiry */
.inquiry-section {
    padding: 96px 0;
}

.inquiry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
}

.inquiry-info .section-tag {
    margin-bottom: 20px;
}

.inquiry-info .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.inquiry-info p {
    font-size: 16px;
    color: var(--color-body);
    line-height: 1.8;
}

.inquiry-contact {
    margin-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    font-size: 15px;
    color: var(--color-body);
}

.inquiry-contact > div {
    display: flex;
    align-items: center;
    gap: 8px;
}

.inquiry-contact strong {
    color: var(--color-heading);
    font-weight: 600;
    min-width: 48px;
}

.inquiry-form-wrapper {
    background: var(--color-bg);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    position: relative;
}

.inquiry-form .form-row {
    margin-bottom: 18px;
}

.inquiry-form .form-row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.inquiry-form input,
.inquiry-form textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-light);
    color: var(--color-heading);
    font-size: 15px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.inquiry-form input::placeholder,
.inquiry-form textarea::placeholder {
    color: var(--color-muted);
}

.inquiry-form input:focus,
.inquiry-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.1);
    background: var(--color-bg);
}

/* CTA Banner */
.cta-banner-section {
    padding: 80px 0;
    background: var(--color-bg-light);
}

.cta-banner {
    background: var(--color-dark);
    border-radius: var(--radius-xl);
    padding: 56px 64px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.cta-banner h2 {
    color: #fff;
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: 12px;
    font-weight: 800;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.75);
    font-size: 17px;
    margin-bottom: 32px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.cta-banner .hero-actions {
    justify-content: center;
}

.cta-banner .btn-primary {
    background: #fff;
    color: var(--color-dark);
}

.cta-banner .btn-primary:hover {
    background: var(--color-primary-light);
    color: var(--color-dark);
}

/* Featured products */
.featured-products-section {
    padding: 96px 0;
    background: var(--color-bg);
}

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

.product-card {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform 0.25s ease, border-color 0.25s ease;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary-light);
}

.product-image {
    display: block;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    background: var(--color-bg-soft);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.04);
}

.product-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-body h3 {
    font-size: 16px;
    margin-bottom: 8px;
    font-weight: 600;
    line-height: 1.4;
}

.product-body h3 a {
    color: var(--color-heading);
    transition: color 0.2s ease;
}

.product-body h3 a:hover {
    color: var(--color-primary);
}

.product-price {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 14px;
    margin-top: auto;
}

.product-body .btn {
    width: fit-content;
}

.section-footer {
    text-align: center;
    margin-top: 48px;
}

.no-products {
    text-align: center;
    color: var(--color-muted);
    padding: 48px 0;
}

/* Footer */
.site-footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.65);
    padding: 72px 0 0;
    position: relative;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-primary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo-link {
    display: inline-block;
    margin-bottom: 20px;
}

.footer-logo {
    height: 52px;
    width: auto;
    filter: brightness(0) invert(1);
}

.footer-desc {
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.55);
    max-width: 320px;
}

.footer-contact {
    font-size: 14px;
    line-height: 2;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact strong {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 600;
}

.footer-links h4 {
    color: #fff;
    font-size: 15px;
    margin-bottom: 20px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.footer-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-nav li {
    margin-bottom: 10px;
}

.footer-nav a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    transition: color 0.2s ease, padding-left 0.2s ease;
    display: inline-block;
}

.footer-nav a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom p {
    margin: 0;
}

/* Page / Single */
.page-header {
    text-align: center;
    margin-bottom: 40px;
}

.page-title {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
}

.page-content,
.single-post {
    max-width: 900px;
    margin: 0 auto;
}

.entry-content {
    font-size: 16px;
    line-height: 1.85;
}

.entry-content h2,
.entry-content h3,
.entry-content h4 {
    margin-top: 36px;
}

.post-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.post-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.post-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.post-thumbnail {
    display: block;
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.post-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.post-body {
    padding: 24px;
}

.post-title {
    font-size: 18px;
    margin-bottom: 10px;
    font-weight: 700;
}

.post-title a {
    color: var(--color-heading);
}

.post-title a:hover {
    color: var(--color-primary);
}

.post-meta {
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 12px;
}

.post-excerpt {
    font-size: 14px;
    color: var(--color-body);
    margin-bottom: 16px;
    line-height: 1.7;
}

.post-excerpt p {
    margin: 0;
}

.pagination {
    margin-top: 48px;
    text-align: center;
}

.pagination .nav-links {
    display: inline-flex;
    gap: 8px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    background: var(--color-bg);
    color: var(--color-body);
    font-weight: 500;
    transition: all 0.2s ease;
}

.pagination a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.pagination .current {
    background: var(--color-primary);
    border-color: transparent;
    color: #fff;
}

/* 404 */
.error-404 {
    padding: 80px 0;
    text-align: center;
}

.error-code {
    font-size: clamp(5rem, 12vw, 8rem);
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 16px;
    font-family: var(--font-heading);
}

/* WooCommerce overrides */
.woocommerce-main {
    background: var(--color-bg);
}

.woocommerce-main .woocommerce-breadcrumb {
    font-size: 14px;
    color: var(--color-muted);
    margin-bottom: 24px;
}

.woocommerce-main .woocommerce-breadcrumb a {
    color: var(--color-primary);
}

.woocommerce-main .woocommerce-result-count {
    font-size: 14px;
    color: var(--color-muted);
}

.woocommerce-main .woocommerce-ordering select {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-light);
    color: var(--color-heading);
}

.woocommerce ul.products li.product {
    background: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 16px;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s ease;
}

.woocommerce ul.products li.product:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.woocommerce ul.products li.product .woocommerce-loop-product__title {
    font-size: 16px;
    color: var(--color-heading);
    font-weight: 600;
}

.woocommerce ul.products li.product .price {
    color: var(--color-primary);
    font-weight: 700;
}

.woocommerce button.button,
.woocommerce a.button {
    background: var(--color-primary) !important;
    color: #fff !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600 !important;
    transition: all 0.2s ease !important;
}

.woocommerce button.button:hover,
.woocommerce a.button:hover {
    background: var(--color-primary-dark) !important;
}

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

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

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

    .about-grid,
    .inquiry-grid {
        gap: 40px;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 72px;
    }

    .site-branding .site-logo {
        height: 56px;
    }

    .main-navigation {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(16px);
        padding: 24px;
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 999;
        overflow-y: auto;
    }

    .main-navigation.active {
        transform: translateX(0);
    }

    .main-navigation .nav-menu {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }

    .main-navigation .nav-menu a {
        font-size: 16px;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

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

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    body.menu-open {
        overflow: hidden;
    }

    .hero-section {
        min-height: 560px;
    }

    .hero-content {
        padding-top: 48px;
        padding-bottom: 48px;
    }

    .stats-grid,
    .product-categories,
    .industries-grid,
    .features-grid,
    .about-grid,
    .inquiry-grid,
    .products-loop,
    .post-grid {
        grid-template-columns: 1fr;
    }

    .stat-item:not(:last-child)::after {
        display: none;
    }

    .stats-grid {
        gap: 16px;
    }

    .stat-item {
        padding: 12px;
    }

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

    .inquiry-form-wrapper {
        padding: 28px 24px;
    }

    .cta-banner {
        padding: 40px 28px;
    }

    .products-section,
    .industries-section,
    .why-us-section,
    .about-section,
    .inquiry-section,
    .featured-products-section,
    .cta-banner-section {
        padding: 64px 0;
    }

    .footer-logo {
        height: 44px;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .inquiry-form .form-row-2 {
        grid-template-columns: 1fr;
    }

    .container {
        padding: 0 20px;
    }
}

/* WPC Inquiry plugin overrides */
.inquiry-form-wrapper .zc-inquiry-block {
    margin: 0;
    padding: 0;
    border: none;
    border-radius: 0;
    background: transparent;
}

.inquiry-form-wrapper .zc-inquiry-block__intro {
    display: none;
}

.inquiry-form-wrapper .zc-inquiry-form__grid {
    gap: 18px;
    margin-bottom: 18px;
}

.inquiry-form-wrapper .zc-inquiry-field label {
    color: var(--color-heading);
    font-weight: 500;
    margin-bottom: 4px;
    font-size: 14px;
}

.inquiry-form-wrapper .zc-inquiry-field input,
.inquiry-form-wrapper .zc-inquiry-field textarea {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-light);
    padding: 14px 16px;
    font-size: 15px;
    color: var(--color-heading);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    width: 100%;
}

.inquiry-form-wrapper .zc-inquiry-field input::placeholder,
.inquiry-form-wrapper .zc-inquiry-field textarea::placeholder {
    color: var(--color-muted);
}

.inquiry-form-wrapper .zc-inquiry-field input:focus,
.inquiry-form-wrapper .zc-inquiry-field textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.1);
    background: var(--color-bg);
}

.inquiry-form-wrapper .zc-btn-primary,
.zc-modal-form .zc-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-primary);
    color: #fff;
    cursor: pointer;
    transition: all 0.2s ease;
}

.inquiry-form-wrapper .zc-btn-primary:hover,
.zc-modal-form .zc-btn-primary:hover {
    background: var(--color-primary-dark);
}

.zc-modal__dialog {
    width: min(680px, calc(100% - 32px));
}

.zc-modal-form .zc-inquiry-form__grid {
    gap: 16px;
}

.single-product .single_add_to_cart_button {
    background: var(--color-primary) !important;
    color: #fff !important;
    border-radius: var(--radius-md) !important;
    font-weight: 600 !important;
    padding: 14px 24px !important;
}

.single-product-inquiry-btn {
    margin-left: 12px;
}

/* Dropdown for 设备材料 */
.main-navigation .nav-menu li.menu-item-has-children {
    position: relative;
}

.main-navigation .nav-menu .sub-menu {
    position: absolute;
    top: calc(100% - 1px);
    left: 0;
    min-width: 220px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: 8px 0;
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 1001;
}

.main-navigation .nav-menu li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-navigation .equipment-dropdown {
    min-width: 200px;
    padding: 8px 0;
    text-align: left;
}

.main-navigation .equipment-dropdown a::after {
    display: none;
}

.main-navigation .equipment-dropdown li a {
    display: block;
    padding: 8px 20px;
    font-size: 14px;
    color: var(--color-heading);
    white-space: nowrap;
    transition: color 0.2s ease, background 0.2s ease, padding-left 0.2s ease;
}

.main-navigation .equipment-dropdown li a:hover {
    color: var(--color-primary);
    background: var(--color-primary-50);
    padding-left: 24px;
}

@media (max-width: 1024px) {
    .main-navigation .equipment-dropdown {
        position: static;
        box-shadow: none;
        border: none;
        border-left: 3px solid var(--color-primary);
        border-radius: 0;
        padding: 0;
        margin: 8px 0 8px 16px;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        background: var(--color-bg-light);
    }

    .main-navigation li.menu-item-has-children:hover > .equipment-dropdown,
    .main-navigation li.menu-item-has-children.active > .equipment-dropdown {
        display: block;
    }

    .main-navigation .equipment-dropdown li a {
        white-space: normal;
        padding: 8px 16px;
    }
}

@media (max-width: 768px) {
    .inquiry-form-wrapper .zc-inquiry-form__grid {
        grid-template-columns: 1fr;
    }

    .single-product-inquiry-btn {
        margin-left: 0;
        margin-top: 12px;
        width: 100%;
    }
}