/* ========== CSS Variables ========== */
:root {
    --primary: #0a1628;
    --primary-light: #132240;
    --primary-dark: #050d1a;
    --accent: #ff6b35;
    --accent-light: #ff8555;
    --accent-dark: #e55a2b;
    --text: #1a1a2e;
    --text-light: #4a4a5a;
    --text-muted: #7a7a8a;
    --bg: #ffffff;
    --bg-alt: #f5f7fa;
    --bg-dark: #0a1628;
    --border: rgba(255,255,255,0.1);
    --glass: rgba(10, 22, 40, 0.85);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
    --shadow-glow: 0 0 40px rgba(255, 107, 53, 0.2);
    --radius-sm: 8px;
    --radius: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ========== Scrollbar ========== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg-alt);
}
::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ========== Section Containers ========== */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-header.light {
    color: #fff;
}

.section-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 16px;
    padding: 6px 16px;
    border: 1px solid var(--accent);
    border-radius: 100px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 900;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-header.light .section-title {
    color: #fff;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.section-header.light .section-desc {
    color: rgba(255,255,255,0.6);
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}
.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.3);
}
.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn-large {
    padding: 18px 40px;
    font-size: 1.05rem;
}

/* ========== Navigation ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition);
    padding: 16px 0;
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-img {
    height: 24px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.logo-text-only {
    display: flex;
    align-items: baseline;
    gap: 6px;
    text-decoration: none;
    flex-shrink: 0;
}

.logo-name {
    font-size: 1.3rem;
    font-weight: 900;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.logo-sub {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-muted);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0 auto;
}

.nav-link {
    color: var(--text);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--accent);
    background: rgba(255,107,53,0.08);
}

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

.nav-phone {
    color: var(--text);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-phone:hover {
    color: var(--accent);
}

.nav-quote {
    display: inline-block;
    padding: 10px 24px;
    background: var(--accent);
    color: #fff;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.nav-quote:hover {
    background: var(--accent-light);
    transform: translateY(-1px);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
    z-index: 1001;
}

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

/* ========== Hero Section ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: #0c1d3d;
    padding: 100px 0 60px;
}

.hero-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    display: grid;
    grid-template-columns: 4fr 8fr;
    gap: 30px;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    color: #fff;
    line-height: 1.15;
    margin: 0;
}

.title-line {
    display: block;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.6);
    margin: 0;
}

.hero-tags {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 6px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.8);
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-top: 8px;
}

.hero-cta .btn-primary {
    background: #ff6b35;
    color: #fff;
    border: none;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.hero-cta .btn-primary:hover {
    background: #ff8555;
    transform: translateY(-2px);
}

.hero-cta .btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.3);
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.hero-cta .btn-secondary:hover {
    border-color: #ff6b35;
    color: #ff6b35;
}

.hero-footer {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
    margin-top: 16px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
}

.hero-badge::before {
    content: '✓';
    color: #4ade80;
    font-weight: 700;
}

/* Hero Carousel */
.hero-carousel {
    position: relative;
    width: 100%;
    height: 580px;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.carousel-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 0.8s ease;
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.carousel-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.carousel-dots .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dots .dot.active {
    background: #ff6b35;
    transform: scale(1.2);
}

/* ========== Products Section ========== */
.products {
    padding: 100px 0;
    background: var(--bg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.product-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition-slow);
    border: 1px solid rgba(0,0,0,0.04);
}

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

.product-image {
    height: 240px;
    overflow: hidden;
    background: var(--bg-alt);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.08);
}

.product-info {
    padding: 28px;
}

.product-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.product-spec {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(255,107,53,0.1);
    color: var(--accent);
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.product-info p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.6;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.product-link:hover {
    gap: 8px;
}

/* ========== Advantages Section ========== */
.advantages {
    padding: 100px 0;
    background: var(--primary);
}

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

.advantage-card {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-lg);
    padding: 40px 28px;
    transition: var(--transition-slow);
    position: relative;
    overflow: hidden;
}

.advantage-card:hover {
    background: rgba(255,255,255,0.06);
    transform: translateY(-4px);
    border-color: rgba(255,107,53,0.2);
}

.advantage-number {
    position: absolute;
    top: 20px;
    right: 24px;
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(255,255,255,0.04);
    line-height: 1;
}

.advantage-icon {
    width: 56px;
    height: 56px;
    background: rgba(255,107,53,0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    margin-bottom: 24px;
}

.advantage-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.6;
}

/* ========== Scenes Section ========== */
.scenes {
    padding: 100px 0;
    background: var(--bg);
}

.scenes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.scenes-grid-4x2 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.scene-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition-slow);
    border: 1px solid rgba(0,0,0,0.04);
    background: #fff;
}

.scene-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.scene-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.scene-image {
    position: relative;
    height: 180px;
    overflow: hidden;
}

.scenes-grid-4x2 .scene-image {
    height: 160px;
}

.scene-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.scene-card:hover .scene-image img {
    transform: scale(1.08);
}

.scene-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10,22,40,0.8) 0%, transparent 60%);
    display: flex;
    align-items: flex-end;
    padding: 16px;
}

.scene-content {
    padding: 20px;
}

.scene-content h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.scene-content p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.5;
}

/* ========== News Section ========== */
.news {
    padding: 100px 0;
    background: var(--bg-alt);
}

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

.news-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow);
    transition: var(--transition-slow);
    border: 1px solid rgba(0,0,0,0.04);
    display: flex;
    gap: 20px;
}

.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    height: 60px;
    background: var(--accent);
    border-radius: var(--radius-sm);
    color: #fff;
    flex-shrink: 0;
}

.news-day {
    font-size: 1.4rem;
    font-weight: 900;
    line-height: 1;
}

.news-month {
    font-size: 0.7rem;
    opacity: 0.9;
}

.news-content {
    flex: 1;
}

.news-tag {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(255,107,53,0.1);
    color: var(--accent);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.news-content h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-content p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ========== AOS Animations ========== */
[data-aos] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

[data-aos="fade-up"][data-aos-delay="0"] { transition-delay: 0s; }
[data-aos="fade-up"][data-aos-delay="50"] { transition-delay: 0.05s; }
[data-aos="fade-up"][data-aos-delay="100"] { transition-delay: 0.1s; }
[data-aos="fade-up"][data-aos-delay="150"] { transition-delay: 0.15s; }
[data-aos="fade-up"][data-aos-delay="200"] { transition-delay: 0.2s; }
[data-aos="fade-up"][data-aos-delay="250"] { transition-delay: 0.25s; }
[data-aos="fade-up"][data-aos-delay="300"] { transition-delay: 0.3s; }
[data-aos="fade-up"][data-aos-delay="350"] { transition-delay: 0.35s; }

/* ========== Resources Section ========== */
.resources {
    padding: 100px 0;
    background: var(--bg);
}

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

.resource-card {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: var(--shadow);
    transition: var(--transition-slow);
    border: 1px solid rgba(0,0,0,0.04);
    text-align: center;
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.resource-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: #fff;
}

.resource-icon.pdf { background: #ef4444; }
.resource-icon.tool { background: #3b82f6; }
.resource-icon.video { background: #8b5cf6; }

.resource-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-alt);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.resource-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.resource-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 24px;
    line-height: 1.6;
}

.resource-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.resource-btn:hover {
    gap: 8px;
}

/* ========== CTA Section ========== */
.cta-section {
    padding: 100px 0;
    position: relative;
    overflow: hidden;
    background: var(--primary);
}

.cta-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 50%, rgba(255,107,53,0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 50%, rgba(19,34,64,0.5) 0%, transparent 50%);
}

.cta-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta-content h2 {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    font-weight: 900;
    color: #fff;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.6);
    margin-bottom: 32px;
}

/* ========== Footer ========== */
.footer {
    background: var(--primary-dark);
    padding: 80px 0 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo-text {
    display: flex;
    align-items: baseline;
    gap: 6px;
    margin-bottom: 16px;
}

.footer-logo-text .logo-name {
    font-size: 1.3rem;
    font-weight: 900;
    color: #fff;
}

.footer-logo-text .logo-sub {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

.footer-brand p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.6;
    margin-bottom: 16px;
}

.footer-cert {
    display: flex;
    gap: 8px;
}

.cert-badge {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 6px;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.6);
}

.footer-links h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}

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

.footer-links ul li a {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    transition: var(--transition);
}

.footer-links ul li a:hover {
    color: var(--accent);
}

.footer-contact h4 {
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 20px;
}

.footer-contact ul li {
    margin-bottom: 16px;
}

.contact-label {
    display: block;
    font-size: 0.75rem;
    color: rgba(255,255,255,0.4);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-value {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.3);
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    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(--accent-light);
    transform: translateY(-4px);
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero-carousel {
        height: 300px;
    }
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .scenes-grid-4x2 {
        grid-template-columns: repeat(2, 1fr);
    }
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .resources-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: #fff;
        flex-direction: column;
        padding: 80px 24px 24px;
        transition: right 0.3s ease;
        box-shadow: -4px 0 24px rgba(0,0,0,0.1);
    }
    .nav-menu.active {
        right: 0;
    }
    .nav-link {
        color: var(--text);
        padding: 12px 0;
        border-bottom: 1px solid rgba(0,0,0,0.06);
    }
    .nav-right {
        display: none;
    }
    .nav-toggle {
        display: flex;
    }
    .hero-title {
        font-size: 2rem;
    }
    .products-grid {
        grid-template-columns: 1fr;
    }
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    .scenes-grid-4x2 {
        grid-template-columns: 1fr;
    }
    .news-grid {
        grid-template-columns: 1fr;
    }
    .resources-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .news-card {
        flex-direction: column;
        gap: 16px;
    }
    .news-date {
        align-self: flex-start;
    }
}

/* ========== Product Categories Page ========== */
.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    padding: 80px 0 40px;
    text-align: center;
    color: white;
}

.page-hero h1 {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 16px;
}

.page-hero p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.breadcrumb {
    background: var(--bg-alt);
    padding: 16px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.breadcrumb .section-container {
    font-size: 0.9rem;
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.3s;
}

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

.breadcrumb span {
    color: var(--text);
    font-weight: 500;
}

.series-nav {
    background: white;
    padding: 20px 0;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    position: sticky;
    top: 70px;
    z-index: 100;
}

.series-nav .section-container {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.series-nav-item {
    padding: 10px 24px;
    border-radius: 30px;
    background: var(--bg-alt);
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    font-size: 0.95rem;
}

.series-nav-item:hover {
    background: var(--primary);
    color: white;
}

.series-nav-item.active {
    background: var(--accent);
    color: white;
}

.product-categories {
    padding: 80px 0;
}

.category-section {
    margin-bottom: 80px;
    scroll-margin-top: 240px;
    position: relative;
}

.category-section::before {
    content: "";
    display: block;
    height: 240px;
    margin-top: -240px;
    visibility: hidden;
    pointer-events: none;
}

.category-header {
    text-align: center;
    margin-bottom: 40px;
}

.category-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.category-header p {
    color: var(--text-light);
    font-size: 1rem;
}

.series-section {
    margin-bottom: 60px;
}

.series-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 30px;
    padding-left: 20px;
    border-left: 4px solid var(--accent);
}

.product-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-item {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.product-item-image {
    aspect-ratio: 1;
    background: linear-gradient(135deg, #f0f4f8 0%, #e8eef4 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
}

.product-item-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition);
}

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

.product-item-name {
    background: #2196F3;
    color: white;
    text-align: center;
    padding: 16px;
    font-weight: 600;
    font-size: 1.1rem;
}

@media (max-width: 768px) {
    .product-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .page-hero h1 {
        font-size: 2rem;
    }
    
    .series-title {
        font-size: 1.2rem;
    }
    
    .series-nav {
        top: 60px;
    }
    
    .series-nav-item {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .product-grid-3 {
        grid-template-columns: 1fr;
    }
}

/* ========== WeChat Popup ========== */
.wechat-popup-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.wechat-popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.wechat-popup {
    background: #fff;
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    max-width: 360px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s ease;
}

.wechat-popup-overlay.active .wechat-popup {
    transform: scale(1) translateY(0);
}

.wechat-popup-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

.wechat-popup-close:hover {
    background: rgba(0,0,0,0.1);
}

.wechat-popup-close svg {
    width: 18px;
    height: 18px;
    stroke: var(--text-light);
}

.wechat-popup h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.wechat-popup p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.wechat-qrcode {
    width: 200px;
    height: 200px;
    margin: 0 auto 16px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid rgba(0,0,0,0.08);
}

.wechat-qrcode img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.wechat-popup-tip {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: var(--bg-alt);
    padding: 8px 16px;
    border-radius: 8px;
    display: inline-block;
}

/* News card link styling */
.news-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.news-card-link:hover .news-content h3 {
    color: var(--accent);
}

/* News article page */
.news-article {
    padding: 160px 0 80px;
    background: var(--bg);
}

.news-article-header {
    max-width: 800px;
    margin: 0 auto 48px;
}

.news-article-header .news-tag {
    margin-bottom: 16px;
}

.news-article-header h1 {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 900;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.3;
}

.news-article-meta {
    display: flex;
    gap: 16px;
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 32px;
}

.news-article-body {
    max-width: 800px;
    margin: 0 auto;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text-light);
}

.news-article-body p {
    margin-bottom: 20px;
}

.news-article-body h2 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    margin: 40px 0 16px;
}

.news-article-body ul {
    list-style: disc;
    padding-left: 24px;
    margin-bottom: 20px;
}

.news-article-body li {
    margin-bottom: 8px;
}

.news-article-nav {
    max-width: 800px;
    margin: 48px auto 0;
    padding-top: 32px;
    border-top: 1px solid rgba(0,0,0,0.06);
    display: flex;
    justify-content: space-between;
}

.news-article-nav a {
    color: var(--accent);
    font-weight: 600;
    transition: var(--transition);
}

.news-article-nav a:hover {
    gap: 8px;
}

/* About Jiangjie Section */
.about-jiangjie {
    background: #0a1628;
    padding: 100px 0 80px;
    color: #fff;
}

.about-jj-header {
    text-align: center;
    margin-bottom: 60px;
}

.about-jj-label {
    display: inline-block;
    padding: 8px 24px;
    border: 1px solid var(--accent);
    border-radius: 30px;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 24px;
}

.about-jj-title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 900;
    color: #fff;
    margin-bottom: 16px;
}

.about-jj-subtitle {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.6);
    max-width: 600px;
    margin: 0 auto;
}

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

.about-jj-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 16px;
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.about-jj-card:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.15);
    transform: translateY(-4px);
}

.about-jj-card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
}

.about-jj-icon {
    width: 48px;
    height: 48px;
    background: rgba(255,107,53,0.15);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.about-jj-num {
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(255,255,255,0.08);
    line-height: 1;
}

.about-jj-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
}

.about-jj-card p {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.7;
}

@media (max-width: 992px) {
    .about-jj-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .about-jj-grid {
        grid-template-columns: 1fr;
    }
    .about-jiangjie {
        padding: 60px 0 40px;
    }
}