:root {
    --primary: #1a1a2e;
    --secondary: #16213e;
    --accent: #e94560;
    --accent2: #0f3460;
    --gold: #d4a853;
    --text: #2c2c2c;
    --text-light: #666;
    --white: #ffffff;
    --bg-light: #f8f8f8;
    --bg-dark: #0a0a0a;
    --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --gradient-accent: linear-gradient(135deg, #e94560 0%, #c23152 100%);
    --shadow: 0 10px 40px rgba(0,0,0,0.1);
    --shadow-hover: 0 20px 60px rgba(0,0,0,0.15);
    --transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text);
    background: var(--white);
    overflow-x: hidden;
    line-height: 1.8;
}

/* ===== Loading Screen ===== */
.loader {
    position: fixed;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: var(--primary);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s, visibility 0.6s;
}
.loader.hidden { opacity: 0; visibility: hidden; }
.loader-wheel {
    width: 60px; height: 60px;
    border: 3px solid rgba(255,255,255,0.2);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ===== Navigation ===== */
.navbar {
    position: fixed; top: 0; left: 0;
    width: 100%;
    z-index: 1000;
    padding: 0 40px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}
.navbar.scrolled {
    background: rgba(10,10,10,0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
    height: 70px;
}
.nav-logo {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none;
    z-index: 1001;
}
.nav-logo img { height: 42px; transition: var(--transition); }
.navbar.scrolled .nav-logo img { height: 36px; }
.nav-logo-text {
    font-family: 'Oswald', sans-serif;
    font-size: 22px; font-weight: 700;
    color: var(--white);
    letter-spacing: 2px;
}
.nav-links {
    display: flex; list-style: none; gap: 5px;
    align-items: center;
}
.nav-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 14px; font-weight: 500;
    padding: 10px 18px;
    border-radius: 25px;
    transition: var(--transition);
    letter-spacing: 1px;
    position: relative;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--white);
    background: rgba(255,255,255,0.1);
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    z-index: 1001;
    padding: 10px;
}
.nav-toggle span {
    width: 28px; height: 2px;
    background: var(--white);
    transition: var(--transition);
    border-radius: 2px;
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

/* ===== Hero Section ===== */
.hero {
    position: relative;
    width: 100%; height: 100vh;
    min-height: 700px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.hero-slider {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
}
.hero-slide {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    filter: brightness(0.55);
    opacity: 0;
    transform: scale(1.15);
    transition: opacity 1.5s ease, transform 6s ease;
}
.hero-slide.active {
    opacity: 1;
    transform: scale(1.05);
}
.hero-slide.zoom-out {
    transform: scale(1);
}
/* 轮播指示器 */
.hero-dots {
    position: absolute;
    bottom: 120px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    gap: 12px;
}
.hero-dot {
    width: 10px; height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    border: none;
    cursor: pointer;
    transition: all 0.4s ease;
}
.hero-dot.active {
    background: var(--accent);
    box-shadow: 0 0 12px rgba(233,69,96,0.6);
    width: 30px;
    border-radius: 5px;
}
/* 左右箭头 */
.hero-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 3;
    width: 50px; height: 50px;
    border-radius: 50%;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.3);
    color: var(--white);
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    backdrop-filter: blur(5px);
}
.hero-arrow:hover {
    background: rgba(255,255,255,0.2);
    border-color: var(--white);
}
.hero-arrow.prev { left: 30px; }
.hero-arrow.next { right: 30px; }
.hero-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(to bottom, 
        rgba(10,10,10,0.7) 0%, 
        rgba(10,10,10,0.3) 50%,
        rgba(10,10,10,0.7) 100%);
}
.hero-content {
    position: relative; z-index: 2;
    text-align: center;
    padding: 0 20px;
}
.hero-badge {
    display: inline-block;
    padding: 8px 30px;
    border: 1px solid rgba(255,255,255,0.4);
    border-radius: 50px;
    color: var(--white);
    font-size: 13px;
    letter-spacing: 4px;
    text-transform: uppercase;
    margin-bottom: 30px;
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,0.05);
}
.hero-title {
    font-family: 'Oswald', sans-serif;
    font-size: 100px;
    font-weight: 700;
    color: var(--white);
    line-height: 1;
    letter-spacing: 8px;
    margin-bottom: 20px;
}
.hero-title span { color: var(--accent); }
.hero-subtitle {
    font-size: 20px;
    color: rgba(255,255,255,0.8);
    letter-spacing: 6px;
    font-weight: 300;
    margin-bottom: 40px;
}
.hero-scroll {
    position: absolute; bottom: 40px; left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    animation: bounce 2s infinite;
}
.hero-scroll a {
    color: var(--white);
    font-size: 13px;
    text-decoration: none;
    letter-spacing: 3px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}
.hero-scroll .line {
    width: 1px; height: 40px;
    background: rgba(255,255,255,0.5);
}
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-15px); }
    60% { transform: translateX(-50%) translateY(-7px); }
}

/* ===== Section Common ===== */
.section {
    padding: 120px 40px;
    position: relative;
}
.section-dark {
    background: var(--bg-dark);
    color: var(--white);
}
.section-light {
    background: var(--bg-light);
}
.container {
    max-width: 1200px;
    margin: 0 auto;
}
.section-label {
    display: inline-block;
    font-family: 'Oswald', sans-serif;
    font-size: 13px;
    letter-spacing: 4px;
    color: var(--accent);
    text-transform: uppercase;
    margin-bottom: 15px;
}
.section-title {
    font-size: 48px;
    font-weight: 900;
    margin-bottom: 20px;
    line-height: 1.2;
}
.section-title.light { color: var(--white); }
.section-desc {
    font-size: 17px;
    color: var(--text-light);
    max-width: 600px;
    line-height: 1.8;
}
.section-desc.light { color: rgba(255,255,255,0.6); }
.divider {
    width: 60px; height: 3px;
    background: var(--accent);
    margin: 30px 0;
}
.divider.center { margin: 30px auto; }

/* ===== About Section ===== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}
.about-image {
    position: relative;
}
.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: var(--shadow-hover);
}
.about-image::before {
    content: '';
    position: absolute;
    top: -20px; left: -20px;
    width: 100%; height: 100%;
    border: 3px solid var(--accent);
    border-radius: 10px;
    z-index: -1;
}
.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}
.stat-item {
    text-align: center;
    padding: 20px;
    border-radius: 10px;
    background: var(--white);
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.stat-item:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.stat-number {
    font-family: 'Oswald', sans-serif;
    font-size: 40px; font-weight: 700;
    color: var(--accent);
}
.stat-label { font-size: 14px; color: var(--text-light); margin-top: 5px; }

.branch-list {
    list-style: none;
    margin-top: 25px;
}
.branch-list li {
    padding: 12px 0;
    border-bottom: 1px solid rgba(0,0,0,0.08);
    font-size: 15px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.branch-list li i {
    color: var(--accent);
    font-size: 18px;
    width: 24px;
    text-align: center;
}

/* ===== Products Section ===== */
.section-dark .section-label { color: var(--accent); }
.products-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
    margin-top: 60px;
}
.product-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 3/4;
}
.product-card img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}
.product-card:hover img { transform: scale(1.1); }
.product-overlay {
    position: absolute;
    bottom: 0; left: 0;
    width: 100%;
    padding: 30px 20px;
    background: linear-gradient(to top, rgba(0,0,0,0.9), transparent);
    transform: translateY(10px);
    transition: var(--transition);
}
.product-card:hover .product-overlay { transform: translateY(0); }
.product-overlay h3 {
    color: var(--white);
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 5px;
}
.product-overlay span {
    color: var(--accent);
    font-size: 13px;
    letter-spacing: 2px;
}

/* ===== Values Section ===== */
.values-wrapper {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 60px;
}
.value-card {
    background: var(--white);
    border-radius: 16px;
    padding: 50px 40px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.value-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}
.value-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 4px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transition: transform 0.6s ease;
}
.value-card:hover::before { transform: scaleX(1); }
.value-icon {
    width: 80px; height: 80px;
    margin: 0 auto 25px;
    background: linear-gradient(135deg, var(--accent2), var(--accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--white);
}
.value-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 12px;
}
.value-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.8;
}
.value-highlight {
    margin-top: 60px;
    text-align: center;
    padding: 50px;
    background: var(--gradient-dark);
    border-radius: 20px;
    color: var(--white);
}
.value-highlight .icon-row {
    font-size: 48px;
    margin-bottom: 20px;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}
.value-highlight h2 {
    font-size: 36px;
    font-weight: 900;
    margin-bottom: 10px;
}
.value-highlight p {
    font-size: 20px;
    color: rgba(255,255,255,0.7);
}

/* ===== Cooperation Section ===== */
.coop-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}
.coop-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 45px 35px;
    text-align: center;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}
.coop-card:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--accent);
    transform: translateY(-8px);
}
.coop-icon {
    font-size: 45px;
    color: var(--accent);
    margin-bottom: 25px;
}
.coop-card h3 {
    font-size: 22px;
    color: var(--white);
    margin-bottom: 12px;
}
.coop-card p {
    color: rgba(255,255,255,0.6);
    font-size: 15px;
    line-height: 1.8;
}

/* ===== Brands Section ===== */
.brands-cloud {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin-top: 60px;
}
.brand-tag {
    padding: 14px 28px;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 50px;
    font-size: 15px;
    font-weight: 500;
    transition: var(--transition);
    cursor: default;
    background: var(--white);
}
.brand-tag:hover {
    background: var(--accent);
    color: var(--white);
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(233,69,96,0.3);
}
.brand-tag.cn { font-family: 'Noto Sans SC', sans-serif; }
.brand-tag.en { font-family: 'Oswald', sans-serif; letter-spacing: 1px; }

/* ===== Contact Section ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 60px;
}
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 25px;
}
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 18px;
    padding: 20px;
    border-radius: 12px;
    background: var(--white);
    box-shadow: var(--shadow);
    transition: var(--transition);
}
.contact-item:hover { box-shadow: var(--shadow-hover); transform: translateX(5px); }
.contact-item .icon {
    width: 50px; height: 50px;
    border-radius: 12px;
    background: var(--gradient-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--white);
    font-size: 20px;
}
.contact-item .info h4 {
    font-size: 16px;
    color: var(--text);
    margin-bottom: 5px;
}
.contact-item .info p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}
.contact-qr {
    text-align: center;
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.contact-qr img {
    width: 200px;
    border-radius: 10px;
    margin-bottom: 15px;
}
.contact-qr p {
    color: var(--text-light);
    font-size: 15px;
}
.social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 24px;
    flex-wrap: wrap;
}
.social-link {
    width: 48px; height: 48px;
    border-radius: 50%;
    background: var(--bg-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    color: var(--text-light);
    text-decoration: none;
    transition: var(--transition);
}
.social-link:hover {
    background: var(--accent);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(233,69,96,0.35);
}
/* 社交媒体标题 */
.social-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}
.social-subtitle {
    font-size: 13px;
    color: #aaa;
    margin-bottom: 16px;
}
/* 分隔线 */
.social-divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(0,0,0,0.08), transparent);
    margin: 28px 0 24px;
}
/* 公众号信息条 */
.contact-qr-footer {
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px dashed rgba(0,0,0,0.1);
}
.contact-qr-footer .qr-tagline {
    font-size: 14px;
    color: var(--text);
    font-weight: 500;
    letter-spacing: 1px;
}
.contact-qr-footer .qr-tagline i {
    color: var(--accent);
    margin-right: 6px;
}
.contact-qr-footer .qr-note {
    font-size: 12px;
    color: #bbb;
    margin-top: 8px;
    line-height: 1.8;
}

/* ===== Footer ===== */
.footer {
    background: var(--primary);
    color: rgba(255,255,255,0.6);
    text-align: center;
    padding: 50px 40px;
    font-size: 14px;
}
.footer .brand-name {
    font-family: 'Oswald', sans-serif;
    font-size: 24px;
    color: var(--white);
    letter-spacing: 3px;
    margin-bottom: 15px;
}
.footer a {
    color: var(--accent);
    text-decoration: none;
}

/* ===== Parallax Divider ===== */
.parallax-divider {
    height: 400px;
    background-attachment: fixed;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.parallax-divider::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.6);
}
.parallax-divider .content {
    position: relative;
    text-align: center;
    color: var(--white);
}
.parallax-divider .content h2 {
    font-family: 'Oswald', sans-serif;
    font-size: 60px;
    letter-spacing: 10px;
    margin-bottom: 15px;
}
.parallax-divider .content p {
    font-size: 18px;
    letter-spacing: 4px;
    opacity: 0.8;
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px; right: 30px;
    width: 50px; height: 50px;
    background: var(--accent);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 20px;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 20px rgba(233,69,96,0.4);
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(233,69,96,0.6);
}

/* ===== Responsive ===== */
@media (max-width: 1200px) {
    .products-grid { grid-template-columns: repeat(3, 1fr); }
    .section { padding: 100px 30px; }
}
@media (max-width: 992px) {
    .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 50px; }
    .coop-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .hero-title { font-size: 50px; letter-spacing: 4px; }
    .hero-subtitle { font-size: 14px; letter-spacing: 3px; }
    .hero-arrow { width: 36px; height: 36px; font-size: 14px; }
    .hero-arrow.prev { left: 10px; }
    .hero-arrow.next { right: 10px; }
    .hero-dots { bottom: 100px; gap: 8px; }
    .hero-dot { width: 8px; height: 8px; }
    .hero-dot.active { width: 24px; }
    .section-title { font-size: 32px; }
    .section { padding: 80px 20px; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .values-wrapper, .coop-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .stat-number { font-size: 28px; }
    .nav-toggle { display: flex; }
    .nav-links {
        position: fixed;
        top: 0; right: -100%;
        width: 280px; height: 100vh;
        background: rgba(10,10,10,0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 100px 30px 40px;
        transition: var(--transition);
        gap: 10px;
    }
    .nav-links.active { right: 0; }
    .nav-links a { font-size: 16px; padding: 12px 20px; }
    .parallax-divider { height: 250px; }
    .parallax-divider .content h2 { font-size: 36px; }
    .brands-cloud { gap: 10px; }
    .brand-tag { padding: 10px 20px; font-size: 13px; }
}
@media (max-width: 480px) {
    .hero-title { font-size: 36px; }
    .section-title { font-size: 28px; }
    .products-grid { grid-template-columns: 1fr 1fr; }
    .about-stats { grid-template-columns: 1fr; }
}