/* ============================================
   南通瑞格体育用品有限公司 | ROGE Fitness
   黑红搭配 - 参考 BodyKore 布局
   Black + Red Theme - BodyKore-inspired Layout
   ============================================ */

/* --- Variables --- */
:root {
    --red: #e63920;
    --red-dark: #c52815;
    --red-hover: #ff4d3a;
    --black: #111111;
    --dark-bg: #1a1a1a;
    --dark-card: #252525;
    --gray-dark: #555;
    --gray-mid: #999;
    --gray-light: #bbb;
    --white: #fff;
    --white-soft: #f5f5f5;
    --border: rgba(255,255,255,0.08);
    --radius: 6px;
    --radius-lg: 12px;
    --transition: 0.3s ease;
    --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
    --max: 1280px;
}

/* --- Reset --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font); background: var(--black); color: var(--white-soft); line-height: 1.6; overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ===== Header / Navigation ===== */
.header {
    position: sticky; top: 0; z-index: 1000;
    background: rgba(17,17,17,0.97); backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 72px; max-width: var(--max); margin: 0 auto; padding: 0 24px;
}
.logo img { height: 40px; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
    padding: 10px 16px; font-size: 0.88rem; font-weight: 500;
    color: var(--gray-light); border-radius: var(--radius);
    transition: var(--transition); white-space: nowrap; position: relative;
}
.nav-link:hover, .nav-link.active { color: var(--white); }
.nav-link.active::after {
    content: ''; position: absolute; bottom: 4px; left: 16px; right: 16px;
    height: 2px; background: var(--red); border-radius: 1px;
}
.nav-dropdown { position: relative; }
.nav-dropdown:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown {
    opacity: 0; visibility: hidden; transform: translateY(8px);
    position: absolute; top: 100%; left: 0; background: var(--dark-card);
    border: 1px solid var(--border); border-radius: var(--radius-lg);
    min-width: 200px; padding: 8px; box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    transition: var(--transition); z-index: 100;
}
.dropdown li a {
    display: block; padding: 10px 14px; font-size: 0.85rem;
    color: var(--gray-light); border-radius: var(--radius);
    transition: var(--transition);
}
.dropdown li a:hover { background: rgba(230,57,32,0.1); color: var(--red); }
.header-actions { display: flex; align-items: center; gap: 16px; }
.header-phone {
    display: flex; align-items: center; gap: 6px; font-size: 0.85rem;
    color: var(--gray-light); transition: var(--transition);
}
.header-phone:hover { color: var(--red); }
.header-phone svg { flex-shrink: 0; }

/* Mobile nav toggle */
.menu-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; z-index: 1001; }
.menu-toggle span { display: block; width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }

/* ===== Hero Section ===== */
.hero {
    position: relative; min-height: 500px; display: flex; align-items: center; justify-content: center;
    text-align: center; overflow: hidden;
    background: linear-gradient(160deg, #1a0a08 0%, #1a1010 40%, #111 100%);
}
.hero::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse at center, rgba(230,57,32,0.15) 0%, transparent 60%);
    pointer-events: none;
}
.hero-content { position: relative; z-index: 2; padding: 80px 24px; }
.hero h1 {
    font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 900; letter-spacing: 4px;
    text-transform: uppercase; margin-bottom: 16px;
}
.hero h1 .red { color: var(--red); }
.hero p {
    font-size: 1.1rem; color: var(--gray-mid); max-width: 600px;
    margin: 0 auto 32px; line-height: 1.7;
}
.hero-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 32px; border-radius: var(--radius); font-size: 0.95rem; font-weight: 600; cursor: pointer; transition: var(--transition); border: none; }
.btn-primary { background: var(--red); color: var(--white); }
.btn-primary:hover { background: var(--red-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,57,32,0.3); }
.btn-outline { background: transparent; color: var(--white); border: 1px solid rgba(255,255,255,0.2); }
.btn-outline:hover { border-color: var(--red); color: var(--red); transform: translateY(-2px); }

/* Hero product images row */
.hero-products {
    display: flex; justify-content: center; gap: 12px; flex-wrap: wrap;
    margin-top: 48px; opacity: 0.6;
}
.hero-products img {
    width: 120px; height: 120px; object-fit: cover; border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.06); transition: var(--transition);
}
.hero-products img:hover { transform: scale(1.05); opacity: 0.9; }

/* ===== Section Title ===== */
.section-header { text-align: center; margin-bottom: 54px; }
.section-header h2 { font-size: 2rem; font-weight: 800; margin-bottom: 8px; letter-spacing: 2px; }
.section-header .subtitle { font-size: 0.9rem; color: var(--red); font-weight: 600; text-transform: uppercase; letter-spacing: 3px; }
.section { padding: 90px 0; }
.section-alt { background: var(--dark-bg); }

/* ===== Category Grid (3 columns, bodykore-style) ===== */
.category-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.category-card {
    background: var(--dark-card); border-radius: var(--radius-lg); overflow: hidden;
    border: 1px solid var(--border); transition: var(--transition);
    cursor: pointer; position: relative;
}
.category-card:hover { transform: translateY(-6px); border-color: rgba(230,57,32,0.3); box-shadow: 0 16px 48px rgba(0,0,0,0.4); }
.category-img {
    height: 240px; overflow: hidden; position: relative;
}
.category-img img {
    width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease;
}
.category-card:hover .category-img img { transform: scale(1.08); }
.category-tag {
    position: absolute; top: 16px; left: 16px; background: var(--red);
    color: var(--white); font-size: 0.72rem; font-weight: 700;
    padding: 5px 12px; border-radius: 4px; text-transform: uppercase;
    letter-spacing: 1px;
}
.category-body { padding: 24px; }
.category-body h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 4px; }
.category-body .cat-count { font-size: 0.82rem; color: var(--gray-mid); margin-bottom: 16px; }
.category-body .view-more {
    display: inline-flex; align-items: center; gap: 6px;
    color: var(--red); font-weight: 600; font-size: 0.9rem;
    transition: var(--transition);
}
.category-body .view-more:hover { gap: 12px; }
.category-body .view-more svg { transition: var(--transition); }

/* ===== Product Grid (4 columns) ===== */
.product-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.product-card {
    background: var(--dark-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition);
    cursor: pointer;
}
.product-card:hover { border-color: rgba(230,57,32,0.25); transform: translateY(-4px); }
.product-card-img { height: 180px; overflow: hidden; }
.product-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.product-card:hover .product-card-img img { transform: scale(1.06); }
.product-card-body { padding: 16px; }
.product-card-body h4 { font-size: 0.92rem; font-weight: 600; margin-bottom: 4px; }
.product-card-body .sku { font-size: 0.75rem; color: var(--red); font-weight: 600; }
.product-card-body .desc { font-size: 0.78rem; color: var(--gray-mid); margin-top: 6px; }

/* ===== Stats Bar ===== */
.stats-bar {
    background: var(--red); padding: 48px 0;
}
.stats-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center;
}
.stat-item h3 { font-size: 2.4rem; font-weight: 900; margin-bottom: 4px; }
.stat-item p { font-size: 0.88rem; opacity: 0.9; }

/* ===== About Section ===== */
.about-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-text h2 { font-size: 2rem; font-weight: 800; margin-bottom: 20px; }
.about-text .highlight { font-size: 1rem; color: var(--red); font-weight: 600; margin-bottom: 16px; }
.about-text p { font-size: 0.92rem; color: var(--gray-mid); line-height: 1.8; margin-bottom: 12px; }
.about-image { border-radius: var(--radius-lg); overflow: hidden; border: 1px solid var(--border); }
.about-image img { width: 100%; height: auto; }

/* ===== Factory Showcase ===== */
.factory-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.factory-item { border-radius: var(--radius-lg); overflow: hidden; position: relative; cursor: pointer; }
.factory-item img { width: 100%; height: 200px; object-fit: cover; transition: transform 0.4s; }
.factory-item:hover img { transform: scale(1.05); }
.factory-label {
    position: absolute; bottom: 0; left: 0; right: 0; padding: 12px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: var(--white); font-size: 0.85rem; font-weight: 600;
}

/* ===== Contact Page ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-info { background: var(--dark-card); border-radius: var(--radius-lg); padding: 40px; border: 1px solid var(--border); }
.contact-info h3 { font-size: 1.5rem; margin-bottom: 8px; }
.contact-details { display: flex; flex-direction: column; gap: 20px; margin-top: 32px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; }
.contact-icon {
    width: 40px; height: 40px; border-radius: 50%; background: rgba(230,57,32,0.15);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.contact-item-label { font-size: 0.78rem; color: var(--gray-mid); margin-bottom: 2px; }
.contact-item-value { font-size: 0.92rem; }
.contact-form-panel { background: var(--dark-card); border-radius: var(--radius-lg); padding: 40px; border: 1px solid var(--border); }
.contact-form-panel h3 { font-size: 1.5rem; margin-bottom: 24px; }
.form-group { margin-bottom: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group input, .form-group textarea {
    width: 100%; padding: 14px 16px; background: var(--black); border: 1px solid var(--border); border-radius: var(--radius); color: var(--white); font-size: 0.9rem; font-family: var(--font); outline: none; transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--red); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-submit { width: 100%; }

/* ===== Footer (5 columns, bodykore-style) ===== */
.footer {
    background: var(--dark-bg); border-top: 1px solid var(--border);
    padding: 72px 0 0;
}
.footer-grid {
    display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr 1fr; gap: 40px;
    padding-bottom: 48px;
}
.footer-brand img { height: 36px; margin-bottom: 14px; }
.footer-brand p { font-size: 0.84rem; color: var(--gray-mid); margin-bottom: 8px; }
.footer-brand .tagline { font-size: 1rem; font-weight: 700; color: var(--red); margin-bottom: 14px; }
.footer-brand a { color: var(--gray-light); font-size: 0.84rem; display: flex; align-items: center; gap: 6px; margin-bottom: 4px; }
.footer-brand a:hover { color: var(--red); }
.footer-col h4 { font-size: 0.85rem; font-weight: 700; color: var(--white); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 1px; }
.footer-col a { display: block; font-size: 0.84rem; color: var(--gray-mid); padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--red); padding-left: 4px; }
.footer-bottom {
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: 16px; padding: 20px 0;
    border-top: 1px solid var(--border); font-size: 0.8rem; color: var(--gray-dark);
}
.footer-bottom a { color: var(--gray-mid); transition: var(--transition); }
.footer-bottom a:hover { color: var(--red); }
.footer-bottom-links { display: flex; gap: 20px; flex-wrap: wrap; }
.social-links { display: flex; gap: 12px; }
.social-link {
    width: 36px; height: 36px; border-radius: 50%; background: var(--dark-card);
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition); color: var(--gray-light);
}
.social-link:hover { background: var(--red); color: var(--white); transform: scale(1.1); }

/* ===== Subpage Hero (for inner pages) ===== */
.subpage-hero {
    padding: 100px 0 50px; text-align: center;
    background: linear-gradient(160deg, #1a0a08, #1a1010);
}
.subpage-hero h1 { font-size: 2.4rem; font-weight: 900; margin-bottom: 8px; }
.subpage-hero .breadcrumb { font-size: 0.85rem; color: var(--gray-mid); }
.subpage-hero .breadcrumb a { color: var(--gray-mid); }
.subpage-hero .breadcrumb a:hover { color: var(--red); }

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px; width: 44px; height: 44px;
    border-radius: 50%; background: var(--red); color: var(--white); border: none;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transform: translateY(10px); transition: var(--transition);
    z-index: 999; box-shadow: 0 4px 16px rgba(230,57,32,0.4);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); background: var(--red-dark); }

/* ===== Animations ===== */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeInUp 0.6s ease forwards; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: repeat(3, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
    .about-layout { grid-template-columns: 1fr; }
    .factory-grid { grid-template-columns: repeat(2, 1fr); }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .section { padding: 60px 0; }
    .hero { min-height: 400px; }
    .hero h1 { font-size: 1.6rem; }
    .nav { position: fixed; top: 0; right: -100%; width: 280px; height: 100vh; background: rgba(17,17,17,0.98); backdrop-filter: blur(20px); padding: 80px 24px; flex-direction: column; align-items: flex-start; gap: 8px; transition: var(--transition); z-index: 1000; }
    .nav.active { right: 0; }
    .menu-toggle { display: flex; }
    .dropdown { opacity: 1; visibility: visible; transform: none; position: static; border: none; box-shadow: none; background: transparent; padding-left: 16px; }
    .category-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .factory-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .header-phone { display: none; }
}

@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero-buttons { flex-direction: column; align-items: center; }
    .footer-bottom { flex-direction: column; text-align: center; }
}