/* ===== 变量 & 重置 ===== */
:root {
    --primary: #FF4D00;
    --primary-dark: #D94000;
    --primary-light: #FF7A3D;
    --accent: #FFD600;
    --dark: #0A0A0A;
    --dark-2: #141414;
    --dark-3: #1E1E1E;
    --dark-4: #2A2A2A;
    --gray-1: #6B6B6B;
    --gray-2: #999;
    --gray-3: #F5F5F5;
    --white: #FFFFFF;
    --gradient-fire: linear-gradient(135deg, #FF4D00, #FFD600);
    --gradient-dark: linear-gradient(180deg, #0A0A0A, #141414);
    --shadow-glow: 0 0 40px rgba(255, 77, 0, 0.3);
    --radius: 12px;
    --radius-lg: 20px;
    --radius-pill: 50px;
    --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --font-display: 'Bebas Neue', 'Oswald', sans-serif;
    --font-heading: 'Oswald', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', -apple-system, sans-serif;
}

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

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

body {
    font-family: var(--font-body);
    color: var(--dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a { text-decoration: none; color: inherit; transition: var(--transition); }

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

/* ===== 预加载 ===== */
.preloader {
    position: fixed; inset: 0; z-index: 9999;
    background: var(--dark);
    display: flex; align-items: center; justify-content: center;
    transition: opacity 0.5s, visibility 0.5s;
}
.preloader.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.preloader-logo {
    font-family: var(--font-display);
    font-size: 3rem; color: var(--white); letter-spacing: 4px;
}
.preloader-logo span { color: var(--primary); }
.preloader-bar {
    width: 200px; height: 3px; background: var(--dark-3);
    border-radius: 3px; margin-top: 20px; overflow: hidden;
}
.preloader-progress {
    height: 100%; width: 0; background: var(--gradient-fire);
    border-radius: 3px; animation: preload 1.2s ease forwards;
}
@keyframes preload { to { width: 100%; } }

/* ===== 导航 ===== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 18px 0; transition: var(--transition);
}
.navbar.scrolled {
    background: rgba(10,10,10,0.92); backdrop-filter: blur(24px);
    padding: 12px 0; box-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.nav-container {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.logo { display: flex; align-items: center; gap: 2px; font-family: var(--font-display); font-size: 1.6rem; letter-spacing: 2px; }
.logo-main { color: var(--white); }
.logo-accent { color: var(--primary); }
.logo-paw { font-size: 1.2rem; margin-left: 6px; }
.nav-links { display: flex; list-style: none; gap: 6px; }
.nav-links a {
    color: rgba(255,255,255,0.65); padding: 8px 14px;
    border-radius: var(--radius-pill); font-size: 0.9rem;
    font-weight: 400; transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--white); background: rgba(255,255,255,0.08); }
.nav-right { display: flex; align-items: center; gap: 16px; }
.cart-btn {
    position: relative; background: none; border: none; cursor: pointer;
    width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
    border-radius: 50%; transition: var(--transition);
}
.cart-btn:hover { background: rgba(255,255,255,0.1); }
.cart-btn svg { width: 22px; height: 22px; color: var(--white); }
.cart-count {
    position: absolute; top: 2px; right: 2px;
    background: var(--primary); color: var(--white);
    font-size: 0.65rem; font-weight: 700;
    width: 18px; height: 18px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    transform: scale(0); transition: var(--transition);
}
.cart-count.show { transform: scale(1); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
.hamburger span { width: 24px; height: 2px; background: var(--white); border-radius: 2px; transition: var(--transition); }

/* ===== 购物车侧边栏 ===== */
.cart-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.5);
    z-index: 2000; opacity: 0; visibility: hidden; transition: var(--transition);
}
.cart-overlay.open { opacity: 1; visibility: visible; }
.cart-sidebar {
    position: fixed; top: 0; right: -420px; width: 400px; height: 100%;
    background: var(--white); z-index: 2001; transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex; flex-direction: column; box-shadow: -10px 0 40px rgba(0,0,0,0.15);
}
.cart-sidebar.open { right: 0; }
.cart-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 24px; border-bottom: 1px solid #eee;
}
.cart-header h3 { font-family: var(--font-heading); font-size: 1.3rem; }
.cart-close { background: none; border: none; font-size: 1.8rem; cursor: pointer; color: var(--gray-1); }
.cart-items { flex: 1; overflow-y: auto; padding: 16px 24px; }
.cart-empty { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; gap: 16px; }
.cart-empty svg { width: 80px; height: 80px; }
.cart-empty p { color: var(--gray-2); }
.cart-item {
    display: flex; gap: 16px; padding: 16px 0;
    border-bottom: 1px solid #f0f0f0; align-items: center;
}
.cart-item-img {
    width: 72px; height: 72px; border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.cart-item-img svg { width: 40px; height: 40px; opacity: 0.5; }
.cart-item-info { flex: 1; }
.cart-item-name { font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; }
.cart-item-price { color: var(--primary); font-weight: 700; font-size: 0.95rem; }
.cart-item-qty {
    display: flex; align-items: center; gap: 8px; margin-top: 8px;
}
.qty-btn {
    width: 28px; height: 28px; border: 1px solid #ddd; background: none;
    border-radius: 6px; cursor: pointer; font-size: 1rem;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}
.qty-btn:hover { border-color: var(--primary); color: var(--primary); }
.qty-num { font-weight: 600; font-size: 0.9rem; min-width: 20px; text-align: center; }
.cart-item-remove {
    background: none; border: none; color: var(--gray-2);
    cursor: pointer; font-size: 1.2rem; padding: 4px;
    transition: var(--transition);
}
.cart-item-remove:hover { color: #e74c3c; }
.cart-footer { padding: 20px 24px; border-top: 1px solid #eee; }
.cart-total { display: flex; justify-content: space-between; margin-bottom: 16px; font-size: 1.1rem; }
.cart-total-price { font-weight: 800; color: var(--primary); font-size: 1.3rem; }
.cart-checkout { font-size: 1rem; }

/* ===== Hero ===== */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; overflow: hidden;
    background: var(--dark);
}
.hero-bg-layers { position: absolute; inset: 0; }
.hero-gradient {
    position: absolute; inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(255,77,0,0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(255,214,0,0.06) 0%, transparent 50%),
        var(--gradient-dark);
}
.hero-grid-pattern {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}
.hero-noise {
    position: absolute; inset: 0; opacity: 0.03;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}
.hero-floating-boards { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.floating-board { position: absolute; opacity: 0.08; color: var(--white); }
.fb-1 { top: 15%; left: -5%; width: 300px; animation: floatBoard1 12s ease-in-out infinite; }
.fb-2 { top: 55%; right: -8%; width: 350px; animation: floatBoard2 15s ease-in-out infinite; }
.fb-3 { bottom: 10%; left: 20%; width: 250px; animation: floatBoard3 10s ease-in-out infinite; }
@keyframes floatBoard1 { 0%,100% { transform: translateY(0) rotate(-15deg); } 50% { transform: translateY(-30px) rotate(-10deg); } }
@keyframes floatBoard2 { 0%,100% { transform: translateY(0) rotate(20deg); } 50% { transform: translateY(25px) rotate(15deg); } }
@keyframes floatBoard3 { 0%,100% { transform: translateY(0) rotate(-5deg); } 50% { transform: translateY(-20px) rotate(0deg); } }

.hero-content { position: relative; z-index: 2; padding: 0 24px; max-width: 1200px; margin: 0 auto; width: 100%; }
.hero-badge {
    display: inline-block; font-family: var(--font-heading);
    font-size: 0.85rem; color: var(--primary); letter-spacing: 4px;
    border: 1px solid rgba(255,77,0,0.3); padding: 6px 20px;
    border-radius: var(--radius-pill); margin-bottom: 28px;
}
.hero-title { margin-bottom: 28px; line-height: 0.95; }
.hero-line-1, .hero-line-2, .hero-line-3 {
    display: block; font-family: var(--font-display);
    font-size: clamp(4rem, 12vw, 9rem); color: var(--white);
    letter-spacing: 6px;
}
.hero-line-2 { color: rgba(255,255,255,0.3); }
.hero-line-3 { color: var(--white); }
.title-dot { color: var(--primary); }
.hero-subtitle {
    font-size: clamp(0.95rem, 1.8vw, 1.15rem);
    color: var(--gray-2); max-width: 480px;
    margin-bottom: 40px; font-weight: 300; line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; align-items: center; }

.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 14px 32px; border-radius: var(--radius-pill);
    font-size: 0.95rem; font-weight: 600; cursor: pointer;
    border: none; transition: var(--transition); font-family: var(--font-body);
    gap: 8px;
}
.btn-lg { padding: 16px 40px; font-size: 1rem; }
.btn-sm { padding: 10px 24px; font-size: 0.85rem; }
.btn-primary {
    background: var(--gradient-fire); color: var(--white);
    box-shadow: 0 4px 20px rgba(255,77,0,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow); }
.btn-ghost { background: none; color: var(--white); padding-left: 0; }
.btn-ghost:hover { color: var(--primary); }
.btn-outline-light { background: none; color: var(--white); border: 1.5px solid rgba(255,255,255,0.4); }
.btn-outline-light:hover { background: var(--white); color: var(--dark); }
.btn-full { width: 100%; }
.play-icon {
    width: 36px; height: 36px; border-radius: 50%;
    border: 1.5px solid rgba(255,255,255,0.4);
    display: flex; align-items: center; justify-content: center;
    font-size: 0.7rem;
}

.hero-scroll {
    position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 10px;
    color: var(--gray-1); font-family: var(--font-heading);
    font-size: 0.75rem; letter-spacing: 3px;
}
.scroll-line { width: 1px; height: 50px; background: linear-gradient(to bottom, var(--primary), transparent); animation: scrollPulse 2s infinite; }
@keyframes scrollPulse { 0%,100% { opacity: 1; } 50% { opacity: 0.3; } }

/* ===== Marquee ===== */
.marquee-bar {
    background: var(--primary); padding: 14px 0; overflow: hidden;
    white-space: nowrap;
}
.marquee-track {
    display: inline-flex; gap: 40px;
    animation: marquee 20s linear infinite;
    font-family: var(--font-display); font-size: 1.1rem;
    color: var(--white); letter-spacing: 3px;
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ===== Section 通用 ===== */
.section-header { text-align: center; margin-bottom: 56px; }
.section-header.light .section-title, .section-header.light .section-desc { color: var(--white); }
.section-tag {
    display: inline-block; font-family: var(--font-heading);
    font-size: 0.8rem; font-weight: 600; color: var(--primary);
    letter-spacing: 4px; margin-bottom: 10px;
}
.section-title {
    font-family: var(--font-heading); font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 700; color: var(--dark); margin-bottom: 12px; letter-spacing: 1px;
}
.section-title.left { text-align: left; }
.section-desc { font-size: 1rem; color: var(--gray-1); max-width: 460px; margin: 0 auto; }

/* ===== 产品商城 ===== */
.products { padding: 100px 0; background: var(--gray-3); }
.product-filters { display: flex; gap: 10px; justify-content: center; margin-bottom: 44px; flex-wrap: wrap; }
.filter-btn {
    padding: 10px 24px; border: 1.5px solid #ddd; background: var(--white);
    border-radius: var(--radius-pill); font-size: 0.88rem; cursor: pointer;
    transition: var(--transition); font-family: var(--font-body);
    color: var(--gray-1); font-weight: 500;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--dark); color: var(--white); border-color: var(--dark); }

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

.product-card {
    background: var(--white); border-radius: var(--radius-lg);
    overflow: hidden; transition: var(--transition);
    box-shadow: 0 2px 10px rgba(0,0,0,0.04);
    position: relative;
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.1); }
.product-card.hidden { display: none; }
.product-badge {
    position: absolute; top: 16px; left: 16px; z-index: 5;
    background: var(--primary); color: var(--white);
    font-size: 0.72rem; font-weight: 700; padding: 4px 12px;
    border-radius: var(--radius-pill); letter-spacing: 0.5px;
}
.product-image {
    position: relative; height: 240px;
    display: flex; align-items: center; justify-content: center;
    overflow: hidden;
}
.product-image svg {
    width: 120px; height: 50px; opacity: 0.35;
    transition: var(--transition);
}
.product-card:hover .product-image svg { opacity: 0.6; transform: scale(1.1) rotate(-3deg); }
.product-body { padding: 20px; }
.product-category { font-size: 0.72rem; color: var(--gray-2); text-transform: uppercase; letter-spacing: 1.5px; font-weight: 600; margin-bottom: 6px; }
.product-name { font-family: var(--font-heading); font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; color: var(--dark); }
.product-desc { font-size: 0.82rem; color: var(--gray-1); margin-bottom: 16px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-footer { display: flex; align-items: center; justify-content: space-between; }
.product-price { font-family: var(--font-heading); font-size: 1.2rem; font-weight: 700; color: var(--primary); }
.product-price .original { font-size: 0.82rem; color: var(--gray-2); text-decoration: line-through; margin-left: 6px; font-weight: 400; }
.add-to-cart {
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--dark); color: var(--white); border: none;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    transition: var(--transition); font-size: 1.2rem;
}
.add-to-cart:hover { background: var(--primary); transform: scale(1.1); }
.add-to-cart.added { background: #22c55e; }

/* ===== 系列 ===== */
.series { padding: 100px 0; background: var(--white); }
.series-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.series-card {
    position: relative; border-radius: var(--radius-lg); overflow: hidden;
    min-height: 280px; display: flex; align-items: flex-end;
    transition: var(--transition); cursor: pointer;
}
.series-card:hover { transform: translateY(-4px); }
.series-large { grid-column: 1 / -1; min-height: 380px; }
.series-bg { position: absolute; inset: 0; transition: var(--transition); }
.series-card:hover .series-bg { transform: scale(1.03); }
.series-content { position: relative; z-index: 2; padding: 36px; color: var(--white); }
.series-label {
    display: inline-block; font-family: var(--font-heading);
    font-size: 0.75rem; letter-spacing: 3px; color: var(--accent);
    margin-bottom: 10px; font-weight: 600;
}
.series-content h3 { font-family: var(--font-display); font-size: 2rem; letter-spacing: 3px; margin-bottom: 10px; }
.series-large .series-content h3 { font-size: 2.8rem; }
.series-content p { font-size: 0.9rem; color: rgba(255,255,255,0.75); margin-bottom: 20px; max-width: 400px; line-height: 1.6; }
.series-visual {
    position: absolute; right: 60px; top: 50%; transform: translateY(-50%);
    opacity: 0.15; color: var(--white);
}
.board-svg-lg { width: 350px; }

/* ===== 文化 ===== */
.culture { position: relative; padding: 100px 0; overflow: hidden; }
.culture-bg {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, #0A0A0A 0%, #1a1a2e 50%, #16213e 100%);
}
.culture-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; z-index: 2; }
.culture-card {
    padding: 36px 28px; border-radius: var(--radius-lg);
    background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.06);
    backdrop-filter: blur(10px); transition: var(--transition);
}
.culture-card:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,77,0,0.3); transform: translateY(-4px); }
.culture-number { font-family: var(--font-display); font-size: 2.5rem; color: var(--primary); opacity: 0.6; margin-bottom: 12px; }
.culture-card h3 { font-family: var(--font-heading); font-size: 1.15rem; color: var(--white); margin-bottom: 12px; letter-spacing: 0.5px; }
.culture-card p { font-size: 0.88rem; color: rgba(255,255,255,0.55); line-height: 1.7; }

/* ===== 评价 ===== */
.reviews { padding: 100px 0; background: var(--gray-3); }
.reviews-track { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.review-card {
    background: var(--white); padding: 32px; border-radius: var(--radius-lg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.04); transition: var(--transition);
}
.review-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(0,0,0,0.08); }
.review-stars { color: var(--accent); font-size: 0.9rem; margin-bottom: 16px; letter-spacing: 2px; }
.review-card p { font-size: 0.9rem; color: var(--dark-3); line-height: 1.7; margin-bottom: 20px; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
    width: 40px; height: 40px; border-radius: 50%;
    background: var(--dark); color: var(--white);
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.85rem;
}
.review-author strong { display: block; font-size: 0.88rem; }
.review-author span { font-size: 0.78rem; color: var(--gray-2); }

/* ===== 关于 ===== */
.about { padding: 100px 0; background: var(--white); }
.about-layout { display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center; }
.about-left .section-tag { text-align: left; display: block; }
.about-text p { font-size: 0.95rem; color: #4a5568; line-height: 1.8; margin-bottom: 14px; }
.about-text strong { color: var(--dark); }
.about-stats { display: flex; gap: 36px; margin-top: 32px; }
.about-stat { text-align: center; }
.about-stat-num { display: block; font-family: var(--font-display); font-size: 2rem; color: var(--primary); letter-spacing: 1px; }
.about-stat-label { font-size: 0.82rem; color: var(--gray-1); }
.about-visual { display: flex; align-items: center; justify-content: center; }
.about-card-stack { display: flex; flex-direction: column; gap: 16px; width: 100%; }
.about-card-item {
    padding: 28px 32px; border-radius: var(--radius); transition: var(--transition);
    border: 1px solid #eee;
}
.aci-1 { background: linear-gradient(135deg, #0A0A0A, #1E1E1E); color: var(--white); border: none; }
.aci-2 { background: var(--gray-3); }
.aci-3 { background: var(--white); }
.about-card-item:hover { transform: translateX(8px); }
.aci-label { font-size: 0.75rem; color: var(--primary); font-weight: 600; letter-spacing: 1px; margin-bottom: 8px; text-transform: uppercase; }
.aci-1 .aci-label { color: var(--accent); }
.aci-text { font-family: var(--font-heading); font-size: 1.15rem; font-weight: 600; letter-spacing: 0.5px; }
.aci-1 .aci-text { color: var(--white); }

/* ===== 联系 ===== */
.contact { padding: 100px 0; background: var(--gray-3); }
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; }
.contact-form { display: flex; flex-direction: column; gap: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 0.82rem; font-weight: 600; color: var(--dark-3); }
.form-group input, .form-group select, .form-group textarea {
    padding: 13px 16px; border: 1.5px solid #e0e0e0; border-radius: var(--radius);
    font-size: 0.92rem; font-family: var(--font-body); color: var(--dark);
    transition: var(--transition); background: var(--white); outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--primary); box-shadow: 0 0 0 3px rgba(255,77,0,0.08);
}
.form-group textarea { resize: vertical; }

.contact-info {
    background: var(--dark); border-radius: var(--radius-lg);
    padding: 40px; display: flex; flex-direction: column; gap: 32px;
}
.contact-brand-name { font-family: var(--font-display); font-size: 2rem; color: var(--white); letter-spacing: 3px; }
.contact-brand-name span { color: var(--primary); }
.contact-brand p { color: var(--gray-2); font-size: 0.88rem; margin-top: 6px; }
.contact-details { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; }
.contact-item svg { width: 22px; height: 22px; color: var(--primary); flex-shrink: 0; margin-top: 2px; }
.contact-item h4 { font-size: 0.88rem; color: var(--white); margin-bottom: 2px; }
.contact-item p { font-size: 0.85rem; color: var(--gray-2); }
.contact-socials { display: flex; gap: 10px; margin-top: 8px; }
.social-link {
    padding: 8px 18px; border: 1px solid var(--dark-4); border-radius: var(--radius-pill);
    color: var(--gray-2); font-size: 0.82rem; transition: var(--transition);
}
.social-link:hover { border-color: var(--primary); color: var(--primary); }

/* ===== 页脚 ===== */
.footer { background: var(--dark); padding: 60px 0 0; color: var(--gray-2); }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid var(--dark-3); }
.footer-logo { font-family: var(--font-display); font-size: 1.8rem; color: var(--white); letter-spacing: 3px; margin-bottom: 10px; }
.footer-logo span { color: var(--primary); }
.footer-brand p { font-size: 0.88rem; color: var(--gray-1); line-height: 1.6; }
.footer-company { font-size: 0.8rem !important; color: var(--gray-2) !important; margin-top: 8px; opacity: 0.6; }
.footer-col h4 { color: var(--white); font-family: var(--font-heading); font-size: 0.95rem; margin-bottom: 16px; letter-spacing: 1px; }
.footer-col a { display: block; font-size: 0.85rem; color: var(--gray-1); padding: 4px 0; transition: var(--transition); }
.footer-col a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom { padding: 20px 0; text-align: center; font-size: 0.78rem; color: var(--gray-1); opacity: 0.5; }

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px; z-index: 999;
    width: 48px; height: 48px; border-radius: 50%;
    background: var(--dark); color: var(--white); border: none;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: var(--transition);
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--primary); }
.back-to-top svg { width: 20px; height: 20px; }

/* ===== 动画 ===== */
.fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .culture-grid { grid-template-columns: repeat(2, 1fr); }
    .reviews-track { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; position: absolute; top: 100%; left: 0; right: 0;
        background: rgba(10,10,10,0.98); flex-direction: column; padding: 16px; gap: 4px;
    }
    .nav-links.open { display: flex; }
    .hamburger { display: flex; }
    .hero-line-1, .hero-line-2, .hero-line-3 { letter-spacing: 3px; }
    .hero-actions { flex-direction: column; align-items: flex-start; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .series-grid { grid-template-columns: 1fr; }
    .series-large { min-height: 300px; }
    .series-visual { display: none; }
    .culture-grid { grid-template-columns: 1fr; }
    .reviews-track { grid-template-columns: 1fr; }
    .about-layout { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .cart-sidebar { width: 100%; right: -100%; }
    .about-stats { gap: 20px; }
}

@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero-badge { font-size: 0.72rem; padding: 5px 14px; }
}