/* ============================================
   Lock & Load Fluid Technology
   International Business Website
   ============================================ */

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

:root {
    /* Colors - Industrial Dark Theme */
    --bg-primary: #0a0f1a;
    --bg-secondary: #0f1623;
    --bg-card: #141d2e;
    --bg-card-hover: #1a2438;
    --bg-elevated: #1e2940;
    --border: rgba(255,255,255,0.08);
    --border-hover: rgba(245,158,11,0.3);

    --text-primary: #e8ecf1;
    --text-secondary: #a0aec0;
    --text-muted: #6b7c93;

    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --accent-dark: #d97706;
    --accent-glow: rgba(245,158,11,0.15);

    --blue: #3b82f6;
    --blue-light: #60a5fa;
    --blue-dark: #2563eb;

    --grad-accent: linear-gradient(135deg, #f59e0b, #d97706);
    --grad-blue: linear-gradient(135deg, #3b82f6, #1e40af);
    --grad-dark: linear-gradient(180deg, #0a0f1a, #0f1623);

    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 20px;

    --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.5);
    --shadow-glow: 0 0 40px rgba(245,158,11,0.15);

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

    --font-en: 'Inter', sans-serif;
    --font-cn: 'Noto Sans SC', sans-serif;
}

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

body {
    font-family: var(--font-en);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

body[data-lang="zh"] { font-family: var(--font-cn); }

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

.amp { color: var(--accent); font-weight: 700; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ===== Loader ===== */
.loader {
    position: fixed; inset: 0; z-index: 9999;
    background: var(--bg-primary);
    display: flex; align-items: center; justify-content: center;
    transition: opacity 0.6s, visibility 0.6s;
}
.loader.hidden { opacity: 0; visibility: hidden; }
.loader-content { text-align: center; }
.loader-logo { margin-bottom: 30px; display: flex; justify-content: center; }
.loader-logo-img { height: 100px; width: auto; object-fit: contain; }
.loader-bar {
    width: 200px; height: 2px; background: rgba(255,255,255,0.1);
    border-radius: 2px; overflow: hidden; margin: 0 auto 16px;
}
.loader-bar-fill {
    height: 100%; width: 0; background: var(--grad-accent);
    animation: loadFill 1.5s ease-out forwards;
}
@keyframes loadFill { to { width: 100%; } }
.loader-subtitle { color: var(--text-muted); font-size: 0.85rem; letter-spacing: 2px; }

/* ===== Navbar ===== */
.navbar {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}
.navbar.scrolled {
    background: rgba(10,15,26,0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}
.nav-container {
    max-width: 1280px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; color: var(--text-primary); background: #fff; padding: 0; border-radius: 4px; }
.nav-logo-img { height: 80px; width: auto; object-fit: contain; }

.nav-menu { display: flex; list-style: none; gap: 32px; }
.nav-menu a {
    font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
    position: relative; transition: var(--transition); padding: 4px 0;
}
.nav-menu a::after {
    content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px;
    background: var(--accent); transition: var(--transition);
}
.nav-menu a:hover { color: var(--text-primary); }
.nav-menu a:hover::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: 16px; }
.lang-toggle { display: flex; gap: 2px; background: rgba(255,255,255,0.05); border-radius: 8px; padding: 3px; }
.lang-btn {
    padding: 5px 12px; font-size: 0.8rem; font-weight: 600;
    border-radius: 6px; color: var(--text-muted); transition: var(--transition);
}
.lang-btn.active { background: var(--accent); color: #1a1a1a; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Buttons ===== */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 14px 32px; font-size: 0.95rem; font-weight: 600;
    border-radius: var(--radius-sm); transition: var(--transition);
    cursor: pointer; border: 2px solid transparent;
}
.btn-primary {
    background: var(--grad-accent); color: #1a1a1a;
    box-shadow: 0 4px 20px rgba(245,158,11,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 30px rgba(245,158,11,0.5); }
.btn-outline {
    background: transparent; color: var(--text-primary);
    border-color: var(--border);
}
.btn-outline:hover { border-color: var(--accent); background: var(--accent-glow); }
.btn-full { width: 100%; }

/* ===== Hero ===== */
.hero {
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden; padding: 120px 24px 80px;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(245,158,11,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(245,158,11,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}
.hero-glow {
    position: absolute; width: 800px; height: 800px;
    top: 50%; left: 50%; transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(245,158,11,0.08) 0%, transparent 60%);
    border-radius: 50%;
}
.hero-particles { position: absolute; inset: 0; }
.particle {
    position: absolute; width: 3px; height: 3px;
    background: var(--accent); border-radius: 50%;
    box-shadow: 0 0 6px var(--accent);
    opacity: 0.3; animation: floatUp 15s linear infinite;
}
@keyframes floatUp {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 0.55; }
    90% { opacity: 0.55; }
    100% { transform: translateY(-100px) scale(1); opacity: 0; }
}

/* ===== Global Particle Background (site-wide) ===== */
.global-particles { position: fixed; inset: 0; z-index: 0; pointer-events: none; overflow: hidden; }
.global-particles .particle {
    background: var(--accent); border-radius: 50%;
    box-shadow: 0 0 8px var(--accent);
    opacity: 0.18; animation: floatUpGlobal 22s linear infinite;
}
@keyframes floatUpGlobal {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 0.5; }
    90% { opacity: 0.5; }
    100% { transform: translateY(-100px) scale(1); opacity: 0; }
}

.hero-content { position: relative; z-index: 1; text-align: center; max-width: 900px; }
.hero-badge {
    display: inline-block; padding: 6px 20px;
    background: rgba(245,158,11,0.1); border: 1px solid rgba(245,158,11,0.3);
    border-radius: 100px; font-size: 0.8rem; font-weight: 600;
    color: var(--accent); letter-spacing: 2px; margin-bottom: 28px;
}
.hero-title { margin-bottom: 8px; }
.hero-brand {
    font-size: clamp(3rem, 10vw, 6rem); font-weight: 900;
    letter-spacing: -3px; line-height: 1;
    background: linear-gradient(135deg, #e8ecf1 0%, #a0aec0 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-cn-name {
    font-family: var(--font-cn); font-size: clamp(2rem, 6vw, 4rem); color: var(--text-muted);
    margin-bottom: 20px; letter-spacing: 1px; font-weight: 900;
}
.hero-tagline {
    font-size: clamp(1.3rem, 4vw, 2rem); font-weight: 700;
    color: var(--text-primary); margin-bottom: 24px;
    display: flex; align-items: center; justify-content: center; gap: 12px;
}
.hero-dot { color: var(--accent); }
.hero-desc {
    font-size: 0.95rem; color: var(--text-secondary);
    max-width: 1200px; margin: 0 auto 40px; line-height: 1.7;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.hero-cta { display: flex; gap: 16px; justify-content: center; margin-bottom: 60px; flex-wrap: wrap; }

.hero-stats {
    display: flex; align-items: center; justify-content: center; gap: 40px;
    padding: 28px 40px; background: rgba(20,29,46,0.6);
    backdrop-filter: blur(10px); border: 1px solid var(--border);
    border-radius: var(--radius); max-width: fit-content; margin: 0 auto;
}
.hero-stat { text-align: center; }
.stat-num { font-size: 2.5rem; font-weight: 900; color: var(--accent); line-height: 1; }
.stat-suffix { font-size: 2.5rem; font-weight: 900; color: var(--accent); }
.stat-label { font-size: 0.8rem; color: var(--text-muted); margin-top: 6px; letter-spacing: 0.5px; }
.hero-stat-divider { width: 1px; height: 50px; background: var(--border); }

.hero-scroll {
    position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    color: var(--text-muted); font-size: 0.75rem; letter-spacing: 2px; text-transform: uppercase;
}
.scroll-line { width: 1px; height: 40px; background: linear-gradient(to bottom, var(--accent), transparent); animation: scrollDown 2s ease-in-out infinite; }
@keyframes scrollDown { 0%, 100% { transform: scaleY(0.3); transform-origin: top; } 50% { transform: scaleY(1); transform-origin: top; } }

/* ===== Sections ===== */
.section { padding: 100px 0; position: relative; z-index: 1; }
.section:nth-child(even) { background: rgba(15,22,35,0.82); }

.section-header { text-align: center; margin-bottom: 60px; }
.section-num {
    display: block; font-size: 0.85rem; font-weight: 700; color: var(--accent);
    letter-spacing: 4px; margin-bottom: 12px;
}
.section-title { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; letter-spacing: -1px; }
.section-subtitle { font-size: 1rem; color: var(--text-muted); margin-top: 8px; }

/* ===== About ===== */
.about-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 50px; margin-bottom: 60px; }
.about-text p { font-size: 1.05rem; color: var(--text-secondary); margin-bottom: 20px; line-height: 1.8; }

.about-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.info-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 24px; transition: var(--transition);
}
.info-card:hover { background: var(--bg-card-hover); border-color: var(--border-hover); transform: translateY(-4px); }
.info-card-icon { color: var(--accent); margin-bottom: 16px; }
.info-card-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 6px; }
.info-card-value { font-size: 1.3rem; font-weight: 700; color: var(--text-primary); }

/* ===== Business Scope ===== */
.business-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.biz-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 32px; transition: var(--transition);
    position: relative; overflow: hidden;
}
.biz-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: var(--grad-accent); transform: scaleX(0); transform-origin: left; transition: var(--transition);
}
.biz-card:hover { background: var(--bg-card-hover); border-color: var(--border-hover); transform: translateY(-6px); box-shadow: var(--shadow-md); }
.biz-card:hover::before { transform: scaleX(1); }
.biz-card-num { font-size: 0.85rem; font-weight: 800; color: var(--accent); margin-bottom: 16px; letter-spacing: 2px; }
.biz-card-icon { color: var(--accent); margin-bottom: 20px; opacity: 0.8; }
.biz-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 12px; color: var(--text-primary); }
.biz-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== Global Services ===== */
.global-stats {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
    margin-bottom: 60px;
}
.global-stat-item {
    text-align: center; padding: 36px 20px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); transition: var(--transition);
}
.global-stat-item:hover { border-color: var(--border-hover); transform: translateY(-4px); }
.global-stat-num { font-size: 3rem; font-weight: 900; color: var(--accent); line-height: 1; }
.global-stat-num span { font-size: 2rem; }
.global-stat-label { font-size: 0.9rem; color: var(--text-muted); margin-top: 10px; }

.global-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-bottom: 60px; }
.feature-card {
    display: flex; gap: 20px; padding: 28px;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); transition: var(--transition);
}
.feature-card:hover { background: var(--bg-card-hover); border-color: var(--border-hover); }
.feature-icon { color: var(--accent); flex-shrink: 0; }
.feature-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.feature-card p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.6; }

/* World Map */
.world-map-section { text-align: center; }
.world-map-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 20px; color: var(--text-secondary); }
.world-map { max-width: 900px; margin: 0 auto; }
.map-svg { width: 100%; height: auto; }

/* ===== Culture ===== */
.culture-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.culture-card {
    display: flex; gap: 24px; align-items: flex-start;
    padding: 36px; background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); transition: var(--transition);
}
.culture-card:hover { background: var(--bg-card-hover); border-color: var(--border-hover); transform: translateY(-4px); }
.culture-char {
    font-size: 3rem; font-weight: 900; color: var(--accent);
    font-family: var(--font-cn); line-height: 1;
    background: rgba(245,158,11,0.1); width: 80px; height: 80px;
    display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius); flex-shrink: 0;
}
.culture-content h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
.culture-content p { font-size: 0.9rem; color: var(--text-secondary); line-height: 1.7; }

/* ===== Partners ===== */
.partners-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.partner-card {
    padding: 36px; background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); transition: var(--transition); text-align: center;
}
.partner-card:hover { background: var(--bg-card-hover); border-color: var(--border-hover); transform: translateY(-6px); box-shadow: var(--shadow-md); }
.partner-link { display: inline-block; margin-top: 12px; font-size: 0.8rem; color: var(--accent); text-decoration: none; font-weight: 600; transition: var(--transition); }
.partner-link:hover { color: var(--accent-bright); text-decoration: underline; }
.partner-logo { display: flex; align-items: center; justify-content: center; height: 80px; margin-bottom: 24px; padding: 8px 12px; background: #ffffff; border-radius: var(--radius-sm); }
.partner-logo img { max-width: 100%; max-height: 100%; width: auto; height: auto; object-fit: contain; filter: contrast(1.05); }
.partner-logo-feejoy img { margin-top: 24px; }
.partner-desc { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 20px; line-height: 1.7; }
.partner-products {
    display: inline-block; padding: 6px 16px;
    background: var(--accent-glow); border: 1px solid rgba(245,158,11,0.2);
    border-radius: 100px; font-size: 0.8rem; color: var(--accent); font-weight: 600;
}

/* ===== Products ===== */
.product-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 40px; flex-wrap: wrap; }
.product-tab {
    padding: 12px 28px; font-size: 0.95rem; font-weight: 600;
    border-radius: var(--radius-sm); color: var(--text-muted);
    border: 1px solid var(--border); transition: var(--transition);
}
.product-tab:hover { color: var(--text-primary); border-color: var(--border-hover); }
.product-tab.active { background: var(--accent); color: #1a1a1a; border-color: var(--accent); }

.product-panel { display: none; animation: fadeIn 0.4s ease; }
.product-panel.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.product-panel-header { margin-bottom: 32px; }
.product-panel-header h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 8px; }
.product-panel-header h3 span { font-size: 0.9rem; font-weight: 400; color: var(--text-muted); }
.product-panel-header p { font-size: 0.95rem; color: var(--text-secondary); }

/* ===== Featured Product Highlight ===== */
.featured-product {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    margin-bottom: 32px;
}
.featured-product-content { display: flex; flex-direction: column; gap: 12px; }
.featured-label {
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent);
    text-transform: uppercase;
}
.featured-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    margin: 0;
}
.featured-subtitle {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-muted);
    margin: 0;
}
.featured-desc {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--text-muted);
    margin: 8px 0 16px 0;
}
.featured-product-image {
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--bg-elevated);
    border-radius: var(--radius);
    padding: 20px;
    min-height: 280px;
}
.featured-product-image img {
    max-width: 100%;
    max-height: 320px;
    object-fit: contain;
}

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.product-card {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); overflow: hidden; transition: var(--transition);
}
.product-card:hover { border-color: var(--border-hover); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.product-img { aspect-ratio: 4/3; overflow: hidden; background: var(--bg-elevated); }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition-slow); }
.product-card:hover .product-img img { transform: scale(1.05); }
.product-info { padding: 18px; }
.product-code { font-size: 0.7rem; color: var(--accent); font-weight: 600; letter-spacing: 1px; display: block; margin-bottom: 6px; }
.product-info h4 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
.product-info p { font-size: 0.8rem; color: var(--text-muted); }

/* ===== Industries ===== */
.industries-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.industry-card {
    padding: 36px; text-align: center;
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); transition: var(--transition);
    position: relative; overflow: hidden;
}
.industry-card::after {
    content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 0;
    background: var(--grad-accent); transition: var(--transition); opacity: 0.1;
}
.industry-card:hover { border-color: var(--border-hover); transform: translateY(-6px); }
.industry-card:hover::after { height: 100%; }
.industry-char {
    font-size: 2.5rem; font-weight: 900; color: var(--accent);
    font-family: var(--font-cn); margin-bottom: 16px;
    width: 70px; height: 70px; margin: 0 auto 16px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(245,158,11,0.1); border-radius: 50%;
}
.industry-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; position: relative; z-index: 1; }
.industry-card p { font-size: 0.85rem; color: var(--text-secondary); position: relative; z-index: 1; }

/* ===== Contact ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon {
    width: 48px; height: 48px; border-radius: var(--radius-sm);
    background: var(--accent-glow); color: var(--accent);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.contact-label { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }
.contact-value { font-size: 1rem; color: var(--text-primary); font-weight: 500; }
.contact-value a:hover { color: var(--accent); }
.contact-value-cn { font-size: 0.85rem; color: var(--text-muted); font-family: var(--font-cn); margin-top: 2px; }

.contact-form-wrapper {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 36px;
}
.contact-form h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.85rem; color: var(--text-secondary); margin-bottom: 8px; font-weight: 500; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 12px 16px; font-size: 0.95rem;
    background: var(--bg-elevated); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-primary); transition: var(--transition);
    font-family: inherit;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group textarea { resize: vertical; }
.form-success {
    display: none; margin-top: 16px; padding: 14px 20px;
    background: rgba(34,197,94,0.1); border: 1px solid rgba(34,197,94,0.3);
    border-radius: var(--radius-sm); color: #4ade80; font-size: 0.9rem;
}
.form-success.show { display: block; }

/* ===== Footer ===== */
.footer { background: rgba(15,22,35,0.82); border-top: 1px solid var(--border); padding: 60px 0 30px; position: relative; z-index: 1; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .footer-logo { margin-bottom: 8px; }
.footer-logo-img { height: 60px; width: auto; object-fit: contain; }
.footer-cn { font-family: var(--font-cn); font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 12px; }
.footer-tagline { font-size: 0.85rem; color: var(--text-muted); }
.footer-tagline-cn { font-family: var(--font-cn); font-size: 0.85rem; color: var(--text-muted); margin-top: 4px; }
.footer-links h4, .footer-contact h4 { font-size: 0.85rem; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
.footer-links a, .footer-contact p { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 10px; transition: var(--transition); }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { padding-top: 30px; border-top: 1px solid var(--border); text-align: center; }
.footer-bottom p { font-size: 0.8rem; color: var(--text-muted); }
.footer-taxid { margin-top: 6px; }

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px; z-index: 999;
    width: 48px; height: 48px; border-radius: 50%;
    background: var(--accent); color: #1a1a1a;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden; transform: translateY(20px);
    transition: var(--transition); box-shadow: var(--shadow-md);
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 6px 30px rgba(245,158,11,0.4); }

/* ===== Scroll Animations ===== */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== Contact New Layout ===== */
.contact-item--full { grid-column: 1 / -1; }
.contact-value--multi { display: flex; flex-direction: column; gap: 4px; }
.contact-line { display: block; font-size: 0.95rem; }
.contact-line strong { color: var(--accent); font-weight: 700; margin-right: 4px; }
.contact-line-sep { color: var(--text-muted); margin: 0 4px; }
.contact-icon--sh { color: #ef4444 !important; background: rgba(239,68,68,0.1) !important; }
.contact-icon--hk { color: #60a5fa !important; background: rgba(96,165,250,0.1) !important; }
.contact-item--full .contact-icon { align-self: flex-start; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; }
    .business-grid, .culture-grid, .partners-grid, .industries-grid { grid-template-columns: repeat(2, 1fr); }
    .partners-grid { grid-template-columns: repeat(2, 1fr); }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .featured-product { grid-template-columns: 1fr; gap: 24px; padding: 28px; }
    .featured-product-image { order: -1; }
    .global-stats { grid-template-columns: repeat(2, 1fr); }
    .global-features { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed; top: 70px; left: 0; right: 0;
        background: var(--bg-primary); border-bottom: 1px solid var(--border);
        flex-direction: column; padding: 20px; gap: 16px;
        transform: translateY(-150%); transition: var(--transition);
    }
    .nav-menu.active { transform: translateY(0); }
    .nav-toggle { display: flex; }

    .section { padding: 70px 0; }
    .business-grid, .culture-grid, .partners-grid, .industries-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .global-stats { grid-template-columns: 1fr 1fr; gap: 16px; }
    .global-stat-item { padding: 24px 16px; }
    .global-stat-num { font-size: 2.2rem; }

    .hero-stats { flex-direction: column; gap: 20px; padding: 24px; }
    .hero-stat-divider { width: 60px; height: 1px; }

    .about-cards { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .culture-card { flex-direction: column; text-align: center; }
    .culture-char { margin: 0 auto; }
    .hero-desc { white-space: normal; font-size: 0.85rem; }
}

@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .hero-cta { flex-direction: column; width: 100%; }
    .hero-cta .btn { width: 100%; }
    .global-stats { grid-template-columns: 1fr; }
}