/* ===== CSS Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    color: #333; line-height: 1.6; background: #fff;
}
a { text-decoration: none; color: inherit; transition: color 0.3s; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== Header / Navigation ===== */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: rgba(255,255,255,0.97); backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.08); transition: all 0.3s;
}
.header .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { font-size: 1.2rem; font-weight: 700; color: #1a5276; white-space: nowrap; }
.logo span { color: #e67e22; }
.nav { display: flex; gap: 8px; }
.nav a {
    padding: 8px 16px; border-radius: 6px; font-size: 0.95rem; font-weight: 500;
    color: #555; transition: all 0.3s;
}
.nav a:hover, .nav a.active { color: #1a5276; background: #eaf2f8; }
.nav-cta {
    background: #e67e22 !important; color: #fff !important; padding: 10px 24px !important;
    border-radius: 25px !important; font-weight: 600 !important;
}

/* Language Switcher */
.lang-switcher { margin-left: 12px; }
.lang-switcher select {
    padding: 6px 10px; border: 1px solid #ddd; border-radius: 6px;
    font-size: 0.85rem; color: #555; background: #fff; cursor: pointer;
    outline: none; transition: border-color 0.3s;
}
.lang-switcher select:hover { border-color: #e67e22; }
.nav-cta:hover { background: #d35400 !important; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; }
.hamburger span { width: 24px; height: 2px; background: #333; transition: all 0.3s; }

/* ===== Hero Section ===== */
.hero {
    position: relative; height: 100vh; min-height: 600px; overflow: hidden;
}
.hero-slider { position: absolute; inset: 0; }
.hero-slide {
    position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease;
    background-size: cover; background-position: center;
}
.hero-slide.active { opacity: 1; }
.hero-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(26,82,118,0.75) 0%, rgba(0,0,0,0.4) 100%);
}
.hero-content {
    position: relative; z-index: 2; height: 100%;
    display: flex; flex-direction: column; justify-content: center; align-items: center;
    text-align: center; color: #fff; padding: 0 20px;
}
.hero-content h1 { font-size: 3.5rem; font-weight: 800; margin-bottom: 16px; text-shadow: 0 2px 10px rgba(0,0,0,0.3); }
.hero-content p { font-size: 1.3rem; margin-bottom: 36px; opacity: 0.95; max-width: 600px; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.btn {
    display: inline-block; padding: 14px 36px; border-radius: 30px;
    font-size: 1rem; font-weight: 600; transition: all 0.3s; cursor: pointer; border: none;
}
.btn-primary { background: #e67e22; color: #fff; }
.btn-primary:hover { background: #d35400; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(230,126,34,0.4); }
.btn-outline { background: transparent; color: #fff; border: 2px solid #fff; }
.btn-outline:hover { background: #fff; color: #1a5276; }
.hero-dots {
    position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
    display: flex; gap: 10px; z-index: 3;
}
.hero-dot {
    width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,0.5);
    cursor: pointer; transition: all 0.3s;
}
.hero-dot.active { background: #fff; transform: scale(1.2); }

/* ===== Section Styles ===== */
.section { padding: 80px 0; }
.section-alt { background: #f8f9fa; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 { font-size: 2.2rem; font-weight: 700; color: #1a5276; margin-bottom: 12px; }
.section-header p { font-size: 1.1rem; color: #777; max-width: 600px; margin: 0 auto; }

/* ===== Advantage Cards ===== */
.advantages-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.advantage-card {
    background: #fff; border-radius: 12px; padding: 36px 24px; text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.3s;
}
.advantage-card:hover { transform: translateY(-6px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.advantage-icon { font-size: 2.5rem; margin-bottom: 16px; }
.advantage-card h3 { font-size: 1.15rem; font-weight: 700; color: #1a5276; margin-bottom: 10px; }
.advantage-card p { font-size: 0.9rem; color: #777; line-height: 1.6; }

/* ===== Product Cards ===== */
.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
/* 卡片等高：拉伸填满网格行，正文撑开使标签底部对齐 */
.product-card-wrap { display: flex; height: 100%; color: inherit; text-decoration: none; }
.product-card-wrap .product-card { display: flex; flex-direction: column; width: 100%; }
.product-card-wrap .product-card-body { display: flex; flex-direction: column; flex: 1; }
.product-card-wrap .product-card-body p { flex: 1; }
.product-card {
    background: #fff; border-radius: 12px; overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.3s;
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.product-card img { width: 100%; height: 200px; object-fit: cover; }
.product-card-body { padding: 20px; }
.product-card-body h3 { font-size: 1.05rem; font-weight: 700; color: #1a5276; margin-bottom: 8px; }
.product-card-body p { font-size: 0.85rem; color: #777; margin-bottom: 12px; }
.product-tag {
    display: inline-block; padding: 3px 10px; background: #eaf2f8; color: #1a5276;
    border-radius: 12px; font-size: 0.75rem; font-weight: 500; margin-right: 4px;
}

/* ===== Factory Section ===== */
.factory-content { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.factory-text h2 { font-size: 2rem; font-weight: 700; color: #1a5276; margin-bottom: 16px; }
.factory-text p { color: #666; margin-bottom: 24px; line-height: 1.8; }
.factory-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.factory-tag {
    padding: 8px 20px; background: #eaf2f8; color: #1a5276; border-radius: 20px;
    font-size: 0.9rem; font-weight: 500;
}
.factory-images { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.factory-images img { border-radius: 10px; height: 180px; object-fit: cover; width: 100%; }

/* ===== Cases Section ===== */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
    border-radius: 12px; overflow: hidden; position: relative;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.3s;
}
.case-card:hover { transform: translateY(-6px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.case-card img { width: 100%; height: 220px; object-fit: cover; }
.case-card-body { padding: 24px; background: #fff; }
.case-card-body h3 { font-size: 1.1rem; font-weight: 700; color: #1a5276; margin-bottom: 8px; }
.case-card-body p { font-size: 0.9rem; color: #777; line-height: 1.6; }

/* ===== CTA Section ===== */
.cta-section {
    background: linear-gradient(135deg, #1a5276 0%, #2980b9 100%);
    padding: 80px 0; text-align: center; color: #fff;
}
.cta-section h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 16px; }
.cta-section p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 32px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-white { background: #fff; color: #1a5276; }
.btn-white:hover { background: #f0f0f0; transform: translateY(-2px); }
.btn-ghost { background: transparent; color: #fff; border: 2px solid #fff; }
.btn-ghost:hover { background: #fff; color: #1a5276; }

/* ===== Page Banner ===== */
.page-banner {
    height: 320px; background-size: cover; background-position: center;
    position: relative; display: flex; align-items: center; justify-content: center;
    margin-top: 72px;
}
.page-banner-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(26,82,118,0.8) 0%, rgba(0,0,0,0.5) 100%);
}
.page-banner-content { position: relative; z-index: 2; text-align: center; color: #fff; }
.page-banner-content h1 { font-size: 2.5rem; font-weight: 700; margin-bottom: 8px; }
.page-banner-content p { font-size: 1.1rem; opacity: 0.9; }

/* ===== About Page ===== */
.about-intro { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; padding: 80px 0; }
.about-intro img { border-radius: 12px; width: 100%; height: 400px; object-fit: cover; }
.about-intro-text h2 { font-size: 2rem; color: #1a5276; margin-bottom: 20px; }
.about-intro-text p { color: #666; line-height: 1.8; margin-bottom: 16px; }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }

/* Brand Intro */
.brand-intro-content { max-width: 900px; margin: 0 auto; }
.brand-intro-content p { color: #555; line-height: 1.9; margin-bottom: 18px; font-size: 1rem; }

/* Timeline */
.timeline { padding: 80px 0; background: #f8f9fa; }
.timeline-items { position: relative; max-width: 800px; margin: 0 auto; }
.timeline-items::before {
    content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px;
    background: #d5e8f0; transform: translateX(-50%);
}
.timeline-item { display: flex; align-items: center; margin-bottom: 40px; position: relative; }
.timeline-item:nth-child(odd) { flex-direction: row-reverse; }
.timeline-item:nth-child(odd) .timeline-content { text-align: right; padding-right: 40px; padding-left: 0; }
.timeline-content { flex: 1; padding-left: 40px; }
.timeline-dot {
    width: 16px; height: 16px; border-radius: 50%; background: #e67e22;
    position: absolute; left: 50%; transform: translateX(-50%); z-index: 2;
}
.timeline-year { font-size: 1.1rem; font-weight: 700; color: #e67e22; margin-bottom: 4px; }
.timeline-content h3 { font-size: 1.1rem; color: #1a5276; margin-bottom: 4px; }
.timeline-content p { font-size: 0.9rem; color: #777; }

/* Culture */
.culture-section { padding: 80px 0; }
.culture-quote {
    text-align: center; font-size: 1.3rem; color: #1a5276; font-weight: 600;
    margin-bottom: 40px; padding: 30px; border-left: 4px solid #e67e22;
    background: #fef9f3; border-radius: 0 12px 12px 0;
}
.culture-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.culture-card {
    text-align: center; padding: 30px 20px; border-radius: 12px;
    background: #f8f9fa; transition: all 0.3s;
}
.culture-card:hover { background: #eaf2f8; transform: translateY(-4px); }
.culture-card .icon { font-size: 2rem; margin-bottom: 12px; }
.culture-card h3 { font-size: 1.05rem; color: #1a5276; margin-bottom: 8px; }
.culture-card p { font-size: 0.85rem; color: #777; }

/* Quality Process */
.quality-section { padding: 80px 0; background: #f8f9fa; }
.quality-steps { display: flex; justify-content: space-between; align-items: flex-start; position: relative; }
.quality-steps::before {
    content: ''; position: absolute; top: 30px; left: 5%; right: 5%; height: 2px; background: #d5e8f0;
}
.quality-step { text-align: center; flex: 1; position: relative; z-index: 2; }
.quality-step-num {
    width: 60px; height: 60px; border-radius: 50%; background: #1a5276; color: #fff;
    display: flex; align-items: center; justify-content: center; font-size: 1.3rem;
    font-weight: 700; margin: 0 auto 12px;
}
.quality-step h4 { font-size: 0.95rem; color: #1a5276; margin-bottom: 4px; }
.quality-step p { font-size: 0.8rem; color: #777; }

/* Factory Gallery */
.factory-gallery { padding: 80px 0; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.gallery-grid img { border-radius: 10px; height: 220px; object-fit: cover; width: 100%; transition: all 0.3s; }
.gallery-grid img:hover { transform: scale(1.03); box-shadow: 0 8px 30px rgba(0,0,0,0.15); }

/* ===== Products Page ===== */
.filter-bar { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.filter-btn {
    padding: 10px 24px; border: 2px solid #d5e8f0; border-radius: 25px;
    background: #fff; color: #555; font-size: 0.95rem; cursor: pointer;
    transition: all 0.3s; font-weight: 500;
}
.filter-btn:hover, .filter-btn.active { border-color: #1a5276; background: #1a5276; color: #fff; }

/* ===== Product Detail ===== */
.product-detail { padding: 80px 0; }
.product-detail-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.product-detail-img img { border-radius: 12px; width: 100%; height: 450px; object-fit: cover; }
.product-detail-info h1 { font-size: 2rem; color: #1a5276; margin-bottom: 8px; }
.product-detail-cat { color: #e67e22; font-weight: 600; margin-bottom: 16px; }
.product-detail-price { font-size: 1.5rem; color: #e67e22; font-weight: 700; margin-bottom: 20px; }
.product-detail-desc { color: #666; line-height: 1.8; margin-bottom: 24px; }
.product-features { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.product-feature-tag {
    padding: 6px 14px; background: #eaf2f8; color: #1a5276; border-radius: 15px;
    font-size: 0.85rem;
}
.product-specs { margin-bottom: 24px; }
.product-specs table { width: 100%; border-collapse: collapse; }
.product-specs th, .product-specs td {
    padding: 10px 16px; text-align: left; border-bottom: 1px solid #eee; font-size: 0.9rem;
}
.product-specs th { background: #f8f9fa; color: #1a5276; font-weight: 600; width: 120px; }
.product-scenes { display: flex; flex-wrap: wrap; gap: 8px; }
.product-scene-tag {
    padding: 6px 14px; background: #fef9f3; color: #e67e22; border-radius: 15px;
    font-size: 0.85rem;
}

/* ===== Production Page ===== */
.equipment-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 60px; }
.equipment-card {
    background: #fff; border-radius: 12px; padding: 30px; text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.3s;
}
.equipment-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.equipment-card .icon { font-size: 2.5rem; margin-bottom: 12px; }
.equipment-card h3 { font-size: 1.1rem; color: #1a5276; margin-bottom: 4px; }
.equipment-card .count { color: #e67e22; font-weight: 700; font-size: 1.3rem; margin-bottom: 8px; }
.equipment-card p { font-size: 0.85rem; color: #777; }

.capacity-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 60px; }
.capacity-stat {
    text-align: center; padding: 30px 20px; background: #fff; border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
}
.capacity-stat .number { font-size: 2.5rem; font-weight: 800; color: #1a5276; }
.capacity-stat .number span { font-size: 1rem; color: #e67e22; }
.capacity-stat .label { font-size: 0.9rem; color: #777; margin-top: 4px; }

/* ===== Customization Page ===== */
.custom-flow { position: relative; margin-bottom: 60px; padding-left: 50px; }
.custom-flow::before {
    content: ''; position: absolute; top: 30px; bottom: 30px; left: 29px; width: 2px; background: #d5e8f0;
}
.custom-step { display: flex; align-items: flex-start; margin-bottom: 36px; position: relative; }
.custom-step:last-child { margin-bottom: 0; }
.custom-step-num {
    width: 60px; height: 60px; border-radius: 50%; background: #e67e22; color: #fff;
    display: flex; align-items: center; justify-content: center; font-size: 1.3rem;
    font-weight: 700; flex-shrink: 0; position: absolute; left: -50px; top: 0;
}
.custom-step-content { padding-left: 20px; }
.custom-step h4 { font-size: 1.1rem; color: #1a5276; margin-bottom: 6px; }
.custom-step p { font-size: 0.95rem; color: #666; line-height: 1.6; }

.service-modes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 60px; }
.service-mode {
    background: #fff; border-radius: 12px; padding: 30px; text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.3s;
}
.service-mode:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.service-mode .icon { font-size: 2.5rem; margin-bottom: 12px; }
.service-mode h3 { font-size: 1.1rem; color: #1a5276; margin-bottom: 8px; }
.service-mode p { font-size: 0.85rem; color: #777; }

.custom-advantages { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; margin-bottom: 60px; }
.custom-adv {
    text-align: center; padding: 24px 16px; background: #f8f9fa; border-radius: 12px;
}
.custom-adv .icon { font-size: 2rem; margin-bottom: 8px; }
.custom-adv h4 { font-size: 0.9rem; color: #1a5276; margin-bottom: 4px; }
.custom-adv p { font-size: 0.8rem; color: #777; }

.materials-section { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.material-group h3 { font-size: 1.2rem; color: #1a5276; margin-bottom: 16px; }
.material-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.material-tag {
    padding: 10px 20px; background: #eaf2f8; color: #1a5276; border-radius: 20px;
    font-size: 0.9rem; font-weight: 500;
}

/* ===== Cases Page ===== */
.market-dist { display: flex; justify-content: center; gap: 40px; margin-bottom: 50px; flex-wrap: wrap; }
.market-item { text-align: center; }
.market-item .percent { font-size: 2rem; font-weight: 800; color: #1a5276; }
.market-item .label { font-size: 0.9rem; color: #777; }

.cases-detail-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-detail-card {
    background: #fff; border-radius: 12px; overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.3s;
}
.case-detail-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.case-detail-card img { width: 100%; height: 200px; object-fit: cover; }
.case-detail-body { padding: 24px; }
.case-detail-body .tag {
    display: inline-block; padding: 4px 12px; background: #e67e22; color: #fff;
    border-radius: 12px; font-size: 0.75rem; margin-bottom: 10px;
}
.case-detail-body h3 { font-size: 1.1rem; color: #1a5276; margin-bottom: 8px; }
.case-detail-body p { font-size: 0.9rem; color: #777; line-height: 1.6; margin-bottom: 8px; }
.case-detail-body .result { font-size: 0.85rem; color: #e67e22; font-weight: 600; }

/* ===== News Page ===== */
.news-filter { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
    background: #fff; border-radius: 12px; overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06); transition: all 0.3s;
}
.news-card:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(0,0,0,0.12); }
.news-card img { width: 100%; height: 200px; object-fit: cover; }
.news-card-body { padding: 24px; }
.news-card-body .meta { display: flex; justify-content: space-between; margin-bottom: 10px; }
.news-card-body .tag {
    display: inline-block; padding: 3px 10px; background: #eaf2f8; color: #1a5276;
    border-radius: 10px; font-size: 0.75rem;
}
.news-card-body .date { font-size: 0.8rem; color: #999; }
.news-card-body h3 { font-size: 1.05rem; color: #1a5276; margin-bottom: 8px; line-height: 1.4; }
.news-card-body p { font-size: 0.85rem; color: #777; line-height: 1.6; }

/* ===== Contact Page ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; padding: 80px 0; }
.contact-info-list { margin-bottom: 30px; }
.contact-info-item {
    display: flex; align-items: flex-start; gap: 16px; margin-bottom: 24px;
}
.contact-info-item .icon { font-size: 1.5rem; width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; background: #eaf2f8; border-radius: 12px; flex-shrink: 0; }
.contact-info-item h4 { font-size: 0.95rem; color: #1a5276; margin-bottom: 4px; }
.contact-info-item p { font-size: 0.9rem; color: #666; }

.contact-form { background: #f8f9fa; padding: 36px; border-radius: 12px; }
.contact-form h3 { font-size: 1.3rem; color: #1a5276; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 0.9rem; color: #555; margin-bottom: 6px; font-weight: 500; }
.form-group label .required { color: #e74c3c; }
.form-group input, .form-group select, .form-group textarea {
    width: 100%; padding: 12px 16px; border: 1px solid #ddd; border-radius: 8px;
    font-size: 0.95rem; transition: border-color 0.3s; background: #fff;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none; border-color: #1a5276;
}
.form-group textarea { height: 120px; resize: vertical; }
.form-submit { width: 100%; padding: 14px; background: #e67e22; color: #fff; border: none; border-radius: 8px; font-size: 1rem; font-weight: 600; cursor: pointer; transition: all 0.3s; }
.form-submit:hover { background: #d35400; }

/* ===== Footer ===== */
.footer { background: #1a2a3a; color: #ccc; padding: 60px 0 30px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand h3 { font-size: 1.3rem; color: #fff; margin-bottom: 12px; }
.footer-brand h3 span { color: #e67e22; }
.footer-brand p { font-size: 0.9rem; line-height: 1.6; }
.footer-col h4 { font-size: 1rem; color: #fff; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 0.9rem; color: #aaa; margin-bottom: 10px; transition: color 0.3s; }
.footer-col a:hover { color: #e67e22; }
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px;
    text-align: center; font-size: 0.85rem; color: #888;
}
.footer-bottom a { color: #aaa; text-decoration: none; transition: color 0.3s; }
.footer-bottom a:hover { color: #e67e22; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .advantages-grid, .products-grid, .culture-grid, .service-modes { grid-template-columns: repeat(2, 1fr); }
    .capacity-stats { grid-template-columns: repeat(2, 1fr); }
    .custom-advantages { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .nav { display: none; position: fixed; top: 72px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 20px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); }
    .nav.open { display: flex; }
    .hamburger { display: flex; }
    .hero-content h1 { font-size: 2.2rem; }
    .advantages-grid, .products-grid, .cases-grid, .cases-detail-grid, .news-grid, .equipment-grid { grid-template-columns: 1fr; }
    .factory-content, .about-intro, .product-detail-grid, .contact-grid, .materials-section { grid-template-columns: 1fr; }
    .culture-grid, .capacity-stats { grid-template-columns: repeat(2, 1fr); }
    .service-modes { grid-template-columns: 1fr; }
    .custom-advantages { grid-template-columns: repeat(2, 1fr); }
    .quality-steps { flex-direction: column; gap: 24px; }
    .quality-steps::before { display: none; }
    .footer-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .section { padding: 50px 0; }
    .section-header h2 { font-size: 1.7rem; }
    .timeline-items::before { left: 20px; }
    .timeline-item, .timeline-item:nth-child(odd) { flex-direction: row; }
    .timeline-item:nth-child(odd) .timeline-content { text-align: left; padding-right: 0; padding-left: 40px; }
    .timeline-dot { left: 20px; }
    .timeline-content { padding-left: 40px; }
}

/* ===== Inquiry Modal ===== */
.modal-overlay {
    display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5); z-index: 9999; justify-content: center; align-items: center;
    padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal-box {
    background: #fff; border-radius: 12px; width: 100%; max-width: 520px;
    max-height: 90vh; overflow-y: auto; position: relative;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3); animation: modalIn 0.3s ease;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(-30px) scale(0.95); } to { opacity: 1; transform: translateY(0) scale(1); } }
.modal-close {
    position: absolute; top: 12px; right: 16px; width: 36px; height: 36px;
    border: none; background: #f0f0f0; border-radius: 50%; font-size: 1.4rem;
    cursor: pointer; display: flex; align-items: center; justify-content: center;
    color: #666; transition: all 0.2s; z-index: 1;
}
.modal-close:hover { background: #e0e0e0; color: #333; }
.modal-header {
    padding: 28px 28px 0; text-align: center;
}
.modal-header h3 { font-size: 1.4rem; color: #1a5276; margin-bottom: 6px; }
.modal-header p { color: #888; font-size: 0.9rem; }
.modal-product-bar {
    margin: 16px 28px 0; padding: 12px 16px; background: #f8f9fa;
    border-radius: 8px; font-size: 0.9rem; color: #1a5276; font-weight: 500;
    display: none;
}
.modal-product-bar.active { display: block; }
.modal-form { padding: 20px 28px 28px; }
.modal-form .form-group { margin-bottom: 16px; }
.modal-form label { display: block; font-size: 0.9rem; font-weight: 600; color: #333; margin-bottom: 6px; }
.modal-form label .required { color: #e74c3c; }
.modal-form input, .modal-form textarea, .modal-form select {
    width: 100%; padding: 10px 14px; border: 1.5px solid #ddd; border-radius: 8px;
    font-size: 0.95rem; transition: border-color 0.3s; outline: none;
    font-family: inherit;
}
.modal-form input:focus, .modal-form textarea:focus, .modal-form select:focus {
    border-color: #e67e22;
}
.modal-form textarea { resize: vertical; min-height: 80px; }
.modal-form .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.modal-submit {
    width: 100%; padding: 14px; background: #e67e22; color: #fff;
    border: none; border-radius: 8px; font-size: 1.05rem; font-weight: 600;
    cursor: pointer; transition: background 0.3s; margin-top: 8px;
}
.modal-submit:hover { background: #d35400; }
.modal-submit:disabled { background: #ccc; cursor: not-allowed; }
.modal-success {
    display: none; text-align: center; padding: 40px 28px;
}
.modal-success.active { display: block; }
.modal-success .success-icon { font-size: 3rem; margin-bottom: 12px; }
.modal-success h4 { font-size: 1.2rem; color: #1a5276; margin-bottom: 8px; }
.modal-success p { color: #666; font-size: 0.95rem; }
@media (max-width: 768px) {
    .modal-box { max-width: 100%; margin: 10px; }
    .modal-form .form-row { grid-template-columns: 1fr; }
    .modal-header { padding: 24px 20px 0; }
    .modal-form { padding: 16px 20px 24px; }
    .modal-product-bar { margin: 12px 20px 0; }
}


/* Language Switcher */
.lang-switcher { margin-left: 12px; }
.lang-switcher select {
    padding: 6px 10px; border: 1px solid #ddd; border-radius: 6px;
    font-size: 0.85rem; color: #555; background: #fff; cursor: pointer;
    outline: none; transition: border-color 0.3s;
}
.lang-switcher select:hover { border-color: #e67e22; }