/* ==========================================
   弘州科技（肇庆）有限公司 - 公共样式
   蓝白色调，科技感风格，支持中英文切换
   ========================================== */

/* CSS Variables */
:root {
    --primary-blue: #0066cc;
    --primary-blue-dark: #004a99;
    --primary-blue-light: #3399ff;
    --accent-cyan: #00b4d8;
    --white: #ffffff;
    --off-white: #f5f8fa;
    --light-gray: #e8eef3;
    --text-dark: #1a2b3c;
    --text-gray: #5a6b7c;
    --text-light: #8a9bac;
    --border-color: #d0dae6;
    --shadow-light: rgba(0, 102, 204, 0.1);
    --shadow-medium: rgba(0, 102, 204, 0.15);
    --gradient-blue: linear-gradient(135deg, #0066cc 0%, #00b4d8 100%);
    --gradient-dark: linear-gradient(135deg, #1a2b3c 0%, #2d4a5e 100%);
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --border-radius: 8px;
    --border-radius-lg: 16px;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
    min-height: 100vh;
}

a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--text-dark); }
h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

.text-center { text-align: center; }
.text-primary { color: var(--primary-blue); }

/* ==========================================
   中英文切换
   ========================================== */
html.lang-en .zh { display: none !important; }
html:not(.lang-en) .en { display: none !important; }

.lang-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: 2px solid var(--primary-blue);
    border-radius: 999px;
    background: transparent;
    color: var(--primary-blue);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}
.lang-toggle:hover { background: var(--primary-blue); color: var(--white); transform: translateY(-1px); }
.lang-btn-inner { display: inline-flex; align-items: center; gap: 6px; }
.lang-btn-inner svg { flex-shrink: 0; }

/* ==========================================
   Header
   ========================================== */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    background: var(--white);
    box-shadow: 0 2px 20px var(--shadow-light);
    transition: all var(--transition-normal);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 80px; }

.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-icon {
    width: 48px; height: 48px;
    background: var(--gradient-blue);
    border-radius: var(--border-radius);
    display: flex; align-items: center; justify-content: center;
    color: var(--white); font-size: 1.5rem; font-weight: bold;
}
.logo-text { font-size: 1.25rem; font-weight: 600; color: var(--text-dark); line-height: 1.2; }
.logo-text span { display: block; font-size: 0.7rem; color: var(--text-gray); font-weight: 400; }

.nav { display: flex; align-items: center; gap: 24px; }
.nav-list { display: flex; gap: 32px; }
.nav-item { position: relative; }

.nav-link {
    font-size: 0.95rem;
    color: var(--text-dark);
    padding: 8px 0;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color var(--transition-fast);
}
.nav-caret { opacity: 0.6; }

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 0; height: 2px;
    background: var(--gradient-blue);
    transition: width var(--transition-normal);
}
.nav-link:hover, .nav-link.active { color: var(--primary-blue); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-item { display: block; }
.nav-item .nav-link { display: flex; }

/* Dropdown */
.nav-dropdown {
    position: absolute;
    top: 100%; left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 40px var(--shadow-medium);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    padding: 10px;
    margin-top: 8px;
    max-height: 75vh;
    overflow-y: auto;
}
.nav-item:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}
.nav-dropdown a {
    display: block;
    padding: 10px 16px;
    font-size: 0.88rem;
    color: var(--text-dark);
    border-radius: 6px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}
.nav-dropdown a:hover { background: var(--off-white); color: var(--primary-blue); }
.nav-dropdown-wide { min-width: 540px; column-count: 2; column-gap: 8px; }
.nav-dropdown-wide a { break-inside: avoid; }

.header-actions { display: flex; align-items: center; gap: 12px; }

/* Mobile Menu */
.menu-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 10px; }
.menu-toggle span { width: 24px; height: 2px; background: var(--text-dark); transition: all var(--transition-normal); }
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ==========================================
   Hero
   ========================================== */
.hero {
    padding: 160px 0 100px;
    background: linear-gradient(135deg, #f0f7ff 0%, #e0f0ff 100%);
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%230066cc' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}
.hero-content {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
}
.hero-text h1 {
    font-size: 2.8rem;
    margin-bottom: 20px;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.hero-text .hero-sub {
    font-size: 1.05rem;
    color: var(--primary-blue);
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 14px;
}
.hero-text p { font-size: 1.05rem; color: var(--text-gray); margin-bottom: 30px; line-height: 1.8; }
.hero-image { position: relative; }
.hero-image img {
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 60px var(--shadow-medium);
}
.hero-stats { display: flex; gap: 40px; margin-top: 30px; }
.hero-stat h3 { font-size: 1.8rem; color: var(--primary-blue); }
.hero-stat p { font-size: 0.85rem; color: var(--text-gray); margin: 0; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
}
.btn-primary { background: var(--gradient-blue); color: var(--white); box-shadow: 0 4px 20px var(--shadow-medium); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px var(--shadow-medium); color: var(--white); }
.btn-outline { background: transparent; color: var(--primary-blue); border: 2px solid var(--primary-blue); }
.btn-outline:hover { background: var(--primary-blue); color: var(--white); }
.btn-white { background: var(--white); color: var(--primary-blue); }
.btn-white:hover { background: var(--off-white); }

/* ==========================================
   Sections
   ========================================== */
.section { padding: 80px 0; }
.section-gray { background: var(--off-white); }

.section-header { text-align: center; margin-bottom: 50px; }
.section-header h2 { position: relative; display: inline-block; margin-bottom: 16px; }
.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -8px; left: 50%;
    transform: translateX(-50%);
    width: 60px; height: 3px;
    background: var(--gradient-blue);
    border-radius: 2px;
}
.section-header p { color: var(--text-gray); max-width: 640px; margin: 0 auto; }

.section-tag {
    display: inline-block;
    color: var(--primary-blue);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-bottom: 12px;
}

/* Cards */
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 30px; }
.card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 34px 28px;
    box-shadow: 0 4px 20px var(--shadow-light);
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}
.card:hover { transform: translateY(-5px); box-shadow: 0 10px 40px var(--shadow-medium); }
.card-icon {
    width: 60px; height: 60px;
    background: var(--gradient-blue);
    border-radius: var(--border-radius);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 20px;
    color: var(--white);
}
.card-icon svg { width: 28px; height: 28px; stroke: currentColor; fill: none; stroke-width: 2; }
.card h3 { margin-bottom: 12px; font-size: 1.2rem; }
.card p { color: var(--text-gray); font-size: 0.93rem; }

/* ==========================================
   Product Cards
   ========================================== */
.product-card {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 20px var(--shadow-light);
    transition: all var(--transition-normal);
    display: flex;
    flex-direction: column;
    border: 1px solid var(--light-gray);
}
.product-card:hover { transform: translateY(-6px); box-shadow: 0 12px 40px var(--shadow-medium); }
.product-card-img { height: 230px; overflow: hidden; background: var(--white); display: flex; align-items: center; justify-content: center; padding: 14px; }
.product-card-img img { width: 100%; height: 100%; object-fit: contain; transition: transform 0.5s ease; }
.product-card:hover .product-card-img img { transform: scale(1.06); }
.product-card-body { padding: 22px 24px 26px; flex: 1; display: flex; flex-direction: column; }
.product-card-model { font-size: 0.8rem; color: var(--primary-blue); font-weight: 700; letter-spacing: 1px; margin-bottom: 6px; }
.product-card-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.product-card-body p { font-size: 0.86rem; color: var(--text-light); flex: 1; }
.product-card-more {
    margin-top: 16px;
    color: var(--primary-blue);
    font-size: 0.88rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.product-card-more svg { transition: transform var(--transition-fast); }
.product-card:hover .product-card-more svg { transform: translateX(4px); }

/* ==========================================
   Page Banner（子页面顶部）
   ========================================== */
.page-banner {
    padding: 150px 0 60px;
    background: linear-gradient(135deg, #0d3b66 0%, #0066cc 60%, #00b4d8 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}
.page-banner::after {
    content: '';
    position: absolute;
    right: -80px; bottom: -120px;
    width: 360px; height: 360px;
    border-radius: 50%;
    border: 40px solid rgba(255, 255, 255, 0.06);
}
.page-banner h1 { color: var(--white); font-size: 2.2rem; margin-top: 10px; }
.page-banner-sub { color: rgba(255, 255, 255, 0.75); margin-top: 8px; font-size: 0.95rem; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: rgba(255, 255, 255, 0.7); flex-wrap: wrap; }
.breadcrumb a { color: rgba(255, 255, 255, 0.85); }
.breadcrumb a:hover { color: var(--white); }
.breadcrumb em { font-style: normal; color: var(--white); }

/* ==========================================
   About 页
   ========================================== */
.about-intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.about-intro-img img { border-radius: var(--border-radius-lg); box-shadow: 0 15px 50px var(--shadow-medium); }
.about-intro-text h2 { margin-bottom: 20px; }
.about-intro-text p { color: var(--text-gray); margin-bottom: 14px; line-height: 1.9; font-size: 0.98rem; }
.about-intro-text .about-quote {
    border-left: 4px solid var(--primary-blue);
    background: var(--off-white);
    padding: 14px 20px;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    color: var(--primary-blue-dark);
    font-weight: 600;
    margin-top: 20px;
}

.about-team-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; }
.about-team-item { border-radius: var(--border-radius-lg); overflow: hidden; box-shadow: 0 6px 24px var(--shadow-light); position: relative; }
.about-team-item img { width: 100%; height: 260px; object-fit: cover; transition: transform 0.5s ease; }
.about-team-item:hover img { transform: scale(1.05); }

.culture-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
.culture-item {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 30px 26px;
    box-shadow: 0 4px 20px var(--shadow-light);
    border-top: 4px solid var(--primary-blue);
    transition: all var(--transition-normal);
}
.culture-item:hover { transform: translateY(-5px); box-shadow: 0 10px 40px var(--shadow-medium); }
.culture-item .culture-label {
    display: inline-block;
    font-size: 0.78rem;
    color: var(--primary-blue);
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 10px;
    text-transform: uppercase;
}
.culture-item h3 { font-size: 1.15rem; margin-bottom: 10px; }
.culture-item p { color: var(--text-gray); font-size: 0.92rem; }

.honor-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 24px; }
.honor-item {
    background: var(--white);
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
    position: relative;
    box-shadow: 0 4px 16px var(--shadow-light);
}
.honor-item:hover { border-color: var(--primary-blue); transform: translateY(-6px); box-shadow: 0 14px 36px var(--shadow-medium); }
.honor-item .honor-img-wrap {
    background: linear-gradient(160deg, #fafcff 0%, #eef4fb 100%);
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.honor-item img {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
    cursor: zoom-in;
    transition: transform 0.35s ease;
    background: var(--white);
}
.honor-item:hover img { transform: scale(1.03); }
.honor-item .honor-name {
    padding: 14px 10px;
    text-align: center;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-dark);
    border-top: 1px solid var(--light-gray);
}

/* Lightbox 图片放大 */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(10, 25, 40, 0.88);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    cursor: zoom-out;
}
.lightbox-overlay.active { opacity: 1; visibility: visible; }
.lightbox-overlay img {
    max-width: 92vw;
    max-height: 88vh;
    object-fit: contain;
    border-radius: var(--border-radius);
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.5);
    background: var(--white);
    transform: scale(0.92);
    transition: transform 0.3s ease;
    cursor: default;
}
.lightbox-overlay.active img { transform: scale(1); }
.lightbox-close {
    position: absolute;
    top: 24px; right: 28px;
    width: 44px; height: 44px;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
    color: var(--white);
    font-size: 1.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}
.lightbox-close:hover { background: rgba(255, 255, 255, 0.25); }

.workshop-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.workshop-item { border-radius: var(--border-radius); overflow: hidden; position: relative; box-shadow: 0 4px 16px var(--shadow-light); }
.workshop-item img { width: 100%; height: 170px; object-fit: cover; transition: transform 0.5s ease; }
.workshop-item:hover img { transform: scale(1.08); }
.workshop-item .workshop-name {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    background: linear-gradient(transparent, rgba(13, 59, 102, 0.85));
    color: var(--white);
    font-size: 0.85rem;
    padding: 26px 12px 10px;
}

.equipment-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.equipment-item { border-radius: var(--border-radius); overflow: hidden; background: var(--white); box-shadow: 0 4px 16px var(--shadow-light); }
.equipment-item img { width: 100%; height: 160px; object-fit: cover; transition: transform 0.5s ease; }
.equipment-item:hover img { transform: scale(1.06); }

.quality-banner {
    background: var(--gradient-dark);
    border-radius: var(--border-radius-lg);
    padding: 46px 50px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    color: var(--white);
    align-items: center;
    margin-top: 50px;
}
.quality-banner h3 { color: var(--white); font-size: 1.4rem; margin-bottom: 10px; }
.quality-banner p { color: rgba(255, 255, 255, 0.75); font-size: 0.93rem; }

/* ==========================================
   Products 列表页
   ========================================== */
.products-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 30px; }

/* ==========================================
   产品详情页
   ========================================== */
.product-overview-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.product-overview-img img { border-radius: var(--border-radius-lg); box-shadow: 0 15px 50px var(--shadow-medium); width: 100%; }
.feature-list li { display: flex; gap: 12px; margin-bottom: 16px; align-items: flex-start; }
.feature-list li svg { flex-shrink: 0; color: var(--primary-blue); margin-top: 4px; }
.feature-list li span { color: var(--text-gray); line-height: 1.8; font-size: 0.96rem; }

.product-use {
    margin-top: 50px;
    background: var(--off-white);
    border-radius: var(--border-radius-lg);
    padding: 30px 34px;
    display: flex;
    gap: 22px;
    align-items: flex-start;
    border-left: 5px solid var(--primary-blue);
}
.product-use-icon {
    width: 52px; height: 52px;
    background: var(--gradient-blue);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}
.product-use h3 { font-size: 1.1rem; margin-bottom: 8px; }
.product-use p { color: var(--text-gray); font-size: 0.94rem; line-height: 1.85; }

.advantage-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.advantage-item {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 26px 28px;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    box-shadow: 0 4px 20px var(--shadow-light);
    transition: all var(--transition-normal);
}
.advantage-item:hover { transform: translateY(-4px); box-shadow: 0 10px 36px var(--shadow-medium); }
.advantage-num {
    font-size: 1.6rem;
    font-weight: 800;
    background: var(--gradient-blue);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    flex-shrink: 0;
}
.advantage-item p { color: var(--text-gray); font-size: 0.93rem; line-height: 1.75; }

.config-intro { max-width: 900px; margin: -20px auto 30px; color: var(--text-gray); text-align: center; line-height: 1.9; font-size: 0.95rem; }
.config-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 16px; max-width: 980px; margin: 0 auto; }
.config-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    background: var(--off-white);
    border-radius: var(--border-radius);
    padding: 16px 18px;
    transition: all var(--transition-fast);
}
.config-item:hover { background: #e8f2fc; }
.config-item svg { flex-shrink: 0; color: var(--primary-blue); margin-top: 3px; }
.config-item span { font-size: 0.92rem; color: var(--text-dark); line-height: 1.6; }

.app-gallery { display: grid; gap: 20px; max-width: 980px; margin: 0 auto; }
.app-gallery-2 { grid-template-columns: repeat(2, 1fr); }
.app-gallery-3 { grid-template-columns: repeat(3, 1fr); }
.app-gallery-4, .app-gallery-5 { grid-template-columns: repeat(3, 1fr); }
.app-gallery-item {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    background: var(--white);
    box-shadow: 0 6px 24px var(--shadow-light);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}
.app-gallery-item img { max-height: 260px; object-fit: contain; transition: transform 0.4s ease; }
.app-gallery-item:hover img { transform: scale(1.04); }

.param-table-wrap {
    overflow-x: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 6px 30px var(--shadow-light);
    background: var(--white);
    -webkit-overflow-scrolling: touch;
}
.param-table { width: 100%; border-collapse: collapse; min-width: 860px; font-size: 0.88rem; }
.param-table th, .param-table td {
    border: 1px solid var(--light-gray);
    padding: 11px 14px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
}
.param-table thead th {
    background: var(--gradient-dark);
    color: var(--white);
    font-weight: 600;
    position: sticky;
    top: 0;
}
.param-table tbody tr:nth-child(even) { background: var(--off-white); }
.param-table tbody tr:hover { background: #e8f2fc; }
.param-table .param-label { text-align: left; min-width: 190px; font-weight: 600; color: var(--text-dark); }
.param-table .param-unit { color: var(--text-light); min-width: 56px; }
.param-sub { display: block; font-size: 0.78rem; color: var(--primary-blue); font-weight: 500; }
.param-sub-cell { display: block; font-size: 0.75rem; color: var(--text-light); }

.product-nav { padding: 30px 0 70px; }
.product-nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    border-top: 1px solid var(--light-gray);
    padding-top: 30px;
}
.product-nav-link { display: flex; flex-direction: column; gap: 4px; max-width: 34%; }
.product-nav-link.next { text-align: right; align-items: flex-end; }
.product-nav-dir { font-size: 0.78rem; color: var(--text-light); }
.product-nav-link strong { font-size: 0.92rem; color: var(--primary-blue); font-weight: 600; }
.product-nav-link:hover strong { text-decoration: underline; }

/* ==========================================
   Contact 页
   ========================================== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 50px; align-items: flex-start; }
.contact-info-item { display: flex; gap: 18px; margin-bottom: 28px; align-items: flex-start; }
.contact-info-icon {
    width: 52px; height: 52px;
    background: var(--gradient-blue);
    border-radius: var(--border-radius);
    display: flex; align-items: center; justify-content: center;
    color: var(--white);
    flex-shrink: 0;
}
.contact-info-item h4 { font-size: 1rem; margin-bottom: 6px; }
.contact-info-item p { color: var(--text-gray); font-size: 0.93rem; line-height: 1.7; }

.contact-form {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: 0 10px 40px var(--shadow-medium);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.88rem; font-weight: 600; margin-bottom: 8px; }
.form-group label .required { color: #e74c3c; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color var(--transition-fast);
    background: var(--off-white);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary-blue);
    background: var(--white);
}
.form-group input.error, .form-group textarea.error { border-color: #e74c3c; }
.form-group textarea { min-height: 130px; resize: vertical; }

/* CTA strip */
.cta-strip {
    background: linear-gradient(135deg, #0d3b66 0%, #0066cc 100%);
    color: var(--white);
    padding: 60px 0;
    text-align: center;
}
.cta-strip h2 { color: var(--white); margin-bottom: 14px; }
.cta-strip p { color: rgba(255, 255, 255, 0.8); margin-bottom: 28px; }

/* ==========================================
   Footer
   ========================================== */
.footer { background: #122a3f; color: rgba(255, 255, 255, 0.75); }
.footer-main { padding: 60px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 0.8fr 1.6fr 1.3fr; gap: 40px; }
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-logo .logo-icon { width: 44px; height: 44px; font-size: 1.3rem; }
.footer-logo-text { font-size: 1.05rem; font-weight: 600; color: var(--white); }
.footer-slogan { color: var(--accent-cyan); font-weight: 600; margin-bottom: 12px; letter-spacing: 1px; }
.footer-desc { font-size: 0.88rem; line-height: 1.8; color: rgba(255, 255, 255, 0.55); }
.footer-col h4 { color: var(--white); font-size: 1rem; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
.footer-col h4::after { content: ''; position: absolute; left: 0; bottom: 0; width: 28px; height: 2px; background: var(--accent-cyan); }
.footer-links li { margin-bottom: 10px; }
.footer-links a { font-size: 0.87rem; color: rgba(255, 255, 255, 0.65); transition: color var(--transition-fast); }
.footer-links a:hover { color: var(--accent-cyan); }
.footer-links-products { display: grid; grid-template-columns: 1fr 1fr; gap: 6px 18px; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 14px; font-size: 0.87rem; align-items: flex-start; }
.footer-contact svg { flex-shrink: 0; color: var(--accent-cyan); margin-top: 4px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding: 18px 0; }
.footer-bottom p { text-align: center; font-size: 0.82rem; color: rgba(255, 255, 255, 0.45); }

/* ==========================================
   Animations
   ========================================== */
.fade-target { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.fade-target.fade-in-up { opacity: 1; transform: translateY(0); }

/* ==========================================
   Responsive
   ========================================== */
@media (max-width: 992px) {
    .nav-list {
        position: fixed;
        top: 80px; left: 0; right: 0;
        background: var(--white);
        flex-direction: column;
        gap: 0;
        padding: 10px 20px 20px;
        box-shadow: 0 20px 40px var(--shadow-medium);
        display: none;
        max-height: calc(100vh - 80px);
        overflow-y: auto;
    }
    .nav-list.active { display: flex; }
    .nav-list .nav-item { padding: 6px 0; }
    .nav-dropdown {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        display: none;
        box-shadow: none;
        margin-top: 4px;
        padding: 0 0 0 16px;
        max-height: none;
    }
    .nav-item.open .nav-dropdown { display: block; }
    .nav-dropdown-wide { min-width: 0; column-count: 1; }
    .nav-caret { display: none; }
    .menu-toggle { display: flex; }

    .hero-content, .about-intro-grid, .product-overview-grid,
    .contact-grid, .quality-banner { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .workshop-grid { grid-template-columns: repeat(2, 1fr); }
    .equipment-grid { grid-template-columns: repeat(2, 1fr); }
    .app-gallery-3, .app-gallery-4, .app-gallery-5 { grid-template-columns: repeat(2, 1fr); }
    .hero-text h1 { font-size: 2.2rem; }
}

@media (max-width: 640px) {
    .hero { padding: 130px 0 70px; }
    .hero-content { gap: 36px; }
    .hero-text h1 { font-size: 1.8rem; }
    .hero-stats { gap: 24px; flex-wrap: wrap; }
    .section { padding: 60px 0; }
    h2 { font-size: 1.6rem; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .workshop-grid, .equipment-grid, .app-gallery-2, .app-gallery-3,
    .app-gallery-4, .app-gallery-5 { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .contact-form { padding: 26px 20px; }
    .quality-banner { padding: 30px 24px; }
    .product-nav-inner { flex-direction: column; }
    .product-nav-link { max-width: 100%; }
    .page-banner h1 { font-size: 1.7rem; }
    .about-team-grid { grid-template-columns: 1fr 1fr; }
    .lang-toggle { padding: 6px 12px; font-size: 0.8rem; }
    .logo-text { display: none; }
}