/* =============================================
   Btimes Inc. - 主样式表
   配色参考 rammount.com：深蓝+橙色+白色
   ============================================= */

/* CSS 变量 */
:root {
    --primary:     #003A70;
    --primary-dark:#002655;
    --primary-light:#0056A8;
    --accent:      #FF6B00;
    --accent-dark: #E55A00;
    --white:       #FFFFFF;
    --light-gray:  #F5F7FA;
    --mid-gray:    #E8ECF0;
    --text:        #1A1A1A;
    --text-light:  #555555;
    --text-muted:  #888888;
    --border:      #DEE2E8;
    --shadow-sm:   0 2px 8px rgba(0,0,0,0.08);
    --shadow-md:   0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg:   0 8px 40px rgba(0,0,0,0.16);
    --radius:      6px;
    --radius-lg:   12px;
    --transition:  0.3s ease;
    --font-zh:     'Noto Sans SC', sans-serif;
    --font-en:     'Roboto', sans-serif;
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-zh); color: var(--text); background: var(--white); line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

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

/* =====================
   HEADER
   ===================== */
.site-header { position: sticky; top: 0; z-index: 1000; background: var(--white); box-shadow: var(--shadow-sm); }

.header-top { background: var(--primary); color: rgba(255,255,255,0.85); font-size: 13px; padding: 8px 0; }
.header-top-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.header-contact { display: flex; gap: 24px; }
.header-contact span { display: flex; align-items: center; gap: 6px; }

.header-main { padding: 16px 0; }
.header-main-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; }

/* Logo */
.site-logo a { display: flex; align-items: center; }
.logo-text { display: flex; flex-direction: column; line-height: 1.2; }
.logo-zh { font-size: 22px; font-weight: 700; color: var(--primary); letter-spacing: 2px; }
.logo-en { font-size: 11px; font-weight: 500; color: var(--accent); letter-spacing: 3px; font-family: var(--font-en); }

/* 导航 */
.main-nav { flex: 1; }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu > li { position: relative; }
.nav-menu > li > a {
    display: block; padding: 10px 16px; font-size: 15px; font-weight: 500;
    color: var(--text); border-radius: var(--radius); transition: all var(--transition);
    white-space: nowrap;
}
.nav-menu > li > a:hover,
.nav-menu > li.current-menu-item > a,
.nav-menu > li.current-menu-ancestor > a { color: var(--primary); background: rgba(0,58,112,0.06); }

/* 下拉菜单 */
.nav-menu .sub-menu {
    position: absolute; top: calc(100% + 8px); left: 0; min-width: 200px;
    background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
    border: 1px solid var(--border); opacity: 0; visibility: hidden;
    transform: translateY(-8px); transition: all var(--transition); z-index: 100;
    padding: 8px 0;
}
.nav-menu li:hover > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.sub-menu li a {
    display: block; padding: 10px 20px; font-size: 14px; color: var(--text-light);
    transition: all var(--transition);
}
.sub-menu li a:hover { color: var(--primary); background: var(--light-gray); padding-left: 26px; }

/* Header Actions */
.header-actions { display: flex; align-items: center; gap: 12px; }
.search-toggle { display: flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: 50%; color: var(--text-light); transition: all var(--transition); }
.search-toggle:hover { background: var(--light-gray); color: var(--primary); }
.mobile-menu-toggle { display: none; flex-direction: column; gap: 5px; width: 40px; height: 40px; align-items: center; justify-content: center; }
.mobile-menu-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all var(--transition); }
.mobile-menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-toggle.active span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Search Overlay */
.search-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.7); z-index: 2000;
    display: flex; align-items: center; opacity: 0; visibility: hidden; transition: all var(--transition);
}
.search-overlay.active { opacity: 1; visibility: visible; }
.search-overlay form { display: flex; gap: 12px; width: 100%; max-width: 700px; margin: 0 auto; }
.search-overlay input {
    flex: 1; padding: 16px 20px; font-size: 18px; border: none; border-radius: var(--radius);
    outline: none; font-family: var(--font-zh);
}
.search-overlay button[type="submit"] {
    padding: 16px 32px; background: var(--accent); color: var(--white);
    border-radius: var(--radius); font-size: 16px; font-weight: 500; transition: background var(--transition);
}
.search-overlay button[type="submit"]:hover { background: var(--accent-dark); }
.search-close { color: var(--white); font-size: 24px; padding: 8px; }

/* =====================
   HERO SECTION
   ===================== */
.hero-section { position: relative; overflow: hidden; height: 620px; }
.hero-slider { position: relative; height: 100%; }
.hero-slide {
    position: absolute; inset: 0; opacity: 0; transition: opacity 0.8s ease;
    display: flex; align-items: center;
}
.hero-slide.active { opacity: 1; z-index: 1; }
.hero-slide-bg {
    position: absolute; inset: 0; background-size: cover; background-position: center;
    transform: scale(1.05); transition: transform 8s ease;
}
.hero-slide.active .hero-slide-bg { transform: scale(1); }
.hero-slide-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0,58,112,0.85) 0%, rgba(0,38,85,0.6) 60%, rgba(0,0,0,0.2) 100%); }
.hero-content { position: relative; z-index: 2; color: var(--white); max-width: 680px; padding: 0 0 0 80px; }
.hero-badge { display: inline-block; background: var(--accent); color: var(--white); font-size: 12px; font-weight: 600; padding: 4px 14px; border-radius: 20px; margin-bottom: 20px; letter-spacing: 1px; text-transform: uppercase; }
.hero-title { font-size: 48px; font-weight: 700; line-height: 1.2; margin-bottom: 20px; text-shadow: 0 2px 10px rgba(0,0,0,0.3); }
.hero-title em { color: var(--accent); font-style: normal; }
.hero-desc { font-size: 18px; color: rgba(255,255,255,0.88); margin-bottom: 36px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.btn-hero-primary { padding: 14px 36px; background: var(--accent); color: var(--white); border-radius: var(--radius); font-size: 16px; font-weight: 600; transition: all var(--transition); }
.btn-hero-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(255,107,0,0.4); }
.btn-hero-secondary { padding: 14px 36px; background: rgba(255,255,255,0.15); color: var(--white); border: 2px solid rgba(255,255,255,0.5); border-radius: var(--radius); font-size: 16px; font-weight: 600; backdrop-filter: blur(4px); transition: all var(--transition); }
.btn-hero-secondary:hover { background: rgba(255,255,255,0.25); border-color: var(--white); }

/* Hero Controls */
.hero-controls { position: absolute; bottom: 32px; left: 80px; z-index: 10; display: flex; gap: 10px; }
.hero-dot { width: 10px; height: 10px; border-radius: 50%; background: rgba(255,255,255,0.4); border: none; transition: all var(--transition); cursor: pointer; }
.hero-dot.active { background: var(--accent); width: 30px; border-radius: 5px; }
.hero-arrow { position: absolute; top: 50%; transform: translateY(-50%); z-index: 10; width: 48px; height: 48px; background: rgba(255,255,255,0.15); border: 2px solid rgba(255,255,255,0.3); border-radius: 50%; color: var(--white); display: flex; align-items: center; justify-content: center; backdrop-filter: blur(4px); transition: all var(--transition); }
.hero-arrow:hover { background: var(--accent); border-color: var(--accent); }
.hero-arrow-prev { left: 24px; }
.hero-arrow-next { right: 24px; }

/* =====================
   CATEGORY NAV BAR
   ===================== */
.category-nav { background: var(--primary); padding: 0; overflow-x: auto; }
.category-nav-inner { display: flex; justify-content: center; }
.category-nav-item {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    padding: 20px 28px; color: rgba(255,255,255,0.75); font-size: 13px; font-weight: 500;
    border-right: 1px solid rgba(255,255,255,0.1); white-space: nowrap; transition: all var(--transition);
    cursor: pointer; text-decoration: none;
}
.category-nav-item svg { opacity: 0.8; }
.category-nav-item:hover,
.category-nav-item.active { color: var(--white); background: rgba(255,255,255,0.1); }
.category-nav-item.active { border-bottom: 3px solid var(--accent); }

/* =====================
   SECTION 通用
   ===================== */
.section { padding: 80px 0; }
.section-light { background: var(--light-gray); }
.section-dark { background: var(--primary); color: var(--white); }
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag { display: inline-block; font-size: 12px; font-weight: 600; color: var(--accent); letter-spacing: 2px; text-transform: uppercase; margin-bottom: 12px; }
.section-title { font-size: 36px; font-weight: 700; color: var(--primary); margin-bottom: 16px; line-height: 1.3; }
.section-dark .section-title { color: var(--white); }
.section-desc { font-size: 16px; color: var(--text-light); max-width: 600px; margin: 0 auto; }
.section-dark .section-desc { color: rgba(255,255,255,0.75); }

/* 分隔线装饰 */
.section-title::after { content: ''; display: block; width: 50px; height: 3px; background: var(--accent); margin: 16px auto 0; border-radius: 2px; }

/* =====================
   PRODUCT CARDS
   ===================== */
.products-section {}
.products-filter { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.filter-btn {
    padding: 8px 24px; border: 2px solid var(--border); border-radius: 30px;
    font-size: 14px; font-weight: 500; color: var(--text-light); background: var(--white);
    transition: all var(--transition); cursor: pointer;
}
.filter-btn:hover { border-color: var(--primary); color: var(--primary); }
.filter-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); }

.products-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.product-card {
    background: var(--white); border-radius: var(--radius-lg); overflow: hidden;
    box-shadow: var(--shadow-sm); border: 1px solid var(--border);
    transition: all var(--transition); position: relative;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card-image {
    position: relative; overflow: hidden; background: var(--light-gray);
    aspect-ratio: 4/3;
}
.product-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.product-card:hover .product-card-image img { transform: scale(1.06); }
.product-badge {
    position: absolute; top: 14px; left: 14px; background: var(--accent);
    color: var(--white); font-size: 11px; font-weight: 700; padding: 4px 12px;
    border-radius: 20px; text-transform: uppercase; letter-spacing: 1px;
}
.product-card-body { padding: 22px; }
.product-category-tag { font-size: 12px; color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 8px; }
.product-card-title { font-size: 17px; font-weight: 700; color: var(--primary); margin-bottom: 10px; line-height: 1.4; }
.product-card-excerpt { font-size: 14px; color: var(--text-light); line-height: 1.6; margin-bottom: 18px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.product-card-sku { font-size: 12px; color: var(--text-muted); margin-bottom: 18px; }
.product-card-footer { display: flex; align-items: center; justify-content: space-between; padding-top: 16px; border-top: 1px solid var(--border); }
.btn-product-detail { padding: 8px 20px; background: var(--primary); color: var(--white); border-radius: var(--radius); font-size: 13px; font-weight: 600; transition: all var(--transition); }
.btn-product-detail:hover { background: var(--primary-light); }
.btn-inquiry { padding: 8px 20px; border: 2px solid var(--accent); color: var(--accent); border-radius: var(--radius); font-size: 13px; font-weight: 600; transition: all var(--transition); }
.btn-inquiry:hover { background: var(--accent); color: var(--white); }

/* Products loading */
.products-loading { text-align: center; padding: 60px; color: var(--text-muted); font-size: 16px; }
.spinner { display: inline-block; width: 36px; height: 36px; border: 3px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; margin-bottom: 12px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* =====================
   ABOUT / INTRO SECTION
   ===================== */
.about-intro { }
.about-intro-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.about-intro-image { position: relative; }
.about-intro-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.about-intro-image::before {
    content: ''; position: absolute; top: -20px; left: -20px; right: 20px; bottom: 20px;
    border: 3px solid var(--accent); border-radius: var(--radius-lg); z-index: -1;
}
.about-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 40px; }
.stat-item { text-align: center; padding: 20px; background: var(--light-gray); border-radius: var(--radius); }
.stat-number { font-size: 36px; font-weight: 800; color: var(--primary); line-height: 1; display: block; }
.stat-number span { color: var(--accent); }
.stat-label { font-size: 13px; color: var(--text-light); margin-top: 6px; }
.about-intro-content .section-header { text-align: left; margin-bottom: 28px; }
.about-intro-content .section-title::after { margin-left: 0; }
.about-features { display: flex; flex-direction: column; gap: 20px; margin-top: 32px; }
.about-feature-item { display: flex; gap: 16px; align-items: flex-start; }
.about-feature-icon { flex-shrink: 0; width: 44px; height: 44px; background: rgba(0,58,112,0.08); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--primary); }
.about-feature-text h4 { font-size: 15px; font-weight: 600; color: var(--primary); margin-bottom: 4px; }
.about-feature-text p { font-size: 14px; color: var(--text-light); }

/* =====================
   SOLUTIONS SECTION
   ===================== */
.solutions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.solution-card {
    position: relative; overflow: hidden; border-radius: var(--radius-lg);
    background: var(--white); box-shadow: var(--shadow-sm); border: 1px solid var(--border);
    transition: all var(--transition);
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.solution-card-image { aspect-ratio: 16/9; overflow: hidden; background: var(--mid-gray); }
.solution-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.solution-card:hover .solution-card-image img { transform: scale(1.06); }
.solution-card-body { padding: 24px; }
.solution-icon { width: 48px; height: 48px; background: rgba(0,58,112,0.08); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--primary); margin-bottom: 16px; }
.solution-card-title { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.solution-card-desc { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* =====================
   STATS BAR
   ===================== */
.stats-bar { background: var(--primary); padding: 56px 0; }
.stats-bar-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
.stats-bar-item { color: var(--white); }
.stats-bar-number { font-size: 48px; font-weight: 800; color: var(--white); line-height: 1; display: block; }
.stats-bar-number em { color: var(--accent); font-style: normal; }
.stats-bar-label { font-size: 14px; color: rgba(255,255,255,0.7); margin-top: 8px; letter-spacing: 1px; }

/* =====================
   CTA SECTION
   ===================== */
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); padding: 80px 0; text-align: center; position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; top: -50%; right: -10%; width: 600px; height: 600px; border-radius: 50%; background: rgba(255,107,0,0.08); }
.cta-title { font-size: 40px; font-weight: 700; color: var(--white); margin-bottom: 16px; }
.cta-desc { font-size: 18px; color: rgba(255,255,255,0.8); margin-bottom: 40px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-cta-primary { padding: 16px 48px; background: var(--accent); color: var(--white); border-radius: var(--radius); font-size: 17px; font-weight: 700; transition: all var(--transition); }
.btn-cta-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,107,0,0.4); }
.btn-cta-secondary { padding: 16px 48px; background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.5); border-radius: var(--radius); font-size: 17px; font-weight: 700; transition: all var(--transition); }
.btn-cta-secondary:hover { background: rgba(255,255,255,0.1); border-color: var(--white); }

/* =====================
   PRODUCT DETAIL PAGE
   ===================== */
.product-detail { padding: 60px 0; }
.product-detail-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; }
.product-detail-gallery { position: sticky; top: 100px; }
.product-main-image { border-radius: var(--radius-lg); overflow: hidden; background: var(--light-gray); aspect-ratio: 4/3; margin-bottom: 16px; }
.product-main-image img { width: 100%; height: 100%; object-fit: cover; }
.product-detail-info {}
.product-detail-category { font-size: 13px; color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; }
.product-detail-title { font-size: 34px; font-weight: 700; color: var(--primary); margin-bottom: 8px; line-height: 1.3; }
.product-detail-sku { font-size: 14px; color: var(--text-muted); margin-bottom: 24px; }
.product-detail-desc { font-size: 16px; color: var(--text-light); line-height: 1.8; margin-bottom: 32px; border-bottom: 1px solid var(--border); padding-bottom: 32px; }
.product-features h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 16px; }
.product-features ul { display: flex; flex-direction: column; gap: 10px; margin-bottom: 32px; }
.product-features li { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; color: var(--text-light); }
.product-features li::before { content: ''; display: inline-block; width: 8px; height: 8px; background: var(--accent); border-radius: 50%; flex-shrink: 0; margin-top: 8px; }
.product-specs { margin-bottom: 32px; }
.product-specs h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 16px; }
.specs-table { width: 100%; border-collapse: collapse; }
.specs-table tr { border-bottom: 1px solid var(--border); }
.specs-table tr:last-child { border-bottom: none; }
.specs-table td { padding: 12px 0; font-size: 14px; }
.specs-table td:first-child { color: var(--text-muted); width: 40%; }
.specs-table td:last-child { color: var(--text); font-weight: 500; }
.product-actions { display: flex; gap: 16px; }
.btn-inquiry-large { flex: 1; padding: 16px; background: var(--accent); color: var(--white); border-radius: var(--radius); font-size: 16px; font-weight: 700; text-align: center; transition: all var(--transition); }
.btn-inquiry-large:hover { background: var(--accent-dark); }
.btn-contact-large { flex: 1; padding: 16px; background: transparent; color: var(--primary); border: 2px solid var(--primary); border-radius: var(--radius); font-size: 16px; font-weight: 700; text-align: center; transition: all var(--transition); }
.btn-contact-large:hover { background: var(--primary); color: var(--white); }

/* =====================
   RELATED PRODUCTS
   ===================== */
.related-products { padding: 60px 0; background: var(--light-gray); }
.related-products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* =====================
   ARCHIVE PAGE
   ===================== */
.archive-hero { background: var(--primary); padding: 60px 0; color: var(--white); text-align: center; }
.archive-hero-title { font-size: 40px; font-weight: 700; margin-bottom: 12px; }
.archive-hero-desc { font-size: 16px; color: rgba(255,255,255,0.75); }
.archive-section { padding: 60px 0; }
.archive-filter { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 48px; }
.archive-filter a { padding: 8px 24px; border: 2px solid var(--border); border-radius: 30px; font-size: 14px; font-weight: 500; color: var(--text-light); transition: all var(--transition); }
.archive-filter a:hover { border-color: var(--primary); color: var(--primary); }
.archive-filter a.current { background: var(--primary); color: var(--white); border-color: var(--primary); }
.archive-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

/* =====================
   ABOUT PAGE
   ===================== */
.page-hero { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); padding: 80px 0; color: var(--white); text-align: center; position: relative; overflow: hidden; }
.page-hero::before { content: ''; position: absolute; inset: 0; background: url('') center/cover; opacity: 0.1; }
.page-hero-title { font-size: 44px; font-weight: 700; margin-bottom: 16px; position: relative; }
.page-hero-desc { font-size: 18px; color: rgba(255,255,255,0.8); max-width: 600px; margin: 0 auto; position: relative; }
.page-breadcrumb { font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 16px; position: relative; }
.page-breadcrumb a { color: rgba(255,255,255,0.8); }
.page-breadcrumb a:hover { color: var(--accent); }

.about-mission { padding: 80px 0; }
.mission-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.mission-card { text-align: center; padding: 40px 28px; border-radius: var(--radius-lg); background: var(--white); box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: all var(--transition); }
.mission-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.mission-card-icon { width: 64px; height: 64px; background: rgba(0,58,112,0.08); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; color: var(--primary); }
.mission-card-title { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.mission-card-desc { font-size: 14px; color: var(--text-light); line-height: 1.7; }

.about-story { padding: 80px 0; background: var(--light-gray); }
.story-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.story-content p { font-size: 16px; color: var(--text-light); line-height: 1.8; margin-bottom: 20px; }
.story-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

/* =====================
   CONTACT PAGE
   ===================== */
.contact-section { padding: 80px 0; }
.contact-inner { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; }
.contact-info {}
.contact-info-title { font-size: 28px; font-weight: 700; color: var(--primary); margin-bottom: 16px; }
.contact-info-desc { font-size: 15px; color: var(--text-light); line-height: 1.7; margin-bottom: 40px; }
.contact-detail { display: flex; flex-direction: column; gap: 24px; margin-bottom: 40px; }
.contact-detail-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-detail-icon { width: 44px; height: 44px; background: rgba(0,58,112,0.08); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--primary); flex-shrink: 0; }
.contact-detail-text h4 { font-size: 15px; font-weight: 600; color: var(--primary); margin-bottom: 4px; }
.contact-detail-text p { font-size: 14px; color: var(--text-light); }

/* Contact Form */
.contact-form-wrap { background: var(--light-gray); padding: 40px; border-radius: var(--radius-lg); }
.contact-form-title { font-size: 24px; font-weight: 700; color: var(--primary); margin-bottom: 28px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.form-group label { font-size: 14px; font-weight: 600; color: var(--text); }
.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px; border: 2px solid var(--border); border-radius: var(--radius);
    font-size: 14px; font-family: var(--font-zh); color: var(--text);
    background: var(--white); transition: border-color var(--transition); outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--primary); }
.form-group textarea { resize: vertical; min-height: 120px; }
.btn-submit { width: 100%; padding: 14px; background: var(--primary); color: var(--white); border-radius: var(--radius); font-size: 16px; font-weight: 700; transition: all var(--transition); }
.btn-submit:hover { background: var(--primary-light); }
.form-success { display: none; background: #e8f5e9; border: 1px solid #a5d6a7; border-radius: var(--radius); padding: 16px; color: #2e7d32; font-size: 15px; margin-top: 16px; text-align: center; }

/* =====================
   FOOTER
   ===================== */
.site-footer { background: #0a1628; color: rgba(255,255,255,0.75); }
.footer-main { padding: 64px 0 48px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 48px; }
.footer-brand {}
.footer-logo { display: flex; flex-direction: column; margin-bottom: 16px; }
.footer-logo .logo-zh { font-size: 22px; font-weight: 700; color: var(--white); letter-spacing: 2px; }
.footer-logo .logo-en { font-size: 11px; font-weight: 500; color: var(--accent); letter-spacing: 3px; font-family: var(--font-en); }
.footer-tagline { font-size: 14px; line-height: 1.7; margin-bottom: 24px; color: rgba(255,255,255,0.6); }
.footer-social { display: flex; gap: 12px; }
.social-link { width: 38px; height: 38px; background: rgba(255,255,255,0.08); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.7); transition: all var(--transition); }
.social-link:hover { background: var(--accent); color: var(--white); }
.footer-col-title { font-size: 15px; font-weight: 700; color: var(--white); margin-bottom: 20px; }
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a { font-size: 14px; color: rgba(255,255,255,0.6); transition: all var(--transition); }
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact-list li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 10px; }
.footer-contact-list li svg { flex-shrink: 0; color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; }
.footer-bottom-inner { display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: rgba(255,255,255,0.4); }

/* =====================
   BREADCRUMB
   ===================== */
.breadcrumb-bar { background: var(--light-gray); border-bottom: 1px solid var(--border); padding: 12px 0; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb-sep { color: var(--border); }
.breadcrumb-current { color: var(--primary); font-weight: 500; }

/* =====================
   RESPONSIVE
   ===================== */
@media (max-width: 1024px) {
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .solutions-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
    .about-intro-inner { grid-template-columns: 1fr; gap: 48px; }
    .about-intro-image::before { display: none; }
    .hero-content { padding-left: 48px; }
    .stats-bar-inner { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .story-inner { grid-template-columns: 1fr; }
    .contact-inner { grid-template-columns: 1fr; }
    .product-detail-inner { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .header-top { display: none; }
    .main-nav { display: none; position: fixed; inset: 0; top: 65px; background: var(--white); z-index: 999; overflow-y: auto; padding: 20px; }
    .main-nav.active { display: block; }
    .nav-menu { flex-direction: column; gap: 0; }
    .nav-menu > li > a { padding: 14px 16px; border-bottom: 1px solid var(--border); }
    .nav-menu .sub-menu { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; background: var(--light-gray); border-radius: 0; padding: 4px 0; }
    .mobile-menu-toggle { display: flex; }
    .hero-section { height: 480px; }
    .hero-content { padding: 0 24px; }
    .hero-title { font-size: 30px; }
    .hero-desc { font-size: 15px; }
    .section { padding: 56px 0; }
    .section-title { font-size: 28px; }
    .products-grid { grid-template-columns: 1fr; }
    .solutions-grid { grid-template-columns: 1fr; }
    .mission-grid { grid-template-columns: 1fr; }
    .related-products-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom-inner { flex-direction: column; gap: 8px; text-align: center; }
    .stats-bar-inner { grid-template-columns: repeat(2, 1fr); }
    .stats-bar-number { font-size: 36px; }
    .form-grid { grid-template-columns: 1fr; }
    .archive-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-controls { left: 24px; }
    .category-nav-item { padding: 14px 18px; font-size: 12px; }
}

@media (max-width: 480px) {
    .products-grid, .archive-grid, .related-products-grid { grid-template-columns: 1fr; }
    .hero-title { font-size: 26px; }
    .cta-title { font-size: 28px; }
    .about-stats { grid-template-columns: 1fr; }
}

/* =====================
   INDUSTRY PAGES
   ===================== */
.industry-scenarios-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.industry-scenario-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: box-shadow var(--transition), transform var(--transition);
}
.industry-scenario-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-3px);
}
.scenario-icon-wrap {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}
.scenario-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}
.scenario-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.75;
    margin-bottom: 20px;
}
.scenario-features {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.scenario-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text);
    font-weight: 500;
}
@media (max-width: 768px) {
    .industry-scenarios-grid { grid-template-columns: 1fr; }
}