/* ========== 全局重置与基础 ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', sans-serif; color: #333; background: #f5f7fa; line-height: 1.6; }
a { text-decoration: none; color: inherit; transition: all 0.3s; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 70px 0; background: #fff; }
.section:nth-child(even) { background: #f5f8fd; }
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag { display: inline-block; color: #1677ff; font-size: 13px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 10px; background: #e8f0ff; padding: 4px 14px; border-radius: 20px; }
.section-title { font-size: 32px; font-weight: 700; color: #1a2a4a; margin-bottom: 14px; }
.section-desc { font-size: 16px; color: #6b7a95; max-width: 560px; margin: 0 auto; }
.section-line { width: 60px; height: 4px; background: linear-gradient(90deg, #1677ff, #36b0ff); border-radius: 2px; margin: 16px auto 0; }

/* ========== 按钮 ========== */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 32px; border-radius: 8px; font-size: 15px; font-weight: 500; cursor: pointer; border: none; transition: all 0.3s; }
.btn-blue { background: linear-gradient(135deg, #1677ff, #36b0ff); color: #fff; }
.btn-blue:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(22,119,255,0.4); }
.btn-outline { background: transparent; color: #1677ff; border: 2px solid #1677ff; }
.btn-outline:hover { background: #1677ff; color: #fff; }
.btn-white { background: #fff; color: #1677ff; box-shadow: 0 4px 15px rgba(0,0,0,0.1); }
.btn-white:hover { background: #f0f5ff; }
.btn-sm { padding: 8px 20px; font-size: 13px; }

/* ========== 导航栏 ========== */
#navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.98); box-shadow: 0 2px 16px rgba(0,0,0,0.08); transition: all 0.4s; }
#navbar.scrolled { background: rgba(255,255,255,1); box-shadow: 0 4px 20px rgba(0,0,0,0.12); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; padding: 0 20px; max-width: 1240px; margin: 0 auto; }
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo-icon { width: 42px; height: 42px; background: linear-gradient(135deg, #1677ff, #36b0ff); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 22px; }
.nav-logo-img { display: flex; align-items: center; }
.nav-logo-img img { height: 40px; width: auto; object-fit: contain; }
.nav-logo-text h1 { color: #1a2a4a; font-size: 18px; font-weight: 700; line-height: 1.2; }
.nav-logo-text p { color: #6b7a95; font-size: 11px; }
.nav-menu { display: flex; align-items: center; gap: 0; }
.nav-item { position: relative; }
.nav-link { display: block; color: #3a4a6a; font-size: 15px; padding: 0 18px; height: 70px; line-height: 70px; transition: color 0.3s; white-space: nowrap; font-weight: 500; }
.nav-link:hover, .nav-link.active { color: #1677ff; }
.nav-link::after { content: ''; position: absolute; bottom: 14px; left: 50%; transform: translateX(-50%) scaleX(0); width: 20px; height: 2px; background: #1677ff; transition: transform 0.3s; border-radius: 1px; }
.nav-link:hover::after, .nav-link.active::after { transform: translateX(-50%) scaleX(1); }
.nav-right { display: flex; align-items: center; gap: 20px; }
.nav-phone { display: flex; align-items: center; gap: 8px; color: #1a2a4a; font-size: 15px; font-weight: 600; }
.nav-phone .phone-icon { width: 32px; height: 32px; background: linear-gradient(135deg, #1677ff, #36b0ff); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: #1a2a4a; margin: 5px 0; transition: all 0.3s; border-radius: 2px; }

/* ========== 英雄轮播 ========== */
.hero { height: 100vh; min-height: 600px; max-height: 900px; position: relative; overflow: hidden; }
.hero-slider { height: 100%; }
.hero-slide { position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0; transition: opacity 0.8s ease; }
.hero-slide.active { opacity: 1; }
.hero-slide-bg { position: absolute; inset: 0; background: linear-gradient(135deg, #0d3070 0%, #1a6fc9 50%, #0a4aa0 100%); }
.hero-slide-bg img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(to right, rgba(10,40,100,0.82) 0%, rgba(10,40,100,0.3) 100%); }
.hero-content { position: relative; z-index: 2; height: 100%; display: flex; align-items: center; padding: 0 40px; max-width: 1240px; margin: 0 auto; }
.hero-text { max-width: 620px; }
.hero-tag { display: inline-flex; align-items: center; gap: 8px; background: rgba(54,176,255,0.2); border: 1px solid rgba(54,176,255,0.4); color: #7dd6ff; padding: 6px 16px; border-radius: 20px; font-size: 13px; margin-bottom: 20px; }
.hero-title { font-size: 52px; font-weight: 800; color: #fff; line-height: 1.15; margin-bottom: 20px; text-shadow: 0 2px 20px rgba(0,0,0,0.3); }
.hero-title span { color: #5ec6ff; }
.hero-subtitle { font-size: 18px; color: rgba(255,255,255,0.82); margin-bottom: 36px; line-height: 1.8; }
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-indicators { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 3; }
.hero-dot { width: 8px; height: 8px; border-radius: 4px; background: rgba(255,255,255,0.4); cursor: pointer; transition: all 0.3s; border: none; }
.hero-dot.active { background: #36b0ff; width: 28px; }
.hero-scroll-hint { position: absolute; bottom: 30px; right: 40px; color: rgba(255,255,255,0.45); font-size: 12px; display: flex; flex-direction: column; align-items: center; gap: 6px; }
.hero-scroll-hint .arrow { width: 20px; height: 20px; border-right: 2px solid rgba(255,255,255,0.45); border-bottom: 2px solid rgba(255,255,255,0.45); transform: rotate(45deg); animation: bounce 1.5s infinite; }
@keyframes bounce { 0%,100%{transform:rotate(45deg) translateY(0)} 50%{transform:rotate(45deg) translateY(5px)} }

/* ========== 数字统计条 ========== */
.stats-bar { background: linear-gradient(135deg, #1677ff 0%, #36b0ff 100%); padding: 36px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat-item { padding: 10px; border-right: 1px solid rgba(255,255,255,0.2); }
.stat-item:last-child { border-right: none; }
.stat-num { font-size: 42px; font-weight: 800; color: #fff; font-family: 'Arial', sans-serif; }
.stat-label { color: rgba(255,255,255,0.9); font-size: 14px; margin-top: 4px; }

/* ========== 产品卡片 ========== */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card { background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 2px 12px rgba(0,0,0,0.07); transition: all 0.35s; border: 1px solid #eef1f8; }
.product-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(22,119,255,0.16); border-color: #b8d4ff; }
.product-card-img { position: relative; height: 200px; overflow: hidden; background: linear-gradient(135deg, #e8f0ff, #d0e4ff); cursor: pointer; }
.product-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.product-card:hover .product-card-img img { transform: scale(1.06); }
.product-card-img .img-placeholder { width: 100%; height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; color: #1677ff; font-size: 13px; }
.product-card-img .img-placeholder .icon { font-size: 40px; opacity: 0.6; }
.product-card-info { padding: 18px 20px 20px; }
.product-card-name { font-size: 16px; font-weight: 600; color: #1a2a4a; margin-bottom: 8px; }
.product-card-desc { font-size: 13px; color: #8a9ab5; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.product-card-more { display: inline-flex; align-items: center; gap: 4px; color: #1677ff; font-size: 13px; margin-top: 12px; font-weight: 500; }
.product-card-more::after { content: '→'; transition: transform 0.2s; }
.product-card:hover .product-card-more::after { transform: translateX(4px); }

/* ========== 核心优势 ========== */
.advantages { background: linear-gradient(160deg, #1a4aa8 0%, #1677ff 50%, #36b0ff 100%) !important; }
.advantages .section-tag { background: rgba(255,255,255,0.15); color: #cfe8ff; }
.advantages .section-title { color: #fff; }
.advantages .section-desc { color: rgba(255,255,255,0.75); }
.advantages .section-line { background: linear-gradient(90deg, rgba(255,255,255,0.6), rgba(255,255,255,0.3)); }
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.adv-card { background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.22); border-radius: 16px; padding: 32px 28px; transition: all 0.35s; }
.adv-card:hover { background: rgba(255,255,255,0.22); border-color: rgba(255,255,255,0.45); transform: translateY(-4px); }
.adv-icon { width: 60px; height: 60px; background: rgba(255,255,255,0.25); border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 26px; margin-bottom: 20px; }
.adv-title { font-size: 18px; font-weight: 600; color: #fff; margin-bottom: 10px; }
.adv-desc { font-size: 14px; color: rgba(255,255,255,0.75); line-height: 1.8; }

/* ========== 解决方案 ========== */
.solutions-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.solution-card { position: relative; border-radius: 12px; overflow: hidden; height: 240px; cursor: pointer; }
.solution-card-bg { position: absolute; inset: 0; background: linear-gradient(135deg, #1a4aa8, #1677ff); }
.solution-card-bg img { width: 100%; height: 100%; object-fit: cover; opacity: 0.65; transition: all 0.4s; }
.solution-card:hover .solution-card-bg img { opacity: 0.45; transform: scale(1.06); }
.solution-card-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(10,40,100,0.88) 0%, transparent 60%); transition: all 0.35s; }
.solution-card:hover .solution-card-overlay { background: linear-gradient(to top, rgba(22,119,255,0.85) 0%, rgba(22,60,160,0.35) 100%); }
.solution-card-content { position: absolute; bottom: 0; left: 0; right: 0; padding: 20px; }
.solution-card-title { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 6px; }
.solution-card-link { color: rgba(255,255,255,0); font-size: 13px; transition: color 0.3s; display: flex; align-items: center; gap: 4px; }
.solution-card:hover .solution-card-link { color: rgba(255,255,255,0.92); }

/* ========== 案例展示 ========== */
.cases-section { background: #f5f8fd !important; }
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card { background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 2px 12px rgba(0,0,0,0.07); transition: all 0.35s; border: 1px solid #eef1f8; }
.case-card:hover { transform: translateY(-5px); box-shadow: 0 16px 40px rgba(22,119,255,0.14); border-color: #b8d4ff; }
.case-card-img { height: 200px; overflow: hidden; position: relative; background: #dbeafe; }
.case-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.case-card:hover .case-card-img img { transform: scale(1.06); }
.case-card-tag { position: absolute; top: 12px; left: 12px; background: rgba(22,119,255,0.9); color: #fff; padding: 4px 10px; border-radius: 4px; font-size: 12px; }
.case-card-info { padding: 20px; }
.case-card-title { font-size: 16px; font-weight: 600; color: #1a2a4a; margin-bottom: 8px; }
.case-card-desc { font-size: 13px; color: #8a9ab5; line-height: 1.7; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.case-card-client { display: flex; align-items: center; gap: 6px; margin-top: 14px; padding-top: 14px; border-top: 1px solid #f0f4ff; font-size: 13px; color: #aab5cc; }

/* ========== CTA横幅 ========== */
.cta-section { background: linear-gradient(135deg, #1255cc 0%, #1677ff 50%, #36b0ff 100%); padding: 70px 0; text-align: center; }
.cta-title { font-size: 36px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.cta-desc { font-size: 17px; color: rgba(255,255,255,0.88); margin-bottom: 36px; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ========== 页脚 ========== */
footer { background: #1a2a4a; color: rgba(255,255,255,0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; padding-bottom: 50px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-brand-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand-logo .icon { width: 44px; height: 44px; background: linear-gradient(135deg, #1677ff, #36b0ff); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 20px; }
.footer-brand-logo h2 { color: #fff; font-size: 18px; }
.footer-brand-desc { font-size: 14px; line-height: 1.9; color: rgba(255,255,255,0.55); margin-bottom: 20px; }
.footer-contact-item { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; font-size: 14px; }
.footer-contact-item .c-icon { width: 20px; flex-shrink: 0; margin-top: 2px; opacity: 0.7; }
.footer-col-title { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 1px solid rgba(255,255,255,0.12); }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.55); transition: color 0.3s; }
.footer-links a:hover { color: #36b0ff; }
.footer-bottom { padding: 20px 0; display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: rgba(255,255,255,0.35); }
.footer-bottom a { color: rgba(255,255,255,0.4); }
.footer-bottom a:hover { color: #36b0ff; }

/* ========== 面包屑/页面Banner ========== */
.page-banner { background: linear-gradient(135deg, #1255cc 0%, #1677ff 60%, #36b0ff 100%); padding: 110px 0 50px; text-align: center; }
.page-banner-title { font-size: 38px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.page-banner-sub { font-size: 16px; color: rgba(255,255,255,0.8); }
.breadcrumb { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 16px; font-size: 14px; color: rgba(255,255,255,0.55); }
.breadcrumb a { color: rgba(255,255,255,0.65); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb-sep { color: rgba(255,255,255,0.35); }

/* ========== 产品筛选 ========== */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 36px; justify-content: center; }
.filter-btn { padding: 9px 22px; border-radius: 25px; border: 1px solid #d8e4f8; background: #fff; color: #5a6880; font-size: 14px; cursor: pointer; transition: all 0.25s; }
.filter-btn:hover { border-color: #1677ff; color: #1677ff; background: #f0f5ff; }
.filter-btn.active { background: linear-gradient(135deg, #1677ff, #36b0ff); border-color: #1677ff; color: #fff; box-shadow: 0 4px 12px rgba(22,119,255,0.3); }

/* ========== 联系我们 ========== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 50px; align-items: start; }
.contact-info-card { background: linear-gradient(160deg, #1255cc, #1677ff); border-radius: 16px; padding: 40px; color: #fff; }
.contact-info-title { font-size: 22px; font-weight: 600; margin-bottom: 8px; }
.contact-info-sub { font-size: 14px; color: rgba(255,255,255,0.7); margin-bottom: 30px; }
.contact-info-item { display: flex; gap: 14px; margin-bottom: 22px; align-items: flex-start; }
.contact-info-item .ci-icon { width: 44px; height: 44px; background: rgba(255,255,255,0.18); border: 1px solid rgba(255,255,255,0.3); border-radius: 10px; display: flex; align-items: center; justify-content: center; font-size: 18px; flex-shrink: 0; }
.contact-info-item .ci-text h4 { font-size: 14px; color: rgba(255,255,255,0.65); margin-bottom: 4px; }
.contact-info-item .ci-text p { font-size: 16px; font-weight: 500; }
.contact-form-card { background: #fff; border-radius: 16px; padding: 40px; box-shadow: 0 8px 30px rgba(0,0,0,0.07); border: 1px solid #eef1f8; }
.contact-form-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 24px; color: #1a2a4a; }
.form-row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 13px; color: #6b7a95; margin-bottom: 6px; }
.form-field input, .form-field textarea, .form-field select { width: 100%; padding: 11px 14px; border: 1px solid #dde5f0; border-radius: 8px; font-size: 14px; outline: none; transition: border-color 0.25s; font-family: inherit; color: #333; background: #fafbfe; }
.form-field input:focus, .form-field textarea:focus { border-color: #1677ff; background: #fff; box-shadow: 0 0 0 3px rgba(22,119,255,0.1); }
.form-field textarea { resize: vertical; }
.submit-btn { width: 100%; padding: 14px; background: linear-gradient(135deg, #1677ff, #36b0ff); color: #fff; border: none; border-radius: 8px; font-size: 16px; font-weight: 600; cursor: pointer; transition: all 0.3s; }
.submit-btn:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(22,119,255,0.4); }

/* ========== 加载更多 ========== */
.load-more { text-align: center; margin-top: 40px; }

/* ========== 空状态 ========== */
.empty-state { text-align: center; padding: 80px 20px; color: #aab5cc; }
.empty-state .icon { font-size: 56px; margin-bottom: 16px; }
.empty-state p { font-size: 16px; }

/* ========== 产品详情页 ========== */
.product-detail-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: start; margin-bottom: 60px; }
.product-detail-gallery { position: relative; }
.product-detail-main-img { width: 100%; height: 420px; border-radius: 16px; overflow: hidden; background: linear-gradient(135deg, #e8f0ff, #d0e4ff); border: 1px solid #dde8ff; }
.product-detail-main-img img { width: 100%; height: 100%; object-fit: cover; }
.product-detail-main-img .img-placeholder { width: 100%; height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; color: #1677ff; }
.product-detail-main-img .img-placeholder .icon { font-size: 64px; opacity: 0.45; }
.product-detail-info { padding-top: 10px; }
.product-detail-cat { display: inline-block; background: #e8f0ff; color: #1677ff; padding: 4px 14px; border-radius: 20px; font-size: 13px; font-weight: 500; margin-bottom: 14px; }
.product-detail-title { font-size: 30px; font-weight: 700; color: #1a2a4a; margin-bottom: 16px; line-height: 1.3; }
.product-detail-desc { font-size: 15px; color: #6b7a95; line-height: 1.9; margin-bottom: 28px; }
.product-detail-params { background: #f5f8fd; border-radius: 12px; padding: 24px; margin-bottom: 28px; border: 1px solid #dde8ff; }
.product-detail-params h4 { font-size: 15px; font-weight: 600; color: #1a2a4a; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 1px solid #dde8ff; }
.param-table { width: 100%; border-collapse: collapse; }
.param-table tr:not(:last-child) td { border-bottom: 1px solid #eef1f8; }
.param-table td { padding: 10px 14px; font-size: 14px; }
.param-table td:first-child { color: #6b7a95; width: 36%; font-weight: 500; background: #f0f5ff; border-radius: 4px; }
.param-table td:last-child { color: #333; }
.product-detail-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.product-detail-content { background: #fff; border-radius: 16px; padding: 40px; border: 1px solid #eef1f8; box-shadow: 0 4px 20px rgba(0,0,0,0.05); }
.product-detail-content h3 { font-size: 22px; font-weight: 700; color: #1a2a4a; margin-bottom: 24px; padding-bottom: 14px; border-bottom: 2px solid #e8f0ff; }
.product-detail-content .content-body { font-size: 15px; color: #555; line-height: 1.9; }
.product-detail-content .content-body img { border-radius: 10px; margin: 20px 0; }
.product-detail-features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 36px; }
.feature-item { background: #f5f8fd; border-radius: 12px; padding: 22px; border: 1px solid #dde8ff; transition: all 0.3s; text-align: center; }
.feature-item:hover { border-color: #1677ff; background: #f0f5ff; transform: translateY(-3px); }
.feature-item .f-icon { font-size: 32px; margin-bottom: 10px; }
.feature-item .f-title { font-size: 14px; font-weight: 600; color: #1a2a4a; margin-bottom: 6px; }
.feature-item .f-desc { font-size: 13px; color: #8a9ab5; line-height: 1.6; }
.related-products-section { background: #f5f8fd; border-radius: 16px; padding: 36px; border: 1px solid #dde8ff; }
.related-products-section h3 { font-size: 20px; font-weight: 700; color: #1a2a4a; margin-bottom: 24px; }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ========== 解决方案卡片图片 4:3 比例 ========== */
.solution-card-img-wrap { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: linear-gradient(135deg, #0d2450, #1a4080); }
.solution-card-img-wrap img { width: 100%; height: 100%; object-fit: contain; object-position: center; transition: transform 0.4s; }
.solution-card-img-wrap:hover img { transform: scale(1.03); }
.solution-card-img-placeholder { width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; font-size: 60px; background: linear-gradient(135deg, #1a4080, #0d2450); }

/* ========== 解决方案页面 ========== */
.solution-detail-card { background: #fff; border-radius: 16px; overflow: hidden; box-shadow: 0 4px 20px rgba(0,0,0,0.07); border: 1px solid #eef1f8; margin-bottom: 30px; transition: all 0.3s; }
.solution-detail-card:hover { box-shadow: 0 12px 40px rgba(22,119,255,0.12); transform: translateY(-3px); }
.solution-detail-inner { display: grid; grid-template-columns: 380px 1fr; }
.solution-detail-img { height: 280px; overflow: hidden; background: linear-gradient(135deg, #dbeafe, #bfdbff); }
.solution-detail-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.solution-detail-card:hover .solution-detail-img img { transform: scale(1.04); }
.solution-detail-info { padding: 34px 36px; }
.solution-num { display: inline-block; background: #e8f0ff; color: #1677ff; width: 36px; height: 36px; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px; margin-bottom: 14px; }
.solution-detail-title { font-size: 22px; font-weight: 700; color: #1a2a4a; margin-bottom: 12px; }
.solution-detail-desc { font-size: 15px; color: #6b7a95; line-height: 1.8; margin-bottom: 20px; }
.solution-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.solution-tag { background: #f0f5ff; color: #1677ff; padding: 4px 12px; border-radius: 20px; font-size: 12px; font-weight: 500; border: 1px solid #c8daff; }
.service-process { margin-top: 60px; }
.process-steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; position: relative; }
.process-steps::before { content: ''; position: absolute; top: 32px; left: 10%; right: 10%; height: 2px; background: linear-gradient(90deg, #1677ff, #36b0ff); z-index: 0; }
.process-step { text-align: center; position: relative; z-index: 1; }
.process-step-num { width: 64px; height: 64px; background: linear-gradient(135deg, #1677ff, #36b0ff); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 24px; margin: 0 auto 16px; box-shadow: 0 4px 16px rgba(22,119,255,0.3); }
.process-step-title { font-size: 14px; font-weight: 600; color: #1a2a4a; margin-bottom: 6px; }
.process-step-desc { font-size: 12px; color: #8a9ab5; line-height: 1.6; padding: 0 10px; }

/* ========== 关于我们页面 ========== */
.about-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 60px; }
.about-img { border-radius: 16px; overflow: hidden; height: 400px; background: linear-gradient(135deg, #e8f0ff, #d0e4ff); }
.about-img img { width: 100%; height: 100%; object-fit: cover; }
.about-content-title { font-size: 30px; font-weight: 700; color: #1a2a4a; margin-bottom: 20px; }
.about-desc { font-size: 15px; color: #6b7a95; line-height: 1.9; margin-bottom: 24px; }
.about-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.about-stat { background: #f5f8fd; border-radius: 12px; padding: 20px; border: 1px solid #dde8ff; text-align: center; }
.about-stat-num { font-size: 36px; font-weight: 800; color: #1677ff; font-family: 'Arial', sans-serif; }
.about-stat-label { font-size: 14px; color: #6b7a95; margin-top: 4px; }
.cert-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 40px; }
.cert-card { background: #fff; border-radius: 12px; padding: 28px 20px; text-align: center; border: 1px solid #dde8ff; box-shadow: 0 2px 10px rgba(0,0,0,0.05); transition: all 0.3s; }
.cert-card:hover { border-color: #1677ff; transform: translateY(-3px); box-shadow: 0 10px 30px rgba(22,119,255,0.12); }
.cert-icon { font-size: 40px; margin-bottom: 14px; }
.cert-name { font-size: 15px; font-weight: 600; color: #1a2a4a; margin-bottom: 6px; }
.cert-desc { font-size: 13px; color: #8a9ab5; line-height: 1.6; }

/* ========== 响应式 ========== */
@media (max-width: 1100px) {
    .products-grid { grid-template-columns: repeat(3, 1fr); }
    .solutions-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
    .product-detail-layout { grid-template-columns: 1fr; gap: 36px; }
    .product-detail-main-img { height: 360px; }
    .solution-detail-inner { grid-template-columns: 300px 1fr; }
    .product-detail-features { grid-template-columns: repeat(3, 1fr); }
    .related-grid { grid-template-columns: repeat(3, 1fr); }
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
    .hero-title { font-size: 38px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .adv-grid { grid-template-columns: repeat(2, 1fr); }
    .cases-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: repeat(2, 1fr); }
    .section-title { font-size: 26px; }
    .solution-detail-inner { grid-template-columns: 1fr; }
    .solution-detail-img { height: 220px; }
    .process-steps { grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .process-steps::before { display: none; }
    .about-hero { grid-template-columns: 1fr; }
    .about-img { height: 260px; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .product-detail-features { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    #navbar { background: rgba(255,255,255,0.98); }
    .nav-menu { display: none; position: fixed; top: 70px; left: 0; right: 0; background: rgba(255,255,255,0.99); box-shadow: 0 8px 20px rgba(0,0,0,0.1); padding: 10px 0 20px; flex-direction: column; gap: 0; }
    .nav-menu.open { display: flex; }
    .nav-link { height: auto; line-height: 1; padding: 14px 24px; border-bottom: 1px solid #f0f4ff; color: #3a4a6a; }
    .nav-link::after { display: none; }
    .nav-right .nav-phone { display: none; }
    .nav-toggle { display: block; }
    .nav-toggle span { background: #1a2a4a; }
    .hero { height: 100svh; min-height: 500px; }
    .hero-title { font-size: 28px; }
    .hero-subtitle { font-size: 15px; }
    .hero-text { padding-right: 0; }
    .hero-content { padding: 0 20px; }
    .section { padding: 50px 0; }
    .products-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .solutions-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .cases-grid { grid-template-columns: 1fr; }
    .adv-grid { grid-template-columns: 1fr; }
    .page-banner-title { font-size: 26px; }
    .page-banner { padding: 90px 0 40px; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
    .cta-title { font-size: 24px; }
    .section-title { font-size: 22px; }
    .form-row-2 { grid-template-columns: 1fr; }
    .process-steps { grid-template-columns: repeat(2, 1fr); }
    .about-stats { grid-template-columns: repeat(2, 1fr); }
    .product-detail-main-img { height: 260px; }
    .product-detail-features { grid-template-columns: 1fr 1fr; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .cert-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .products-grid { grid-template-columns: 1fr; }
    .solutions-grid { grid-template-columns: 1fr; }
    .hero-btns { flex-direction: column; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .stat-num { font-size: 32px; }
    .product-detail-features { grid-template-columns: 1fr; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .cert-grid { grid-template-columns: 1fr; }
    .process-steps { grid-template-columns: 1fr; }
}

/* ========== 首页新闻中心 ========== */
.home-news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.home-news-main { display: block; border-radius: 14px; overflow: hidden; position: relative; height: 380px; box-shadow: 0 4px 20px rgba(0,0,0,0.1); transition: all 0.35s; text-decoration: none; }
.home-news-main:hover { transform: translateY(-5px); box-shadow: 0 16px 40px rgba(22,119,255,0.2); }
.home-news-main-img { position: absolute; inset: 0; background: linear-gradient(135deg, #1a3a6a, #1677ff); }
.home-news-main-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.home-news-main:hover .home-news-main-img img { transform: scale(1.05); }
.home-news-main-overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(10,30,80,0.9) 0%, rgba(10,30,80,0.2) 60%, transparent 100%); }
.home-news-main-info { position: absolute; bottom: 0; left: 0; right: 0; padding: 24px 24px 22px; z-index: 2; }
.home-news-cat { display: inline-block; padding: 3px 10px; background: rgba(22,119,255,0.7); border: 1px solid rgba(54,176,255,0.5); color: #cfe8ff; border-radius: 10px; font-size: 12px; margin-bottom: 8px; }
.home-news-main-title { font-size: 18px; font-weight: 700; color: #fff; line-height: 1.5; margin-bottom: 8px; }
.home-news-main-summary { font-size: 13px; color: rgba(255,255,255,0.7); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 10px; }
.home-news-date { font-size: 12px; color: rgba(255,255,255,0.5); }

.home-news-side { display: flex; flex-direction: column; gap: 14px; }
.home-news-item { display: flex; gap: 14px; background: #fff; border-radius: 10px; overflow: hidden; border: 1px solid #eef1f8; box-shadow: 0 2px 8px rgba(0,0,0,0.05); transition: all 0.3s; text-decoration: none; }
.home-news-item:hover { transform: translateX(4px); box-shadow: 0 6px 20px rgba(22,119,255,0.12); border-color: #b8d4ff; }
.home-news-item-img { width: 110px; flex-shrink: 0; overflow: hidden; background: linear-gradient(135deg, #e8f0ff, #d0e4ff); }
.home-news-item-img img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.3s; }
.home-news-item:hover .home-news-item-img img { transform: scale(1.06); }
.home-news-no-img { width: 100%; height: 100%; min-height: 80px; display: flex; align-items: center; justify-content: center; font-size: 26px; color: #1677ff; opacity: 0.4; }
.home-news-item-info { padding: 14px 16px 14px 0; flex: 1; display: flex; flex-direction: column; justify-content: center; }
.home-news-item-info h4 { font-size: 14px; font-weight: 600; color: #1a2a4a; line-height: 1.5; margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.home-news-item:hover h4 { color: #1677ff; }
.home-news-item-info p { font-size: 12px; color: #8a9ab5; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 6px; }
.home-news-item-info .home-news-date { font-size: 11px; color: #aab0c0; }

@media (max-width: 900px) {
    .home-news-grid { grid-template-columns: 1fr; }
    .home-news-main { height: 260px; }
}
@media (max-width: 600px) {
    .home-news-item-img { width: 80px; }
    .home-news-main-title { font-size: 15px; }
}