/* ===== 基础变量 ===== */
:root {
  --primary: #0a6bc9;
  --primary-2: #054386;
  --accent: #d9251d;
  --accent-2: #e23b2e;
  --gold: #FFC000;
  --gold-2: #e6a800;
  --gold-text: #a9790a;
  --bg: #f5f7fa;
  --bg-alt: #eef2f7;
  --white: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --line: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 36px rgba(15, 23, 42, 0.10);
  --container: 1200px;
  --header-h: 72px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", system-ui, sans-serif;
  color: var(--text); background: var(--white); line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 22px; }

/* ===== 顶部导航 ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--header-h);
  z-index: 100; background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  transition: box-shadow .35s;
}
.site-header.scrolled { box-shadow: 0 8px 24px rgba(15, 23, 42, 0.10); }

.nav-wrap { height: 100%; display: flex; align-items: center; justify-content: space-between; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { display: grid; place-items: center; flex: none; }
.brand-logo { height: 60px; width: auto; max-width: 240px; display: block; }
.brand-text { display: flex; flex-direction: column; line-height: 1.22; }
.brand-text strong { font-size: 18px; color: var(--primary-2); letter-spacing: .5px; }
.brand-text small { font-size: 11px; color: var(--muted); letter-spacing: .3px; }

.nav { display: flex; gap: 26px; }
.nav a {
  position: relative; font-size: 14.5px; color: var(--text); font-weight: 600;
  padding: 6px 0; transition: color .25s;
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -3px; height: 2.5px; width: 0;
  background: linear-gradient(90deg, var(--primary), var(--accent)); border-radius: 2px;
  transition: width .28s;
}
.nav a:hover, .nav a.active { color: var(--primary); }
.nav a:hover::after, .nav a.active::after { width: 100%; }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px; background: none; border: 0;
  cursor: pointer; padding: 8px;
}
.nav-toggle span { width: 24px; height: 2.5px; background: var(--primary-2); border-radius: 2px; transition: .3s; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ===== 通用区块 ===== */
.section { padding: 92px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, #f4f6fb 0%, #eef2f7 100%); }
.section-dark { background: linear-gradient(135deg, #0b1d32, #153456); color: #fff; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; position: relative; }
.section-tag {
  display: inline-block; font-size: 12.5px; letter-spacing: 2.5px; color: var(--primary);
  font-weight: 700; background: rgba(10, 107, 201, 0.08); padding: 5px 14px; border-radius: 999px;
}
.section-head h2 { 
  font-size: clamp(28px, 4vw, 40px); margin: 12px 0 12px; color: var(--primary-2); 
}
.section-head h2::after {
  content: "";
  display: block; width: 50px; height: 3px; margin: 16px auto 0;
  background: linear-gradient(90deg, var(--primary), var(--gold));
  border-radius: 2px;
}
.section-head p { color: var(--muted); font-size: 16px; }
.section-head.light h2 { color: #fff; }
.section-head.light h2::after { background: linear-gradient(90deg, #7ecbff, var(--gold)); }
.section-head.light p { color: #b8c9dc; }
.section-head.light .section-tag { background: rgba(255,255,255,0.12); color: #7ecbff; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 13px 28px; border-radius: 999px; font-size: 15px; font-weight: 600;
  transition: transform .2s, box-shadow .25s, background .25s, border-color .25s; cursor: pointer; border: 0;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-2)); color: #fff;
  box-shadow: 0 10px 24px rgba(10, 107, 201, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(10, 107, 201, 0.45); }
.btn-ghost { background: rgba(255,255,255,0.10); color: #fff; border: 1px solid rgba(255,255,255,0.40); backdrop-filter: blur(4px); }
.btn-ghost:hover { background: rgba(255,255,255,0.22); transform: translateY(-2px); border-color: rgba(255,255,255,0.6); }
.btn-outline { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.btn-sm { padding: 9px 18px; font-size: 13.5px; }

/* ===== 首页横幅 ===== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  color: #fff; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  transform: scale(1.05); transition: transform 8s ease;
}
.hero:hover .hero-bg { transform: scale(1); }
.hero-overlay {
  position: absolute; inset: 0;
  background: 
    linear-gradient(100deg, rgba(5, 30, 65, 0.92) 0%, rgba(5, 30, 65, 0.58) 55%, rgba(5, 30, 65, 0.30) 100%),
    radial-gradient(ellipse at 75% 30%, rgba(10,107,201,0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 20% 80%, rgba(255,192,0,0.08) 0%, transparent 50%);
}
.hero-overlay::after {
  content: "";
  position: absolute; inset: 0;
  background-image: 
    linear-gradient(30deg, rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(-30deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 80px 80px;
  opacity: 0.5;
}
.hero-inner { position: relative; z-index: 2; max-width: 780px; padding-top: calc(var(--header-h) + 28px); }
.hero-title {
  font-size: clamp(38px, 6.5vw, 64px); line-height: 1.18; font-weight: 800; letter-spacing: 1.5px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.25);
}
.hero-accent-line {
  width: 80px; height: 4px; border-radius: 2px;
  background: linear-gradient(90deg, var(--gold), var(--accent));
  margin: 16px 0 28px;
}
.hero-philosophy {
  display: inline-block;
  font-size: 15px; color: #ffe9a8; font-weight: 500;
  background: rgba(255, 192, 0, 0.10);
  border-left: 3px solid var(--gold);
  padding: 12px 20px; border-radius: 6px;
  margin-bottom: 36px; max-width: 640px;
  line-height: 1.7;
}
.hero-philosophy-label {
  color: var(--gold); font-weight: 700; margin-right: 4px;
  letter-spacing: 1px;
}
.hero-subline {
  display: block;
  font-size: clamp(18px, 2.4vw, 22px);
  font-weight: 600;
  background: linear-gradient(90deg, #ffd874, var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.5px;
  margin-top: 16px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== 公司简介 ===== */
.about-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; }
.about-media { position: relative; }
.about-img-main { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.about-img-main img { width: 100%; height: 380px; object-fit: cover; transition: transform .5s; }
.about-img-main:hover img { transform: scale(1.03); }
.about-img-sub {
  position: absolute; right: -24px; bottom: -32px; width: 260px; border-radius: var(--radius-sm);
  overflow: hidden; box-shadow: var(--shadow); border: 5px solid var(--white);
}
.about-img-sub img { width: 100%; height: 170px; object-fit: cover; }
.about-badge {
  position: absolute; left: -18px; top: 24px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff;
  padding: 14px 18px; border-radius: var(--radius-sm); 
  box-shadow: 0 10px 24px rgba(217, 37, 29, 0.30); z-index: 2;
}
.about-badge strong { display: block; font-size: 20px; }
.about-badge span { font-size: 12px; opacity: .9; }

.about-text h2 { font-size: clamp(26px, 3.4vw, 36px); color: var(--primary-2); margin: 10px 0 18px; }
.about-text p:not(.about-tagline) { margin-bottom: 16px; color: #374151; font-size: 15.5px; text-indent: 2em; }
.about-text strong { color: var(--accent); }
.about-tagline {
  font-size: 16px !important;
  font-weight: 600;
  color: var(--primary-2) !important;
  border-left: 3px solid var(--gold);
  padding-left: 14px;
  background: linear-gradient(90deg, rgba(255,192,0,0.06), transparent);
  padding: 12px 14px;
  border-radius: 0 6px 6px 0;
}
.about-list { list-style: none; display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; margin-top: 22px; }
.about-list li {
  position: relative; padding-left: 22px; font-size: 14.5px; color: #4b5563;
}
.about-list li::before {
  content: ""; position: absolute; left: 0; top: 9px; width: 10px; height: 10px;
  border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--accent));
}

/* ===== 核心优势 ===== */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.adv-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 28px; box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06); 
  transition: transform .3s, box-shadow .3s, border-color .3s;
  position: relative; overflow: hidden;
}
.adv-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0); transform-origin: left;
  transition: transform .35s ease;
}
.adv-card:hover::before { transform: scaleX(1); }
.adv-card:hover { 
  transform: translateY(-6px); 
  box-shadow: 0 20px 44px rgba(15, 23, 42, 0.13); 
  border-color: #c8d6e5;
}
.adv-icon {
  width: 60px; height: 60px; border-radius: 16px; display: grid; place-items: center;
  font-size: 30px; background: linear-gradient(135deg, #e8f3ff, #d6eaff); margin-bottom: 18px;
  transition: transform .3s;
}
.adv-card:hover .adv-icon { transform: scale(1.08); }
.adv-card h3 { font-size: 19px; color: var(--primary-2); margin-bottom: 8px; }
.adv-card p { font-size: 14.5px; color: var(--muted); }

/* ===== 产品中心 ===== */
.product-block { margin-bottom: 64px; }
.product-block-head {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  margin-bottom: 14px;
}
.product-block-head h3 { font-size: 24px; color: var(--primary-2); }
.product-slogan { color: var(--accent); font-weight: 600; font-size: 15px; margin-top: 4px; }
.product-desc { color: #4b5563; font-size: 15px; margin-bottom: 24px; max-width: 900px; }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.unshaped-grid { grid-template-columns: repeat(3, 1fr); }
.product-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06); 
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.product-card:hover { 
  transform: translateY(-5px); 
  box-shadow: 0 20px 44px rgba(15, 23, 42, 0.13); 
  border-color: #c8d6e5;
}
.product-card.wide { display: flex; flex-direction: column; }
.product-img { height: 170px; overflow: hidden; background: var(--bg-alt); position: relative; }
.product-img::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(5,30,65,0.15));
  opacity: 0; transition: opacity .3s;
}
.product-card:hover .product-img::after { opacity: 1; }
.product-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s; }
.product-card:hover .product-img img { transform: scale(1.07); }
.product-card h4 { font-size: 17px; color: var(--primary-2); padding: 18px 18px 6px; }
.product-body p { padding: 0 18px 18px; font-size: 13.5px; color: var(--muted); }
.product-models {
  list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 0 18px 14px;
}
.product-models li {
  font-size: 12.5px; font-weight: 600; color: var(--primary);
  background: rgba(10, 107, 201, 0.08); padding: 4px 10px; border-radius: 6px;
}
.product-card-tip {
  padding: 0 18px 16px; font-size: 12px; color: var(--muted); font-style: italic;
}

/* 技术指标 - 数据化表格 */

/* ===== 业绩案例 ===== */
.table-scroll { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); }
.cases-table {
  width: 100%; min-width: 900px; border-collapse: collapse; background: #fff;
  font-size: 14px;
}
.cases-table th, .cases-table td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.cases-table th { background: var(--primary-2); color: #fff; font-weight: 600; white-space: nowrap; }
.cases-table tbody tr:hover { background: #f8fafc; }
.cases-table td:nth-child(1) { width: 46px; text-align: center; color: var(--primary); font-weight: 700; }
.cases-table td:nth-child(6) { white-space: nowrap; color: var(--muted); }
.cases-note { font-size: 13px; color: var(--muted); margin-top: 14px; }

/* ===== 数据化技术指标表 ===== */
.spec-data-block {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; box-shadow: var(--shadow); margin-bottom: 24px;
}
.spec-data-block h3 { font-size: 18px; color: var(--primary-2); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.spec-data-block h3 .badge-gold { font-size: 11px; background: var(--gold); color: #1a1a1a; padding: 2px 8px; border-radius: 4px; font-weight: 700; }
.wrj90-spec-img {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 18px;
  text-align: center;
}
.wrj90-spec-img img {
  max-width: 100%;
  height: auto;
  display: inline-block;
}
.spec-data-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.spec-data-table th, .spec-data-table td { padding: 10px 12px; border: 1px solid var(--line); text-align: center; vertical-align: middle; }
.spec-data-table thead th { background: var(--primary-2); color: #fff; font-weight: 600; white-space: nowrap; }
.spec-data-table tbody tr:hover { background: #f0f5ff; }
.spec-data-table tbody td:first-child { font-weight: 700; color: var(--primary); text-align: left; }
.spec-data-table .unit-row th { background: #e8f0fa; color: var(--text); font-size: 12px; font-weight: 500; }

/* ===== 视频展示 ===== */
.video-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06); 
  transition: transform .3s, box-shadow .3s;
}
.video-item:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(15, 23, 42, 0.12); }
.video-item video {
  width: 100%; display: block; background: #000;
  max-height: 360px; object-fit: contain;
}
.video-caption {
  padding: 12px 16px; font-size: 14px; color: var(--muted); font-weight: 500;
}

/* ===== 炉窑调查图库 ===== */
.survey-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.survey-item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: 0 4px 16px rgba(15, 23, 42, 0.06); 
  transition: transform .3s, box-shadow .3s;
  margin: 0;
}
.survey-item:hover { transform: translateY(-4px); box-shadow: 0 16px 36px rgba(15, 23, 42, 0.12); }
.survey-item img {
  width: 100%; height: 200px; object-fit: cover; transition: transform .5s;
}
.survey-item:hover img { transform: scale(1.05); }
.survey-item figcaption {
  padding: 12px 16px; font-size: 14px; color: var(--muted); font-weight: 500;
  text-align: center;
}

/* ===== 服务专业化标语 ===== */

/* ===== 联系我们 ===== */
.contact-grid { display: flex; justify-content: center; }
.contact-info { max-width: 720px; width: 100%; display: flex; flex-direction: column; gap: 20px; }
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0; box-shadow: var(--shadow); overflow: hidden;
}
.contact-card h3 { font-size: 18px; color: var(--primary-2); margin-bottom: 14px; }

/* 卡片（新结构：主营业务 / 联系方式 两个独立 section） */
.branch-card { padding: 0; overflow: hidden; }
.branch-divider {
  margin: 4px 32px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
}
.branch-contact { padding: 0 32px 28px; }

.contact-list { list-style: none; }
.contact-list li {
  display: flex; gap: 10px; padding: 12px 0; border-bottom: 1px solid var(--line);
  transition: background .2s;
}
.contact-list li:last-child { border-bottom: 0; }
.contact-list strong { flex: none; width: 100px; font-size: 13px; color: var(--primary); font-weight: 600; letter-spacing: 0.3px; }
.contact-list span { font-size: 14.5px; color: var(--text); }
.contact-list.compact strong { width: 100px; }

/* ===== 页脚 ===== */
.site-footer { 
  background: linear-gradient(180deg, #091a30, #0b1d32); 
  color: #c8d8e8; padding-top: 56px; 
}
.footer-wrap { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; padding-bottom: 40px; }
.footer-brand strong { font-size: 20px; color: #fff; letter-spacing: 0.5px; }
.footer-brand p { font-size: 14px; margin-top: 6px; }
.footer-brand .footer-addr { color: #94a3b8; font-size: 13px; }
.footer-nav { display: flex; gap: 26px; flex-wrap: wrap; }
.footer-nav a { 
  font-size: 14px; color: #c8d8e8; transition: color .25s; 
  position: relative;
}
.footer-nav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1.5px; width: 0;
  background: var(--gold); transition: width .25s;
}
.footer-nav a:hover { color: var(--gold); }
.footer-nav a:hover::after { width: 100%; }
.footer-bottom { 
  border-top: 1px solid rgba(255,255,255,0.08); 
  padding: 18px 0; font-size: 13px; color: #8fa3b8; 
}
.footer-bottom .container { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.footer-bottom a { color: #aebfd0; text-decoration: none; }
.footer-bottom a:hover { color: #ffffff; text-decoration: underline; }

/* ===== 滚动揭示动画 ===== */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 1080px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-img-sub { right: 12px; bottom: -20px; width: 220px; }
  .contact-info { max-width: 100%; }
}

@media (max-width: 860px) {
  .product-grid, .unshaped-grid { grid-template-columns: repeat(2, 1fr); }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .about-list { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .survey-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-philosophy { font-size: 14.5px; padding: 10px 16px; }
  .section-head { margin-bottom: 40px; }
}

@media (max-width: 720px) {
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; gap: 0; background: #fff; border-bottom: 1px solid var(--line);
    transform: translateY(-130%); transition: transform .32s ease; padding: 8px 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }
  .nav.open { transform: translateY(0); box-shadow: 0 14px 30px rgba(15, 23, 42, 0.12); }
  .nav a { padding: 14px 22px; border-bottom: 1px solid var(--line); font-size: 15px; }
  .nav a::after { display: none; }
  .nav-toggle { display: flex; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; }
  .section { padding: 56px 0; }
  .about-img-sub { display: none; }
  .about-img-main img { height: 240px; }
  .about-badge { left: 12px; top: 12px; padding: 10px 14px; font-size: 13px; }
  .about-badge strong { font-size: 16px; }
  .product-grid, .unshaped-grid, .adv-grid, .survey-grid { grid-template-columns: 1fr; }
  .product-block-head { flex-direction: column; align-items: flex-start; }
  .contact-list li { flex-direction: column; gap: 4px; }
  .contact-list strong { width: auto; }
  .hero { min-height: auto; padding-top: calc(var(--header-h) + 60px); padding-bottom: 60px; }
  .hero-title { font-size: 30px !important; }
  .hero-subline { font-size: 16px !important; }
  .hero-actions .btn { font-size: 14px; padding: 11px 22px; }
  .hero-philosophy { max-width: 100%; }
  .hero-overlay::after { display: none; }
  .brand-logo { height: 50px; }
  .spec-data-block { padding: 20px 16px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .spec-data-table { font-size: 12px; min-width: 540px; }
  .strength-card { padding: 24px 16px; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .strength-table { font-size: 12px; min-width: 460px; }
  .careers-banner { padding: 36px 22px; }
  .careers-cols { grid-template-columns: 1fr; }
  .business-block { flex-direction: column; align-items: stretch; gap: 8px; }
  .business-tag { min-width: 0; text-align: left; align-self: flex-start; }
  .careers-cta { font-size: 16px; padding: 14px 24px; width: 100%; }
  .careers-quote { font-size: 15px; }
  .gallery-title { font-size: 18px; display: flex; align-items: center; }
  .gallery-title::before { display: inline-block; width: 6px; height: 18px; margin-right: 10px; flex: none; }
  .gallery-sub { margin-left: 0; padding-left: 16px; border-left: 2px solid rgba(255,192,0,0.5); font-size: 13px; }
  .research-intro { padding: 0 8px; }
  .research-lead { font-size: 14.5px; line-height: 1.85; }
  .research-matrix-title { font-size: 18px; }
  .product-img { height: 200px; }
  .gallery-item img { height: 180px; }
  .footer-wrap { flex-direction: column; gap: 24px; }
  .footer-bottom .container { font-size: 12px; gap: 8px; justify-content: center; text-align: center; }
  .footer-nav { gap: 18px; justify-content: center; }
  .footer-brand { text-align: center; }
  .footer-brand p { max-width: 100%; }
  .about-tagline { font-size: 15px !important; padding: 10px 14px !important; }
  .strength-card, .research-item { backdrop-filter: none; }
}

@media (max-width: 540px) {
  .strength-table { min-width: 380px; font-size: 11.5px; }
  .strength-table th, .strength-table td { padding: 8px 10px; }
  .strength-title { font-size: 17px; }
  .strength-conclusion { font-size: 14px; padding: 14px 16px; }
  .cases-table { font-size: 12.5px; }
  .cases-table th, .cases-table td { padding: 10px 12px; }
  .branch-section { padding: 22px 18px; }
  .branch-section-title { font-size: 16px; }
  .business-content { font-size: 13.5px; }
  .research-item { padding: 22px 18px; }
  .research-item-head h4 { font-size: 15px; }
  .research-list { font-size: 13px; }
  .careers-quote { font-size: 14.5px; padding: 18px 0; }
  .contact-list strong { font-size: 12px; }
  .contact-list span { font-size: 14px; }
  .wrj90-spec-img { padding: 10px; }
  .strength-table { background: transparent; }
}

@media (max-width: 460px) {
  .brand-text small { display: none; }
  .brand-logo { height: 46px; }
  .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1; font-size: 13px; padding: 11px 16px; }
  .survey-grid { grid-template-columns: 1fr; }
  .hero-accent-line { width: 56px; height: 3px; margin: 14px 0 20px; }
  .hero-philosophy { font-size: 14px; padding: 11px 16px; }
  .section-head h2 { font-size: 24px !important; }
  .section-tag { font-size: 11px; padding: 4px 12px; }
  .container { padding: 0 16px; }
  .brand-text strong { font-size: 16px; }
  .brand-text { line-height: 1.3; }
  .product-models li { font-size: 11.5px; padding: 3px 8px; }
  .spec-data-table th, .spec-data-table td { padding: 8px 10px; }
}

/* ===== 研发实验 ===== */
.research-intro { max-width: 820px; margin: 0 auto 48px; text-align: center; }
.research-lead { font-size: 16px; color: #d8e6f5; line-height: 1.9; }
.research-lead strong { color: var(--gold); }

.strength-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(126,203,255,0.20);
  border-radius: var(--radius);
  padding: 36px 32px;
  margin-bottom: 48px;
  backdrop-filter: blur(6px);
}
.strength-title {
  font-size: 20px; color: var(--gold); margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px;
}
.strength-title::before {
  content: "▍"; color: var(--accent); font-size: 24px;
}
.strength-table { background: rgba(255,255,255,0.05); }
.strength-table thead th { background: rgba(126,203,255,0.15); color: #fff; }
.strength-table tbody td { color: #e8eef5; border-color: rgba(255,255,255,0.08); }
.strength-table tbody tr:nth-child(3) td { background: rgba(255,192,0,0.10); }
.strength-table tbody td:first-child { color: #fff; }
.strength-bad { color: #ff7e7e; font-weight: 700; }
.strength-warn { color: #ffc54a; font-weight: 700; }
.strength-good { color: #4ade80; font-weight: 700; font-size: 16px; }
.strength-conclusion {
  margin-top: 20px; padding: 18px 22px;
  background: linear-gradient(90deg, rgba(255,192,0,0.10), rgba(255,192,0,0.02));
  border-left: 3px solid var(--gold);
  border-radius: 6px;
  color: #ffe9a8; font-size: 15px; line-height: 1.8;
}
.strength-conclusion strong { color: var(--gold); }

.research-matrix-title {
  font-size: 22px; color: #fff; text-align: center; margin-bottom: 28px;
}
.research-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
.research-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: transform .3s, border-color .3s;
}
.research-item:hover {
  transform: translateY(-4px);
  border-color: rgba(126,203,255,0.30);
}
.research-item-head { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.research-num {
  flex: none;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--gradient-accent, linear-gradient(135deg, var(--gold), var(--accent)));
  color: #fff; font-weight: 800; font-size: 16px;
  display: grid; place-items: center;
  box-shadow: 0 6px 16px rgba(255,192,0,0.3);
}
.research-item-head h4 { font-size: 16px; color: #fff; font-weight: 700; }
.research-list { list-style: none; font-size: 13.5px; color: #b8c9dc; line-height: 1.8; }
.research-list li { padding-left: 16px; position: relative; margin-bottom: 6px; }
.research-list li::before {
  content: ""; position: absolute; left: 0; top: 10px;
  width: 6px; height: 6px; border-radius: 50%; background: #94a3b8;
}
.research-list li.hi { color: var(--gold); }
.research-list li.hi::before { background: var(--gold); box-shadow: 0 0 6px var(--gold); }
.research-list li strong { color: #fff; }

@media (max-width: 860px) {
  .research-grid { grid-template-columns: 1fr; }
}

/* ===== 研发实验 · 图库 ===== */
.research-gallery {
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px dashed rgba(255,255,255,0.12);
}
.gallery-title {
  font-size: 22px; color: #fff; font-weight: 700;
  margin-bottom: 8px;
  display: inline-block;
}
.gallery-title::before {
  content: ""; display: inline-block; width: 8px; height: 22px;
  background: linear-gradient(180deg, var(--gold), var(--accent));
  border-radius: 2px; margin-right: 10px;
  vertical-align: middle;
}
.gallery-sub {
  color: #94a3b8; font-size: 14px; margin: 0 0 22px 18px;
}
.gallery-grid {
  display: grid; gap: 16px;
}
.gallery-grid.gallery-2 { grid-template-columns: repeat(2, 1fr); }
.gallery-grid.gallery-3 { grid-template-columns: repeat(3, 1fr); }
.gallery-grid.gallery-4 { grid-template-columns: repeat(4, 1fr); }
.gallery-item {
  margin: 0;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .3s, border-color .3s;
}
.gallery-item:hover {
  transform: translateY(-3px);
  border-color: rgba(126,203,255,0.35);
}
.gallery-item img {
  width: 100%; height: 200px; object-fit: cover; display: block;
  background: #1a2a40;
}
.gallery-item figcaption {
  padding: 12px 14px;
  font-size: 13px;
  color: #c8d8e8;
  text-align: center;
  background: rgba(255,255,255,0.03);
  border-top: 1px solid rgba(255,255,255,0.06);
}

@media (max-width: 860px) {
  .gallery-grid.gallery-3, .gallery-grid.gallery-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
  .gallery-grid.gallery-2,
  .gallery-grid.gallery-3,
  .gallery-grid.gallery-4 { grid-template-columns: 1fr; }
  .gallery-item img { height: 180px; }
}

/* ===== 铁口浇注跟踪视频 ===== */
.iron-notch-videos { margin-top: 48px; }
.caption-tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 12px; font-weight: 700;
  border-radius: 4px;
  margin-right: 8px;
}
.caption-tag.before { background: rgba(217,37,29,0.15); color: #ff7e7e; }
.caption-tag.after { background: rgba(74,222,128,0.15); color: #4ade80; }
.video-caption { padding: 12px 16px !important; font-size: 14px !important; }

/* ===== 联系我们板块 ===== */
.branch-section { padding: 28px 32px; }
.branch-section-title {
  font-size: 18px; color: var(--primary-2); font-weight: 700;
  margin-bottom: 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--line);
  position: relative;
}
.branch-section-title::after {
  content: "";
  position: absolute; bottom: -2px; left: 0;
  width: 40px; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--gold));
}
.business-block {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}
.business-block:last-child { border-bottom: 0; }
.business-tag {
  flex: none;
  min-width: 132px;
  padding: 5px 12px;
  background: linear-gradient(135deg, rgba(10,107,201,0.10), rgba(255,192,0,0.10));
  border: 1px solid rgba(10,107,201,0.20);
  border-radius: 6px;
  color: var(--primary-2);
  font-size: 13px; font-weight: 700;
  text-align: center;
}
.business-content {
  flex: 1; margin: 0;
  font-size: 14.5px; color: var(--text); line-height: 1.7;
}
.contact-highlight {
  color: var(--accent); font-weight: 700; font-size: 15.5px;
}
.contact-link {
  color: var(--primary); font-weight: 600; font-size: 15px;
  transition: color .2s;
  word-break: break-all;
}
.contact-link:hover { color: var(--accent); }

/* ===== 招贤纳士 ===== */
.careers-section {
  background: linear-gradient(135deg, var(--primary-2), #0d355e);
  color: #fff;
}
.careers-banner {
  background: linear-gradient(180deg, rgba(255,192,0,0.06), rgba(10,107,201,0.06));
  border: 1px solid rgba(255,192,0,0.18);
  border-radius: var(--radius);
  padding: 60px 48px;
  position: relative;
  overflow: hidden;
}
.careers-banner::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 30%, rgba(255,192,0,0.10), transparent 60%),
              radial-gradient(circle at 20% 80%, rgba(10,107,201,0.20), transparent 60%);
  pointer-events: none;
}
.careers-head { position: relative; text-align: center; margin-bottom: 36px; }
.careers-head .section-tag { background: rgba(255,192,0,0.15); color: var(--gold); }
.careers-head h2 {
  font-size: clamp(28px, 4vw, 38px);
  margin: 14px 0 10px;
  color: var(--gold); font-weight: 800;
  letter-spacing: 1px;
}
.careers-sub { font-size: 16px; color: #d8e6f5; }
.careers-content { position: relative; }
.careers-cols {
  display: grid; grid-template-columns: 1fr 2fr; gap: 24px;
  margin-bottom: 32px;
}
.careers-col {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
}
.careers-label {
  font-size: 12px; font-weight: 700;
  color: var(--gold); letter-spacing: 2px;
  margin-bottom: 8px;
}
.careers-value { font-size: 16px; color: #fff; font-weight: 500; }
.careers-quote {
  font-size: 16px; color: #e0eaf5; line-height: 1.9;
  text-align: center;
  padding: 24px 0;
  border-top: 1px dashed rgba(255,255,255,0.18);
  border-bottom: 1px dashed rgba(255,255,255,0.18);
  margin-bottom: 32px;
}
.careers-cta {
  display: inline-flex; flex-direction: column; align-items: center; gap: 6px;
  padding: 16px 36px;
  background: linear-gradient(135deg, var(--gold), var(--gold-2));
  color: var(--primary-2);
  border-radius: 999px;
  font-size: 18px; font-weight: 700;
  transition: transform .25s, box-shadow .25s;
  box-shadow: 0 10px 28px rgba(255,192,0,0.30);
}
.careers-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(255,192,0,0.45);
}
.careers-cta-tip { font-size: 13px; color: var(--primary-2); opacity: 0.7; font-weight: 500; }

@media (max-width: 720px) {
  .careers-banner { padding: 36px 22px; }
  .careers-cols { grid-template-columns: 1fr; }
  .business-block { flex-direction: column; gap: 6px; }
  .business-tag { align-self: flex-start; }
  .branch-section { padding: 22px 18px; }
}