/* ========================================
   新鼎龙铝型材官网 - 主样式表
   现代B2B工业风格 | 传统线性布局 | 全端响应式
   ======================================== */

/* ---------- CSS 变量 ---------- */
:root {
  --pri: #2C3E50;
  --pri-light: #3D5060;
  --accent: #E67E22;
  --accent-dark: #D4701A;
  --silver: #95A5A6;
  --white: #FFFFFF;
  --bg: #F8F9FA;
  --text: #2C3E50;
  --text-secondary: #5D6D7E;
  --text-muted: #95A5A6;
  --border: #E0E3E8;
  --shadow: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --radius: 8px;
  --tr: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --container: 1200px;
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: "PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color: var(--text); line-height: 1.7; overflow-x: hidden; background: var(--white);
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
table { border-collapse: collapse; }

/* ---------- 通用布局 ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 32px; }
.section-padding { padding: 80px 0; }

/* ---------- 标题组件 ---------- */
.section-header { text-align: center; margin-bottom: 48px; }
.section-title {
  font-size: 2rem; font-weight: 700; color: var(--text);
  letter-spacing: 2px; margin-bottom: 10px;
}
.section-subtitle { font-size: 15px; color: var(--text-secondary); letter-spacing: 1px; }

/* ---------- 按钮 ---------- */
.btn-cta {
  display: inline-block; padding: 14px 36px; font-size: 15px; font-weight: 600;
  color: #fff; background: var(--accent); border: none; border-radius: 6px;
  cursor: pointer; letter-spacing: 1px; transition: all 0.2s ease;
  text-align: center; font-family: inherit;
}
.btn-cta:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(230,126,34,0.3); }
.btn-outline {
  display: inline-block; padding: 14px 36px; font-size: 15px; font-weight: 600;
  color: var(--pri); background: transparent; border: 2px solid var(--pri);
  border-radius: 6px; cursor: pointer; letter-spacing: 1px; transition: all 0.2s ease;
  text-align: center; font-family: inherit;
}
.btn-outline:hover { background: var(--pri); color: #fff; transform: translateY(-2px); }
.btn-ghost {
  display: inline-block; padding: 14px 36px; font-size: 15px; font-weight: 600;
  color: #fff; background: transparent; border: 2px solid rgba(255,255,255,0.6);
  border-radius: 6px; cursor: pointer; letter-spacing: 1px; transition: all 0.2s ease;
  text-align: center; font-family: inherit;
}
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-2px); }
.btn-dark {
  display: inline-block; padding: 14px 36px; font-size: 15px; font-weight: 600;
  color: #fff; background: var(--pri); border: none; border-radius: 6px;
  cursor: pointer; letter-spacing: 1px; transition: all 0.2s ease;
  text-align: center; font-family: inherit;
}
.btn-dark:hover { background: var(--pri-light); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(44,62,80,0.3); }
.btn-sm { padding: 10px 22px; font-size: 13px; }

/* ---------- PC 导航 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000; height: 80px;
  background: var(--pri); border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: all var(--tr);
}
.header.scrolled { box-shadow: 0 4px 20px rgba(0,0,0,0.25); }
.nav-inner {
  max-width: var(--container); margin: 0 auto; padding: 0 32px; height: 80px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo { flex-shrink: 0; display: flex; align-items: center; gap: 8px; }
.logo img { height: 38px; width: auto; }
.logo .brand-name { font-size: 16px; font-weight: 700; color: #fff; white-space: nowrap; line-height: 1; }

.nav { display: flex; gap: 4px; align-items: center; }
.nav > li > a {
  display: block; padding: 10px 16px; color: rgba(255,255,255,0.72); font-size: 14px;
  font-weight: 500; transition: all var(--tr); border-radius: 6px; white-space: nowrap;
  position: relative;
}
.nav > li > a::after {
  content: ''; position: absolute; bottom: 4px; left: 50%; transform: translateX(-50%) scaleX(0);
  width: 20px; height: 2px; background: var(--accent); border-radius: 1px;
  transition: transform var(--tr);
}
.nav > li > a:hover,
.nav > li > a.active { color: #fff; }
.nav > li > a:hover::after,
.nav > li > a.active::after { transform: translateX(-50%) scaleX(1); }

.nav .btn-inquiry {
  margin-left: 12px; padding: 9px 22px; font-size: 13px; font-weight: 600;
  color: #fff; background: var(--accent); border: none; border-radius: 6px;
  cursor: pointer; transition: all 0.2s ease; font-family: inherit;
}
.nav .btn-inquiry:hover { background: var(--accent-dark); transform: translateY(-1px); }

/* ---------- Hero 区 ---------- */
.hero {
  position: relative; height: 600px; display: flex;
  align-items: center; justify-content: center; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center; background-repeat: no-repeat;
}
.hero::after {
  content: ''; position: absolute; inset: 0;
  background: rgba(0,0,0,0.50);
}
.hero-content {
  position: relative; z-index: 2; text-align: center; max-width: 800px;
  padding: 0 32px;
}
.hero-content h1 {
  font-size: 3.2rem; font-weight: 800; color: #fff; letter-spacing: 4px;
  line-height: 1.3; margin-bottom: 20px;
}
.hero-content p {
  font-size: 1.15rem; color: rgba(255,255,255,0.8); letter-spacing: 2px;
  margin-bottom: 40px; font-weight: 300;
}
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------- 优势卡片 ---------- */
.advantage-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.advantage-card {
  position: relative; padding: 48px 28px 36px; background: var(--bg);
  border-radius: 12px; box-shadow: none;
  transition: all var(--tr); overflow: visible; text-align: center;
}
.advantage-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.advantage-card .adv-icon {
  display: flex; align-items: center; justify-content: center;
  width: 64px; height: 64px; border-radius: 50%; margin: 0 auto 24px;
  background: var(--pri); transition: all var(--tr);
}
.advantage-card .adv-icon svg { width: 30px; height: 30px; }
.advantage-card:hover .adv-icon { background: var(--accent); transform: scale(1.08); }
.advantage-card .adv-stat {
  display: block; font-size: 2rem; font-weight: 800; color: var(--accent);
  line-height: 1.1; margin-bottom: 10px;
}
.advantage-card h3 { font-size: 17px; color: var(--text); margin-bottom: 10px; font-weight: 600; }
.advantage-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ---------- 产品卡片 ---------- */
.product-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.product-card {
  background: var(--white); border-radius: 12px; overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--tr); text-align: center;
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.product-card .card-img { height: 256px; overflow: hidden; }
.product-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.product-card:hover .card-img img { transform: scale(1.08); }
.product-card .card-body { padding: 20px 18px; }
.product-card .card-cat {
  display: inline-block; font-size: 11px; color: var(--accent); background: rgba(230,126,34,0.08);
  padding: 2px 10px; border-radius: 3px; margin-bottom: 8px; font-weight: 500;
}
.product-card .card-name { display: block; font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.product-card .card-meta { font-size: 12px; color: var(--text-muted); margin-bottom: 14px; }
.product-card .btn-sm { margin-bottom: 4px; }

/* ---------- 应用场景卡片 ---------- */
.scene-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.scene-item {
  position: relative; border-radius: 12px; overflow: hidden;
  aspect-ratio: 1/1; cursor: pointer; box-shadow: var(--shadow);
}
.scene-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.scene-item:hover img { transform: scale(1.08); }
.scene-label {
  position: absolute; bottom: 0; left: 0; right: 0; padding: 16px;
  background: linear-gradient(transparent, rgba(0,0,0,0.78));
  color: #fff; font-size: 15px; font-weight: 600; letter-spacing: 1px;
}

/* ---------- 案例卡片 ---------- */
.case-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.case-card {
  background: var(--white); border-radius: 12px; overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--tr);
}
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.case-card .case-img { height: 220px; overflow: hidden; }
.case-card .case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.case-card:hover .case-img img { transform: scale(1.05); }
.case-card .case-body { padding: 20px; }
.case-card .case-body h3 { font-size: 17px; color: var(--text); margin-bottom: 4px; font-weight: 600; }
.case-card .case-body .case-industry { font-size: 12px; color: var(--accent); font-weight: 500; margin-bottom: 10px; }
.case-card .case-body p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* ---------- 生产实力(设备)卡片 ---------- */
.production-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.production-item {
  background: var(--white); border-radius: 12px; overflow: hidden;
  box-shadow: var(--shadow); transition: all var(--tr);
}
.production-item:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.production-item img { width: 100%; aspect-ratio: 3/2; object-fit: cover; }
.production-item .prod-info { padding: 18px 20px; }
.production-item .prod-info h4 { font-size: 16px; color: var(--text); margin-bottom: 6px; font-weight: 600; }
.production-item .prod-info p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; }

/* ---------- 筛选标签 ---------- */
.filter-bar {
  display: flex; justify-content: center; gap: 0; margin-bottom: 36px; flex-wrap: wrap;
}
.filter-tab {
  padding: 9px 22px; font-size: 13px; color: var(--text-secondary); cursor: pointer;
  border: 1px solid var(--border); background: var(--white); transition: all var(--tr);
  font-weight: 500; font-family: inherit;
}
.filter-tab:first-child { border-radius: 6px 0 0 6px; }
.filter-tab:last-child { border-radius: 0 6px 6px 0; }
.filter-tab.active,
.filter-tab:hover { background: var(--pri); color: #fff; border-color: var(--pri); }
.filter-tab.active { font-weight: 600; }

/* ---------- 分页 ---------- */
.pagination {
  display: flex; justify-content: center; align-items: center; gap: 8px;
  margin-top: 40px;
}
.pagination button {
  padding: 8px 16px; font-size: 13px; color: var(--text-secondary);
  background: var(--white); border: 1px solid var(--border); border-radius: 6px;
  cursor: pointer; transition: all var(--tr); font-family: inherit;
}
.pagination button:hover { border-color: var(--pri); color: var(--pri); }
.pagination button.active { background: var(--pri); color: #fff; border-color: var(--pri); }
.pagination button:disabled { opacity: 0.4; cursor: default; color: var(--text-muted); }
.pagination .page-info { font-size: 13px; color: var(--text-secondary); padding: 0 8px; }

/* ---------- 询盘 CTA 区 ---------- */
.inquiry-cta {
  background: var(--pri); padding: 64px 0;
}
.inquiry-cta-inner {
  max-width: 700px; margin: 0 auto; padding: 0 32px; text-align: center;
}
.inquiry-cta-inner h2 { font-size: 1.8rem; color: #fff; margin-bottom: 8px; font-weight: 700; letter-spacing: 1px; }
.inquiry-cta-inner > p { color: rgba(255,255,255,0.6); font-size: 14px; margin-bottom: 32px; }
.inquiry-form {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
}
.inquiry-form input,
.inquiry-form textarea,
.inquiry-form select {
  padding: 12px 14px; border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.07); color: #fff; border-radius: 6px;
  font-size: 14px; outline: none; font-family: inherit; transition: border-color var(--tr);
}
.inquiry-form input::placeholder,
.inquiry-form textarea::placeholder { color: rgba(255,255,255,0.4); }
.inquiry-form input:focus,
.inquiry-form textarea:focus { border-color: var(--accent); }
.inquiry-form input { flex: 1; min-width: 160px; }
.inquiry-form textarea { flex: 2; min-width: 260px; resize: vertical; min-height: 46px; max-height: 120px; }
.inquiry-form .btn-cta { flex-shrink: 0; white-space: nowrap; }

.inquiry-success {
  display: none; text-align: center; padding: 24px;
}
.inquiry-success .success-icon { font-size: 3rem; margin-bottom: 12px; display: block; }
.inquiry-success h3 { font-size: 1.2rem; color: #fff; margin-bottom: 6px; }
.inquiry-success p { color: rgba(255,255,255,0.6); font-size: 14px; }

/* 白底表单（产品详情页/联系页用） */
.inquiry-form-light { }
.inquiry-form-light input,
.inquiry-form-light textarea,
.inquiry-form-light select {
  background: var(--white); color: var(--text); border-color: var(--border);
}
.inquiry-form-light input::placeholder,
.inquiry-form-light textarea::placeholder { color: var(--text-muted); }

/* ---------- Footer ---------- */
.footer {
  background: var(--pri); color: rgba(255,255,255,0.7);
}
.footer-main {
  max-width: var(--container); margin: 0 auto; padding: 56px 32px 36px;
  display: flex; gap: 40px; flex-wrap: wrap;
}
.footer-col { flex: 1; min-width: 150px; }
.footer-col h4 { font-size: 15px; color: #fff; margin-bottom: 16px; font-weight: 600; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 13px; color: rgba(255,255,255,0.55); transition: color var(--tr); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-contact p { font-size: 13px; color: rgba(255,255,255,0.55); margin-bottom: 8px; }
.footer-qr { text-align: center; }
.footer-qr img { margin: 0 auto; border-radius: 8px; background: #fff; padding: 4px; width: 100px; height: 100px; }
.footer-qr p { font-size: 12px; color: rgba(255,255,255,0.45); margin-top: 10px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06); padding: 20px 32px;
  text-align: center; font-size: 12px; color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.35); }
.footer-bottom a:hover { color: var(--accent); }

/* ---------- 滚动展示动画 ---------- */
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- 数字计数器 ---------- */
.counter-grid {
  display: flex; justify-content: center; gap: 0; flex-wrap: wrap;
}
.counter-item {
  flex: 1; min-width: 140px; text-align: center; padding: 24px 16px;
  border-right: 1px solid var(--border);
}
.counter-item:last-child { border-right: none; }
.counter-item .counter-val {
  display: block; font-size: 2.8rem; font-weight: 800; color: var(--accent);
  line-height: 1.1; margin-bottom: 6px;
}
.counter-item .counter-unit { font-size: 0.9rem; color: var(--text-muted); margin-left: 2px; }
.counter-item p { font-size: 14px; color: var(--text-muted); font-weight: 500; }

/* ---------- 生产实力页板块 ---------- */
.capability-section { padding: 80px 0; }
.capability-section:nth-child(even) { background: var(--bg); }
.capability-section .section-header { margin-bottom: 40px; }

/* ---------- 关于我们页 ---------- */
.about-intro { display: flex; gap: 60px; align-items: center; }
.about-intro .about-img-wrap { flex: 0 0 460px; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-intro .about-img-wrap img { width: 100%; aspect-ratio: 4/3; object-fit: cover; }
.about-intro .about-text { flex: 1; }
.about-intro .about-text h2 { font-size: 1.8rem; font-weight: 700; color: var(--text); margin-bottom: 16px; }
.about-intro .about-text p { font-size: 15px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 14px; }

.culture-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.culture-card {
  text-align: center; padding: 40px 24px 32px; background: var(--white);
  border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow);
}
.culture-card .culture-icon { font-size: 2.4rem; margin-bottom: 14px; display: block; }
.culture-card h4 { font-size: 16px; color: var(--text); margin-bottom: 8px; font-weight: 600; }
.culture-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ---------- 联系页 ---------- */
.contact-layout { display: flex; gap: 48px; }
.contact-info { flex: 0 0 380px; }
.contact-info h3 { font-size: 1.4rem; font-weight: 700; color: var(--text); margin-bottom: 24px; }
.contact-item {
  display: flex; gap: 14px; align-items: flex-start; margin-bottom: 20px;
  padding-bottom: 16px; border-bottom: 1px solid var(--border);
}
.contact-item:last-child { border-bottom: none; }
.contact-item .contact-icon { font-size: 1.4rem; flex-shrink: 0; }
.contact-item strong { display: block; font-size: 14px; color: var(--text); margin-bottom: 2px; }
.contact-item span { font-size: 14px; color: var(--text-secondary); }
.contact-map {
  margin-top: 24px; border-radius: var(--radius); overflow: hidden;
  min-height: 280px; background: var(--bg); border: 1px solid var(--border);
}
.contact-map iframe { width: 100%; min-height: 280px; }
.contact-form-wrap { flex: 1; }
.contact-form-wrap h3 { font-size: 1.4rem; font-weight: 700; color: var(--text); margin-bottom: 24px; }
.contact-form { display: flex; flex-wrap: wrap; gap: 14px; }
.contact-form input,
.contact-form textarea,
.contact-form select {
  padding: 12px 14px; border: 1px solid var(--border); background: var(--white);
  border-radius: 6px; font-size: 14px; outline: none; font-family: inherit;
  transition: border-color var(--tr); color: var(--text);
}
.contact-form input:focus,
.contact-form textarea:focus { border-color: var(--pri); }
.contact-form input.half { flex: 1; min-width: 200px; }
.contact-form textarea { flex: 0 0 100%; min-height: 100px; resize: vertical; }
.contact-form .btn-cta { flex-shrink: 0; }

.business-hours { margin-top: 24px; padding: 16px; background: var(--bg); border-radius: var(--radius); }
.business-hours h4 { font-size: 14px; color: var(--text); margin-bottom: 8px; font-weight: 600; }
.business-hours p { font-size: 13px; color: var(--text-secondary); line-height: 1.8; }

/* ---------- 产品详情页 ---------- */
.product-detail-page { padding-top: 100px; padding-bottom: 60px; }
.back-link {
  display: inline-block; color: var(--text-secondary); font-size: 13px; margin-bottom: 28px;
  transition: color var(--tr);
}
.back-link:hover { color: var(--accent); }
.detail-main { display: flex; gap: 48px; margin-bottom: 48px; }
.detail-gallery { flex: 0 0 480px; }
.detail-gallery .main-img {
  width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius);
  box-shadow: var(--shadow); margin-bottom: 12px;
}
.detail-gallery .thumb-list { display: flex; gap: 8px; }
.detail-gallery .thumb-list img {
  width: 72px; height: 54px; object-fit: cover; border-radius: 4px;
  cursor: pointer; border: 2px solid transparent; transition: border-color var(--tr);
}
.detail-gallery .thumb-list img:hover,
.detail-gallery .thumb-list img.active { border-color: var(--accent); }

.detail-info { flex: 1; }
.detail-info h1 { font-size: 1.8rem; color: var(--text); margin-bottom: 4px; font-weight: 700; }
.detail-info .detail-cat { font-size: 13px; color: var(--accent); font-weight: 600; margin-bottom: 14px; }
.detail-info .detail-desc { font-size: 15px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 24px; }
.specs-table { width: 100%; margin-bottom: 24px; }
.specs-table th, .specs-table td {
  padding: 11px 14px; text-align: left; font-size: 13px; border-bottom: 1px solid var(--border);
}
.specs-table th { background: var(--bg); color: var(--text-secondary); font-weight: 600; width: 35%; }
.specs-table td { color: var(--text); }
.pdf-download { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 28px; }

.detail-inquiry {
  background: var(--bg); border-radius: var(--radius); padding: 28px 30px;
}
.detail-inquiry h3 { font-size: 1.1rem; color: var(--text); margin-bottom: 14px; font-weight: 600; }
.detail-inquiry .inquiry-form input,
.detail-inquiry .inquiry-form textarea {
  background: #fff; color: var(--text); border-color: var(--border);
}

/* 右侧悬浮询价按钮（桌面端） */
.side-inquiry-btn {
  display: none; position: fixed; right: 24px; bottom: 120px; z-index: 900;
  writing-mode: vertical-lr; padding: 16px 12px; font-size: 14px; font-weight: 700;
  color: #fff; background: var(--accent); border: none; border-radius: 6px;
  cursor: pointer; letter-spacing: 2px; transition: all 0.2s ease; font-family: inherit;
}
.side-inquiry-btn:hover { background: var(--accent-dark); box-shadow: 0 4px 16px rgba(230,126,34,0.4); }
@media (min-width: 1024px) { .side-inquiry-btn { display: block; } }

/* ---------- 移动端导航 ---------- */
.m-header, .m-menu { display: none; }

/* ========================================
   响应式
   ======================================== */

/* ---------- 平板：768 - 1023 ---------- */
@media (max-width: 1023px) {
  .header { display: none; }

  .m-header {
    display: flex; align-items: center; justify-content: space-between;
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    padding: 0 20px; height: 56px; background: var(--pri);
    border-bottom: 1px solid rgba(255,255,255,0.06);
  }
  .m-header .m-logo img { height: 28px; width: auto; }

  .hamburger {
    width: 26px; height: 18px; background: none; border: none;
    display: flex; flex-direction: column; justify-content: space-between;
    cursor: pointer; z-index: 1001; padding: 0;
  }
  .hamburger span { display: block; height: 2px; background: #fff; transition: all 0.3s ease; border-radius: 2px; }
  .hamburger.open span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
  .hamburger.open span:nth-child(2) { opacity: 0; }
  .hamburger.open span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

  .m-menu {
    display: block; position: fixed; top: 56px; left: 0; right: 0; bottom: 0;
    background: var(--white); z-index: 999; overflow-y: auto; padding: 16px;
    transform: translateX(100%); transition: transform 0.3s ease;
  }
  .m-menu.open { transform: translateX(0); }
  .m-menu > ul > li { border-bottom: 1px solid var(--border); }
  .m-menu > ul > li > a { display: block; padding: 14px 0; color: var(--text); font-size: 15px; font-weight: 500; }
  .m-menu .btn-inquiry {
    display: block; margin-top: 16px; padding: 12px; text-align: center;
    background: var(--accent); color: #fff; border-radius: 6px; font-weight: 600;
  }

  /* 布局调整 */
  .container { padding: 0 24px; }
  .section-padding { padding: 56px 0; }
  .section-title { font-size: 1.6rem; }

  .hero-content h1 { font-size: 2.2rem; letter-spacing: 2px; }
  .hero-content p { font-size: 1rem; }
  .hero { height: 420px; }

  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .scene-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .production-grid { grid-template-columns: repeat(2, 1fr); }
  .culture-grid { grid-template-columns: repeat(2, 1fr); }

  .about-intro { flex-direction: column; gap: 32px; }
  .about-intro .about-img-wrap { flex: 0 0 auto; max-width: 100%; }
  .contact-layout { flex-direction: column; }
  .contact-info { flex: 0 0 auto; }

  .detail-main { flex-direction: column; gap: 28px; }
  .detail-gallery { flex: 0 0 auto; max-width: 100%; }

  .counter-item { flex: 0 0 50%; padding: 20px 12px; }
  .counter-item:nth-child(2) { border-right: none; }
  .counter-val { font-size: 2.2rem !important; }

  .filter-tab { padding: 8px 16px; font-size: 12px; }
  .footer-col { flex: 0 0 calc(50% - 20px); }
  .inquiry-form input { min-width: 140px; }
}

/* ---------- 手机：< 768 ---------- */
@media (max-width: 767px) {
  .section-padding { padding: 44px 0; }
  .section-title { font-size: 1.4rem; }
  .hero-content h1 { font-size: 1.7rem; letter-spacing: 1px; }
  .hero-content p { font-size: 0.9rem; letter-spacing: 1px; }
  .hero { height: 340px; }

  .advantage-grid { grid-template-columns: 1fr; gap: 14px; }
  .advantage-card { padding: 32px 20px 24px; }
  .advantage-card .adv-stat { font-size: 1.5rem; }
  .product-grid { grid-template-columns: 1fr; gap: 14px; }
  .product-card .card-img { height: 220px; }
  .scene-grid { grid-template-columns: 1fr; gap: 12px; }
  .case-grid { grid-template-columns: 1fr; }
  .production-grid { grid-template-columns: 1fr; }
  .culture-grid { grid-template-columns: 1fr; }
  .counter-item { flex: 0 0 50%; border-bottom: 1px solid var(--border); }
  .counter-item:nth-child(2) { border-right: none; }

  .footer-main { padding: 40px 20px 24px; gap: 24px; }
  .footer-col { flex: 0 0 100%; text-align: center; }
  .footer-qr img { margin: 0 auto; }

  .filter-bar { gap: 6px; }
  .filter-tab { padding: 7px 12px; font-size: 12px; border-radius: 6px !important; }

  .btn-cta, .btn-outline, .btn-ghost { padding: 12px 28px; font-size: 14px; }
  .hero-btns { flex-direction: column; align-items: center; }

  .detail-main { flex-direction: column; }
  .detail-info h1 { font-size: 1.4rem; }
  .product-detail-page { padding-top: 80px; }

  .inquiry-cta-inner h2 { font-size: 1.4rem; }
  .inquiry-form { flex-direction: column; }
  .inquiry-form input, .inquiry-form textarea { min-width: auto; flex: auto; }

  .contact-form input.half { flex: 0 0 100%; min-width: auto; }

  .side-inquiry-btn { display: none !important; }
}