/* ============================================
   Crane Supplier — Lifting Equipment Export Site
   风格参考 macart.cn 版式（自写代码，未复制其源码）
   主色：工业深绿 / 深色底 / 白底卡片 / 大图导向
   ============================================ */

:root {
  --green: #007a4d;        /* 主绿 */
  --green-dark: #005c3a;   /* 深绿 */
  --ink: #1d2b26;          /* 深底色（footer） */
  --text: #333333;
  --muted: #6b7a74;
  --line: #e3e9e6;
  --bg-soft: #f4f7f5;
  --cta: #ff7a00;          /* CTA 橙 */
  --white: #ffffff;
  --radius: 6px;
  --container: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  font-size: 16px;
  line-height: 1.7;
  background: var(--white);
}

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

.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }
.flex { display: flex; }
.align-items-center { align-items: center; }
.justify-space-between { justify-content: space-between; }
.text-center { text-align: center; }

/* ---------- 通用标题 ---------- */
.tit h2 {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: .5px;
}
.tit .blue h2 { color: var(--green-dark); }
.more a {
  font-size: 15px;
  color: var(--green);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.more a:hover { color: var(--cta); }

.green { color: var(--green); }

/* ---------- Header ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .97);
  box-shadow: 0 1px 8px rgba(0, 0, 0, .06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo a {
  font-size: 26px;
  font-weight: 800;
  color: var(--ink);
  letter-spacing: 1px;
}
.logo a span { color: var(--green); }

.nav { display: flex; align-items: center; gap: 34px; }
.nav > li { position: relative; }
.nav > li > a {
  display: block;
  padding: 24px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: color .2s;
}
.nav > li > a:hover,
.nav > li.active > a { color: var(--green); }

/* 下拉菜单 */
.nav .dropdown {
  position: absolute;
  top: 100%;
  left: -20px;
  min-width: 220px;
  background: var(--white);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .12);
  border-radius: var(--radius);
  padding: 10px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all .25s;
}
.nav > li:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown li a {
  display: block;
  padding: 9px 22px;
  font-size: 14.5px;
  color: var(--text);
}
.dropdown li a:hover { background: var(--bg-soft); color: var(--green); }

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--green);
  color: #fff;
  font-weight: 700;
  font-size: 14.5px;
  padding: 10px 20px;
  border-radius: 999px;
  transition: background .2s;
}
.header-cta:hover { background: var(--cta); }

/* 移动端菜单按钮 */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--ink); }

/* ---------- Banner 轮播 ---------- */
.banner { position: relative; height: 560px; overflow: hidden; }
.banner-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 1s ease;
  background-size: cover;
  background-position: center;
}
.banner-slide.active { opacity: 1; }
.banner-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(9, 26, 20, .72) 0%, rgba(9, 26, 20, .25) 60%, rgba(9, 26, 20, 0) 100%);
}
.banner-txt {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  color: #fff;
}
.banner-txt h1 {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.25;
  max-width: 700px;
  text-shadow: 0 2px 18px rgba(0, 0, 0, .35);
}
.banner-txt p {
  margin-top: 18px;
  font-size: 19px;
  max-width: 560px;
  color: rgba(255, 255, 255, .92);
}
.banner-txt .banner-btn {
  margin-top: 30px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  background: var(--green);
  color: #fff;
  font-weight: 700;
  font-size: 16px;
  padding: 13px 30px;
  border-radius: 999px;
  transition: background .2s;
}
.banner-txt .banner-btn:hover { background: var(--cta); }

.banner-dots {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  gap: 10px;
}
.banner-dots span {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .5);
  cursor: pointer;
  transition: all .3s;
}
.banner-dots span.active { background: var(--green); width: 34px; border-radius: 6px; }

/* ---------- 绿色标题条 ---------- */
.bg-green {
  background: var(--green);
  padding: 20px 0;
}
.bg-green .tit h2 { color: #fff; font-size: 26px; }
.bg-green .more a { color: #d9f2e5; }
.bg-green .more a:hover { color: #fff; }

/* ---------- 产品卡片网格 ---------- */
.idxpros {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  padding: 40px 20px;
  max-width: var(--container);
  margin: 0 auto;
}
.idxpros .pro-card {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .08);
  transition: transform .25s, box-shadow .25s;
  background: var(--white);
}
.idxpros .pro-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, .14);
}
.idxpros .pro-card .media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-soft);
}
.idxpros .pro-card .media img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.idxpros .pro-card:hover .media img { transform: scale(1.06); }
.idxpros .pro-card .info {
  padding: 16px 18px;
  font-weight: 700;
  font-size: 16.5px;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.idxpros .pro-card .info i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  display: inline-block;
}

/* ---------- 公司介绍区 ---------- */
.idxadv { padding: 80px 0 60px; }
.idxadv h2 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.3;
  max-width: 860px;
  margin: 0 auto;
}
.idxadv p {
  max-width: 780px;
  margin: 22px auto 0;
  color: var(--muted);
  font-size: 16.5px;
}
.more2 {
  margin-top: 26px;
  display: inline-block;
}
.more2 a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 2px solid var(--green);
  color: var(--green);
  font-weight: 700;
  padding: 11px 30px;
  border-radius: 999px;
  transition: all .2s;
}
.more2 a:hover { background: var(--green); color: #fff; }

/* ---------- 数据块 ---------- */
.advantage {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  max-width: var(--container);
  margin: 50px auto 0;
  padding: 0 20px;
}
.advantage ul {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 28px 18px;
  text-align: center;
}
.advantage .nums b {
  font-size: 42px;
  font-weight: 800;
  color: var(--green);
}
.advantage .nums p { font-size: 30px; font-weight: 800; color: var(--green); }
.advantage ul > li:last-child {
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--muted);
}
.advantage .advico {
  font-size: 34px;
  margin-bottom: 10px;
}

/* ---------- 理念横幅区 ---------- */
.advlist {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: var(--container);
  margin: 70px auto 0;
  padding: 0 20px;
}
.advlist .alist {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3 / 4;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .1);
}
.advlist .alist img { width: 100%; height: 100%; object-fit: cover; }
.advlist .txta {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 34px 22px 20px;
  background: linear-gradient(0deg, rgba(9, 26, 20, .85) 0%, rgba(9, 26, 20, 0) 100%);
  color: #fff;
}
.advlist .txta h2 { font-size: 22px; font-weight: 700; margin-bottom: 6px; }
.advlist .txta .more a { color: #bfe8d2; font-size: 14px; }

/* ---------- 新闻/案例区 ---------- */
.sec-news { padding: 70px 0 80px; }
.sec-news .tit { margin-bottom: 34px; }
.in-news {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 20px;
}
.in-news .headimg {
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  box-shadow: 0 4px 16px rgba(0, 0, 0, .1);
}
.in-news .headimg .media { aspect-ratio: 16 / 9; overflow: hidden; background: var(--bg-soft); }
.in-news .headimg img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.in-news .headimg:hover img { transform: scale(1.05); }
.post-title {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 40px 24px 20px;
  background: linear-gradient(0deg, rgba(9, 26, 20, .88) 0%, rgba(9, 26, 20, 0) 100%);
  color: #fff;
}
.post-title h4 { font-size: 19px; font-weight: 700; line-height: 1.45; }
.datetxt { margin-top: 8px; font-size: 13px; color: rgba(255, 255, 255, .8); }
.gray_bg {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 16px;
  transition: all .25s;
}
.gray_bg:hover { background: #eaf3ee; }
.gray_bg h6 { font-size: 16.5px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.gray_bg .datetxt { color: var(--muted); }
.gray_bg hr { border: none; border-top: 1px solid var(--line); margin: 10px 0; }
.gray_bg p { font-size: 14px; color: var(--muted); }

/* ---------- Footer ---------- */
.footer { background: var(--ink); color: #cfdcd6; margin-top: 40px; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.6fr;
  gap: 40px;
  padding: 60px 0 40px;
}
.footer h6 { font-size: 16px; color: #fff; margin-bottom: 16px; }
.footer .brand-desc { font-size: 14px; line-height: 1.8; color: #9fb3aa; max-width: 280px; }
.footer ul li { margin-bottom: 9px; }
.footer ul li a { font-size: 14px; color: #9fb3aa; }
.footer ul li a:hover { color: var(--green); }
.footer .contact-list li { display: flex; gap: 10px; font-size: 14px; align-items: flex-start; }
.footer .contact-list .ico { color: var(--green); font-weight: 700; }
.footer hr { border: none; border-top: 1px solid rgba(255, 255, 255, .12); }
.copyright {
  padding: 20px 0;
  font-size: 13.5px;
  color: #7e948a;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 内页通用 ---------- */
.page-hero {
  position: relative;
  height: 260px;
  background: linear-gradient(120deg, var(--ink) 0%, #0d3a2b 60%, var(--green-dark) 100%);
  display: flex;
  align-items: center;
  color: #fff;
}
.page-hero h1 { font-size: 40px; font-weight: 800; }
.page-hero .crumbs { margin-top: 10px; font-size: 14px; color: #b9ccc4; }
.page-hero .crumbs a { color: #e2efe9; }
.page-hero .crumbs a:hover { color: var(--cta); }

.section { padding: 60px 0; }
.section .sec-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 12px;
}
.section .sec-sub { color: var(--muted); font-size: 16px; max-width: 760px; }

/* 产品总览页：分节 */
.prod-block {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 56px 0;
  border-bottom: 1px solid var(--line);
}
.prod-block:last-child { border-bottom: none; }
.prod-block .media { border-radius: var(--radius); overflow: hidden; box-shadow: 0 6px 22px rgba(0, 0, 0, .12); background: var(--bg-soft); }
.prod-block .media img { width: 100%; height: 100%; object-fit: cover; }
.prod-block h3 { font-size: 27px; font-weight: 800; color: var(--ink); }
.prod-block h3 a:hover { color: var(--green); }
.prod-block .tags { margin: 12px 0 14px; display: flex; flex-wrap: wrap; gap: 8px; }
.prod-block .tags span {
  background: #e6f4ec;
  color: var(--green-dark);
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 600;
}
.prod-block p { color: var(--muted); font-size: 15.5px; }
.prod-block .more2 { margin-top: 18px; }

/* 产品详情页 */
.detail-layout {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 48px;
  align-items: start;
}
.detail-media { border-radius: var(--radius); overflow: hidden; box-shadow: 0 6px 22px rgba(0, 0, 0, .12); background: var(--bg-soft); }
.detail-info h2 { font-size: 30px; font-weight: 800; color: var(--ink); margin-bottom: 14px; }
.detail-info .lead { color: var(--muted); font-size: 16px; margin-bottom: 20px; }
.detail-info .cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 15px;
  padding: 12px 26px;
  border-radius: 999px;
  transition: all .2s;
  cursor: pointer;
}
.btn-green { background: var(--green); color: #fff; }
.btn-green:hover { background: var(--green-dark); }
.btn-cta { background: var(--cta); color: #fff; }
.btn-cta:hover { background: #e06a00; }

.spec-table { width: 100%; border-collapse: collapse; margin-top: 8px; }
.spec-table th, .spec-table td {
  border: 1px solid var(--line);
  padding: 11px 16px;
  text-align: left;
  font-size: 14.5px;
}
.spec-table th { background: var(--bg-soft); color: var(--ink); width: 32%; font-weight: 700; }
.spec-table tr:nth-child(even) td { background: #fafcfb; }

.app-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 24px;
}
.app-grid .app-card {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 22px;
  border-left: 4px solid var(--green);
}
.app-grid .app-card h4 { font-size: 16.5px; color: var(--ink); margin-bottom: 6px; }
.app-grid .app-card p { font-size: 14px; color: var(--muted); }

/* 相关产品 */
.related { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 24px; }
.related .pro-card { border-radius: var(--radius); overflow: hidden; box-shadow: 0 4px 14px rgba(0,0,0,.08); transition: transform .25s; background: #fff; }
.related .pro-card:hover { transform: translateY(-5px); }
.related .media { aspect-ratio: 16/9; background: var(--bg-soft); }
.related .media img { width: 100%; height: 100%; object-fit: cover; }
.related .info { padding: 12px 16px; font-weight: 700; font-size: 15px; }

/* 询盘 CTA 区 */
.cta-band {
  background: linear-gradient(120deg, var(--green-dark) 0%, var(--green) 100%);
  color: #fff;
  padding: 56px 0;
}
.cta-band h2 { font-size: 30px; font-weight: 800; }
.cta-band p { margin-top: 10px; color: #d9f2e5; }
.cta-band .btn { margin-top: 22px; background: #fff; color: var(--green-dark); }
.cta-band .btn:hover { background: var(--cta); color: #fff; }

/* 联系表单 */
.contact-layout { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 700; font-size: 14.5px; margin-bottom: 6px; color: var(--ink); }
.form-group input,
.form-group textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  font-size: 15px;
  font-family: inherit;
  transition: border .2s;
}
.form-group input:focus,
.form-group textarea:focus { outline: none; border-color: var(--green); }
.form-group textarea { min-height: 130px; resize: vertical; }
.form-hint { font-size: 13px; color: var(--muted); margin-top: 6px; }

.info-card {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 22px 24px;
  margin-bottom: 16px;
}
.info-card h4 { color: var(--ink); font-size: 16px; margin-bottom: 6px; }
.info-card p { font-size: 14.5px; color: var(--muted); }

/* ---------- 滚动渐显 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .banner { height: 420px; }
  .banner-txt h1 { font-size: 36px; }
  .idxpros { grid-template-columns: repeat(2, 1fr); }
  .advantage { grid-template-columns: repeat(2, 1fr); }
  .advlist { grid-template-columns: repeat(2, 1fr); }
  .in-news { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .prod-block { grid-template-columns: 1fr; gap: 24px; }
  .detail-layout { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr 1fr; }
  .related { grid-template-columns: repeat(2, 1fr); }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav { display: none; }
  .nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 12px 20px 20px;
    box-shadow: 0 14px 24px rgba(0, 0, 0, .1);
    gap: 0;
    align-items: stretch;
  }
  .nav > li > a { padding: 12px 0; border-bottom: 1px solid var(--line); }
  .nav .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    padding: 0 0 8px;
  }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .banner { height: 340px; }
  .banner-txt h1 { font-size: 28px; }
  .banner-txt p { font-size: 15px; }
  .idxpros { grid-template-columns: 1fr 1fr; gap: 12px; padding: 24px 16px; }
  .idxadv h2 { font-size: 28px; }
  .tit h2 { font-size: 26px; }
  .advantage { grid-template-columns: 1fr 1fr; gap: 14px; padding: 0 16px; }
  .advlist { grid-template-columns: 1fr; padding: 0 16px; }
  .app-grid { grid-template-columns: 1fr; }
  .related { grid-template-columns: 1fr 1fr; }
  .page-hero { height: 200px; }
  .page-hero h1 { font-size: 30px; }
}