/* 山东野岭液冷 - 工业B端官网样式
   主色: 深灰 #2b2f36 / 浅蓝 #3a7ca5 / 白 #ffffff
   风格: 简洁、专业、无动画、信息优先 */

:root {
  --ink: #2b2f36;        /* 深灰主色 */
  --ink-2: #3e434c;      /* 次级深灰 */
  --ink-3: #6b7078;      /* 说明灰 */
  --blue: #3a7ca5;       /* 浅蓝品牌色 */
  --blue-deep: #2f6487;
  --line: #e3e6ea;       /* 分割线 */
  --bg: #ffffff;
  --bg-soft: #f5f7f9;    /* 浅灰底 */
  --warn: #b3542e;       /* 警示橙（商务提示） */
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
  background: var(--bg);
}

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-deep); text-decoration: underline; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
header.site-header {
  background: var(--ink);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 3px solid var(--blue);
}
.header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo { font-size: 19px; font-weight: 700; color: #fff; letter-spacing: .5px; }
.logo .logo-en { color: var(--blue); display: block; font-size: 11px; font-weight: 400; letter-spacing: 1px; text-transform: uppercase; margin-top: -2px; }

nav.main-nav ul { list-style: none; display: flex; gap: 4px; }
nav.main-nav a {
  color: #d7dbe0;
  display: block;
  padding: 8px 12px;
  font-size: 15px;
  border-radius: 4px;
}
nav.main-nav a:hover { color: #fff; background: rgba(255,255,255,.08); text-decoration: none; }
nav.main-nav a.active { color: #fff; background: var(--blue); }

.nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 24px; cursor: pointer; padding: 4px 8px; }

/* ===== 首屏 Hero ===== */
.hero { background: linear-gradient(160deg, #2b2f36 0%, #3e434c 70%, #3a7ca5 100%); color: #fff; padding: 72px 0 80px; }
.hero h1 { font-size: 42px; font-weight: 700; line-height: 1.3; letter-spacing: 1px; margin-bottom: 16px; }
.hero .subtitle { font-size: 19px; color: #cfd8e0; max-width: 720px; }
.hero .hero-tags { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 12px; }
.hero .hero-tag { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2); padding: 6px 16px; border-radius: 20px; font-size: 14px; }

/* ===== 通用板块 ===== */
.section { padding: 56px 0; }
.section.bg-soft { background: var(--bg-soft); }
.section-title { font-size: 28px; font-weight: 700; margin-bottom: 10px; position: relative; padding-left: 16px; }
.section-title::before { content: ""; position: absolute; left: 0; top: 6px; bottom: 6px; width: 5px; background: var(--blue); border-radius: 2px; }
.section-desc { color: var(--ink-3); font-size: 16px; margin-bottom: 36px; max-width: 860px; }

/* ===== 首页8大业务网格 ===== */
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px 20px;
}
.card .card-icon { font-size: 26px; margin-bottom: 12px; color: var(--blue); }
.card h3 { font-size: 17px; margin-bottom: 8px; color: var(--ink); }
.card p { font-size: 14px; color: var(--ink-3); line-height: 1.6; }

/* ===== 套餐预览 ===== */
.pkg-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pkg-card { border: 1px solid var(--line); border-top: 4px solid var(--blue); border-radius: 8px; padding: 26px 22px; background: #fff; }
.pkg-card.hot { border-top-color: var(--warn); }
.pkg-card .pkg-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.pkg-card .pkg-tag { display: inline-block; font-size: 12px; color: var(--blue-deep); background: #eef4f8; padding: 2px 10px; border-radius: 10px; margin-bottom: 12px; }
.pkg-card.hot .pkg-tag { color: var(--warn); background: #faf0eb; }
.pkg-card ul { list-style: none; margin-top: 8px; }
.pkg-card li { font-size: 14px; color: var(--ink-2); padding: 6px 0; border-bottom: 1px dashed var(--line); }
.pkg-card li:last-child { border-bottom: none; }

/* ===== 列表 / 价值点 ===== */
.list-arrow { list-style: none; }
.list-arrow li { position: relative; padding: 10px 0 10px 26px; border-bottom: 1px solid var(--line); color: var(--ink-2); }
.list-arrow li::before { content: "▸"; position: absolute; left: 6px; color: var(--blue); font-weight: 700; }
.list-arrow li:last-child { border-bottom: none; }

.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 12px; }
.value-item { background: #fff; border-left: 4px solid var(--blue); padding: 18px 18px; box-shadow: 0 1px 3px rgba(0,0,0,.04); border-radius: 6px; }
.value-item h4 { font-size: 16px; margin-bottom: 6px; }
.value-item p { font-size: 14px; color: var(--ink-3); }

/* ===== 表格 ===== */
table.price-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.price-table thead th { background: var(--ink); color: #fff; text-align: left; padding: 12px 14px; font-weight: 600; }
.price-table tbody td { padding: 12px 14px; border-bottom: 1px solid var(--line); color: var(--ink-2); vertical-align: top; }
.price-table tbody tr:nth-child(even) { background: var(--bg-soft); }
.price-table .unit { white-space: nowrap; }
.price-table .price { white-space: nowrap; font-weight: 600; color: var(--blue-deep); }

/* ===== 商务提示 ===== */
.notice-box { background: #faf0eb; border: 1px solid #ebd6c9; border-left: 4px solid var(--warn); border-radius: 6px; padding: 20px 22px; margin-top: 32px; }
.notice-box h3 { color: var(--warn); font-size: 17px; margin-bottom: 12px; }
.notice-box ol, .notice-box ul { margin-left: 20px; }
.notice-box li { color: var(--ink-2); padding: 5px 0; }

/* ===== 服务详情 ===== */
.service-block { border: 1px solid var(--line); border-radius: 8px; margin-bottom: 20px; overflow: hidden; }
.service-block .sv-head { background: var(--ink); color: #fff; padding: 16px 22px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.service-block .sv-head h3 { font-size: 18px; font-weight: 600; }
.badge { font-size: 12px; padding: 3px 12px; border-radius: 12px; white-space: nowrap; }
.badge.online { background: #2e7d5b; color: #fff; }
.badge.offline { background: var(--warn); color: #fff; }
.service-block .sv-body { padding: 20px 22px; }
.service-block .sv-body h4 { font-size: 15px; color: var(--blue-deep); margin: 14px 0 6px; }
.service-block .sv-body h4:first-child { margin-top: 0; }
.service-block .sv-body p { color: var(--ink-2); font-size: 15px; }

/* ===== 文章列表 ===== */
.article-list { list-style: none; }
.article-list li { border-bottom: 1px solid var(--line); }
.article-list a { display: flex; justify-content: space-between; align-items: center; padding: 20px 6px; color: var(--ink); font-size: 17px; }
.article-list a:hover { color: var(--blue); text-decoration: none; }
.article-list .art-date { font-size: 13px; color: var(--ink-3); white-space: nowrap; margin-left: 16px; }
.article-list .art-placeholder { font-size: 13px; color: #999; display: inline-block; margin-top: 4px; }

/* ===== 案例占位 ===== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case-card { border: 1px dashed #c3c9d0; border-radius: 8px; min-height: 220px; display: flex; flex-direction: column; align-items: center; justify-content: center; color: #a5abb3; background: var(--bg-soft); text-align: center; padding: 20px; }
.case-card .ph { font-size: 40px; margin-bottom: 10px; }

/* ===== 联系区块 ===== */
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.contact-item { background: #fff; border: 1px solid var(--line); border-radius: 8px; padding: 22px; }
.contact-item h4 { font-size: 14px; color: var(--ink-3); margin-bottom: 8px; }
.contact-item .big { font-size: 20px; font-weight: 700; color: var(--ink); }
.contact-item .big.phone { color: var(--blue-deep); }

/* ===== 页脚 ===== */
footer.site-footer { background: var(--ink); color: #aeb5bd; padding: 36px 0 28px; font-size: 14px; }
.footer-inner { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.footer-inner .foot-top { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; margin-bottom: 24px; }
.footer-inner .foot-brand { font-size: 16px; color: #fff; font-weight: 600; }
.footer-inner .foot-contact { color: #cfd6dd; }
.footer-inner .foot-bottom { border-top: 1px solid #3e434c; padding-top: 16px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; color: #8890a0; font-size: 13px; }
.footer-inner .foot-bottom a { color: #8890a0; }
.footer-inner .icp { color: #8890a0; }

/* ===== 页面头部（内页统一小版） ===== */
.page-head { background: var(--ink); color: #fff; padding: 48px 0; }
.page-head h1 { font-size: 30px; font-weight: 700; }
.page-head .crumb { font-size: 14px; color: #9aa3ac; margin-top: 8px; }
.page-head .crumb a { color: #9aa3ac; }

/* ===== 面包屑内页 ===== */
.breadcrumb { font-size: 14px; color: var(--ink-3); padding: 18px 0 0; }
.breadcrumb a { color: var(--ink-3); }
.breadcrumb span { color: var(--ink); }

/* ===== 按钮 ===== */
.btn { display: inline-block; background: var(--blue); color: #fff; padding: 12px 28px; border-radius: 6px; font-size: 16px; border: none; cursor: pointer; }
.btn:hover { background: var(--blue-deep); color: #fff; text-decoration: none; }
.btn-ghost { display: inline-block; border: 1px solid var(--blue); color: var(--blue); padding: 11px 26px; border-radius: 6px; font-size: 16px; }
.btn-ghost:hover { background: #eef4f8; text-decoration: none; }

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .grid { grid-template-columns: repeat(2, 1fr); }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .pkg-row { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }
  nav.main-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--ink); border-top: 1px solid #3e434c; }
  nav.main-nav.open { display: block; }
  nav.main-nav ul { flex-direction: column; }
  nav.main-nav a { padding: 14px 20px; border-bottom: 1px solid #3e434c; }
}

@media (max-width: 560px) {
  .grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
  .hero .subtitle { font-size: 16px; }
  body { font-size: 15px; }
  .section-title { font-size: 23px; }
  /* 表格在小屏横向滚动 */
  .table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .price-table { font-size: 14px; min-width: 560px; }
}