@charset "utf-8";
/* ==========================================================================
   ruilaibo 检测设备行业高端模板 - 基础层
   主色 #00289a   辅助色 #ef8225
   ========================================================================== */

/* ---------- 1. Reset ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--t1);
  background: #fff;
  overflow-x: hidden;
}
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; font-size: inherit; }
ul, ol, li { list-style: none; }
a { color: inherit; text-decoration: none; transition: color var(--dur), background-color var(--dur), border-color var(--dur), opacity var(--dur); }
img { border: 0; vertical-align: middle; max-width: 100%; }
input, button, textarea, select { font-family: inherit; font-size: inherit; color: inherit; border: 0; outline: none; background: none; }
button { cursor: pointer; }
em, i, address, cite { font-style: normal; }
table { border-collapse: collapse; border-spacing: 0; }
::selection { background: var(--pri); color: #fff; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: #eef1f8; }
::-webkit-scrollbar-thumb { background: #b9c4dc; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--pri); }

/* ---------- 2. 设计变量 ---------- */
:root {
  --pri: #00289a;
  --pri-d: #001c6e;
  --pri-l: #1f4bd8;
  --pri-bg: #f1f5ff;
  --acc: #ef8225;
  --acc-l: #ff9c40;
  --acc-bg: #fff6ee;
  --t1: #141a33;
  --t2: #4d5772;
  --t3: #8b93a7;
  --line: #e8ecf6;
  --bg: #ffffff;
  --bg2: #f6f8fd;
  --bg3: #eef2fb;
  --sh-s: 0 4px 16px rgba(0, 40, 154, .06);
  --sh-m: 0 12px 32px rgba(0, 40, 154, .09);
  --sh-l: 0 24px 54px rgba(0, 40, 154, .16);
  --r: 6px;
  --r-l: 10px;
  --container: 1440px;
  --dur: .35s;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

/* ---------- 3. 布局工具 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 30px; }
.container-wide { width: 100%; padding: 0 30px; }
.clear { clear: both; height: 0; overflow: hidden; }
.flex { display: flex; }
.flex-c { display: flex; align-items: center; justify-content: center; }
.flex-b { display: flex; align-items: center; justify-content: space-between; }
.tac { text-align: center; }
.hide { display: none !important; }
.nowrap { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ellipsis-2, .ellipsis-3 {
  display: -webkit-box; -webkit-box-orient: vertical; overflow: hidden;
}
.ellipsis-2 { -webkit-line-clamp: 2; }
.ellipsis-3 { -webkit-line-clamp: 3; }

/* 1:1 图片（padding-bottom 法，兼容性最佳） */
.img-square { position: relative; display: block; width: 100%; padding-bottom: 100%; height: 0; overflow: hidden; }
.img-square > img { position: absolute; left: 0; top: 0; width: 100%; height: 100%; object-fit: cover; display: block; }

/* 屏幕阅读器专用（SEO 语义标题） */
.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  height: 46px; padding: 0 26px; border-radius: 3px;
  font-size: 15px; font-weight: 500; letter-spacing: .5px;
  position: relative; overflow: hidden; z-index: 0; white-space: nowrap;
}
.btn i { font-size: 15px; }
.btn::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  transform: scaleX(0); transform-origin: right center;
  transition: transform var(--dur) var(--ease);
}
.btn:hover::after { transform: scaleX(1); transform-origin: left center; }

.btn-pri { background: var(--pri); color: #fff; }
.btn-pri::after { background: var(--acc); }
.btn-acc { background: var(--acc); color: #fff; }
.btn-acc::after { background: var(--pri); }
.btn-line { border: 1px solid rgba(255, 255, 255, .45); color: #fff; }
.btn-line::after { background: #fff; }
.btn-line:hover { color: var(--pri); border-color: #fff; }
.btn-ghost { border: 1px solid var(--line); color: var(--pri); background: #fff; }
.btn-ghost::after { background: var(--pri); }
.btn-ghost:hover { color: #fff; border-color: var(--pri); }

/* 文字箭头链接 */
.link-more {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 14px; color: var(--t3); letter-spacing: .3px;
}
.link-more i { font-size: 13px; transition: transform var(--dur); }
.link-more:hover { color: var(--acc); }
.link-more:hover i { transform: translateX(5px); }

/* ---------- 5. 版块标题 ---------- */
.sec { padding: 92px 0; position: relative; }
.sec-bg2 { background: var(--bg2); }
.sec-head { margin-bottom: 50px; position: relative; }
.sec-head.center { text-align: center; }
.sec-en {
  display: block; font-size: 13px; font-weight: 600; letter-spacing: 3px;
  text-transform: uppercase; color: var(--acc); margin-bottom: 12px;
}
.sec-tit { font-size: 38px; font-weight: 700; letter-spacing: -.5px; color: var(--t1); }
.sec-tit b { color: var(--pri); }
.sec-tit .dot { color: var(--acc); }
.sec-sub { margin-top: 14px; font-size: 15px; color: var(--t3); max-width: 720px; }
.sec-head.center .sec-sub { margin-left: auto; margin-right: auto; }
.sec-bar {
  display: block; width: 54px; height: 3px; margin-top: 20px;
  background: linear-gradient(90deg, var(--acc), rgba(239, 130, 37, 0));
  transform: scaleX(0); transform-origin: left center;
  transition: transform .8s var(--ease) .15s;
}
.sec-head.center .sec-bar { margin-left: auto; margin-right: auto; transform-origin: center; }
.in-view .sec-bar { transform: scaleX(1); }
.sec-head .link-more {
  position: absolute; right: 0; bottom: 8px;
}
.sec-head-lite { display: flex; align-items: flex-end; justify-content: space-between; gap: 26px; }
.sec-head-lite .link-more { position: static; right: auto; bottom: auto; padding-bottom: 6px; }

/* 深色版块标题 */
.on-dark .sec-tit, .on-dark .sec-tit b { color: #fff; }
.on-dark .sec-sub { color: rgba(255, 255, 255, .62); }

/* ---------- 6. 卡片 ---------- */
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--r); }
.card-hover { transition: transform var(--dur) var(--ease), box-shadow var(--dur), border-color var(--dur); }
.card-hover:hover { transform: translateY(-8px); box-shadow: var(--sh-l); border-color: transparent; }

/* ---------- 7. 滚动进入动画 ---------- */
[data-anim] { opacity: 0; transition: opacity .8s var(--ease), transform .8s var(--ease); will-change: opacity, transform; }
[data-anim="up"]    { transform: translateY(46px); }
[data-anim="down"]  { transform: translateY(-36px); }
[data-anim="left"]  { transform: translateX(-46px); }
[data-anim="right"] { transform: translateX(46px); }
[data-anim="zoom"]  { transform: scale(.9); }
[data-anim="fade"]  { transform: none; }
[data-anim].in-view { opacity: 1; transform: none; }

/* 数字/文字遮罩动画 */
.mask-up { overflow: hidden; display: block; }

@media (prefers-reduced-motion: reduce) {
  [data-anim] { opacity: 1 !important; transform: none !important; }
  html { scroll-behavior: auto; }
}