/* ============================================================
   长沙亿朋信息科技有限公司 官网
   共享样式 style.css
   ============================================================ */

:root {
  --primary: #0a4da3;
  --primary-dark: #063a7d;
  --accent: #0fb2e3;
  --dark: #0d1b2a;
  --gray-bg: #f4f7fb;
  --text: #33414f;
  --text-light: #c7def6;
  --white: #ffffff;
  --shadow: 0 6px 24px rgba(10, 77, 163, 0.10);
  --radius: 12px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  line-height: 1.7;
  background: var(--white);
}

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

.container {
  width: 100%;
  max-width: 1500px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 顶部导航 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  box-shadow: 0 2px 12px rgba(13, 27, 42, 0.06);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height:92px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { height: 44px; width: auto; object-fit: contain; }
.brand-name { font-size: 20px; font-weight: 700; color: var(--primary); line-height: 1.2; }
.brand-sub { font-size: 12px; color: var(--text-light); }
.nav-links { display: flex; gap: 6px; }
.nav-links a {
  padding: 8px 30px;
  font-size: 18px;
  color: var(--text);
  border-radius: 8px;
  transition: all .2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--primary); background: rgba(10,77,163,.08); }
.nav-toggle {
  display: none;
  background: none; border: none;
  font-size: 26px; color: var(--primary); cursor: pointer;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,.75);
  padding: 48px 0 24px;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 32px;
}
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer a { display: block; padding: 4px 0; color: rgba(255,255,255,.7); transition: color .2s; }
.footer a:hover { color: var(--accent); }
.footer-brand { display: flex; gap: 12px; align-items: center; margin-bottom: 14px; }
.footer-brand img { height: 40px; width: auto; object-fit: contain; }
.footer p { margin: 6px 0; }
.footer-bottom {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,.12);
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,.5);
}
.footer-bottom a { display: inline; padding: 0; }

/* ---------- 通用区块 ---------- */
.section { padding: 80px 0; }
.section.gray { background: var(--gray-bg); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 50px; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  color: var(--primary);
  background: rgba(10,77,163,.08);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
  letter-spacing: 1px;
}
.section-title { font-size: 32px; font-weight: 700; color: var(--dark); margin-bottom: 14px; }
.section-title span { color: var(--primary); }
.section-desc { color: var(--text-light); font-size: 16px; }

/* 卡片网格 */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(10,77,163,.05);
  transition: transform .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 12px 32px rgba(10,77,163,.16); }
.card .icon {
  width: 54px; height: 54px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 24px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.card h3 { color: var(--dark); font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--text-light); font-size: 14.5px; }
.card .num { font-size: 48px; font-weight: 800; color: var(--primary); line-height:1; opacity:.7; font-style:italic; }

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  transition: all .2s;
  cursor: pointer;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--accent); }
.btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
.btn-outline:hover { background: var(--primary); color: #fff; }

/* ---------- Banner（每个页面顶部） ---------- */
.banner {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary) 50%, var(--accent));
  color: #fff;
  padding: 72px 0;
  text-align: center;
}
.banner h1 { font-size: 38px; margin-bottom: 12px; }
.banner p { font-size: 17px; color: rgba(255,255,255,.85); }

/* ---------- 首页 Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, var(--accent) 100%);
  color: #fff;
  padding: 110px 0 120px;
  position: relative;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -120px; top: -120px;
  width: 420px; height: 420px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.hero .container { position: relative; z-index: 2;  grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center; }
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  margin-bottom: 22px;
  letter-spacing: 1px;
}
.hero h1 { font-size: 46px; line-height: 1.25; margin-bottom: 20px; }
.hero h1 span { color: #9fe3ff; }
.hero p { font-size: 17px; color: rgba(255,255,255,.9); margin-bottom: 32px; max-width: 540px; }
.hero-cta { display: flex; gap: 16px; }
.hero .btn-outline { border-color: #fff; color: #fff; }
.hero .btn-outline:hover { background: #fff; color: var(--primary); }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.hero-stat {
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius);
  padding: 24px 18px;
  text-align: center;
  backdrop-filter: blur(4px);
}
.hero-stat b { display: block; font-size: 32px; color: #fff; }
.hero-stat small { color: rgba(255,255,255,.85); font-size: 14px; }

/* 里程碑时间轴 */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 30px; }
.timeline::before {
  content: ""; position: absolute; left: 8px; top: 4px; bottom: 4px; width: 3px;
  background: linear-gradient(var(--primary), var(--accent));
  border-radius: 3px;
}
.timeline-item { position: relative; margin-bottom: 30px; }
.timeline-item::before {
  content: ""; position: absolute; left: -30px; top: 6px;
  width: 15px; height: 15px; border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--primary);
}
.timeline-item b { display: block; color: var(--primary); font-size: 15px; margin-bottom: 4px; }
.timeline-item p { color: var(--text-light); font-size: 15px; }

/* 案例 */
.case-item { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; border: 1px solid rgba(10,77,163,.06); transition: transform .25s; }
.case-item:hover { transform: translateY(-6px); }
.case-thumb { height: 160px; background: linear-gradient(135deg, var(--primary), var(--accent)); display: flex; align-items: center; justify-content: center; font-size: 42px; color: rgba(255,255,255,.9); }
.case-item .case-media {
  position: relative;
  height: 190px;
  overflow: hidden;
  background: #eef2f8;
}
.case-item .case-media img {
  width: 100%; height: 100%; object-fit: cover;
  object-position: top center;
  transition: transform .35s;
}
.case-item:hover .case-media img { transform: scale(1.06); }
.case-media .case-badge {
  position: absolute; left: 12px; top: 12px;
  background: rgba(10,77,163,.9); color: #fff;
  font-size: 12px; padding: 3px 12px; border-radius: 16px;
}
.case-media.portrait { height: 230px; }
.case-media.portrait img { object-fit: contain; background: #fff; padding: 8px; }
.case-body { padding: 20px 22px; }
.case-body h3 { font-size: 17px; color: var(--dark); margin-bottom: 6px; }
.case-body p { font-size: 14px; color: var(--text-light); }

/* 联系方式 */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.contact-card { text-align: center; padding: 36px 24px; }
.contact-card .icon { margin: 0 auto 16px; }
.contact-card h3 { font-size: 16px; margin-bottom: 8px; }
.contact-card p { color: var(--text-light); font-size: 15px; }

/* 加入我们 岗位 */
.job-card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; margin-bottom: 24px; border: 1px solid rgba(10,77,163,.05); }
.job-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.job-head h3 { color: var(--primary); font-size: 19px; }
.job-tag { font-size: 12px; background: rgba(10,77,163,.08); color: var(--primary); padding: 3px 12px; border-radius: 20px; }
.job-card h4 { color: var(--dark); font-size: 15px; margin: 14px 0 8px; }
.job-card ul { padding-left: 20px; }
.job-card ul li { list-style: disc; color: var(--text-light); font-size: 16px; margin: 4px 0; }

/* 服务价格 */
.prices { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px,1fr)); gap: 18px; }
.price-card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; border: 1px solid rgba(10,77,163,.05); transition: transform .2s; }
.price-card:hover { transform: translateY(-4px); }
.price-card .name { font-size: 15px; color: var(--dark); margin-bottom: 8px; min-height: 44px; }
.price-card .price { font-size: 24px; font-weight: 800; color: var(--primary); }
.price-card .price small { font-size: 14px; font-weight: 400; color: var(--text-light); }

/* 服务价格分类筛选 */
.price-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 32px;
}
.btn-filter {
  padding: 8px 20px;
  border-radius: 24px;
  border: 1px solid #d6dee8;
  background: #fff;
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: all .2s;
}
.btn-filter:hover { border-color: var(--primary); color: var(--primary); }
.btn-filter.active { background: var(--primary); border-color: var(--primary); color: #fff; }
.price-card.hide { display: none; }

/* 证书展示 */
.cert-box {
  margin-top: 16px;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(10,77,163,.1);
  background: #fff;
}
.cert-box img { width: 100%; height: auto; display: block; }

/* 公司简介 */
.about-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 48px;  }
.about-text p { color: rgba(208, 228, 255, 0.8); text-align:justify; line-height:36px; margin-bottom: 16px; font-size:16px; }
.about-text strong { color: var(--primary); }
.about-text  img{display:block; border-radius:15px; width:100%;}
.about-vision { display: grid; gap: 18px; }
.vision-card { background: var(--white); border-radius: var(--radius); box-shadow: var(--shadow); padding: 24px; border: 1px solid rgba(10,77,163,.05); }
.vision-card h3 { color: var(--primary); margin-bottom: 8px; font-size: 17px; }
.vision-card p { color: var(--text-light); font-size: 16px; }

/* 滚动进场动画 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* 回到顶部 */
.back-to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 90;
  width: 46px; height: 46px; border-radius: 50%; border: none;
  background: var(--primary); color: #fff; font-size: 20px; cursor: pointer;
  box-shadow: 0 6px 18px rgba(10,77,163,.35);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .3s;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover { background: var(--accent); }

/* 响应式 */
@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 12px 24px;
    box-shadow: 0 8px 20px rgba(0,0,0,.08);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero .container { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .hero { padding: 70px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .about-layout { grid-template-columns: 1fr; }
  .contact-cards { grid-template-columns: 1fr; }
  .banner h1 { font-size: 28px; }
}