/* ====== 爱得科技 官网样式 ====== */
:root {
  --primary: #2563eb;
  --primary-2: #06b6d4;
  --dark: #0b1526;
  --dark-2: #101f38;
  --text: #1e293b;
  --muted: #5b6b80;
  --bg: #ffffff;
  --bg-soft: #f4f7fb;
  --line: #e5eaf2;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 23, 42, .08);
  --grad: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  font-size: 16px;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
ul, ol { list-style: none; }
.container { width: min(1180px, 92%); margin: 0 auto; }

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s;
}
.site-header.scrolled { box-shadow: 0 6px 20px rgba(15, 23, 42, .08); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { width: 38px; height: 38px; }
.logo-text { font-size: 20px; font-weight: 700; color: var(--dark); line-height: 1.2; }
.logo-text em { display: block; font-style: normal; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: 2px; }

.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav > a {
  padding: 8px 13px; border-radius: 8px; color: var(--text);
  font-size: 15px; font-weight: 500; transition: all .2s;
}
.main-nav > a:hover { color: var(--primary); background: var(--bg-soft); }
.main-nav > a.active { color: var(--primary); background: var(--bg-soft); }
.nav-cta {
  background: var(--grad) !important; color: #fff !important;
  padding: 9px 18px !important; border-radius: 999px !important;
  box-shadow: 0 4px 14px rgba(37, 99, 235, .35);
}
.nav-cta:hover { filter: brightness(1.08); background: var(--grad) !important; }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--dark); margin: 5px 0; border-radius: 2px; transition: .25s; }

/* ===== Hero ===== */
.hero {
  background: radial-gradient(1100px 500px at 80% -10%, rgba(6, 182, 212, .25), transparent 60%),
              radial-gradient(900px 480px at 8% 110%, rgba(37, 99, 235, .3), transparent 55%),
              var(--dark);
  color: #fff; padding: 96px 0 88px;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0; opacity: .5; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 44px 44px;
}
.hero .container { position: relative; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(255, 255, 255, .25); border-radius: 999px;
  padding: 6px 16px; font-size: 13px; color: #cfe3ff;
  background: rgba(255, 255, 255, .06); margin-bottom: 22px;
}
.hero h1 { font-size: clamp(30px, 4.6vw, 50px); line-height: 1.28; font-weight: 800; letter-spacing: 1px; }
.hero h1 .grad-text { background: linear-gradient(90deg, #60a5fa, #22d3ee); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero p.lead { margin-top: 18px; font-size: clamp(15px, 1.6vw, 18px); color: #b9c7da; max-width: 720px; }
.hero-actions { margin-top: 34px; display: flex; flex-wrap: wrap; gap: 14px; }
.hero-stats { margin-top: 54px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; max-width: 860px; }
.hero-stat { border-left: 2px solid rgba(96, 165, 250, .55); padding-left: 16px; }
.hero-stat b { display: block; font-size: 24px; color: #fff; }
.hero-stat span { font-size: 13px; color: #93a5bf; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 999px; font-size: 15px; font-weight: 600;
  transition: all .2s; cursor: pointer; border: 0;
}
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 6px 18px rgba(37, 99, 235, .35); }
.btn-primary:hover { transform: translateY(-2px); filter: brightness(1.06); }
.btn-ghost { border: 1px solid rgba(255, 255, 255, .4); color: #fff; }
.btn-ghost:hover { background: rgba(255, 255, 255, .1); }
.btn-outline { border: 1.5px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }

/* ===== 通用 Section ===== */
.section { padding: 84px 0; }
.section.soft { background: var(--bg-soft); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 52px; }
.section-head .kicker {
  display: inline-block; color: var(--primary); font-weight: 700;
  font-size: 14px; letter-spacing: 3px; margin-bottom: 12px;
}
.section-head h2 { font-size: clamp(24px, 3vw, 34px); color: var(--dark); font-weight: 800; }
.section-head p { margin-top: 14px; color: var(--muted); }

/* ===== 卡片网格 ===== */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; transition: all .25s; position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card .icon {
  width: 54px; height: 54px; border-radius: 14px; background: var(--grad);
  display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
  box-shadow: 0 6px 16px rgba(37, 99, 235, .28);
}
.card .icon svg { width: 28px; height: 28px; stroke: #fff; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { font-size: 19px; color: var(--dark); margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 14.5px; }
.card .more { display: inline-block; margin-top: 16px; font-weight: 600; font-size: 14px; }

/* ===== 服务卡片（浅色底专用） ===== */
.soft .card { border-color: transparent; box-shadow: 0 4px 16px rgba(15, 23, 42, .05); }

/* ===== 特性列表 ===== */
.feature-item { display: flex; gap: 16px; align-items: flex-start; }
.feature-item .icon {
  flex: 0 0 46px; width: 46px; height: 46px; border-radius: 12px;
  background: rgba(37, 99, 235, .1); display: flex; align-items: center; justify-content: center;
}
.feature-item .icon svg { width: 24px; height: 24px; stroke: var(--primary); fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.feature-item h3 { font-size: 17px; color: var(--dark); margin-bottom: 6px; }
.feature-item p { color: var(--muted); font-size: 14.5px; }

/* ===== 流程步骤 ===== */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; counter-reset: step; }
.step { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 18px; text-align: center; position: relative; }
.step::before {
  counter-increment: step; content: "0" counter(step);
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--grad); color: #fff; font-weight: 800; font-size: 15px; margin-bottom: 14px;
}
.step h3 { font-size: 16px; color: var(--dark); margin-bottom: 8px; }
.step p { font-size: 13.5px; color: var(--muted); }

/* ===== 业务中心 ===== */
.city-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.city-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; text-align: center; transition: all .25s; }
.city-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.city-card .flag { font-size: 15px; font-weight: 800; color: var(--dark); margin-bottom: 6px; }
.city-card .tag { display: inline-block; font-size: 12px; padding: 2px 10px; border-radius: 999px; background: rgba(37, 99, 235, .1); color: var(--primary); margin-bottom: 12px; }
.city-card p { font-size: 13.5px; color: var(--muted); }
.city-card a.tel { font-size: 17px; font-weight: 800; color: var(--dark); }

/* ===== FAQ ===== */
.faq { max-width: 860px; margin: 0 auto; }
.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  margin-bottom: 14px; overflow: hidden; transition: all .2s;
}
.faq details[open] { border-color: rgba(37, 99, 235, .45); box-shadow: 0 6px 18px rgba(37, 99, 235, .08); }
.faq summary {
  cursor: pointer; padding: 18px 22px; font-weight: 600; color: var(--dark);
  font-size: 16px; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 22px; color: var(--primary); font-weight: 400; flex: 0 0 auto; transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .faq-a { padding: 0 22px 20px; color: var(--muted); font-size: 15px; }

/* ===== CTA 横幅 ===== */
.cta-band {
  background: radial-gradient(800px 300px at 15% 0%, rgba(6, 182, 212, .3), transparent 55%), var(--dark);
  color: #fff; padding: 70px 0; text-align: center;
}
.cta-band h2 { font-size: clamp(22px, 3vw, 32px); font-weight: 800; }
.cta-band p { margin: 14px 0 30px; color: #b9c7da; }
.cta-band .phone { color: #fff; font-size: 26px; font-weight: 800; letter-spacing: 1px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ===== 页面 Hero（内页） ===== */
.page-hero {
  background: radial-gradient(900px 380px at 85% -20%, rgba(6, 182, 212, .28), transparent 60%), var(--dark);
  color: #fff; padding: 70px 0 64px; position: relative; overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0; opacity: .4; pointer-events: none;
  background-image: linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 44px 44px;
}
.page-hero .container { position: relative; }
.breadcrumb { font-size: 13.5px; color: #8fa2bd; margin-bottom: 16px; }
.breadcrumb a { color: #b9c7da; }
.breadcrumb a:hover { color: #fff; }
.page-hero h1 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 800; }
.page-hero .sub { margin-top: 14px; color: #b9c7da; max-width: 720px; font-size: 16px; }

/* ===== 内容块 ===== */
.content-block h2 { font-size: clamp(22px, 2.6vw, 30px); color: var(--dark); margin-bottom: 18px; }
.content-block h3 { font-size: 18px; color: var(--dark); margin-bottom: 10px; }
.content-block p { color: var(--muted); margin-bottom: 14px; }
.check-list li {
  position: relative; padding: 10px 0 10px 30px; color: var(--text); font-size: 15px;
  border-bottom: 1px dashed var(--line);
}
.check-list li::before {
  content: "✓"; position: absolute; left: 2px; top: 10px;
  width: 20px; height: 20px; border-radius: 50%; background: rgba(6, 182, 212, .12);
  color: var(--primary-2); font-size: 12px; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
}
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.tag-cloud span {
  background: var(--bg-soft); border: 1px solid var(--line); color: var(--text);
  padding: 7px 16px; border-radius: 999px; font-size: 14px;
}

/* ===== 联系页 ===== */
.contact-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; text-align: center; transition: all .25s; }
.contact-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.contact-card h3 { font-size: 18px; color: var(--dark); margin-bottom: 8px; }
.contact-card .tel { font-size: 22px; font-weight: 800; color: var(--primary); display: block; margin: 8px 0; }
.contact-card p { color: var(--muted); font-size: 14px; }

/* ===== 页脚 ===== */
.site-footer { background: var(--dark); color: #93a5bf; padding: 64px 0 0; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 36px; padding-bottom: 44px; }
.site-footer h4 { color: #fff; font-size: 16px; margin-bottom: 18px; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { color: #93a5bf; }
.site-footer a:hover { color: #fff; }
.footer-about p { margin-top: 14px; line-height: 1.8; }
.footer-tel { margin-top: 14px; font-size: 20px; font-weight: 800; color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08); padding: 20px 0;
  text-align: center; font-size: 13px; color: #6d7f99;
}
.footer-bottom a { color: #6d7f99; }
.footer-bottom a:hover { color: #fff; }

/* ===== 悬浮咨询按钮 ===== */
.float-consult {
  position: fixed; right: 22px; bottom: 26px; z-index: 90;
  display: flex; align-items: center; gap: 8px;
  background: var(--grad); color: #fff; font-weight: 700; font-size: 15px;
  padding: 13px 22px; border-radius: 999px;
  box-shadow: 0 8px 24px rgba(37, 99, 235, .45);
  transition: transform .2s;
}
.float-consult:hover { transform: translateY(-3px); }
.float-consult svg { width: 18px; height: 18px; stroke: #fff; fill: none; stroke-width: 2; }

/* ===== 进场动画（仅在 JS 可用时隐藏，保证无 JS 也能正常显示） ===== */
.js-anim .reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.js-anim .reveal.visible { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 1020px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .city-grid { grid-template-columns: repeat(3, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed; top: 68px; left: 0; right: 0; z-index: 99;
    background: #fff; flex-direction: column; align-items: stretch;
    padding: 14px 5%; gap: 4px; border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 30px rgba(15, 23, 42, .12);
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav > a { padding: 13px 10px; border-radius: 10px; }
  .nav-cta { text-align: center; margin-top: 8px; }
  .nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .hero { padding: 70px 0 64px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 64px 0; }
}
@media (max-width: 600px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .city-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .steps { grid-template-columns: 1fr; }
  .float-consult { right: 14px; bottom: 16px; padding: 12px 18px; }
}