/* ============ FAST-VK 迅维客 · 全站样式（浅色极简风） ============ */
:root {
  --brand: #2563eb;
  --brand-dark: #1d4ed8;
  --brand-light: #eff6ff;
  --ink: #0f172a;
  --ink-2: #334155;
  --ink-3: #64748b;
  --line: #e2e8f0;
  --bg-soft: #f8fafc;
  --radius: 5px;
  --shadow: 0 1px 2px rgba(15, 23, 42, .05), 0 8px 24px -12px rgba(15, 23, 42, .12);
  --shadow-hover: 0 2px 4px rgba(15, 23, 42, .06), 0 16px 40px -12px rgba(37, 99, 235, .22);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", system-ui, sans-serif;
  color: var(--ink); background: #fff; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
.container { width: min(1180px, 92%); margin: 0 auto; }

/* ---------- 顶部 ---------- */
.topbar { background: var(--ink); color: #cbd5e1; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; height: 36px; }
.topbar a { color: #fff; font-weight: 600; letter-spacing: .5px; }
.header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.header .container { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 800; color: var(--ink); }
.logo img { height: 40px; width: auto; }
.logo small { display: block; font-size: 11px; font-weight: 400; color: var(--ink-3); letter-spacing: 2px; line-height: 1; }
.nav { display: flex; gap: 6px; }
.nav > li { position: relative; }
.nav > li > a { display: block; padding: 10px 13px; font-size: 15.5px; font-weight: 500; color: var(--ink-2); border-radius: 6px; transition: .2s; }
.nav > li > a:hover, .nav > li.active > a { color: var(--brand); background: var(--brand-light); }
.nav .sub { position: absolute; top: 100%; left: 8px; min-width: 150px; background: #fff; border: 1px solid var(--line); border-radius: 6px; box-shadow: var(--shadow); padding: 8px; opacity: 0; visibility: hidden; transform: translateY(8px); transition: .2s; }
.nav li:hover .sub { opacity: 1; visibility: visible; transform: translateY(0); }
.nav .sub a { display: block; padding: 9px 14px; font-size: 14px; color: var(--ink-2); border-radius: 5px; }
.nav .sub a:hover { background: var(--brand-light); color: var(--brand); }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; transition: .25s; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; background: linear-gradient(135deg, #f0f6ff 0%, #fdfefe 60%, #eef4ff 100%); }
.hero::before { content: ""; position: absolute; inset: 0; background: var(--banner, none) center/cover no-repeat; animation: heroBg 10s ease-in-out infinite alternate; z-index: 0; }
.hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, #FBFDFF 0%, #FBFDFF 28%, rgba(251,253,255,.88) 48%, rgba(251,253,255,0) 74%); z-index: 1; pointer-events: none; }
.hero > * { position: relative; z-index: 2; }
.hero-inner { padding: 171px 0 156px; max-width: 720px; }
.hero .kicker { display: inline-block; padding: 5px 14px; border-radius: 6px; background: #dbeafe; color: var(--brand-dark); font-size: 13.5px; font-weight: 600; letter-spacing: 1px; margin-bottom: 20px; }
.hero h1 { font-size: clamp(30px, 4.6vw, 50px); line-height: 1.28; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero p.lead { margin-top: 18px; font-size: clamp(15px, 1.6vw, 18px); color: var(--ink-3); max-width: 560px; }
.hero-actions { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
/* 内页 Banner：全站统一高度，左侧文案 + 右侧主题动画 */
.page-hero { background: linear-gradient(120deg, #f0f6ff, #fbfdff); border-bottom: 1px solid var(--line); position: relative; overflow: hidden; }
.page-hero::before { content: ""; position: absolute; inset: 0; background: var(--banner, none) center/cover no-repeat; animation: heroBg 10s ease-in-out infinite alternate; z-index: 0; }
.page-hero::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, #FBFDFF 0%, #FBFDFF 26%, rgba(251,253,255,.85) 46%, rgba(251,253,255,0) 72%); z-index: 1; pointer-events: none; }
.page-hero > * { position: relative; z-index: 2; }
.page-hero .container { display: flex; align-items: center; justify-content: space-between; gap: 40px; min-height: 420px; padding: 44px 0; }
.page-hero h1 { font-size: clamp(24px, 2.9vw, 34px); max-width: 360px; }
.page-hero .crumb { font-size: 13px; color: var(--ink-3); margin-bottom: 14px; }
.page-hero .crumb a:hover { color: var(--brand); }
.page-hero p.sub { margin-top: 12px; color: var(--ink-3); max-width: 360px; line-height: 1.6; }
.hero-visual { flex: none; width: 360px; height: 260px; position: relative; }
.hero-visual svg { width: 100%; height: 100%; overflow: visible; }
.hv-float { animation: hvFloat 4s ease-in-out infinite; }
.hv-spin { transform-origin: center; animation: hvSpin 10s linear infinite; }
.hv-spin-rev { transform-origin: center; animation: hvSpin 14s linear infinite reverse; }
.hv-scan { animation: hvScan 3s ease-in-out infinite; }
.hv-pulse { transform-origin: center; animation: hvPulse 2.4s ease-in-out infinite; }
.hv-dash { stroke-dasharray: 8 6; animation: hvDash 1.6s linear infinite; }
@keyframes hvFloat { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes hvSpin { to { transform: rotate(360deg); } }
@keyframes hvScan { 0%,100% { transform: translateY(-34px); opacity: .15; } 50% { transform: translateY(34px); opacity: .9; } }
@keyframes hvPulse { 0%,100% { transform: scale(1); opacity: .85; } 50% { transform: scale(1.08); opacity: 1; } }
@keyframes hvDash { to { stroke-dashoffset: -28; } }
@media (prefers-reduced-motion: reduce) { .hv-float,.hv-spin,.hv-spin-rev,.hv-scan,.hv-pulse,.hv-dash { animation: none; } }

/* 关于我们 · 联系卡片统一排版 */
.contact-card { text-align: center; display: flex; flex-direction: column; justify-content: flex-start; gap: 0; min-height: 230px; }
.contact-card h3 { margin-bottom: 14px; }
.contact-card .main { font-size: 22px; font-weight: 800; color: var(--brand); line-height: 1.5; min-height: 66px; display: flex; align-items: center; justify-content: center; }
.contact-card .main a { color: inherit; }
.contact-card .sub { font-size: 13.8px; color: var(--ink-3); line-height: 1.9; }

@media (max-width: 900px) {
  .page-hero .container { flex-direction: column; align-items: flex-start; min-height: 0; padding: 48px 0 36px; }
  .hero-visual { display: none; }
}

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 28px; border-radius: 6px; font-size: 15.5px; font-weight: 600; transition: .2s; cursor: pointer; border: none; }
.btn-primary { background: #dbeafe; color: #1d4ed8; box-shadow: 0 8px 20px -8px rgba(37,99,235,.25); }
.btn-primary:hover { background: #bfdbfe; transform: translateY(-1px); }
.btn-ghost { background: #fff; color: #1d4ed8; border: 1.5px solid #93c5fd; }
.btn-ghost:hover { background: #eff6ff; }

/* ---------- 区块 ---------- */
.section { padding: 84px 0; }
.section.alt { background: var(--bg-soft); }
.sec-head { text-align: center; max-width: 640px; margin: 0 auto 52px; }
.sec-head .tag { color: var(--brand); font-weight: 700; font-size: 14px; letter-spacing: 3px; }
.sec-head h2 { font-size: clamp(24px, 3vw, 34px); margin-top: 8px; letter-spacing: 1px; }
.sec-head p { margin-top: 12px; color: var(--ink-3); }

/* 业务卡片 */
.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: 26px; }
.card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 26px; transition: .25s; position: relative; overflow: hidden; }
.card:hover { box-shadow: var(--shadow-hover); border-color: transparent; transform: translateY(-4px); }
.card .ico { width: 54px; height: 54px; border-radius: 6px; background: var(--brand-light); color: var(--brand); display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; }
.card .ico svg { width: 32px; height: 32px; }
.card .ico-img { width: 64px; height: 64px; display: flex; align-items: center; justify-content: center; margin: 0 auto 18px; }
.card .ico-img img { width: 100%; height: 100%; object-fit: contain; }
.cards-center { text-align: center; }
/* 统一：卡片文字居中。排除带 ul 的列表卡（如 it 页管理端/服务端）保持左对齐 */
.card:not(:has(ul)) { text-align: center; }
.cards-center .card h3 { font-size: 17px; margin-bottom: 10px; }
.cards-center .card p { font-size: 14px; line-height: 1.65; min-height: 3.3em; }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--ink-3); }
.card .more { display: inline-flex; align-items: center; gap: 5px; margin-top: 16px; color: var(--brand); font-size: 14px; font-weight: 600; }
.card .more::after { content: "→"; transition: .2s; }
.card:hover .more::after { transform: translateX(4px); }


/* 案例卡片 */
.case-card { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #fff; transition: .25s; }
.case-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.case-card .thumb { aspect-ratio: 4/3; overflow: hidden; background: var(--bg-soft); }
.case-card .thumb img { width: 100%; height: 100%; object-fit: cover; transition: .4s; }
.case-card:hover .thumb img { transform: scale(1.05); }
.case-card .body { padding: 20px 22px 24px; }
.case-card h3 { font-size: 17px; line-height: 1.45; }
.case-card p { margin-top: 8px; font-size: 13.8px; color: var(--ink-3); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.case-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
.case-tags i { font-style: normal; font-size: 12px; color: var(--brand-dark); background: var(--brand-light); border-radius: 6px; padding: 2.5px 11px; }

/* 案例筛选 */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 40px; }
.filter-bar button { padding: 8px 20px; border-radius: 6px; border: 1px solid var(--line); background: #fff; color: var(--ink-2); font-size: 14px; cursor: pointer; transition: .2s; }
.filter-bar button.on, .filter-bar button:hover { background: #dbeafe; border-color: #93c5fd; color: #1d4ed8; }

/* 子系统列表 */
.sys-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.sys-item { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; padding: 26px 20px; border: 1px solid var(--line); border-radius: 6px; background: #fff; font-weight: 600; font-size: 15px; text-align: center; transition: .2s; }
.sys-item:hover { border-color: var(--brand); color: var(--brand); box-shadow: var(--shadow); }
.sys-item svg, .sys-item img { width: 42px; height: 42px; color: var(--brand); flex: none; }
.sys-item img { object-fit: contain; }

/* SLA 数字卡 */
.sla-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.sla { text-align: center; padding: 34px 18px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.sla b { display: block; font-size: clamp(28px, 3vw, 40px); color: var(--brand); }
.sla b small { font-size: 16px; font-weight: 600; }
.sla span { display: block; margin-top: 8px; color: var(--ink-2); font-size: 15px; font-weight: 600; }
.sla p { margin-top: 6px; font-size: 13px; color: var(--ink-3); }

/* 步骤流 */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; counter-reset: step; }
.step { position: relative; padding: 26px 20px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.step::before { counter-increment: step; content: "0" counter(step); font-size: 30px; font-weight: 800; color: #dbeafe; -webkit-text-stroke: 1px var(--brand); display: block; margin-bottom: 12px; }
.step h4 { font-size: 16.5px; margin-bottom: 6px; }
.step p { font-size: 13.5px; color: var(--ink-3); }

/* 表格 */
.tbl { width: 100%; border-collapse: collapse; background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); font-size: 14.5px; }
.tbl th, .tbl td { padding: 15px 20px; text-align: left; border-bottom: 1px solid var(--line); }
.tbl th { background: var(--brand-light); color: var(--brand-dark); font-weight: 700; white-space: nowrap; }
.tbl tr:last-child td { border-bottom: none; }
.tbl td:not(:first-child) { color: var(--ink-2); }

/* FAQ */
.faq details { border: 1px solid var(--line); border-radius: 6px; background: #fff; margin-bottom: 12px; overflow: hidden; }
.faq summary { padding: 17px 22px; font-weight: 600; font-size: 15.5px; cursor: pointer; list-style: none; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 22px; color: var(--brand); font-size: 20px; transition: .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 22px 18px; color: var(--ink-3); font-size: 14.5px; }


/* CTA + 表单 */
.cta-band { background: linear-gradient(120deg, var(--brand-dark), var(--brand)); border-radius: 6px; color: #fff; padding: 56px 48px; display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-band h2 { font-size: clamp(22px, 2.6vw, 30px); }
.cta-band p { margin-top: 8px; opacity: .85; }
.contact-form { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 6px; padding: 38px; max-width: 720px; margin: 0 auto; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 7px; }
.field input, .field textarea, .field select { width: 100%; padding: 12px 15px; border: 1.5px solid var(--line); border-radius: 6px; font-size: 15px; font-family: inherit; background: #fff; transition: .2s; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(37,99,235,.12); }
.form-msg { margin-top: 14px; font-size: 14.5px; font-weight: 600; display: none; }
.form-msg.ok { display: block; color: #15803d; }
.form-msg.err { display: block; color: #dc2626; }

/* 页脚 — 深色科技风 */
.footer { background: #0b1220; color: #94a3b8; padding: 68px 0 0; margin-top: 90px; }
.footer .cols {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr 0.9fr 1.1fr; /* 左右稍宽(简介/联系)，中间收窄 */
  column-gap: 44px;                          /* 栏间距统一 */
  padding-bottom: 56px;
}

/* 栏目标题：白色加粗 */
.footer h4 {
  color: #f8fafc;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .04em;
  margin-bottom: 22px;
}

/* 第一栏：品牌简介 */
.footer .f-brand .logo img {
  height: 38px;
  width: auto;
  display: block;
  /* 深色底上保持彩色：去掉白色滤镜，加投影让图标透出、文字可读 */
  filter: drop-shadow(0 1px 2px rgba(0,0,0,.45));
  opacity: 1;
  transition: opacity .2s;
}
.footer .f-brand .logo:hover img { opacity: 1; }
.footer .f-intro {
  font-size: 14px;
  line-height: 1.85;
  margin-top: 20px;
  padding-right: 26px;
  max-width: 230px;   /* 限宽：不撑满栏宽，让第一二栏视觉空隙与二三栏一致 */
  color: #94a3b8;
}

/* 第二、三栏：导航链接（垂直单列、行高拉开） */
.footer .f-nav ul,
.footer .f-contact-list { list-style: none; }
.footer .f-nav li { margin-bottom: 15px; font-size: 14px; line-height: 1.75; }
.footer .f-nav a {
  color: #a9bddb;
  text-decoration: none;
  transition: color .2s;
}
.footer .f-nav a:hover { color: #5b9dff; }

/* 第四栏：联系我们 — 标签固定宽、值从统一位置对齐、地址在值列内换行 */
.footer .f-contact-list li {
  margin-bottom: 16px;
  font-size: 14px;
  line-height: 1.65;
  display: grid;
  grid-template-columns: 4.2em 1fr;  /* 标签固定约4字宽，值列剩余 */
  align-items: baseline;
}
/* 标签列：定宽 + 两端对齐，两字标签(直线/邮箱/地址)自动拉开到与「服务热线」四字等宽，不拆字 */
.footer .f-contact-list li > span:first-child {
  color: #64748b;
  font-size: 13px;
  width: 4.2em;
  display: flex;
  justify-content: space-between; /* 两字推到头尾，中间留空，与四字等宽 */
}
.footer .f-contact-list strong,
.footer .f-contact-list a { color: #e2e8f0; word-break: break-word; }
.footer .f-contact-list a:hover { color: #5b9dff; }

/* 通栏版权条 */
.foot-bar {
  background: #070d18;
  border-top: 1px solid #1e293b;
  padding: 18px 0;
}
.foot-bar .container {
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  font-size: 13px;
  color: #64748b;
}
.foot-bar a { color: #94a3b8; }

/* 浮动咨询 */
.float-contact { position: fixed; right: 18px; bottom: 18px; z-index: 90; display: flex; flex-direction: column; gap: 10px; }
.float-contact a { width: 52px; height: 52px; border-radius: 6px; background: var(--brand); color: #fff; display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-hover); transition: .2s; font-size: 13px; font-weight: 700; text-align: center; line-height: 1.2; }
.float-contact a.tel { background: #fff; color: var(--brand); border: 1.5px solid var(--brand); }
.float-contact a:hover { transform: scale(1.06); }

/* 微信浮动按钮 hover 弹出二维码 */
.float-contact .float-wx { position: relative; }
.float-contact .wx-pop {
  position: absolute;
  right: 64px;
  bottom: 0;
  width: 148px;
  background: #fff;
  border-radius: 6px;
  padding: 10px;
  box-shadow: 0 10px 30px rgba(0,0,0,.18);
  opacity: 0;
  visibility: hidden;
  transform: translateX(10px);
  transition: .25s;
  text-align: center;
  white-space: normal;
}
.float-contact .wx-pop img { width: 120px; height: 120px; max-width: 120px; display: block; border-radius: 6px; }
.float-contact .wx-pop span { display: block; margin-top: 8px; font-size: 12px; color: #475569; }
.float-contact .float-wx:hover .wx-pop { opacity: 1; visibility: visible; transform: translateX(0); }

/* 动效（仅 JS 可用时启用；无 JS/打印场景内容直接可见） */
html.js .reveal { opacity: 0; will-change: transform, opacity, filter, clip-path; }
html.js .reveal.in { opacity: 1; transform: none; filter: none; clip-path: none; animation-duration: .9s; animation-timing-function: cubic-bezier(.22,.61,.36,1); animation-fill-mode: both; animation-delay: var(--rd, 0s); }

/* 各随机入场效果（JS 为每个 .reveal 随机加对应 class 触发）— 共 14 种 */
html.js .reveal.r-fade.in     { animation-name: rvFade; }
html.js .reveal.r-up.in       { animation-name: rvUp; }
html.js .reveal.r-down.in     { animation-name: rvDown; }
html.js .reveal.r-left.in     { animation-name: rvLeft; }
html.js .reveal.r-right.in    { animation-name: rvRight; }
html.js .reveal.r-zoom.in     { animation-name: rvZoom; }
html.js .reveal.r-rotate.in   { animation-name: rvRotate; }
html.js .reveal.r-skew.in     { animation-name: rvSkew; }
html.js .reveal.r-pop.in      { animation-name: rvPop; }
html.js .reveal.r-flip.in     { animation-name: rvFlip; }
html.js .reveal.r-converge.in { animation-name: rvConverge; }
html.js .reveal.r-mosaic.in   { animation-name: rvMosaic; }
html.js .reveal.r-clipup.in   { animation-name: rvClipUp; }
html.js .reveal.r-circle.in   { animation-name: rvCircle; }

@keyframes rvFade     { from { opacity: 0; } to { opacity: 1; } }
@keyframes rvUp       { from { opacity: 0; transform: translateY(46px); } to { opacity: 1; transform: none; } }
@keyframes rvDown     { from { opacity: 0; transform: translateY(-46px); } to { opacity: 1; transform: none; } }
@keyframes rvLeft     { from { opacity: 0; transform: translateX(-66px); } to { opacity: 1; transform: none; } }
@keyframes rvRight    { from { opacity: 0; transform: translateX(66px); } to { opacity: 1; transform: none; } }
@keyframes rvZoom     { from { opacity: 0; transform: scale(.82); } to { opacity: 1; transform: scale(1); } }
@keyframes rvRotate   { from { opacity: 0; transform: rotate(-9deg) scale(.92); } to { opacity: 1; transform: none; } }
@keyframes rvSkew     { from { opacity: 0; transform: skewY(7deg) translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes rvPop      { 0% { opacity: 0; transform: scale(.4); } 65% { opacity: 1; transform: scale(1.07); } 100% { transform: scale(1); } }
@keyframes rvFlip     { from { opacity: 0; transform: perspective(900px) rotateY(85deg); } to { opacity: 1; transform: perspective(900px) rotateY(0); } }
@keyframes rvConverge { from { opacity: 0; clip-path: inset(0 50% 0 50%); } to { opacity: 1; clip-path: inset(0 0 0 0); } }
@keyframes rvMosaic   { from { opacity: 0; filter: blur(14px) contrast(1.5); transform: scale(1.04); } to { opacity: 1; filter: blur(0) contrast(1); transform: none; } }
@keyframes rvClipUp   { from { opacity: 0; clip-path: inset(100% 0 0 0); } to { opacity: 1; clip-path: inset(0 0 0 0); } }
@keyframes rvCircle   { from { opacity: 0; clip-path: circle(0% at 50% 50%); } to { opacity: 1; clip-path: circle(150% at 50% 50%); } }

/* 首屏开片：级联渐入 */
@keyframes heroIn { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: none; } }
.hero .kicker, .hero h1, .hero p.lead, .hero-actions { animation: heroIn .9s both cubic-bezier(.22,.61,.36,1); }
.hero .kicker { animation-delay: .05s; }
.hero h1 { animation-delay: .18s; }
.hero p.lead { animation-delay: .34s; }
.hero-actions { animation-delay: .5s; }
/* 首屏背景动态：镜头横移 + 轻微缩放（明显动感） */
.hero { }
@keyframes heroBg { 0% { transform: translateX(-3.2%); } 100% { transform: translateX(3.2%); } }

@media print { html.js .reveal { opacity: 1 !important; transform: none !important; filter: none !important; clip-path: none !important; animation: none !important; } }
@media (prefers-reduced-motion: reduce) {
  .hv-float,.hv-spin,.hv-spin-rev,.hv-scan,.hv-pulse,.hv-dash,
  .hero,.page-hero,.hero .kicker,.hero h1,.hero p.lead,.hero-actions { animation: none !important; }
  html.js .reveal { opacity: 1 !important; transform: none !important; filter: none !important; clip-path: none !important; animation: none !important; transition: none !important; }
}

/* 响应式 */
@media (max-width: 960px) {
  .grid-4, .sys-list, .sla-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer .cols { grid-template-columns: 1fr 1fr; }
  .footer .cols > div:nth-child(3) { margin-left: 0; }
  .footer .f-intro { padding-right: 0; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav { position: absolute; top: 72px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; padding: 12px 4%; gap: 2px; display: none; box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .nav .sub { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; border: none; padding: 0 0 0 18px; }
  .hero-inner { padding: 113px 0; }
  .section { padding: 58px 0; }
  .grid-4, .grid-3, .grid-2, .sys-list, .sla-grid, .steps, .form-row { grid-template-columns: 1fr; }
  .footer .cols { grid-template-columns: 1fr; gap: 28px; }
  .footer .cols > div:nth-child(3) { margin-left: 0; }
  .footer .f-intro { padding-right: 0; }
  .cta-band { padding: 40px 26px; }
  .contact-form { padding: 26px 20px; }
}


/* 窄屏：隐藏 Banner 背景图，保证文字可读性 */
@media (max-width: 900px) {
  .page-hero[style], .hero[style] {
    background: linear-gradient(120deg, #f0f6ff, #fbfdff) !important;
  }
}