/* ============================================================
   北京秀软科技有限公司 · 官网样式
   www.xiusoft.cn  |  轻量、零外部依赖（无 CDN / 无字体外链）
   ============================================================ */
:root {
  --bg: #ffffff;
  --bg-soft: #f4f7fc;
  --bg-deep: #0c1b33;
  --ink: #0f1c30;
  --ink-2: #4a5c76;
  --ink-3: #7b8ba3;
  --line: #e2e9f3;
  --line-2: #cfdaea;
  --brand: #1a5bd8;
  --brand-d: #12409b;
  --brand-l: #eaf1ff;
  --accent: #0d9d97;
  --accent-l: #e6f7f6;
  --radius: 14px;
  --radius-s: 10px;
  --shadow-s: 0 2px 10px rgba(15, 28, 48, .05);
  --shadow: 0 12px 34px rgba(15, 28, 48, .09);
  --maxw: 1140px;
  --nav-h: 68px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Source Han Sans SC", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3, h4 { line-height: 1.35; font-weight: 750; letter-spacing: -.2px; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .92em; background: var(--bg-soft); border: 1px solid var(--line);
  border-radius: 5px; padding: 1px 6px; color: var(--brand-d);
}

/* ---------------- 顶部导航 ---------------- */
.nav {
  position: sticky; top: 0; z-index: 100; height: var(--nav-h);
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px; height: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.brand { display: flex; align-items: center; gap: 11px; }
.brand .mark {
  width: 34px; height: 34px; flex: 0 0 auto;
  display: block; object-fit: contain;
}
.brand .txt { display: flex; flex-direction: column; line-height: 1.2; }
.brand .txt b { font-size: 16.5px; font-weight: 750; color: var(--ink); letter-spacing: .2px; }
.brand .txt i { font-style: normal; font-size: 11.5px; color: var(--ink-3); letter-spacing: .6px; }
.nav .links { display: flex; align-items: center; gap: 2px; }
.nav .links a {
  color: var(--ink-2); font-size: 15px; padding: 8px 14px; border-radius: var(--radius-s);
  transition: .18s; white-space: nowrap;
}
.nav .links a:hover { color: var(--brand); background: var(--brand-l); text-decoration: none; }
.nav .links a.on { color: var(--brand); font-weight: 650; background: var(--brand-l); }
.nav .links a.nav-cta {
  margin-left: 8px; background: var(--brand); color: #fff; font-weight: 600;
  box-shadow: 0 4px 14px rgba(26, 91, 216, .25);
}
.nav .links a.nav-cta:hover { background: var(--brand-d); color: #fff; }
.burger { display: none; background: none; border: 0; font-size: 24px; color: var(--ink); cursor: pointer; }

/* ---------------- 通用布局 ---------------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { padding: 76px 0; }
section.tight { padding: 52px 0; }
section.soft { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-head { max-width: 760px; margin: 0 auto 42px; text-align: center; }
.sec-head h2 { font-size: 30px; }
.sec-head p { color: var(--ink-2); margin-top: 14px; font-size: 16.5px; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 650; letter-spacing: 1.6px;
  color: var(--brand); background: var(--brand-l); border-radius: 999px;
  padding: 5px 15px; margin-bottom: 14px;
}
.lead { font-size: 17px; color: var(--ink-2); }

/* ---------------- Hero ---------------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 420px at 12% -10%, rgba(26, 91, 216, .10), transparent 62%),
    radial-gradient(760px 380px at 92% 4%, rgba(13, 157, 151, .09), transparent 60%),
    linear-gradient(180deg, #fbfdff, #ffffff);
  border-bottom: 1px solid var(--line);
  padding: 84px 0 78px;
}
.hero-grid {
  display: grid; grid-template-columns: 1.12fr .88fr; gap: 52px; align-items: center;
}
.hero h1 { font-size: clamp(30px, 4vw, 46px); letter-spacing: -.6px; }
.hero h1 em { font-style: normal; color: var(--brand); }
.hero .sub { margin-top: 20px; font-size: 17px; color: var(--ink-2); max-width: 620px; }
.hero .cta { margin-top: 32px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 26px; border-radius: var(--radius-s); font-size: 15.5px; font-weight: 650;
  border: 1px solid transparent; cursor: pointer; transition: .2s;
}
.btn.primary { background: var(--brand); color: #fff; box-shadow: 0 8px 22px rgba(26, 91, 216, .26); }
.btn.primary:hover { background: var(--brand-d); transform: translateY(-1px); text-decoration: none; }
.btn.ghost { border-color: var(--line-2); color: var(--ink); background: #fff; }
.btn.ghost:hover { border-color: var(--brand); color: var(--brand); text-decoration: none; }
.btn.sm { padding: 10px 20px; font-size: 14.5px; }

.hero-stats { margin-top: 38px; display: flex; gap: 34px; flex-wrap: wrap; }
.hero-stats .st b { display: block; font-size: 24px; font-weight: 800; color: var(--ink); letter-spacing: -.4px; }
.hero-stats .st span { font-size: 13.5px; color: var(--ink-3); }

/* 终端演示卡 */
.term {
  background: var(--bg-deep); border-radius: 16px; padding: 18px 18px 20px;
  box-shadow: 0 22px 54px rgba(12, 27, 51, .26); border: 1px solid #1c3459;
}
.term .bar { display: flex; align-items: center; gap: 7px; margin-bottom: 14px; }
.term .bar i { width: 10px; height: 10px; border-radius: 50%; background: #33486b; display: block; }
.term .bar i:nth-child(1) { background: #ff5f57; }
.term .bar i:nth-child(2) { background: #febc2e; }
.term .bar i:nth-child(3) { background: #28c840; }
.term .bar span { margin-left: 8px; font-size: 12px; color: #7f94b4; letter-spacing: .4px; }
.term .row { display: flex; gap: 9px; margin: 10px 0; font-size: 14.2px; line-height: 1.62; }
.term .row .who { flex: 0 0 62px; color: #6d84a8; }
.term .row .who.me { color: #5fb3ff; }
.term .row .say { color: #d7e3f5; }
.term .row .say em { font-style: normal; color: #7fe3d3; }
.term .row.resp .say { color: #9fb4d4; }
.term .row.resp b { color: #7fe3d3; font-weight: 650; }

/* ---------------- 卡片 ---------------- */
.grid { display: grid; gap: 20px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; transition: .22s; box-shadow: var(--shadow-s);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--line-2); }
.card .ico {
  width: 44px; height: 44px; border-radius: 12px; margin-bottom: 15px;
  display: flex; align-items: center; justify-content: center; font-size: 21px;
  background: var(--brand-l); border: 1px solid #d5e3ff;
  color: var(--brand);
}
.card .ico svg { width: 22px; height: 22px; }
.card .ico .stepno { font-size: 20px; font-weight: 800; color: var(--brand); line-height: 1; }
.card .ico.t { background: var(--accent-l); border-color: #cdeeec; color: var(--accent); }
.card .ico.t .stepno { color: var(--accent); }
.card h3 { font-size: 18px; margin-bottom: 9px; }
.card p { color: var(--ink-2); font-size: 14.8px; }
.card ul { margin: 12px 0 0 0; list-style: none; }
.card ul li { position: relative; padding-left: 18px; color: var(--ink-2); font-size: 14.6px; margin-top: 6px; }
.card ul li::before {
  content: ""; position: absolute; left: 4px; top: 11px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--brand); opacity: .55;
}
.num-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 24px; border-radius: 7px; font-size: 12.5px; font-weight: 700;
  background: var(--brand-l); color: var(--brand); margin-right: 9px; flex: 0 0 auto;
}
.tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.tags span {
  font-size: 12.5px; color: var(--ink-2); background: var(--bg-soft);
  border: 1px solid var(--line); border-radius: 999px; padding: 3px 11px;
}

/* ---------------- 深色强调带 ---------------- */
.dark {
  background: var(--bg-deep); color: #e9f0fa; border: 0;
  background-image:
    radial-gradient(700px 320px at 8% 0%, rgba(63, 139, 245, .22), transparent 60%),
    radial-gradient(620px 300px at 96% 100%, rgba(13, 157, 151, .18), transparent 62%);
}
.dark .sec-head h2 { color: #fff; }
.dark .sec-head p { color: #a9bcd6; }
.dark .eyebrow { background: rgba(63, 139, 245, .18); color: #8fbaff; }
.dark .card { background: rgba(255, 255, 255, .062); border-color: rgba(255, 255, 255, .17); box-shadow: none; }
.dark .card:hover { border-color: rgba(143, 186, 255, .55); background: rgba(255, 255, 255, .085); }
.dark .card h3 { color: #fff; }
.dark .card p, .dark .card ul li { color: #a9bcd6; }
.dark .card ul li::before { background: #5fb3ff; opacity: .8; }
.dark .card .ico { background: rgba(63, 139, 245, .16); border-color: rgba(143, 186, 255, .28); color: #8fbaff; }
.dark .card .ico .stepno { color: #8fbaff; }

/* ---------------- 方案块（左右分栏） ---------------- */
.split { display: grid; grid-template-columns: .95fr 1.05fr; gap: 46px; align-items: start; }
.split h2 { font-size: 27px; margin-bottom: 16px; }
.steps { list-style: none; counter-reset: s; }
.steps li {
  counter-increment: s; position: relative; padding: 0 0 22px 46px;
  border-left: 2px solid var(--line); margin-left: 13px;
}
.steps li:last-child { border-left-color: transparent; padding-bottom: 0; }
.steps li::before {
  content: counter(s); position: absolute; left: -14px; top: 0;
  width: 26px; height: 26px; border-radius: 50%; background: var(--brand); color: #fff;
  font-size: 13px; font-weight: 700; display: flex; align-items: center; justify-content: center;
}
.steps li b { display: block; font-size: 16.5px; margin-bottom: 4px; }
.steps li span { color: var(--ink-2); font-size: 14.8px; }

/* ---------------- CTA 带 ---------------- */
.cta-band {
  background: linear-gradient(135deg, var(--brand), #2f7bef 55%, #0d9d97);
  border-radius: 18px; padding: 44px 40px; color: #fff;
  display: flex; align-items: center; justify-content: space-between; gap: 26px; flex-wrap: wrap;
}
.cta-band h3 { font-size: 23px; color: #fff; }
.cta-band p { color: rgba(255, 255, 255, .88); margin-top: 8px; font-size: 15.5px; }
.cta-band .btn { background: #fff; color: var(--brand-d); box-shadow: 0 8px 22px rgba(0, 0, 0, .16); }
.cta-band .btn:hover { background: #f2f6ff; text-decoration: none; }

/* ---------------- 内页头 ---------------- */
.page-head {
  background: linear-gradient(180deg, var(--bg-soft), #fff);
  border-bottom: 1px solid var(--line); padding: 62px 0 54px;
}
.page-head h1 { font-size: clamp(27px, 3.4vw, 38px); }
.page-head p { margin-top: 14px; color: var(--ink-2); font-size: 17px; max-width: 780px; }
.crumb { font-size: 13.5px; color: var(--ink-3); margin-bottom: 12px; }
.crumb a { color: var(--ink-3); }

/* ---------------- 表格 ---------------- */
table.tb { width: 100%; border-collapse: collapse; font-size: 14.8px; }
table.tb th, table.tb td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.tb th { background: var(--bg-soft); font-weight: 650; color: var(--ink); white-space: nowrap; }
table.tb td { color: var(--ink-2); }
table.tb tr:last-child td { border-bottom: 0; }
.tb-wrap { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-s); }

/* ---------------- 提示块 ---------------- */
.note {
  border-left: 3px solid var(--brand); background: var(--brand-l);
  border-radius: 0 var(--radius-s) var(--radius-s) 0; padding: 16px 20px;
  color: #1c3b6e; font-size: 14.8px;
}
.note.warn { border-left-color: #d98a1a; background: #fff6e6; color: #7a4d05; }

/* ---------------- 页脚 ---------------- */
.footer { background: #0a1626; color: #93a6c0; padding: 52px 0 30px; font-size: 14.4px; }
.footer .cols { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 34px; }
.footer h4 { color: #dce6f5; font-size: 15px; margin-bottom: 13px; font-weight: 650; }
.footer a { color: #93a6c0; display: block; padding: 4px 0; }
.footer a:hover { color: #fff; text-decoration: none; }
.footer .about-firm { display: flex; align-items: center; gap: 11px; margin-bottom: 14px; }
.footer .about-firm .mark {
  width: 34px; height: 34px; flex: 0 0 auto; display: block; object-fit: contain;
}
.footer .about-firm b { color: #fff; font-size: 16px; }
.footer .fdesc { color: #7b8ea8; font-size: 13.7px; max-width: 320px; }
.footer .bottom {
  margin-top: 34px; padding-top: 20px; border-top: 1px solid #1b2b42;
  display: flex; justify-content: space-between; gap: 14px; flex-wrap: wrap;
  color: #6f83a0; font-size: 13.4px;
}
.footer .bottom a { display: inline; padding: 0; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .split { grid-template-columns: 1fr; gap: 30px; }
  .g3, .g4 { grid-template-columns: repeat(2, 1fr); }
  .footer .cols { grid-template-columns: 1fr 1fr; gap: 26px; }
}
@media (max-width: 720px) {
  :root { --nav-h: 60px; }
  section { padding: 54px 0; }
  .nav .links {
    display: none; position: absolute; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; background: #fff;
    border-bottom: 1px solid var(--line); padding: 10px 16px 16px; box-shadow: var(--shadow);
  }
  .nav .links.open { display: flex; }
  .nav .links a { padding: 12px 12px; }
  .nav .links a.nav-cta { margin-left: 0; margin-top: 6px; text-align: center; }
  .burger { display: block; }
  .g2, .g3, .g4 { grid-template-columns: 1fr; }
  .cta-band { padding: 32px 24px; }
  .hero { padding: 54px 0 50px; }
  .hero-stats { gap: 24px; }
  .footer .cols { grid-template-columns: 1fr; }
  .sec-head h2 { font-size: 25px; }
}

/* ---------------- 联系方式列表（contact.html） ---------------- */
.clist { margin-top: 15px; border-top: 1px solid var(--line); }
.clist .crow {
  display: flex; align-items: baseline; gap: 12px;
  padding: 9px 0; border-bottom: 1px solid var(--line);
}
.clist .k { flex: 0 0 56px; color: var(--ink-3); font-size: 13.4px; }
.clist .v { color: var(--ink); font-weight: 600; font-size: 15px; word-break: break-all; }
.clist .v a { font-weight: 600; }
.clist .v a:hover { text-decoration: underline; }

/* ---------------- 品牌标识 ---------------- */
.brand-plate {
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 26px; margin-bottom: 20px;
}
.brand-plate img { width: 100%; max-width: 440px; height: auto; }
.firm-logo { width: 124px; height: auto; margin: 6px 0 22px; }