/* 水木灵思科技有限公司 官网样式
   经典商务风：深蓝为主、白底大留白、克制的分隔线与阴影。
   不用渐变堆砌与 emoji 图标——企业站的可信度来自秩序感，不是花样。 */
:root {
  --navy: #0f3557;
  --navy-deep: #0a2540;
  --navy-mid: #14456f;
  --blue: #1b6fb8;
  --blue-soft: #e9f1f8;
  --ink: #17202e;
  --muted: #5b6b7f;
  --muted-light: #8a97a8;
  --line: #e3e9f0;
  --bg-soft: #f6f9fc;
  --radius: 6px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #fff;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  line-height: 1.75;
  font-size: 15.5px;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
a { color: var(--blue); }

.wrap { width: min(1140px, 100% - 48px); margin-inline: auto; }

/* ---------- 顶栏 ---------- */
.nav {
  position: sticky; top: 0; z-index: 20;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; height: 70px; gap: 36px; }
.logo { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); }
.logo .mark { flex: none; }
.logo .txt b { display: block; font-size: 17px; font-weight: 700; letter-spacing: .08em; line-height: 1.3; }
.logo .txt span { display: block; font-size: 10.5px; color: var(--muted-light); letter-spacing: .16em; text-transform: uppercase; }
.nav nav { margin-left: auto; display: flex; align-items: center; gap: 32px; }
.nav nav a { color: var(--ink); text-decoration: none; font-size: 15px; }
.nav nav a:hover { color: var(--blue); }
.nav .btn { padding: 9px 20px; font-size: 14px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--radius);
  font-size: 15px; font-weight: 600; text-decoration: none;
  border: 1px solid transparent; cursor: pointer; white-space: nowrap;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: #17609f; }
.btn-outline { border-color: rgba(255,255,255,.45); color: #fff; }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: #fff; }
.btn-ghost:hover { border-color: var(--blue); color: var(--blue); }

/* ---------- 区块通用 ---------- */
section { padding: 92px 0; }
.section-head { max-width: 720px; margin-bottom: 52px; }
.kicker {
  font-size: 13px; font-weight: 700; letter-spacing: .18em;
  color: var(--blue); text-transform: uppercase; margin: 0 0 14px;
}
.section-head h2 { font-size: 32px; line-height: 1.4; margin: 0 0 16px; letter-spacing: .01em; }
.section-head p { color: var(--muted); margin: 0; font-size: 16px; }
.bg-soft { background: var(--bg-soft); border-block: 1px solid var(--line); }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(130deg, var(--navy-deep) 0%, var(--navy) 55%, var(--navy-mid) 100%);
  color: #fff; padding: 104px 0 96px; position: relative; overflow: hidden;
}
/* 右上角一层极淡的网格，避免大块纯色显得单薄 */
.hero::after {
  content: ""; position: absolute; inset: 0;
  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: 56px 56px;
  mask-image: radial-gradient(ellipse 70% 60% at 82% 18%, #000 20%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 82% 18%, #000 20%, transparent 72%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 1; max-width: 900px; }
.hero .eyebrow {
  display: inline-block; padding: 6px 15px; border: 1px solid rgba(255,255,255,.28);
  border-radius: 999px; font-size: 13px; letter-spacing: .05em; margin-bottom: 26px;
  color: rgba(255,255,255,.9);
}
.hero h1 { font-size: 44px; line-height: 1.35; margin: 0 0 24px; font-weight: 700; letter-spacing: .01em; }
.hero p { font-size: 17px; color: rgba(255,255,255,.82); margin: 0 0 38px; max-width: 660px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 数字条 ---------- */
.metrics { border-bottom: 1px solid var(--line); }
.metrics .wrap { display: grid; grid-template-columns: repeat(4, 1fr); }
.metrics div { padding: 38px 24px; border-left: 1px solid var(--line); }
.metrics div:first-child { border-left: 0; padding-left: 0; }
.metrics b { display: block; font-size: 30px; color: var(--navy); font-weight: 700; line-height: 1.3; }
.metrics span { font-size: 14px; color: var(--muted); }

/* ---------- 关于我们 ---------- */
.about .wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 68px; align-items: start; }
.about p.body { color: var(--muted); font-size: 16px; margin: 0 0 20px; }
.tenets { margin: 0; padding: 0; list-style: none; }
.tenets li { padding: 22px 0; border-top: 1px solid var(--line); }
.tenets li:last-child { border-bottom: 1px solid var(--line); }
.tenets h4 { margin: 0 0 6px; font-size: 16.5px; display: flex; align-items: baseline; gap: 12px; }
.tenets h4 i {
  font-style: normal; font-size: 12px; font-weight: 700; color: var(--blue);
  letter-spacing: .1em; flex: none;
}
.tenets p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---------- 核心业务 ---------- */
.business { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.biz-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 40px 36px; display: flex; flex-direction: column;
}
.biz-card .no {
  font-size: 12.5px; font-weight: 700; letter-spacing: .16em; color: var(--blue); margin-bottom: 16px;
}
.biz-card h3 { margin: 0 0 14px; font-size: 21px; }
.biz-card > p { margin: 0 0 24px; color: var(--muted); font-size: 15px; }
.biz-card ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.biz-card li {
  padding: 13px 0 13px 22px; border-bottom: 1px solid var(--line);
  font-size: 14.5px; color: var(--muted); position: relative;
}
.biz-card li::before {
  content: ""; position: absolute; left: 2px; top: 22px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--blue); opacity: .55;
}

/* ---------- 技术能力 ---------- */
.tech { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.tech-item { background: #fff; padding: 34px 32px; }
.tech-item .ico { color: var(--blue); margin-bottom: 16px; display: block; }
.tech-item h3 { margin: 0 0 10px; font-size: 17px; }
.tech-item p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---------- 联系 ---------- */
.contact-band {
  background: linear-gradient(130deg, var(--navy-deep), var(--navy-mid));
  color: #fff; padding: 76px 0;
}
.contact-band .wrap { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.contact-band h2 { margin: 0 0 12px; font-size: 28px; }
.contact-band p { margin: 0; color: rgba(255,255,255,.78); max-width: 560px; }
.contact-list { margin: 26px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.contact-list li { color: rgba(255,255,255,.86); font-size: 15px; }
.contact-list b { color: #fff; font-weight: 600; margin-right: 8px; }

/* ---------- 下载 ---------- */
.download-box {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 32px; display: flex; align-items: center; gap: 32px; flex-wrap: wrap;
}
.download-box .meta { flex: 1 1 320px; }
.download-box h3 { margin: 0 0 6px; font-size: 18px; }
.download-box .ver { color: var(--muted); font-size: 14.5px; margin: 0; }
.download-box .hash {
  margin: 10px 0 0; font-size: 11.5px; color: var(--muted-light);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; word-break: break-all;
}
.note { font-size: 13px; color: var(--muted-light); margin-top: 16px; }

/* ---------- 页脚 ---------- */
footer { background: var(--navy-deep); color: rgba(255,255,255,.66); padding: 56px 0 34px; font-size: 14px; }
footer .cols { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 40px; }
footer h4 { color: #fff; font-size: 15px; margin: 0 0 14px; font-weight: 600; }
footer p { margin: 0 0 8px; }
footer a { color: rgba(255,255,255,.66); text-decoration: none; }
footer a:hover { color: #fff; }
footer .corp { color: rgba(255,255,255,.86); font-weight: 600; margin-bottom: 10px; }
footer .beian {
  margin-top: 40px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.12);
  display: flex; justify-content: center; align-items: center; gap: 8px 20px; flex-wrap: wrap;
  font-size: 13px; color: rgba(255,255,255,.5);
}
footer .beian a { color: rgba(255,255,255,.5); }
footer .beian .gongan { display: inline-flex; align-items: center; gap: 5px; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .nav nav { gap: 20px; }
  .nav nav a:not(.btn) { display: none; }
  .hero h1 { font-size: 32px; }
  .about .wrap, .business, .tech, footer .cols { grid-template-columns: 1fr; }
  .about .wrap { gap: 36px; }
  .metrics .wrap { grid-template-columns: 1fr 1fr; }
  .metrics div:nth-child(3) { border-left: 0; padding-left: 0; }
  .metrics div { padding: 26px 20px; }
  section { padding: 64px 0; }
}
@media (max-width: 560px) {
  .metrics .wrap { grid-template-columns: 1fr; }
  .metrics div { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
  .metrics div:first-child { border-top: 0; }
  .hero { padding: 72px 0 64px; }
}