/* ==========================================================================
   站名口径：断缘技术站（域名 www.pxpz.com）
   主题：深藏青 #12305b + 金铜 #a8823f
   纯手写 CSS · 无框架 / 无第三方库 / 无 CDN / 无外部字体
   ========================================================================== */

:root {
  --navy: #12305b;
  --navy-d: #0b2144;
  --navy-l: #1d477f;
  --gold: #a8823f;
  --gold-l: #c9a35c;
  --gold-s: #f3ecdf;
  --bg: #f2f5fa;
  --card: #ffffff;
  --text: #1f2d3d;
  --muted: #5f6b78;
  --line: #e3e9f1;
  --radius: 12px;
  --radius-s: 8px;
  --shadow: 0 2px 10px rgba(18, 48, 91, .07);
  --shadow-l: 0 10px 30px rgba(18, 48, 91, .14);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC",
               "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.65;
}

a { color: var(--navy); text-decoration: none; }
a:hover { color: var(--gold); }
h1, h2, h3, h4 { margin: 0 0 .4em; line-height: 1.35; font-weight: 700; }
p { margin: 0 0 .7em; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; }
.muted { color: var(--muted); }
.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 18px; }

/* ---------------- 顶栏 ---------------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: linear-gradient(100deg, var(--navy) 0%, var(--navy-d) 62%, #16305a 100%);
  border-bottom: 3px solid var(--gold);
}
.bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  min-height: 64px;
}
.brand { display: flex; align-items: center; gap: 11px; color: #fff; }
.brand:hover { color: #fff; }
.brand-mark {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border: 1.5px solid var(--gold-l);
  border-radius: 9px;
  background: rgba(168, 130, 63, .18);
  color: var(--gold-l);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 16.5px; letter-spacing: .5px; }
.brand-text em {
  font-style: normal;
  font-size: 10.5px;
  letter-spacing: .8px;
  color: #b9c7dc;
  text-transform: uppercase;
}
.mainnav { display: flex; align-items: center; gap: 4px; }
.mainnav a {
  color: #dce5f2;
  font-size: 13.5px;
  padding: 7px 11px;
  border-radius: var(--radius-s);
  white-space: nowrap;
}
.mainnav a:hover { color: #fff; background: rgba(255, 255, 255, .1); }
.mainnav a.on { color: var(--navy); background: var(--gold-l); }

/* ---------------- 英雄区 ---------------- */
.hero {
  position: relative;
  overflow: hidden;
  margin: 22px 0 0;
  padding: 40px 38px 34px;
  border-radius: 16px;
  background:
    radial-gradient(760px 320px at 88% -10%, rgba(168, 130, 63, .28), rgba(168, 130, 63, 0) 62%),
    linear-gradient(118deg, var(--navy-d) 0%, var(--navy) 52%, #173f77 100%);
  color: #fff;
  box-shadow: var(--shadow-l);
  border: 1px solid rgba(201, 163, 92, .3);
}
.hero h1 {
  margin: 0 0 12px;
  font-size: 40px;
  letter-spacing: 1px;
}
.hero h1 .hl { color: var(--gold-l); }
.hero-sub {
  max-width: 900px;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: #cdd9ea;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, .14);
}
.hero-stats li {
  padding: 14px 16px;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(201, 163, 92, .28);
}
.hero-stats strong {
  display: block;
  font-size: 27px;
  line-height: 1.2;
  color: var(--gold-l);
  letter-spacing: .5px;
}
.hero-stats strong small { font-size: 14px; font-weight: 700; margin-left: 3px; }
.hero-stats span { display: block; font-size: 12.5px; color: #c6d2e4; margin-top: 3px; }

/* ---------------- 区块通用 ---------------- */
.sec { margin: 44px 0 0; }
.sec-head { margin-bottom: 16px; }
.sec-title {
  position: relative;
  margin: 0 0 6px;
  padding-left: 13px;
  font-size: 20px;
  color: var(--navy);
}
.sec-title::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 19px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold-l), var(--gold));
}
.sec-note { margin: 0; color: var(--muted); font-size: 13px; }
.grid { display: grid; gap: 18px; }
.grid-cases { grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
.grid-svc { grid-template-columns: repeat(auto-fit, minmax(268px, 1fr)); }
.grid-steps { grid-template-columns: repeat(auto-fit, minmax(268px, 1fr)); }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ---------------- 案例卡 ---------------- */
.case-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.case-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-l);
  border-color: rgba(168, 130, 63, .45);
}
.shot {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: #eef2f8;
  border-bottom: 1px solid var(--line);
}
.shot img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 750;
  object-fit: cover;
  transition: transform .35s ease;
}
.case-card:hover .shot img { transform: scale(1.025); }
.shot-note {
  position: absolute;
  right: 8px; bottom: 8px;
  padding: 3px 9px;
  border-radius: 999px;
  background: rgba(11, 33, 68, .84);
  color: #f0e6d4;
  font-size: 10.5px;
  line-height: 1.5;
  letter-spacing: .2px;
}
.case-body {
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
  padding: 15px 16px 16px;
}
.case-title { margin: 0 0 7px; font-size: 16px; color: var(--navy); }
.case-desc { margin: 0 0 11px; font-size: 13.5px; color: #55636f; }
.tags { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 0 14px; }
.tags li {
  padding: 2.5px 9px;
  border-radius: 999px;
  background: var(--gold-s);
  border: 1px solid #e6d9be;
  color: #7d5f22;
  font-size: 11.5px;
  line-height: 1.7;
}
.case-foot {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}
.go {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--radius-s);
  background: var(--navy);
  color: #fff;
  font-size: 13px;
  transition: background .16s ease;
}
.go:hover { background: var(--gold); color: #fff; }
.lnk-hint { color: #5b6674; font-size: 12.5px; }
.case-foot.plain { border-top: 1px dashed var(--line); }
.case-foot .noded {
  color: var(--muted);
  font-size: 12.5px;
}

/* ---------------- 服务卡 ---------------- */
.svc-card { padding: 18px 18px 16px; }
.svc-head { display: flex; align-items: center; gap: 10px; margin-bottom: 9px; }
.svc-no {
  flex: 0 0 auto;
  width: 30px; height: 30px;
  display: grid; place-items: center;
  border-radius: 8px;
  background: linear-gradient(140deg, var(--navy-l), var(--navy));
  color: var(--gold-l);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .3px;
}
.svc-card h3 { margin: 0; font-size: 16px; color: var(--navy); }
.svc-card p { font-size: 13.5px; color: #55636f; margin: 0 0 10px; }
.dots li {
  position: relative;
  padding-left: 15px;
  margin-bottom: 5px;
  font-size: 13px;
  color: #46535f;
}
.dots li::before {
  content: "";
  position: absolute;
  left: 2px; top: .68em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

/* ---------------- 工作方式 ---------------- */
.step-card { padding: 18px 18px 16px; }
.step-card h3 { margin: 0 0 7px; font-size: 15.5px; color: var(--navy); }
.step-card p { margin: 0; font-size: 13px; color: #55636f; }
.step-no {
  display: inline-grid;
  place-items: center;
  width: 28px; height: 28px;
  margin-bottom: 10px;
  border-radius: 50%;
  border: 1.5px solid var(--gold);
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
}

/* ---------------- 页脚 ---------------- */
.foot {
  margin-top: 48px;
  padding: 30px 0 34px;
  background: linear-gradient(100deg, var(--navy-d), var(--navy));
  border-top: 3px solid var(--gold);
  color: #cdd9ea;
}
.foot-inner { text-align: center; }
.foot-inner p { margin: 0 0 8px; }
.foot-lead {
  font-size: 14.5px;
  color: #fff;
  font-weight: 700;
  letter-spacing: .3px;
}
.foot-line { font-size: 13px; color: #b9c7dc; }
.foot-contact {
  margin-top: 14px !important;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  font-size: 14px;
  color: var(--gold-l);
}
.foot-tech { margin: 10px 0 0; font-size: 11.5px; color: #8fa1bb; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 860px) {
  .hero { padding: 30px 22px 26px; }
  .hero h1 { font-size: 31px; }
  .grid-cases { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
}

@media (max-width: 640px) {
  body { font-size: 14.5px; }
  .wrap { padding: 0 14px; }
  .bar-inner { min-height: 56px; gap: 8px; }
  .brand-mark { width: 34px; height: 34px; font-size: 16px; }
  .brand-text strong { font-size: 15px; }
  .brand-text em { display: none; }
  .mainnav { gap: 0; }
  .mainnav a { padding: 6px 7px; font-size: 12.5px; }
  .hero { margin-top: 14px; padding: 22px 16px 18px; border-radius: 14px; }
  .hero h1 { font-size: 25px; margin-bottom: 9px; }
  .hero-sub { font-size: 12.5px; line-height: 1.75; }
  .hero-stats { gap: 8px; margin-top: 18px; padding-top: 16px; }
  .hero-stats li { padding: 10px 9px; }
  .hero-stats strong { font-size: 20px; }
  .hero-stats strong small { font-size: 11.5px; }
  .hero-stats span { font-size: 11px; line-height: 1.4; }
  .sec { margin-top: 30px; }
  .sec-title { font-size: 18px; }
  .grid { gap: 14px; }
  .grid-cases, .grid-svc, .grid-steps { grid-template-columns: 1fr; }
  .case-title { font-size: 15.5px; }
  .foot { margin-top: 34px; padding: 24px 0 26px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}

/* ---------------- 技术笔记 ---------------- */
.note { padding: 24px 26px 10px; }
.note p { margin: 0 0 13px; font-size: 14.5px; color: #3c4a57; }
.note h3 {
  margin: 22px 0 9px;
  font-size: 15.5px;
  color: var(--navy);
}
.note h3:first-child { margin-top: 0; }
.note pre {
  margin: 0 0 15px;
  padding: 13px 15px;
  overflow-x: auto;
  background: #0e2547;
  border: 1px solid #1d477f;
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-s);
  color: #e7eef8;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
  font-size: 12.5px;
  line-height: 1.72;
  white-space: pre;
}
.note ul.dots { margin: 0 0 14px; }
.note ul.dots li { margin-bottom: 7px; }
.note-back { margin: 18px 0 0; font-size: 13.5px; color: var(--muted); }

/* 首页「技术笔记」小区块 */
.note-link { padding: 0; }
.note-link a { display: block; padding: 15px 17px; }
.note-link strong { display: block; margin-bottom: 5px; font-size: 14.5px; color: var(--navy); }
.note-link span { display: block; font-size: 12.5px; color: #55636f; }
.note-link a:hover strong { color: var(--gold); }
.note-more { margin: 14px 0 0; font-size: 13.5px; }

/* 页脚笔记入口 */
.foot-note { margin: 4px 0 0; font-size: 13px; }
.foot-note a { color: var(--gold-l); }
.foot-note a:hover { color: #fff; }

@media (max-width: 640px) {
  .note { padding: 18px 16px 6px; }
  .note pre { font-size: 11.5px; padding: 11px 12px; }
}