/* ==========================================================================
   沈阳诺程科技有限公司 · 企业官网
   视觉语言：公文纸 / 档案。浅纸底、宋体标题、细线分隔、藏青与铜金。
   与产品站（深色紫调）完全分开，避免看起来像同一个模板换配色。
   无构建步骤、无外部字体、无第三方脚本。
   ========================================================================== */

:root {
  --paper: #f7f4ee;
  --paper-2: #fffdf8;
  --ink: #15181d;
  --ink-2: #333941;
  --muted: #6a7078;
  --navy: #123049;
  --navy-2: #0c2334;
  --brass: #98793f;
  --brass-lt: #c9a877;
  --rule: #ddd7c9;
  --rule-2: #e9e4d8;

  --wrap: 1180px;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);

  --font-serif: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "SimSun", "STSong", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", "IBM Plex Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, p, dl, dd, figure { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; }
b, strong { font-weight: 700; }

::selection { background: rgba(152, 121, 63, 0.22); }

:focus-visible {
  outline: 2px solid var(--navy);
  outline-offset: 3px;
}

.nw { white-space: nowrap; }

.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.wrap {
  width: calc(100% - 56px);
  max-width: var(--wrap);
  margin-inline: auto;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
}
.skip:focus { left: 12px; top: 12px; }

/* ---------- 顶部 ---------- */

.site-head {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(247, 244, 238, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--rule);
}

.head-inner {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 28px;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex: 0 0 auto;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--ink);
  outline: 1px solid var(--rule);
  outline-offset: 3px;
  background: var(--paper-2);
  font-family: var(--font-serif);
  font-size: 20px;
  line-height: 1;
  color: var(--ink);
}

.brand-text b {
  display: block;
  font-size: 16px;
  letter-spacing: 0.14em;
  color: var(--ink);
}

.brand-text i {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 8.4px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
}

.nav a {
  position: relative;
  font-size: 13.4px;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  text-decoration: none;
  padding: 6px 0;
  white-space: nowrap;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 0;
  height: 1px;
  background: var(--brass);
  transition: width 0.24s var(--ease);
}
.nav a:hover::after { width: 100%; }
.nav a:hover { color: var(--ink); }

.nav-out {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: 0 0 auto;
  padding: 8px 13px;
  font-size: 13.2px;
  letter-spacing: 0.05em;
  white-space: nowrap;
  text-decoration: none;
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--navy);
  font-weight: 600;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.nav-out:hover {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--paper);
}
.nav-out svg { width: 11px; height: 11px; fill: none; stroke: currentColor; stroke-width: 1.5; }

/* ---------- 首屏 ---------- */

.hero { padding: 72px 0 0; }

.hero-grid {
  display: grid;
  grid-template-columns: 1.16fr 0.84fr;
  gap: 58px;
  align-items: center;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 13px;
  font-size: 11.4px;
  letter-spacing: 0.14em;
  color: var(--brass);
}

.rule-mark {
  display: inline-block;
  width: 30px;
  height: 1px;
  background: var(--brass);
  flex: 0 0 auto;
}

.hero h1 {
  margin-top: 24px;
  font-family: var(--font-serif);
  font-size: clamp(2.2rem, 4.1vw, 3.5rem);
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: 0.015em;
  overflow-wrap: anywhere;
  text-wrap: balance;
}

.hero h1 em {
  position: relative;
  font-style: normal;
  color: var(--navy);
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: linear-gradient(90deg, var(--brass) 0%, rgba(152, 121, 63, 0.05) 100%);
}

.hero-lead {
  margin-top: 30px;
  max-width: 32em;
  font-size: 15.2px;
  line-height: 2;
  color: var(--ink-2);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 2px;
  background: var(--navy);
  color: #fff;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}
.btn:hover { background: var(--navy-2); transform: translateY(-1px); }
.btn svg { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 1.5; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  padding: 12px 22px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  color: var(--ink-2);
  font-size: 13px;
  letter-spacing: 0.06em;
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.btn-ghost:hover { border-color: var(--ink-2); color: var(--ink); }

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 46px;
  border-top: 1px solid var(--rule);
}

.hero-facts li { padding: 18px 18px 0 0; }
.hero-facts li + li {
  padding-left: 22px;
  border-left: 1px solid var(--rule-2);
}

.hero-facts b {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.hero-facts span {
  display: block;
  margin-top: 8px;
  font-size: 13.6px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.6;
}

/* 首屏配图：档案照片式相框 */

.hero-figure {
  padding: 10px 10px 0;
  border: 1px solid var(--rule);
  background: var(--paper-2);
  box-shadow: 0 26px 60px -46px rgba(18, 48, 73, 0.7);
}

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1.03;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.02);
}

.hero-figure figcaption {
  padding: 11px 2px 12px;
  font-size: 9.2px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

/* ---------- 通用区块 ---------- */

.section { padding: 92px 0; }
.section + .section { border-top: 1px solid var(--rule); }
.section-plain { background: var(--paper-2); }

.sec-head { max-width: 660px; margin-bottom: 52px; }

.sec-no {
  font-size: 10px;
  letter-spacing: 0.22em;
  color: var(--brass);
  margin-bottom: 16px;
}

.sec-head h2,
.contact-main h2 {
  font-family: var(--font-serif);
  font-size: clamp(1.65rem, 2.6vw, 2.1rem);
  font-weight: 700;
  letter-spacing: 0.03em;
  line-height: 1.45;
}

.sec-lead {
  margin-top: 18px;
  max-width: 42em;
  font-size: 14.4px;
  line-height: 1.95;
  color: var(--muted);
}

/* ---------- 能做什么 ---------- */

.biz-list { border-top: 1px solid var(--ink); }

.biz-list li {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 28px;
  align-items: start;
  padding: 26px 0 27px;
  border-bottom: 1px solid var(--rule);
  transition: background 0.2s var(--ease);
}
.biz-list li:hover { background: rgba(152, 121, 63, 0.045); }

.biz-no {
  padding-top: 6px;
  font-size: 11.2px;
  letter-spacing: 0.12em;
  color: var(--brass);
}

.biz-body h3 {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.biz-body p {
  margin-top: 9px;
  max-width: 52em;
  font-size: 13.9px;
  line-height: 1.9;
  color: var(--muted);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 14px;
}

.tags li {
  padding: 3px 9px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 9.8px;
  letter-spacing: 0.08em;
  white-space: nowrap;
  color: var(--muted);
  background: rgba(255, 253, 248, 0.6);
}

/* ---------- 做过什么（图带） ---------- */

.shots {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.shot { border: 1px solid var(--rule); background: var(--paper); }

.shot-img {
  overflow: hidden;
  background: var(--rule-2);
}
.shot-img img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.94) contrast(1.02);
  transition: transform 0.7s var(--ease);
}
.shot:hover .shot-img img { transform: scale(1.035); }

.shot figcaption { padding: 18px 20px 22px; }

.shot h3 {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.shot p {
  margin-top: 9px;
  font-size: 13.2px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 产品 ---------- */

.prod {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 56px;
  padding: 42px 44px;
  border: 1px solid var(--rule);
  background: var(--paper-2);
}

.prod-kicker {
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--brass);
}

.prod-id h3 {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.prod-id h3 span {
  font-family: var(--font-mono);
  font-size: 11.2px;
  font-weight: 400;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.prod-line {
  margin-top: 18px;
  max-width: 30em;
  font-size: 14.4px;
  line-height: 1.95;
  color: var(--ink-2);
}

.prod .btn { margin-top: 28px; }

.prod-spec {
  align-self: start;
  border-top: 1px solid var(--ink);
}

.prod-spec > div {
  display: grid;
  grid-template-columns: 66px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.prod-spec dt {
  padding-top: 2px;
  font-size: 11.2px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.prod-spec dd {
  font-size: 13.2px;
  line-height: 1.75;
  color: var(--ink);
}

.prod-next {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 18px;
  padding: 20px 26px;
  border: 1px dashed var(--rule);
}

.prod-next .mono {
  flex: 0 0 auto;
  padding: 5px 10px;
  border: 1px solid var(--rule);
  font-size: 9.6px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.prod-next p {
  font-size: 13.2px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 怎么合作 ---------- */

.coop-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}

.coop {
  padding: 30px 28px 34px;
  background: var(--paper-2);
}

.coop-no {
  display: inline-block;
  font-size: 10.4px;
  letter-spacing: 0.16em;
  color: var(--brass);
}

.coop h3 {
  margin-top: 16px;
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.coop p {
  margin-top: 12px;
  font-size: 13.4px;
  line-height: 1.95;
  color: var(--muted);
}

.coop-shot {
  margin-top: 22px;
  border: 1px solid var(--rule);
  overflow: hidden;
}
.coop-shot img {
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 5;
  object-fit: cover;
  object-position: center 38%;
  filter: saturate(0.92) contrast(1.02);
}

/* ---------- 常见问题 ---------- */

.faq { border-top: 1px solid var(--ink); }

.faq > div {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 34px;
  align-items: baseline;
  padding: 24px 0;
  border-bottom: 1px solid var(--rule);
}

.faq dt {
  font-family: var(--font-serif);
  font-size: 15.6px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.faq dd {
  max-width: 46em;
  font-size: 13.8px;
  line-height: 1.95;
  color: var(--muted);
}

/* ---------- 联系 ---------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 64px;
  align-items: start;
}

.contact-main h2 { margin-top: 14px; }

.contact-list {
  margin-top: 36px;
  border-top: 1px solid var(--rule);
}

.contact-list > div {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 18px;
  align-items: baseline;
  padding: 15px 0;
  border-bottom: 1px solid var(--rule-2);
}

.contact-list dt {
  font-size: 11.4px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.contact-list dd {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink);
}
.contact-list dd.code { font-weight: 600; color: var(--navy); }

.text-link {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid rgba(18, 48, 73, 0.32);
  padding-bottom: 1px;
  transition: border-color 0.2s var(--ease);
}
.text-link:hover { border-color: var(--navy); }

.contact-note {
  margin-top: 28px;
  max-width: 34em;
  padding-left: 16px;
  border-left: 2px solid var(--brass);
  font-size: 12.6px;
  line-height: 1.95;
  color: var(--muted);
}

.qr {
  justify-self: end;
  padding: 20px 20px 15px;
  border: 1px solid var(--rule);
  background: #fff;
  text-align: center;
}
.qr img { width: 240px; max-width: 100%; height: auto; }
.qr figcaption {
  margin-top: 13px;
  font-size: 9.6px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

/* ---------- 页脚 ---------- */

.site-foot {
  background: var(--navy-2);
  color: rgba(238, 234, 225, 0.66);
  padding: 46px 0 28px;
}

.foot-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}

.foot-id b {
  display: block;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.1em;
  color: #f7f4ee;
}

.foot-id span {
  display: block;
  margin-top: 9px;
  font-size: 10.2px;
  letter-spacing: 0.08em;
  color: rgba(238, 234, 225, 0.42);
}

.foot-nav { display: flex; flex-wrap: wrap; gap: 22px; }
.foot-nav a {
  font-size: 12.4px;
  color: rgba(238, 234, 225, 0.58);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.foot-nav a:hover { color: #f7f4ee; }

.foot-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 30px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 11.4px;
  color: rgba(238, 234, 225, 0.4);
}

/* ---------- 响应式 ---------- */

@media (max-width: 1040px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-figure { max-width: 520px; }
  .hero-figure img { aspect-ratio: 4 / 3; }
  .shots { grid-template-columns: 1fr 1fr; }
  .prod { grid-template-columns: 1fr; gap: 34px; padding: 34px 30px; }
  .contact-grid { grid-template-columns: 1fr; gap: 44px; }
  .qr { justify-self: start; }
  .coop-grid { grid-template-columns: 1fr; }
  .faq > div { grid-template-columns: 1fr; gap: 10px; }
  .faq dt { padding-top: 4px; }
}

@media (max-width: 900px) {
  .head-inner { flex-wrap: wrap; padding: 12px 0 10px; gap: 10px; }
  .nav {
    order: 3;
    width: 100%;
    margin-left: 0;
    gap: 20px;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
  }
  .nav::-webkit-scrollbar { display: none; }
  .nav-out { order: 2; margin-left: auto; }

  .biz-list li { grid-template-columns: 40px 1fr; gap: 16px; }
}

@media (max-width: 620px) {
  .wrap { width: calc(100% - 36px); }
  .nav {
    flex-wrap: wrap;
    overflow: visible;
    gap: 9px 15px;
    padding-bottom: 0;
  }
  .nav a { font-size: 12.6px; }
  .hero { padding-top: 48px; }
  .hero h1 { font-size: clamp(1.72rem, 7.6vw, 2.1rem); }
  .hero-lead { margin-top: 22px; font-size: 14.2px; line-height: 1.9; }
  .hero-cta { margin-top: 26px; }
  .hero-cta .btn, .hero-cta .btn-ghost { flex: 1 1 auto; justify-content: center; }
  .hero-facts { grid-template-columns: 1fr; margin-top: 32px; }
  .hero-facts li { padding: 13px 0 0; }
  .hero-facts li + li {
    padding-left: 0;
    margin-top: 13px;
    border-left: 0;
    border-top: 1px solid var(--rule-2);
  }
  .hero-figure { padding: 8px 8px 0; }
  .section { padding: 58px 0; }
  .sec-head { margin-bottom: 34px; }
  .biz-list li { padding: 22px 0; }
  .shots { grid-template-columns: 1fr; }
  .prod { padding: 26px 22px; }
  .prod-id h3 { font-size: 25px; }
  .prod-next { flex-direction: column; align-items: flex-start; gap: 14px; padding: 18px 20px; }
  .coop { padding: 24px 20px 26px; }
  .coop-shot img { aspect-ratio: 16 / 9; }
  .contact-list > div { grid-template-columns: 1fr; gap: 5px; }
  .foot-inner { flex-direction: column; gap: 22px; }
  .foot-bottom { flex-direction: column; gap: 8px; }
  .qr { padding: 16px 16px 13px; }
  .qr img { width: 200px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
  .btn:hover { transform: none; }
  .shot:hover .shot-img img { transform: none; }
}