/* 四川云起慕兮科技有限公司 · 静态官网 — 可直接改 CSS 变量与文案 */
:root {
  --bg: #0a0a0d;
  --bg-elevated: #0e0e12;
  --surface: #111114;
  --border: #27272a;
  --text: #f4f4f5;
  --muted: #a1a1aa;
  --dim: #71717a;
  --accent: #bfff00;
  --accent-dim: rgba(191, 255, 0, 0.12);
  --radius: 0;
  --font-sans: ui-sans-serif, system-ui, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: ui-monospace, 'JetBrains Mono', 'SFMono-Regular', Menlo, Consolas, monospace;
  --max: 72rem;
  --header-h: 3.25rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: 1rem;
}

@media (min-width: 768px) {
  .container {
    padding-inline: 1.5rem;
  }
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
}

.site-header .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: 1rem;
}

@media (min-width: 768px) {
  .site-header .inner {
    padding-inline: 1.5rem;
  }
}

.logo {
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.25;
  font-size: clamp(0.68rem, 1.65vw, 0.95rem);
  max-width: min(100%, 11.5rem);
}

@media (min-width: 960px) {
  .logo {
    white-space: nowrap;
    max-width: none;
    font-size: inherit;
  }
}

.logo span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 400;
  color: var(--dim);
}

.nav-desktop {
  display: none;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.35rem 1.25rem;
}

.nav-desktop a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  transition: color 0.15s;
}

.nav-desktop a:hover,
.nav-desktop a[aria-current='page'] {
  color: var(--accent);
}

.btn-quote {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.45rem 0.9rem;
  border: none;
  background: var(--accent);
  color: #0a0a0d;
  cursor: pointer;
  flex-shrink: 0;
}

.btn-quote:hover {
  filter: brightness(1.08);
}

.nav-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }
  .nav-desktop {
    display: flex;
  }
}

.nav-mobile {
  display: none;
  overflow-x: auto;
  gap: 0.75rem;
  padding: 0.5rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.nav-mobile a {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  white-space: nowrap;
  color: var(--muted);
}

.nav-mobile a[aria-current='page'] {
  color: var(--accent);
}

@media (min-width: 900px) {
  .nav-mobile {
    display: none !important;
  }
}

body.nav-open .nav-mobile {
  display: flex;
}

/* —— Page hero —— */
.page-hero {
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.page-hero h1 {
  margin: 0;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-hero .sub {
  margin: 0.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--dim);
}

/* —— Sections —— */
.section {
  padding: 3rem 0;
}

.section-alt {
  background: var(--bg-elevated);
  border-block: 1px solid var(--border);
}

.section h2 {
  margin: 0 0 0.5rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.section .lead {
  margin: 0 0 2rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--dim);
}

/* —— Cards —— */
.grid-cards {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-cards.cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  display: block;
  padding: 1.5rem;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: border-color 0.15s;
}

a.card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
}

.card h3 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.card p {
  margin: 0.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--dim);
  line-height: 1.5;
}

.card .tag {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--accent);
}

/* —— Placeholder —— */
.placeholder-img {
  aspect-ratio: 16 / 9;
  background: linear-gradient(145deg, #1c1c22 0%, #12121a 100%);
  border: 1px solid var(--border);
}

.placeholder-avatar {
  width: 100%;
  max-width: 12rem;
  aspect-ratio: 1;
  background: linear-gradient(145deg, #1c1c22, #0e0e12);
  border: 1px solid var(--border);
}

.placeholder-qr {
  width: 100px;
  height: 100px;
  background: #18181c;
  border: 1px solid var(--border);
}

/* —— Buttons —— */
.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0.65rem 1.25rem;
  border: none;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  background: var(--accent);
  color: #0a0a0d;
}

.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn-secondary:hover {
  border-color: var(--muted);
}

/* —— Banner / hero home —— */
.hero {
  padding: 3rem 0 3.5rem;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (min-width: 900px) {
  .hero-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.hero-visual {
  width: 100%;
  max-width: 28rem;
  min-height: 12rem;
  flex-shrink: 0;
}

.hero .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.06em;
}

.hero h1 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero .desc {
  margin: 1rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--muted);
  max-width: 36rem;
}

/* —— Lists / quotes —— */
.list-check {
  margin: 0;
  padding: 0;
  list-style: none;
}

.list-check li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--muted);
}

.list-check li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--accent);
}

.quote-block {
  margin: 0;
  padding: 1.25rem;
  border: 1px solid var(--border);
  background: var(--surface);
}

.quote-block p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.quote-block footer {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
}

/* —— Process —— */
.process-line {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent);
  letter-spacing: 0.02em;
}

/* —— Footer —— */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg);
  padding: 2.5rem 0 2rem;
}

.site-footer .grid {
  display: grid;
  gap: 2rem;
}

@media (min-width: 768px) {
  .site-footer .grid {
    grid-template-columns: 1fr auto;
  }
}

.site-footer p {
  margin: 0.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--dim);
  max-width: 22rem;
}

.site-footer .links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.875rem;
}

.site-footer .links a {
  color: var(--muted);
}

.site-footer .links a:hover {
  color: var(--accent);
}

.copyright {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--dim);
}

/* —— Forms —— */
.form-wrap {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 1.5rem;
}

.form-wrap label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--dim);
}

.form-wrap input,
.form-wrap textarea {
  width: 100%;
  margin-top: 0.35rem;
  margin-bottom: 0.75rem;
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--border);
  background: #1a1a1e;
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
}

.form-wrap input:focus,
.form-wrap textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.form-note {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--dim);
}

.form-note.ok {
  color: var(--accent);
}

/* —— Article / case —— */
.prose {
  max-width: 42rem;
}

.prose h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.1rem;
}

.prose p,
.prose li {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
}

.prose ul {
  padding-left: 1.2rem;
}

/* —— Services page —— */
.services-intro {
  max-width: 48rem;
  padding: 1.5rem 1.25rem;
  border: 1px solid var(--border);
  background: var(--surface);
  border-left: 3px solid var(--accent);
}

.services-intro-title {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.services-intro p {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--muted);
  line-height: 1.75;
}

.services-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.services-toc a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--dim);
  transition: color 0.15s;
}

.services-toc a:hover {
  color: var(--accent);
}

.service-block {
  max-width: 48rem;
  padding: 1.75rem 1.5rem 1.5rem;
  border: 1px solid var(--border);
  background: var(--surface);
}

.service-kicker {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.service-block > h2 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.service-lead {
  margin: 0 0 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
}

.service-grid {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 640px) {
  .service-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.service-col-title {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text);
}

.service-col ul {
  margin: 0;
  padding-left: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
  line-height: 1.65;
}

.service-col li {
  margin-bottom: 0.35rem;
}

.service-meta {
  display: grid;
  gap: 0.5rem 1.5rem;
  margin: 0 0 1.25rem;
  padding: 1rem 0 0;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

@media (min-width: 560px) {
  .service-meta {
    grid-template-columns: auto 1fr;
  }
}

.service-meta dt {
  margin: 0;
  color: var(--dim);
  font-weight: 500;
}

.service-meta dd {
  margin: 0;
  color: var(--muted);
}

.service-block .btn-row {
  margin-top: 0.75rem;
}

/* —— Modal —— */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.65);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.modal-backdrop.open {
  display: flex;
}

.modal {
  width: 100%;
  max-width: 24rem;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 1.5rem;
  position: relative;
}

.modal h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.modal-company {
  margin-top: 0.75rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.modal-company-name {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}

.modal-company-line {
  margin: 0.35rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
}

.modal-company-line a {
  color: var(--accent);
}

.modal-company-line a:hover {
  text-decoration: underline;
}

.modal .close {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  border: none;
  background: none;
  color: var(--dim);
  cursor: pointer;
  font-size: 1.25rem;
  line-height: 1;
}

/* —— Blog list —— */
.blog-item {
  display: block;
  padding: 1.25rem;
  border: 1px solid var(--border);
  background: var(--surface);
  margin-bottom: 0.75rem;
  transition: border-color 0.15s;
}

.blog-item:hover {
  border-color: color-mix(in srgb, var(--accent) 35%, var(--border));
}

.blog-item h3 {
  margin: 0;
  font-size: 1rem;
}

.blog-item .excerpt {
  margin: 0.5rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--dim);
}

.blog-item .date {
  margin-top: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--dim);
}

/* —— Utility —— */
.mt-0 {
  margin-top: 0;
}
.text-center {
  text-align: center;
}

@media (min-width: 768px) {
  .grid-contact {
    grid-template-columns: 1fr 1.2fr;
    align-items: start;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

/* —— Tech page: team specs & stack tags —— */
.tech-team-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 640px) {
  .tech-team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 960px) {
  .tech-team-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.tech-spec-card {
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 1rem 1.25rem;
}

.tech-spec-card h3 {
  margin: 0 0 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.tech-spec-card dl {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--muted);
}

.tech-spec-card dt {
  color: var(--dim);
  margin-top: 0.5rem;
}

.tech-spec-card dt:first-of-type {
  margin-top: 0;
}

.tech-spec-card dd {
  margin: 0.15rem 0 0;
  color: var(--text);
}

.tag-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.tag-stack span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.35rem 0.6rem;
  border: 1px solid var(--border);
  color: var(--muted);
  background: var(--bg);
}

/* —— Case cards & detail screenshots —— */
.case-thumb-wrap {
  width: 100%;
  aspect-ratio: 9 / 16;
  max-height: 17rem;
  overflow: hidden;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.case-thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}

a.card .case-thumb-wrap {
  margin: -1.5rem -1.5rem 0;
  width: calc(100% + 3rem);
}

a.card h3 {
  margin-top: 1rem;
}

.case-hero-shot {
  width: 100%;
  max-width: 22rem;
  margin: 0 auto 1.5rem;
  display: block;
  border: 1px solid var(--border);
}

.case-hero-shot img {
  width: 100%;
  vertical-align: middle;
  display: block;
}

.case-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  gap: 0.75rem;
  margin-top: 1.5rem;
  max-width: 48rem;
}

.case-gallery img {
  width: 100%;
  height: auto;
  display: block;
  border: 1px solid var(--border);
  background: var(--bg);
}

.case-section-title {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
}

.case-section-lead {
  margin: 0 0 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--dim);
}

.case-section + .case-section {
  margin-top: 3rem;
}

@media (min-width: 768px) {
  .case-section + .case-section {
    margin-top: 3.5rem;
  }
}