:root {
  --ink: #11151d;
  --muted: #5d6573;
  --paper: #f7f5ef;
  --panel: #ffffff;
  --line: rgba(17, 21, 29, 0.12);
  --night: #0b1018;
  --night-2: #131b27;
  --gold: #d8b45f;
  --cyan: #26b4b1;
  --accent: #385bff;
  --radius: 8px;
  --shadow: 0 24px 70px rgba(8, 13, 22, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  background:
    linear-gradient(90deg, rgba(17, 21, 29, 0.035) 1px, transparent 1px),
    linear-gradient(180deg, rgba(17, 21, 29, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 56px 56px;
  line-height: 1.65;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  min-height: 72px;
  margin: 18px auto 0;
  padding: 12px 14px 12px 18px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: var(--radius);
  background: rgba(11, 16, 24, 0.88);
  color: #fff;
  box-shadow: 0 12px 40px rgba(6, 10, 18, 0.16);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(216, 180, 95, 0.72);
  border-radius: 50%;
  color: var(--gold);
  font-family: Georgia, serif;
  font-size: 21px;
  line-height: 1;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
  letter-spacing: 0;
}

.brand small {
  margin-top: 1px;
  color: rgba(255, 255, 255, 0.66);
  font-size: 11px;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  padding: 10px 12px;
  border-radius: var(--radius);
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  transition: background 160ms ease, color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background: rgba(255, 255, 255, 0.09);
  color: #fff;
}

.site-nav .nav-cta {
  background: var(--gold);
  color: #15100a;
  font-weight: 700;
}

.site-nav .nav-cta:hover,
.site-nav .nav-cta:focus-visible {
  background: #efcc7a;
  color: #15100a;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: #fff;
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 44px;
  min-height: min(760px, calc(86svh - 92px));
  padding: 108px 0 56px;
  align-items: center;
}

.hero::before {
  position: absolute;
  inset: 54px -20px auto auto;
  width: 56%;
  height: 72%;
  content: "";
  background:
    linear-gradient(90deg, rgba(216, 180, 95, 0.22) 1px, transparent 1px),
    linear-gradient(180deg, rgba(38, 180, 177, 0.16) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: linear-gradient(90deg, transparent, #000 24%, #000 78%, transparent);
  opacity: 0.78;
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 26px;
  font-size: clamp(42px, 7vw, 74px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(29px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 22px;
  line-height: 1.3;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 740px;
  color: #3f4652;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border-radius: var(--radius);
  font-weight: 800;
}

.button.primary {
  background: var(--night);
  color: #fff;
}

.button.secondary {
  border: 1px solid rgba(17, 21, 29, 0.2);
  background: rgba(255, 255, 255, 0.42);
}

.hero-visual {
  position: relative;
  overflow: hidden;
  padding: 24px;
  border: 1px solid rgba(216, 180, 95, 0.28);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0)),
    var(--night);
  box-shadow: var(--shadow);
}

.hero-visual::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(216, 180, 95, 0.12) 1px, transparent 1px),
    linear-gradient(180deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.35;
  pointer-events: none;
}

.hero-visual img {
  position: relative;
  z-index: 1;
  width: min(100%, 520px);
  margin: 0 auto;
  border-radius: var(--radius);
}

.signal-board {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.signal-board span {
  display: flex;
  min-height: 42px;
  align-items: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-left: 3px solid var(--gold);
  padding: 8px 12px;
  color: rgba(255, 255, 255, 0.78);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
}

.position-band {
  background: var(--night);
  color: #fff;
}

.position-band p {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 30px 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 750;
  line-height: 1.42;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.compact {
  margin-bottom: 20px;
}

.problem,
.services,
.advantages,
.clients-deliverables,
.cases,
.tools,
.about,
.contact {
  padding: 86px 0;
}

.problem-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(360px, 1.18fr);
  gap: 42px;
  align-items: start;
}

.problem-layout > p {
  color: var(--muted);
  font-size: 18px;
}

.check-list,
.service-card ul,
.pill-list,
.deliverable-grid {
  padding: 0;
  margin: 0;
  list-style: none;
}

.check-list {
  display: grid;
  gap: 10px;
}

.check-list li {
  position: relative;
  padding: 14px 16px 14px 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.62);
}

.check-list li::before {
  position: absolute;
  left: 16px;
  top: 18px;
  width: 10px;
  height: 10px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  content: "";
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.service-card {
  min-height: 100%;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 16px 44px rgba(17, 21, 29, 0.08);
}

.service-card p {
  color: var(--muted);
}

.service-card ul {
  display: grid;
  gap: 8px;
  margin-top: 20px;
}

.service-card li {
  color: #323946;
  font-size: 14px;
}

.card-icon {
  display: inline-flex;
  min-width: 42px;
  height: 30px;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  border-radius: var(--radius);
  background: rgba(216, 180, 95, 0.16);
  color: #84611c;
  font-weight: 850;
}

.advantages {
  width: 100%;
  background: var(--night);
  color: #fff;
}

.advantages > * {
  width: min(1180px, calc(100% - 40px));
  margin-left: auto;
  margin-right: auto;
}

.advantage-list {
  display: grid;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.advantage-list div {
  display: grid;
  grid-template-columns: 80px minmax(180px, 0.36fr) minmax(0, 1fr);
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.advantage-list span {
  color: var(--gold);
  font-family: "SFMono-Regular", Consolas, monospace;
}

.advantage-list p {
  color: rgba(255, 255, 255, 0.72);
}

.clients-deliverables {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 20px;
}

.split-block {
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.pill-list li {
  padding: 9px 12px;
  border: 1px solid rgba(17, 21, 29, 0.14);
  border-radius: 999px;
  background: #fff;
  font-size: 14px;
}

.deliverable-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.deliverable-grid li {
  min-height: 48px;
  padding: 11px 12px;
  border-left: 3px solid var(--cyan);
  background: #fff;
  font-weight: 700;
}

.cases {
  width: 100%;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(255, 255, 255, 0.64)),
    var(--paper);
}

.cases > * {
  width: min(1180px, calc(100% - 40px));
  margin-left: auto;
  margin-right: auto;
}

.cases .section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.case-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 16px 44px rgba(17, 21, 29, 0.08);
}

.case-card figure {
  position: relative;
  aspect-ratio: 4 / 3;
  margin: 0;
  overflow: hidden;
  background: var(--night);
}

.case-card figure::after {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  content: "已模糊处理";
  background: linear-gradient(180deg, rgba(11, 16, 24, 0), rgba(11, 16, 24, 0.58));
  color: rgba(255, 255, 255, 0.86);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.case-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-card div {
  padding: 22px;
}

.case-card span {
  display: block;
  margin-bottom: 10px;
  color: #8b6720;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.case-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.tools {
  width: 100%;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.7), rgba(255, 255, 255, 0.5)),
    var(--paper);
}

.tools > * {
  width: min(1180px, calc(100% - 40px));
  margin-left: auto;
  margin-right: auto;
}

.tools .section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 16px 44px rgba(17, 21, 29, 0.08);
}

.tool-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.tool-tag {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(38, 180, 177, 0.14);
  color: #0f7c79;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.tool-spec {
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.tool-card p {
  flex: 1;
  color: var(--muted);
}

.tool-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-top: 22px;
}

.tool-hint {
  color: var(--muted);
  font-size: 13px;
}

.about {
  display: grid;
  grid-template-columns: minmax(320px, 0.88fr) minmax(0, 1.12fr);
  gap: 42px;
  align-items: center;
}

.about-media {
  padding: 20px;
  border-radius: var(--radius);
  background: var(--night);
  box-shadow: var(--shadow);
}

.about-media img {
  border-radius: var(--radius);
}

.about-copy p {
  color: var(--muted);
  font-size: 17px;
}

.metrics {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
}

.metrics div {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.metrics dt {
  color: #8b6720;
  font-weight: 850;
}

.metrics dd {
  margin: 0;
  color: #2e3541;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 42px;
  align-items: center;
  margin-bottom: 52px;
  padding: 48px;
  border-radius: var(--radius);
  background: var(--night-2);
  color: #fff;
}

.contact h2 {
  margin-bottom: 0;
}

.contact-panel {
  display: grid;
  gap: 12px;
}

.contact-panel a,
.contact-panel address {
  display: flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.07);
  color: #fff;
  font-weight: 800;
  overflow-wrap: anywhere;
  text-align: center;
}

.contact-panel a:first-child {
  background: var(--gold);
  color: #16110a;
}

.contact-panel address {
  min-height: 66px;
  padding: 12px 16px;
  color: rgba(255, 255, 255, 0.82);
  font-style: normal;
}

.site-footer {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin-bottom: 4px;
}

@media (max-width: 980px) {
  .hero,
  .problem-layout,
  .clients-deliverables,
  .about,
  .contact {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .service-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-grid,
  .tool-grid {
    grid-template-columns: 1fr;
  }

  .advantage-list div {
    grid-template-columns: 54px 1fr;
  }

  .advantage-list p {
    grid-column: 2;
  }

  .contact {
    padding: 34px;
  }
}

@media (max-width: 720px) {
  .site-header,
  .section,
  .position-band p,
  .advantages > *,
  .site-footer {
    width: min(100% - 28px, 1180px);
  }

  .site-header {
    min-height: 64px;
    margin-top: 10px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    display: none;
    padding: 10px;
    border-radius: var(--radius);
    background: rgba(11, 16, 24, 0.96);
    box-shadow: 0 18px 42px rgba(6, 10, 18, 0.26);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    min-height: 44px;
  }

  .brand small {
    display: none;
  }

  .hero {
    gap: 30px;
    padding: 64px 0 42px;
  }

  h1 {
    font-size: 40px;
  }

  .hero-lead,
  .problem-layout > p,
  .about-copy p {
    font-size: 16px;
  }

  .hero-actions,
  .hero-actions .button {
    width: 100%;
  }

  .service-grid,
  .deliverable-grid {
    grid-template-columns: 1fr;
  }

  .problem,
  .services,
  .advantages,
  .clients-deliverables,
  .cases,
  .tools,
  .about,
  .contact {
    padding: 58px 0;
  }

  .split-block,
  .service-card {
    padding: 22px;
  }

  .advantage-list div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .advantage-list p {
    grid-column: auto;
  }

  .metrics div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .contact {
    margin-bottom: 36px;
    padding: 28px 20px;
  }
}