:root {
  --blue: #1677ff;
  --blue-dark: #0a4fb8;
  --blue-soft: #eaf3ff;
  --orange: #ff8a1f;
  --orange-soft: #fff2e4;
  --ink: #172033;
  --text: #4f5f73;
  --muted: #8793a6;
  --line: #e6edf5;
  --paper: #f7faff;
  --white: #ffffff;
  --shadow: 0 18px 48px rgba(25, 70, 130, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.68;
  background: var(--white);
}

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

button {
  font: inherit;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 18px clamp(18px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(230, 237, 245, 0.88);
  box-shadow: 0 12px 32px rgba(23, 32, 51, 0.06);
  backdrop-filter: blur(18px);
  transition: padding 0.24s ease, box-shadow 0.24s ease;
}

.site-header.is-scrolled {
  padding-top: 12px;
  padding-bottom: 12px;
  box-shadow: 0 12px 36px rgba(23, 32, 51, 0.1);
}

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

.brand-mark {
  display: inline-grid;
  flex: 0 0 48px;
  width: 48px;
  height: 48px;
  place-items: center;
  color: var(--white);
  font-weight: 900;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  border-radius: 8px;
}

.brand strong,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand strong {
  max-width: min(410px, 42vw);
  overflow: hidden;
  font-size: 18px;
  text-overflow: ellipsis;
}

.brand small {
  margin-top: -3px;
  color: var(--muted);
  font-size: 12px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  color: #334155;
  font-size: 15px;
  font-weight: 700;
}

.site-nav a {
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--blue);
}

.nav-contact {
  min-height: 42px;
  padding: 9px 18px;
  color: var(--white) !important;
  background: var(--orange);
  border-radius: 8px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  color: var(--blue);
  background: var(--blue-soft);
  border: 1px solid #cfe3ff;
  border-radius: 8px;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
  min-height: 760px;
  padding: 132px clamp(18px, 6vw, 86px) 78px;
  background:
    radial-gradient(circle at 12% 18%, rgba(22, 119, 255, 0.12), transparent 28%),
    linear-gradient(180deg, #f7fbff 0%, #ffffff 74%);
  overflow: hidden;
}

.hero-copy {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.hero h1,
.section-title h2,
.scene-copy h2,
.about-copy h2,
.contact-card h2 {
  margin: 0;
  color: var(--ink);
  line-height: 1.14;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 720px;
  font-size: clamp(40px, 6vw, 70px);
}

.hero-copy > p:not(.eyebrow) {
  max-width: 640px;
  margin: 24px 0 0;
  color: var(--text);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 138px;
  min-height: 48px;
  padding: 12px 24px;
  font-weight: 900;
  border-radius: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.btn.primary {
  color: var(--white);
  background: var(--blue);
}

.btn.secondary {
  color: var(--orange);
  background: var(--orange-soft);
}

.hero-showcase {
  position: relative;
}

.hero-showcase::before,
.hero-showcase::after {
  position: absolute;
  z-index: 0;
  content: "";
  border-radius: 16px;
}

.hero-showcase::before {
  top: -24px;
  right: -24px;
  width: 62%;
  height: 48%;
  background: var(--orange);
  opacity: 0.12;
}

.hero-showcase::after {
  bottom: -20px;
  left: -20px;
  width: 54%;
  height: 38%;
  background: var(--blue);
  opacity: 0.12;
}

.hero-showcase img {
  position: relative;
  z-index: 1;
  height: min(58vw, 560px);
  min-height: 420px;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.hero-badge {
  position: absolute;
  right: 28px;
  bottom: 28px;
  z-index: 2;
  max-width: 330px;
  padding: 20px 22px;
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero-badge strong,
.hero-badge span {
  display: block;
}

.hero-badge strong {
  font-size: 20px;
}

.hero-badge span {
  margin-top: 6px;
  color: var(--text);
  font-size: 14px;
}

.quick-services {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(1180px, calc(100% - 36px));
  margin: -42px auto 0;
  position: relative;
  z-index: 3;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.quick-services a {
  display: grid;
  gap: 5px;
  padding: 26px 24px;
  border-right: 1px solid var(--line);
  transition: background 0.2s ease, transform 0.2s ease;
}

.quick-services a:last-child {
  border-right: 0;
}

.quick-services a:hover {
  background: var(--blue-soft);
  transform: translateY(-3px);
}

.quick-services span {
  color: var(--orange);
  font-weight: 900;
}

.quick-services strong {
  font-size: 20px;
}

.quick-services em {
  color: var(--muted);
  font-style: normal;
  font-size: 14px;
}

.section,
.process-section {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 96px 0;
}

.section-title {
  max-width: 760px;
  margin: 0 auto 42px;
  text-align: center;
}

.section-title.compact {
  margin-bottom: 30px;
}

.section-title h2,
.scene-copy h2,
.about-copy h2,
.contact-card h2 {
  font-size: clamp(30px, 4vw, 48px);
}

.section-title p:not(.eyebrow) {
  margin: 16px 0 0;
  color: var(--text);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.service-card {
  min-width: 0;
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 12px 34px rgba(25, 70, 130, 0.08);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.service-card img {
  height: 190px;
  object-fit: cover;
}

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

.service-card span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.service-card h3 {
  margin: 8px 0 10px;
  font-size: 22px;
}

.service-card p {
  margin: 0;
  color: var(--text);
  font-size: 15px;
}

.advantages {
  padding: 88px clamp(18px, 5vw, 72px);
  background: var(--paper);
}

.advantage-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
}

.advantage-list div {
  padding: 30px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 16px;
}

.advantage-list span {
  color: var(--orange);
  font-size: 24px;
  font-weight: 900;
}

.advantage-list h3 {
  margin: 18px 0 10px;
  font-size: 22px;
}

.advantage-list p {
  margin: 0;
  color: var(--text);
}

.scenes-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 52px;
  align-items: center;
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 100px 0;
}

.scene-copy p:not(.eyebrow) {
  color: var(--text);
}

.scene-copy ul {
  display: grid;
  gap: 12px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.scene-copy li {
  position: relative;
  padding-left: 28px;
  color: var(--text);
}

.scene-copy li::before {
  position: absolute;
  top: 11px;
  left: 0;
  width: 10px;
  height: 10px;
  content: "";
  background: var(--orange);
  border-radius: 50%;
}

.scene-gallery {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 18px;
  align-items: end;
}

.scene-gallery article {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.scene-gallery article:first-child {
  transform: translateY(34px);
}

.scene-gallery img {
  height: 430px;
  object-fit: cover;
}

.scene-gallery article:first-child img {
  height: 330px;
}

.scene-gallery strong {
  position: absolute;
  left: 20px;
  bottom: 18px;
  padding: 8px 14px;
  color: var(--white);
  background: rgba(22, 119, 255, 0.88);
  border-radius: 999px;
}

.process-section {
  padding-top: 78px;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.process-grid div {
  position: relative;
  padding: 28px;
  background: linear-gradient(180deg, var(--blue-soft), #ffffff);
  border: 1px solid #cfe3ff;
  border-radius: 16px;
}

.process-grid span {
  display: block;
  color: var(--blue-dark);
  font-size: 20px;
  font-weight: 900;
}

.process-grid p {
  margin: 12px 0 0;
  color: var(--text);
}

.about-section {
  display: grid;
  grid-template-columns: minmax(420px, 0.95fr) minmax(0, 1.05fr);
  gap: 52px;
  align-items: center;
  padding: 96px clamp(18px, 5vw, 72px);
  background: var(--paper);
}

.about-media img {
  height: 520px;
  object-fit: cover;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.about-copy p:not(.eyebrow) {
  color: var(--text);
}

.scope-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.scope-tags span {
  padding: 8px 14px;
  color: var(--blue-dark);
  font-weight: 700;
  background: var(--blue-soft);
  border: 1px solid #cfe3ff;
  border-radius: 999px;
}

.contact-section {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 26px;
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 96px 0;
}

.contact-card {
  padding: 34px;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  border-radius: 18px;
}

.contact-card .eyebrow,
.contact-card h2,
.contact-card p {
  color: var(--white);
}

.contact-card p {
  margin: 16px 0 0;
  opacity: 0.82;
}

.contact-info {
  padding: 34px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.contact-info dl {
  display: grid;
  gap: 16px;
  margin: 0;
}

.contact-info div {
  display: grid;
  grid-template-columns: 118px 1fr;
  gap: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.contact-info div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.contact-info dt {
  color: var(--ink);
  font-weight: 900;
}

.contact-info dd {
  margin: 0;
  color: var(--text);
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 26px;
  padding: 28px 18px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  background: #172033;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1100px) {
  .service-grid,
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero,
  .scenes-section,
  .about-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .about-section {
    padding-right: 18px;
    padding-left: 18px;
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 18px;
    display: none;
    width: min(300px, calc(100vw - 36px));
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--line);
    border-radius: 14px;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: grid;
    gap: 8px;
  }

  .site-nav a {
    padding: 10px;
  }

  .nav-contact {
    text-align: center;
  }

  .quick-services,
  .advantage-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .quick-services a:nth-child(2) {
    border-right: 0;
  }
}

@media (max-width: 620px) {
  .site-header {
    padding: 12px 18px;
  }

  .brand-mark {
    flex-basis: 42px;
    width: 42px;
    height: 42px;
    font-size: 14px;
  }

  .brand strong {
    max-width: 210px;
    font-size: 15px;
  }

  .brand small {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 112px 18px 56px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .hero-copy > p:not(.eyebrow) {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
  }

  .btn {
    width: 100%;
  }

  .hero-showcase img {
    min-height: 300px;
    height: 340px;
  }

  .hero-badge {
    right: 14px;
    bottom: 14px;
    left: 14px;
    max-width: none;
  }

  .quick-services,
  .service-grid,
  .advantage-list,
  .process-grid {
    grid-template-columns: 1fr;
  }

  .quick-services {
    width: calc(100% - 36px);
    margin-top: 24px;
  }

  .quick-services a {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .quick-services a:last-child {
    border-bottom: 0;
  }

  .section,
  .process-section,
  .scenes-section,
  .contact-section {
    width: calc(100% - 36px);
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .advantages,
  .about-section {
    padding-top: 72px;
    padding-bottom: 72px;
  }

  .scene-gallery {
    grid-template-columns: 1fr;
  }

  .scene-gallery article:first-child {
    transform: none;
  }

  .scene-gallery img,
  .scene-gallery article:first-child img,
  .about-media img {
    height: 300px;
  }

  .contact-info,
  .contact-card {
    padding: 24px;
  }

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