:root {
  color-scheme: light;
  --ink: #12151b;
  --muted: #5f6875;
  --line: #e5e8ee;
  --soft: #f5f7fa;
  --panel: #ffffff;
  --accent: #0f766e;
  --accent-dark: #0b4f4a;
  --gold: #c99945;
  --shadow: 0 22px 70px rgba(16, 24, 40, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Noto Sans SC",
    Arial,
    sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  min-height: 72px;
  padding: 14px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

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

.brand-logo {
  width: 108px;
  height: 44px;
  object-fit: contain;
  border-radius: 4px;
}

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

.brand strong {
  font-size: 17px;
  line-height: 1.1;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 3vw, 34px);
  color: #2d3440;
  font-size: 14px;
  white-space: nowrap;
}

.nav-links a {
  padding: 8px 0;
}

.header-action,
.primary-btn,
.secondary-btn,
.lead-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 700;
  white-space: nowrap;
}

.header-action,
.primary-btn,
.lead-form button {
  color: #fff;
  background: var(--accent);
}

.secondary-btn {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.12);
}

.hero {
  position: relative;
  min-height: 720px;
  display: grid;
  align-items: end;
  overflow: hidden;
  isolation: isolate;
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: saturate(0.96);
}

.hero-shade {
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(6, 15, 28, 0.86), rgba(6, 15, 28, 0.48), rgba(6, 15, 28, 0.12)),
    linear-gradient(0deg, rgba(6, 15, 28, 0.7), rgba(6, 15, 28, 0.08) 48%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(760px, calc(100% - 40px));
  margin: 0 clamp(20px, 7vw, 96px) 84px;
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(46px, 7vw, 92px);
  line-height: 1.03;
  letter-spacing: 0;
}

.hero-copy {
  width: min(680px, 100%);
  margin: 24px 0 30px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 2vw, 22px);
}

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

.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border-bottom: 1px solid var(--line);
}

.trust-strip div {
  padding: 26px clamp(20px, 4vw, 56px);
  background: #fff;
}

.trust-strip strong,
.trust-strip span {
  display: block;
}

.trust-strip strong {
  font-size: 20px;
}

.trust-strip span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

.about-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(34px, 6vw, 78px);
  align-items: center;
  background:
    linear-gradient(135deg, rgba(245, 247, 250, 0.96), rgba(255, 255, 255, 0.96)),
    radial-gradient(circle at 15% 20%, rgba(15, 118, 110, 0.16), transparent 32%),
    radial-gradient(circle at 90% 80%, rgba(201, 153, 69, 0.18), transparent 30%);
}

.about-logo-panel {
  display: grid;
  min-height: 360px;
  place-items: center;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.about-logo-panel img {
  width: min(460px, 100%);
}

.about-logo-panel p {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.22em;
}

.about-copy h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.15;
}

.about-copy p:not(.eyebrow) {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.about-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.about-highlights span {
  padding: 9px 13px;
  border: 1px solid rgba(15, 118, 110, 0.18);
  border-radius: 6px;
  color: var(--accent-dark);
  background: rgba(15, 118, 110, 0.08);
  font-size: 14px;
  font-weight: 700;
}

.section {
  padding: 92px clamp(20px, 5vw, 72px);
}

.section-heading {
  max-width: 820px;
  margin-bottom: 42px;
}

.section-heading h2,
.contact-content h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.15;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow),
.contact-content p {
  max-width: 760px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.model-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.75fr);
  gap: 22px;
}

.model-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.model-card img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  background: #e9edf2;
}

.large-card img {
  height: 430px;
}

.model-body {
  padding: 28px;
}

.model-body span {
  color: var(--accent);
  font-weight: 800;
  font-size: 13px;
}

.model-body h3 {
  margin: 8px 0 10px;
  font-size: 26px;
  line-height: 1.2;
}

.model-body p {
  margin: 0;
  color: var(--muted);
}

.muted-section {
  background: var(--soft);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.service-grid article {
  min-height: 250px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.number {
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
}

.service-grid h3 {
  margin: 28px 0 10px;
  font-size: 21px;
}

.service-grid p,
.timeline p {
  margin: 0;
  color: var(--muted);
}

.process-section {
  background: #fff;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}

.timeline div {
  position: relative;
  padding: 28px 28px 0 0;
}

.timeline div::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent);
}

.timeline strong {
  display: block;
  margin-bottom: 8px;
  font-size: 20px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 460px);
  gap: 48px;
  padding: 92px clamp(20px, 5vw, 72px);
  color: #fff;
  background:
    linear-gradient(135deg, rgba(8, 44, 42, 0.93), rgba(18, 21, 27, 0.94)),
    url("https://s1.xiaomiev.com/activity-outer-assets/0328/images/su7_20260107/home.jpg") center / cover;
}

.contact-content p {
  color: rgba(255, 255, 255, 0.82);
}

.contact-actions {
  margin-top: 28px;
}

.map-panel {
  overflow: hidden;
  margin-top: 30px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.22);
}

.map-panel iframe {
  display: block;
  width: 100%;
  height: 300px;
  border: 0;
  background: rgba(255, 255, 255, 0.12);
}

.map-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 16px;
  color: rgba(255, 255, 255, 0.82);
  background: rgba(10, 20, 28, 0.44);
  font-size: 13px;
}

.map-caption span {
  min-width: 0;
}

.map-caption a {
  flex: 0 0 auto;
  padding: 8px 12px;
  border-radius: 6px;
  color: #fff;
  background: var(--accent);
  font-weight: 700;
}

.lead-form {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(18px);
}

.lead-form label {
  display: block;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 14px;
}

.lead-form input,
.lead-form select,
.lead-form textarea {
  width: 100%;
  margin-top: 7px;
  padding: 12px 13px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  font: inherit;
}

.lead-form select option {
  color: var(--ink);
}

.lead-form textarea {
  resize: vertical;
}

.lead-form input::placeholder,
.lead-form textarea::placeholder {
  color: rgba(255, 255, 255, 0.55);
}

.lead-form button {
  width: 100%;
  border: 0;
  cursor: pointer;
}

.form-note {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.58);
  font-size: 12px;
}

.site-footer {
  display: grid;
  grid-template-columns: minmax(240px, 0.9fr) minmax(260px, 1.2fr) minmax(260px, 1.1fr);
  gap: 28px;
  padding: 34px clamp(20px, 5vw, 72px);
  color: #d7dce5;
  background: #111827;
}

.site-footer p {
  margin: 4px 0 0;
  color: #aeb7c5;
  font-size: 13px;
}

.site-footer strong {
  color: #fff;
}

.disclaimer {
  line-height: 1.7;
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero {
    min-height: 650px;
  }

  .trust-strip,
  .about-section,
  .model-grid,
  .service-grid,
  .timeline,
  .contact-section,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .large-card img,
  .model-card img {
    height: 300px;
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: auto;
    padding: 14px 16px;
  }

  .header-action {
    display: none;
  }

  .hero {
    min-height: 590px;
  }

  .hero-content {
    width: calc(100% - 32px);
    margin: 0 16px 48px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .section,
  .contact-section {
    padding: 64px 16px;
  }

  .trust-strip div {
    padding: 22px 16px;
  }

  .model-body,
  .service-grid article,
  .lead-form {
    padding: 22px;
  }

  .map-panel iframe {
    height: 240px;
  }

  .map-caption {
    align-items: flex-start;
    flex-direction: column;
  }
}