:root {
  --page: #ffffff;
  --text: #071b43;
  --body: #4f5663;
  --muted: #7b8492;
  --line: #dce3ed;
  --soft-line: #edf1f6;
  --blue: #005fd6;
  --blue-dark: #05275f;
  --blue-soft: #eef6ff;
  --shadow: 0 18px 42px rgba(4, 31, 76, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  overflow-x: hidden;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 92px;
  padding: 0 clamp(28px, 5.7vw, 88px);
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 18px;
  min-width: 0;
}

.brand-logo {
  width: 58px;
  height: 58px;
  object-fit: contain;
}

.brand-name {
  color: #071739;
  font-size: clamp(20px, 2vw, 28px);
  font-weight: 800;
  line-height: 1.2;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(42px, 6vw, 86px);
  color: #071739;
  font-size: 16px;
  font-weight: 500;
}

.site-nav a {
  padding: 10px 0;
}

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

.hero {
  position: relative;
  min-height: 432px;
  overflow: hidden;
  background:
    linear-gradient(90deg, #fff 0%, rgba(255, 255, 255, 0.96) 35%, rgba(255, 255, 255, 0.74) 48%, rgba(255, 255, 255, 0.08) 68%),
    url("../assets/images/hero-shanghai-skyline.png") right center / auto 100% no-repeat,
    linear-gradient(90deg, #fff 0%, #eef7ff 100%);
  border-bottom: 1px solid var(--soft-line);
}

.hero-copy {
  width: min(720px, 52vw);
  min-width: 0;
  padding: 88px 0 74px clamp(36px, 5.9vw, 92px);
}

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

h1 {
  margin-bottom: 8px;
  color: var(--text);
  font-size: clamp(40px, 5vw, 60px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: 0;
  overflow-wrap: anywhere;
  max-width: 100%;
}

.mobile-break {
  display: inline;
}

.hero-subtitle {
  margin-bottom: 30px;
  color: #071739;
  font-size: clamp(22px, 2.5vw, 30px);
  font-weight: 500;
  line-height: 1.38;
}

.title-line,
.card-line {
  display: block;
  width: 56px;
  height: 3px;
  background: var(--blue);
}

.hero-summary {
  max-width: 620px;
  margin: 36px 0 0;
  color: var(--body);
  font-size: 19px;
  line-height: 1.9;
}

.overview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 1360px;
  margin: 0 auto;
  padding: 38px clamp(28px, 5.9vw, 92px) 34px;
}

.overview-card {
  position: relative;
  min-height: 268px;
  padding: 4px 50px 0 0;
}

.overview-card + .overview-card {
  padding-left: 50px;
  border-left: 1px solid var(--line);
}

.card-icon {
  width: 46px;
  height: 46px;
  margin-bottom: 8px;
  color: var(--blue);
}

.card-icon svg,
.contact-list svg,
.strip-icon svg,
.mini-icon svg {
  display: block;
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.overview-card h2 {
  margin: 0 0 10px;
  color: #111a2c;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
}

.overview-card p {
  margin: 28px 0 22px;
  color: var(--body);
  font-size: 16px;
  line-height: 2;
}

.learn-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue);
  font-size: 15px;
  font-weight: 700;
}

.learn-link::after {
  content: "";
  width: 7px;
  height: 7px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
  transform: rotate(45deg);
}

.contact-list {
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  color: var(--body);
  font-size: 16px;
  list-style: none;
}

.contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.contact-list svg {
  flex: 0 0 auto;
  width: 19px;
  height: 19px;
  margin-top: 5px;
  color: #5b6472;
  stroke-width: 2;
}

.contact-list a {
  color: var(--body);
}

.contact-list a:hover,
.contact-list a:focus-visible {
  color: var(--blue);
}

.info-strip {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 0;
  max-width: 1376px;
  margin: 0 auto 38px;
  padding: 0 clamp(18px, 5vw, 76px);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.strip-heading,
.strip-item {
  display: flex;
  align-items: center;
  gap: 18px;
  min-height: 104px;
  padding: 18px 26px;
}

.strip-item {
  border-left: 1px solid var(--line);
}

.strip-icon,
.mini-icon {
  flex: 0 0 auto;
  color: var(--blue);
}

.strip-icon {
  width: 40px;
  height: 40px;
}

.mini-icon {
  width: 42px;
  height: 42px;
}

.strip-heading h2 {
  margin: 0 0 4px;
  color: #111a2c;
  font-size: 21px;
  font-weight: 700;
}

.strip-heading p,
.strip-item span {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.strip-item strong {
  display: block;
  margin-bottom: 3px;
  color: #2a3140;
  font-size: 15px;
  font-weight: 700;
}

.site-footer {
  padding: 22px clamp(28px, 5.9vw, 92px);
  color: var(--muted);
  font-size: 14px;
  text-align: center;
  border-top: 1px solid var(--soft-line);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 1024px) {
  .site-header {
    min-height: 82px;
  }

  .site-nav {
    gap: 34px;
  }

  .hero {
    min-height: 400px;
    background:
      linear-gradient(90deg, #fff 0%, rgba(255, 255, 255, 0.96) 44%, rgba(255, 255, 255, 0.42) 72%),
      url("../assets/images/hero-shanghai-skyline.png") right center / auto 100% no-repeat,
      linear-gradient(90deg, #fff 0%, #eef7ff 100%);
  }

  .hero-copy {
    width: min(640px, 64vw);
  }

  .overview {
    padding-top: 34px;
  }

  .overview-card {
    padding-right: 26px;
  }

  .overview-card + .overview-card {
    padding-left: 26px;
  }

  .info-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .strip-heading,
  .strip-item {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .strip-heading,
  .strip-item:nth-child(2) {
    border-top: 0;
  }

  .strip-item:nth-child(even) {
    border-left: 1px solid var(--line);
  }
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .brand-logo {
    width: 46px;
    height: 46px;
  }

  .brand-name {
    white-space: normal;
  }

  .site-nav {
    display: grid;
    width: calc(100vw - 56px);
    grid-template-columns: repeat(3, minmax(0, 1fr));
    justify-content: stretch;
    gap: 0;
  }

  .site-nav a {
    text-align: center;
    white-space: nowrap;
  }

  .site-nav a:first-child {
    text-align: left;
  }

  .site-nav a:last-child {
    text-align: right;
  }

  .hero {
    min-height: auto;
    background:
      linear-gradient(180deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.92) 52%, rgba(255, 255, 255, 0.34) 100%),
      url("../assets/images/hero-shanghai-skyline.png") center bottom / auto 54% no-repeat,
      #f4f9ff;
  }

  .hero-copy {
    width: calc(100vw - 56px);
    max-width: 100vw;
    min-width: 0;
    padding: 56px 28px 250px;
  }

  .hero-copy > * {
    max-width: 100%;
  }

  h1 {
    font-size: 34px;
    line-height: 1.22;
  }

  .mobile-break {
    display: block;
  }

  .hero-subtitle {
    font-size: 20px;
    line-height: 1.45;
    overflow-wrap: anywhere;
  }

  .hero-summary {
    font-size: 16px;
    overflow-wrap: anywhere;
    word-break: break-all;
  }

  .overview {
    grid-template-columns: 1fr;
    padding: 34px 28px 22px;
  }

  .overview-card {
    min-height: auto;
    padding: 0 0 30px;
  }

  .overview-card + .overview-card {
    padding-left: 0;
    padding-top: 30px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .info-strip {
    grid-template-columns: 1fr;
    margin: 0 28px 32px;
    padding: 0;
  }

  .strip-heading,
  .strip-item,
  .strip-item:nth-child(even) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .strip-heading {
    border-top: 0;
  }
}

@media (max-width: 420px) {
  .site-header {
    padding-left: 22px;
    padding-right: 22px;
  }

  .brand {
    gap: 12px;
  }

  .brand-name {
    font-size: 19px;
  }

  .site-nav {
    width: calc(100vw - 44px);
    font-size: 15px;
  }

  .hero-copy {
    width: calc(100vw - 44px);
    max-width: 100vw;
    padding-left: 22px;
    padding-right: 22px;
  }

  h1 {
    font-size: 30px;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .overview-card p,
  .contact-list,
  .strip-heading p,
  .strip-item span {
    word-break: break-all;
  }

  .overview {
    padding-left: 22px;
    padding-right: 22px;
  }

  .info-strip {
    margin-left: 22px;
    margin-right: 22px;
  }
}