:root {
  --bg: #f4f7fb;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-strong: #ffffff;
  --panel-dark: #081321;
  --text: #102033;
  --muted: #5e7087;
  --line: rgba(16, 32, 51, 0.12);
  --line-strong: rgba(16, 32, 51, 0.2);
  --primary: #1f7cff;
  --primary-dark: #1458db;
  --secondary: #17b8d4;
  --accent: #0f2340;
  --shadow: 0 18px 50px rgba(7, 20, 35, 0.1);
  --shadow-soft: 0 10px 30px rgba(7, 20, 35, 0.08);
  --radius: 20px;
  --radius-lg: 28px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top left, rgba(31, 124, 255, 0.08), transparent 26%),
    radial-gradient(circle at top right, rgba(23, 184, 212, 0.08), transparent 24%),
    var(--bg);
  color: var(--text);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.6;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.container {
  width: min(1200px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(18px);
  background: rgba(7, 17, 30, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header__inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

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

.brand__mark {
  width: 72px;
  height: 72px;
  object-fit: contain;
  flex: 0 0 auto;
}

.brand__text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand--icon-only .brand__text {
  display: none;
}

.brand--icon-only .brand__mark {
  width: 187px;
}

.brand__name {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.1;
}

.brand__tagline {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.66);
}

.nav {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav__link {
  color: rgba(255, 255, 255, 0.75);
  padding: 8px 12px;
  border-radius: 999px;
  transition: 0.2s ease;
}

.nav__link:hover,
.nav__link.is-active {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.nav__cta {
  margin-left: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 15px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-weight: 700;
  box-shadow: 0 10px 24px rgba(31, 124, 255, 0.28);
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
  align-items: center;
  justify-content: center;
  padding: 0;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 999px;
  position: relative;
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 999px;
}

.menu-toggle span::before {
  top: -6px;
}

.menu-toggle span::after {
  top: 6px;
}

.mobile-nav {
  display: none;
  padding: 0 16px 18px;
}

.mobile-nav.is-open {
  display: block;
}

.mobile-nav__panel {
  padding: 12px;
  border-radius: 22px;
  background: rgba(9, 18, 33, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow);
}

.mobile-nav__link {
  display: block;
  padding: 14px 12px;
  border-radius: 14px;
  color: rgba(255, 255, 255, 0.82);
}

.mobile-nav__link:hover,
.mobile-nav__link.is-active {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

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

.hero__overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 17, 30, 0.86), rgba(7, 17, 30, 0.52) 58%, rgba(7, 17, 30, 0.24)),
    linear-gradient(180deg, rgba(7, 17, 30, 0.2), rgba(7, 17, 30, 0.66));
}

.hero__inner {
  position: relative;
  z-index: 1;
  min-height: 640px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 40px;
  padding: 84px 0 80px;
}

.hero__content {
  max-width: 680px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.84rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero__title {
  margin: 18px 0 16px;
  font-size: clamp(2.6rem, 5vw, 4.9rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

.hero__title strong {
  display: block;
  color: #c8efff;
}

.hero__subtitle {
  max-width: 620px;
  margin: 0;
  font-size: 1.08rem;
  color: rgba(255, 255, 255, 0.82);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  transition: 0.2s ease;
  cursor: pointer;
}

.btn--primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-weight: 700;
  box-shadow: 0 18px 32px rgba(31, 124, 255, 0.22);
}

.btn--ghost {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.btn--dark {
  background: #0b1a2b;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.04);
}

.hero__panel {
  display: grid;
  gap: 18px;
  justify-items: end;
}

.hero__glass {
  width: min(100%, 420px);
  padding: 22px;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(18px);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.18);
}

.hero__glass h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
}

.hero__glass p {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.96rem;
}

.hero__mosaic {
  width: min(100%, 420px);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.mini-card {
  padding: 16px;
  min-height: 128px;
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(10px);
}

.mini-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.35rem;
}

.mini-card span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.92rem;
}

.section {
  padding: 88px 0;
}

.section--soft {
  background: rgba(255, 255, 255, 0.58);
  border-top: 1px solid rgba(16, 32, 51, 0.05);
  border-bottom: 1px solid rgba(16, 32, 51, 0.05);
}

.section--dark {
  background: #081321;
  color: #fff;
}

.section__head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 34px;
}

.section__head--center {
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.section__kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border-radius: 999px;
  background: rgba(31, 124, 255, 0.08);
  color: var(--primary-dark);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.section--dark .section__kicker {
  background: rgba(255, 255, 255, 0.08);
  color: #8bd9ff;
}

.section__title {
  margin: 12px 0 0;
  font-size: clamp(1.9rem, 3vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.section__lead {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--muted);
}

.section--dark .section__lead {
  color: rgba(255, 255, 255, 0.74);
}

.grid {
  display: grid;
  gap: 22px;
}

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

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.card--dark {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.card__media {
  position: relative;
  overflow: hidden;
  min-height: 240px;
}

.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.45s ease;
}

.card:hover .card__media img {
  transform: scale(1.04);
}

.card__badge {
  position: absolute;
  left: 18px;
  top: 18px;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(7, 17, 30, 0.56);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 700;
  backdrop-filter: blur(10px);
}

.card__body {
  padding: 22px;
}

.card__title {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1.35;
}

.card__text {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.tag-list,
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag,
.chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
}

.tag {
  background: rgba(31, 124, 255, 0.08);
  color: var(--primary-dark);
}

.chip {
  background: #eff5fb;
  color: #36506d;
  border: 1px solid transparent;
  cursor: pointer;
}

.chip.is-active {
  background: #0b1a2b;
  color: #fff;
}

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  align-items: center;
}

.split__media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

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

.split__copy {
  padding: 10px 0;
}

.content-panel {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, #ffffff 0%, #f3f7ff 100%);
  border: 1px solid rgba(95, 125, 180, 0.14);
  box-shadow: var(--shadow-soft);
}

.content-panel__head {
  margin-bottom: 22px;
}

.content-panel__head .section__title {
  margin-bottom: 10px;
}

.page-content {
  font-size: 15px;
  line-height: 1.85;
  color: #23344f;
}

.page-content > :first-child {
  margin-top: 0;
}

.page-content > :last-child {
  margin-bottom: 0;
}

.page-content h2,
.page-content h3,
.page-content h4 {
  margin: 20px 0 10px;
  line-height: 1.35;
  color: #173262;
}

.page-content p {
  margin: 0 0 14px;
}

.page-content ul,
.page-content ol {
  margin: 0 0 14px 20px;
  padding: 0;
}

.page-content a {
  color: var(--primary);
}

.list {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.list li {
  display: flex;
  gap: 12px;
  color: var(--muted);
}

.list li::before {
  content: "•";
  color: var(--primary);
  font-weight: 700;
}

.metric-strip {
  margin-top: -58px;
  position: relative;
  z-index: 2;
}

.metric-strip__panel {
  padding: 22px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.metric {
  padding: 10px 6px;
  text-align: center;
}

.metric strong {
  display: block;
  font-size: clamp(1.5rem, 2vw, 2rem);
  color: #0b1a2b;
}

.metric span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.92rem;
}

.timeline {
  position: relative;
  display: grid;
  gap: 18px;
  padding-left: 26px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: rgba(31, 124, 255, 0.18);
}

.timeline__item {
  position: relative;
  padding: 18px 18px 18px 24px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.75);
  border: 1px solid rgba(16, 32, 51, 0.08);
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 26px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  box-shadow: 0 0 0 4px rgba(31, 124, 255, 0.12);
}

.timeline__year {
  color: var(--primary-dark);
  font-size: 0.9rem;
  font-weight: 800;
}

.timeline__title {
  margin: 6px 0 0;
  font-size: 1rem;
}

.timeline__text {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.testimonial {
  display: grid;
  gap: 16px;
  padding: 22px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.testimonial__meta {
  display: flex;
  align-items: center;
  gap: 14px;
}

.avatar {
  width: 54px;
  height: 54px;
  border-radius: 18px;
  overflow: hidden;
  flex: 0 0 auto;
  border: 1px solid rgba(16, 32, 51, 0.08);
}

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

.testimonial__name {
  font-weight: 800;
}

.testimonial__role {
  color: var(--muted);
  font-size: 0.9rem;
}

.quote {
  margin: 0;
  color: #30445b;
}

.banner {
  position: relative;
  border-radius: 30px;
  overflow: hidden;
  min-height: 260px;
  box-shadow: var(--shadow);
}

.banner__media {
  position: absolute;
  inset: 0;
}

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

.banner__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(7, 17, 30, 0.82), rgba(7, 17, 30, 0.42));
}

.banner__content {
  position: relative;
  z-index: 1;
  padding: 34px;
  color: #fff;
  max-width: 650px;
}

.banner__content .section__title,
.banner__content .section__lead {
  color: #fff;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 24px;
}

.article-card .card__media {
  min-height: 200px;
}

.article-card .card__body {
  display: grid;
  gap: 12px;
}

.article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  color: var(--muted);
  font-size: 0.85rem;
}

.article__meta strong {
  color: var(--primary-dark);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 24px;
}

.contact-panel {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.contact-panel__media {
  min-height: 100%;
  position: relative;
}

.contact-panel__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.contact-panel__caption {
  position: absolute;
  inset: auto 22px 22px 22px;
  padding: 18px 20px;
  border-radius: 20px;
  background: rgba(7, 17, 30, 0.68);
  color: #fff;
  backdrop-filter: blur(14px);
}

.contact-panel__caption strong {
  display: block;
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.contact-form {
  padding: 26px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
}

.field-grid {
  display: grid;
  gap: 16px;
}

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

.field label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #31475e;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  border: 1px solid rgba(16, 32, 51, 0.12);
  background: #fff;
  color: var(--text);
  border-radius: 14px;
  padding: 14px 14px;
  outline: none;
  transition: 0.2s ease;
}

.field textarea {
  min-height: 150px;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: rgba(31, 124, 255, 0.45);
  box-shadow: 0 0 0 4px rgba(31, 124, 255, 0.08);
}

.faq {
  display: grid;
  gap: 14px;
}

.faq__item {
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.84);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-soft);
  overflow: hidden;
}

.faq__question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 20px;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.faq__question span {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text);
}

.faq__icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background: var(--muted);
  border-radius: 999px;
}

.faq__icon::before {
  width: 18px;
  height: 2px;
}

.faq__icon::after {
  width: 2px;
  height: 18px;
  transition: transform 0.2s ease;
}

.faq__item.is-open .faq__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease;
}

.faq__item.is-open .faq__answer {
  max-height: 220px;
}

.faq__answer p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
}

.site-footer {
  padding: 54px 0 26px;
  background: #07111e;
  color: rgba(255, 255, 255, 0.74);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 24px;
}

.site-footer__brand {
  display: grid;
  gap: 14px;
}

.site-footer__brand .brand__name {
  font-size: 1.18rem;
}

.site-footer__title {
  margin: 0 0 12px;
  color: #fff;
  font-size: 1rem;
}

.site-footer__links {
  display: grid;
  gap: 10px;
}

.site-footer__links a {
  color: rgba(255, 255, 255, 0.72);
}

.site-footer__bottom {
  margin-top: 34px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.92rem;
}

.site-footer__icp a {
  color: #8bd9ff;
}

.muted {
  color: var(--muted);
}

@media (max-width: 1100px) {
  .hero__inner,
  .split,
  .contact-grid,
  .site-footer__grid {
    grid-template-columns: 1fr;
  }

  .hero__panel {
    justify-items: start;
  }

  .grid--4,
  .grid--3,
  .metric-strip__panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .site-header__inner {
    min-height: 60px;
  }

  .nav,
  .nav__cta {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .hero__inner {
    min-height: 0;
    padding: 62px 0 64px;
  }

  .hero__title {
    font-size: clamp(2.2rem, 8vw, 3.8rem);
  }

  .hero__subtitle {
    font-size: 1rem;
  }

  .section {
    padding: 68px 0;
  }

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

  .grid--2,
  .grid--3,
  .grid--4,
  .field-grid--2,
  .metric-strip__panel {
    grid-template-columns: 1fr;
  }

  .metric-strip {
    margin-top: 0;
    padding-top: 22px;
  }

  .banner__content {
    padding: 26px 22px;
  }
}

@media (max-width: 560px) {
  .container {
    width: min(100% - 24px, 1200px);
  }

  .brand__tagline {
    display: none;
  }

  .brand__mark {
    width: 58px;
    height: 58px;
  }

  .brand--icon-only .brand__mark {
    width: 140px;
  }

  .hero__glass,
  .hero__mosaic {
    width: 100%;
  }

  .hero__mosaic {
    grid-template-columns: 1fr;
  }

  .card__body,
  .contact-form {
    padding: 18px;
  }
}