:root {
  --ink: #102033;
  --muted: #627085;
  --line: #dfe5ec;
  --paper: #ffffff;
  --soft: #f4f7fa;
  --navy: #142a46;
  --teal: #0e8b91;
  --gold: #c69a45;
  --shadow: 0 18px 48px rgba(16, 32, 51, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 100%;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 72px);
  color: #fff;
  transition: background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

.site-header.scrolled,
.site-header.nav-open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 10px 28px rgba(16, 32, 51, 0.1);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  min-width: 0;
}

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 8px 18px rgba(0, 0, 0, 0.12);
}

.site-header.scrolled .brand-mark,
.site-header.nav-open .brand-mark {
  border-color: rgba(16, 32, 51, 0.12);
  background: #fff;
  box-shadow: 0 8px 18px rgba(16, 32, 51, 0.08);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

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

.brand small {
  color: currentColor;
  font-size: 12px;
  opacity: 0.78;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
}

.main-nav a {
  opacity: 0.9;
}

.main-nav a:hover {
  opacity: 1;
}

.nav-cta {
  padding: 9px 15px;
  border: 1px solid currentColor;
  border-radius: 6px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 6px;
  color: inherit;
  background: transparent;
}

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

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
}

.hero picture,
.hero picture img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero picture img {
  object-fit: cover;
}

.hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10, 24, 40, 0.84), rgba(10, 24, 40, 0.48) 46%, rgba(10, 24, 40, 0.12));
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(720px, calc(100% - 40px));
  margin-left: clamp(20px, 8vw, 112px);
  padding-top: 84px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(48px, 8vw, 92px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 620px;
  margin: 22px 0 32px;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(17px, 2vw, 22px);
}

.hero-actions,
.campus-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.primary-button,
.secondary-button,
.gallery-button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  cursor: pointer;
}

.primary-button {
  border: 1px solid var(--teal);
  padding: 0 22px;
  color: #fff;
  background: var(--teal);
  font-weight: 700;
}

.secondary-button {
  border: 1px solid rgba(255, 255, 255, 0.58);
  padding: 0 22px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.hero-metrics {
  position: absolute;
  right: clamp(20px, 6vw, 84px);
  bottom: 28px;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(110px, 1fr));
  gap: 1px;
  overflow: hidden;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.24);
  backdrop-filter: blur(14px);
}

.hero-metrics span {
  min-height: 74px;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 4px;
  padding: 12px 18px;
  background: rgba(10, 24, 40, 0.34);
  color: rgba(255, 255, 255, 0.84);
  font-size: 14px;
}

.hero-metrics strong {
  color: #fff;
  font-size: 26px;
  line-height: 1;
}

.hero-metrics em {
  font-style: normal;
  line-height: 1.15;
}

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

section:not(.hero) {
  scroll-margin-top: 82px;
  padding: 92px 0;
}

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

.intro-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.82fr) minmax(300px, 1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: start;
}

.intro h2,
.section-heading h2,
.campus-copy h2,
.consult h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
}

.intro p:last-child,
.section-heading p,
.campus-copy p,
.consult p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.intro-copy {
  display: grid;
  gap: 16px;
}

.intro-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.intro-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 8px;
}

.intro-stats span {
  min-height: 96px;
  display: grid;
  align-content: center;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--muted);
}

.intro-stats strong {
  display: block;
  color: var(--teal);
  font-size: 30px;
  line-height: 1.1;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.section-heading.compact {
  max-width: none;
}

.section-heading h2 {
  margin-bottom: 14px;
}

.service-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 28px;
  align-items: stretch;
}

.service-tabs {
  display: grid;
  gap: 10px;
}

.service-tab {
  min-height: 54px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  background: #fff;
  text-align: left;
  cursor: pointer;
}

.service-tab.active {
  border-color: var(--teal);
  color: #fff;
  background: var(--teal);
}

.service-panel {
  min-height: 380px;
  display: grid;
  align-content: center;
  padding: clamp(28px, 5vw, 56px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(14, 139, 145, 0.1), rgba(198, 154, 69, 0.08)),
    #fff;
  box-shadow: var(--shadow);
}

.panel-label {
  width: max-content;
  margin-bottom: 18px;
  padding: 5px 10px;
  border-radius: 6px;
  color: var(--teal);
  background: rgba(14, 139, 145, 0.12);
  font-size: 13px;
  font-weight: 700;
}

.service-panel h3,
.steps h3,
.advantage-grid h3 {
  margin: 0 0 10px;
  font-size: 24px;
}

.service-panel p {
  max-width: 720px;
  margin: 0 0 20px;
  color: var(--muted);
  font-size: 18px;
}

.service-panel ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.service-panel li {
  position: relative;
  padding-left: 20px;
}

.service-panel li::before {
  content: "";
  position: absolute;
  top: 12px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
}

.cases {
  background: #f7faf8;
}

.case-gallery {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.case-card {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(16, 32, 51, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.case-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 42px rgba(16, 32, 51, 0.14);
}

.case-card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
}

.solution {
  background: #f5f8f6;
}

.solution-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 240px;
  gap: 22px;
  align-items: stretch;
  margin-bottom: 20px;
  padding: clamp(26px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(14, 139, 145, 0.12), rgba(198, 154, 69, 0.12)),
    #fff;
  box-shadow: var(--shadow);
}

.solution-hero h3 {
  margin: 0 0 14px;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.22;
}

.solution-hero p {
  max-width: 820px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.solution-score {
  display: grid;
  place-items: center;
  align-content: center;
  min-height: 190px;
  border-radius: 8px;
  color: #fff;
  background: var(--navy);
  text-align: center;
}

.solution-score strong {
  display: block;
  font-size: 52px;
  line-height: 1;
}

.solution-score span {
  max-width: 150px;
  color: rgba(255, 255, 255, 0.78);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.solution-grid article {
  min-height: 210px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.solution-grid h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.solution-grid p {
  margin: 0;
  color: var(--muted);
}

.solution-process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.solution-process article {
  min-height: 190px;
  padding: 22px;
  border: 1px solid rgba(14, 139, 145, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
}

.solution-process span {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--gold);
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
}

.solution-process h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.solution-process p {
  margin: 0;
  color: var(--muted);
}

.faculty {
  background: #fff;
}

.faculty-overview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}

.faculty-overview article {
  min-height: 118px;
  display: grid;
  align-content: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(14, 139, 145, 0.08), rgba(201, 153, 51, 0.08));
}

.faculty-overview strong {
  color: var(--teal);
  font-size: 38px;
  line-height: 1;
}

.faculty-overview span {
  margin-top: 8px;
  color: var(--muted);
}

.faculty-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.faculty-grid article {
  min-height: 246px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
}

.faculty-grid span {
  display: inline-block;
  margin-bottom: 34px;
  color: var(--gold);
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
}

.faculty-grid h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.faculty-grid p {
  margin: 0;
  color: var(--muted);
}

.classroom-feature {
  display: block;
  overflow: hidden;
  width: 100%;
  margin-bottom: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.classroom-feature img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.classroom-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.classroom-grid a {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 30px rgba(16, 32, 51, 0.08);
}

.classroom-grid img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

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

.steps article,
.advantage-grid article {
  min-height: 230px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.steps span {
  display: inline-block;
  margin-bottom: 34px;
  color: var(--teal);
  font-size: 24px;
  font-weight: 800;
  line-height: 1;
}

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

.campus-grid,
.consult-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.86fr) minmax(360px, 1.14fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
}

.campus-copy p {
  margin: 18px 0 28px;
}

.gallery-button {
  border: 1px solid var(--line);
  padding: 0 14px;
  color: var(--ink);
  background: #fff;
}

.gallery-button.active {
  border-color: var(--navy);
  color: #fff;
  background: var(--navy);
}

.campus-photo {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
  background: var(--soft);
  box-shadow: var(--shadow);
}

.campus-photo img {
  width: 100%;
  aspect-ratio: 1.45;
  object-fit: cover;
}

.campus-photo figcaption {
  position: absolute;
  left: 18px;
  bottom: 18px;
  padding: 7px 11px;
  border-radius: 6px;
  color: #fff;
  background: rgba(16, 32, 51, 0.72);
  font-size: 14px;
}

.consult {
  background: linear-gradient(135deg, var(--navy), #0d424b);
  color: #fff;
}

.consult .section-kicker,
.consult p,
.consult dd {
  color: rgba(255, 255, 255, 0.78);
}

.contact-list {
  display: grid;
  gap: 18px;
  margin: 34px 0 0;
}

.contact-list div {
  padding-left: 18px;
  border-left: 3px solid var(--gold);
}

.contact-list dt {
  font-weight: 800;
}

.contact-list dd {
  margin: 2px 0 0;
}

.qr-contact-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 28px;
}

.qr-card {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 118px;
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  transition: transform 0.2s ease, background 0.2s ease;
}

.qr-card:hover {
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.12);
}

.qr-card img {
  width: 82px;
  height: 82px;
  border-radius: 6px;
  background: #fff;
  object-fit: cover;
  object-position: center;
}

.qr-card strong,
.qr-card small {
  display: block;
}

.qr-card strong {
  color: #fff;
  font-size: 17px;
}

.qr-card small {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.consult-form {
  display: grid;
  gap: 16px;
  padding: clamp(24px, 4vw, 36px);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.22);
}

.consult-form label {
  display: grid;
  gap: 7px;
  color: var(--ink);
  font-weight: 700;
}

.consult-form input,
.consult-form select,
.consult-form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 12px 13px;
  color: var(--ink);
  background: #fff;
}

.consult-form textarea {
  resize: vertical;
}

.form-button {
  width: 100%;
  margin-top: 4px;
}

.consult-form .form-note {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.consult-form .form-note a {
  color: var(--teal);
  font-weight: 800;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer {
  padding: 28px 0;
  color: rgba(255, 255, 255, 0.78);
  background: #081522;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-grid p {
  margin: 0;
}

.footer-grid p + p {
  margin-top: 12px;
}

.footer-qq {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  padding: 10px 14px 10px 10px;
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.footer-qq:hover {
  background: rgba(255, 255, 255, 0.14);
}

.qq-icon {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  font-size: 11px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0;
  background: #1683e8;
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.72);
}

@media (max-width: 940px) {
  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 76px;
    left: 0;
    width: 100%;
    display: none;
    padding: 14px 20px 22px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 18px 30px rgba(16, 32, 51, 0.1);
  }

  .main-nav.open {
    display: grid;
    gap: 14px;
  }

  .nav-cta {
    width: max-content;
  }

  .hero {
    min-height: 860px;
    align-items: flex-start;
  }

  .hero-shade {
    background: linear-gradient(180deg, rgba(10, 24, 40, 0.82), rgba(10, 24, 40, 0.54) 60%, rgba(10, 24, 40, 0.2));
  }

  .hero-content {
    margin: 0 auto;
    padding-top: 132px;
  }

  .hero-metrics {
    right: 20px;
    left: 20px;
    grid-template-columns: 1fr;
  }

  .intro-grid,
  .service-layout,
  .campus-grid,
  .consult-grid {
    grid-template-columns: 1fr;
  }

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

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

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

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

  .solution-hero,
  .solution-grid,
  .solution-process,
  .faculty-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 620px) {
  .site-header {
    height: 68px;
    padding: 0 16px;
  }

  .brand-mark {
    width: 42px;
    height: 42px;
  }

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

  .brand small {
    font-size: 11px;
  }

  .main-nav {
    top: 68px;
  }

  .hero {
    min-height: 820px;
  }

  .hero-content {
    width: calc(100% - 32px);
    padding-top: 112px;
  }

  .hero h1 {
    font-size: 46px;
  }

  .hero-actions {
    display: grid;
  }

  .hero-metrics {
    bottom: 18px;
  }

  section:not(.hero) {
    padding: 64px 0;
  }

  .section-inner {
    width: calc(100% - 32px);
  }

  .service-tabs,
  .steps,
  .advantage-grid,
  .qr-contact-grid,
  .intro-stats,
  .faculty-overview {
    grid-template-columns: 1fr;
  }

  .case-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

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

  .service-panel {
    min-height: 0;
  }

  .campus-photo img {
    aspect-ratio: 1.05;
  }

  .footer-grid {
    display: grid;
  }

  .footer-qq {
    width: fit-content;
  }
}