:root {
  --deep: #5B36C8;
  --primary: #8B5CF6;
  --accent: #C084FC;
  --highlight: #C084FC;
  --ink: #111827;
  --title: #243044;
  --muted: #667085;
  --line: #d9e2ef;
  --line-soft: #e3e9f3;
  --soft: #F3ECFF;
  --bg: #f6f8fb;
  --paper: #ffffff;
  --shadow: 0 18px 46px rgba(31, 60, 110, 0.12);
  --shadow-strong: 0 22px 54px rgba(31, 60, 110, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

.site-shell {
  overflow: hidden;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 7vw;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 280px;
}

.brand img {
  width: 42px;
  height: 42px;
  display: block;
}

.brand strong {
  display: block;
  color: var(--deep);
  font-size: 18px;
  line-height: 1.12;
  font-weight: 900;
}

.brand em {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: #3b4d66;
  font-size: 14px;
  font-weight: 800;
}

.nav-links a:hover {
  color: var(--primary);
}

.nav-cta {
  padding: 9px 18px;
  color: var(--primary);
  border: 1px solid rgba(139, 92, 246, 0.48);
  border-radius: 4px;
  background: #fff;
  font-size: 14px;
  font-weight: 850;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.hero {
  position: relative;
  min-height: 390px;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(115deg, var(--deep) 0%, var(--primary) 58%, var(--accent) 100%);
  box-shadow: var(--shadow-strong);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(120deg, transparent 0 52%, rgba(255, 255, 255, 0.14) 52% 70%, transparent 70%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: auto, 54px 54px, 54px 54px;
  opacity: 0.82;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  align-items: center;
  gap: 30px;
  padding: 42px max(7vw, calc((100vw - 1180px) / 2)) 48px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin: 0 0 14px;
  padding: 0 11px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 4px;
  color: rgba(255, 255, 255, 0.92);
  background: rgba(255, 255, 255, 0.16);
  font-size: 12px;
  font-weight: 850;
}

.eyebrow::before {
  width: 7px;
  height: 7px;
  margin-right: 8px;
  content: "";
  border-radius: 50%;
  background: var(--highlight);
  box-shadow: 0 0 16px rgba(255, 255, 255, 0.45);
}

h1 {
  margin: 0 0 13px;
  color: #fff;
  font-size: 42px;
  line-height: 1.12;
  letter-spacing: 0;
  font-weight: 900;
}

.hero-lead {
  max-width: 650px;
  margin: 0;
  color: rgba(232, 243, 255, 0.9);
  font-size: 20px;
  line-height: 1.5;
  font-weight: 900;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 138px;
  height: 44px;
  color: #fff;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--primary), var(--deep));
  box-shadow: 0 12px 26px rgba(91, 54, 200, 0.3);
  font-size: 15px;
  font-weight: 850;
}

.button.primary {
  color: #fff;
}

.button.ghost {
  color: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.16);
  box-shadow: none;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 20px;
  max-width: 640px;
}

.stat {
  padding: 11px 12px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.16);
}

.stat strong {
  display: block;
  color: #fff;
  font-size: 21px;
  line-height: 1;
  font-weight: 900;
}

.stat span {
  display: block;
  margin-top: 6px;
  color: rgba(232, 243, 255, 0.76);
  font-size: 12px;
  font-weight: 750;
}

.hero-visual {
  position: relative;
  min-height: 290px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.16);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
  overflow: hidden;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 16px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 6px;
  z-index: 1;
  pointer-events: none;
}

.hero-visual img {
  position: absolute;
  inset: 24px;
  width: calc(100% - 48px);
  height: calc(100% - 48px);
  object-fit: cover;
  display: block;
  border-radius: 6px;
  opacity: 0.9;
  mix-blend-mode: screen;
}

.float-card {
  position: absolute;
  right: 28px;
  bottom: 28px;
  z-index: 2;
  max-width: 270px;
  padding: 13px 15px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 6px;
  color: #fff;
  background: rgba(91, 54, 200, 0.76);
}

.float-card strong {
  display: block;
  margin-bottom: 5px;
  color: #fff;
  font-size: 15px;
  font-weight: 900;
}

.float-card span {
  color: rgba(232, 243, 255, 0.78);
  font-size: 12px;
  line-height: 1.65;
  font-weight: 650;
}

main > section:not(.hero) {
  width: min(1180px, 86vw);
  margin: 0 auto;
  padding: 78px 0;
}

main > section:nth-of-type(odd):not(.hero) {
  background: var(--soft);
  box-shadow: 0 0 0 100vmax var(--soft);
  clip-path: inset(0 -100vmax);
}

.section-head {
  max-width: 900px;
  margin-bottom: 30px;
}

h2 {
  margin: 0;
  color: var(--ink);
  font-size: 34px;
  line-height: 1.24;
  letter-spacing: 0;
  font-weight: 900;
}

.section-head p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
  font-weight: 560;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}

.value-card,
.feature-card,
.case-group,
.step,
.exam-board,
.exam-copy {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(31, 60, 110, 0.06);
}

.value-card,
.feature-card,
.case-group,
.step {
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.value-card:hover,
.feature-card:hover,
.case-group:hover,
.step:hover {
  transform: translateY(-3px);
  border-color: rgba(139, 92, 246, 0.32);
  box-shadow: 0 18px 38px rgba(31, 60, 110, 0.12);
}

.value-card {
  min-height: 236px;
  padding: 22px;
}

.value-icon,
.feature-icon {
  position: relative;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  margin-bottom: 15px;
  border-radius: 6px;
  border: 1px solid rgba(139, 92, 246, 0.12);
  color: var(--primary);
  background: linear-gradient(135deg, #F3ECFF, #FFFFFF);
  box-shadow: 0 8px 18px rgba(139, 92, 246, 0.08);
  font-size: 16px;
  font-weight: 900;
  overflow: hidden;
}

.value-card:hover .value-icon,
.feature-card:hover .feature-icon {
  color: #fff;
  border-color: rgba(192, 132, 252, 0.42);
  background: linear-gradient(135deg, var(--primary), var(--highlight));
  box-shadow: 0 12px 24px rgba(139, 92, 246, 0.22);
}

.value-card h3,
.feature-card h3,
.step h3 {
  margin: 0;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.35;
  font-weight: 900;
}

.value-card p,
.feature-card p,
.step p,
.exam-copy p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
  font-weight: 540;
}

.loop {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 28px;
  align-items: center;
}

.loop-panel {
  width: auto !important;
  padding-right: 14px;
  color: var(--ink);
  background: transparent;
  box-shadow: none;
}

.loop-panel h2 {
  color: var(--ink);
  margin-bottom: 14px;
}

.loop-panel p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
  font-weight: 560;
}

.loop-tags {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.loop-tags span {
  display: flex;
  align-items: center;
  min-height: 46px;
  padding: 0 15px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: #fff;
  font-size: 14px;
  font-weight: 800;
}

.loop-tags span::before {
  width: 8px;
  height: 8px;
  margin-right: 10px;
  content: "";
  border-radius: 50%;
  background: var(--primary);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  padding: 24px;
}

.feature-icon {
  font-size: 13px;
}

.exam {
  display: grid;
  grid-template-columns: minmax(0, 0.58fr) minmax(320px, 0.42fr);
  gap: 22px;
  align-items: stretch;
}

.exam-board,
.exam-copy {
  padding: 28px;
  box-shadow: var(--shadow);
}

.exam-copy {
  background: var(--bg);
}

.exam-copy h3 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.25;
  font-weight: 900;
}

.metric-row {
  display: grid;
  grid-template-columns: 118px minmax(0, 1fr) 48px;
  gap: 16px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.metric-row:last-child {
  border-bottom: 0;
}

.metric-row span {
  color: var(--ink);
  font-weight: 850;
}

.metric-row strong {
  color: var(--primary);
  font-size: 18px;
}

.bar {
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: #F3ECFF;
}

.bar i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--primary), var(--highlight));
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 24px;
  color: var(--muted);
  line-height: 1.7;
  font-weight: 760;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 0.48em;
  width: 9px;
  height: 9px;
  content: "";
  border-radius: 50%;
  background: var(--highlight);
}

.cases {
  display: grid;
  grid-template-columns: minmax(350px, 0.5fr) minmax(0, 0.5fr);
  gap: 28px;
  align-items: center;
}

.cases > div:first-child > .hero-lead {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
  font-weight: 560;
}

.cases-visual img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.case-list {
  display: grid;
  gap: 14px;
}

.case-group {
  padding: 22px;
}

.case-group h3 {
  margin: 0 0 14px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 900;
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.case-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 11px;
  border: 1px solid #E8DDFD;
  border-radius: 4px;
  color: #5B36C8;
  background: #fff;
  font-size: 13px;
  line-height: 1.45;
  font-weight: 820;
}

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

.step {
  padding: 24px;
}

.step strong {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  margin-bottom: 15px;
  border-radius: 6px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--highlight));
  font-size: 15px;
  line-height: 1;
  font-weight: 900;
}

.cta {
  width: 100% !important;
  margin-top: 0 !important;
  padding: 78px max(7vw, calc((100vw - 1180px) / 2)) !important;
  color: var(--ink);
  background: linear-gradient(115deg, var(--deep) 0%, var(--primary) 58%, var(--accent) 100%);
  box-shadow: var(--shadow-strong);
}

.cta > * {
  margin-left: 0;
  margin-right: 0;
}

.cta h2 {
  width: fit-content;
  max-width: 820px;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.9);
}

.cta p {
  width: fit-content;
  max-width: 780px;
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 8px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.86);
  font-size: 16px;
  line-height: 1.85;
}

.cta .button {
  width: max-content;
  margin-top: 18px;
}

@media (max-width: 1040px) {
  .hero,
  .loop,
  .exam,
  .cases {
    grid-template-columns: 1fr;
  }

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

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

  .nav-links {
    display: none;
  }
}

@media (max-width: 760px) {
  .nav {
    padding: 0 18px;
  }

  .brand {
    min-width: 0;
  }

  .brand em {
    display: none;
  }

  .nav-cta {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 42px 18px;
  }

  h1 {
    font-size: 34px;
  }

  .hero-lead {
    font-size: 17px;
  }

  .hero-stats,
  .value-grid,
  .feature-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 260px;
  }

  .float-card {
    left: 28px;
    right: 28px;
    max-width: none;
  }

  .metric-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}