:root {
  --purple: #914ff7;
  --purple-soft: #f0e9ff;
  --deep: #0b0448;
  --deep-2: #180a63;
  --ink: #20203a;
  --muted: #6a6a80;
  --bg: #f6f6fb;
  --card: #ffffff;
  --line: #e5e1f2;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.65;
}

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

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

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}

#site-header {
  position: sticky;
  top: 0;
  z-index: 50;
}

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

.topbar .container {
  width: 100%;
  max-width: none;
  padding: 0 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  white-space: nowrap;
}

.brand img {
  height: 32px;
  width: auto;
}

.brand-slogan {
  padding-left: 10px;
  border-left: 1px solid var(--line);
  color: #59595c;
  font-size: 14px;
  white-space: nowrap;
}

.brand-name {
  font-weight: 800;
  font-size: 20px;
  color: var(--deep);
  letter-spacing: 0;
}

.nav {
  display: flex;
  gap: 4px;
  align-items: center;
  overflow-x: auto;
}

.nav a {
  padding: 9px 13px;
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
}

.nav a:hover {
  background: var(--purple-soft);
  color: var(--purple);
}

.nav a.active {
  background: var(--deep);
  color: #fff;
}

.hero {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  color: #fff;
  background: var(--deep);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 4, 72, 0.42), rgba(11, 4, 72, 0.82));
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 88px 0;
}

.hero-kicker {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 999px;
  font-size: 14px;
  background: rgba(255, 255, 255, 0.08);
}

.hero h1 {
  margin: 20px 0 16px;
  font-size: clamp(34px, 5vw, 62px);
  line-height: 1.2;
  letter-spacing: 0;
}

.hero p {
  max-width: 660px;
  margin: 0;
  font-size: 18px;
  color: rgba(255, 255, 255, 0.9);
}

.hero-meta {
  margin-top: 26px;
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.78);
}

.section {
  padding: 72px 0;
}

.section.alt {
  background: #fff;
}

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

.section-head {
  max-width: 780px;
  margin-bottom: 34px;
}

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

h2 {
  margin: 8px 0 12px;
  color: var(--deep);
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.25;
  letter-spacing: 0;
}

.lead {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 18px;
  text-align: center;
  box-shadow: 0 10px 24px rgba(11, 4, 72, 0.06);
}

.stat-num {
  font-size: 40px;
  font-weight: 900;
  color: var(--purple);
  line-height: 1.1;
}

.stat-label {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
}

.slide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.slide-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: 0 12px 28px rgba(11, 4, 72, 0.08);
}

.slide-block.wide {
  grid-column: 1 / -1;
}

.slide-block img {
  width: 100%;
  height: auto;
}

.slide-caption {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  background: #fbfaff;
  color: var(--muted);
  font-size: 13px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 8px 20px rgba(11, 4, 72, 0.05);
}

.card h3 {
  margin: 0 0 8px;
  color: var(--deep);
  font-size: 19px;
  letter-spacing: 0;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.card.highlight {
  border-color: var(--purple);
  background: linear-gradient(180deg, #fff, #faf7ff);
}

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

.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}

.step-num {
  display: inline-block;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--purple);
  color: #fff;
  font-weight: 800;
  text-align: center;
  line-height: 38px;
  margin-bottom: 12px;
}

.step h3 {
  margin: 0 0 6px;
  color: var(--deep);
  font-size: 18px;
}

.step p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.compare-table th,
.compare-table td {
  border: 1px solid var(--line);
  padding: 13px 14px;
  text-align: left;
  font-size: 14px;
  vertical-align: top;
}

.compare-table th {
  background: var(--deep);
  color: #fff;
  font-weight: 700;
}

.compare-table td:first-child {
  font-weight: 700;
  color: var(--deep);
  background: #faf8ff;
}

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

.mentor-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 8px 20px rgba(11, 4, 72, 0.05);
}

.mentor-photo {
  aspect-ratio: 1 / 1;
  overflow: hidden;
  background: var(--purple-soft);
}

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

.mentor-body {
  padding: 14px 16px 16px;
}

.mentor-body h3 {
  margin: 0 0 4px;
  color: var(--deep);
  font-size: 17px;
}

.mentor-body .school {
  color: var(--purple);
  font-size: 13px;
  font-weight: 700;
}

.mentor-body p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
}

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

.offer-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: #fff;
  padding: 10px;
}

.offer-item img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.profile-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.profile-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 8px 20px rgba(11, 4, 72, 0.05);
}

.profile-card.wide {
  grid-column: 1 / -1;
}

.profile-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 18px;
}

.profile-photo {
  flex: 0 0 auto;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--purple-soft);
}

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

.profile-head h3 {
  margin: 0;
  color: var(--deep);
  font-size: 22px;
}

.profile-en {
  margin-top: 2px;
  color: var(--muted);
  font-size: 14px;
}

.profile-meta {
  margin: 0;
  display: grid;
  gap: 13px;
}

.profile-meta dt {
  color: var(--purple);
  font-size: 13px;
  font-weight: 800;
}

.profile-meta dd {
  margin: 3px 0 0;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.7;
}

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

.team-item {
  margin: 0;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.team-item.wide {
  grid-column: span 2;
}

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

.faq {
  max-width: 880px;
  margin: 0 auto;
}

.faq details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 10px;
  padding: 0 18px;
}

.faq summary {
  cursor: pointer;
  padding: 16px 0;
  font-weight: 700;
  color: var(--deep);
  list-style: none;
}

.faq summary::after {
  content: "+";
  float: right;
  color: var(--purple);
  font-size: 20px;
}

.faq details[open] summary::after {
  content: "−";
}

.faq p {
  margin: 0;
  padding-bottom: 16px;
  color: var(--muted);
  font-size: 15px;
}

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

.split img {
  border-radius: var(--radius);
  width: 100%;
}

.founder-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
}

.founder-card {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 8px 20px rgba(11, 4, 72, 0.05);
}

.founder-photo {
  width: 150px;
  height: 170px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--purple-soft);
}

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

.founder-card h3 {
  margin: 0 0 6px;
  color: var(--deep);
  font-size: 20px;
}

.founder-role {
  color: var(--purple);
  font-size: 14px;
  font-weight: 700;
}

.founder-card p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
}

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

.qr-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  text-align: center;
}

.qr-card img {
  width: 150px;
  height: 150px;
  margin: 0 auto 12px;
  object-fit: contain;
  background: #fff;
}

.qr-card h3 {
  margin: 0;
  color: var(--deep);
  font-size: 17px;
}

.qr-card p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.note {
  margin-top: 22px;
  padding: 16px 18px;
  border-left: 4px solid var(--purple);
  background: #fff;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  margin-top: 72px;
  background: var(--deep);
  color: #e8e6f6;
  padding: 52px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 34px;
  padding-bottom: 38px;
}

.footer-brand img {
  height: 56px;
  width: auto;
  margin-bottom: 14px;
}

.footer-slogan {
  margin: 0;
  color: #c9c4e6;
  font-size: 15px;
}

.footer-address {
  margin-top: 61px;
  display: grid;
  gap: 9px;
  max-width: 330px;
}

.footer-address-title {
  color: #fff;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0;
}

.footer-address-item {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  color: #c9c4e6;
  font-size: 13px;
  line-height: 1.5;
}

.footer-address-item svg {
  flex: 0 0 auto;
  margin-top: 3px;
  color: #914ff7;
}

.site-footer h4 {
  margin: 0 0 14px;
  color: #fff;
  font-size: 16px;
}

.footer-links a {
  display: block;
  padding: 5px 0;
  color: #c9c4e6;
  font-size: 14px;
}

.footer-links a:hover {
  color: #fff;
}

.footer-qr {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.footer-qr .qr {
  text-align: center;
  font-size: 12px;
  color: #c9c4e6;
}

.footer-qr img {
  width: 92px;
  height: 92px;
  margin: 0 auto 6px;
  object-fit: contain;
  background: #fff;
  border-radius: 6px;
  padding: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  padding: 16px 0;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  color: #b9b4d6;
  font-size: 13px;
}

.footer-disclaimer {
  padding: 0 0 20px;
  color: #b9b4d6;
  font-size: 12px;
  line-height: 1.7;
  text-align: left;
}

@media (max-width: 960px) {
  .stats,
  .cards,
  .timeline,
  .founder-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .slide-grid,
  .split {
    grid-template-columns: 1fr;
  }

  .why-grid,
  .profile-grid {
    grid-template-columns: 1fr;
  }

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

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

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

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

@media (max-width: 640px) {
  .topbar-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 12px 0;
  }

  .nav {
    width: 100%;
    padding-bottom: 2px;
  }

  .hero {
    min-height: 78vh;
  }

  .section {
    padding: 52px 0;
  }

  .stats,
  .cards,
  .timeline,
  .mentor-grid,
  .founder-grid {
    grid-template-columns: 1fr;
  }

  .founder-card {
    grid-template-columns: 110px 1fr;
  }

  .founder-photo {
    width: 110px;
    height: 130px;
  }

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