:root {
  --brand: #2F6BFF;
  --brand-dark: #1E4FD6;
  --brand-soft: #EAF0FF;
  --ink: #1A1F36;
  --ink-2: #3D4663;
  --muted: #6B7390;
  --line: #E6EAF2;
  --bg: #FFFFFF;
  --bg-soft: #F5F7FC;
  --bg-hero: linear-gradient(165deg, #EEF3FF 0%, #F8FAFF 42%, #FFFFFF 100%);
  --shadow: 0 18px 50px rgba(47, 107, 255, 0.08);
  --radius: 16px;
  --max: 1120px;
  --nav-h: 72px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--brand);
  text-decoration: none;
}

a:hover {
  color: var(--brand-dark);
}

.container {
  width: min(100% - 40px, var(--max));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px rgba(26, 31, 54, 0.04);
}

.nav-inner {
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
}

.logo:hover {
  color: var(--ink);
}

.logo-img {
  height: 44px;
  width: auto;
  display: block;
}

.logo-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand), #6B93FF);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(47, 107, 255, 0.28);
}

.vip-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.vip-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 480px;
}

.vip-table th,
.vip-table td {
  padding: 14px 18px;
  text-align: center;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
}

.vip-table th {
  background: var(--bg-soft);
  color: var(--ink);
  font-weight: 600;
}

.vip-table th:first-child,
.vip-table td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--ink);
}

.vip-table tr:last-child td {
  border-bottom: 0;
}

.vip-table .yes {
  color: var(--brand);
  font-weight: 700;
}

.vip-table .no {
  color: #B0B6C8;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  padding: 8px 14px;
  color: var(--ink-2);
  font-size: 15px;
  font-weight: 500;
  border-radius: 999px;
  transition: background 0.2s, color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--brand);
  background: var(--brand-soft);
}

.nav-links a.nav-cta {
  margin-left: 8px;
  background: var(--brand);
  color: #fff;
  padding: 10px 18px;
}

.nav-links a.nav-cta:hover,
.nav-links a.nav-cta.active {
  background: var(--brand-dark);
  color: #fff;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
}

/* Hero */
.hero {
  background: var(--bg-hero);
  padding: 72px 0 88px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: auto -10% -40% 40%;
  height: 70%;
  background: radial-gradient(circle, rgba(47, 107, 255, 0.12), transparent 65%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  position: relative;
}

.brand-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--brand);
  font-weight: 600;
  font-size: 14px;
  margin-bottom: 18px;
}

.brand-tag::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand);
}

.hero h1 {
  margin: 0 0 18px;
  font-family: var(--display);
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--ink);
}

.hero-lead {
  margin: 0 0 32px;
  font-size: 18px;
  color: var(--ink-2);
  max-width: 34em;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.15s, background 0.2s, color 0.2s, border-color 0.2s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--brand);
  color: #fff;
}

.btn-primary:hover {
  background: var(--brand-dark);
  color: #fff;
}

.btn-secondary {
  background: #fff;
  color: var(--ink);
  border-color: var(--line);
}

.btn-secondary:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.hero-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  padding: 28px;
  animation: rise 0.7s ease both;
}

.hero-panel h2 {
  margin: 0 0 8px;
  font-size: 22px;
}

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.hero-stat {
  background: var(--bg-soft);
  border-radius: 14px;
  padding: 16px 12px;
  text-align: center;
}

.hero-stat strong {
  display: block;
  font-size: 20px;
  color: var(--brand);
  margin-bottom: 4px;
}

.hero-stat span {
  font-size: 13px;
  color: var(--muted);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* Sections */
.section {
  padding: 88px 0;
}

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

.section-head {
  max-width: 720px;
  margin-bottom: 40px;
}

.section-head h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 3.4vw, 36px);
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.section-head p {
  margin: 0;
  color: var(--ink-2);
  font-size: 16px;
}

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

.feature-item {
  padding: 24px 22px;
  border-top: 2px solid var(--brand);
}

.feature-item h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

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

.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 8px 8px 8px 0;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--brand);
  margin-bottom: 12px;
  letter-spacing: -0.04em;
}

.step h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

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

.model-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.model-block {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

.model-block h3 {
  margin: 0 0 12px;
  font-size: 20px;
}

.model-block ul {
  margin: 0;
  padding-left: 18px;
  color: var(--ink-2);
}

.model-block li {
  margin: 8px 0;
}

.cta-band {
  background: linear-gradient(135deg, #2F6BFF, #4B82FF 55%, #6B93FF);
  color: #fff;
  border-radius: 24px;
  padding: 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.cta-band h2 {
  margin: 0 0 8px;
  font-size: 28px;
}

.cta-band p {
  margin: 0;
  opacity: 0.92;
}

.cta-band .btn-secondary {
  background: #fff;
  color: var(--brand);
  border-color: transparent;
}

.page-hero {
  padding: 56px 0 28px;
  background: var(--bg-hero);
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  margin: 0 0 12px;
  font-size: clamp(30px, 4vw, 42px);
  letter-spacing: -0.02em;
}

.page-hero p {
  margin: 0;
  max-width: 46em;
  color: var(--ink-2);
  font-size: 16px;
}

.content-block {
  max-width: 820px;
}

.content-block h2 {
  margin: 36px 0 12px;
  font-size: 24px;
}

.content-block h3 {
  margin: 24px 0 8px;
  font-size: 18px;
}

.content-block p,
.content-block li {
  color: var(--ink-2);
}

.content-block ol,
.content-block ul {
  padding-left: 20px;
}

.content-block li {
  margin: 8px 0;
}

.note-box {
  background: var(--brand-soft);
  border-left: 3px solid var(--brand);
  border-radius: 0 12px 12px 0;
  padding: 16px 18px;
  margin: 20px 0;
  color: var(--ink-2);
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0 28px;
}

.info-table th,
.info-table td {
  border: 1px solid var(--line);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

.info-table th {
  width: 180px;
  background: var(--bg-soft);
  color: var(--ink);
  font-weight: 600;
}

.download-box {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
}

.download-box h2 {
  margin: 0 0 12px;
}

.download-box p {
  margin: 0 0 18px;
  color: var(--ink-2);
  font-size: 17px;
}

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

.legal-links a {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.2s, color 0.2s;
}

.legal-links a:hover {
  border-color: var(--brand);
  color: var(--brand);
}

.legal-links span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

/* Legal document */
.legal-page {
  background: var(--bg-soft);
}

.legal-wrap {
  width: min(100% - 40px, 920px);
  margin: 28px auto 64px;
}

.legal-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.legal-meta {
  padding: 28px 28px 18px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #F7F9FF, #fff);
}

.legal-meta h1 {
  margin: 0 0 12px;
  font-size: 28px;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-size: 13px;
}

.legal-toc {
  padding: 20px 28px;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}

.legal-toc h2 {
  margin: 0 0 10px;
  font-size: 15px;
  color: var(--muted);
}

.legal-toc ol {
  margin: 0;
  padding-left: 18px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 6px 16px;
}

.legal-body {
  padding: 8px 28px 32px;
}

.legal-body h2 {
  margin: 28px 0 12px;
  font-size: 18px;
  padding-left: 10px;
  border-left: 3px solid var(--brand);
}

.legal-body h3 {
  margin: 18px 0 8px;
  font-size: 16px;
}

.legal-body p,
.legal-body li {
  color: var(--ink-2);
}

.legal-body .notice {
  margin: 18px 0;
  padding: 14px 16px;
  border-radius: 12px;
  background: #FFF6F4;
  border: 1px solid #FFD9D2;
  color: #7A3B32;
}

.back-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
  font-size: 12px;
}

/* Footer */
.site-footer {
  background: #12172A;
  color: #C8CEE0;
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 28px;
  margin-bottom: 36px;
}

.footer-brand {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

.site-footer ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer li {
  margin: 8px 0;
}

.site-footer a {
  color: #C8CEE0;
  font-size: 14px;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 20px;
  font-size: 13px;
  color: #8E97B3;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  justify-content: space-between;
}

.footer-bottom a {
  color: #8E97B3;
}

@media (max-width: 960px) {
  .hero-grid,
  .model-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px 20px 18px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 16px 30px rgba(26, 31, 54, 0.08);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a.nav-cta {
    margin-left: 0;
    justify-content: center;
  }

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

  .hero,
  .section {
    padding: 56px 0;
  }

  .legal-meta,
  .legal-toc,
  .legal-body {
    padding-left: 18px;
    padding-right: 18px;
  }
}