/* ===== Design tokens ===== */
:root {
  --c-bg: #ffffff;
  --c-bg-tint: #f5f8ff;
  --c-bg-dark: #0b1530;
  --c-text: #0f172a;
  --c-text-muted: #475569;
  --c-text-invert: #f8fafc;
  --c-text-invert-muted: #94a3b8;
  --c-primary: #1e5fd9;
  --c-primary-strong: #1747aa;
  --c-accent: #3b82f6;
  --c-accent-soft: #dbeafe;
  --c-border: #e2e8f0;
  --c-border-dark: #1e293b;
  --c-pilot: #0ea5e9;

  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;

  --shadow-card: 0 4px 24px -8px rgba(15, 23, 42, .08);
  --shadow-card-hover: 0 12px 32px -10px rgba(15, 23, 42, .18);

  --container: 1200px;
  --space-section: 96px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

/* 锚点跳转时让 section 上移，露出更多下方内容（仅锚点跳转生效，不影响视觉布局） */
section[id] { scroll-margin-top: -88px; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}
.site-header.is-scrolled {
  border-bottom-color: var(--c-border);
  background: rgba(255, 255, 255, .96);
}
.nav-wrap {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--c-primary);
  font-weight: 700;
}
.brand-mark {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: white;
  border-radius: 10px;
}
.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-en { font-size: 17px; letter-spacing: .5px; }
.brand-cn { font-size: 12px; color: var(--c-text-muted); font-weight: 500; }

.nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
  font-size: 15px;
}
.nav a {
  color: var(--c-text);
  font-weight: 500;
  position: relative;
  padding: 6px 0;
  transition: color .15s ease;
}
.nav a:hover { color: var(--c-primary); }
.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--c-primary);
  border-radius: 2px;
}

.nav-cta {
  display: flex;
  gap: 10px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 0;
  padding: 8px;
  margin-left: auto;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 18px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: transform .12s ease, background .15s ease, border-color .15s ease, color .15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--c-primary);
  color: white;
}
.btn-primary:hover { background: var(--c-primary-strong); }
.btn-ghost {
  background: transparent;
  color: var(--c-text);
  border-color: var(--c-border);
}
.btn-ghost:hover {
  border-color: var(--c-primary);
  color: var(--c-primary);
}
.btn-ghost-light {
  background: rgba(255, 255, 255, .08);
  color: white;
  border-color: rgba(255, 255, 255, .25);
}
.btn-ghost-light:hover {
  background: rgba(255, 255, 255, .15);
  border-color: rgba(255, 255, 255, .5);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 120px 0 100px;
  color: white;
  background: linear-gradient(160deg, #0b1530 0%, #102a5c 55%, #1e5fd9 120%);
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    radial-gradient(circle at 18% 30%, rgba(59, 130, 246, .35), transparent 45%),
    radial-gradient(circle at 80% 20%, rgba(14, 165, 233, .28), transparent 50%),
    radial-gradient(circle at 60% 90%, rgba(99, 102, 241, .25), transparent 55%);
  opacity: .9;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 40%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at 50% 40%, black 30%, transparent 75%);
}
.hero-inner {
  position: relative;
}
.eyebrow {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .5px;
  background: rgba(255, 255, 255, .1);
  color: rgba(255, 255, 255, .85);
  margin: 0 0 20px;
}
.hero-title {
  font-size: clamp(36px, 5.4vw, 60px);
  line-height: 1.15;
  letter-spacing: -.5px;
  margin: 0 0 24px;
  font-weight: 700;
}
.hero-title .accent {
  background: linear-gradient(120deg, #60a5fa, #38bdf8 60%, #a5f3fc);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  max-width: 720px;
  font-size: 17px;
  color: rgba(255, 255, 255, .82);
  margin: 0 0 48px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  max-width: 560px;
  padding: 24px 0 0;
  border-top: 1px solid rgba(255, 255, 255, .15);
}
.hero-stats > div {
  display: flex;
  flex-direction: column;
}
.hero-stats strong {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -.5px;
  background: linear-gradient(120deg, #ffffff, #cbd5f5);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-stats span {
  font-size: 13px;
  color: rgba(255, 255, 255, .65);
  margin-top: 2px;
}

/* ===== Generic section ===== */
.section {
  padding: var(--space-section) 0;
}
.section-tint { background: var(--c-bg-tint); }
.section-dark {
  background: var(--c-bg-dark);
  color: var(--c-text-invert);
}
.section-dark .eyebrow {
  background: rgba(255, 255, 255, .08);
  color: rgba(255, 255, 255, .8);
}
.section-dark .section-desc { color: rgba(255, 255, 255, .7); }

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}
.section-head h2 {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.25;
  letter-spacing: -.3px;
  margin: 8px 0 16px;
  font-weight: 700;
}
.section-desc {
  color: var(--c-text-muted);
  font-size: 16px;
  margin: 0;
}

/* ===== Categories ===== */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}
.cat-card {
  position: relative;
  padding: 28px 22px;
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.cat-card:hover {
  transform: translateY(-3px);
  border-color: var(--c-accent);
  box-shadow: var(--shadow-card-hover);
}
.cat-icon {
  font-size: 28px;
  margin-bottom: 14px;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  background: var(--c-accent-soft);
  border-radius: 12px;
}
.cat-card h3 {
  font-size: 17px;
  margin: 0 0 6px;
  font-weight: 600;
}
.cat-card p {
  font-size: 13px;
  color: var(--c-text-muted);
  margin: 0 0 14px;
  min-height: 38px;
}
.cat-tag {
  display: inline-block;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--c-bg-tint);
  color: var(--c-primary);
  font-weight: 500;
}

/* ===== Dual ===== */
.dual-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.dual-card {
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--r-xl);
  padding: 40px;
  transition: border-color .2s ease, transform .2s ease;
}
.dual-card:hover {
  border-color: rgba(255, 255, 255, .3);
  transform: translateY(-2px);
}
.dual-tag {
  display: inline-block;
  font-size: 13px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--c-primary);
  color: white;
  margin-bottom: 18px;
  font-weight: 500;
}
.dual-tag-pilot { background: var(--c-pilot); }
.dual-card h3 {
  font-size: 22px;
  margin: 0 0 22px;
  font-weight: 600;
}
.check-list {
  list-style: none;
  padding: 0;
  margin: 0 0 28px;
}
.check-list li {
  position: relative;
  padding: 8px 0 8px 28px;
  color: rgba(255, 255, 255, .82);
  font-size: 15px;
  border-bottom: 1px solid rgba(255, 255, 255, .06);
}
.check-list li:last-child { border-bottom: 0; }
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 4px rgba(59, 130, 246, .15);
}
.check-list li::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 18px;
  width: 8px;
  height: 4px;
  border-left: 2px solid white;
  border-bottom: 2px solid white;
  transform: rotate(-45deg);
}

/* ===== Features ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
.feature-card {
  position: relative;
  padding: 32px 24px;
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.feature-card:hover {
  border-color: var(--c-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.feature-num {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--c-primary);
  margin-bottom: 16px;
}
.feature-card h3 {
  font-size: 18px;
  margin: 0 0 10px;
  font-weight: 600;
}
.feature-card p {
  font-size: 14px;
  color: var(--c-text-muted);
  margin: 0;
  line-height: 1.7;
}

/* ===== Flow ===== */
.flow-wrap {
  margin-top: 80px;
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 48px 40px;
}
.flow-title {
  text-align: center;
  font-size: 20px;
  margin: 0 0 32px;
  font-weight: 600;
}
.flow {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 24px;
  counter-reset: step;
}
.flow li {
  display: flex;
  flex-direction: column;
  gap: 12px;
  position: relative;
}
.flow li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 18px;
  left: calc(100% - 12px);
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent), transparent);
}
.flow-step {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--c-primary);
  color: white;
  font-weight: 700;
  display: grid;
  place-items: center;
  font-size: 15px;
}
.flow strong {
  font-size: 15px;
  display: block;
  margin-bottom: 4px;
  color: var(--c-text);
}
.flow p {
  font-size: 13px;
  color: var(--c-text-muted);
  margin: 0;
  line-height: 1.6;
}

/* ===== Scenes ===== */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.scene-card {
  padding: 28px;
  background: white;
  border-radius: var(--r-lg);
  border: 1px solid var(--c-border);
  transition: transform .15s ease, box-shadow .15s ease;
}
.scene-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
}
.scene-card h3 {
  font-size: 17px;
  margin: 0 0 10px;
  font-weight: 600;
}
.scene-card p {
  font-size: 14px;
  color: var(--c-text-muted);
  margin: 0;
  line-height: 1.7;
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-text h2 {
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1.3;
  margin: 8px 0 20px;
  font-weight: 700;
}
.about-text p {
  color: var(--c-text-muted);
  font-size: 15px;
  margin: 0 0 16px;
}
.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.about-card {
  background: linear-gradient(160deg, #1747aa, #0b1530);
  border-radius: var(--r-xl);
  padding: 32px;
  color: white;
  text-align: center;
}
.qr-placeholder {
  width: 220px;
  height: 220px;
  margin: 0 auto 20px;
  background: white;
  border-radius: var(--r-md);
  display: grid;
  place-items: center;
  background-image:
    radial-gradient(circle at 10px 10px, #0b1530 4px, transparent 5px),
    radial-gradient(circle at 30px 30px, #0b1530 4px, transparent 5px);
  background-size: 20px 20px;
  position: relative;
}
.qr-inner {
  background: white;
  padding: 12px 18px;
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  z-index: 1;
}
.qr-inner span { font-size: 12px; color: var(--c-text-muted); }
.qr-inner strong { font-size: 22px; color: var(--c-primary); letter-spacing: 1px; }
.qr-inner small { font-size: 11px; color: var(--c-text-muted); }
.about-note {
  font-size: 13px;
  color: rgba(255, 255, 255, .75);
  margin: 0;
}

/* ===== Footer ===== */
.site-footer {
  background: #060c1f;
  color: var(--c-text-invert-muted);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 56px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--c-border-dark);
}
.footer-brand .brand { color: white; margin-bottom: 12px; }
.footer-brand p { margin: 0; font-size: 14px; }
.footer-col h4 {
  color: white;
  font-size: 14px;
  font-weight: 600;
  margin: 0 0 16px;
  letter-spacing: .5px;
}
.footer-col a, .footer-col span {
  display: block;
  font-size: 14px;
  margin-bottom: 10px;
  transition: color .15s ease;
}
.footer-col a:hover { color: white; }

.footer-bottom {
  max-width: var(--container);
  margin: 0 auto;
  padding: 24px;
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== Responsive ===== */
@media (max-width: 960px) {
  :root { --space-section: 72px; }
  .nav, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .site-header.menu-open .nav,
  .site-header.menu-open .nav-cta {
    display: flex;
  }
  .site-header.menu-open .nav-wrap {
    flex-wrap: wrap;
    height: auto;
    padding-bottom: 18px;
  }
  .site-header.menu-open .nav {
    flex-direction: column;
    width: 100%;
    margin-left: 0;
    gap: 4px;
    padding-top: 12px;
    border-top: 1px solid var(--c-border);
  }
  .site-header.menu-open .nav a {
    padding: 10px 4px;
    border-bottom: 1px solid var(--c-border);
  }
  .site-header.menu-open .nav-cta {
    width: 100%;
    flex-direction: column;
    gap: 10px;
    margin-top: 12px;
  }
  .site-header.menu-open .nav-cta .btn { width: 100%; }

  .cat-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .scene-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .dual-grid { grid-template-columns: 1fr; }
  .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
  .flow li:not(:last-child)::after { display: none; }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .hero { padding: 88px 0 72px; }
  .hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (max-width: 520px) {
  .cat-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
  .scene-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .dual-card { padding: 28px 24px; }
  .flow-wrap { padding: 32px 20px; }
}

/* ===== Join (加盟合作) ===== */
.btn-lg { height: 48px; padding: 0 28px; font-size: 15px; }

.section-head-wide { max-width: 1100px; }
.join-title,
.service-title {
  white-space: nowrap;
  font-size: clamp(22px, 2.6vw, 32px) !important;
}
@media (max-width: 880px) {
  .join-title,
  .service-title {
    white-space: normal;
    font-size: 22px !important;
  }
}

.join-window {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 0 auto 56px;
  max-width: 920px;
}
.join-window article {
  text-align: center;
  padding: 28px 20px;
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
}
.window-num {
  display: block;
  font-size: 38px;
  font-weight: 700;
  letter-spacing: -.5px;
  color: var(--c-primary);
  line-height: 1;
  margin-bottom: 8px;
}
.join-window p {
  margin: 0;
  font-size: 13px;
  color: var(--c-text-muted);
  line-height: 1.6;
}

.tier-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 24px;
  margin-bottom: 56px;
}
.tier-card {
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 36px;
  position: relative;
  overflow: hidden;
}
.tier-card.tier-region {
  background: linear-gradient(160deg, #ffffff 0%, #f0f6ff 100%);
  border-color: var(--c-accent);
}
.tier-region::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
}
.tier-head {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding-bottom: 24px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--c-border);
}
.tier-no {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--c-primary);
  background: var(--c-accent-soft);
  padding: 6px 12px;
  border-radius: 8px;
  flex-shrink: 0;
}
.tier-tag {
  display: inline-block;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--c-primary);
  color: white;
  margin-bottom: 8px;
}
.tier-tag-city { background: var(--c-pilot); }
.tier-card h3 {
  font-size: 22px;
  margin: 0 0 6px;
  font-weight: 600;
}
.tier-deck {
  font-size: 13px;
  color: var(--c-text-muted);
  margin: 0;
}
.tier-block {
  margin-bottom: 24px;
}
.tier-block:last-child { margin-bottom: 0; }
.tier-block h4 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--c-primary);
  margin: 0 0 12px;
  text-transform: uppercase;
}
.tier-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.tier-list li {
  position: relative;
  padding: 6px 0 6px 22px;
  font-size: 14px;
  color: var(--c-text);
  line-height: 1.7;
}
.tier-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--c-accent);
  transform: rotate(45deg);
}
.value-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.value-grid span {
  display: flex;
  flex-direction: column;
  font-size: 13px;
  color: var(--c-text-muted);
  background: var(--c-bg-tint);
  padding: 12px 14px;
  border-radius: var(--r-md);
}
.value-grid strong {
  font-size: 13px;
  color: var(--c-primary);
  margin-bottom: 2px;
  font-weight: 600;
}

.tier-cta {
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px dashed var(--c-border);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tier-cta .btn { flex: 1; min-width: 160px; }

/* 简化版 footer（仅版权 + 备案） */
.site-footer-min {
  background: #060c1f;
  color: rgba(243, 237, 226, .55);
  padding: 24px 0;
  font-size: 13px;
}
.footer-mini {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 8px 12px;
  text-align: center;
}
.footer-mini a {
  color: rgba(243, 237, 226, .7);
  transition: color .15s ease;
}
.footer-mini a:hover { color: white; }
.footer-sep { opacity: .35; }

/* ===== Lead form ===== */
.lead-form {
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--r-xl);
  padding: 40px;
  max-width: 920px;
  margin: 0 auto;
  box-shadow: 0 8px 32px -16px rgba(15, 23, 42, .15);
}
.lead-form-dark {
  background: rgba(255, 255, 255, .05);
  border-color: rgba(255, 255, 255, .15);
  color: white;
  box-shadow: none;
}
.lead-form .form-head {
  text-align: center;
  margin-bottom: 28px;
}
.lead-form .form-head h3 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 600;
}
.lead-form .form-head p {
  margin: 0;
  font-size: 14px;
  color: var(--c-text-muted);
}
.lead-form-dark .form-head p { color: rgba(255, 255, 255, .65); }

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}
.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-text);
}
.lead-form-dark .form-grid label { color: rgba(255, 255, 255, .85); }
.form-grid label em {
  color: #ef4444;
  font-style: normal;
  font-weight: 700;
}
.form-grid input,
.form-grid select {
  height: 44px;
  padding: 0 14px;
  font-size: 14px;
  font-family: inherit;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  background: white;
  color: var(--c-text);
  transition: border-color .15s ease, box-shadow .15s ease;
}
.lead-form-dark .form-grid input,
.lead-form-dark .form-grid select {
  background: rgba(255, 255, 255, .08);
  border-color: rgba(255, 255, 255, .2);
  color: white;
}
.lead-form-dark .form-grid input::placeholder { color: rgba(255, 255, 255, .4); }
.form-grid input:focus,
.form-grid select:focus {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(30, 95, 217, .15);
}
.form-bottom {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
  padding-top: 20px;
  border-top: 1px dashed var(--c-border);
}
.lead-form-dark .form-bottom { border-top-color: rgba(255, 255, 255, .12); }
.form-hot {
  margin: 0;
  font-size: 14px;
  color: var(--c-text-muted);
}
.lead-form-dark .form-hot { color: rgba(255, 255, 255, .7); }
.form-hot strong {
  color: var(--c-primary);
  font-size: 17px;
  letter-spacing: 1px;
  margin-left: 4px;
}
.lead-form-dark .form-hot strong { color: var(--c-accent); }
.form-msg {
  grid-column: 1 / -1;
  font-size: 14px;
  min-height: 20px;
  text-align: center;
}
.form-msg[data-kind="ok"] { color: #16a34a; }
.form-msg[data-kind="err"] { color: #dc2626; }
.lead-form-dark .form-msg[data-kind="ok"] { color: #4ade80; }
.lead-form-dark .form-msg[data-kind="err"] { color: #fca5a5; }
.form-promise {
  text-align: center;
  margin: 24px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--c-border);
  font-size: 13px;
  color: var(--c-text-muted);
}
.form-promise strong { color: var(--c-primary); }

/* ===== Pilot Alliance ===== */
.alliance-flow {
  margin-bottom: 48px;
}
.alliance-flow ol {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}
.alliance-flow li {
  position: relative;
  padding: 28px 20px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--r-lg);
  text-align: center;
}
.alliance-flow li span {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--c-accent);
  color: white;
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 14px;
}
.alliance-flow strong {
  display: block;
  font-size: 16px;
  margin-bottom: 6px;
  color: white;
  font-weight: 600;
}
.alliance-flow em {
  font-style: normal;
  font-size: 13px;
  color: rgba(255, 255, 255, .65);
  line-height: 1.6;
}
.alliance-points {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 48px;
}
.alliance-points article {
  padding: 24px;
  text-align: center;
  background: linear-gradient(160deg, rgba(59, 130, 246, .15) 0%, rgba(14, 165, 233, .08) 100%);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--r-lg);
}
.alliance-points h4 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: .5px;
  color: white;
  line-height: 1.5;
}
.alliance-benefits {
  max-width: 720px;
  margin: 0 auto 48px;
  text-align: center;
}
.alliance-benefits h3 {
  margin: 0 0 18px;
  font-size: 20px;
  font-weight: 600;
}
.alliance-benefits ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 24px;
}
.alliance-benefits li {
  font-size: 14px;
  color: rgba(255, 255, 255, .82);
  padding: 6px 0 6px 24px;
  position: relative;
  text-align: left;
}
.alliance-benefits li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 6px;
  color: var(--c-accent);
  font-weight: 700;
}

/* ===== About blocks (替换内容) ===== */
.about-lede {
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-text-muted);
  padding: 16px 20px;
  background: var(--c-bg-tint);
  border-radius: var(--r-md);
  border-left: 3px solid var(--c-primary);
  margin: 0 0 32px;
}
.about-lede strong { color: var(--c-text); }
.about-blocks {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
.about-blocks > div {
  padding: 0 0 0 16px;
  border-left: 2px solid var(--c-accent);
}
.about-blocks h4 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
}
.about-blocks p {
  margin: 0;
  font-size: 14px;
  color: var(--c-text-muted);
  line-height: 1.7;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}
.contact-card {
  background: white;
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: 32px 24px;
  text-align: center;
  transition: transform .15s ease, box-shadow .15s ease;
}
.contact-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}
.contact-icon {
  font-size: 28px;
  margin-bottom: 12px;
}
.contact-card h4 {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--c-text-muted);
  margin: 0 0 14px;
  text-transform: uppercase;
}
.contact-strong {
  font-size: 18px;
  font-weight: 600;
  color: var(--c-primary);
  margin: 0 0 6px;
  letter-spacing: 1px;
}
.contact-sub {
  font-size: 12px;
  color: var(--c-text-muted);
  margin: 0;
}
.qr-mini {
  width: 100px;
  height: 100px;
  margin: 0 auto 6px;
  display: grid;
  place-items: center;
  border: 1px dashed var(--c-border);
  border-radius: 8px;
  font-size: 11px;
  color: var(--c-text-muted);
  text-align: center;
  line-height: 1.5;
}

/* ===== Responsive：新段补充 ===== */
@media (max-width: 960px) {
  .join-window { grid-template-columns: 1fr; gap: 14px; }
  .tier-grid { grid-template-columns: 1fr; }
  .tier-card { padding: 28px 24px; }
  .alliance-flow ol { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .alliance-points { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .alliance-benefits ul { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .form-grid { grid-template-columns: 1fr; }
  .lead-form { padding: 28px 22px; }
  .form-bottom { flex-direction: column; align-items: stretch; }
  .form-bottom .btn { width: 100%; }
  .about-blocks { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .alliance-flow ol { grid-template-columns: 1fr; }
  .alliance-points { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: 1fr; }
}