:root {
  --weikan-bg: #f6f8fb;
  --weikan-ink: #121826;
  --weikan-muted: #5d6b7f;
  --weikan-line: #dce4ee;
  --weikan-panel: #ffffff;
  --weikan-navy: #0b1220;
  --weikan-cyan: #15b8d9;
  --weikan-cyan-dark: #0e7490;
  --weikan-shadow: 0 18px 50px rgba(15, 23, 42, 0.12);
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

.weikan-page {
  min-height: 100vh;
  background: var(--weikan-bg);
  color: var(--weikan-ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

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

.weikan-page a {
  color: inherit;
  text-decoration: none;
}

.weikan-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 68px;
  padding: 0 clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid var(--weikan-line);
  backdrop-filter: blur(14px);
}

.weikan-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 760;
  white-space: nowrap;
}

.weikan-brand-mark {
  display: block;
  width: 32px;
  height: 32px;
}

.weikan-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: #435167;
  font-size: 14px;
}

.weikan-nav a:hover {
  color: var(--weikan-ink);
}

.weikan-header-cta,
.weikan-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.weikan-page .weikan-header-cta {
  background: var(--weikan-navy);
  color: #fff;
}

.weikan-hero {
  background: radial-gradient(circle at 70% 15%, rgba(21, 184, 217, 0.18), transparent 30%), linear-gradient(135deg, #07101f 0%, #111827 62%, #0b1220 100%);
  color: #fff;
}

.weikan-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.15fr);
  align-items: center;
  gap: clamp(28px, 5vw, 72px);
  min-height: min(620px, calc(86vh - 68px));
  padding: clamp(34px, 5vw, 66px) clamp(20px, 5vw, 72px) clamp(32px, 4vw, 52px);
}

.weikan-hero-copy {
  max-width: 650px;
}

.weikan-hero h1 {
  margin: 0;
  max-width: 650px;
  font-size: clamp(40px, 5.4vw, 74px);
  line-height: 1.05;
  letter-spacing: 0;
}

.weikan-hero-lead {
  margin: 24px 0 0;
  max-width: 620px;
  color: #d1d8e5;
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.75;
}

.weikan-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.weikan-button.weikan-primary {
  background: var(--weikan-cyan);
  color: #06131c;
  box-shadow: 0 12px 32px rgba(21, 184, 217, 0.28);
}

.weikan-button.weikan-ghost {
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: #ecf7fb;
}

.weikan-button.weikan-wide {
  width: 100%;
}

.weikan-hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 42px 0 0;
}

.weikan-hero-points div {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.weikan-hero-points dt {
  font-weight: 760;
}

.weikan-hero-points dd {
  margin: 4px 0 0;
  color: #aab7c8;
  font-size: 13px;
}

.weikan-hero-visual {
  margin: 0;
}

.weikan-hero-visual img {
  display: block;
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.38);
}

.weikan-section {
  padding: clamp(64px, 8vw, 108px) clamp(20px, 5vw, 72px);
}

.weikan-section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.weikan-section-heading h2,
.weikan-materials-panel h2,
.weikan-contact h2,
.weikan-policy h2 {
  margin: 0;
  color: var(--weikan-ink);
  font-size: clamp(28px, 3vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

.weikan-section-heading p,
.weikan-materials-panel p,
.weikan-contact p,
.weikan-policy p {
  margin: 14px 0 0;
  color: var(--weikan-muted);
  font-size: 16px;
}

.weikan-intro,
.weikan-workflow,
.weikan-materials,
.weikan-policy {
  background: #fff;
}

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

.weikan-intro-grid article,
.weikan-feature-card,
.weikan-compliance-grid article {
  border: 1px solid var(--weikan-line);
  border-radius: 8px;
  background: var(--weikan-panel);
  padding: 24px;
}

.weikan-intro-grid h3,
.weikan-feature-card h3,
.weikan-compliance-grid h3,
.weikan-timeline h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.3;
}

.weikan-intro-grid p,
.weikan-feature-card p,
.weikan-compliance-grid p,
.weikan-timeline p {
  margin: 10px 0 0;
  color: var(--weikan-muted);
}

.weikan-number {
  display: block;
  margin-bottom: 18px;
  color: var(--weikan-cyan-dark);
  font-weight: 780;
}

.weikan-feature-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.weikan-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 18px;
  border-radius: 8px;
  background: #e6fbff;
  color: var(--weikan-cyan-dark);
  font-weight: 780;
}

.weikan-timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.weikan-timeline li {
  padding: 24px;
  border: 1px solid var(--weikan-line);
  border-radius: 8px;
  background: #f8fafc;
}

.weikan-timeline span {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 20px;
  border-radius: 8px;
  background: var(--weikan-navy);
  color: #fff;
  font-weight: 780;
}

.weikan-compliance {
  background: linear-gradient(180deg, #f6f8fb 0%, #eef4f8 100%);
}

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

.weikan-materials-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1fr);
  gap: 32px;
  align-items: start;
  padding: clamp(28px, 5vw, 46px);
  border-radius: 8px;
  background: var(--weikan-navy);
  color: #fff;
  box-shadow: var(--weikan-shadow);
}

.weikan-materials-panel h2 {
  color: #fff;
}

.weikan-materials-panel p {
  color: #c9d4e1;
}

.weikan-materials-panel ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.weikan-materials-panel li {
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  color: #e6edf5;
}

.weikan-materials-panel li:last-child {
  border-bottom: 0;
}

.weikan-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
  gap: 32px;
  align-items: center;
  background: #eef4f8;
}

.weikan-contact-card {
  padding: 24px;
  border: 1px solid var(--weikan-line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--weikan-shadow);
}

.weikan-contact-card p {
  margin: 14px 0 0;
  color: var(--weikan-muted);
}

.weikan-contact-card .weikan-note {
  color: #8a5a00;
  font-size: 13px;
}

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

.weikan-policy article {
  padding: 24px 0;
  border-top: 1px solid var(--weikan-line);
}

.weikan-policy h2 {
  font-size: 22px;
}

.weikan-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(20px, 5vw, 72px);
  background: var(--weikan-navy);
  color: #aeb8c7;
  font-size: 14px;
}

@media (max-width: 1080px) {
  .weikan-hero-inner {
    grid-template-columns: 1fr;
  }

  .weikan-hero-copy {
    max-width: 780px;
  }

  .weikan-hero-visual {
    max-width: 860px;
  }

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

@media (max-width: 760px) {
  .weikan-header {
    position: static;
    flex-wrap: wrap;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .weikan-nav {
    order: 3;
    width: 100%;
    gap: 14px;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .weikan-header-cta {
    min-height: 38px;
  }

  .weikan-hero-inner {
    min-height: auto;
    padding-top: 30px;
    padding-bottom: 28px;
  }

  .weikan-hero h1 {
    font-size: 34px;
    line-height: 1.12;
  }

  .weikan-hero-lead {
    margin-top: 18px;
  }

  .weikan-hero-actions {
    margin-top: 22px;
  }

  .weikan-hero-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 24px;
    gap: 8px;
  }

  .weikan-hero-points div {
    padding: 12px 10px;
  }

  .weikan-hero-points dt {
    font-size: 14px;
  }

  .weikan-hero-points dd {
    font-size: 12px;
  }

  .weikan-hero-visual img {
    max-height: 145px;
    object-fit: cover;
    object-position: center;
  }

  .weikan-intro-grid,
  .weikan-feature-grid,
  .weikan-timeline,
  .weikan-compliance-grid,
  .weikan-materials-panel,
  .weikan-contact,
  .weikan-policy {
    grid-template-columns: 1fr;
  }

  .weikan-section {
    padding-top: 56px;
    padding-bottom: 56px;
  }

  .weikan-footer {
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .weikan-hero-actions {
    flex-direction: row;
  }

  .weikan-hero-actions .weikan-button {
    flex: 1 1 0;
    padding-right: 10px;
    padding-left: 10px;
  }

  .weikan-hero h1 {
    font-size: 32px;
  }
}