:root {
  --bg: #f4f7fb;
  --surface: rgba(255, 255, 255, 0.9);
  --surface-strong: #ffffff;
  --surface-soft: #f7faff;
  --text: #182032;
  --text-secondary: #59647d;
  --text-muted: #8891a6;
  --border: rgba(28, 41, 79, 0.1);
  --accent: #315efb;
  --accent-soft: rgba(49, 94, 251, 0.1);
  --accent-strong: #1f46d8;
  --success: #2f9d67;
  --warning: #d88914;
  --wechat: #22a568;
  --violet: #7049f6;
  --violet-soft: rgba(112, 73, 246, 0.1);
  --gold: #f5bb47;
  --shadow-sm: 0 10px 25px rgba(16, 28, 56, 0.06);
  --shadow-md: 0 22px 60px rgba(18, 32, 65, 0.1);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(49, 94, 251, 0.12), transparent 30%),
    radial-gradient(circle at right bottom, rgba(47, 157, 103, 0.1), transparent 24%),
    linear-gradient(180deg, #f7f9fd 0%, #edf2f8 100%);
}

a {
  color: var(--accent);
}

code {
  padding: 2px 6px;
  border-radius: 8px;
  font-family: "Cascadia Code", Consolas, monospace;
  background: #eef3ff;
  color: #2147cf;
  word-break: break-all;
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 26px 0 48px;
}

.hero,
.quick-panel,
.support-strip,
.step-card,
.summary-card,
.faq-section,
.product-showcase,
.page-footer {
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(14px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
  gap: 20px;
  border-radius: 34px;
  padding: 34px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.eyebrow.accent {
  background: rgba(245, 187, 71, 0.18);
  color: #9b6900;
}

.hero h1 {
  margin: 14px 0 12px;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.08;
}

.hero p {
  margin: 0;
  max-width: 700px;
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.9;
}

.hero-side {
  display: grid;
  gap: 14px;
}

.stat-card {
  display: grid;
  gap: 8px;
  padding: 20px;
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.94), rgba(243, 247, 255, 0.92));
  border: 1px solid rgba(49, 94, 251, 0.12);
}

.stat-card strong {
  display: block;
  font-size: 18px;
}

.stat-card span {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 14px;
}

.contact-card {
  background:
    radial-gradient(circle at top right, rgba(245, 187, 71, 0.18), transparent 36%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(250, 246, 235, 0.96));
  border-color: rgba(245, 187, 71, 0.28);
}

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

.hero-actions .btn {
  flex-shrink: 0;
}

.btn {
  border: 0;
  border-radius: 999px;
  padding: 13px 20px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  text-decoration: none;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  box-shadow: 0 14px 28px rgba(49, 94, 251, 0.18);
}

.btn-secondary {
  color: var(--text);
  background: #fff;
  border: 1px solid var(--border);
}

.btn-ghost,
.btn-mini {
  color: var(--accent);
  background: var(--accent-soft);
}

.btn-mini {
  padding: 10px 16px;
  font-size: 13px;
}

.quick-panel,
.support-strip,
.summary-card,
.faq-section,
.product-showcase {
  border-radius: var(--radius-lg);
  padding: 26px;
}

.quick-panel {
  margin-top: 18px;
}

.panel-title-row,
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.section-head-stack {
  align-items: flex-start;
}

.panel-title-row h2,
.section-head h2 {
  margin: 0;
  font-size: 24px;
}

.section-head p {
  margin: 10px 0 0;
  color: var(--text-secondary);
}

.link-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.link-card {
  padding: 18px;
  text-align: left;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #ffffff, #f7faff);
  cursor: pointer;
}

.link-card strong {
  display: block;
  margin-bottom: 6px;
  font-size: 16px;
}

.link-card span {
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 13px;
  word-break: break-all;
}

.tip-line {
  margin: 14px 2px 0;
  color: var(--text-muted);
  font-size: 13px;
}

.support-strip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
  gap: 20px;
  margin-top: 18px;
  background:
    radial-gradient(circle at top left, rgba(245, 187, 71, 0.18), transparent 32%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(250, 252, 255, 0.95));
}

.support-copy h2 {
  margin: 14px 0 10px;
  font-size: 28px;
}

.support-copy p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.9;
}

.support-points {
  display: grid;
  gap: 12px;
}

.support-pill {
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(28, 41, 79, 0.08);
  font-weight: 700;
  color: var(--text);
}

.section-nav {
  position: sticky;
  top: 12px;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0;
  padding: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(28, 41, 79, 0.08);
  backdrop-filter: blur(12px);
}

.section-nav::-webkit-scrollbar {
  display: none;
}

.section-nav a {
  flex-shrink: 0;
  padding: 9px 14px;
  border-radius: 999px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

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

.content-stack {
  display: grid;
  gap: 18px;
}

.step-card {
  display: grid;
  grid-template-columns: minmax(320px, 0.95fr) minmax(0, 1.05fr);
  gap: 24px;
  align-items: center;
  border-radius: 30px;
  padding: 26px;
}

.step-card.reverse {
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
}

.step-card.reverse .step-visual {
  order: 2;
}

.step-card.reverse .step-copy {
  order: 1;
}

.step-visual img {
  display: block;
  width: 100%;
  border-radius: 24px;
  box-shadow: var(--shadow-md);
  background: #fff;
}

.info-panel,
.speed-panel {
  display: grid;
  gap: 14px;
  padding: 28px;
  border-radius: 26px;
  min-height: 100%;
  box-shadow: var(--shadow-md);
}

.info-panel {
  background:
    radial-gradient(circle at top right, rgba(49, 94, 251, 0.12), transparent 28%),
    linear-gradient(180deg, #ffffff, #f3f7ff);
}

.speed-panel {
  background:
    radial-gradient(circle at top left, rgba(112, 73, 246, 0.16), transparent 30%),
    linear-gradient(180deg, #ffffff, #f5f1ff);
}

.info-chip,
.speed-badge {
  display: inline-flex;
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.05em;
}

.info-chip {
  color: var(--accent);
  background: var(--accent-soft);
}

.speed-badge {
  color: var(--violet);
  background: var(--violet-soft);
}

.info-panel h3,
.speed-panel h3 {
  margin: 0;
  font-size: 28px;
}

.info-panel p,
.speed-panel p,
.speed-panel li {
  color: var(--text-secondary);
  line-height: 1.8;
}

.speed-panel ul {
  margin: 0;
  padding-left: 20px;
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.badge.success {
  color: var(--success);
  background: rgba(47, 157, 103, 0.12);
}

.badge.warn {
  color: var(--warning);
  background: rgba(216, 137, 20, 0.12);
}

.badge.wechat {
  color: var(--wechat);
  background: rgba(34, 165, 104, 0.12);
}

.badge.violet {
  color: var(--violet);
  background: var(--violet-soft);
}

.accent-badge {
  color: #886100;
  background: rgba(245, 187, 71, 0.18);
}

.step-copy h2 {
  margin: 14px 0 12px;
  font-size: 30px;
}

.step-copy p,
.step-copy li {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.9;
}

.step-copy ol {
  padding-left: 20px;
  margin: 0;
}

.callout {
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: 20px;
  background: linear-gradient(180deg, #f9fbff, #f2f6ff);
  border: 1px solid rgba(49, 94, 251, 0.12);
  color: var(--text-secondary);
  line-height: 1.8;
}

.code-block {
  margin: 14px 0 0;
  padding: 18px 20px;
  overflow-x: auto;
  border-radius: 20px;
  border: 1px solid rgba(28, 41, 79, 0.08);
  background: linear-gradient(180deg, #101826, #172338);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.code-block code {
  display: block;
  padding: 0;
  color: #dce7ff;
  background: transparent;
  white-space: pre;
}

.product-showcase {
  background:
    radial-gradient(circle at top left, rgba(245, 187, 71, 0.16), transparent 28%),
    radial-gradient(circle at bottom right, rgba(49, 94, 251, 0.08), transparent 22%),
    rgba(255, 255, 255, 0.92);
}

.seller-card {
  display: grid;
  gap: 8px;
  min-width: 270px;
  max-width: 100%;
  padding: 16px 18px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(250, 246, 235, 0.96));
  border: 1px solid rgba(245, 187, 71, 0.25);
  color: var(--text-secondary);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.product-card {
  display: grid;
  gap: 14px;
  padding: 22px;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(28, 41, 79, 0.08);
  box-shadow: 0 18px 40px rgba(16, 28, 56, 0.05);
}

.product-card.featured {
  background:
    radial-gradient(circle at top right, rgba(245, 187, 71, 0.2), transparent 28%),
    linear-gradient(180deg, #ffffff, #fff9ee);
  border-color: rgba(245, 187, 71, 0.28);
}

.product-card h3 {
  margin: 0;
  font-size: 28px;
}

.product-card p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.85;
}

.product-topline,
.product-points {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.product-tag,
.product-points span {
  display: inline-flex;
  align-items: center;
  padding: 7px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}

.product-tag {
  color: #8a5c00;
  background: rgba(245, 187, 71, 0.18);
}

.product-tag.muted {
  color: var(--text-secondary);
  background: rgba(28, 41, 79, 0.06);
}

.product-points span {
  color: var(--accent);
  background: var(--accent-soft);
}

.pros-cons {
  display: grid;
  gap: 12px;
}

.pros-cons strong {
  display: block;
  margin-bottom: 6px;
  font-size: 15px;
}

.summary-card h2 {
  margin: 0 0 14px;
  font-size: 26px;
}

.quote-box {
  padding: 18px 20px;
  border-radius: 20px;
  background: #f8faff;
  border: 1px dashed rgba(49, 94, 251, 0.28);
  color: var(--text-secondary);
  line-height: 1.9;
}

.faq-section {
  padding-top: 24px;
}

.faq-item {
  margin-top: 12px;
  overflow: hidden;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: #fff;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 20px;
  font-weight: 700;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item[open] summary {
  color: var(--accent);
  background: var(--accent-soft);
}

.faq-body {
  padding: 0 20px 18px;
  color: var(--text-secondary);
  line-height: 1.85;
}

.page-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 16px;
  margin-top: 18px;
  padding: 18px 22px;
  border-radius: 22px;
  color: var(--text-secondary);
  font-size: 14px;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  max-width: min(360px, calc(100vw - 32px));
  padding: 14px 18px;
  border-radius: 18px;
  color: #fff;
  background: rgba(24, 32, 50, 0.92);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .link-grid,
  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero,
  .support-strip,
  .step-card,
  .step-card.reverse {
    gap: 20px;
  }
}

@media (max-width: 1024px) {
  .hero,
  .support-strip,
  .step-card,
  .step-card.reverse {
    grid-template-columns: 1fr;
  }

  .step-card.reverse .step-visual,
  .step-card.reverse .step-copy {
    order: initial;
  }

  .section-nav {
    border-radius: 24px;
  }

  .seller-card {
    min-width: 0;
    width: 100%;
  }
}

@media (max-width: 840px) {
  .section-nav {
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 12px;
    scroll-snap-type: x proximity;
  }

  .section-nav a {
    scroll-snap-align: start;
  }

  .panel-title-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .panel-title-row .btn-mini {
    align-self: flex-start;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100%, calc(100% - 20px));
    padding-top: 18px;
  }

  .hero,
  .quick-panel,
  .support-strip,
  .step-card,
  .summary-card,
  .faq-section,
  .product-showcase {
    padding: 20px;
  }

  .hero h1,
  .step-copy h2,
  .product-card h3 {
    font-size: 26px;
  }

  .hero p,
  .step-copy p,
  .step-copy li,
  .product-card p,
  .quote-box,
  .faq-body {
    font-size: 14px;
    line-height: 1.8;
  }

  .panel-title-row,
  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
    text-align: center;
  }

  .link-grid,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .section-nav {
    gap: 8px;
    padding: 10px;
  }

  .section-nav a {
    font-size: 13px;
    padding: 8px 12px;
  }

  .code-block {
    padding: 16px;
    border-radius: 18px;
  }

  .code-block code {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    word-break: break-word;
    font-size: 12px;
    line-height: 1.7;
  }

  .seller-card,
  .support-pill,
  .stat-card,
  .product-card,
  .link-card {
    border-radius: 18px;
  }

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

@media (max-width: 560px) {
  .page-shell {
    width: min(100%, calc(100% - 14px));
  }

  .hero,
  .quick-panel,
  .support-strip,
  .step-card,
  .summary-card,
  .faq-section,
  .product-showcase,
  .page-footer {
    padding: 16px;
    border-radius: 20px;
  }

  .hero h1 {
    font-size: 30px;
    line-height: 1.12;
  }

  .support-copy h2,
  .panel-title-row h2,
  .section-head h2,
  .summary-card h2 {
    font-size: 22px;
  }

  .step-copy h2,
  .product-card h3,
  .info-panel h3,
  .speed-panel h3 {
    font-size: 24px;
  }

  .hero-actions,
  .product-topline,
  .product-points {
    gap: 10px;
  }

  .quote-box,
  .callout,
  .faq-item summary,
  .faq-body {
    padding-left: 16px;
    padding-right: 16px;
  }

  .toast {
    right: 10px;
    left: 10px;
    bottom: 10px;
    max-width: none;
  }
}