:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --navy: #1e3a5f;
  --navy-deep: #132a47;
  --accent: #f59e0b;
  --background: #f8fafc;
  --surface: #ffffff;
  --surface-blue: #eff6ff;
  --text: #24364b;
  --muted: #64748b;
  --line: #dbe5f0;
  --shadow: 0 18px 50px rgba(30, 58, 95, 0.1);
  --shadow-soft: 0 10px 30px rgba(30, 58, 95, 0.07);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1180px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--text);
  background: var(--background);
  font-family: "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid rgba(245, 158, 11, 0.85);
  outline-offset: 3px;
}

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

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(219, 229, 240, 0.85);
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
}

.header-inner {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: flex;
  min-height: 52px;
  align-items: center;
}

.brand img {
  width: 196px;
  max-height: 58px;
  object-fit: contain;
  object-position: left center;
}

.site-menu {
  display: flex;
  align-items: center;
  gap: 5px;
}

.site-menu[hidden] {
  display: flex;
}

.site-menu a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 8px 13px;
  color: #41566d;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition: color 160ms ease, background-color 160ms ease;
}

.site-menu a:hover {
  color: var(--primary);
  background: var(--surface-blue);
}

.menu-toggle {
  display: none;
  min-width: 48px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--navy);
  background: var(--surface-blue);
  border: 1px solid #cfe0f5;
  border-radius: 12px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.menu-toggle > span:first-child,
.menu-toggle > span:first-child::before,
.menu-toggle > span:first-child::after {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  content: "";
}

.menu-toggle > span:first-child {
  position: relative;
}

.menu-toggle > span:first-child::before {
  position: absolute;
  top: -6px;
}

.menu-toggle > span:first-child::after {
  position: absolute;
  top: 6px;
}

.hero-shell {
  position: relative;
  overflow: hidden;
  padding: 76px 0 82px;
  background:
    radial-gradient(circle at 80% 18%, rgba(37, 99, 235, 0.14), transparent 28%),
    linear-gradient(135deg, #f7fbff 0%, #eff6ff 52%, #f8fafc 100%);
}

.hero-shell::before,
.hero-shell::after {
  position: absolute;
  border-radius: 999px;
  content: "";
}

.hero-shell::before {
  top: -100px;
  right: -120px;
  width: 320px;
  height: 320px;
  border: 56px solid rgba(37, 99, 235, 0.05);
}

.hero-shell::after {
  bottom: -130px;
  left: 26%;
  width: 250px;
  height: 250px;
  background: rgba(245, 158, 11, 0.05);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(310px, 0.82fr) minmax(0, 1.35fr);
  align-items: center;
  gap: clamp(48px, 7vw, 92px);
}

.entry-card {
  position: relative;
  padding: 34px;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(145deg, var(--navy-deep), var(--navy));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 70px rgba(30, 58, 95, 0.22);
}

.entry-card::after {
  position: absolute;
  right: -55px;
  bottom: -70px;
  width: 180px;
  height: 180px;
  border: 30px solid rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  content: "";
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.eyebrow::before {
  width: 22px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
  content: "";
}

.entry-card .eyebrow,
.closing-card .eyebrow {
  color: #bfdbfe;
}

.entry-card h2 {
  margin: 12px 0 12px;
  color: #fff;
  font-size: clamp(25px, 2.2vw, 32px);
  line-height: 1.35;
}

.entry-card > p {
  margin: 0;
  color: #d8e7f7;
}

.entry-actions,
.closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 12px;
  font-weight: 800;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: var(--primary);
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.25);
}

.button-primary:hover {
  background: var(--primary-dark);
}

.entry-card .button-primary {
  color: var(--navy-deep);
  background: #fff;
  box-shadow: none;
}

.button-quiet {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.06);
}

.button-light {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.08);
}

.entry-points {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 10px;
  margin: 28px 0 0;
  padding: 24px 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  list-style: none;
}

.entry-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #e8f2fc;
  font-size: 14px;
}

.entry-points li::before {
  width: 8px;
  height: 8px;
  flex: 0 0 8px;
  background: var(--accent);
  border-radius: 50%;
  content: "";
}

.hero-kicker {
  margin: 0 0 14px;
  color: var(--primary);
  font-weight: 800;
  letter-spacing: 0.08em;
}

.hero-copy h1 {
  max-width: 760px;
  margin: 0;
  color: var(--navy-deep);
  font-size: clamp(38px, 4.8vw, 62px);
  line-height: 1.16;
  letter-spacing: -0.035em;
}

.hero-lead {
  max-width: 720px;
  margin: 24px 0 0;
  color: #52677e;
  font-size: 18px;
  line-height: 1.85;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 25px;
}

.hero-tags span {
  padding: 7px 13px;
  color: #315272;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid #d6e5f6;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
}

.hero-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  max-width: 690px;
  margin-top: 28px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.75);
  border-left: 4px solid var(--accent);
  border-radius: 0 14px 14px 0;
}

.hero-note strong {
  color: var(--navy);
  white-space: nowrap;
}

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

.section {
  padding: 92px 0;
}

.section-heading {
  margin-bottom: 42px;
}

.section-heading h2 {
  margin: 10px 0 0;
  color: var(--navy-deep);
  font-size: clamp(30px, 3.6vw, 44px);
  line-height: 1.25;
}

.section-heading p {
  max-width: 720px;
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 16px;
}

.heading-row {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  align-items: end;
  gap: 60px;
}

.heading-row p {
  margin: 0;
}

.centered {
  max-width: 760px;
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.centered .eyebrow {
  justify-content: center;
}

.centered p {
  margin-right: auto;
  margin-left: auto;
}

.gifts-section {
  background: #fff;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 16px;
}

.product-card {
  min-width: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 15px rgba(30, 58, 95, 0.04);
  transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: #b9d3f0;
  box-shadow: var(--shadow-soft);
}

.product-link {
  display: flex;
  height: 100%;
  min-height: 100%;
  flex-direction: column;
}

.product-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: contain;
  padding: 10px;
  background: #fff;
}

.product-info {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: 14px 14px 16px;
  border-top: 1px solid #edf2f7;
}

.product-card h3 {
  overflow: hidden;
  margin: 0;
  color: var(--navy-deep);
  font-size: 15px;
  line-height: 1.45;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.product-card p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.product-price {
  display: block;
  margin-top: 12px;
  padding-top: 10px;
  color: #c45c05;
  border-top: 1px dashed #e7d6bd;
  font-size: 14px;
  font-weight: 900;
  line-height: 1.35;
}

.more-products-card {
  display: flex;
  min-height: 100%;
  grid-column: span 3;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
  padding: 32px;
  color: #fff;
  text-align: center;
  background: linear-gradient(145deg, var(--primary-dark), var(--navy));
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.more-products-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 18px 36px rgba(30, 58, 95, 0.2);
}

.more-products-icon {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  color: var(--navy-deep);
  background: var(--accent);
  border-radius: 50%;
  font-size: 25px;
  font-weight: 900;
}

.more-products-card strong {
  font-size: 22px;
}

.more-products-card > span:last-child {
  color: #d9e8f8;
  font-size: 14px;
}

.scenarios-section {
  background: var(--background);
}

.scenario-grid,
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.info-card {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft);
}

.card-index {
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  color: var(--primary);
  background: var(--surface-blue);
  border: 1px solid #cfe0f5;
  border-radius: 15px;
  font-size: 20px;
  font-weight: 900;
}

.info-card h3 {
  margin: 20px 0 8px;
  color: var(--navy-deep);
  font-size: 21px;
}

.info-card p,
.advantage-grid p {
  margin: 0;
  color: var(--muted);
}

.process-section {
  color: #fff;
  background: var(--navy-deep);
}

.process-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: 74px;
}

.process-copy {
  position: sticky;
  top: 118px;
  align-self: start;
  margin: 0;
}

.process-copy h2 {
  color: #fff;
}

.process-copy p {
  color: #c2d3e5;
}

.process-callout {
  margin-top: 32px;
  padding: 22px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
}

.process-callout strong {
  color: #fff;
}

.process-callout p {
  margin: 7px 0 0;
  font-size: 14px;
}

.process-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.process-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: var(--radius-md);
}

.process-list li > span {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  color: var(--navy-deep);
  background: var(--accent);
  border-radius: 16px;
  font-weight: 900;
}

.process-list h3 {
  margin: 0 0 5px;
  color: #fff;
  font-size: 19px;
}

.process-list p {
  margin: 0;
  color: #c2d3e5;
}

.advantages-section {
  background: #fff;
}

.advantage-grid article {
  padding: 28px 25px;
  background: linear-gradient(180deg, #fff, #f8fbff);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.advantage-grid article > span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: #fff;
  background: var(--primary);
  border-radius: 50%;
  font-weight: 900;
}

.advantage-grid h3 {
  margin: 18px 0 8px;
  color: var(--navy-deep);
  font-size: 20px;
}

.guide-section {
  background: var(--surface-blue);
}

.guide-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(300px, 0.7fr);
  gap: 28px;
}

.guide-panel,
.privacy-card {
  padding: clamp(28px, 4vw, 44px);
  background: #fff;
  border: 1px solid #d7e5f4;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-soft);
}

.guide-panel h2 {
  margin: 10px 0 26px;
  color: var(--navy-deep);
  font-size: clamp(28px, 3vw, 40px);
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 13px;
  padding: 17px;
  background: var(--background);
  border-radius: 14px;
}

.check-list li > span {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--primary);
  background: #dbeafe;
  border-radius: 10px;
  font-weight: 900;
}

.check-list strong {
  color: var(--navy-deep);
}

.check-list p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.privacy-card {
  color: #fff;
  background: linear-gradient(145deg, var(--primary-dark), var(--primary));
  border: 0;
}

.privacy-icon {
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  color: var(--navy-deep);
  background: var(--accent);
  border-radius: 18px;
  font-weight: 900;
}

.privacy-card h3 {
  margin: 24px 0 12px;
  font-size: 25px;
}

.privacy-card p {
  margin: 0;
  color: #e5efff;
}

.privacy-card .fine-print {
  margin-top: 24px;
  padding-top: 20px;
  color: #c7dcff;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  font-size: 13px;
}

.faq-section {
  background: #fff;
}

.faq-grid {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1.3fr);
  gap: 72px;
}

.faq-intro {
  position: sticky;
  top: 118px;
  align-self: start;
  margin: 0;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list details {
  padding: 0 22px;
  background: var(--background);
  border: 1px solid var(--line);
  border-radius: 15px;
}

.faq-list summary {
  position: relative;
  min-height: 60px;
  padding: 16px 38px 16px 0;
  color: var(--navy-deep);
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

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

.faq-list summary::after {
  position: absolute;
  top: 16px;
  right: 0;
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  color: var(--primary);
  background: #dbeafe;
  border-radius: 50%;
  content: "+";
}

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

.faq-list details p {
  margin: 0;
  padding: 0 34px 20px 0;
  color: var(--muted);
}

.closing-section {
  padding: 0 0 92px;
  background: #fff;
}

.closing-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: clamp(32px, 5vw, 56px);
  color: #fff;
  background: var(--navy-deep);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.closing-card h2 {
  margin: 10px 0 8px;
  font-size: clamp(27px, 3vw, 39px);
  line-height: 1.3;
}

.closing-card p {
  margin: 0;
  color: #c6d7e8;
}

.closing-actions {
  flex: 0 0 auto;
  margin: 0;
}

.site-footer {
  padding: 42px 0;
  color: #aebfd0;
  background: #0d2036;
}

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

.footer-brand img {
  width: 170px;
  max-height: 55px;
  object-fit: contain;
  object-position: left center;
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

.footer-brand p {
  margin: 10px 0 0;
  font-size: 14px;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 20px;
}

.site-footer nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: #d7e3ef;
}

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

.copyright {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  font-size: 13px;
}

.back-to-top {
  position: fixed;
  z-index: 50;
  right: 22px;
  bottom: 22px;
  display: grid;
  width: 48px;
  height: 48px;
  place-items: center;
  color: #fff;
  background: var(--primary);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.28);
  cursor: pointer;
  font-family: inherit;
  font-size: 22px;
  font-weight: 900;
}

.back-to-top[hidden] {
  display: none;
}

@media (max-width: 1099px) {
  .site-menu a {
    padding-inline: 9px;
    font-size: 14px;
  }

  .hero-grid {
    gap: 42px;
  }

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

  .scenario-grid,
  .advantage-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 899px) {
  .header-inner {
    position: relative;
    min-height: 70px;
  }

  .brand img {
    width: 174px;
    max-height: 52px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-menu,
  .site-menu[hidden] {
    position: absolute;
    top: calc(100% + 1px);
    right: 0;
    left: 0;
    display: grid;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 0 0 16px 16px;
    box-shadow: var(--shadow);
  }

  .site-menu[hidden] {
    display: none;
  }

  .site-menu a {
    padding-inline: 15px;
  }

  .hero-shell {
    padding: 54px 0 64px;
  }

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

  .entry-card {
    max-width: 620px;
  }

  .heading-row,
  .process-layout,
  .guide-grid,
  .faq-grid {
    grid-template-columns: 1fr;
    gap: 38px;
  }

  .process-copy,
  .faq-intro {
    position: static;
  }

  .closing-card {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 759px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .hero-grid {
    gap: 34px;
  }

  .entry-card {
    padding: 26px;
  }

  .hero-copy h1 {
    font-size: clamp(34px, 10.2vw, 46px);
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-note {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .section {
    padding: 70px 0;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  .product-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .product-info {
    padding: 12px 10px 14px;
  }

  .product-card h3 {
    font-size: 14px;
  }

  .more-products-card {
    min-height: 0;
    grid-column: span 1;
    padding: 20px 12px;
  }

  .more-products-card strong {
    font-size: 17px;
  }

  .more-products-card > span:last-child {
    font-size: 12px;
  }

  .scenario-grid,
  .advantage-grid,
  .check-list {
    grid-template-columns: 1fr;
  }

  .process-list li {
    grid-template-columns: 48px 1fr;
    gap: 14px;
    padding: 19px;
  }

  .process-list li > span {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    font-size: 13px;
  }

  .guide-panel,
  .privacy-card {
    padding: 25px;
  }

  .faq-list details {
    padding-inline: 17px;
  }

  .closing-section {
    padding-bottom: 70px;
  }

  .closing-card {
    padding: 28px;
    border-radius: 20px;
  }

  .closing-actions,
  .closing-actions .button {
    width: 100%;
  }

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

  .site-footer nav {
    justify-content: flex-start;
  }
}

@media (max-width: 420px) {
  .brand img {
    width: 154px;
  }

  .menu-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
  }

  .entry-actions .button {
    flex: 1 1 120px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}