:root {
  --ink: #101827;
  --muted: #667085;
  --line: #e6edf5;
  --soft: #f7fafc;
  --panel: #ffffff;
  --teal: #14b8a6;
  --indigo: #6366f1;
  --violet: #7c3aed;
  --orange: #f97316;
  --green: #16a34a;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.68;
  background:
    radial-gradient(circle at 12% 5%, rgba(20, 184, 166, 0.15), transparent 28rem),
    radial-gradient(circle at 88% 10%, rgba(99, 102, 241, 0.16), transparent 30rem),
    linear-gradient(180deg, #fbfdff 0%, #fff 42%, #f7fafc 100%);
}

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

.wrap {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 230px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  border-radius: 17px;
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--indigo));
  box-shadow: 0 18px 30px rgba(99, 102, 241, 0.25);
  font-weight: 900;
}

.brand-title {
  display: block;
  color: var(--indigo);
  font-size: 23px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
}

.brand-subtitle {
  display: block;
  margin-top: 5px;
  color: #98a1b2;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 15px;
  font-weight: 850;
  color: #4b5565;
}

.nav-links a {
  padding: 10px 12px;
  border-radius: 999px;
}

.nav-links a:hover,
.nav-links .active {
  color: var(--indigo);
  background: rgba(99, 102, 241, 0.09);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(310px, 0.9fr);
  gap: 44px;
  align-items: center;
  padding: 76px 0 52px;
}

.eyebrow {
  display: inline-flex;
  padding: 8px 14px;
  color: var(--indigo);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(99, 102, 241, 0.16);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 900;
}

h1 {
  margin: 20px 0 18px;
  max-width: 760px;
  font-size: clamp(38px, 6vw, 70px);
  line-height: 1.04;
  letter-spacing: -0.06em;
}

.lead {
  margin: 0 0 28px;
  max-width: 700px;
  color: #344054;
  font-size: clamp(17px, 2vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 22px;
  border-radius: 16px;
  font-weight: 900;
  transition: 0.2s ease;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--teal), var(--indigo));
  box-shadow: 0 18px 34px rgba(99, 102, 241, 0.18);
}

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

.product-card {
  padding: 28px;
  border: 1px solid rgba(99, 102, 241, 0.14);
  border-radius: 30px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.trust-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 24px;
}

.trust-item {
  position: relative;
  padding: 10px 0 10px 16px;
  border-left: 3px solid rgba(99, 102, 241, 0.34);
  background: transparent;
  color: #344054;
  font-size: 14px;
  font-weight: 800;
}

.trust-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 50%;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--teal), var(--indigo));
  transform: translateY(-50%);
}

.tag {
  display: inline-flex;
  padding: 6px 11px;
  border-radius: 999px;
  color: #fff;
  background: var(--orange);
  font-size: 12px;
  font-weight: 900;
}

.price {
  margin: 18px 0 8px;
  font-size: 48px;
  font-weight: 950;
  letter-spacing: -0.06em;
}

.price small {
  font-size: 16px;
  color: var(--muted);
  letter-spacing: 0;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 22px 0;
  display: grid;
  gap: 10px;
  color: #344054;
}

.check-list li::before {
  content: "✓";
  margin-right: 8px;
  color: var(--green);
  font-weight: 900;
}

.mini-note {
  margin-top: 14px;
  padding: 13px 14px;
  border-radius: 16px;
  color: #5b3b08;
  background: #fff7dc;
  font-size: 14px;
}

.section {
  padding: 62px 0;
}

.section-head {
  max-width: 760px;
  margin-bottom: 26px;
}

.section h2 {
  margin: 0 0 10px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.04em;
}

.section p {
  margin: 0;
  color: var(--muted);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.offer-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.offer-card {
  position: relative;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: #fff;
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.06);
}

.offer-card.featured {
  border-color: rgba(99, 102, 241, 0.35);
  box-shadow: 0 22px 48px rgba(99, 102, 241, 0.14);
}

.offer-card h3 {
  margin: 0 0 8px;
  font-size: 21px;
}

.offer-card .price {
  margin: 12px 0;
  font-size: 34px;
}

.pill {
  display: inline-flex;
  align-items: center;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.1);
  color: #0f766e;
  font-size: 12px;
  font-weight: 900;
}

.notice {
  padding: 22px;
  border: 1px solid rgba(249, 115, 22, 0.22);
  border-radius: 24px;
  background: #fff8f1;
}

.notice h3 {
  margin: 0 0 8px;
}

.notice p {
  color: #8a4b15;
}

.panel {
  padding: 23px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: 0 14px 34px rgba(15, 23, 42, 0.055);
}

.panel h3 {
  margin: 0 0 8px;
  font-size: 19px;
}

.panel .meta,
.article-card .meta,
.blog-card .meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.blog-card {
  display: flex;
  min-height: 250px;
  flex-direction: column;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: #fff;
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.06);
}

.blog-card h3 {
  margin: 0 0 10px;
  font-size: 21px;
  line-height: 1.25;
}

.blog-card p { margin: 0; }

.blog-card .btn {
  width: fit-content;
  margin-top: auto;
  padding: 11px 15px;
}

.summary-box {
  margin: 26px 0;
  padding: 22px;
  border: 1px solid rgba(20, 184, 166, 0.24);
  border-radius: 24px;
  background: #f0fdfa;
}

.summary-box h2,
.summary-box h3 {
  margin-top: 0;
}

.table-list {
  display: grid;
  gap: 12px;
  margin: 24px 0;
}

.table-list > div {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
}

.table-list strong {
  color: var(--ink);
}

.steps {
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.step {
  counter-increment: step;
  padding: 24px;
  border-radius: 24px;
  color: #fff;
  background: #101827;
}

.step::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  margin-bottom: 16px;
  color: #101827;
  background: #fff;
  border-radius: 999px;
  font-weight: 950;
}

.step h3 { margin: 0 0 8px; }
.step p { color: rgba(255, 255, 255, 0.74); }

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

details {
  padding: 19px 22px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #fff;
}

summary {
  cursor: pointer;
  font-weight: 900;
}

details p { margin-top: 10px; }

.cta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 22px;
  padding: 34px;
  border-radius: 30px;
  color: #fff;
  background: linear-gradient(135deg, #101827, #173d8f 56%, #14b8a6);
}

.cta p { color: rgba(255, 255, 255, 0.76); }

.article {
  max-width: 860px;
  padding: 54px 0;
}

.article h1 {
  max-width: 900px;
}

.article h2 {
  margin-top: 42px;
  font-size: 30px;
  letter-spacing: -0.03em;
}

.article h3 {
  margin-top: 28px;
  font-size: 21px;
}

.article p,
.article li {
  color: #344054;
}

.article-card {
  margin: 26px 0;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: #fff;
}

.footer {
  padding: 40px 0 54px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 18px;
  margin-bottom: 12px;
  color: #475569;
  font-weight: 850;
}

.footer-links a:hover { color: var(--blue); }

.footer p { margin: 0; }

.floating-contact {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
}

.floating-contact__toggle {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}

.floating-contact__button {
  position: relative;
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, #22c55e, #16a34a);
  box-shadow: 0 18px 38px rgba(22, 163, 74, 0.32);
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.floating-contact__button:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 46px rgba(22, 163, 74, 0.38);
}

.floating-contact__button::after {
  content: "";
  position: absolute;
  right: 9px;
  bottom: 5px;
  width: 17px;
  height: 17px;
  border-radius: 3px 999px 999px 999px;
  background: #16a34a;
  transform: rotate(18deg);
}

.floating-contact__bubble {
  display: grid;
  place-items: center;
  position: relative;
  z-index: 1;
  width: 36px;
  height: 30px;
}

.floating-contact__bubble svg {
  display: block;
  width: 36px;
  height: 30px;
}

.floating-contact__panel {
  position: absolute;
  right: 0;
  bottom: 78px;
  width: 238px;
  padding: 16px;
  border: 1px solid rgba(99, 102, 241, 0.16);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 20px 50px rgba(15, 23, 42, 0.18);
  backdrop-filter: blur(16px);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px) scale(0.96);
  transform-origin: right bottom;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.floating-contact__toggle:checked ~ .floating-contact__panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.floating-contact__title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 15px;
  font-weight: 950;
}

.floating-contact__close {
  color: #94a3b8;
  cursor: pointer;
  font-size: 12px;
  font-weight: 900;
}

.floating-contact__item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  width: 100%;
  padding: 9px 10px;
  border: 0;
  border-radius: 14px;
  background: #f8fafc;
  color: #475569;
  cursor: pointer;
  font-family: inherit;
  font-size: 13px;
  font-weight: 850;
  text-align: left;
}

.floating-contact__item + .floating-contact__item { margin-top: 8px; }

.floating-contact__item:hover { background: #eef6ff; }

.floating-contact__item strong {
  color: var(--indigo);
  font-size: 14px;
}

.floating-contact__copy-status {
  margin-top: 8px;
  min-height: 16px;
  color: #16a34a;
  font-size: 12px;
  font-weight: 900;
}

.floating-contact__hint {
  margin-top: 6px;
  color: #94a3b8;
  font-size: 12px;
  font-weight: 800;
}

@media (max-width: 920px) {
  .site-header {
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    transform: translateY(0);
    transition: transform 0.22s ease, box-shadow 0.22s ease;
    will-change: transform;
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
  }
  .site-header--hidden {
    pointer-events: none;
    transform: translateY(-110%);
  }
  .nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    padding: 8px 0 9px;
  }
  .brand {
    gap: 10px;
    min-width: 0;
  }
  .brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 14px;
  }
  .brand-title { font-size: 19px; }
  .brand-subtitle {
    margin-top: 2px;
    font-size: 10px;
  }
  .nav-links {
    width: 100%;
    min-width: 0;
    gap: 6px;
    overflow-x: auto;
    padding-bottom: 0;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a {
    padding: 6px 10px;
    border: 1px solid rgba(226, 232, 240, 0.92);
    background: rgba(255, 255, 255, 0.72);
    font-size: 13px;
    white-space: nowrap;
  }
  .hero,
  .article {
    padding-top: 120px;
  }
  .hero,
  .grid-3,
  .grid-2,
  .offer-grid,
  .trust-row,
  .blog-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .table-list > div {
    grid-template-columns: 1fr;
  }
  .cta {
    align-items: flex-start;
    flex-direction: column;
  }

  .floating-contact {
    right: 12px;
    bottom: 12px;
  }

  .floating-contact__button {
    width: 58px;
    height: 58px;
  }

  .floating-contact__panel {
    right: 0;
    bottom: 70px;
    width: min(300px, calc(100vw - 24px));
  }
}