:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --ink: #111827;
  --text: #263242;
  --muted: #667085;
  --line: #d8e1ec;
  --soft: #eaf4ff;
  --blue: #4f95e8;
  --blue-strong: #1f73d8;
  --teal: #20b8c8;
  --green: #2ea86f;
  --red: #ef4444;
  --shadow: 0 24px 70px rgba(26, 43, 68, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
html:lang(zh-Hans) body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 72px;
  padding: 14px max(24px, calc((100vw - 1160px) / 2));
  background: rgba(246, 248, 251, 0.9);
  border-bottom: 1px solid rgba(216, 225, 236, 0.84);
  backdrop-filter: blur(16px);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 850;
  white-space: nowrap;
}
.brand img { border-radius: 12px; }
.site-nav {
  display: flex;
  flex: 1;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav::-webkit-scrollbar { display: none; }
.site-nav a {
  flex: 0 0 auto;
  border-radius: 999px;
  padding: 8px 12px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 760;
}
.site-nav a:hover,
.site-nav a[aria-current="page"] {
  background: var(--soft);
  color: var(--ink);
}
.nav-cta,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid transparent;
  border-radius: 10px;
  padding: 0 18px;
  font-weight: 850;
  white-space: nowrap;
}
.nav-cta,
.button.primary {
  background: linear-gradient(135deg, #ff5a3d, #e42d62);
  color: #fff;
  box-shadow: 0 14px 34px rgba(228, 45, 98, 0.2);
}
.button.secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
}
main {
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
}
.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  gap: 44px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 54px 0 46px;
}
.kicker,
.eyebrow {
  margin: 0 0 12px;
  color: var(--blue-strong);
  font-size: 14px;
  font-weight: 850;
}
h1, h2, h3, p { margin-top: 0; }
h1,
h2,
h3,
.brand,
.button,
.nav-cta {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
html:lang(zh-Hans) h1,
html:lang(zh-Hans) h2,
html:lang(zh-Hans) h3,
html:lang(zh-Hans) .brand,
html:lang(zh-Hans) .button,
html:lang(zh-Hans) .nav-cta {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
h1 {
  max-width: 680px;
  margin-bottom: 18px;
  color: var(--ink);
  font-size: clamp(42px, 5.4vw, 68px);
  line-height: 1;
  font-weight: 860;
}
h2 {
  margin-bottom: 14px;
  color: var(--ink);
  font-size: clamp(30px, 3vw, 46px);
  line-height: 1.05;
  font-weight: 820;
}
h3 {
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.2;
  font-weight: 760;
}
p { color: var(--muted); }
.hero-subcopy {
  max-width: 560px;
  margin-bottom: 24px;
  font-size: 18px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}
.trust-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}
.trust-list li {
  position: relative;
  min-height: 48px;
  display: flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 10px 12px 10px 30px;
  color: var(--ink);
  font-weight: 780;
}
.trust-list li::before {
  content: "";
  position: absolute;
  left: 12px;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--teal);
}
.privacy-note {
  margin: 0;
  color: #788497;
  font-size: 13px;
  font-weight: 700;
}
.hero .trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.hero .trust-list li {
  min-height: 34px;
  border-radius: 999px;
  padding: 7px 12px 7px 28px;
  box-shadow: none;
  font-size: 14px;
  line-height: 1.1;
}
.hero .trust-list li::before {
  left: 12px;
  width: 7px;
  height: 7px;
}
.hero-media,
.privacy-card {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.hero-media img {
  width: 100%;
  height: auto;
}
.privacy-card {
  padding: 30px;
}
.privacy-card .trust-list {
  grid-template-columns: 1fr;
  margin-bottom: 0;
}
.section {
  padding: 70px 0;
  border-top: 1px solid var(--line);
}
.section-head {
  max-width: 780px;
}
.section-head p {
  font-size: 18px;
}
.text-link {
  display: inline-flex;
  margin-top: 8px;
  color: var(--blue-strong);
  font-weight: 850;
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}
.steps li {
  counter-increment: step;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 24px;
}
.steps li::before {
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 16px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--blue-strong);
  font-weight: 900;
}
.steps span {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 19px;
  font-weight: 850;
}
.steps p { margin-bottom: 0; }
.card-grid,
.format-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 26px;
}
.card,
.format-grid article {
  min-height: 178px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 24px;
  box-shadow: 0 16px 40px rgba(28, 46, 74, 0.07);
}
.card p,
.format-grid p {
  margin-bottom: 0;
}
.format-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.format-grid strong {
  display: inline-flex;
  margin-top: 16px;
  color: var(--ink);
}
.feature-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  gap: 18px;
  align-items: stretch;
  margin-top: 28px;
}
.feature-split figure {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  overflow: hidden;
  box-shadow: var(--shadow);
}
.feature-split img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.mini-feature-grid {
  display: grid;
  gap: 12px;
}
.mini-feature-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 20px;
}
.mini-feature-grid p { margin-bottom: 0; }
.shortcut-panel,
.pricing-panel {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}
.shortcut-panel {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.7fr);
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #fff;
  padding: 26px;
  box-shadow: 0 16px 40px rgba(28, 46, 74, 0.07);
}
.shortcut-panel span,
.price-card p {
  display: block;
  margin: 0 0 6px;
  color: var(--blue-strong);
  font-size: 13px;
  font-weight: 850;
}
.shortcut-panel strong {
  display: block;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.15;
}
.shortcut-panel p { margin: 10px 0 0; }
.shortcut-keys {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
}
.shortcut-keys kbd {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  padding: 6px 10px;
  color: var(--blue-strong);
  font-family: inherit;
  font-weight: 900;
}
.shortcut-keys span {
  margin: 0;
  color: var(--ink);
  font-size: 16px;
}
.pricing-panel {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.price-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 24px;
  box-shadow: 0 16px 40px rgba(28, 46, 74, 0.07);
}
.price-card.featured {
  border-color: rgba(239, 68, 68, 0.36);
  background: linear-gradient(135deg, #fff, #fff4f3);
}
.price-card h3 {
  margin-bottom: 10px;
  font-size: 26px;
}
.price-card s {
  color: #9aa4b2;
  font-weight: 760;
}
.price-card span {
  color: var(--muted);
}
.bottom-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(135deg, #fff, #eaf4ff);
  padding: 34px;
  margin: 32px 0 70px;
}
.bottom-cta h2 {
  max-width: 760px;
  margin-bottom: 0;
  font-size: clamp(28px, 3vw, 42px);
}
.faq-section {
  padding-top: 0;
  border-top: 0;
}
.faq-list {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}
details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 18px 20px;
}
summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 850;
}
details p {
  margin: 12px 0 0;
}
.site-footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.9fr);
  gap: 32px;
  width: min(1160px, calc(100% - 32px));
  margin: 0 auto;
  padding: 42px 0;
  border-top: 1px solid var(--line);
}
.site-footer p { margin: 12px 0 0; }
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  justify-content: flex-end;
}
.site-footer nav a {
  color: var(--muted);
  font-weight: 720;
}
@media (max-width: 980px) {
  .site-header { align-items: flex-start; flex-wrap: wrap; }
  .site-nav { order: 3; width: 100%; }
  .nav-cta { margin-left: auto; }
  .hero,
  .site-footer,
  .feature-split,
  .shortcut-panel { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .steps,
  .card-grid,
  .pricing-panel { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .site-footer nav { justify-content: flex-start; }
}
@media (max-width: 640px) {
  .site-header { padding: 12px 16px; }
  .brand span { max-width: 180px; overflow: hidden; text-overflow: ellipsis; }
  main,
  .site-footer { width: min(100% - 24px, 1160px); }
  .hero { gap: 26px; padding-top: 38px; }
  h1 { font-size: 42px; }
  .hero-subcopy { font-size: 18px; }
  .trust-list,
  .steps,
  .card-grid,
  .format-grid,
  .pricing-panel { grid-template-columns: 1fr; }
  .section { padding: 52px 0; }
  .bottom-cta { align-items: stretch; flex-direction: column; padding: 24px; }
  .button,
  .nav-cta { width: 100%; }
}