:root {
  --brand: #0f3d5e;
  --brand-2: #1769aa;
  --brand-3: #1f7fbd;
  --ink: #172332;
  --text: #334155;
  --muted: #64748b;
  --line: #dbe4ee;
  --line-strong: #c8d6e6;
  --bg: #f5f8fb;
  --surface: #ffffff;
  --surface-soft: #eef5fb;
  --green: #138a63;
  --orange: #c26a14;
  --red: #b42318;
  --shadow: 0 18px 44px rgba(15, 45, 75, 0.12);
  --shadow-soft: 0 8px 24px rgba(15, 45, 75, 0.08);
  --radius: 8px;
  --icon-home: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m3 10.5 9-7 9 7'/%3E%3Cpath d='M5 10v10h14V10'/%3E%3Cpath d='M9 20v-6h6v6'/%3E%3C/svg%3E");
  --icon-download: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3v12'/%3E%3Cpath d='m7 10 5 5 5-5'/%3E%3Cpath d='M5 21h14'/%3E%3C/svg%3E");
  --icon-shield: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 22s8-4 8-10V5l-8-3-8 3v7c0 6 8 10 8 10Z'/%3E%3Cpath d='m9 12 2 2 4-4'/%3E%3C/svg%3E");
  --icon-book: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 19.5A2.5 2.5 0 0 1 6.5 17H20'/%3E%3Cpath d='M4 4.5A2.5 2.5 0 0 1 6.5 2H20v20H6.5A2.5 2.5 0 0 1 4 19.5v-15Z'/%3E%3C/svg%3E");
  --icon-search: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m21 21-4.3-4.3'/%3E%3C/svg%3E");
  --icon-support: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 14a8 8 0 0 1 16 0'/%3E%3Cpath d='M18 19c0 1.1-.9 2-2 2h-4'/%3E%3Cpath d='M4 14v3a2 2 0 0 0 2 2h1v-7H6a2 2 0 0 0-2 2Z'/%3E%3Cpath d='M20 14v3a2 2 0 0 1-2 2h-1v-7h1a2 2 0 0 1 2 2Z'/%3E%3C/svg%3E");
  --icon-map: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9 18 3 21V6l6-3 6 3 6-3v15l-6 3-6-3Z'/%3E%3Cpath d='M9 3v15'/%3E%3Cpath d='M15 6v15'/%3E%3C/svg%3E");
  --icon-camera: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M14.5 4 16 7h3a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V9a2 2 0 0 1 2-2h3l1.5-3h5Z'/%3E%3Ccircle cx='12' cy='13' r='3'/%3E%3C/svg%3E");
  --icon-copy: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='9' y='9' width='13' height='13' rx='2'/%3E%3Cpath d='M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1'/%3E%3C/svg%3E");
  --icon-package: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m21 8-9-5-9 5 9 5 9-5Z'/%3E%3Cpath d='M3 8v8l9 5 9-5V8'/%3E%3Cpath d='M12 13v8'/%3E%3C/svg%3E");
  --icon-stamp: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9 13h6'/%3E%3Cpath d='M9 17h6'/%3E%3Cpath d='M6 21h12'/%3E%3Cpath d='M8 13a4 4 0 0 1 8 0v4H8v-4Z'/%3E%3Cpath d='M12 3v6'/%3E%3C/svg%3E");
  --icon-check: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m20 6-11 11-5-5'/%3E%3C/svg%3E");
  --icon-phone: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M22 16.9v3a2 2 0 0 1-2.2 2 19.8 19.8 0 0 1-8.6-3.1 19.5 19.5 0 0 1-6-6A19.8 19.8 0 0 1 2.1 4.2 2 2 0 0 1 4.1 2h3a2 2 0 0 1 2 1.7c.1.9.3 1.7.6 2.5a2 2 0 0 1-.5 2.1L8 9.5a16 16 0 0 0 6.5 6.5l1.2-1.2a2 2 0 0 1 2.1-.5c.8.3 1.6.5 2.5.6a2 2 0 0 1 1.7 2Z'/%3E%3C/svg%3E");
  --icon-wechat-pay: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M9.5 16.5c-3.6 0-6.5-2.4-6.5-5.4S5.9 5.7 9.5 5.7s6.5 2.4 6.5 5.4-2.9 5.4-6.5 5.4Z'/%3E%3Cpath d='M7 10.5h.01'/%3E%3Cpath d='M11 10.5h.01'/%3E%3Cpath d='M15 12.2c3.1.3 5.4 2.4 5.4 5 0 1-.4 1.9-1 2.7l.5 2.1-2.4-1.1c-.8.3-1.7.5-2.6.5-2.8 0-5.2-1.7-5.8-4'/%3E%3C/svg%3E");
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

a {
  color: var(--brand-2);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(219, 228, 238, 0.9);
  backdrop-filter: blur(16px);
}

.nav-shell {
  width: min(1440px, calc(100% - 80px));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 700;
  white-space: nowrap;
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: block;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 8px 20px rgba(23, 105, 170, 0.22);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand small {
  display: block;
  margin-top: -3px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a {
  padding: 8px 12px;
  border-radius: 6px;
  color: #475569;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.site-nav a.active {
  background: #eef5fb;
  color: var(--brand-2);
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--brand-2);
  text-decoration: none;
}

.site-nav a::before,
.button::before,
.buy-plan-btn::before,
.feature-icon::before,
.workflow-item::after,
.step-card::after,
.download-feature-list div::before,
.support-card h3::before,
.buy-security-card .download-badge::before,
.buy-plan::after {
  content: "";
  width: 1em;
  height: 1em;
  flex: 0 0 auto;
  background: currentColor;
  -webkit-mask: var(--icon-check) center / contain no-repeat;
  mask: var(--icon-check) center / contain no-repeat;
}

.site-nav a[href="/"]::before {
  -webkit-mask-image: var(--icon-home);
  mask-image: var(--icon-home);
}

.site-nav a[href="/download"]::before,
.button[href="/download"]::before {
  -webkit-mask-image: var(--icon-download);
  mask-image: var(--icon-download);
}

.site-nav a[href="/buy"]::before,
.button[href="/buy"]::before {
  -webkit-mask-image: var(--icon-shield);
  mask-image: var(--icon-shield);
}

.site-nav a[href="/usage"]::before,
.button[href="/usage"]::before {
  -webkit-mask-image: var(--icon-book);
  mask-image: var(--icon-book);
}

.site-nav a[href="/lookup"]::before,
.button[href="/lookup"]::before {
  -webkit-mask-image: var(--icon-search);
  mask-image: var(--icon-search);
}

.site-nav a[href="/support"]::before,
.button[href="/support"]::before {
  -webkit-mask-image: var(--icon-support);
  mask-image: var(--icon-support);
}

.button[href^="tel:"]::before {
  -webkit-mask-image: var(--icon-phone);
  mask-image: var(--icon-phone);
}

.container {
  width: min(1440px, calc(100% - 80px));
  margin: 0 auto;
}

.hero {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(115deg, rgba(15, 61, 94, 0.96), rgba(23, 105, 170, 0.88)),
    radial-gradient(circle at 85% 12%, rgba(255, 255, 255, 0.18), transparent 32%);
  color: #fff;
}

.hero .container {
  min-height: 620px;
  padding: 82px 0 54px;
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(440px, 1.12fr);
  align-items: center;
  gap: 48px;
}

.eyebrow {
  margin: 0 0 14px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
  font-weight: 600;
}

.hero h1 {
  margin: 0;
  color: #fff;
  font-size: 48px;
  line-height: 1.15;
  letter-spacing: 0;
}

.hero-lead {
  margin: 22px 0 0;
  max-width: 620px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 18px;
}

.hero-actions,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button,
button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 10px 17px;
  background: var(--brand-2);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.button::before,
.buy-plan-btn::before {
  width: 16px;
  height: 16px;
  color: inherit;
}

.buy-plan-btn::before {
  -webkit-mask-image: var(--icon-shield);
  mask-image: var(--icon-shield);
}

.button:hover,
button:hover {
  text-decoration: none;
  background: #125d99;
}

.button.secondary,
button.secondary {
  background: #fff;
  border-color: var(--line-strong);
  color: var(--brand-2);
}

.button.secondary:hover,
button.secondary:hover {
  background: #eef5fb;
}

.button.light {
  background: rgba(255, 255, 255, 0.13);
  border-color: rgba(255, 255, 255, 0.38);
  color: #fff;
}

.button.light:hover {
  background: rgba(255, 255, 255, 0.22);
}

button:disabled {
  opacity: 0.68;
  cursor: wait;
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 36px;
}

.hero-point {
  padding: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

.hero-point strong {
  display: block;
  color: #fff;
  font-size: 18px;
}

.hero-point span {
  display: block;
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}

.hero-media {
  position: relative;
}

.hero-media img {
  width: 100%;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  box-shadow: 0 28px 70px rgba(4, 18, 32, 0.38);
}

.media-note {
  position: absolute;
  right: 18px;
  bottom: 18px;
  width: min(310px, calc(100% - 36px));
  padding: 12px 14px;
  border-radius: 8px;
  color: #dcebf7;
  background: rgba(8, 26, 44, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 13px;
}

.section {
  padding: 72px 0;
}

.section.white {
  background: #fff;
}

.section-head {
  max-width: 760px;
  margin-bottom: 28px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-kicker {
  margin: 0 0 8px;
  color: var(--brand-2);
  font-size: 13px;
  font-weight: 800;
}

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.28;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: 32px;
}

h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

p {
  margin: 0 0 12px;
}

.muted {
  color: var(--muted);
}

.grid-3,
.grid-4,
.support-grid {
  display: grid;
  gap: 18px;
}

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

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

@media (min-width: 1200px) {
  .grid-4 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 721px) and (max-width: 1199px) {
  .grid-4 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.support-grid {
  grid-template-columns: 1.1fr 0.9fr;
}

.support-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  column-gap: 26px;
  align-items: start;
}

.support-card h3,
.support-card p,
.support-card .actions {
  grid-column: 1;
}

.support-card h3 {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.support-card h3::before {
  width: 22px;
  height: 22px;
  color: var(--brand-2);
  -webkit-mask-image: var(--icon-support);
  mask-image: var(--icon-support);
}

.support-card .actions {
  align-self: end;
}

.contact-code-grid {
  grid-column: 2;
  grid-row: 1 / span 5;
  display: grid;
  grid-template-columns: repeat(2, clamp(126px, 8.8vw, 180px));
  gap: 20px;
  align-items: start;
}

.contact-code {
  text-align: center;
}

.contact-code img {
  width: 100%;
  height: auto;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  object-fit: cover;
  box-shadow: var(--shadow-soft);
}

.contact-code span {
  display: block;
  margin-top: 10px;
  color: var(--brand-2);
  font-size: 15px;
  font-weight: 800;
}

.card,
.feature-card,
.step-card,
.query-card,
.toc-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}

.grid-3 .feature-card:not(.support-card) {
  position: relative;
  overflow: hidden;
}

.grid-3 .feature-card:not(.support-card)::after {
  content: "";
  position: absolute;
  top: 20px;
  right: 20px;
  width: 24px;
  height: 24px;
  background: #a9bfd2;
  -webkit-mask: var(--icon-check) center / contain no-repeat;
  mask: var(--icon-check) center / contain no-repeat;
}

.grid-3 .feature-card:nth-child(1)::after {
  -webkit-mask-image: var(--icon-search);
  mask-image: var(--icon-search);
}

.grid-3 .feature-card:nth-child(2)::after {
  -webkit-mask-image: var(--icon-book);
  mask-image: var(--icon-book);
}

.grid-3 .feature-card:nth-child(3)::after {
  -webkit-mask-image: var(--icon-support);
  mask-image: var(--icon-support);
}

.feature-card,
.step-card {
  padding: 22px;
}

.feature-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  border-radius: 8px;
  background: linear-gradient(135deg, #e8f2fb, #d9edf8);
  color: var(--brand-2);
  font-size: 0;
}

.feature-icon::before {
  width: 22px;
  height: 22px;
}

.grid-4 .feature-card:nth-child(1) .feature-icon::before {
  -webkit-mask-image: var(--icon-map);
  mask-image: var(--icon-map);
}

.grid-4 .feature-card:nth-child(2) .feature-icon::before {
  -webkit-mask-image: var(--icon-camera);
  mask-image: var(--icon-camera);
}

.grid-4 .feature-card:nth-child(3) .feature-icon::before,
.download-feature-list div:nth-child(1)::before {
  -webkit-mask-image: var(--icon-search);
  mask-image: var(--icon-search);
}

.grid-4 .feature-card:nth-child(4) .feature-icon::before,
.download-feature-list div:nth-child(3)::before {
  -webkit-mask-image: var(--icon-copy);
  mask-image: var(--icon-copy);
}

.grid-4 .feature-card:nth-child(5) .feature-icon::before {
  -webkit-mask-image: var(--icon-package);
  mask-image: var(--icon-package);
}

.grid-4 .feature-card:nth-child(6) .feature-icon::before {
  -webkit-mask-image: var(--icon-stamp);
  mask-image: var(--icon-stamp);
}

.download-feature-list div:nth-child(2)::before {
  -webkit-mask-image: var(--icon-camera);
  mask-image: var(--icon-camera);
}

.workflow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.workflow-item {
  position: relative;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
}

.workflow-item::after {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 22px;
  height: 22px;
  color: #9db8ce;
}

.workflow-item:nth-child(1)::after,
.step-card:nth-child(1)::after {
  -webkit-mask-image: var(--icon-package);
  mask-image: var(--icon-package);
}

.workflow-item:nth-child(2)::after,
.step-card:nth-child(3)::after {
  -webkit-mask-image: var(--icon-camera);
  mask-image: var(--icon-camera);
}

.workflow-item:nth-child(3)::after,
.step-card:nth-child(4)::after {
  -webkit-mask-image: var(--icon-search);
  mask-image: var(--icon-search);
}

.workflow-item:nth-child(4)::after {
  -webkit-mask-image: var(--icon-map);
  mask-image: var(--icon-map);
}

.workflow-item:nth-child(5)::after,
.step-card:nth-child(2)::after {
  -webkit-mask-image: var(--icon-copy);
  mask-image: var(--icon-copy);
}

.workflow-item span {
  display: inline-flex;
  width: 28px;
  height: 28px;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
}

.page-hero {
  padding: 58px 0;
  color: #fff;
  background: linear-gradient(115deg, var(--brand), var(--brand-2));
}

.page-hero h1 {
  margin: 0;
  color: #fff;
  font-size: 38px;
}

.page-hero p {
  max-width: 760px;
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 17px;
}

.download-hero {
  padding: 0;
}

.download-hero-grid {
  min-height: 460px;
  padding: 70px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 420px;
  gap: 48px;
  align-items: center;
}

.download-hero .section-kicker {
  color: rgba(255, 255, 255, 0.78);
}

.download-panel {
  padding: 28px;
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.34);
  box-shadow: 0 28px 70px rgba(4, 18, 32, 0.26);
}

.download-quick-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.download-quick-facts span {
  padding: 7px 11px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.82);
  font-size: 13px;
  font-weight: 700;
}

.download-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  margin-bottom: 14px;
  border-radius: 999px;
  background: #e8f2fb;
  color: var(--brand-2);
  font-size: 13px;
  font-weight: 800;
}

.download-panel h2 {
  font-size: 34px;
}

.download-panel p {
  color: var(--muted);
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.download-meta {
  margin-top: 18px;
  font-size: 13px;
}

.download-product-section {
  padding-top: 62px;
}

.download-product-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(520px, 1.22fr);
  gap: 42px;
  align-items: center;
}

.download-product-copy {
  max-width: 520px;
}

.download-feature-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.download-feature-list div {
  position: relative;
  min-height: 70px;
  padding: 14px 16px 14px 52px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f7fbff;
}

.download-feature-list div::before {
  position: absolute;
  top: 18px;
  left: 16px;
  width: 22px;
  height: 22px;
  color: var(--brand-2);
}

.download-feature-list strong {
  display: block;
  color: var(--ink);
  font-size: 15px;
}

.download-feature-list span {
  display: block;
  margin-top: 2px;
  color: var(--muted);
  font-size: 13px;
}

.download-product-shot {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  box-shadow: var(--shadow);
}

.download-product-shot img {
  width: 100%;
  border-radius: 7px;
}

.download-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.step-number {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  border-radius: 50%;
  background: var(--brand);
  color: #fff;
  font-weight: 800;
}

.step-card {
  position: relative;
  overflow: hidden;
}

.step-card::after {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 24px;
  height: 24px;
  color: #a4b9cc;
}

.download-info-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.buy-hero {
  padding: 0;
}

.buy-hero-grid {
  min-height: 440px;
  padding: 68px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 46px;
  align-items: center;
}

.buy-hero .section-kicker {
  color: rgba(255, 255, 255, 0.78);
}

.buy-security-card {
  padding: 28px;
  border-radius: 8px;
  background: #fff;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.34);
  box-shadow: 0 28px 70px rgba(4, 18, 32, 0.26);
}

.buy-security-card .download-badge {
  gap: 7px;
}

.buy-security-card .download-badge::before {
  width: 15px;
  height: 15px;
  -webkit-mask-image: var(--icon-shield);
  mask-image: var(--icon-shield);
}

.purchase-warning {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid #f0d6b7;
  border-radius: 8px;
  background: #fff8ef;
  color: #8a3f0b;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.55;
}

.buy-plans {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.buy-plan {
  position: relative;
  overflow: hidden;
  min-height: 210px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-soft);
  display: flex;
  flex-direction: column;
}

.buy-plan::after {
  position: absolute;
  top: 22px;
  right: 22px;
  width: 26px;
  height: 26px;
  color: #afc4d6;
  -webkit-mask-image: var(--icon-shield);
  mask-image: var(--icon-shield);
}

.buy-plan.featured {
  border-color: #9fc6e4;
  background: #f6fbff;
}

.buy-plan span {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 3px 10px;
  margin-bottom: 18px;
  border-radius: 999px;
  background: #e8f2fb;
  color: var(--brand-2);
  font-size: 13px;
  font-weight: 800;
  width: fit-content;
}

.buy-plan strong {
  display: block;
  margin: 8px 0 8px;
  color: var(--brand);
  font-size: 28px;
  line-height: 1.15;
}

.buy-plan-desc {
  flex: 1;
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.buy-plan-notice {
  margin: 0 0 14px;
  padding: 8px 10px;
  border: 1px solid #f0d6b7;
  border-radius: 6px;
  background: #fff8ef;
  color: #9a4f0f;
  font-size: 13px;
  line-height: 1.5;
}

.buy-plan-price {
  margin: 0 0 16px;
  color: var(--brand-2);
  font-size: 22px;
  font-weight: 800;
}

.buy-plan-btn {
  width: 100%;
  min-height: 44px;
  margin-top: auto;
  border: 0;
  border-radius: 6px;
  background: var(--brand);
  color: #fff;
  font: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.buy-plan-btn:hover {
  background: var(--brand-2);
}

.buy-plan-loading {
  display: flex;
  align-items: center;
  justify-content: center;
}

.buy-steps-inline {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
}

.buy-modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 16px;
}

.buy-modal.hidden {
  display: none !important;
}

.buy-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(8, 20, 36, 0.55);
}

.buy-modal-panel {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  max-height: min(92vh, 720px);
  overflow: auto;
  padding: 24px;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 24px 64px rgba(4, 18, 32, 0.28);
}

.buy-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.buy-modal-header h2 {
  margin: 0;
  font-size: 20px;
}

.buy-modal-close {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
}

.buy-modal-product {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
  padding: 14px 16px;
  border-radius: 8px;
  background: #f8fbfe;
  border: 1px solid var(--line);
  font-size: 14px;
}

.buy-modal-product div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.buy-modal-product span {
  color: var(--muted);
}

.buy-modal-primary {
  width: 100%;
  min-height: 48px;
}

.buy-modal-primary:disabled {
  cursor: not-allowed;
}

.purchase-confirm-box {
  margin: 12px 0 14px;
  padding: 14px 16px;
  border: 1px solid #f0d6b7;
  border-radius: 8px;
  background: #fffaf4;
}

.purchase-confirm-box strong {
  display: block;
  margin-bottom: 7px;
  color: #8a3f0b;
  font-size: 14px;
}

.purchase-confirm-box p {
  margin: 0 0 12px;
  color: #9a4f0f;
  font-size: 13px;
  line-height: 1.55;
}

.purchase-confirm-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 10px 12px;
  border: 1px solid rgba(240, 214, 183, 0.78);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.62);
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
}

.purchase-confirm-row input[type="checkbox"] {
  appearance: auto;
  width: 18px;
  min-width: 18px;
  height: 18px;
  min-height: 18px;
  margin: 0;
  padding: 0;
  border-radius: 4px;
  accent-color: var(--brand-2);
  flex: 0 0 auto;
}

.purchase-confirm-row span {
  flex: 1;
}

.buy-modal .hidden {
  display: none !important;
}

.buy-modal .pay-tip,
.buy-modal .pay-order-no,
.buy-modal .pay-status {
  text-align: center;
}

.buy-modal .pay-status {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--green);
  font-weight: 700;
}

.buy-modal .pay-status::before {
  content: "";
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  background: currentColor;
  -webkit-mask: var(--icon-wechat-pay) center / contain no-repeat;
  mask: var(--icon-wechat-pay) center / contain no-repeat;
}

.buy-modal .qr-wrap {
  display: flex;
  justify-content: center;
  margin: 0 auto 12px;
}

.buy-modal .result {
  margin-top: 0;
}

.buy-modal .actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.buy-modal #modalPhoneStep .actions {
  margin-top: 0;
}

.buy-modal .actions .button,
.buy-modal .actions button {
  flex: 1;
  min-width: 120px;
}

.buy-checkout .hidden,
.hidden {
  display: none !important;
}

.required-mark {
  color: var(--red);
}

.sms-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.sms-row button {
  white-space: nowrap;
  min-width: 118px;
}

.buy-user-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
  padding: 12px 14px;
  border-radius: 6px;
  background: #f0f8ff;
  border: 1px solid #b9d8ee;
  font-size: 14px;
}

.link-btn {
  border: 0;
  background: transparent;
  color: var(--brand-2);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
  text-decoration: underline;
  padding: 0;
}

.buy-summary {
  display: grid;
  gap: 10px;
  margin: 16px 0 18px;
  padding: 14px 16px;
  border-radius: 6px;
  background: #f8fbfe;
  border: 1px solid var(--line);
}

.buy-summary div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 14px;
}

.buy-summary span {
  color: var(--muted);
}

.buy-summary .buy-price {
  color: var(--brand);
  font-size: 20px;
}

.pay-panel {
  margin-top: 4px;
  padding: 18px;
  border: 1px solid #b9d8ee;
  border-radius: var(--radius);
  background: #f8fbfe;
  text-align: center;
}

.pay-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 16px;
}

.pay-panel-head span {
  color: var(--brand);
  font-size: 22px;
  font-weight: 800;
}

.pay-tip {
  margin: 0 0 16px;
  font-size: 13px;
}

.qr-wrap {
  display: inline-flex;
  padding: 12px;
  border-radius: 8px;
  background: #fff;
  border: 1px solid var(--line);
}

.pay-status {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.pay-order-no {
  margin: 0 0 12px;
  font-size: 13px;
  color: var(--muted);
}

.lookup-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
}

.lookup-tab {
  border: 1px solid var(--line-strong);
  background: #fff;
  color: var(--muted);
  border-radius: 999px;
  padding: 8px 16px;
  font: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
}

.lookup-tab.active {
  border-color: var(--brand-2);
  background: #eef6fd;
  color: var(--brand);
}

.lookup-orders {
  display: none;
  margin-top: 20px;
}

.lookup-orders.show {
  display: block;
}

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

.order-item {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.order-item-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 14px;
}

.order-item .code-value {
  font-size: 20px;
}

.order-item .meta {
  margin-top: 6px;
}

.buy-form-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: 24px;
  align-items: start;
}

.buy-steps {
  display: grid;
  gap: 16px;
}

select {
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

select:focus {
  outline: none;
  border-color: var(--brand-2);
  box-shadow: 0 0 0 4px rgba(23, 105, 170, 0.12);
}

.clean-list {
  margin: 0;
  padding-left: 1.15em;
}

.clean-list li {
  margin: 8px 0;
}

.doc-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.toc-card {
  position: sticky;
  top: 88px;
  padding: 18px;
}

.toc-card strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
}

.toc-card a {
  display: block;
  padding: 7px 0;
  color: #475569;
  font-size: 14px;
}

.doc {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow-soft);
}

.doc h2 {
  margin: 34px 0 14px;
  padding-top: 8px;
  font-size: 24px;
}

.doc h2:first-child {
  margin-top: 0;
}

.doc h3 {
  margin-top: 22px;
}

.doc ol,
.doc ul {
  margin: 0 0 18px;
  padding-left: 1.35em;
}

.doc li {
  margin: 7px 0;
}

code {
  padding: 2px 6px;
  border-radius: 4px;
  background: #eef5fb;
  color: #163955;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.94em;
}

.note,
.warning {
  margin: 18px 0;
  padding: 14px 16px;
  border-radius: var(--radius);
  border: 1px solid #cfe0ef;
  background: #f0f7fd;
  color: #2f4b63;
}

.warning {
  border-color: #f2d3aa;
  background: #fff7ed;
  color: #70420e;
}

.query-shell {
  max-width: 760px;
  margin: 0 auto;
}

.query-card {
  padding: 28px;
}

label {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
}

input {
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font: inherit;
}

input:focus {
  outline: none;
  border-color: var(--brand-2);
  box-shadow: 0 0 0 4px rgba(23, 105, 170, 0.12);
}

.input-code {
  font-family: Consolas, "Courier New", monospace;
  letter-spacing: 0;
}

.error {
  display: none;
  margin-top: 14px;
  color: var(--red);
  font-size: 14px;
}

.error.show {
  display: block;
}

.result {
  display: none;
  margin-top: 20px;
  padding: 18px;
  border: 1px solid #b9d8ee;
  border-radius: var(--radius);
  background: #f0f8ff;
}

.result.show {
  display: block;
}

.result-label {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
}

.code-box {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.code-value {
  color: var(--brand);
  font-family: Consolas, "Courier New", monospace;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0;
}

.meta {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  font-size: 13px;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

@media (max-width: 980px) {
  .hero .container,
  .support-grid,
  .doc-layout,
  .download-product-grid,
  .download-hero-grid,
  .download-info-grid,
  .buy-hero-grid,
  .buy-form-grid {
    grid-template-columns: 1fr;
  }

  .hero .container {
    min-height: 0;
  }

  .hero h1 {
    font-size: 40px;
  }

  .grid-3,
  .download-steps,
  .buy-plans,
  .workflow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-4 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .support-card {
    grid-template-columns: 1fr;
  }

  .support-card h3,
  .support-card p,
  .support-card .actions,
  .contact-code-grid {
    grid-column: 1;
  }

  .contact-code-grid {
    grid-row: auto;
    grid-template-columns: repeat(2, minmax(120px, 160px));
    margin: 14px 0 2px;
  }

  .toc-card {
    position: static;
  }
}

@media (max-width: 720px) {
  .nav-shell,
  .container {
    width: min(100% - 28px, 1180px);
  }

  .nav-shell {
    min-height: auto;
    padding: 12px 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .site-nav {
    width: 100%;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .site-nav a {
    white-space: nowrap;
  }

  .hero .container {
    padding: 50px 0 38px;
    gap: 32px;
  }

  .download-hero-grid {
    min-height: 0;
    padding: 46px 0;
    gap: 28px;
  }

  .buy-hero-grid {
    min-height: 0;
    padding: 46px 0;
    gap: 28px;
  }

  .download-product-grid {
    gap: 28px;
  }

  .download-product-copy {
    max-width: none;
  }

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

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

  .hero-points,
  .grid-3,
  .grid-4,
  .download-steps,
  .buy-plans,
  .buy-steps-inline,
  .workflow {
    grid-template-columns: 1fr;
  }

  .contact-code-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }


  .section {
    padding: 48px 0;
  }

  h2 {
    font-size: 26px;
  }

  .doc,
  .query-card {
    padding: 22px 18px;
  }

  .sms-row {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    align-items: flex-start;
    flex-direction: column;
  }
}