:root {
  --bg: #f4f7fb;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-strong: #ffffff;
  --text: #172033;
  --muted: #647089;
  --line: rgba(23, 32, 51, 0.08);
  --brand: #2e76d4;
  --brand-strong: #1552a8;
  --brand-soft: rgba(46, 118, 212, 0.12);
  --success: #2d9966;
  --warning: #ce7a18;
  --shadow: 0 24px 60px rgba(19, 35, 62, 0.12);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(78, 145, 231, 0.18), transparent 26%),
    radial-gradient(circle at right top, rgba(35, 191, 138, 0.12), transparent 18%),
    linear-gradient(180deg, #f8fbff 0%, #eef3f9 100%);
}

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

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

.site-shell {
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(248, 251, 255, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.7);
}

.header-inner,
.section-inner,
.footer-inner {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 78px;
  gap: 20px;
}

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

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  box-shadow: 0 12px 24px rgba(46, 118, 212, 0.2);
}

.brand-copy strong {
  display: block;
  font-size: 17px;
}

.brand-copy span {
  display: block;
  margin-top: 2px;
  font-size: 12px;
  color: var(--muted);
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav a {
  font-size: 14px;
  color: var(--muted);
}

.nav a:hover {
  color: var(--text);
}

.header-actions {
  display: flex;
  gap: 12px;
}

.hero {
  padding: 64px 0 56px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 38px;
  align-items: stretch;
}

.hero-copy,
.hero-preview,
.feature-card,
.pricing-card,
.faq-card,
.simple-panel {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero-copy {
  padding: 50px;
  border-radius: 36px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand-strong);
  background: var(--brand-soft);
}

.hero h1,
.page-hero h1 {
  margin: 20px 0 14px;
  line-height: 1.08;
  font-size: clamp(38px, 6vw, 62px);
  letter-spacing: -0.04em;
}

.lead {
  margin: 0;
  font-size: 18px;
  line-height: 1.8;
  color: #4b566f;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.meta-pill {
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(23, 32, 51, 0.06);
  color: #33405c;
  font-size: 14px;
}

.hero-preview {
  border-radius: 36px;
  padding: 26px;
}

.window {
  overflow: hidden;
  border-radius: 24px;
  background: linear-gradient(180deg, #f6f8fb 0%, #e8eef7 100%);
  border: 1px solid rgba(23, 32, 51, 0.08);
}

.window-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid rgba(23, 32, 51, 0.06);
}

.window-dots {
  display: flex;
  gap: 8px;
}

.window-dots span {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: #ff5f57;
}

.window-dots span:nth-child(2) {
  background: #febc2e;
}

.window-dots span:nth-child(3) {
  background: #28c840;
}

.window-body {
  display: grid;
  gap: 22px;
  padding: 24px;
}

.preview-top {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 18px;
}

.card {
  padding: 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid rgba(23, 32, 51, 0.07);
}

.card h3,
.section-title h2,
.pricing-card h3,
.faq-card h3 {
  margin: 0 0 12px;
}

.mock-lines {
  display: grid;
  gap: 10px;
}

.mock-lines span,
.output-row span:first-child,
.faq-item p,
.small-note,
.page-hero p,
.section-title p,
.pricing-card p,
.feature-card p,
.timeline-content p,
.simple-panel p,
.log-entry p,
.privacy-card p {
  color: var(--muted);
}

.mock-lines span {
  height: 14px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(46, 118, 212, 0.14), rgba(46, 118, 212, 0.04));
}

.mock-lines span:nth-child(2) {
  width: 78%;
}

.mock-lines span:nth-child(3) {
  width: 64%;
}

.preview-stage {
  min-height: 260px;
  padding: 18px;
  border-radius: 24px;
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 248, 239, 0.3), rgba(250, 244, 228, 0.55)),
    linear-gradient(135deg, #cdd8e9 0%, #efe3d0 100%);
}

.preview-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 18%, rgba(255, 255, 255, 0.7), transparent 25%),
    radial-gradient(circle at 78% 30%, rgba(49, 88, 51, 0.35), transparent 30%),
    linear-gradient(180deg, transparent 0%, rgba(15, 34, 60, 0.08) 100%);
}

.preview-photo {
  position: relative;
  min-height: 100%;
  border-radius: 20px;
}

.preview-watermark {
  position: absolute;
  right: 22px;
  bottom: 18px;
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.24);
  backdrop-filter: blur(8px);
}

.preview-watermark strong {
  font-size: 24px;
}

.preview-watermark span {
  font-size: 14px;
}

.preview-bottom {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.preview-bottom .card:last-child {
  grid-column: 1 / -1;
}

.output-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  align-items: start;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px dashed rgba(23, 32, 51, 0.08);
  font-size: 14px;
}

.output-row:last-child {
  border-bottom: 0;
}

.output-row strong {
  line-height: 1.55;
  word-break: keep-all;
}

.section {
  padding: 56px 0;
}

.section-title {
  max-width: 760px;
  margin-bottom: 30px;
}

.section-title h2 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
}

.section-title p {
  margin: 0;
  line-height: 1.8;
}

.feature-grid,
.pricing-grid,
.faq-grid,
.story-grid,
.privacy-grid,
.activate-grid {
  display: grid;
  gap: 24px;
}

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

.feature-card,
.pricing-card,
.faq-card,
.simple-panel,
.privacy-card {
  border-radius: 26px;
}

.feature-card,
.pricing-card,
.faq-card,
.simple-panel,
.privacy-card,
.timeline-content {
  padding: 28px;
}

.feature-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  margin-bottom: 16px;
  font-size: 22px;
  background: linear-gradient(135deg, rgba(46, 118, 212, 0.16), rgba(63, 210, 167, 0.18));
}

.feature-list,
.pricing-list,
.download-list,
.faq-list,
.timeline-list,
.contact-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.feature-list li,
.pricing-list li,
.download-list li,
.faq-list li,
.timeline-list li,
.contact-list li {
  position: relative;
  padding-left: 18px;
  line-height: 1.7;
  color: #3d4962;
}

.feature-list li::before,
.pricing-list li::before,
.download-list li::before,
.faq-list li::before,
.timeline-list li::before,
.contact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
}

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

.pricing-card.highlight {
  background: linear-gradient(145deg, rgba(33, 95, 177, 0.96), rgba(44, 140, 218, 0.96));
  color: white;
}

.pricing-card.highlight p,
.pricing-card.highlight li,
.pricing-card.highlight .price-note {
  color: rgba(255, 255, 255, 0.82);
}

.pricing-card.highlight li::before {
  background: rgba(255, 255, 255, 0.9);
}

.price {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 24px 0 10px;
}

.price strong {
  font-size: 42px;
}

.price-note {
  font-size: 14px;
  color: var(--muted);
}

.story-grid {
  grid-template-columns: 1fr;
  align-items: start;
}

.timeline {
  display: grid;
  gap: 18px;
}

.timeline-wide {
  max-width: 920px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 16px;
}

.timeline-marker {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 700;
  background: rgba(46, 118, 212, 0.14);
  color: var(--brand-strong);
}

.timeline-content {
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(23, 32, 51, 0.06);
}

.timeline-content h3 {
  margin: 0 0 8px;
}

.timeline-content p {
  margin: 0;
  line-height: 1.8;
}

.download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

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

.faq-card-wide,
.contact-card-wide {
  width: 100%;
}

.faq-item + .faq-item {
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px dashed rgba(23, 32, 51, 0.08);
}

.faq-item h4 {
  margin: 0 0 8px;
  font-size: 17px;
}

.faq-item p {
  margin: 0;
  line-height: 1.8;
}

.contact-card {
  display: grid;
  gap: 22px;
}

.activate-grid {
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
}

.activate-panel,
.activate-side {
  display: grid;
  gap: 20px;
}

.activation-form {
  display: grid;
  gap: 18px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid rgba(23, 32, 51, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--text);
  font: inherit;
  padding: 14px 16px;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: rgba(46, 118, 212, 0.48);
  box-shadow: 0 0 0 4px rgba(46, 118, 212, 0.1);
}

.field textarea {
  resize: vertical;
  min-height: 140px;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.wechat-login-panel {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  margin-top: 18px;
}

.wechat-qr-placeholder {
  display: grid;
  place-items: center;
}

.qr-box {
  width: 200px;
  height: 200px;
  display: grid;
  place-items: center;
  border-radius: 24px;
  border: 1px dashed rgba(23, 32, 51, 0.14);
  background:
    linear-gradient(135deg, rgba(46, 118, 212, 0.06), rgba(63, 210, 167, 0.08));
  text-align: center;
  font-weight: 700;
  color: #2d3d5e;
}

.wechat-login-copy h3 {
  margin: 0 0 12px;
}

.cta {
  padding: 42px 0 72px;
}

.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 34px 36px;
  border-radius: 28px;
  background: linear-gradient(135deg, #18294a 0%, #23497d 100%);
  color: white;
  box-shadow: 0 26px 54px rgba(17, 42, 79, 0.24);
}

.cta-panel p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.site-footer {
  padding: 0 0 30px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid rgba(23, 32, 51, 0.08);
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.page-hero {
  padding: 60px 0 28px;
}

.page-hero p {
  max-width: 760px;
  margin: 0;
  line-height: 1.8;
  font-size: 17px;
}

.privacy-grid {
  margin-top: 30px;
}

.privacy-card h3 {
  margin-top: 0;
}

.log-list {
  display: grid;
  gap: 16px;
}

.log-entry {
  padding: 20px 22px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(23, 32, 51, 0.06);
  box-shadow: var(--shadow);
}

.log-entry time {
  display: inline-block;
  margin-bottom: 10px;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(46, 118, 212, 0.12);
  color: var(--brand-strong);
  font-size: 12px;
  font-weight: 700;
}

.log-entry h2 {
  margin: 0 0 8px;
  font-size: 24px;
}

.log-entry ul {
  margin: 14px 0 0;
  padding-left: 18px;
  color: #3d4962;
  line-height: 1.8;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 20px;
  border: 0;
  border-radius: 14px;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
  cursor: pointer;
}

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

.button-primary {
  color: white;
  background: linear-gradient(135deg, var(--brand) 0%, #3aa2ff 100%);
  box-shadow: 0 16px 28px rgba(46, 118, 212, 0.22);
}

.button-secondary {
  color: var(--text);
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(23, 32, 51, 0.1);
}

.button-dark {
  color: white;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.16);
}

.small-note {
  margin: 0;
  line-height: 1.7;
  font-size: 13px;
}

@media (max-width: 1024px) {
  .hero-grid,
  .story-grid,
  .feature-grid,
  .pricing-grid,
  .faq-grid,
  .privacy-grid,
  .activate-grid,
  .wechat-login-panel {
    grid-template-columns: 1fr;
  }

  .preview-bottom {
    grid-template-columns: 1fr;
  }

  .preview-bottom .card:last-child {
    grid-column: auto;
  }
}

@media (max-width: 760px) {
  .header-inner,
  .section-inner,
  .footer-inner {
    width: min(var(--max), calc(100% - 28px));
  }

  .header-inner {
    min-height: 72px;
    align-items: flex-start;
    padding: 14px 0;
    flex-direction: column;
  }

  .nav,
  .header-actions,
  .hero-actions,
  .download-buttons,
  .inline-links,
  .form-actions,
  .footer-inner,
  .cta-panel {
    width: 100%;
  }

  .nav,
  .header-actions,
  .footer-inner {
    justify-content: space-between;
  }

  .hero-copy,
  .hero-preview,
  .feature-card,
  .pricing-card,
  .faq-card,
  .simple-panel,
  .privacy-card {
    padding: 24px;
  }

  .preview-top {
    grid-template-columns: 1fr;
  }

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