:root {
  --blue-900: #0b315a;
  --blue-800: #0e4d82;
  --blue-700: #1268a9;
  --blue-100: #e8f4fb;
  --green-600: #61a934;
  --green-100: #edf8e8;
  --ink: #142130;
  --muted: #5d6d7e;
  --line: #dce7ee;
  --surface: #ffffff;
  --soft: #f5f9fc;
  --shadow: 0 18px 48px rgba(11, 49, 90, 0.14);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.7;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  padding: 0 7vw;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(220, 231, 238, 0.9);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--blue-900);
  font-weight: 800;
  font-size: 20px;
}

.brand img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav a {
  padding: 10px 14px;
  border-radius: 8px;
  color: #29455f;
  font-size: 15px;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a.active {
  background: var(--blue-100);
  color: var(--blue-800);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--blue-800);
  border-radius: 8px;
  padding: 8px 12px;
  font-weight: 700;
}

.hero,
.page-hero,
.download-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.92fr);
  gap: clamp(28px, 5vw, 76px);
  align-items: center;
  padding: 78px 7vw 64px;
  overflow: hidden;
}

.hero {
  min-height: calc(100vh - 74px);
  background:
    linear-gradient(135deg, rgba(232, 244, 251, 0.95), rgba(255, 255, 255, 0.78) 44%, rgba(237, 248, 232, 0.72)),
    radial-gradient(circle at 74% 18%, rgba(97, 169, 52, 0.16), transparent 32%);
}

.hero h1,
.page-hero h1,
.download-hero h1 {
  margin: 0 0 22px;
  max-width: 760px;
  color: var(--blue-900);
  font-size: clamp(38px, 6vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}

.page-hero h1,
.download-hero h1 {
  font-size: clamp(34px, 5vw, 58px);
}

.hero p,
.page-hero p,
.download-hero p {
  max-width: 680px;
  margin: 0 0 30px;
  color: #385169;
  font-size: clamp(17px, 2vw, 21px);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 800;
  font-size: 15px;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--blue-700), var(--blue-900));
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(18, 104, 169, 0.28);
}

.btn-secondary {
  background: #ffffff;
  border-color: var(--line);
  color: var(--blue-800);
}

.btn-light {
  background: #ffffff;
  color: var(--blue-900);
}

.btn-full {
  width: 100%;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 640px;
  margin: 0;
}

.hero-stats div {
  padding: 16px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(220, 231, 238, 0.9);
  border-radius: 8px;
}

.hero-stats dt {
  color: var(--blue-900);
  font-size: 24px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.hero-visual,
.page-hero img {
  border-radius: 8px;
  background: #102031;
  box-shadow: var(--shadow);
}

.hero-visual {
  padding: 12px;
}

.hero-visual img,
.page-hero img {
  width: 100%;
  border-radius: 6px;
}

.page-hero {
  background: linear-gradient(135deg, var(--soft), #ffffff 58%, var(--green-100));
  border-bottom: 1px solid var(--line);
}

.page-hero.compact {
  display: block;
  max-width: none;
}

.download-hero {
  grid-template-columns: minmax(0, 1fr) 280px;
  background: linear-gradient(135deg, var(--blue-900), var(--blue-700));
  color: #ffffff;
}

.download-hero h1,
.download-hero p {
  color: #ffffff;
}

.version-card {
  padding: 26px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 8px;
}

.version-card span {
  color: #cae6f8;
  font-weight: 700;
}

.version-card strong {
  display: block;
  margin: 8px 0;
  font-size: 52px;
  line-height: 1;
}

.version-card p {
  margin: 0;
  font-size: 15px;
}

.section {
  padding: 72px 7vw;
}

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

.section-heading {
  max-width: 760px;
  margin: 0 auto 36px;
  text-align: center;
}

.section-heading p,
.section-label {
  margin: 0 0 10px;
  color: var(--green-600);
  font-weight: 900;
}

.section-heading h2,
.split-section h2,
.media-block h2,
.workflow h2,
.qr-downloads h2,
.notice-list h2 {
  margin: 0;
  color: var(--blue-900);
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
}

.section-lead {
  color: var(--muted);
  font-size: 18px;
}

.feature-strip,
.feature-matrix,
.scenario-grid,
.download-grid,
.testimonials {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-strip article,
.feature-matrix article,
.scenario-grid article,
.download-grid article,
.testimonials blockquote,
.notice-list,
.faq-list details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 32px rgba(11, 49, 90, 0.07);
}

.feature-strip article,
.feature-matrix article,
.scenario-grid article,
.download-grid article,
.testimonials blockquote {
  margin: 0;
  padding: 26px;
}

.icon-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  border-radius: 8px;
  background: var(--blue-100);
  color: var(--blue-800);
  font-size: 22px;
  font-weight: 900;
}

.feature-strip h3,
.feature-matrix h2,
.scenario-grid h2,
.download-grid h2 {
  margin: 0 0 10px;
  color: var(--blue-900);
  font-size: 22px;
  line-height: 1.3;
}

.feature-strip p,
.feature-matrix p,
.scenario-grid p,
.download-grid p,
.testimonials p,
.faq-list p {
  margin: 0;
  color: var(--muted);
}

.split-section,
.media-block,
.qr-downloads {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 48px;
  align-items: center;
}

.scenario-list {
  display: grid;
  gap: 14px;
}

.scenario-list article {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 18px;
  padding: 18px 20px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.scenario-list strong {
  color: var(--blue-900);
}

.scenario-list span {
  color: var(--muted);
}

.text-link {
  display: inline-flex;
  margin-top: 18px;
  color: var(--blue-700);
  font-weight: 900;
}

.text-link::after {
  content: "→";
  margin-left: 7px;
}

.proof-section {
  background: linear-gradient(180deg, #ffffff, var(--soft));
}

.testimonials blockquote p {
  color: var(--ink);
  font-size: 18px;
}

.testimonials cite {
  display: block;
  margin-top: 18px;
  color: var(--muted);
  font-style: normal;
  font-weight: 700;
}

.download-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: 0 7vw 72px;
  padding: 34px;
  background: linear-gradient(135deg, var(--blue-800), var(--green-600));
  color: #ffffff;
  border-radius: 8px;
}

.download-band h2,
.download-band p {
  margin: 0;
}

.download-band p {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.86);
}

.media-block {
  background: #ffffff;
}

.media-block.reverse img {
  order: 2;
}

.media-block img {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.check-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  margin: 10px 0;
  padding-left: 28px;
  color: #354b61;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--green-600);
}

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

.scenario-grid span {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--green-600);
  font-weight: 900;
}

.workflow {
  background: var(--soft);
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  padding: 28px 24px 24px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.steps li::before {
  counter-increment: step;
  content: counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  margin-bottom: 16px;
  border-radius: 8px;
  background: var(--blue-700);
  color: #ffffff;
  font-weight: 900;
}

.steps strong,
.steps span {
  display: block;
}

.steps strong {
  color: var(--blue-900);
  font-size: 19px;
}

.steps span {
  margin-top: 8px;
  color: var(--muted);
}

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

.download-grid article {
  display: flex;
  flex-direction: column;
  min-height: 260px;
}

.download-grid .btn {
  margin-top: auto;
}

.qr-downloads {
  background: var(--soft);
}

.qr-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.qr-grid figure {
  margin: 0;
  padding: 18px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  text-align: center;
}

.qr-grid img {
  width: 148px;
  height: 148px;
  margin: 0 auto 10px;
}

.qr-grid figcaption {
  color: var(--blue-900);
  font-weight: 900;
}

.direct-links {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin: 18px 0 0;
}

.direct-links a {
  padding: 10px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--blue-800);
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}

.notice-list {
  margin: 72px 7vw;
  padding: 32px;
}

.faq-list {
  display: grid;
  gap: 14px;
  max-width: 960px;
  margin: 0 auto;
}

.faq-list details {
  padding: 20px 24px;
}

.faq-list summary {
  color: var(--blue-900);
  cursor: pointer;
  font-size: 19px;
  font-weight: 900;
}

.faq-list p {
  margin-top: 12px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 28px;
  padding: 34px 7vw;
  background: #0c243d;
  color: #ffffff;
}

.site-footer p {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.72);
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.site-footer a {
  color: rgba(255, 255, 255, 0.84);
  font-weight: 700;
}

.download-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(8, 24, 40, 0.62);
}

.download-modal[hidden] {
  display: none;
}

.modal-panel {
  position: relative;
  width: min(560px, 100%);
  padding: 30px;
  background: #ffffff;
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.26);
}

.modal-panel h2 {
  margin: 0 38px 10px 0;
  color: var(--blue-900);
  font-size: 28px;
  line-height: 1.24;
}

.modal-panel p {
  margin: 0 0 20px;
  color: var(--muted);
}

.modal-close {
  position: absolute;
  top: 18px;
  right: 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: var(--blue-900);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 980px) {
  .hero,
  .page-hero,
  .download-hero,
  .split-section,
  .media-block,
  .qr-downloads {
    grid-template-columns: 1fr;
  }

  .feature-strip,
  .feature-matrix,
  .download-grid,
  .steps,
  .testimonials {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .media-block.reverse img {
    order: 0;
  }
}

@media (max-width: 720px) {
  .site-header {
    flex-wrap: wrap;
    min-height: auto;
    padding: 14px 5vw;
  }

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

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding-top: 12px;
  }

  .site-nav.open {
    display: flex;
  }

  .hero,
  .page-hero,
  .download-hero,
  .section {
    padding: 48px 5vw;
  }

  .hero {
    min-height: auto;
  }

  .hero-stats,
  .feature-strip,
  .feature-matrix,
  .scenario-grid,
  .download-grid,
  .steps,
  .testimonials,
  .qr-grid,
  .direct-links {
    grid-template-columns: 1fr;
  }

  .scenario-list article {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .download-band,
  .site-footer {
    margin: 0;
    border-radius: 0;
    flex-direction: column;
    align-items: flex-start;
  }

  .notice-list {
    margin: 48px 5vw;
  }

  .modal-panel {
    padding: 24px;
  }
}