:root {
  --bg: #ffffff;
  --bg-soft: #f5f8fb;
  --bg-tint: #eef7f6;
  --text: #172033;
  --muted: #5d6a7c;
  --line: #dbe3ec;
  --primary: #123a63;
  --primary-strong: #0b2948;
  --accent: #10847e;
  --accent-soft: #dff3f1;
  --warning-soft: #fff8e6;
  --shadow: 0 14px 38px rgba(18, 58, 99, 0.08);
  --radius: 8px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

img {
  max-width: 100%;
  height: auto;
}

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

a:hover {
  color: var(--accent);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(100% - 32px, var(--max));
  min-height: 64px;
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary-strong);
  font-weight: 800;
}

.brand-logo {
  width: 34px;
  height: 34px;
  border-radius: 7px;
  object-fit: contain;
}

.brand-mark {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #fff;
  background: var(--primary);
  border-radius: 7px;
  font-size: 15px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 15px;
}

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

.nav-links .nav-cta {
  color: #fff;
}

.section {
  padding: 72px 0;
}

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

.container {
  width: min(100% - 32px, var(--max));
  margin: 0 auto;
}

.hero {
  padding: 86px 0 68px;
  background: linear-gradient(180deg, #f7fbff 0%, #ffffff 78%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: 42px;
  align-items: center;
}

.hero-product-id {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: var(--primary-strong);
  font-weight: 800;
}

.hero-product-id img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-weight: 700;
}

h1,
h2,
h3 {
  color: var(--primary-strong);
  line-height: 1.22;
}

h1 {
  max-width: 780px;
  margin: 0 0 20px;
  font-size: clamp(34px, 5vw, 58px);
}

h2 {
  margin: 0 0 16px;
  font-size: 30px;
}

h3 {
  margin: 0 0 10px;
  font-size: 19px;
}

p {
  margin: 0 0 16px;
}

.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.trust-strip span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--primary-strong);
  background: #fff;
  font-size: 14px;
  font-weight: 700;
}

.hero-actions,
.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--primary);
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  color: #fff;
  background: var(--primary);
}

.button.primary:hover {
  color: #fff;
  background: var(--primary-strong);
}

.button.secondary {
  color: var(--primary);
  background: #fff;
}

.button.disabled,
button.button:disabled {
  color: #637084;
  border-color: var(--line);
  background: #eef2f6;
  cursor: not-allowed;
}

.product-panel {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-visual,
.image-card,
.showcase-item {
  margin: 0;
}

.hero-visual {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-visual img,
.feature-card img,
.image-card img,
.showcase-item img,
.preview-card img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-visual figcaption {
  padding: 14px 16px;
  color: var(--muted);
  font-size: 14px;
}

.panel-title {
  display: grid;
  gap: 3px;
  margin-bottom: 16px;
}

.panel-title strong {
  color: var(--primary-strong);
  font-size: 18px;
}

.panel-title span {
  color: var(--muted);
  font-size: 14px;
}

.panel-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 18px;
}

.panel-bar span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--line);
}

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

.file-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg-soft);
}

.tag {
  padding: 3px 8px;
  border-radius: 999px;
  color: var(--accent);
  background: var(--accent-soft);
  font-size: 12px;
  white-space: nowrap;
}

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

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

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

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

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

.card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.feature-card {
  position: relative;
  min-height: 172px;
  overflow: hidden;
  box-shadow: 0 10px 28px rgba(18, 58, 99, 0.05);
}

.feature-card img {
  aspect-ratio: 16 / 9;
  margin: -22px -22px 18px;
  width: calc(100% + 44px);
  max-width: none;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
}

.feature-card a {
  display: inline-flex;
  margin-top: 4px;
  font-weight: 800;
}

.feature-index {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--accent);
  font-weight: 800;
  font-size: 13px;
}

.card p,
.compare td,
.article-body li {
  color: var(--muted);
}

.compare {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.compare th,
.compare td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.compare th {
  color: var(--primary-strong);
  background: var(--bg-soft);
}

.notice {
  padding: 20px;
  border: 1px solid #f0dfac;
  border-radius: var(--radius);
  background: var(--warning-soft);
}

.showcase-list {
  display: grid;
  gap: 22px;
}

.showcase-item {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
  gap: 22px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.showcase-item img,
.image-card img,
.preview-card img {
  overflow: hidden;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.showcase-item figcaption,
.image-card figcaption {
  display: grid;
  gap: 8px;
  color: var(--muted);
}

.showcase-item strong {
  color: var(--primary-strong);
  font-size: 22px;
}

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

.image-card figcaption {
  padding-top: 12px;
}

.preview-card {
  display: grid;
  gap: 12px;
}

.preview-card img {
  margin-bottom: 4px;
}

.faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 22px;
  align-items: start;
}

.faq-layout .button-row {
  grid-column: 1 / -1;
}

.page-hero-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.page-hero-logo {
  width: 96px;
  height: 96px;
  object-fit: contain;
  border-radius: 18px;
  background: #fff;
  box-shadow: var(--shadow);
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  gap: 28px;
  align-items: center;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--primary-strong);
  color: #d9e6f2;
}

.cta-panel h2 {
  color: #ffffff;
}

.cta-panel p {
  color: #d9e6f2;
}

.cta-actions {
  display: grid;
  gap: 12px;
}

.cta-actions .button.secondary {
  border-color: rgba(255, 255, 255, 0.6);
  color: #ffffff;
  background: transparent;
}

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

.faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 18px 20px;
  border: 0;
  color: var(--primary-strong);
  background: transparent;
  font: inherit;
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.faq-question::after {
  content: "+";
  color: var(--accent);
  font-size: 22px;
  line-height: 1;
}

.faq-item.is-open .faq-question::after {
  content: "-";
}

.faq-answer {
  display: block;
  padding: 0 20px 18px;
  color: var(--muted);
}

.js-enabled .faq-answer {
  display: none;
}

.js-enabled .faq-item.is-open .faq-answer {
  display: block;
}

.page-hero {
  padding: 58px 0;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}

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

.meta-row {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.meta-row strong {
  color: var(--primary-strong);
}

.steps {
  counter-reset: step;
  display: grid;
  gap: 16px;
}

.step {
  position: relative;
  padding: 20px 20px 20px 62px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 20px;
  top: 22px;
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  color: #fff;
  background: var(--primary);
  border-radius: 50%;
  font-weight: 800;
}

.article-body {
  max-width: 820px;
}

.article-body h2 {
  margin-top: 34px;
}

.article-body ul {
  padding-left: 22px;
}

.site-footer {
  padding: 34px 0;
  border-top: 1px solid var(--line);
  background: var(--primary-strong);
  color: #d9e6f2;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 18px;
}

.site-footer a {
  color: #ffffff;
}

@media (max-width: 820px) {
  .nav-toggle {
    display: block;
  }

  .nav-links {
    position: absolute;
    left: 16px;
    right: 16px;
    top: 64px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    padding: 12px;
  }

  .hero-grid,
  .grid.three,
  .grid.two,
  .cta-panel,
  .showcase-item,
  .faq-layout {
    grid-template-columns: 1fr;
  }

  .page-hero-grid {
    align-items: flex-start;
  }

  .section {
    padding: 48px 0;
  }

  .hero {
    padding: 52px 0 44px;
  }

  .compare {
    display: block;
    overflow-x: auto;
  }
}

@media (max-width: 560px) {
  .nav-wrap,
  .container {
    width: min(100% - 24px, var(--max));
  }

  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 25px;
  }

  .hero-actions,
  .button-row {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .meta-row {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .page-hero-grid {
    flex-direction: column;
  }

  .showcase-item {
    padding: 14px;
  }
}

/* ===== 正式版授权咨询卡片 ===== */
.auth-card {
  border: 1px solid #e5e7eb;
  border-radius: 1.5rem;
  background: #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
  padding: 1.5rem;
  margin-top: 3rem;
}

.auth-card__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1.5rem;
  align-items: center;
}

.auth-card__text {
  text-align: left;
}

.auth-card__text h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #111827;
  margin-top: 0.5rem;
}

.auth-card__text p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: #4b5563;
  max-width: 32rem;
  margin: 0.5rem 0 0;
}

.auth-card__note {
  font-size: 0.8125rem;
  color: #6b7280;
  margin-top: 0.75rem;
}

.auth-card__qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.auth-card__qr img {
  width: 160px;
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: 1rem;
  border: 1px solid #e5e7eb;
}

.auth-card__qr p {
  font-size: 0.8125rem;
  color: #6b7280;
  margin-top: 0.5rem;
  text-align: center;
}

@media (max-width: 768px) {
  .auth-card {
    padding: 1.25rem;
  }

  .auth-card__inner {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .auth-card__text {
    text-align: center;
  }

  .auth-card__text p {
    margin: 0.5rem auto 0;
  }

  .auth-card__qr img {
    width: 160px;
  }
}

@media (min-width: 769px) {
  .auth-card {
    padding: 2rem;
  }

  .auth-card__qr img {
    width: 180px;
  }
}