* {
  box-sizing: border-box;
}

:root {
  --primary: rgb(70,139,223);
  --primary-dark: #2465b9;
  --primary-soft: #eaf4ff;
  --text: #10233f;
  --muted: #60728a;
  --line: #d9e6f5;
  --card: rgba(255,255,255,0.86);
  --white: #ffffff;
  --bg: #f6fbff;
  --shadow: 0 18px 46px rgba(40, 89, 150, 0.13);
  --radius: 22px;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(70,139,223,0.16), transparent 32rem),
    linear-gradient(180deg, #f2f8ff 0%, #ffffff 44%, #f6fbff 100%);
  line-height: 1.75;
  overflow-x: hidden;
}

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

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

.container {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(196,214,235,0.72);
}

.nav-wrap {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #0f2b52;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 12px;
}

.nav-toggle {
  display: none;
}

.nav-toggle-label {
  width: 44px;
  height: 44px;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--white);
  cursor: pointer;
}

.nav-toggle-label span {
  width: 20px;
  height: 2px;
  background: #23435f;
  border-radius: 2px;
}

.nav-menu {
  display: none;
  position: absolute;
  left: 16px;
  right: 16px;
  top: 76px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,0.96);
  box-shadow: var(--shadow);
  flex-direction: column;
  gap: 8px;
}

.nav-toggle:checked ~ .nav-menu {
  display: flex;
}

.nav-menu a {
  padding: 10px 12px;
  border-radius: 12px;
  color: #29445f;
  font-size: 15px;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--primary-dark);
  background: var(--primary-soft);
}

main {
  min-height: 65vh;
}

.section {
  padding: 56px 0;
}

.section.compact {
  padding: 38px 0;
}

.section-title {
  max-width: 760px;
  margin: 0 auto 28px;
  text-align: center;
}

.section-title.left {
  margin-left: 0;
  text-align: left;
}

.eyebrow,
.badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(70,139,223,0.11);
  color: var(--primary-dark);
  font-size: 13px;
  font-weight: 700;
  border: 1px solid rgba(70,139,223,0.18);
}

h1,
h2,
h3 {
  margin: 0 0 14px;
  line-height: 1.25;
  color: #10233f;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(32px, 7vw, 58px);
}

h2 {
  font-size: clamp(26px, 4.8vw, 40px);
}

h3 {
  font-size: 20px;
}

p {
  margin: 0 0 16px;
  color: var(--muted);
}

.hero {
  padding: 48px 0 36px;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}

.hero-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-copy h1 {
  margin-top: 16px;
  max-width: 720px;
}

.hero-copy p {
  font-size: 17px;
  max-width: 620px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 14px 0 26px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 11px;
  border-radius: 999px;
  background: rgba(255,255,255,0.76);
  border: 1px solid rgba(70,139,223,0.16);
  color: #335370;
  font-size: 13px;
  box-shadow: 0 8px 22px rgba(63,107,160,0.08);
}

.hero-visual {
  position: relative;
  min-height: 420px;
  border-radius: 32px;
  padding: 24px;
  overflow: hidden;
  background:
    linear-gradient(145deg, rgba(70,139,223,0.18), rgba(255,255,255,0.88)),
    radial-gradient(circle at 80% 12%, rgba(70,139,223,0.2), transparent 14rem);
  border: 1px solid rgba(144,178,217,0.35);
  box-shadow: var(--shadow);
}

.phone-frame {
  width: min(310px, 78vw);
  margin: 12px auto 0;
  padding: 12px;
  border-radius: 34px;
  background: rgba(255,255,255,0.92);
  box-shadow: 0 24px 58px rgba(44,91,148,0.18);
}

.phone-frame img {
  border-radius: 26px;
}

.float-card {
  position: absolute;
  background: rgba(255,255,255,0.92);
  border: 1px solid rgba(70,139,223,0.14);
  box-shadow: 0 16px 40px rgba(31,72,122,0.13);
  border-radius: 18px;
  padding: 13px 15px;
  color: #17334f;
}

.float-card strong {
  display: block;
  font-size: 14px;
  margin-bottom: 2px;
}

.float-card span {
  color: var(--muted);
  font-size: 12px;
}

.status-card {
  left: 18px;
  top: 22px;
}

.key-card {
  right: 20px;
  top: 84px;
}

.verify-card {
  left: 24px;
  bottom: 76px;
}

.protect-card {
  right: 24px;
  bottom: 24px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  border: 1px solid rgba(70,139,223,0.28);
  box-shadow: 0 14px 28px rgba(70,139,223,0.26);
  cursor: pointer;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.download-btn:hover {
  transform: translateY(-2px);
  background: var(--primary-dark);
  box-shadow: 0 18px 36px rgba(70,139,223,0.34);
}

.trust-grid,
.category-grid,
.feature-grid,
.scenario-grid,
.article-grid,
.faq-grid,
.info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.trust-item,
.category-card,
.feature-card,
.scenario-card,
.info-card,
.faq-item,
.notice-card,
.step-card,
.article-card {
  border: 1px solid rgba(161,189,222,0.48);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: 0 12px 32px rgba(35,82,138,0.08);
}

.trust-item {
  padding: 20px;
}

.trust-item strong {
  display: block;
  color: #15385c;
  margin-bottom: 4px;
  font-size: 18px;
}

.category-card,
.feature-card,
.scenario-card,
.info-card,
.article-card {
  padding: 22px;
}

.category-card {
  min-height: 176px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.category-card:hover,
.article-card:hover {
  border-color: rgba(70,139,223,0.52);
  transform: translateY(-3px);
  transition: .18s ease;
}

.card-link {
  color: var(--primary-dark);
  font-weight: 800;
  margin-top: 12px;
  display: inline-flex;
}

.icon-dot {
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-weight: 900;
  margin-bottom: 14px;
}

.split-layout,
.security-layout,
.download-layout,
.about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

.panel {
  padding: 24px;
  border-radius: 28px;
  background: linear-gradient(145deg, rgba(255,255,255,0.92), rgba(234,244,255,0.92));
  border: 1px solid rgba(140,174,216,0.42);
  box-shadow: var(--shadow);
}

.panel-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.panel-list div,
.check-list li {
  padding: 13px 14px;
  border-radius: 16px;
  background: rgba(255,255,255,0.72);
  border: 1px solid rgba(70,139,223,0.12);
  color: #29445f;
}

.check-list {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
  display: grid;
  gap: 10px;
}

.check-list li::before {
  content: "✓";
  color: var(--primary-dark);
  font-weight: 900;
  margin-right: 8px;
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  counter-reset: step;
}

.step-card {
  position: relative;
  padding: 24px;
  overflow: hidden;
}

.step-card::before {
  counter-increment: step;
  content: "0" counter(step);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 15px;
  background: var(--primary);
  color: #fff;
  font-weight: 900;
  margin-bottom: 14px;
}

.faq-item {
  padding: 20px;
}

.faq-item h3 {
  font-size: 17px;
}

.cta-section {
  margin: 48px 0 18px;
  padding: 34px 22px;
  text-align: center;
  border-radius: 30px;
  background:
    linear-gradient(135deg, rgba(70,139,223,0.14), rgba(255,255,255,0.94)),
    radial-gradient(circle at top right, rgba(70,139,223,0.18), transparent 18rem);
  border: 1px solid rgba(70,139,223,0.18);
  box-shadow: var(--shadow);
}

.cta-section p {
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.page-hero {
  padding: 54px 0 28px;
}

.page-hero .container {
  display: grid;
  gap: 14px;
}

.page-hero p {
  max-width: 780px;
  font-size: 17px;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
}

.article-main {
  padding: 26px;
  border: 1px solid rgba(161,189,222,0.48);
  border-radius: 28px;
  background: rgba(255,255,255,0.9);
  box-shadow: 0 14px 38px rgba(35,82,138,0.08);
}

.article-main h2 {
  margin-top: 22px;
  font-size: 25px;
}

.article-side {
  display: grid;
  gap: 16px;
}

.notice-card {
  padding: 20px;
  background: linear-gradient(145deg, #ffffff, #f0f7ff);
}

.notice-card strong {
  display: block;
  margin-bottom: 8px;
  color: #14365a;
}

.guide-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.guide-row {
  padding: 16px;
  border-radius: 18px;
  border: 1px solid rgba(70,139,223,0.16);
  background: rgba(255,255,255,0.78);
}

.guide-row strong {
  display: block;
  color: #14365a;
}

.download-card {
  padding: 28px;
  border-radius: 28px;
  background: rgba(255,255,255,0.9);
  border: 1px solid rgba(161,189,222,0.48);
  box-shadow: var(--shadow);
}

.table-like {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.table-like div {
  display: grid;
  gap: 6px;
  padding: 14px;
  border-radius: 16px;
  background: rgba(244,249,255,0.9);
  border: 1px solid rgba(70,139,223,0.12);
}

.kpi-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 18px;
}

.kpi {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255,255,255,0.78);
  border: 1px solid rgba(70,139,223,0.14);
}

.kpi strong {
  display: block;
  color: var(--primary-dark);
  font-size: 22px;
}

.site-footer {
  margin-top: 46px;
  padding: 46px 0 24px;
  background: #f0f7ff;
  border-top: 1px solid rgba(165,193,225,0.6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.footer-brand img {
  width: 36px;
  height: 36px;
  border-radius: 12px;
}

.site-footer h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.site-footer a {
  display: block;
  color: #526984;
  margin: 6px 0;
}

.site-footer a:hover {
  color: var(--primary-dark);
}

.footer-bottom {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(169,195,226,0.66);
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: #657892;
  font-size: 13px;
}

@media (min-width: 680px) {
  .trust-grid,
  .category-grid,
  .feature-grid,
  .scenario-grid,
  .article-grid,
  .faq-grid,
  .info-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .table-like div {
    grid-template-columns: 150px 1fr;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .container {
    width: min(1160px, calc(100% - 56px));
  }

  .nav-toggle-label {
    display: none;
  }

  .nav-menu {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    padding: 0;
    border: 0;
    border-radius: 0;
    background: transparent;
    box-shadow: none;
    gap: 4px;
  }

  .nav-menu a {
    font-size: 14px;
  }

  .hero {
    padding: 72px 0 52px;
  }

  .hero-layout {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 54px;
  }

  .hero-visual {
    min-height: 520px;
  }

  .section {
    padding: 74px 0;
  }

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

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

  .split-layout,
  .security-layout,
  .download-layout,
  .about-layout {
    grid-template-columns: 1fr 1fr;
    gap: 44px;
  }

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

  .article-layout {
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 28px;
  }

  .article-main {
    padding: 34px;
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (min-width: 1120px) {
  .hero-copy p,
  .page-hero p {
    font-size: 18px;
  }

  .phone-frame {
    width: 330px;
  }
}

@media (max-width: 420px) {
  .container {
    width: min(100% - 24px, 1120px);
  }

  .hero-visual {
    min-height: 390px;
    padding: 16px;
  }

  .float-card {
    padding: 10px 11px;
    border-radius: 15px;
  }

  .key-card {
    right: 10px;
  }

  .verify-card {
    left: 12px;
  }

  .protect-card {
    right: 12px;
  }

  .download-btn {
    width: 100%;
  }

  .article-main,
  .panel,
  .download-card {
    padding: 20px;
  }
}