:root {
  --sht-primary: #1f7af8;
  --sht-primary-dark: #145bd7;
  --sht-accent: #12b981;
  --sht-ink: #172033;
  --sht-muted: #64748b;
  --sht-line: #e5eaf2;
  --sht-soft: #f5f8fc;
  --sht-warm: #fff7ed;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--sht-ink);
  font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background: #ffffff;
}

a {
  text-decoration: none;
}

.site-navbar {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
}

.navbar-brand img {
  width: 34px;
  height: 34px;
  object-fit: contain;
}

.brand-word {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--sht-ink);
  letter-spacing: 0.02em;
}

.mobile-header-actions .btn {
  min-width: 48px;
  padding: 5px 10px;
  font-size: 0.86rem;
  font-weight: 800;
}

.nav-link {
  color: #475569;
  padding: 8px 14px !important;
  border-radius: 10px;
  font-size: 1.02rem;
  font-weight: 800;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: var(--sht-primary);
  background: rgba(31, 122, 248, 0.1);
}

.btn-primary {
  --bs-btn-bg: var(--sht-primary);
  --bs-btn-border-color: var(--sht-primary);
  --bs-btn-hover-bg: var(--sht-primary-dark);
  --bs-btn-hover-border-color: var(--sht-primary-dark);
  box-shadow: 0 12px 24px rgba(31, 122, 248, 0.22);
}

.btn-outline-primary {
  --bs-btn-color: var(--sht-primary);
  --bs-btn-border-color: rgba(31, 122, 248, 0.35);
  --bs-btn-hover-bg: var(--sht-primary);
  --bs-btn-hover-border-color: var(--sht-primary);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 132px 0 72px;
  background:
    radial-gradient(circle at 85% 18%, rgba(18, 185, 129, 0.18), transparent 28%),
    linear-gradient(135deg, #eef6ff 0%, #ffffff 45%, #f8fbff 100%);
}

.hero::after {
  content: "";
  position: absolute;
  right: -10vw;
  bottom: -28vw;
  width: 56vw;
  height: 56vw;
  border-radius: 999px;
  background: rgba(31, 122, 248, 0.08);
}

.hero .container {
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  color: #0f766e;
  background: rgba(20, 184, 166, 0.12);
  border: 1px solid rgba(20, 184, 166, 0.18);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
}

.hero-title {
  margin: 22px 0 18px;
  font-size: clamp(2.2rem, 5vw, 4.6rem);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: 0;
}

.hero-text {
  max-width: 650px;
  color: var(--sht-muted);
  font-size: 1.15rem;
  line-height: 1.9;
}

.hero-card {
  padding: 12px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(226, 232, 240, 0.95);
  border-radius: 20px;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
}

.hero-card img,
.screen-card img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  display: block;
}

.metric-strip {
  margin-top: 34px;
}

.metric {
  padding: 18px;
  border: 1px solid var(--sht-line);
  border-radius: 14px;
  background: #fff;
}

.metric strong {
  display: block;
  color: var(--sht-primary);
  font-size: 1.7rem;
  line-height: 1;
}

.metric span {
  display: block;
  margin-top: 8px;
  color: var(--sht-muted);
  font-size: 0.95rem;
}

.metric-card {
  min-height: 118px;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px 28px;
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.06);
}

.metric-card .metric-icon {
  width: 66px;
  height: 66px;
  flex: 0 0 66px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin: 0;
  color: var(--sht-primary);
  background: rgba(31, 122, 248, 0.1);
  border-radius: 12px;
}

.metric-card .metric-icon svg {
  width: 32px;
  height: 32px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.metric-card > span:last-child {
  display: block;
  margin: 0;
}

.metric-card strong {
  color: #0f172a;
  font-size: 2rem;
}

.section {
  padding: 86px 0;
}

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

.section-title {
  max-width: 820px;
  margin: 0 auto 44px;
  text-align: center;
}

.section-title h1,
.section-title h2 {
  margin: 0 0 14px;
  font-weight: 900;
  letter-spacing: 0;
}

.section-title p {
  margin: 0;
  color: var(--sht-muted);
  line-height: 1.8;
  font-size: 1.08rem;
}

.feature-card,
.solution-card,
.price-card,
.case-card,
.about-card,
.step-card,
.advantage-card,
.mini-card {
  height: 100%;
  background: #fff;
  border: 1px solid var(--sht-line);
  border-radius: 14px;
  box-shadow: 0 16px 36px rgba(15, 23, 42, 0.06);
}

.feature-card,
.solution-card,
.about-card,
.step-card,
.advantage-card,
.mini-card {
  padding: 26px;
}

.icon-box {
  width: 46px;
  height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--sht-primary);
  background: rgba(31, 122, 248, 0.1);
  border-radius: 12px;
  font-size: 1.35rem;
  margin-bottom: 18px;
}

.accent-icon {
  color: var(--sht-accent);
  background: rgba(18, 185, 129, 0.12);
}

.card-title {
  font-weight: 800;
  margin-bottom: 12px;
}

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

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

.check-list li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: #475569;
  line-height: 1.65;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--sht-accent);
  font-weight: 900;
}

.step-number {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: var(--sht-primary);
  border-radius: 999px;
  font-weight: 900;
  margin-bottom: 18px;
}

.screen-card {
  padding: 14px;
  background: #ffffff;
  border: 1px solid var(--sht-line);
  border-radius: 18px;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.1);
}

.product-showcase {
  display: grid;
  gap: 52px;
}

.showcase-item {
  padding: 34px;
  background: #fff;
  border: 1px solid var(--sht-line);
  border-radius: 20px;
  box-shadow: 0 20px 54px rgba(15, 23, 42, 0.08);
}

.nav-pills .nav-link {
  border: 1px solid var(--sht-line);
  background: #fff;
  color: #475569;
  margin: 6px;
  border-radius: 999px;
}

.nav-pills .nav-link.active {
  color: #fff;
  background: var(--sht-primary);
  border-color: var(--sht-primary);
}

.price-card {
  position: relative;
  overflow: hidden;
  padding: 34px;
}

.price-card.featured {
  border: 2px solid rgba(31, 122, 248, 0.55);
}

.tag {
  display: inline-flex;
  padding: 5px 10px;
  color: #b45309;
  background: #fff7ed;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 800;
}

.price {
  margin: 20px 0;
}

.price .old {
  color: #94a3b8;
  text-decoration: line-through;
}

.price .num {
  display: inline-block;
  color: var(--sht-primary);
  font-size: 3rem;
  font-weight: 900;
  line-height: 1;
}

.case-tag {
  display: inline-flex;
  margin-bottom: 16px;
  padding: 6px 16px;
  color: #fff;
  background: var(--sht-primary);
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 800;
  box-shadow: 0 8px 18px rgba(31, 122, 248, 0.22);
}

.quote {
  position: relative;
  margin: 26px 0 22px;
  padding: 30px 30px 28px;
  color: #475569;
  background: #f5f8fc;
  border-radius: 14px;
  line-height: 1.85;
}

.quote::before {
  content: "\"";
  position: absolute;
  top: 6px;
  left: 18px;
  color: rgba(31, 122, 248, 0.2);
  font-family: Georgia, serif;
  font-size: 4rem;
  line-height: 1;
}

.case-card {
  border-radius: 16px;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 54px rgba(15, 23, 42, 0.1);
}

.case-card h3 {
  margin-bottom: 22px;
}

.case-card .d-flex {
  padding: 18px 20px;
  background: linear-gradient(145deg, #ffffff, #f5f8fc);
  border: 1px solid var(--sht-line);
  border-radius: 12px;
}

.case-card .d-flex strong {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
  color: var(--sht-ink);
  font-size: 0.98rem;
}

.case-card .d-flex strong::first-letter {
  color: var(--sht-primary);
}

.case-author {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--sht-line);
}

.author-avatar {
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  background: linear-gradient(135deg, var(--sht-primary), var(--sht-accent));
  border-radius: 999px;
  font-weight: 900;
}

.case-author strong,
.case-author small {
  display: block;
}

.case-author small {
  margin-top: 2px;
  color: var(--sht-muted);
}

.cta-band {
  padding: 52px;
  color: #fff;
  background: linear-gradient(135deg, #155bd7, #1f7af8 58%, #12b981);
  border-radius: 20px;
}

.footer {
  padding: 58px 0 22px;
  color: rgba(255, 255, 255, 0.72);
  background: #101827;
}

.footer h5,
.footer .brand-word {
  color: #fff;
}

.footer a {
  color: rgba(255, 255, 255, 0.72);
}

.footer a:hover {
  color: #fff;
}

.footer .btn-light {
  color: var(--sht-primary);
}

.footer .btn-outline-light {
  color: #fff;
}

.qrcode {
  width: 104px;
  height: 104px;
  border-radius: 10px;
  background: #fff;
  padding: 6px;
}

.page-hero {
  padding: 128px 0 58px;
  background: linear-gradient(135deg, #f0f7ff, #ffffff);
}

@media (max-width: 991.98px) {
  .hero {
    padding-top: 110px;
  }

  .hero-card {
    margin-top: 34px;
  }

  .section {
    padding: 62px 0;
  }

  .cta-band {
    padding: 34px 24px;
  }
}

@media (max-width: 575.98px) {
  .hero-title {
    font-size: 2.25rem;
  }

  .hero-text {
    font-size: 1rem;
  }

  .price-card {
    padding: 26px;
  }
}