:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --panel-soft: #f8fafc;
  --line: #d9e0e7;
  --line-strong: #c5d0db;
  --text: #1f2d3d;
  --muted: #5c6b7a;
  --primary: #1f5fa9;
  --primary-dark: #17477e;
  --accent: #e8f1fb;
  --ok: #13795b;
  --warn: #b76e00;
  --danger: #b42318;
  --radius: 8px;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Microsoft YaHei UI", "PingFang SC", "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

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

img {
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.header-inner,
.page-section,
.site-footer-inner,
.subnav-inner {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-mark {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-transform: uppercase;
}

.brand-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.main-nav a {
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--muted);
  font-size: 14px;
}

.main-nav a:hover,
.main-nav a.active {
  background: var(--accent);
  color: var(--primary);
}

.hero {
  padding: 56px 0 28px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(280px, 0.9fr);
  gap: 24px;
  align-items: stretch;
}

.hero-card,
.panel,
.summary-card,
.feature-card,
.faq-item,
.contact-card,
.note-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 32px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
}

.hero h1,
.page-hero h1 {
  margin: 16px 0 12px;
  font-size: clamp(30px, 4vw, 42px);
  line-height: 1.18;
}

.hero p,
.page-hero p {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--primary);
  border-radius: 6px;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}

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

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

.button-secondary:hover {
  background: var(--accent);
  color: var(--primary-dark);
}

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

.summary-card {
  padding: 20px;
}

.summary-card h2,
.panel h2,
.panel h3,
.contact-card h2,
.note-card h2 {
  margin: 0 0 12px;
  font-size: 20px;
}

.summary-list,
.feature-list,
.plain-list,
.check-list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.feature-list li,
.plain-list li,
.check-list li {
  margin-bottom: 10px;
}

.site-main {
  padding-bottom: 60px;
}

.page-section {
  margin-top: 24px;
}

.page-section:first-of-type {
  margin-top: 0;
}

.section-head {
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 0 0 8px;
  font-size: 28px;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  padding: 22px;
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
}

.panel {
  padding: 24px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.stat-box {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
}

.stat-box strong {
  display: block;
  font-size: 26px;
  line-height: 1.1;
  margin-bottom: 6px;
}

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

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.step {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
}

.step h3 {
  margin: 12px 0 8px;
  font-size: 18px;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.page-hero {
  padding: 42px 0 6px;
}

.subnav {
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.subnav-inner {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  padding: 10px 0;
}

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

.subnav-inner a:hover {
  color: var(--primary);
}

.pricing-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
  font-size: 14px;
}

.pricing-table th,
.pricing-table td {
  padding: 12px 14px;
  border: 1px solid var(--line);
  vertical-align: top;
}

.pricing-table th {
  background: #eef4fb;
  color: var(--text);
  text-align: left;
}

.pricing-table td strong {
  font-size: 18px;
  color: var(--primary);
}

.pricing-group {
  margin-top: 18px;
}

.pricing-group:first-of-type {
  margin-top: 0;
}

.pricing-group h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.pricing-group p {
  margin: 0 0 10px;
  color: var(--muted);
}

.tag-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.tag {
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--primary);
  font-size: 13px;
}

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

.compare-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.compare-card h3 {
  margin: 0 0 12px;
  font-size: 20px;
}

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

.faq-item {
  padding: 20px 22px;
}

.faq-item h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.faq-item p {
  margin: 0;
  color: var(--muted);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, 0.85fr);
  gap: 16px;
}

.contact-card,
.note-card {
  padding: 24px;
}

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

.contact-row {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

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

.contact-row strong {
  display: block;
  margin-bottom: 4px;
}

.notice {
  margin-top: 12px;
  padding: 14px 16px;
  border-left: 4px solid var(--warn);
  background: #fff8eb;
  color: #7a4b00;
  border-radius: 6px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #fff;
}

.site-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0 28px;
  color: var(--muted);
  font-size: 14px;
}

.footer-links {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

@media (max-width: 980px) {
  .hero-grid,
  .contact-grid,
  .compare-grid {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 720px) {
  .header-inner {
    padding: 12px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .page-hero {
    padding-top: 32px;
  }

  .hero-card,
  .panel,
  .summary-card,
  .feature-card,
  .faq-item,
  .contact-card,
  .note-card {
    padding: 18px;
  }

  .card-grid,
  .stats-grid,
  .steps {
    grid-template-columns: 1fr;
  }

  .pricing-table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .site-footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}