:root {
  --bg: #f7f4ef;
  --surface: #ffffff;
  --ink: #0f172a;
  --muted: #475569;
  --primary: #c2410c;
  --secondary: #1d4ed8;
  --accent: #0f766e;
  --line: #e2e8f0;
  --shadow: 0 24px 60px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
}

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

img {
  max-width: 100%;
}

.wrap {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.topnav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(247, 244, 239, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
  position: relative;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 1px;
}

.brand-title {
  font-size: 18px;
}

.brand-sub {
  font-size: 12px;
  color: var(--muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav-link {
  font-size: 14px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  transition: all 0.2s ease;
}

.nav-link.active,
.nav-link:hover {
  color: var(--ink);
  background: rgba(194, 65, 12, 0.12);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 8px;
  cursor: pointer;
}

.btn {
  border: none;
  cursor: pointer;
  padding: 12px 20px;
  border-radius: 12px;
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 12px 24px rgba(194, 65, 12, 0.2);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}

.btn-soft {
  background: #fff;
  border: 1px solid var(--line);
  color: var(--ink);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.12);
}

.hero {
  padding: 110px 0 80px;
  background: linear-gradient(120deg, #fff7ed 0%, #eff6ff 45%, #f0fdfa 100%);
}

.hero-inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
  align-items: center;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.12);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}

.hero-title {
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.2;
  margin: 16px 0 12px;
}

.hero-sub {
  color: var(--muted);
  font-size: 17px;
}

.hero-note {
  margin-top: 14px;
  font-weight: 600;
  color: var(--secondary);
}

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

.hero-stats {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  background: var(--surface);
  border-radius: 16px;
  padding: 16px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.stat-card strong {
  font-size: 20px;
}

.stat-card span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-top: 4px;
}

.hero-board {
  background: #fff;
  border-radius: 24px;
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.board-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-weight: 700;
  margin-bottom: 16px;
}

.board-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.board-card {
  background: #f8fafc;
  border-radius: 16px;
  padding: 14px;
  border: 1px solid #e2e8f0;
}

.board-card h4 {
  margin: 8px 0 4px;
  font-size: 15px;
}

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

.board-chart {
  margin-top: 16px;
  background: #fff7ed;
  border-radius: 18px;
  padding: 14px;
  border: 1px dashed rgba(194, 65, 12, 0.3);
}

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

.chart-row:last-child {
  margin-bottom: 0;
}

.chart-label {
  font-size: 12px;
  color: var(--muted);
  width: 64px;
}

.chart-track {
  flex: 1;
  height: 8px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.08);
  overflow: hidden;
}

.chart-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.sec {
  padding: 90px 0;
}

.sec-head {
  text-align: center;
  margin-bottom: 40px;
}

.sec-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary);
  font-weight: 700;
  font-size: 13px;
}

.sec-title {
  font-size: clamp(26px, 3vw, 36px);
  margin: 10px 0;
}

.sec-sub {
  color: var(--muted);
  max-width: 720px;
  margin: 0 auto;
}

.feat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feat-card {
  background: var(--surface);
  border-radius: 18px;
  padding: 20px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

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

.feat-card p {
  color: var(--muted);
  font-size: 14px;
}

.story-list {
  margin-top: 46px;
  display: grid;
  gap: 28px;
}

.story-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  align-items: center;
  background: #fff;
  border-radius: 24px;
  padding: 24px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.story-row.reverse .story-info {
  order: 2;
}

.story-row.reverse .story-visual {
  order: 1;
}

.story-info h4 {
  font-size: 20px;
  margin-bottom: 8px;
}

.story-info p {
  color: var(--muted);
  font-size: 14px;
}

.story-tags {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.story-tag {
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(29, 78, 216, 0.12);
  color: var(--secondary);
  font-size: 12px;
  font-weight: 600;
}

.story-visual {
  background: #f1f5f9;
  border-radius: 18px;
  padding: 20px;
  border: 1px dashed rgba(15, 23, 42, 0.15);
}

.visual-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.visual-card {
  background: #fff;
  border-radius: 14px;
  padding: 12px;
  border: 1px solid var(--line);
  font-size: 12px;
}

.plat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.plat-card {
  background: #fff;
  border-radius: 20px;
  padding: 22px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.plat-card h3 {
  font-size: 18px;
}

.plat-meta {
  font-size: 12px;
  color: var(--muted);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.review-card {
  background: #fff;
  border-radius: 20px;
  padding: 20px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.review-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.review-name {
  font-weight: 700;
}

.stars {
  display: flex;
  gap: 2px;
}

.review-card p {
  font-size: 14px;
  color: var(--muted);
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 30px;
}

.security-card {
  background: #fff;
  border-radius: 18px;
  padding: 18px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.security-card h4 {
  margin: 10px 0 6px;
  font-size: 16px;
}

.security-card p {
  font-size: 13px;
  color: var(--muted);
}

.cmp-wrap {
  background: #fff;
  border-radius: 20px;
  padding: 24px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  min-width: 620px;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 12px 10px;
  text-align: left;
}

th {
  color: var(--muted);
  font-weight: 600;
  background: #f8fafc;
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.price-card {
  background: #fff;
  border-radius: 24px;
  padding: 24px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.price-card.featured {
  border: 2px solid var(--primary);
  transform: translateY(-8px);
}

.price-tag {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(194, 65, 12, 0.12);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  align-self: flex-start;
}

.price-value {
  font-size: 26px;
  font-weight: 700;
}

.price-list {
  list-style: none;
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

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

.faq-item {
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--line);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.faq-q {
  padding: 16px 18px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
}

.faq-a {
  padding: 0 18px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: var(--muted);
  font-size: 14px;
}

.faq-a p {
  padding-bottom: 16px;
}

.faq-item.open .faq-a {
  max-height: 280px;
}

.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--line);
  text-align: center;
  color: var(--muted);
  font-size: 14px;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

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

  .feat-grid,
  .plat-grid,
  .review-grid,
  .security-grid,
  .price-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .story-row {
    grid-template-columns: 1fr;
  }

  .story-row.reverse .story-info,
  .story-row.reverse .story-visual {
    order: initial;
  }
}

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

  .nav-links {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    background: #fff;
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--line);
    display: none;
  }

  .nav-links.show {
    display: flex;
  }
}

@media (max-width: 640px) {
  .hero {
    padding-top: 96px;
  }

  .feat-grid,
  .plat-grid,
  .review-grid,
  .security-grid,
  .price-grid {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
  }

  .stat-card {
    padding: 14px;
  }
}