:root {
  --bg: #f3efe7;
  --paper: #fffdf9;
  --paper-2: #f8f3ea;
  --ink: #231815;
  --muted: #6b5b54;
  --line: #ddcfc1;
  --accent: #c8542f;
  --accent-deep: #8c2f1a;
  --gold: #dca65a;
  --teal: #24595b;
  --shadow: 0 20px 50px rgba(69, 39, 24, 0.10);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(220, 166, 90, 0.24), transparent 28%),
    linear-gradient(180deg, #f7f2ea 0%, #f2ece3 45%, #efe8de 100%);
  line-height: 1.65;
}

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

button {
  font: inherit;
}

img, svg {
  display: block;
}

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

.site-shell {
  position: relative;
  overflow: hidden;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(16px);
  background: rgba(255, 252, 247, 0.82);
  border-bottom: 1px solid rgba(140, 47, 26, 0.10);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #ef7d44);
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 14px 30px rgba(200, 84, 47, 0.22);
}

.brand small {
  display: block;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.78rem;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  padding: 10px 16px;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 600;
}

.nav-list a.on {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  box-shadow: 0 10px 24px rgba(140, 47, 26, 0.22);
}

.nav-cta {
  padding: 11px 18px;
  border-radius: 999px;
  background: #fff;
  border: 1px solid rgba(36, 89, 91, 0.12);
  box-shadow: var(--shadow);
  font-weight: 700;
}

.hero-board {
  padding: 34px 0 24px;
}

.board-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 22px;
}

.panel, .hero-card, .quote-card, .stack-card, .soft-card, .table-wrap, .cta-ribbon, .footer-card {
  background: rgba(255, 253, 249, 0.92);
  border: 1px solid rgba(107, 91, 84, 0.12);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 34px;
  min-height: 560px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background:
    linear-gradient(135deg, rgba(255,255,255,0.92), rgba(255,247,239,0.94)),
    radial-gradient(circle at top right, rgba(220,166,90,0.32), transparent 30%);
}

.kicker, .section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 12px;
  border-radius: 999px;
  background: rgba(36, 89, 91, 0.08);
  color: var(--teal);
  font-size: 0.86rem;
  font-weight: 700;
}

.hero-card h1, .page-head h1 {
  margin: 18px 0 16px;
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 1.03;
  letter-spacing: -0.04em;
}

.hero-card p.lead, .page-head p.lead {
  margin: 0;
  max-width: 760px;
  color: var(--muted);
  font-size: 1.08rem;
}

.action-row, .mini-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.btn-primary, .btn-secondary, .btn-outline, .btn-soft, .btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 0 20px;
  border-radius: 16px;
  border: 0;
  cursor: pointer;
  font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.btn-primary, .btn-cta {
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  box-shadow: 0 16px 34px rgba(140, 47, 26, 0.24);
}

.btn-secondary {
  color: var(--ink);
  background: #fff;
  border: 1px solid rgba(107, 91, 84, 0.15);
}

.btn-outline, .btn-soft {
  background: transparent;
  color: var(--ink);
  border: 1px solid rgba(107, 91, 84, 0.18);
}

.btn-soft {
  background: rgba(255,255,255,0.72);
}

.btn-primary:hover, .btn-secondary:hover, .btn-outline:hover, .btn-soft:hover, .btn-cta:hover {
  transform: translateY(-2px);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: 30px;
}

.metric {
  padding: 16px;
  border-radius: 18px;
  background: var(--paper-2);
  border: 1px solid rgba(220, 166, 90, 0.22);
}

.metric strong {
  display: block;
  font-size: 1.5rem;
  line-height: 1.1;
}

.metric span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.92rem;
}

.stack-card {
  padding: 24px;
  display: grid;
  gap: 18px;
  align-content: start;
}

.stack-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 16px;
}

.stack-title {
  font-size: 1.24rem;
  font-weight: 800;
}

.stack-note {
  color: var(--muted);
  font-size: 0.94rem;
}

.workspace-list, .flow-list, .faq-list, .timeline, .tips-list {
  display: grid;
  gap: 14px;
}

.workspace-item, .flow-item, .timeline-item, .compare-card, .faq-item, .tip-card, .platform-card, .review-card, .insight-card, .guide-card, .req-card, .summary-card {
  border-radius: 20px;
  border: 1px solid rgba(107, 91, 84, 0.12);
  background: rgba(255,255,255,0.86);
}

.workspace-item {
  padding: 16px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 12px;
  align-items: center;
}

.workspace-badge, .dot-ico, .step-no {
  width: 42px;
  height: 42px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--teal), #3f8b8f);
}

.workspace-item strong, .flow-item strong, .review-card strong, .platform-card h3, .guide-card h3, .summary-card h3 {
  display: block;
  font-size: 1rem;
}

.workspace-item span, .flow-item p, .review-card p, .platform-card p, .guide-card p, .summary-card p, .soft-card p, .insight-card p, .req-card p {
  color: var(--muted);
}

.section {
  padding: 26px 0;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.section-head h2 {
  margin: 10px 0 0;
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  letter-spacing: -0.03em;
}

.grid-3, .grid-4, .review-grid, .platform-grid, .guide-grid, .req-grid, .summary-grid {
  display: grid;
  gap: 16px;
}

.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.review-grid { grid-template-columns: repeat(3, 1fr); }
.platform-grid { grid-template-columns: repeat(4, 1fr); }
.guide-grid { grid-template-columns: repeat(3, 1fr); }
.req-grid { grid-template-columns: repeat(4, 1fr); }
.summary-grid { grid-template-columns: repeat(3, 1fr); }

.insight-card, .platform-card, .review-card, .guide-card, .req-card, .summary-card, .compare-card {
  padding: 22px;
}

.insight-icon, .platform-icon, .review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
}

.insight-icon.c1, .platform-icon.p1, .review-avatar.r1 { background: rgba(200, 84, 47, 0.12); color: var(--accent); }
.insight-icon.c2, .platform-icon.p2, .review-avatar.r2 { background: rgba(36, 89, 91, 0.12); color: var(--teal); }
.insight-icon.c3, .platform-icon.p3, .review-avatar.r3 { background: rgba(220, 166, 90, 0.18); color: #9e6d1f; }
.insight-icon.c4, .platform-icon.p4, .review-avatar.r4 { background: rgba(107, 91, 84, 0.12); color: #6b5b54; }

.segment-bar {
  display: inline-flex;
  gap: 8px;
  padding: 8px;
  border-radius: 20px;
  background: rgba(255,255,255,0.9);
  border: 1px solid rgba(107, 91, 84, 0.1);
  box-shadow: var(--shadow);
  margin-bottom: 18px;
  flex-wrap: wrap;
}

.segment-btn {
  border: 0;
  background: transparent;
  border-radius: 14px;
  padding: 12px 16px;
  font-weight: 700;
  color: var(--muted);
  cursor: pointer;
}

.segment-btn.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fff;
}

.segment-panel {
  display: none;
}

.segment-panel.active {
  display: block;
}

.download-shell {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 18px;
}

.download-main, .download-side, .soft-card, .page-head, .cta-ribbon, .footer-card {
  padding: 26px;
}

.page-head {
  background: linear-gradient(135deg, rgba(255,255,255,0.92), rgba(255,245,238,0.92));
}

.meta-line {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.meta-pill {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(36, 89, 91, 0.08);
  color: var(--teal);
  font-size: 0.9rem;
  font-weight: 700;
}

.flow-item, .timeline-item {
  padding: 18px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
}

.step-no {
  background: linear-gradient(135deg, var(--accent), #f08a51);
}

.table-wrap {
  overflow: auto;
  padding: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

th, td {
  padding: 16px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--accent-deep);
  font-size: 0.95rem;
}

.cta-ribbon {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: linear-gradient(135deg, #2f1c14, #6a2c1b);
  color: #fff;
}

.faq-item {
  overflow: hidden;
}

.faq-q {
  width: 100%;
  border: 0;
  background: transparent;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  cursor: pointer;
  text-align: left;
  font-weight: 700;
  color: var(--ink);
}

.faq-a {
  display: none;
  padding: 0 20px 18px;
  color: var(--muted);
}

.faq-item.open .faq-a {
  display: block;
}

.faq-item.open .faq-q svg {
  transform: rotate(180deg);
}

.article-layout {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 18px;
}

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

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-cloud span {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(220,166,90,0.18);
  color: #8c5a14;
  font-size: 0.9rem;
  font-weight: 700;
}

.soft-card h3, .article-body h2 {
  margin: 0 0 12px;
}

.article-body {
  padding: 28px;
}

.article-body section + section {
  margin-top: 28px;
}

.article-body p + p {
  margin-top: 12px;
}

.article-body ul {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.footer-wrap {
  padding: 20px 0 44px;
}

.footer-card {
  text-align: center;
}

.footer-safe {
  color: var(--accent-deep);
  font-weight: 700;
  margin-bottom: 10px;
}

.footer-note {
  color: var(--muted);
  max-width: 920px;
  margin: 0 auto;
}

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

@media (max-width: 1080px) {
  .board-grid,
  .download-shell,
  .article-layout {
    grid-template-columns: 1fr;
  }

  .grid-4,
  .platform-grid,
  .req-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid-3,
  .review-grid,
  .guide-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .topbar-inner {
    min-height: auto;
    padding: 12px 0;
    flex-wrap: wrap;
  }

  .nav-list {
    width: 100%;
    justify-content: space-between;
  }

  .nav-cta {
    width: 100%;
    text-align: center;
  }

  .hero-card,
  .stack-card,
  .download-main,
  .download-side,
  .page-head,
  .soft-card,
  .article-body,
  .cta-ribbon,
  .footer-card {
    padding: 20px;
    border-radius: 22px;
  }

  .metrics,
  .grid-4,
  .platform-grid,
  .req-grid {
    grid-template-columns: 1fr;
  }

  .workspace-item,
  .flow-item,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .cta-ribbon,
  .section-head {
    align-items: start;
    flex-direction: column;
  }
}