:root {
  --bg: #f5efe6;
  --bg-soft: #f0e7dc;
  --ink: #1c1712;
  --ink-soft: rgba(28, 23, 18, 0.72);
  --accent: #cb4b26;
  --accent-deep: #8f2b14;
  --accent-soft: #f6c8b5;
  --panel: rgba(255, 250, 245, 0.84);
  --panel-strong: rgba(255, 248, 240, 0.96);
  --line: rgba(28, 23, 18, 0.1);
  --shadow: 0 24px 80px rgba(55, 31, 17, 0.14);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --max-width: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(203, 75, 38, 0.18), transparent 32%),
    radial-gradient(circle at 85% 20%, rgba(143, 43, 20, 0.12), transparent 24%),
    linear-gradient(180deg, #fbf6f0 0%, var(--bg) 48%, #f9f3ea 100%);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  line-height: 1.6;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.2;
  background-image:
    linear-gradient(rgba(28, 23, 18, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 23, 18, 0.04) 1px, transparent 1px);
  background-size: 22px 22px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.35), transparent 88%);
}

.page-shell {
  width: min(calc(100% - 28px), var(--max-width));
  margin: 0 auto;
  padding-bottom: 80px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 16px 0;
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.brand-badge,
.section-kicker,
.card-tag,
.plan-tag,
.panel-label,
.case-name {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(203, 75, 38, 0.18);
  background: rgba(255, 242, 233, 0.92);
  color: var(--accent-deep);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-name {
  font-family: "STZhongsong", "SimSun", serif;
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.topnav {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.menu-toggle {
  display: none;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 250, 245, 0.9);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  border-radius: 999px;
  background: var(--ink);
  transition: transform 180ms ease, opacity 180ms ease;
}

.topnav a,
.button {
  text-decoration: none;
  color: inherit;
}

.topnav a {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 250, 245, 0.72);
  border: 1px solid var(--line);
  font-size: 0.92rem;
}

.section {
  margin-top: 26px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(255, 252, 248, 0.86), rgba(255, 249, 243, 0.7));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.section-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 28px;
  min-height: calc(100vh - 48px);
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 0.94rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--accent-deep);
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.08;
}

h1,
h2 {
  font-family: "STZhongsong", "Songti SC", serif;
}

h1 {
  max-width: 10ch;
  font-size: clamp(2.8rem, 7vw, 5.7rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

h3 {
  font-size: clamp(1.15rem, 2vw, 1.5rem);
}

.hero-lead,
.section-heading p,
.case-copy p,
.tool-card p,
.timeline-step p,
.plan-footnote,
.closing-columns p,
.after-note p {
  color: var(--ink-soft);
}

.hero-lead {
  max-width: 60ch;
  margin: 18px 0 0;
  font-size: 1.05rem;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin: 28px 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 20px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.button:hover,
.topnav a:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), #d8683f);
  color: #fff7f0;
  box-shadow: 0 18px 32px rgba(203, 75, 38, 0.22);
}

.button-secondary {
  border: 1px solid rgba(143, 43, 20, 0.18);
  background: rgba(255, 248, 240, 0.9);
}

.hero-metrics,
.market-stats,
.closing-ribbon {
  display: grid;
  gap: 12px;
}

.hero-metrics {
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  align-items: stretch;
}

.market-stats,
.closing-ribbon {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.hero-metrics article,
.market-stats article {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 247, 239, 0.9);
  border: 1px solid rgba(203, 75, 38, 0.12);
}

.hero-metrics article {
  min-height: 124px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.hero-metrics strong,
.market-stats strong {
  display: block;
  font-size: clamp(1.4rem, 4vw, 2.4rem);
  color: var(--accent-deep);
}

.hero-metrics span,
.market-stats span {
  display: block;
  margin-top: 6px;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.contrast-board {
  position: relative;
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 16px;
  padding: 18px;
  border-radius: calc(var(--radius-xl) + 4px);
  background:
    linear-gradient(160deg, rgba(27, 21, 16, 0.98), rgba(53, 32, 18, 0.86)),
    radial-gradient(circle at top right, rgba(203, 75, 38, 0.36), transparent 30%);
  color: #fff8f2;
  min-height: 100%;
}

.contrast-panel {
  border-radius: 28px;
  overflow: hidden;
}

.contrast-before {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01)),
    repeating-linear-gradient(-25deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.04) 10px, transparent 10px, transparent 20px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.contrast-before h2 {
  margin-top: 18px;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
}

.contrast-before ul {
  margin: 18px 0 0;
  padding-left: 18px;
  color: rgba(255, 248, 242, 0.82);
}

.problem-cloud {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.problem-cloud span {
  padding: 10px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.9rem;
}

.contrast-after {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 22px;
  background: rgba(255, 250, 245, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.contrast-after img,
.case-media img,
.gallery-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.contrast-after img {
  border-radius: 22px;
  min-height: 420px;
}

.after-note {
  padding: 0 4px 2px;
}

.section-heading {
  display: grid;
  gap: 14px;
}

.identity-cards,
.tool-grid,
.case-grid,
.gallery-grid {
  display: grid;
  gap: 18px;
}

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

.identity-card,
.tool-card,
.timeline-step,
.addon-card,
.market-compare article,
.gallery-card,
.closing-panel {
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--panel);
}

.identity-card h3,
.tool-card h3,
.timeline-step h3 {
  margin-top: 14px;
}

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

.case-card {
  display: grid;
  grid-template-rows: 260px auto;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(28, 23, 18, 0.08);
  background: var(--panel-strong);
}

.case-copy {
  padding: 22px;
}

.case-copy h3 {
  margin-top: 16px;
}

.case-copy ul,
.plan-card ul {
  margin: 14px 0 0;
  padding-left: 18px;
  color: var(--ink-soft);
}

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

.tool-card {
  min-height: 230px;
  background:
    linear-gradient(180deg, rgba(255, 248, 240, 0.95), rgba(255, 246, 238, 0.82));
}

.tool-index {
  display: inline-block;
  font-family: "STZhongsong", serif;
  color: var(--accent);
  font-size: 1.6rem;
}

.tool-card strong {
  display: block;
  margin-top: 16px;
}

.plan-wrap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.plan-card {
  padding: 24px;
  border-radius: 28px;
  background: var(--panel-strong);
  border: 1px solid rgba(28, 23, 18, 0.08);
}

.plan-card.accent {
  background:
    linear-gradient(145deg, rgba(203, 75, 38, 0.98), rgba(166, 58, 28, 0.96));
  color: #fff6ef;
}

.plan-card.accent .plan-tag {
  background: rgba(255, 255, 255, 0.16);
  color: #fff5eb;
  border-color: rgba(255, 255, 255, 0.18);
}

.plan-card.accent ul,
.plan-card.accent .plan-footnote {
  color: rgba(255, 246, 238, 0.84);
}

.plan-price {
  margin: 14px 0 4px;
  font-size: clamp(1.45rem, 3vw, 2.2rem);
  font-weight: 800;
}

.addon-card {
  grid-column: 1 / -1;
}

.addon-list {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.addon-list span,
.closing-ribbon span {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 242, 233, 0.9);
  border: 1px solid rgba(203, 75, 38, 0.14);
}

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

.timeline-step span {
  display: inline-flex;
  margin-bottom: 12px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(203, 75, 38, 0.1);
  color: var(--accent-deep);
  font-size: 0.84rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.market-panel {
  display: grid;
  gap: 18px;
}

.market-compare {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.market-compare .highlight {
  background:
    linear-gradient(145deg, rgba(203, 75, 38, 0.98), rgba(168, 61, 31, 0.92));
  color: #fff8f2;
}

.market-compare .highlight p {
  color: rgba(255, 248, 242, 0.86);
}

.gallery-grid {
  grid-template-columns: 1.15fr 0.85fr 0.9fr 1.1fr;
}

.gallery-card {
  padding: 0;
  min-height: 260px;
  overflow: hidden;
}

.closing-panel {
  position: relative;
  background:
    linear-gradient(135deg, rgba(255, 248, 240, 0.98), rgba(250, 239, 229, 0.9));
}

.closing-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 22px 0 26px;
}

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

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 650ms ease, transform 650ms ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1100px) {
  .hero,
  .contrast-board,
  .identity-cards,
  .tool-grid,
  .plan-wrap,
  .timeline,
  .market-compare,
  .gallery-grid,
  .closing-columns,
  .market-stats,
  .closing-ribbon {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(calc(100% - 18px), var(--max-width));
  }

  .topbar {
    gap: 12px;
    padding: 12px 0 10px;
    align-items: center;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .brand-lockup {
    flex: 1 1 auto;
    min-width: 0;
    justify-content: flex-start;
    gap: 8px;
  }

  .brand-badge,
  .brand-name {
    white-space: nowrap;
  }

  .menu-toggle {
    display: none;
    flex: 0 0 auto;
  }

  .topnav {
    display: none;
  }

  .section {
    padding: 20px;
    border-radius: 24px;
  }

  .hero,
  .contrast-board,
  .identity-cards,
  .tool-grid,
  .plan-wrap,
  .timeline,
  .market-compare,
  .gallery-grid,
  .closing-columns,
  .hero-metrics,
  .market-stats,
  .closing-ribbon {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  h1 {
    max-width: none;
    font-size: clamp(2.4rem, 13vw, 4rem);
  }

  h2 {
    font-size: clamp(1.7rem, 8vw, 2.5rem);
  }

  .button {
    width: 100%;
  }

  .case-card {
    grid-template-rows: 220px auto;
  }

  .contrast-after img {
    min-height: 300px;
  }
}