:root {
  --ink: #171717;
  --muted: #65645f;
  --line: #dedbd2;
  --paper: #ffffff;
  --soft: #f4f5f1;
  --charcoal: #171613;
  --orange: #f26d2d;
  --blue: #1d7ec7;
  --green: #1f9f72;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  letter-spacing: 0;
}

img {
  display: block;
  max-width: 100%;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 32px;
  border-bottom: 1px solid rgba(23, 23, 23, 0.08);
  background: rgba(255, 255, 255, 0.94);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 6px;
  color: var(--white);
  background: var(--ink);
  font-size: 14px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  color: #4e4d49;
  font-size: 14px;
}

.nav a,
.header-cta {
  white-space: nowrap;
}

.nav a:hover,
.header-cta:hover {
  color: var(--orange);
}

.header-cta {
  padding: 9px 14px;
  border: 1px solid var(--ink);
  border-radius: 6px;
  font-weight: 700;
}

.hero {
  min-height: 86svh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  color: var(--white);
  background-image: url("assets/hero-collage.jpg");
  background-size: cover;
  background-position: center;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.24);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.22);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 96px 0 76px;
}

.eyebrow {
  margin: 0 0 16px;
  color: #ffb66a;
  font-size: 14px;
  font-weight: 800;
}

.eyebrow.dark {
  color: var(--orange);
}

.eyebrow.light {
  color: #8bdfc0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: 64px;
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 20px;
  font-size: 38px;
  line-height: 1.2;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 21px;
  line-height: 1.3;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 650px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 20px;
  line-height: 1.75;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.button.primary {
  color: var(--white);
  background: var(--orange);
}

.button.secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.08);
}

.button.secondary.dark {
  border-color: rgba(255, 255, 255, 0.5);
  background: transparent;
}

.button.full {
  width: 100%;
}

.hero-stats {
  display: grid;
  width: min(690px, 100%);
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 42px 0 0;
}

.hero-stats div {
  padding: 18px 18px 16px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.34);
}

.hero-stats dt {
  margin-bottom: 6px;
  color: #ffb66a;
  font-size: 28px;
  font-weight: 900;
}

.hero-stats dd {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 14px;
}

.section-inner {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
}

section:not(.hero) {
  padding: 86px 0;
}

.intro-band,
.package-section,
.faq-section {
  background: var(--soft);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading p:not(.eyebrow),
.copy-block p,
.price-copy p,
.contact-copy p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

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

.problem-card,
.package-grid article,
.case-card,
.price-panel,
.faq-list details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.problem-card,
.package-grid article {
  padding: 24px;
}

.problem-card .count {
  display: block;
  margin-bottom: 34px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.problem-card p,
.package-grid p,
.case-copy p,
.faq-list p,
.price-panel p,
.fit-lists li,
.refund {
  color: var(--muted);
  line-height: 1.75;
}

.two-column {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 48px;
  align-items: start;
}

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

.workflow-step {
  min-height: 150px;
  padding: 22px;
  border-left: 4px solid var(--green);
  background: #f7fbf8;
}

.workflow-step strong {
  display: block;
  margin-bottom: 16px;
  font-size: 24px;
}

.workflow-step span {
  color: var(--muted);
  line-height: 1.7;
}

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

.case-card {
  overflow: hidden;
}

.case-card.wide {
  grid-column: span 3;
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
}

.case-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #f7f7f5;
}

.case-card:not(.wide) img {
  aspect-ratio: 1 / 1;
}

.case-copy {
  padding: 22px;
}

.case-copy span {
  display: block;
  margin-bottom: 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

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

.package-grid article {
  min-height: 210px;
}

.fit-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
}

.fit-lists {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.fit-lists ul {
  margin: 0;
  padding-left: 20px;
}

.fit-lists li + li {
  margin-top: 12px;
}

.price-section {
  background: #fff8f2;
}

.price-layout {
  display: grid;
  grid-template-columns: 1fr 390px;
  gap: 56px;
  align-items: center;
}

.price-panel {
  padding: 28px;
  border-color: #efc7aa;
  background: var(--white);
}

.old-price {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--muted);
  text-decoration: line-through;
}

.price-panel strong {
  display: block;
  margin-bottom: 16px;
  color: var(--orange);
  font-size: 58px;
  line-height: 1;
}

.refund {
  margin: 16px 0 0;
  font-size: 14px;
}

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

.faq-list details {
  padding: 18px 22px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 800;
}

.faq-list p {
  margin: 14px 0 0;
}

.contact-section {
  color: var(--white);
  background: var(--charcoal);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 64px;
  align-items: center;
}

.contact-copy h2 {
  font-size: 44px;
}

.contact-copy p {
  color: rgba(255, 255, 255, 0.75);
}

.copy-tip {
  min-height: 28px;
  margin-top: 16px;
}

.qr-block {
  margin: 0;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

.qr-block img {
  border-radius: 6px;
}

.qr-block figcaption {
  margin-top: 12px;
  color: var(--muted);
  text-align: center;
  font-size: 14px;
}

.site-footer {
  display: flex;
  justify-content: center;
  gap: 18px;
  padding: 24px;
  color: #686866;
  background: #f6f6f3;
  font-size: 14px;
}

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    padding: 12px 18px;
  }

  .nav {
    display: none;
  }

  .header-cta {
    padding: 8px 12px;
  }

  .hero {
    min-height: 84svh;
    background-position: 58% center;
  }

  .hero-content {
    width: min(100% - 32px, 680px);
    padding: 74px 0 54px;
  }

  h1 {
    font-size: 42px;
  }

  h2 {
    font-size: 30px;
  }

  .hero-lead {
    font-size: 17px;
  }

  .problem-grid,
  .workflow,
  .case-grid,
  .package-grid,
  .fit-lists,
  .two-column,
  .fit-grid,
  .price-layout,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .case-card.wide {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .section-inner {
    width: min(100% - 32px, 680px);
  }

  section:not(.hero) {
    padding: 64px 0;
  }

  .price-layout,
  .contact-layout,
  .two-column,
  .fit-grid {
    gap: 30px;
  }

  .price-panel strong {
    font-size: 48px;
  }

  .contact-copy h2 {
    font-size: 34px;
    overflow-wrap: anywhere;
  }

  .site-footer {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }
}

@media (max-width: 520px) {
  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .hero-stats div {
    padding: 12px 8px;
  }

  .hero-stats dt {
    font-size: 22px;
  }

  .hero-stats dd {
    font-size: 12px;
  }

  .button {
    width: 100%;
  }

  .brand {
    font-size: 15px;
  }

  .header-cta {
    font-size: 14px;
  }
}