:root {
  --ink: #2d211c;
  --muted: #7d6a5e;
  --paper: #fbf6ee;
  --paper-deep: #f1e4d4;
  --chestnut: #6f3926;
  --chestnut-dark: #3d2319;
  --orange: #d9773c;
  --gold: #efb15c;
  --line: #e7d8c8;
  --white: #fffdf9;
  --shadow: 0 18px 46px rgba(71, 43, 27, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.75;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(61, 35, 25, .1);
  background: rgba(251, 246, 238, .94);
  backdrop-filter: blur(14px);
}

.nav-wrap,
.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.nav-wrap {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--chestnut-dark);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: .02em;
  white-space: nowrap;
}

.brand img { width: 42px; height: 42px; border-radius: 13px; }

.nav-links { display: flex; align-items: center; gap: 5px; }

.nav-links a {
  padding: 9px 14px;
  color: var(--muted);
  border-radius: 9px;
  font-size: 14px;
  transition: .2s ease;
}

.nav-links a:hover,
.nav-links a.active { color: var(--chestnut-dark); background: var(--paper-deep); }

.nav-download { color: var(--white) !important; background: var(--chestnut) !important; }

.hero {
  position: relative;
  overflow: hidden;
  padding: 74px 0 66px;
  background: linear-gradient(118deg, #f6e4cc 0%, #fbf6ee 56%, #f8e8dc 100%);
}

.hero::after {
  position: absolute;
  right: -110px;
  bottom: -200px;
  width: 470px;
  height: 470px;
  border: 1px solid rgba(201, 107, 53, .2);
  border-radius: 50%;
  content: "";
}

.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.1fr .9fr; gap: 54px; align-items: center; }

.eyebrow { margin: 0 0 13px; color: var(--orange); font-size: 13px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }

h1, h2, h3 { margin: 0; color: var(--chestnut-dark); line-height: 1.25; }

h1 { font-size: clamp(38px, 6vw, 68px); letter-spacing: -.04em; }
h2 { font-size: clamp(27px, 4vw, 40px); letter-spacing: -.03em; }
h3 { font-size: 19px; }

.hero-copy > p:not(.eyebrow) { max-width: 620px; margin: 23px 0 28px; color: #644c3e; font-size: 17px; }

.button-row { display: flex; flex-wrap: wrap; gap: 13px; align-items: center; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.button:hover { transform: translateY(-2px); box-shadow: 0 9px 18px rgba(61, 35, 25, .14); }
.button-primary { color: var(--white); background: var(--chestnut); }
.button-secondary { color: var(--chestnut); border-color: var(--line); background: rgba(255, 253, 249, .72); }

.hero-meta { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 26px; color: var(--muted); font-size: 13px; }
.hero-meta strong { display: block; color: var(--chestnut-dark); font-size: 18px; }

.phone-stack { position: relative; min-height: 420px; }
.phone-card { position: absolute; width: 180px; overflow: hidden; border: 7px solid #38241b; border-radius: 25px; background: #38241b; box-shadow: var(--shadow); }
.phone-card img { width: 100%; }
.phone-card.one { top: 4px; left: 15%; transform: rotate(-7deg); }
.phone-card.two { top: 74px; right: 10%; transform: rotate(7deg); }
.phone-card.three { right: 34%; bottom: -10px; transform: rotate(-1deg); }

.section { padding: 88px 0; }
.section-tint { background: var(--paper-deep); }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 34px; }
.section-head p { max-width: 520px; margin: 0; color: var(--muted); }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.feature-card { min-height: 210px; padding: 25px; border: 1px solid var(--line); border-radius: 12px; background: var(--white); }
.feature-icon { display: grid; width: 42px; height: 42px; place-items: center; margin-bottom: 24px; color: var(--chestnut-dark); border-radius: 12px; background: #f6dfc4; font-size: 20px; }
.feature-card p { margin: 11px 0 0; color: var(--muted); font-size: 14px; }

.gallery-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; align-items: start; }
.gallery-item { overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: var(--white); }
.gallery-item img { width: 100%; max-width: 400px; margin: 0 auto; }
.gallery-item figcaption { padding: 12px 14px 15px; color: var(--muted); font-size: 13px; }

.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin: 28px 0 0; border: 1px solid var(--line); background: var(--line); }
.stat { padding: 22px 16px; background: var(--white); }
.stat strong { display: block; color: var(--chestnut-dark); font-size: 27px; }
.stat span { color: var(--muted); font-size: 13px; }

.path-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.path-card { display: flex; min-height: 190px; flex-direction: column; justify-content: space-between; padding: 24px; border-radius: 12px; color: var(--white); background: var(--chestnut-dark); }
.path-card:nth-child(2) { background: var(--orange); }
.path-card:nth-child(3) { color: var(--chestnut-dark); background: var(--gold); }
.path-card p { margin: 9px 0 19px; font-size: 14px; opacity: .82; }
.path-card a { font-weight: 800; text-decoration: underline; text-underline-offset: 4px; }

.story { display: grid; grid-template-columns: .85fr 1.15fr; gap: 46px; align-items: start; }
.story p { margin: 0 0 17px; color: var(--muted); }
.story-note { padding: 24px; border-left: 4px solid var(--orange); background: #fff9f2; color: #654d40; }

.article { max-width: 820px; margin: 0 auto; }
.article h1 { margin-bottom: 19px; font-size: clamp(34px, 5vw, 52px); }
.article-lead { margin: 0 0 36px; color: var(--muted); font-size: 17px; }
.article h2 { margin: 45px 0 15px; font-size: 29px; }
.article h3 { margin: 28px 0 7px; font-size: 19px; }
.article p { margin: 0 0 16px; color: #5f4a3e; }
.article ul { margin: 0 0 18px; padding-left: 22px; color: #5f4a3e; }
.article li { margin: 5px 0; }
.steps { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin: 26px 0; }
.step { padding: 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--white); }
.step b { display: block; margin-bottom: 6px; color: var(--orange); }
.faq-list { display: grid; gap: 10px; }
.faq-list details { border: 1px solid var(--line); border-radius: 10px; background: var(--white); }
.faq-list summary { padding: 17px 19px; cursor: pointer; color: var(--chestnut-dark); font-weight: 800; }
.faq-list details p { padding: 0 19px 18px; margin: 0; }

.site-footer { padding: 34px 0 40px; border-top: 1px solid var(--line); background: #f2e7da; }
.footer-grid { display: flex; justify-content: space-between; gap: 28px; }
.footer-grid p { max-width: 570px; margin: 10px 0 0; color: var(--muted); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; align-content: start; gap: 16px; color: var(--muted); font-size: 13px; }
.copyright { margin-top: 28px; color: #9a8375; font-size: 12px; }

@media (max-width: 850px) {
  .hero-grid, .story { grid-template-columns: 1fr; }
  .phone-stack { min-height: 390px; max-width: 520px; margin: 0 auto; width: 100%; }
  .feature-grid, .path-grid { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  .nav-wrap, .container { width: min(100% - 28px, 1120px); }
  .nav-wrap { min-height: 66px; align-items: flex-start; padding: 11px 0; flex-direction: column; gap: 7px; }
  .nav-links { width: 100%; overflow-x: auto; }
  .nav-links a { padding: 6px 9px; white-space: nowrap; }
  .hero { padding: 52px 0 48px; }
  .hero-copy > p:not(.eyebrow) { font-size: 15px; }
  .phone-card { width: 145px; }
  .phone-stack { min-height: 328px; }
  .feature-grid, .path-grid, .gallery-grid, .steps { grid-template-columns: 1fr; }
  .stat-strip { grid-template-columns: 1fr 1fr; }
  .section { padding: 62px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 12px; }
  .footer-grid { display: block; }
  .footer-links { margin-top: 20px; }
}