:root {
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: #e5e5ea;
  --paper: #f5f5f7;
  --white: #ffffff;
  --sage: #3a8a8a;
  --sage-dark: #1a3a3a;
  --gold: #c9a96e;
  --gold-soft: #fef9ec;
  --mist: #e8f5f5;
  --shadow: 0 18px 45px rgba(26, 58, 58, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
.container { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.eyebrow {
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}
.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 250, 246, .92);
  border-bottom: 1px solid rgba(223, 230, 225, .85);
  backdrop-filter: blur(18px);
}
.nav-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: .04em;
}
.brand span { color: var(--muted); font-size: 12px; font-weight: 500; letter-spacing: .08em; }
.nav-links { display: flex; align-items: center; gap: 24px; color: var(--muted); font-size: 14px; }
.nav-links a:hover { color: var(--sage-dark); }
.nav-links a.active { color: var(--sage-dark); font-weight: 700; }
.nav-phone {
  color: var(--white);
  background: var(--sage-dark);
  padding: 10px 16px;
  border-radius: 6px;
  font-weight: 700;
}
.hero {
  min-height: calc(100vh - 72px);
  display: grid;
  align-items: center;
  padding: 44px 0 58px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 42px;
  align-items: center;
}
.hero-copy h1 {
  margin: 12px 0 18px;
  max-width: 720px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: 0;
}
.hero-copy p {
  max-width: 630px;
  color: var(--muted);
  font-size: 18px;
  margin: 0 0 28px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-weight: 800;
  font-size: 15px;
  cursor: pointer;
}
.btn-primary { background: var(--sage-dark); color: var(--white); }
.btn-primary:hover { background: var(--sage); }
.btn-secondary { border-color: var(--line); background: rgba(255,255,255,.7); color: var(--sage-dark); }
.btn-secondary:hover { background: var(--white); }
.hero-card {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  min-height: 620px;
  box-shadow: var(--shadow);
  background: var(--mist);
}
.hero-card img { width: 100%; height: 620px; object-fit: cover; }
.section { padding: 76px 0; }
.section.alt { background: var(--white); }
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 28px;
}
.section-head h2, .article-hero h1 {
  margin: 6px 0 0;
  font-size: clamp(28px, 3.8vw, 46px);
  line-height: 1.12;
  letter-spacing: 0;
}
.section-head p { max-width: 540px; color: var(--muted); margin: 0; }
.split {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 34px;
  align-items: center;
}
.media-tile { overflow: hidden; border-radius: 8px; background: var(--mist); box-shadow: var(--shadow); }
.media-tile img { width: 100%; height: 430px; object-fit: cover; }
.article-hero {
  padding: 58px 0 34px;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.article-hero p { max-width: 760px; color: var(--muted); font-size: 17px; }
.toc {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
  margin-top: 26px;
}
.toc a {
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--sage-dark);
  font-size: 14px;
  font-weight: 700;
  text-align: center;
}
.toc a:hover { background: var(--white); box-shadow: var(--shadow); }
.article-body { display: grid; gap: 18px; }
.article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 26px;
}
.article h2 { margin: 4px 0 12px; font-size: 26px; line-height: 1.25; }
.article p { color: var(--muted); margin: 0 0 12px; }
.article ul { color: var(--muted); margin: 12px 0 0; padding-left: 20px; }
.article li { margin: 6px 0; }
.service-grid, .article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.service-card, .article-card {
  min-height: 100%;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  transition: transform .2s ease, box-shadow .2s ease;
}
.service-card:hover, .article-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.service-card h3 { margin: 14px 0 8px; font-size: 19px; }
.article-card h3 { margin: 0 0 6px; font-size: 18px; line-height: 1.35; }
.article-card p, .service-card p { margin: 0; color: var(--muted); font-size: 14px; }
.service-card .tag, .article-tag {
  display: inline-block;
  color: var(--sage-dark);
  background: var(--mist);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 700;
}
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.step {
  padding: 18px 14px;
  border-top: 3px solid var(--gold);
  background: var(--white);
  border-radius: 0 0 8px 8px;
  min-height: 140px;
}
.step strong { display: block; color: var(--sage-dark); margin-bottom: 8px; }
.step p { color: var(--muted); margin: 0; font-size: 13px; }
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
}
.info-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all .2s;
}
.info-item:hover { box-shadow: 0 12px 32px rgba(26,58,58,.12); }
.info-item .info-label { font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.info-item .info-value { font-size: 16px; font-weight: 700; color: var(--sage-dark); }
.contact-panel {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 24px;
  padding: 28px;
  border-radius: 8px;
  background: var(--sage-dark);
  color: var(--white);
}
.contact-panel h2 { margin: 0 0 12px; font-size: clamp(28px, 4vw, 44px); line-height: 1.12; }
.contact-panel p { color: rgba(255,255,255,.78); margin: 0 0 18px; }
.contact-box {
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
}
.contact-box p { color: rgba(255,255,255,.85); font-size: 14px; font-weight: 700; }
.qr { width: 160px; height: 160px; object-fit: cover; border-radius: 8px; background: var(--white); padding: 6px; margin: 12px auto 0; }
.footer { padding: 28px 0; color: var(--muted); font-size: 13px; border-top: 1px solid var(--line); text-align: center; }
.feature-list { display: grid; gap: 14px; }
.feature {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255,255,255,.72);
}
.mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 6px;
  color: var(--sage-dark);
  background: var(--gold-soft);
  font-weight: 900;
}
.feature h3 { margin: 0 0 6px; font-size: 18px; line-height: 1.35; }
.feature p { margin: 0; color: var(--muted); font-size: 14px; }
.price-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
.price-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  padding: 18px 14px;
  text-align: center;
  transition: transform .2s ease, box-shadow .2s ease;
}
.price-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.price-card.selected { border-color: var(--gold); box-shadow: 0 0 0 1px var(--gold); }
.price-card h3 { margin: 0 0 6px; font-size: 15px; color: var(--sage-dark); line-height: 1.3; }
.price-amount { font-size: 26px; font-weight: 800; color: var(--sage-dark); margin: 8px 0; }
.price-amount small { font-size: 13px; font-weight: 500; color: var(--muted); }
.price-card ul { list-style: none; padding: 0; margin: 12px 0; color: var(--muted); font-size: 12px; }
.price-card li { padding: 5px 0; border-bottom: 1px solid var(--line); }
.price-card li:last-child { border-bottom: 0; }
.price-card .btn { width: 100%; margin-top: 10px; font-size: 13px; }
/* 数量选择器 */
.qty-row { display: flex; align-items: center; justify-content: space-between; margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); }
.qty-label { font-size: 12px; color: var(--muted); }
.qty-ctrl { display: flex; align-items: center; gap: 6px; }
.qty-btn { width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--line); background: var(--white); font-size: 16px; cursor: pointer; color: var(--sage-dark); display: grid; place-items: center; transition: all .15s; line-height: 1; padding: 0; }
.qty-btn:hover { background: var(--sage-dark); color: white; border-color: var(--sage-dark); }
.qty-num { font-size: 15px; font-weight: 700; color: var(--sage-dark); min-width: 22px; text-align: center; }
/* 购物车栏 */
.cart-bar { position: sticky; bottom: 0; background: var(--sage-dark); color: white; display: flex; align-items: center; justify-content: space-between; padding: 14px 24px; border-radius: 12px 12px 0 0; margin-top: 20px; box-shadow: 0 -4px 20px rgba(0,0,0,0.15); z-index: 100; }
.cart-info { display: flex; gap: 20px; align-items: center; }
.cart-label { font-size: 14px; opacity: 0.9; }
.cart-total { font-size: 14px; }
.cart-total strong { font-size: 20px; margin-left: 4px; }
.cart-btn { background: var(--gold); color: var(--sage-dark); border: none; padding: 12px 32px; border-radius: 24px; font-size: 16px; font-weight: 700; cursor: pointer; transition: all .2s; white-space: nowrap; }
.cart-btn:hover { background: #d4b87a; transform: scale(1.03); }
.notice {
  padding: 16px;
  border-left: 4px solid var(--gold);
  border-radius: 0 8px 8px 0;
  background: var(--gold-soft);
  color: #5d4827;
  margin: 16px 0;
}
.benefit-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.benefit-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
}
.benefit-item .benefit-icon { font-size: 32px; margin-bottom: 10px; }
.benefit-item h4 { margin: 0 0 6px; font-size: 16px; color: var(--sage-dark); }
.benefit-item p { margin: 0; font-size: 13px; color: var(--muted); }
@media (max-width: 900px) {
  .nav-inner { min-height: auto; padding: 14px 0; align-items: flex-start; }
  .nav-links { justify-content: flex-end; flex-wrap: wrap; gap: 10px 14px; font-size: 13px; }
  .nav-phone { padding: 7px 10px; }
  .hero { min-height: auto; }
  .hero-grid, .split, .contact-panel, .article-layout { grid-template-columns: 1fr; }
  .hero-card, .hero-card img { min-height: 440px; height: 440px; }
  .service-grid, .article-grid, .price-grid { grid-template-columns: repeat(2, 1fr); }
  .steps, .toc { grid-template-columns: repeat(3, 1fr); }
  .benefit-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 620px) {
  .container { width: min(100% - 28px, 1160px); }
  .brand { font-size: 15px; }
  .brand span { display: none; }
  .nav-inner { gap: 10px; }
  .hero-copy p { font-size: 16px; }
  .section { padding: 54px 0; }
  .section-head { display: block; }
  .section-head p { margin-top: 10px; }
  .service-grid, .article-grid, .price-grid, .steps, .toc, .benefit-grid { grid-template-columns: 1fr; }
  .media-tile img { height: 300px; }
  .btn { width: 100%; }
  .article { padding: 20px; }
}