/* ---------- Hero ---------- */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 96px 28px 112px;
  text-align: center;
}

.hero h1 {
  font-size: clamp(44px, 9vw, 104px);
  font-weight: 600;
  letter-spacing: -0.04em;
}

.hero-sub {
  max-width: 620px;
  margin: 30px auto 0;
  color: var(--muted);
  font-size: 17px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: 42px;
}

.btn {
  display: inline-block;
  padding: 14px 30px;
  font-size: 14px;
  letter-spacing: 0.06em;
  border: 1px solid var(--primary);
  transition: all 0.22s ease;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent);
  border-color: var(--accent);
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
}

.btn-ghost:hover {
  background: var(--primary);
  color: #fff;
}

/* ---------- 三栏卖点 ---------- */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px 96px;
}

.pillar {
  padding: 34px 30px;
  background: var(--surface);
  border-top: 2px solid var(--primary);
}

.pillar h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.pillar p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- 服务项目 ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.service {
  padding: 34px 32px;
  background: var(--bg);
  border: 1px solid var(--line);
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.service:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
}

.service h3 {
  margin-bottom: 10px;
  font-size: 21px;
}

.service p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- 服务流程 ---------- */
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.steps li {
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.steps h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.steps p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

/* ---------- 客户评价 ---------- */
.quotes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.quotes blockquote {
  margin: 0;
  padding: 32px 28px;
  background: var(--bg);
  border-left: 2px solid var(--accent);
}

.quotes p {
  font-size: 15px;
  color: #262626;
}

.quotes cite {
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 常见问题 ---------- */
.faq-list {
  max-width: 820px;
}

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  padding: 22px 0;
  font-size: 17px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 400;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  padding: 0 0 22px;
  margin: 0;
  max-width: 680px;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- 联系我们 ---------- */
.section-contact {
  padding-bottom: 120px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.contact-item {
  padding: 30px 26px;
  background: var(--surface);
}

.contact-item .label {
  display: block;
  margin-bottom: 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--accent);
}

.contact-item p {
  margin: 0;
  font-size: 15px;
  word-break: break-all;
}

.contact-note {
  margin-top: 26px;
  color: var(--muted);
  font-size: 14px;
}

.contact-note p {
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 768px) {
  .site-header {
    padding: 16px 20px;
  }

  .brand-logo {
    height: 36px;
  }

  .nav-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 8px 20px 18px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }

  .nav a:last-child {
    border-bottom: none;
  }

  .hero {
    padding: 64px 20px 80px;
    text-align: left;
  }

  .hero-sub {
    margin-left: 0;
  }

  .hero-actions {
    justify-content: flex-start;
  }

  .pillars {
    grid-template-columns: 1fr;
    padding: 0 20px 72px;
  }

  .section {
    padding: 72px 20px;
  }

  .section-head {
    margin-bottom: 36px;
  }

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

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

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

  .footer-inner {
    padding: 40px 20px;
  }
}