/* ---------- 基础重置与变量 ---------- */
:root {
  --color-primary: #0e9f6e;
  --color-primary-dark: #057a55;
  --color-dark: #0f172a;
  --color-text: #334155;
  --color-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --max-width: 1140px;
  --font: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

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

ul {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
}

.section-eyebrow {
  color: var(--color-primary);
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.1rem;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.section-sub {
  color: var(--color-muted);
  max-width: 560px;
  margin-bottom: 48px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block;
  padding: 13px 26px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  border: 2px solid transparent;
  cursor: pointer;
}

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

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

.btn-outline {
  border-color: var(--color-border);
  color: var(--color-dark);
  background: #fff;
}

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

.btn-full {
  width: 100%;
  text-align: center;
  border: none;
  font-family: inherit;
  font-size: 1rem;
}

/* ---------- 顶部导航栏 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--color-dark);
}

.logo span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-weight: 500;
  color: var(--color-text);
  transition: color 0.2s ease;
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-cta {
  padding: 10px 22px;
}

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(180deg, var(--color-bg-alt) 0%, #ffffff 100%);
  padding: 100px 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 16px;
}

.hero-text h1 {
  font-size: 3rem;
  line-height: 1.15;
  color: var(--color-dark);
  margin-bottom: 20px;
}

.hero-sub {
  color: var(--color-muted);
  max-width: 480px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 40px;
}

.stat strong {
  display: block;
  font-size: 1.5rem;
  color: var(--color-dark);
}

.stat span {
  color: var(--color-muted);
  font-size: 0.9rem;
}

.hero-image {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #a7f3d0, #0e9f6e);
  box-shadow: var(--shadow);
}

/* ---------- 服务卡片 ---------- */
.services {
  background: var(--color-bg);
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 16px;
}

.card h3 {
  color: var(--color-dark);
  margin-bottom: 10px;
  font-size: 1.15rem;
}

.card p {
  color: var(--color-muted);
  font-size: 0.95rem;
}

/* ---------- 关于我们 ---------- */
.about {
  background: var(--color-bg-alt);
}

.about-inner {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: center;
}

.about-image {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #bae6fd, #0ea5e9);
  box-shadow: var(--shadow);
}

.about-text p {
  color: var(--color-text);
  margin-bottom: 24px;
}

.checklist li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 12px;
  color: var(--color-dark);
  font-weight: 500;
}

.checklist li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

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

.testimonial-card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
}

.testimonial-card p {
  color: var(--color-text);
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author {
  font-weight: 600;
  color: var(--color-dark);
  font-size: 0.9rem;
}

/* ---------- 联系我们 ---------- */
.contact {
  background: var(--color-dark);
  color: #fff;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}

.contact .section-title,
.contact-info p {
  color: #fff;
}

.contact-list {
  margin-top: 28px;
}

.contact-list li {
  margin-bottom: 14px;
  color: #cbd5e1;
}

.contact-form {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-form label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-dark);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  padding: 11px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--color-text);
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* ---------- 页脚 ---------- */
.footer {
  background: #0b1220;
  color: #cbd5e1;
  padding-top: 64px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  padding-bottom: 48px;
  flex-wrap: wrap;
}

.footer-brand p {
  margin-top: 12px;
  color: #94a3b8;
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-links h4 {
  color: #fff;
  margin-bottom: 16px;
  font-size: 0.95rem;
}

.footer-links li {
  margin-bottom: 10px;
  color: #94a3b8;
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  text-align: center;
  padding: 20px 0;
  font-size: 0.85rem;
  color: #64748b;
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero-inner,
  .about-inner,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .hero-image,
  .about-image {
    order: -1;
  }

  .cards-grid,
  .testimonial-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 64px 0;
  }

  .hero-text h1 {
    font-size: 2.2rem;
  }

  .cards-grid,
  .testimonial-grid {
    grid-template-columns: 1fr;
  }

  .hero-stats {
    gap: 24px;
  }

  .footer-inner {
    flex-direction: column;
  }
}