/* 基础重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 颜色变量 */
:root {
  --yellow: #F5A623;
  --yellow-dark: #D4881A;
  --dark: #1A1A1A;
  --grey: #333333;
  --grey-light: #f5f5f5;
  --grey-mid: #666666;
  --white: #ffffff;
}

body {
  font-family: "微软雅黑", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--grey);
  line-height: 1.7;
  font-size: 16px;
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 顶部导航 */
.header {
  background-color: var(--dark);
  color: var(--white);
  padding: 14px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo h1 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--yellow);
}

.logo .tagline {
  font-size: 0.78rem;
  color: #aaaaaa;
  margin-top: 2px;
}

.header-contact {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
  flex-shrink: 0;
}

.header-phone {
  color: var(--yellow);
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  letter-spacing: 0.5px;
}

.header-phone:hover {
  color: var(--white);
}

/* 首屏横幅 */
.hero {
  background-color: var(--dark);
  background-image: linear-gradient(135deg, #1A1A1A 0%, #2d2d2d 100%);
  color: var(--white);
  text-align: center;
  padding: 64px 20px;
  border-bottom: 4px solid var(--yellow);
}

.hero h2 {
  font-size: 2rem;
  color: var(--yellow);
  margin-bottom: 12px;
}

.hero p {
  font-size: 1.05rem;
  margin-bottom: 8px;
  color: #cccccc;
}

.hero-sub {
  font-size: 0.92rem !important;
  color: #999999 !important;
  margin-bottom: 28px !important;
}

.hero-phones {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 24px;
}

.hero-phones a {
  color: var(--yellow);
  font-size: 1.4rem;
  font-weight: 700;
  text-decoration: none;
  padding: 10px 28px;
  border: 2px solid var(--yellow);
  border-radius: 4px;
  letter-spacing: 1px;
  transition: background-color 0.2s, color 0.2s;
}

.hero-phones a:hover {
  background-color: var(--yellow);
  color: var(--dark);
}

/* 通用区块样式 */
.section {
  padding: 60px 0;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--dark);
  text-align: center;
  margin-bottom: 36px;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 50px;
  height: 4px;
  background-color: var(--yellow);
  margin: 10px auto 0;
  border-radius: 2px;
}

/* 公司简介 */
.about {
  background-color: var(--white);
}

.about-content p {
  color: var(--grey-mid);
  margin-bottom: 14px;
  font-size: 1rem;
  max-width: 750px;
  margin-left: auto;
  margin-right: auto;
  text-align: justify;
}

/* 租赁设备 */
.equipment {
  background-color: var(--grey-light);
}

.equipment-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 20px;
}

.equipment-card {
  background-color: var(--white);
  border-radius: 8px;
  padding: 28px 20px;
  text-align: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.07);
  border-top: 4px solid var(--yellow);
}

.equipment-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
}

.equipment-card p {
  font-size: 0.85rem;
  color: var(--grey-mid);
  line-height: 1.6;
}

.equip-sizes {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.equip-sizes li {
  background-color: var(--grey-light);
  color: var(--grey);
  font-size: 0.82rem;
  padding: 3px 10px;
  border-radius: 3px;
  font-weight: 600;
}

/* 业务范围 */
.services {
  background-color: var(--white);
}

.services-list {
  list-style: none;
  max-width: 600px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.services-list li {
  background-color: var(--grey-light);
  padding: 14px 20px;
  border-radius: 6px;
  font-size: 1rem;
  color: var(--grey);
  border-left: 4px solid var(--yellow);
}

/* 联系方式 */
.contact {
  background-color: var(--dark);
  color: var(--white);
}

.contact .section-title {
  color: var(--yellow);
}

.contact-sub {
  text-align: center;
  color: #aaaaaa;
  margin-top: -20px;
  margin-bottom: 36px;
  font-size: 0.95rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.contact-card {
  background-color: #2a2a2a;
  border-radius: 8px;
  padding: 30px 20px;
  text-align: center;
  border-top: 4px solid var(--yellow);
}

.contact-card h3 {
  font-size: 0.95rem;
  color: #aaaaaa;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-value {
  display: block;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--yellow);
  text-decoration: none;
  margin-top: 6px;
}

a.contact-value:hover {
  color: var(--white);
}

.wechat-id {
  font-size: 1.1rem;
  letter-spacing: 1px;
}

.wechat-qr {
  width: 140px;
  height: 140px;
  margin-top: 12px;
  border-radius: 6px;
  object-fit: cover;
}

/* 底部 */
.footer {
  background-color: #111111;
  color: #666666;
  text-align: center;
  padding: 24px 20px;
  font-size: 0.85rem;
  line-height: 2;
}

/* 手机端底部悬浮拨号按钮 */
.mobile-call-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  padding: 10px 16px;
  background-color: var(--dark);
  border-top: 2px solid var(--yellow);
}

.mobile-call-btn {
  display: block;
  background-color: var(--yellow);
  color: var(--dark);
  text-align: center;
  padding: 14px;
  border-radius: 4px;
  font-weight: 700;
  font-size: 1.05rem;
  text-decoration: none;
}

/* 手机端适配 */
@media (max-width: 640px) {
  /* 为底部悬浮按钮留出空间 */
  body {
    padding-bottom: 72px;
  }

  .mobile-call-bar {
    display: block;
  }

  /* 顶部隐藏电话，底部悬浮按钮代替 */
  .header-contact {
    display: none;
  }

  .logo .tagline {
    display: none;
  }

  .hero h2 {
    font-size: 1.45rem;
  }

  .hero-phones a {
    font-size: 1.15rem;
    padding: 10px 20px;
  }

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

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

  .section {
    padding: 44px 0;
  }

  .section-title {
    font-size: 1.35rem;
  }
}