:root {
  --bg: #f4f8f7;
  --card: #ffffff;
  --text: #16302c;
  --muted: #5b736e;
  --line: #d7e4e1;
  --brand: #009696;
  --brand-dark: #007a7a;
  --foot: #0f2f2c;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; vertical-align: middle; }
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* ===== Header ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
}
.topbar-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  min-width: 0;
}
.brand-logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
  flex-shrink: 0;
  background: #fff;
  border-radius: 10px;
  border: 1px solid var(--line);
}
.brand-name {
  font-size: 16px;
  font-weight: 800;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
nav {
  display: flex;
  gap: 4px;
  flex-wrap: nowrap;
  flex-shrink: 0;
}
nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
nav a.on,
nav a:hover {
  color: var(--brand-dark);
  background: #eff9f8;
  text-decoration: none;
}

/* ===== Hero: 左文案 + 右手机 ===== */
.hero {
  position: relative;
  overflow: hidden;
  padding: 56px 0 48px;
  background:
    radial-gradient(800px 360px at 10% 0%, rgba(0,150,150,.14), transparent 60%),
    linear-gradient(180deg, #e8f6f5 0%, #f4f8f7 100%);
}
.hero-sm { padding: 40px 0 28px; }
.hero-rich {
  padding: 48px 0 40px;
  background: #e8f4f3;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(100deg, rgba(232,244,243,.94) 0%, rgba(232,244,243,.78) 45%, rgba(232,244,243,.35) 100%),
    url("./hero-bg.jpg") center/cover no-repeat;
  pointer-events: none;
}
.hero-rich-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}
.hero-copy {
  flex: 1 1 auto;
  min-width: 0;
  max-width: 560px;
}
.hero-phone {
  flex: 0 0 260px;
  width: 260px;
  padding: 10px;
  border-radius: 28px;
  background: #12302c;
  box-shadow: 0 24px 50px rgba(15, 47, 44, 0.22);
}
.hero-phone img {
  display: block;
  width: 100%;
  border-radius: 20px;
  background: #fff;
}
.hero-tag {
  margin: 0 0 10px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
}
.hero h1 {
  margin: 0 0 14px;
  font-size: 36px;
  line-height: 1.28;
  font-weight: 900;
}
.hero-desc {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 34em;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}
.btn-primary { color: #fff; background: var(--brand); }
.btn-primary:hover { background: var(--brand-dark); text-decoration: none; }
.btn-line {
  color: var(--brand-dark);
  background: #fff;
  border: 1px solid #9fd6d6;
}
.btn-line:hover { text-decoration: none; }

/* ===== Main blocks ===== */
.main { padding: 36px 0 56px; }
.block { margin-bottom: 40px; }
.block-head { margin-bottom: 16px; }
.block-head h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 900;
}
.block-head p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 22px;
}
.panel p {
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 14px;
}
.panel p:last-child { margin-bottom: 0; }

/* 简介三点：横排三列 */
.about-points {
  display: flex;
  gap: 12px;
  margin-bottom: 14px;
}
.point-card {
  flex: 1 1 0;
  min-width: 0;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px 16px;
}
.point-num {
  display: inline-block;
  margin-bottom: 8px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
}
.point-card h4 {
  margin: 0 0 6px;
  font-size: 16px;
}
.point-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

/* 简介正文 + 徽章：左右两栏 */
.about-panel { margin-top: 0; }
.about-flex {
  display: flex;
  align-items: center;
  gap: 24px;
}
.about-flex > div:first-child {
  flex: 1 1 auto;
  min-width: 0;
}
.about-badge {
  flex: 0 0 160px;
  width: 160px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 18px 14px;
  border-radius: 12px;
  background: #eff9f8;
  border: 1px solid var(--line);
  text-align: center;
}
.about-badge img {
  width: 64px;
  height: 64px;
  object-fit: contain;
  display: block;
}
.about-badge span {
  color: var(--brand-dark);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.4;
}

/* 业务四列 */
.biz-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}
.biz-card {
  flex: 1 1 calc(25% - 14px);
  min-width: 200px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 18px;
}
.biz-icon {
  width: 64px;
  height: 64px;
  margin-bottom: 14px;
  border-radius: 16px;
  background: linear-gradient(145deg, #e5f7f6 0%, #d4f0ee 100%);
  border: 1px solid #bfe4e1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.biz-icon img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  display: block;
}
.biz-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}
.biz-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

/* 产品：上介绍+按钮，下三图 */
.product-panel {
  display: block;
  padding: 28px;
}
.product-intro {
  max-width: none;
  margin-bottom: 22px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}
.product-tag {
  margin: 0 0 8px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
}
.product-intro h3 {
  margin: 0 0 8px;
  font-size: 24px;
  font-weight: 900;
}
.product-intro > p {
  margin: 0;
  max-width: 42em;
  color: var(--muted);
  font-size: 14px;
}
.product-actions {
  margin-top: 16px;
}
.product-actions .btn {
  min-width: 140px;
}
.shot-grid {
  display: flex;
  gap: 16px;
  min-width: 0;
}
.shot-grid figure {
  flex: 1 1 0;
  margin: 0;
  min-width: 0;
}
.shot-grid img {
  width: 100%;
  max-height: 420px;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  display: block;
  box-shadow: 0 8px 20px rgba(15, 47, 44, 0.06);
}
.shot-grid figcaption {
  margin-top: 8px;
  text-align: center;
  color: var(--muted);
  font-size: 12px;
}

.about-simple {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  padding: 28px;
}
.about-simple-copy {
  flex: 1 1 auto;
  min-width: 0;
}
.about-simple-copy h2 {
  margin: 0 0 14px;
  font-size: 22px;
  font-weight: 900;
}
.about-simple-copy p {
  margin: 0 0 12px;
  color: var(--text);
  font-size: 15px;
  line-height: 1.8;
}
.about-simple-copy p:last-child { margin-bottom: 0; }
.about-simple-contact {
  flex: 0 0 280px;
  width: 280px;
  padding: 18px 16px;
  border-radius: 12px;
  background: #eff9f8;
  border: 1px solid var(--line);
}
.about-simple-contact h3 {
  margin: 0 0 14px;
  font-size: 16px;
}
.about-simple-contact p {
  margin: 0 0 12px;
  color: var(--text);
  font-size: 13px;
  line-height: 1.6;
}
.about-simple-contact p:last-child { margin-bottom: 0; }
.about-simple-contact span {
  display: block;
  margin-bottom: 2px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.about-product {
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 28px;
}
.about-product-copy {
  flex: 1 1 auto;
  min-width: 0;
}
.about-product-copy h3 {
  margin: 0 0 10px;
  font-size: 22px;
  font-weight: 900;
}
.about-product-copy > p {
  margin: 0 0 10px;
  color: var(--text);
  font-size: 14px;
  line-height: 1.8;
}
.about-product-shot {
  flex: 0 0 180px;
  width: 180px;
  padding: 8px;
  border-radius: 22px;
  background: #12302c;
  box-shadow: 0 12px 28px rgba(15, 47, 44, 0.16);
}
.about-product-shot img {
  display: block;
  width: 100%;
  border-radius: 16px;
  background: #fff;
}

/* Footer */
.foot {
  background: var(--foot);
  color: rgba(255,255,255,.86);
  padding: 36px 0 22px;
}
.foot-grid {
  display: flex;
  gap: 40px;
}
.foot-grid > div:first-child { flex: 1.4; }
.foot-grid > div:last-child { flex: 0.8; }
.foot h3 {
  margin: 0 0 12px;
  color: #fff;
  font-size: 16px;
}
.foot p { margin: 0 0 8px; font-size: 13px; }
.foot a { color: #7fd4d0; }
.copy {
  margin-top: 22px;
  padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,.12);
  font-size: 12px;
  color: rgba(255,255,255,.55);
}

/* ===== 平板 / 手机 ===== */
@media (max-width: 960px) {
  .wrap { width: calc(100% - 28px); }

  .topbar-inner {
    min-height: auto;
    padding: 10px 0 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .brand-name {
    white-space: normal;
    font-size: 15px;
    line-height: 1.35;
  }
  nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 6px;
  }
  nav a {
    background: #f3f7f6;
    font-size: 13px;
  }

  .hero,
  .hero-rich,
  .hero-sm { padding: 28px 0 24px; }
  .hero h1 { font-size: 26px; }

  .hero-rich-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
  }
  .hero-copy { max-width: none; }
  .hero-phone {
    align-self: center;
    flex-basis: auto;
    width: min(220px, 56%);
  }

  .main { padding: 20px 0 40px; }
  .block { margin-bottom: 28px; }

  .about-points {
    flex-direction: column;
  }
  .about-flex {
    flex-direction: column;
    align-items: stretch;
  }
  .about-badge {
    width: 100%;
    flex-basis: auto;
  }

  .biz-card {
    flex: 1 1 calc(50% - 14px);
  }

  .product-panel { padding: 18px; }
  .product-intro {
    margin-bottom: 16px;
    padding-bottom: 16px;
  }
  .shot-grid {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: 12px;
  }
  .shot-grid figure {
    flex: 0 0 42%;
    max-width: 150px;
  }
  .shot-grid img { max-height: none; }

  .foot-grid { flex-direction: column; gap: 18px; }

  .about-simple {
    flex-direction: column;
    padding: 18px;
  }
  .about-simple-contact {
    width: 100%;
    flex-basis: auto;
  }
  .about-product {
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
  }
  .about-product-shot {
    width: min(180px, 46%);
    flex-basis: auto;
    align-self: center;
  }

  .about-points {
    flex-direction: column;
  }
  .about-flex {
    flex-direction: column;
    align-items: stretch;
  }
  .about-badge {
    width: 100%;
    flex-basis: auto;
  }
}

@media (max-width: 520px) {
  .biz-card { flex: 1 1 100%; }
  .hero h1 { font-size: 22px; }
}