:root {
  --water: #0284c7;
  --water-dark: #0369a1;
  --water-light: #e0f2fe;
  --concrete: #64748b;
  --concrete-dark: #334155;
  --concrete-light: #94a3b8;
  --bg-light: #f8fafc;
  --white: #ffffff;
  --silver: #cbd5e1;
  --ink: #1e293b;
  --grid: rgba(2, 132, 199, 0.08);
  --maxw: 1200px;
  --nav-h: 64px;
  --footer-nav-h: 60px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

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

.topbar {
  position: sticky; top: 0; z-index: 50;
  background: #fff;
  border-bottom: 1px solid var(--silver);
}
.topbar .wrap {
  height: 72px; display: flex; align-items: center; gap: 14px;
  justify-content: space-between;
}
.topbar .brand { display: flex; align-items: center; gap: 12px; }
.topbar .brand img { height: 56px; width: auto; object-fit: contain; }
.topbar .brand .txt b { font-size: 18px; color: var(--water-dark); letter-spacing: .5px; }
.topbar .brand .txt span { display: none; }
.topbar .top-cta {
  background: var(--water); color: #fff; padding: 10px 22px; border-radius: 6px;
  font-size: 14px; font-weight: 600; transition: background .2s, transform .2s;
}
.topbar .top-cta:hover { background: var(--water-dark); transform: translateY(-2px); }
.top-nav { display: flex; gap: 24px; align-items: center; }
.top-nav a { font-size: 14px; font-weight: 600; color: var(--concrete); padding: 6px 0; border-bottom: 2px solid transparent; transition: all var(--trans); }
.top-nav a:hover, .top-nav a.active { color: var(--water-dark); border-bottom-color: var(--water); }


.hero {
  position: relative;
  background:
    linear-gradient(120deg, rgba(3,105,161,.86), rgba(2,132,199,.66) 55%, rgba(3,105,161,.72)),
    url('../assets/hero-bg.jpg') center/cover no-repeat fixed;
  color: #fff; overflow: hidden;
  min-height: 100vh;
  display: flex; align-items: center;
}
.hero::after {
  content: ""; position: absolute; right: -80px; top: 50%; transform: translateY(-50%);
  width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.18), transparent 60%);
  pointer-events: none;
}
.hero .wrap { position: relative; z-index: 2; padding: 100px 24px; width: 100%; }

.archive-no {
  display: inline-block; font-family: "Courier New", monospace;
  font-size: 13px; letter-spacing: 3px; color: var(--water-light);
  border: 1px solid rgba(255,255,255,.35); padding: 4px 14px; border-radius: 4px;
  margin-bottom: 22px;
}
.hero h1 {
  font-size: clamp(34px, 6vw, 58px); font-weight: 800; line-height: 1.1;
  letter-spacing: 2px; margin-bottom: 14px;
}
.hero h1 .en {
  display: block; font-size: clamp(13px, 2vw, 18px); font-weight: 400;
  letter-spacing: 5px; color: var(--water-light); margin-top: 10px; opacity: .9;
}
.hero .slogan {
  font-size: clamp(15px, 2.2vw, 19px); max-width: 640px; color: #e2f3ff; margin-bottom: 36px;
}

.spec-grid {
  display: grid; grid-template-columns: repeat(6, 1fr);
  gap: 1px; background: rgba(255,255,255,.18);
  border: 1px solid rgba(255,255,255,.25); max-width: 900px;
}
.spec-grid .spec-item, .spec-grid .v { white-space: nowrap; }
.spec-item { background: rgba(3,37,69,.28); padding: 16px 18px; }
.spec-item .k { font-size: 12px; color: var(--water-light); letter-spacing: 1px; }
.spec-item .v { font-size: clamp(18px, 2.6vw, 24px); font-weight: 700; margin-top: 4px; }
.spec-item .v small { font-size: 12px; font-weight: 400; color: #cbe7fb; }

.section { padding: 72px 0; }
.section.alt { background: var(--bg-light); }
.section.dark { background: var(--concrete-dark); color: #e2e8f0; }
.section-head { margin-bottom: 42px; }
.section-head .tag {
  display: inline-block; font-size: 12px; letter-spacing: 3px; color: var(--water);
  font-weight: 700; margin-bottom: 10px;
}
.section.dark .section-head .tag { color: var(--water-light); }
.section-head h2 {
  font-size: clamp(24px, 3.6vw, 36px); color: var(--concrete-dark); font-weight: 800;
  position: relative; padding-left: 18px;
}
.section.dark .section-head h2 { color: #fff; }
.section-head h2::before {
  content: ""; position: absolute; left: 0; top: 8px; bottom: 8px; width: 5px;
  background: var(--water); border-radius: 3px;
}
.section-head p { margin-top: 12px; color: var(--concrete); max-width: 720px; }

.cards { display: grid; gap: 22px; }
.cards.c3 { grid-template-columns: repeat(3, 1fr); }
.cards.c2 { grid-template-columns: repeat(2, 1fr); }
.cards.c4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--white); border: 1px solid var(--silver); border-radius: 12px;
  padding: 26px; transition: transform .25s, box-shadow .25s, border-color .25s;
  position: relative; overflow: hidden;
}
.section.alt .card { background: #fff; }
.card:hover { transform: translateY(-8px); box-shadow: 0 18px 40px rgba(2,132,199,.18); border-color: var(--water); }
.card .ic {
  width: 48px; height: 48px; border-radius: 10px; background: var(--water-light);
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px; color: var(--water);
}
.card h3 { font-size: 18px; color: var(--concrete-dark); margin-bottom: 10px; }
.card p { font-size: 14px; color: var(--concrete); }
.card .num {
  position: absolute; right: 18px; top: 14px; font-size: 40px; font-weight: 800;
  color: rgba(2,132,199,.08); font-family: "Courier New", monospace;
}

/* 产品性能指标表 */
.spec-table { width: 100%; border-collapse: collapse; margin-top: 14px; font-size: 13px; }
.spec-table th, .spec-table td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--silver); }
.spec-table th { color: var(--water-dark); font-weight: 700; }
.spec-table td { color: var(--concrete); }

/* 解决方案部位块（3列并排竖卡） */
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sol {
  display: flex; flex-direction: column;
  background: var(--white); border: 1px solid var(--silver); border-radius: 14px;
  padding: 32px 28px; transition: transform .25s, box-shadow .25s;
}
.sol:hover { transform: translateY(-6px); box-shadow: 0 16px 36px rgba(2,132,199,.16); }
.sol .sol-ic {
  width: 68px; height: 68px; border-radius: 16px; background: linear-gradient(135deg, var(--water), var(--water-dark));
  display: flex; align-items: center; justify-content: center; color: #fff;
  margin-bottom: 18px;
}
.sol h3 { font-size: 19px; color: var(--concrete-dark); margin-bottom: 14px; }
.sol ul { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; }
.sol ul li {
  font-size: 13px; background: var(--water-light); color: var(--water-dark);
  padding: 5px 12px; border-radius: 20px;
}

/* 工艺步骤 */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }
.step {
  background: rgba(255,255,255,.05); border: 1px solid rgba(255,255,255,.15);
  border-radius: 12px; padding: 22px 18px; text-align: center; position: relative;
}
.step .sn {
  width: 40px; height: 40px; margin: 0 auto 14px; border-radius: 50%;
  background: var(--water); color: #fff; font-weight: 800; display: flex;
  align-items: center; justify-content: center; font-size: 18px;
}
.step h4 { font-size: 15px; margin-bottom: 8px; color: #fff; }
.step p { font-size: 12.5px; color: #b8c4d4; }

/* 资质荣誉 */
.honor {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.honor .hitem { text-align: center; }
.honor .hitem img {
  width: 100%; height: 400px; object-fit: contain; border-radius: 8px;
  border: 1px solid var(--silver); background: #fff; padding: 12px;
  box-shadow: 0 4px 18px rgba(3,37,69,.08);
}
.honor .hitem span { display: block; margin-top: 12px; font-size: 14px; font-weight: 600; color: var(--water-dark); }

/* 荣誉标签卡（醒目） */
.honor-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 30px; width: 100%; }
.htag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 30px;
  background: linear-gradient(135deg, var(--water-dark), var(--water));
  border-radius: 6px;
  color: #fff; font-size: 15px; font-weight: 700; letter-spacing: 1px;
  box-shadow: 0 4px 14px rgba(3,105,161,.25);
  transition: all .25s;
}
.htag::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--orange, #f97316); flex-shrink: 0;
}
.htag:hover { transform: translateY(-3px); box-shadow: 0 10px 24px rgba(3,105,161,.38); background: linear-gradient(135deg, #d95d09, #f97316); }


/* 发展历程时间轴 */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: ""; position: absolute; left: 7px; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(var(--water), var(--silver));
}
.tl-item { position: relative; margin-bottom: 28px; }
.tl-item::before {
  content: ""; position: absolute; left: -27px; top: 6px; width: 16px; height: 16px;
  border-radius: 50%; background: var(--water); border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--water);
}
.tl-item .yr { font-weight: 800; color: var(--water-dark); font-size: 15px; }
.tl-item p { font-size: 14px; color: var(--concrete); margin-top: 4px; }

/* 痛点 */
.pain { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pain .pcard {
  background: rgba(255,255,255,.05); border-left: 4px solid var(--water);
  padding: 22px; border-radius: 0 12px 12px 0;
}
.pain .pcard h4 { color: #fff; font-size: 16px; margin-bottom: 8px; }
.pain .pcard p { font-size: 13.5px; color: #b8c4d4; }

/* 案例 */
.cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.case {
  border-radius: 14px; overflow: hidden; border: 1px solid var(--silver);
  background: #fff; transition: transform .25s, box-shadow .25s;
}
.case:hover { transform: translateY(-8px); box-shadow: 0 18px 40px rgba(2,132,199,.2); }
.case img { width: 100%; height: 180px; object-fit: cover; background: var(--water-light); }
.case .body { padding: 18px; }
.case .body h4 { font-size: 16px; color: var(--concrete-dark); margin-bottom: 6px; }
.case .body span { font-size: 12px; color: var(--water); font-weight: 600; }
.case .body p { font-size: 13px; color: var(--concrete); margin-top: 8px; }

/* 联系 */
.contact-cards {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-bottom: 24px;
}
.ccard {
  background: var(--white); border: 1px solid var(--silver); border-radius: 14px;
  padding: 28px 22px; text-align: center; transition: transform .25s, box-shadow .25s, border-color .25s;
}
.ccard:hover {
  transform: translateY(-6px); box-shadow: 0 16px 36px rgba(2,132,199,.16);
  border-color: var(--water);
}
.ccard .cc-ic {
  width: 56px; height: 56px; margin: 0 auto 14px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--water), var(--water-dark));
  color: #fff;
  display: flex; align-items: center; justify-content: center;
}
.ccard h4 { font-size: 16px; color: var(--concrete-dark); margin-bottom: 6px; }
.ccard p { font-size: 14px; color: var(--concrete-dark); line-height: 1.6; }
.ccard .cc-sub {
  display: block; font-size: 12px; color: var(--concrete); margin-top: 8px;
  padding-top: 8px; border-top: 1px dashed var(--silver);
}

/* 服务承诺 */
.contact-promise {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
  background: linear-gradient(135deg, rgba(2,132,199,.06), rgba(3,105,161,.04));
  border: 1px solid var(--silver); border-radius: 14px; padding: 22px;
  margin-bottom: 32px;
}
.contact-promise .cp-item { display: flex; gap: 12px; align-items: flex-start; }
.contact-promise .cp-ic {
  width: 28px; height: 28px; flex-shrink: 0; border-radius: 50%;
  background: var(--water); color: #fff; font-weight: 800; font-size: 14px;
  display: flex; align-items: center; justify-content: center;
}
.contact-promise .cp-item b { display: block; font-size: 14px; color: var(--concrete-dark); margin-bottom: 2px; }
.contact-promise .cp-item p { font-size: 12.5px; color: var(--concrete); line-height: 1.5; }

/* SEO 板块：服务区域 */
.seo-area {
  margin-top: 8px; padding: 28px 30px;
  background: var(--bg-light); border: 1px solid var(--silver); border-radius: 14px;
}
.seo-area h3 { font-size: 18px; color: var(--water-dark); margin-bottom: 12px; padding-left: 12px; border-left: 4px solid var(--water); }
.seo-area p { font-size: 14px; color: var(--concrete); margin-bottom: 16px; line-height: 1.8; }
.seo-area p strong { color: var(--concrete-dark); font-weight: 700; }
.area-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.area-tags span {
  font-size: 13px; color: var(--water-dark); background: #fff;
  padding: 6px 14px; border-radius: 20px; border: 1px solid var(--silver);
  transition: all .2s;
}
.area-tags span:hover { background: var(--water); color: #fff; border-color: var(--water); transform: translateY(-2px); }

/* 创始人风采 */
.founder-card {
  display: grid; grid-template-columns: 280px 1fr; gap: 30px;
  background: var(--white); border: 1px solid var(--silver); border-radius: 16px;
  padding: 32px; box-shadow: 0 6px 24px rgba(3,37,69,.06);
}
.founder-aside {
  background: linear-gradient(160deg, var(--water-dark), var(--water));
  color: #fff; border-radius: 12px; padding: 28px 22px; text-align: center;
  display: flex; flex-direction: column; align-items: center;
}
.founder-avatar {
  width: 96px; height: 96px; border-radius: 50%;
  background: rgba(255,255,255,.18);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px; color: #fff;
  border: 2px solid rgba(255,255,255,.4);
}
.founder-name h3 { font-size: 22px; color: #fff; margin-bottom: 4px; }
.founder-name span { font-size: 12.5px; color: var(--water-light); }
.founder-meta {
  list-style: none; margin-top: 22px; width: 100%;
  border-top: 1px solid rgba(255,255,255,.2); padding-top: 18px;
  text-align: left;
}
.founder-meta li { padding: 8px 0; font-size: 12.5px; line-height: 1.6; }
.founder-meta li b {
  display: block; color: var(--water-light); font-size: 11px;
  letter-spacing: 1px; margin-bottom: 2px;
}
.founder-meta li span { color: #fff; }
.founder-body p { font-size: 14.5px; color: var(--concrete); line-height: 1.95; margin-bottom: 14px; }
.founder-honors { margin: 18px 0; }
.founder-honors h4 { font-size: 14px; color: var(--water-dark); margin-bottom: 10px; font-weight: 700; }
.fh-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.fh-tags span {
  font-size: 12.5px; color: var(--water-dark); background: var(--water-light);
  padding: 6px 12px; border-radius: 6px; border: 1px solid rgba(2,132,199,.2);
}
.founder-quote {
  margin-top: 18px; padding: 16px 20px;
  background: var(--bg-light); border-left: 4px solid var(--water);
  border-radius: 0 8px 8px 0;
  font-size: 16px; color: var(--water-dark); font-weight: 700; letter-spacing: 2px;
}
.founder-quote cite {
  display: block; margin-top: 6px; font-size: 12px;
  color: var(--concrete); font-style: normal; font-weight: 400; letter-spacing: 0;
}

/* CTA 横幅 */
.cta-band {
  background: linear-gradient(120deg, var(--water-dark), var(--water));
  color: #fff; text-align: center; padding: 56px 24px;
}
.cta-band h2 { font-size: clamp(22px, 3.4vw, 32px); margin-bottom: 12px; }
.cta-band p { color: #d6ecfb; margin-bottom: 26px; }
.cta-btn {
  display: inline-block; background: #fff; color: var(--water-dark);
  padding: 14px 38px; border-radius: 8px; font-weight: 700; font-size: 16px;
  transition: transform .2s, box-shadow .2s;
}
.cta-btn:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(0,0,0,.2); }

.bottom-nav {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; height: var(--footer-nav-h);
  background: rgba(255,255,255,.96); backdrop-filter: blur(10px);
  border-top: 1px solid var(--silver);
  display: flex; justify-content: space-around; align-items: stretch;
}
.bottom-nav a {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; font-size: 12px; color: var(--concrete); transition: color .2s;
  min-height: 44px;
}
.bottom-nav a svg { width: 22px; height: 22px; }
.bottom-nav a.active, .bottom-nav a:hover { color: var(--water); }

/* 返回顶部 */
.to-top {
  position: fixed; right: 18px; bottom: calc(var(--footer-nav-h) + 14px); z-index: 55;
  width: 46px; height: 46px; border-radius: 50%; background: var(--water); color: #fff;
  display: flex; align-items: center; justify-content: center; cursor: pointer;
  box-shadow: 0 8px 20px rgba(2,132,199,.4); opacity: 0; pointer-events: none; transition: opacity .3s;
}
.to-top.show { opacity: 1; pointer-events: auto; }

@media (max-width: 1023px) {
  .spec-grid { grid-template-columns: repeat(3, 1fr); max-width: 100%; }
  .cards.c4 { grid-template-columns: repeat(2, 1fr); }
  .honor { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .cases { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: repeat(2, 1fr); }
  .contact-promise { grid-template-columns: repeat(2, 1fr); }
  .founder-card { grid-template-columns: 1fr; gap: 22px; }
  .founder-aside { display: flex; flex-direction: row; flex-wrap: wrap; align-items: center; text-align: left; gap: 18px; }
  .founder-avatar { margin-bottom: 0; }
  .founder-meta { margin-top: 0; border-top: none; padding-top: 0; flex: 1; min-width: 200px; }
}
@media (max-width: 767px) {
  .spec-grid { grid-template-columns: repeat(2, 1fr); }
  .honor { grid-template-columns: 1fr; }
  .wrap { padding: 0 18px; }
  .section { padding: 52px 0; }
  .cards.c3, .cards.c2, .cards.c4 { grid-template-columns: 1fr; }
  .sol-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .pain { grid-template-columns: 1fr; }
  .cases { grid-template-columns: 1fr; }
  .honor { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .contact-cards { grid-template-columns: 1fr; }
  .contact-promise { grid-template-columns: 1fr; }
  .founder-card { padding: 22px; }
  .founder-aside { flex-direction: column; text-align: center; }
  .founder-avatar { margin-bottom: 12px; }
  .founder-meta { margin-top: 16px; padding-top: 16px; border-top: 1px solid rgba(255,255,255,.2); text-align: center; }
  .seo-area { padding: 22px 20px; }
  .topbar .brand .txt span { display: none; }
  .topbar .top-cta { padding: 9px 16px; font-size: 13px; }
  .hero .wrap { padding: 48px 18px 64px; }
  .bottom-nav a span { font-size: 11px; }
}