/* ============================================================
   Rongtend-LIMS 官网 Landing Page
   深蓝科技风：底 #0B1F3A · 强调 #2E9BFF · 辅色 #1668A8 / #00A5B5
   ============================================================ */

:root {
  --bg: #0B1F3A;
  --bg-2: #0D2544;
  --panel: #123355;
  --panel-2: #0F2A4A;
  --accent: #2E9BFF;
  --accent-2: #00A5B5;
  --accent-deep: #1668A8;
  --text: #EAF3FC;
  --muted: #9DB4CE;
  --border: rgba(46, 155, 255, 0.22);
  --radius: 12px;
  --font: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Segoe UI", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

section[id] { scroll-margin-top: 84px; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  text-align: center;
}
.btn-lg { padding: 15px 34px; font-size: 16px; }
.btn-primary {
  /* 渐变两端均保证白字对比度 ≥ 4.5:1（AA），不用过亮的 #2E9BFF 作按钮底 */
  background: linear-gradient(135deg, #1A76C9 0%, #15608F 100%);
  color: #fff;
  box-shadow: 0 6px 24px rgba(46, 155, 255, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(46, 155, 255, 0.5);
}
.btn-ghost {
  border-color: rgba(46, 155, 255, 0.55);
  color: var(--accent);
  background: rgba(46, 155, 255, 0.06);
}
.btn-ghost:hover {
  background: rgba(46, 155, 255, 0.14);
  transform: translateY(-2px);
}

/* ---------- 顶栏 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 31, 58, 0.86);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo-box {
  /* 反白 logo 直放深蓝背景，无底衬容器，按原始比例（186×60）展示 */
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  width: auto;
}
.brand-logo-box img { height: 100%; width: auto; object-fit: contain; }
.nav { display: flex; gap: 22px; margin-left: auto; }
.nav a {
  color: var(--muted);
  font-size: 14.5px;
  transition: color 0.2s ease;
}
.nav a:hover { color: var(--text); }
.nav-cta { margin-left: 6px; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  margin-left: auto;
  padding: 6px;
}
.nav-toggle span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: 0.25s; }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 96px 0 88px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 480px at 78% 18%, rgba(46, 155, 255, 0.18), transparent 62%),
    radial-gradient(760px 420px at 12% 88%, rgba(0, 165, 181, 0.14), transparent 60%),
    radial-gradient(500px 320px at 50% 40%, rgba(22, 104, 168, 0.12), transparent 65%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.hero-kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  line-height: 1.7;
  letter-spacing: 0.14em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 18px;
}
.badge {
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--accent-2);
  border: 1px solid rgba(0, 165, 181, 0.5);
  border-radius: 20px;
  padding: 2px 10px;
}
.hero-title {
  font-size: clamp(30px, 4.2vw, 46px);
  line-height: 1.35;
  font-weight: 700;
  margin-bottom: 22px;
}
.accent-text {
  background: linear-gradient(100deg, var(--accent) 0%, var(--accent-2) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  color: var(--muted);
  font-size: 16px;
  max-width: 560px;
  margin-bottom: 34px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 20px; }
.hero-note { color: var(--muted); font-size: 13.5px; letter-spacing: 0.04em; }

.shot-frame {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px;
  box-shadow: 0 0 46px rgba(46, 155, 255, 0.22), 0 24px 60px rgba(0, 0, 0, 0.45);
}
.shot-frame img { border-radius: 7px; width: 100%; }

/* ---------- 区块通用 ---------- */
.section { padding: 88px 0; }
.section:nth-of-type(even) { background: var(--bg-2); }
.section-title {
  font-size: clamp(26px, 3.2vw, 34px);
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}
.section-title .en {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.32em;
  color: var(--accent);
  margin-top: 6px;
}
.section-sub {
  text-align: center;
  color: var(--muted);
  font-size: 15.5px;
  margin-bottom: 52px;
}

/* ---------- 卡片 ---------- */
.cards-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(46, 155, 255, 0.5);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
}
.card h3 {
  font-size: 18px;
  margin-bottom: 10px;
  color: var(--accent);
}
.card p { color: var(--muted); font-size: 14.5px; }
.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(46, 155, 255, 0.1);
  border: 1px solid rgba(46, 155, 255, 0.32);
  color: var(--accent);
  margin-bottom: 14px;
  transition: box-shadow 0.25s ease, background 0.25s ease;
}
.card:hover .card-icon {
  background: rgba(46, 155, 255, 0.18);
  box-shadow: 0 0 18px rgba(46, 155, 255, 0.35);
}
.card-icon svg { width: 24px; height: 24px; }

/* 痛点/回答卡片：图标与标题同行，描述文字整行在下 */
.card.break,
.card.answer {
  display: grid;
  grid-template-columns: 46px 1fr;
  /* 第一行固定 = 图标高度，等高拉伸时多余空间全部给描述行，
     避免标题在拉高的行里偏离图标中心 */
  grid-template-rows: 46px 1fr;
  column-gap: 14px;
}
.card.break .card-icon,
.card.answer .card-icon {
  grid-row: 1;
  margin-bottom: 0;
}
.card.break h3,
.card.answer h3 {
  align-self: center;
  margin-bottom: 0;
}
.card.break p,
.card.answer p {
  grid-column: 1 / -1;
  margin-top: 12px;
}

/* ---------- 痛点桥 ---------- */
.bridge {
  text-align: center;
  margin: 52px 0 36px;
  position: relative;
}
.bridge::before,
.bridge::after {
  content: "";
  position: absolute;
  top: 50%;
  width: calc(50% - 190px);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border));
}
.bridge::before { left: 0; }
.bridge::after { right: 0; background: linear-gradient(270deg, transparent, var(--border)); }
.bridge-label {
  display: inline-block;
  padding: 10px 26px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--panel);
  color: var(--text);
  font-weight: 600;
}
.bridge-label .en {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--accent);
  margin-left: 10px;
}

/* ---------- 产品全景 ---------- */
.map-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.map-group {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 20px;
}
.map-group h3 {
  font-size: 16px;
  color: var(--accent);
  margin-bottom: 12px;
}
.map-group h3 small { color: var(--muted); font-weight: 400; font-size: 12.5px; }
.map-items { display: flex; flex-wrap: wrap; gap: 8px; }
.map-items span {
  background: var(--panel-2);
  border: 1px solid rgba(157, 180, 206, 0.25);
  border-radius: 6px;
  padding: 4px 12px;
  font-size: 13px;
  color: var(--text);
}

/* ---------- 业务主线 ---------- */
.flow-steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 10px;
  counter-reset: step;
}
.flow-steps li {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px 12px 14px;
  text-align: center;
  counter-increment: step;
}
.flow-steps li::before {
  content: counter(step);
  display: block;
  width: 24px;
  height: 24px;
  line-height: 24px;
  margin: 0 auto 8px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1A76C9, #15608F);
  font-size: 12px;
  font-weight: 700;
}
.flow-steps li:not(:first-child)::after {
  content: "→";
  position: absolute;
  left: -12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 15px;
}
.flow-steps strong { display: block; font-size: 16px; margin-bottom: 4px; }
.flow-steps span { font-size: 13px; color: var(--muted); }

/* ---------- 报告引擎 ---------- */
.report-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: start;
}
.fact-list { list-style: none; display: flex; flex-direction: column; gap: 16px; }
.fact-list li {
  position: relative;
  padding-left: 26px;
  color: var(--muted);
  font-size: 15px;
}
.fact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.fact-list strong { color: var(--text); }
.fact-list li.highlight {
  background: rgba(46, 155, 255, 0.1);
  border: 1px solid rgba(46, 155, 255, 0.45);
  border-radius: 10px;
  /* 外框整体左移 16px：使框内方块与上方条目的方块标记对齐（x 相同） */
  margin-left: -16px;
  /* 42px = 外伸 16px + 与上方条目文字起点一致的 26px */
  padding: 16px 18px 16px 42px;
  color: var(--text);
}
.fact-list li.highlight::before {
  /* 方块落在与上方条目方块相同的 x 位置 */
  left: 16px;
  top: 24px;
}
.report-compare { display: grid; grid-template-columns: 1fr auto 1fr; gap: 12px; align-items: center; }
.report-compare figure { text-align: center; }
.report-compare .shot-frame { padding: 8px; }
.report-compare img { width: 100%; }
.report-compare figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}
.compare-vs {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--panel);
}

/* ---------- 质量闭环 ---------- */
.loop-wrap { display: flex; justify-content: center; }
.loop {
  position: relative;
  width: min(560px, 92vw);
  height: min(560px, 92vw);
  border: 2px dashed rgba(46, 155, 255, 0.4);
  border-radius: 50%;
}
.loop::before {
  content: "";
  position: absolute;
  inset: 26px;
  border: 1px dashed rgba(0, 165, 181, 0.3);
  border-radius: 50%;
}
.loop-node {
  position: absolute;
  width: 216px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px 18px;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.35);
}
.loop-node h4 { font-size: 15px; color: var(--accent); margin-bottom: 6px; }
.loop-node p { font-size: 12.5px; color: var(--muted); line-height: 1.6; }
.loop-node.n1 { top: -12px; left: 50%; transform: translateX(-50%); text-align: center; }
.loop-node.n2 { right: -118px; top: 44%; transform: translateY(-50%); text-align: center; }
.loop-node.n3 { bottom: -12px; left: 50%; transform: translateX(-50%); text-align: center; }
.loop-node.n4 { left: -118px; top: 44%; transform: translateY(-50%); text-align: center; }
.loop-center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #1b4a7a, var(--panel-2));
  border: 1px solid rgba(46, 155, 255, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 17px;
  line-height: 1.5;
  box-shadow: 0 0 40px rgba(46, 155, 255, 0.3);
}

/* ---------- 设备 ---------- */
.equip-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: center;
}

/* ---------- 审计 ---------- */
.audit-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 44px;
  align-items: center;
}
.layer {
  display: grid;
  grid-template-columns: 46px 1fr;
  column-gap: 18px;
  row-gap: 4px;
  align-items: start;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px 22px;
  margin-bottom: 14px;
}
.layer-num {
  grid-column: 1;
  grid-row: 1;
  font-size: 15px;
  font-weight: 700;
  color: #19B8C8;
  border: 1px solid rgba(0, 165, 181, 0.45);
  border-radius: 8px;
  padding: 6px 10px;
  flex-shrink: 0;
  justify-self: start;
}
.layer h3 { grid-column: 2; grid-row: 1; font-size: 16.5px; margin-bottom: 0; }
.layer p { grid-column: 2; grid-row: 2; font-size: 13.5px; color: var(--muted); }
.audit-note {
  font-size: 14px;
  color: var(--muted);
  border-left: 3px solid var(--accent);
  padding-left: 16px;
  margin-top: 18px;
  /* 与上方 01/02/03 序号徽章左缘对齐（层内边距 22px + 边框 1px） */
  margin-left: 23px;
}

/* ---------- 排程 ---------- */
.schedule-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: center;
}

/* ---------- 权限安全 ---------- */
.security-note {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  margin-top: 30px;
}

/* ---------- 统计分析 ---------- */
.analytics-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 44px;
  align-items: center;
}

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-list details {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.faq-list summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 22px;
  font-size: 15.5px;
  font-weight: 600;
  position: relative;
  padding-right: 48px;
  transition: color 0.2s ease;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 20px;
  font-weight: 400;
}
.faq-list details[open] summary { color: var(--accent); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p {
  padding: 0 22px 20px;
  color: var(--muted);
  font-size: 14.5px;
}

/* ---------- 关于 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
}
.about-text p { color: var(--muted); font-size: 15px; margin-bottom: 14px; }
.about-text strong { color: var(--text); }
.contact-info { list-style: none; margin-top: 20px; display: flex; flex-direction: column; gap: 10px; }
.contact-info li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-size: 14.5px;
}
.contact-info svg {
  width: 17px;
  height: 17px;
  color: var(--accent);
  flex-shrink: 0;
}
.about-services {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 26px 12px;
}
.about-services-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 4px 2px 16px;
  border-bottom: 1px solid rgba(157, 180, 206, 0.15);
}
/* 头部图标与条目图标区分层级：渐变实底 + 白色图标 + 更大尺寸 */
.about-services-head .service-icon {
  width: 46px;
  height: 46px;
  background: linear-gradient(135deg, #1A76C9, #15608F);
  border: none;
  color: #fff;
  box-shadow: 0 4px 16px rgba(46, 155, 255, 0.35);
}
.about-services-head .service-icon svg { width: 24px; height: 24px; }
.about-services-head strong { display: block; font-size: 17px; }
.about-services-head .en {
  display: block;
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--accent);
  margin-top: 2px;
}
.service-list { list-style: none; }
.service-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 0;
}
.service-list li + li { border-top: 1px solid rgba(157, 180, 206, 0.12); }
.service-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  flex-shrink: 0;
  background: rgba(46, 155, 255, 0.1);
  border: 1px solid rgba(46, 155, 255, 0.3);
  color: var(--accent);
}
.service-icon svg { width: 20px; height: 20px; }
.service-text strong { display: block; font-size: 15px; }
.service-text p { font-size: 13px; color: var(--muted); margin-top: 2px; }

/* ---------- 预约表单 ---------- */
.contact-form {
  max-width: 640px;
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 34px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 28px;
  max-width: 980px;
  margin: 0 auto;
  align-items: stretch;
}
.contact-grid .contact-form { max-width: none; margin: 0; }
.qr-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
}
.qr-card h3 {
  font-size: 17px;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}
.qr-card h3::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 20px;
  background: var(--accent);
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 11.5a8.38 8.38 0 0 1-.9 3.8 8.5 8.5 0 0 1-7.6 4.7 8.38 8.38 0 0 1-3.8-.9L3 21l1.9-5.7a8.38 8.38 0 0 1-.9-3.8 8.5 8.5 0 0 1 4.7-7.6 8.38 8.38 0 0 1 3.8-.9h.5a8.48 8.48 0 0 1 8 8v.5z'/%3E%3C/svg%3E") no-repeat center / contain;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 11.5a8.38 8.38 0 0 1-.9 3.8 8.5 8.5 0 0 1-7.6 4.7 8.38 8.38 0 0 1-3.8-.9L3 21l1.9-5.7a8.38 8.38 0 0 1-.9-3.8 8.5 8.5 0 0 1 4.7-7.6 8.38 8.38 0 0 1 3.8-.9h.5a8.48 8.48 0 0 1 8 8v.5z'/%3E%3C/svg%3E") no-repeat center / contain;
}
.qr-card img {
  width: 220px;
  height: 220px;
  border-radius: 10px;
  border: 1px solid rgba(157, 180, 206, 0.3);
  background: #fff;
}
.qr-tip { font-size: 14px; font-weight: 600; color: var(--text); }
.qr-desc { font-size: 12.5px; color: var(--muted); }
.qr-phone { font-size: 13px; color: var(--accent-2); margin-top: 4px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { margin-bottom: 18px; display: flex; flex-direction: column; }
.form-field label { font-size: 13.5px; color: var(--muted); margin-bottom: 7px; }
.form-field input,
.form-field textarea {
  background: var(--panel-2);
  border: 1px solid rgba(157, 180, 206, 0.3);
  border-radius: 8px;
  padding: 11px 14px;
  color: var(--text);
  font-size: 15px;
  font-family: var(--font);
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  resize: vertical;
}
.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(46, 155, 255, 0.18);
}
.form-field.error input,
.form-field.error textarea { border-color: #FF7A7A; }
.form-field .err-msg { display: none; font-size: 12.5px; color: #FF9A9A; margin-top: 5px; }
.form-field.error .err-msg { display: block; }
.contact-form .btn { width: 100%; margin-top: 6px; }
.form-tip {
  text-align: center;
  font-size: 13.5px;
  color: var(--accent-2);
  margin-top: 14px;
  min-height: 20px;
}

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  background: #081729;
  padding: 30px 0;
}
.footer-inner { text-align: center; }
.footer-inner p { color: var(--muted); font-size: 13.5px; }
.footer-icp { margin-top: 6px; font-size: 12.5px; color: #6C8399; }

/* ---------- 滚动渐入 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 64px 0; }
  .report-grid,
  .audit-grid,
  .schedule-grid,
  .analytics-grid,
  .equip-grid,
  .about-grid { grid-template-columns: 1fr; }
  .map-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-steps { grid-template-columns: repeat(4, 1fr); }
  .flow-steps li:nth-child(4n + 1)::after { display: none; }
  .loop-node.n2 { right: -86px; }
  .loop-node.n4 { left: -86px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav {
    display: none;
    position: fixed;
    inset: 68px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: rgba(11, 31, 58, 0.98);
    border-bottom: 1px solid var(--border);
    padding: 10px 24px 20px;
  }
  .nav.open { display: flex; }
  .nav a { padding: 13px 0; border-bottom: 1px solid rgba(157, 180, 206, 0.12); font-size: 16px; }
  .nav-cta { margin-left: auto; padding: 9px 18px; font-size: 14px; }
  .nav-toggle { display: flex; }
  .cards-3 { grid-template-columns: 1fr; }
  .map-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: repeat(2, 1fr); }
  .flow-steps li:nth-child(odd)::after { display: none; }
  .bridge::before,
  .bridge::after { display: none; }
  /* 闭环改纵向 */
  .loop {
    width: 100%;
    height: auto;
    border: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .loop::before { display: none; }
  .loop-node { position: static; width: 100%; transform: none; text-align: left; }
  .loop-node.n1, .loop-node.n2, .loop-node.n3, .loop-node.n4 { position: static; transform: none; }
  .loop-center {
    position: static;
    transform: none;
    margin: 0 auto;
  }
  .form-row { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-title br { display: none; }
}

@media (max-width: 480px) {
  .hero-cta .btn { width: 100%; }
  .report-compare { grid-template-columns: 1fr; }
  .compare-vs { margin: 8px auto; }
  .header-inner { gap: 14px; }
}