/* ============================================================
   青岛恒固岩土工程有限公司 — 官网样式
   设计基调：深岩蓝 + 土黄，沉稳、克制、工程感
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root {
  /* 与 HTML 的 <meta name="color-scheme" content="light"> 配套。
     告诉浏览器本页只有浅色主题，禁止它按系统/夜间模式自动反相，
     否则安卓/微信浏览器会把 logo 的白色底板翻成黑色。 */
  color-scheme: light;
  --navy-900: #0b1c2c;
  --navy-800: #102a3f;
  --navy-700: #16374f;
  --navy-600: #1e4a68;
  --slate-600: #4a5c6b;
  --slate-500: #6b7c8a;
  --slate-300: #c3ccd4;
  --slate-200: #dde3e8;
  --slate-100: #eef2f5;
  --paper: #ffffff;
  --earth: #c8892e;
  --earth-light: #e0a94f;
  --earth-pale: #fbf1e0;

  --text: #17242f;
  --text-soft: #5a6b78;
  --text-invert: #f2f6f9;

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;

  --container: 1180px;
  --radius-s: 8px;
  --radius-m: 14px;
  --radius-l: 22px;

  --shadow-s: 0 2px 8px rgba(11, 28, 44, .06);
  --shadow-m: 0 10px 30px rgba(11, 28, 44, .09);
  --shadow-l: 0 22px 60px rgba(11, 28, 44, .14);

  --ease: cubic-bezier(.22, .61, .36, 1);
  --header-h: 76px;
}
/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
body.nav-open { overflow: hidden; }
h1, h2, h3, h4 {
  margin: 0 0 .5em;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.01em;
}
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
img, svg { max-width: 100%; display: block; }
button { font: inherit; color: inherit; }
:focus-visible {
  outline: 2px solid var(--earth);
  outline-offset: 3px;
  border-radius: 4px;
}
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 999;
  padding: 12px 20px;
  background: var(--navy-900);
  color: #fff;
  border-radius: 0 0 var(--radius-s) 0;
}
.skip-link:focus { left: 0; }
/* ---------- 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}
.section { padding: 104px 0; }
.section-alt { background: var(--slate-100); }
.section-head { max-width: 720px; margin-bottom: 60px; }
.section-head-center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--earth);
  text-transform: uppercase;
}
.eyebrow-light { color: var(--earth-light); }
.section-title {
  margin: 0 0 18px;
  font-size: clamp(28px, 4vw, 40px);
  color: var(--navy-900);
}
.section-title-light { color: var(--text-invert); }
.section-lead {
  margin: 0;
  font-size: 17px;
  color: var(--text-soft);
}
.section-lead-light { color: rgba(242, 246, 249, .72); }
.body-light { color: rgba(242, 246, 249, .76); }
/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  background: rgba(11, 28, 44, .72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
.site-header.is-solid {
  background: rgba(11, 28, 44, .95);
  border-bottom-color: rgba(255, 255, 255, .09);
  box-shadow: var(--shadow-m);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 13px; color: #fff; }
/* 标志蓝图放在白色圆角底板上。
   底板白 + 图内透明像素 RGB 也烤白（logo-w1.png）两层保险：
   原 logo.png 透明区 RGB 是纯黑 (0,0,0)，移动端浏览器偶发把透明区
   按 RGB 渲染，手机上就成了黑方块把白底盖住。与 company-name 同一个坑。 */
.brand-mark {
  width: 46px;
  height: 46px;
  flex: none;
  display: grid;
  place-items: center;
  padding: 5px;
  border-radius: 11px;
  background: #fff;
  box-shadow: 0 3px 12px rgba(0, 0, 0, .3);
}
.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.brand-text { display: flex; flex-direction: column; align-items: flex-start; line-height: 1.2; }
.brand-text em {
  font-style: normal;
  font-size: 9.5px;
  letter-spacing: .1em;
  color: rgba(255, 255, 255, .5);
  margin-top: 5px;
  white-space: nowrap;
}

/* 手写体全称 company-name-w1.png：原图是深灰行书 (#3E3A3B)，
   已用 PIL 把 RGB 烤成纯白、alpha 完整保留，不再依赖 CSS filter 染色。
   实测移动端浏览器 filter 偶发失效，露出深灰原图看不清 —— 与 Hero 标题
   当初栽在 CSS mask 上是同一个坑，颜色烤进像素才是根治。
   下方 filter 保留作兜底：白图经过 brightness(0) invert(1) 仍是白
   （白→黑→白），filter 生效与否结果一致，不构成双重处理。
   高度由 site.js 按英文行实测宽度换算覆写，此处仅为无脚本时的兜底 */
.brand-script { display: block; height: 45px; }
.brand-script img {
  display: block;
  height: 100%;
  width: auto;
  filter: brightness(0) invert(1);
}
.site-nav { display: flex; align-items: center; gap: 4px; }
.site-nav a {
  position: relative;
  padding: 9px 15px;
  font-size: 15px;
  color: rgba(255, 255, 255, .82);
  border-radius: 999px;
  transition: color .22s var(--ease), background .22s var(--ease);
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 15px; right: 15px; bottom: 4px;
  height: 2px;
  border-radius: 2px;
  background: var(--earth-light);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .28s var(--ease);
}
.site-nav a:hover { color: #fff; background: rgba(255, 255, 255, .07); }
.site-nav a:hover::after { transform: scaleX(1); }
.site-nav a.is-active { color: #fff; }
.site-nav a.is-active::after { transform: scaleX(1); }
.site-nav .nav-cta {
  margin-left: 10px;
  padding: 10px 22px;
  background: var(--earth);
  color: #fff;
  font-weight: 600;
}
.site-nav .nav-cta::after { display: none; }
.site-nav .nav-cta:hover { background: var(--earth-light); }
/* ---------- 导航下拉菜单（企业简介） ---------- */
.nav-item { position: relative; }
.nav-parent { display: inline-flex; align-items: center; gap: 7px; }
.nav-caret {
  width: 7px;
  height: 7px;
  margin-top: -3px;
  border-right: 1.6px solid currentColor;
  border-bottom: 1.6px solid currentColor;
  transform: rotate(45deg);
  opacity: .6;
  transition: transform .25s var(--ease), margin-top .25s var(--ease);
}
.nav-item:hover .nav-caret,
.nav-item:focus-within .nav-caret { transform: rotate(225deg); margin-top: 3px; }
.nav-sub {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  min-width: 130px;
  padding: 6px;
  border-radius: var(--radius-m);
  background: rgba(9, 24, 38, .97);
  border: 1px solid rgba(255, 255, 255, .1);
  box-shadow: var(--shadow-l);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity .24s var(--ease), transform .24s var(--ease), visibility .24s;
}
.nav-item:hover .nav-sub,
.nav-item:focus-within .nav-sub {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-sub a {
  display: block;
  padding: 9px 12px;
  border-radius: var(--radius-s);
  font-size: 14.5px;
  text-align: center;
  white-space: nowrap;
  color: rgba(242, 246, 249, .82);
}
.nav-sub a::after { display: none; }
.nav-sub a:hover { color: #fff; background: rgba(255, 255, 255, .09); }
.nav-sub a.is-active { color: var(--earth-light); background: rgba(224, 169, 79, .14); }
/* 「岩土工程/结构健康（自动化）监测」等长条目在窄屏下允许换行，避免下拉撑出屏幕 */
@media (max-width: 1280px) {
  .nav-sub a { white-space: normal; }
}
.site-nav a.nav-parent.is-active { color: #fff; }
.site-nav a.nav-parent.is-active::after { transform: scaleX(1); }
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  padding: 12px 10px;
  background: transparent;
  border: 0;
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: #fff;
  transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }
/* ---------- 首屏 ---------- */
/* 首屏块 = hero + 数据条，两者同属深色视觉单元，必须整体撑满一屏。
   v43 去掉了 hero 的 min-height 后整页高度随文案浮动；在 iPad 这类高视口设备上，
   「hero + 数据条」比视口矮十几像素，底部就漏出 body 的浅色纸底，看着像首页没撑满。
   ⚠️ 修复时踩过的坑：把 flex 伸展项挂在 body 上没用 ——
      body 自身高度是 auto（由内容决定），flex-grow 拿不到「视口 - hero」这个基准，
      伸展不生效（v48 试过、白边依旧）。必须由一个「至少 100svh 高的容器」来分配。
      这里 hero 不伸展（flex:0），由数据条吃掉剩余高度，深色自然铺到视口底；
      滚过一屏才进入浅色的公司简介区。 */
.hero-block {
  display: flex;
  flex-direction: column;
  min-height: 100svh;
  background: var(--navy-900);
}
.hero-block > .hero { flex: 0 0 auto; }
.hero-block > .stats { flex: 1 0 auto; }
.hero {
  position: relative;
  /* 原来用「min-height:100svh + 垂直居中」撑满首屏，结果 header 下方空出约 180px，
     老板看着太空。实测这 180px 里只有 42px 是 padding，其余是内容居中后剩下的空间，
     所以光调 padding 最多只能压到约 130px，压不到目标值。
     现在改成「高度随内容 + 顶部对齐」：顶部固定 60px（约为原 180px 的 1/3），
     底部保留 100px，首屏下方会露出下一屏顶部，老板已确认接受。
     代价是底部不再被 padding 撑开，滚动提示贴着内容而不是悬在半空。
     ⚠️ 一旦改回 min-height + align-items:center，顶部空白必然反弹。 */
  display: flex;
  align-items: flex-start;
  padding: calc(var(--header-h) + 60px) 0 128px;
  background: linear-gradient(160deg, var(--navy-800) 0%, var(--navy-900) 55%, #071522 100%);
  color: var(--text-invert);
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.contours {
  position: absolute;
  right: -6%; bottom: -12%;
  width: 78%;
  min-width: 900px;
  color: rgba(224, 169, 79, .13);
  animation: drift 34s linear infinite alternate;
}
@keyframes drift {from { transform: translateX(0) translateY(0); }
to { transform: translateX(-28px) translateY(14px); }
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
  background-size: 68px 68px;
  mask-image: radial-gradient(ellipse 80% 62% at 62% 42%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 62% at 62% 42%, #000 20%, transparent 78%);
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 140px;
  background: linear-gradient(to top, rgba(7, 21, 34, .9), transparent);
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.22fr .78fr;
  gap: 54px;
  align-items: center;
}
.hero-copy { min-width: 0; }
/* ---------- 首屏右上角：平台入口卡片 ---------- */
.hero-entry {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 360px;
  align-self: start;
  margin-top: clamp(16px, 5vh, 56px);
}
.entry-label {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: rgba(224, 169, 79, .85);
}
.entry-card {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 19px 20px;
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .13);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #fff;
  transition: transform .28s var(--ease), background .28s var(--ease),
    border-color .28s var(--ease), box-shadow .28s var(--ease);
}
.entry-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, .11);
  border-color: rgba(224, 169, 79, .55);
  box-shadow: 0 16px 40px rgba(0, 0, 0, .34);
}
.entry-icon {
  width: 50px; height: 50px;
  flex: none;
  display: grid;
  place-items: center;
  font-size: 25px;
  line-height: 1;
  border-radius: 14px;
}
.entry-oa .entry-icon { background: rgba(74, 144, 217, .22); }
.entry-monitor .entry-icon { background: rgba(71, 184, 129, .22); }
.entry-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.entry-body strong { font-size: 17px; font-weight: 700; color: #fff; }
.entry-body em {
  font-style: normal;
  font-size: 12.5px;
  color: rgba(242, 246, 249, .58);
}
.entry-go {
  margin-left: auto;
  flex: none;
  font-size: 18px;
  color: rgba(255, 255, 255, .38);
  transition: transform .28s var(--ease), color .28s var(--ease);
}
.entry-card:hover .entry-go { transform: translateX(4px); color: var(--earth-light); }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 34px;
  padding: 7px 17px 7px 13px;
  border: 1px solid rgba(224, 169, 79, .32);
  border-radius: 999px;
  background: rgba(224, 169, 79, .09);
  font-size: 13.5px;
  letter-spacing: .04em;
  color: var(--earth-light);
}
.hero-eyebrow .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--earth-light);
  box-shadow: 0 0 0 0 rgba(224, 169, 79, .7);
  animation: blip 2.4s ease-out infinite;
}
@keyframes blip {0% { box-shadow: 0 0 0 0 rgba(224, 169, 79, .65); }
70% { box-shadow: 0 0 0 10px rgba(224, 169, 79, 0); }
100% { box-shadow: 0 0 0 0 rgba(224, 169, 79, 0); }
}
.hero-title {
  /* 四字统一用纯白黑体、单行排布，不再混排手写体切图：
     切图放大后笔画发虚、与旁边粗体字对不齐，看着像两张图硬拼。
     统一矢量字体后基线由字体引擎保证，行内高度和视觉重量完全一致。
     桌面左列可用约 650px，字号上限 92px 时四字含字距约 420px，放得下一行；
     字号用 vw 跟视口走，窄屏自动收小，不需要 white-space:nowrap 硬撑。 */
  --hero-ink: #ffffff;
  margin: 0 0 44px;
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC",
               "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: clamp(48px, 8.6vw, 92px);
  line-height: 1.2;
  letter-spacing: .14em;
  font-weight: 900;
  color: var(--hero-ink);
  /* letter-spacing 会在末字之后也留一段空隙，整行视觉就偏左。
     用等量负 margin 抵掉，行末右边界才和文字真正对齐。 */
  margin-right: calc(-.14em);
}
.hero-sub {
  max-width: 640px;
  margin: 0 0 48px;
  font-size: 17px;
  line-height: 2.05;
  color: rgba(242, 246, 249, .76);
}
/* 原 margin-bottom: 62px 是给首屏三项亮点让位的，那三项已删，
   留着就是纯空白，把数据条往折叠线下顶 */
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 0; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  font-size: 15.5px;
  font-weight: 600;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .24s var(--ease), background .24s var(--ease),
    border-color .24s var(--ease), box-shadow .24s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--earth);
  color: #fff;
  box-shadow: 0 10px 26px rgba(200, 137, 46, .32);
}
.btn-primary:hover { background: var(--earth-light); box-shadow: 0 14px 32px rgba(200, 137, 46, .42); }
.btn-ghost {
  border-color: rgba(255, 255, 255, .3);
  color: #fff;
}
.btn-ghost:hover { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .55); }
.scroll-cue {
  position: absolute;
  z-index: 2;
  /* bottom 从 20px 收到 10px：配合 .hero 的 padding-bottom 128px，
     让「按钮底 → 滚动提示顶」从 38px 变成 76px（老板要求翻倍），
     同时把省下的 10px 留给 Hero 自身，总高度只增加 28px 而不是 72px。 */
  left: 50%; bottom: 10px;
  transform: translateX(-50%);
  width: 26px; height: 42px;
  border: 1.5px solid rgba(255, 255, 255, .3);
  border-radius: 999px;
}
.scroll-cue span {
  position: absolute;
  left: 50%; top: 8px;
  width: 3px; height: 7px;
  border-radius: 3px;
  background: var(--earth-light);
  transform: translateX(-50%);
  animation: cue 1.9s var(--ease) infinite;
}
@keyframes cue {0% { opacity: 0; transform: translate(-50%, 0); }
30% { opacity: 1; }
100% { opacity: 0; transform: translate(-50%, 17px); }
}
/* ---------- 数据条 ---------- */
.stats {
  /* 顶部留白：hero 满屏后，数据条卡片直接贴着分隔线，视觉上像被切断。
     演进 40px → 80px（补回段落感）→ 90px（老板反馈滚动提示「滴水」动画
     与下面卡片贴太近，要求再加 10px）。
     注意这里只管 Hero 底 → 卡片顶；滚动提示自己贴着 Hero 底（bottom:10px），
     两段距离叠加才是用户看到的总间隔。 */
  padding-top: 90px;
  /* 在 .hero-block 里作为伸展项，视口有富余时深色背景铺到视口底（见上方说明） */
  flex: 1 0 auto;
  background: var(--navy-900);
  color: #fff;
  border-top: 1px solid rgba(255, 255, 255, .07);
}
.stats-inner {
  display: grid;
  /* 现为 3 项：行业深耕 / 核心业务板块 / 累计承接项目 */
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  padding-top: 0;
  padding-bottom: 0;
}
.stat {
  /* 高度演进：46/50px → 20px → 4px。
     最后一步是老板嫌 130px 还是太高、再压 1/4 拍板的：
     内容（数字 line-height 1.2 的 53px + 16px 间距 + 小字 21px）本身就约 90px，
     上下内边距收到 4px 后区块约 98px，分隔线基本与「数字+文字」等高，
     这也正是最初「卡片高度与分隔线高度相同」那个诉求的落点。
     视觉余量还在：.stat-num 的 line-height 1.2 本身带约 10px 上下行距。 */
  padding: 4px;
  text-align: center;
  border-left: 1px solid rgba(255, 255, 255, .08);
}
.stat:first-child { border-left: 0; }
.stat-num {
  display: block;
  font-size: clamp(32px, 4.4vw, 44px);
  font-weight: 800;
  letter-spacing: -.02em;
  color: var(--earth-light);
  line-height: 1.2;
}
.stat-label {
  display: block;
  /* 原来只隔 6px，大号数字压着小字，看着粘成一团 */
  margin-top: 16px;
  font-size: 14px;
  color: rgba(242, 246, 249, .62);
}
/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card-icon {
  width: 54px; height: 54px;
  margin-bottom: 20px;
  display: grid;
  place-items: center;
  border-radius: 15px;
  background: var(--earth-pale);
  color: var(--earth);
}
.card-icon svg { width: 30px; height: 30px; }
.card-icon svg path, .card-icon svg rect, .card-icon svg circle {
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.badge {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 9px;
  font-size: 11.5px;
  font-weight: 600;
  vertical-align: middle;
  border-radius: 999px;
  background: var(--earth);
  color: #fff;
  letter-spacing: .04em;
  white-space: nowrap;
}
.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}
.card-tags li {
  padding: 4px 11px;
  font-size: 12.5px;
  border-radius: 999px;
  background: var(--slate-100);
  color: var(--slate-600);
}
/* ---------- 业务范围：五大板块 ---------- */
/* 5 张业务卡：3 + 2 均分布局，沿用资质卡的 6 列网格语言 */
.biz-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}
.biz { grid-column: span 2; }
.biz:nth-child(4), .biz:nth-child(5) { grid-column: span 3; }
.biz {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 38px 34px 32px;
  background: var(--paper);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-s);
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.biz::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--earth);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .38s var(--ease);
}
.biz:hover { transform: translateY(-6px); border-color: transparent; box-shadow: var(--shadow-l); }
.biz:hover::before { transform: scaleY(1); }
.biz-no {
  position: absolute;
  top: 18px; right: 26px;
  font-size: 54px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.03em;
  color: transparent;
  -webkit-text-stroke: 1.4px var(--slate-200);
  transition: -webkit-text-stroke-color .3s var(--ease);
  user-select: none;
}
.biz:hover .biz-no { -webkit-text-stroke-color: rgba(200, 137, 46, .5); }
.biz .card-icon { margin-bottom: 18px; }
.biz h3 { margin: 0 0 4px; font-size: 22px; color: var(--navy-900); }
.biz-en {
  margin: 0 0 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--earth);
}
.biz > p:not(.biz-en) { font-size: 15px; line-height: 1.85; color: var(--text-soft); margin-bottom: 22px; }
.biz .card-tags { margin-top: auto; }
.card-icon-accent {
  background: var(--navy-800);
  color: var(--earth-light);
}
/* ---------- 技术实力 ---------- */
.tech {
  display: flex;
  flex-direction: column;
  padding: 32px 30px;
  background: var(--paper);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}
.tech:hover { transform: translateY(-5px); box-shadow: var(--shadow-m); }
.tech .card-icon { margin-bottom: 18px; }
.tech h3 { margin: 0 0 10px; font-size: 19px; color: var(--navy-900); }
.tech > p { font-size: 14.5px; color: var(--text-soft); margin-bottom: 20px; }
.tech-list { display: grid; gap: 9px; }
.tech-list li {
  position: relative;
  padding: 9px 12px 9px 32px;
  font-size: 14px;
  color: var(--text-soft);
  border-radius: var(--radius-s);
  background: var(--slate-100);
}
.tech-list li::before {
  content: "";
  position: absolute;
  left: 12px; top: 16px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--earth);
}
/* ---------- 工程业绩：业务统计卡 ---------- */
/* 5 张等宽卡，横向排列；数字与业务范围五大板块一一对应 */
.perf-stats {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 34px;
}
.perf-stat {
  position: relative;
  padding: 26px 20px 24px;
  text-align: center;
  background: var(--paper);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s var(--ease);
}
.perf-stat::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: var(--pc, var(--earth));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .38s var(--ease);
}
.perf-stat:hover { transform: translateY(-5px); border-color: transparent; box-shadow: var(--shadow-m); }
.perf-stat:hover::before { transform: scaleX(1); }
.perf-num {
  display: block;
  font-size: clamp(34px, 3.6vw, 46px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
  color: var(--pc, var(--navy-900));
  font-variant-numeric: tabular-nums;
}
.perf-num i {
  font-style: normal;
  font-size: .52em;
  font-weight: 700;
  color: var(--pc, var(--earth));
  opacity: .85;
  margin-left: 2px;
}
.perf-label {
  display: block;
  margin-top: 8px;
  font-size: 14.5px;
  color: var(--text-soft);
  letter-spacing: .02em;
}
/* ---------- 项目地图（高德 JS API） ---------- */
.map-card {
  position: relative;
  margin-bottom: 34px;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-m);
  background: var(--paper);
  box-shadow: var(--shadow-s);
  overflow: hidden;
}
/* 全屏按钮：悬浮在地图右上角，脱离工具栏独立存在 */
.map-fs-btn {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 600;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 1px solid var(--slate-200);
  border-radius: 999px;
  background: rgba(255, 255, 255, .94);
  color: var(--slate-600);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow-s);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: border-color .22s var(--ease), color .22s var(--ease), background .22s var(--ease);
}
.map-fs-btn:hover { border-color: var(--earth); color: var(--earth); background: var(--earth-pale); }
.map-fs-btn svg {
  width: 15px; height: 15px;
  fill: none; stroke: currentColor; stroke-width: 2;
  stroke-linecap: round; stroke-linejoin: round;
}

.map-stage { position: relative; }
.map-canvas { width: 100%; height: 420px; background: var(--slate-100); }
.map-loading {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: var(--slate-100);
  color: var(--slate-500);
  font-size: 14px;
  transition: opacity .3s var(--ease), visibility .3s;
}
.map-loading.is-done { opacity: 0; visibility: hidden; }
.map-spin {
  width: 15px; height: 15px;
  border: 2px solid var(--slate-200);
  border-top-color: var(--earth);
  border-radius: 50%;
  animation: mapSpin .8s linear infinite;
}
@keyframes mapSpin { to { transform: rotate(360deg); } }

.map-legend {
  position: absolute;
  left: 14px; bottom: 14px;
  z-index: 500;
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0; padding: 10px 13px;
  list-style: none;
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-s);
  background: rgba(255, 255, 255, .94);
  box-shadow: var(--shadow-s);
  font-size: 12.5px;
  color: var(--slate-600);
}
.map-legend li { display: flex; align-items: center; gap: 7px; }
.map-legend i {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--dot, var(--earth));
}

/* 全屏：整张卡片铺满视口（连工具栏一起全屏，否则退出按钮会跟着消失只剩 ESC 可用） */
.map-card:fullscreen {
  display: flex;
  flex-direction: column;
  width: 100vw;
  height: 100vh;
  margin: 0;
  border: 0;
  border-radius: 0;
}
.map-card:fullscreen .map-stage { flex: 1 1 auto; min-height: 0; }
.map-card:fullscreen .map-canvas { height: 100%; }
/* 全屏时把悬浮按钮与图例稍微内收，避开屏幕边缘 */
.map-card:fullscreen .map-fs-btn { top: 20px; right: 20px; }
.map-card:fullscreen .map-legend { left: 20px; bottom: 20px; }
/* 高德自带 logo 与版权声明 */
.map-canvas .amap-logo,
.map-canvas .amap-copyright { opacity: .75; }

/* 地图旗标与图例 */
/* 旗标层：与地图容器等大的绝对定位层，自己投影绘制旗标。
   整层 pointer-events:none 不挡地图拖拽缩放，只有旗标本身恢复 pointer-events。 */
.map-pin-layer {
  position: absolute;
  inset: 0;
  z-index: 420;
  overflow: hidden;
  pointer-events: none;
}
/* 定位针旗标：圆形头部 + 下方尖角，尖端对准坐标点；配色由 --c 注入，按项目类型区分。
   margin-bottom 8px 把 ::after 尖角的高度补进盒子，JS 按 PIN_H=27 投影时尖端正好落在经纬度点上。 */
.map-pin {
  position: absolute;
  left: 0; top: 0;
  display: block;
  width: 19px; height: 19px;
  margin-bottom: 8px;
  border-radius: 50%;
  background: var(--c, #b5781f);
  border: 2.5px solid #fff;
  box-shadow: 0 2px 6px rgba(11, 28, 44, .5);
  pointer-events: auto;
  cursor: pointer;
  will-change: transform;
  transition: box-shadow .18s var(--ease);
}
.map-pin:hover { box-shadow: 0 3px 12px rgba(11, 28, 44, .65); }
.map-pin::after {
  content: "";
  position: absolute;
  left: 50%; bottom: -7px;
  width: 0; height: 0;
  margin-left: -4.5px;
  border-left: 4.5px solid transparent;
  border-right: 4.5px solid transparent;
  border-top: 8px solid var(--c, #b5781f);
}
/* 悬停项目名：深色底 + 左侧区域色条，白字保证任何底图上都可读 */
/* 悬停提示：对外不展示具体项目名，统一引导到「联系我们」 */
.map-hover-tip {
  position: absolute;
  z-index: 700;
  max-width: 300px;
  padding: 9px 14px;
  border-left: 3px solid var(--edge, var(--earth));
  border-radius: 5px;
  background: rgba(11, 28, 44, .94);
  color: #fff;
  font-size: 12.5px;
  line-height: 1.55;
  white-space: nowrap;
  transform: translate(-50%, -100%);
  pointer-events: none;
  opacity: 0;
  transition: opacity .15s var(--ease);
}
.map-hover-tip b { font-weight: 600; }
.map-hover-tip.is-on { opacity: 1; }

/* 窄屏 */
@media (max-width: 760px) {
  .map-canvas { height: 340px; }
  .map-fs-btn { top: 10px; right: 10px; padding: 7px 11px; font-size: 12px; }
  .map-legend { font-size: 11.5px; padding: 8px 10px; left: 10px; bottom: 10px; gap: 4px; }
  .map-hover-tip { max-width: 220px; white-space: normal; font-size: 12px; }
}
/* ---------- 深色区块 ---------- */
.section-dark {
  position: relative;
  background: linear-gradient(155deg, var(--navy-800), #0a1a28);
  color: var(--text-invert);
  overflow: hidden;
}
.monitoring-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle 620px at 78% 24%, rgba(224, 169, 79, .12), transparent 68%),
    radial-gradient(circle 520px at 12% 82%, rgba(30, 74, 104, .55), transparent 70%);
  pointer-events: none;
}
/* ---------- 分栏 ---------- */
.split {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 64px;
  align-items: center;
}
.feature-list {
  display: grid;
  gap: 4px;
  margin-top: 34px;
}
.feature-list li {
  position: relative;
  padding: 15px 0 15px 30px;
  border-bottom: 1px solid rgba(255, 255, 255, .09);
}
.feature-list li:last-child { border-bottom: 0; }
.feature-list li::before {
  content: "";
  position: absolute;
  left: 2px; top: 25px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--earth);
  box-shadow: 0 0 0 4px rgba(200, 137, 46, .18);
}
.feature-list strong { display: block; font-size: 16px; color: #fff; margin-bottom: 2px; }
.feature-list span { font-size: 14.5px; color: rgba(242, 246, 249, .64); }
.applicability {
  margin: 34px 0 0;
  padding: 16px 20px;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(242, 246, 249, .78);
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .09);
}
.app-label {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 10px;
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  background: var(--earth);
  color: #fff;
  vertical-align: 2px;
}
/* 技术合作/独家代理声明：深色底上用左侧土黄竖条突出，弱化普通正文的观感 */
.partner-note {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 12px;
  margin: 0 0 22px;
  padding: 13px 18px;
  font-size: 14.5px;
  line-height: 1.6;
  color: rgba(242, 246, 249, .9);
  border-radius: var(--radius-m);
  background: rgba(200, 137, 46, .1);
  border: 1px solid rgba(200, 137, 46, .28);
  box-shadow: inset 3px 0 0 var(--earth);
}
.partner-label {
  flex: 0 0 auto;
  padding: 2px 10px;
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .04em;
  border-radius: 999px;
  background: var(--earth);
  color: #fff;
}
/* ---------- 监测设备示意 ---------- */
.device {
  position: relative;
  padding: 40px 34px;
  border-radius: var(--radius-l);
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .1);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.device-sensor {
  display: grid;
  gap: 4px;
  place-items: center;
  padding: 26px 20px;
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  text-align: center;
}
.sensor-led {
  width: 13px; height: 13px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 0 rgba(74, 222, 128, .6);
  animation: blip 2.4s ease-out infinite;
  margin-bottom: 8px;
}
.sensor-name { font-size: 16px; font-weight: 700; color: #fff; }
.sensor-sub { font-size: 12.5px; letter-spacing: .14em; color: rgba(242, 246, 249, .5); }
.link-line {
  position: relative;
  height: 62px;
  margin: 0 auto;
  width: 2px;
  background: linear-gradient(to bottom, rgba(224, 169, 79, .15), rgba(224, 169, 79, .55));
}
.link-line .pulse {
  position: absolute;
  left: 50%;
  top: 0;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--earth-light);
  transform: translateX(-50%);
  box-shadow: 0 0 10px 2px rgba(224, 169, 79, .55);
  animation: travel 2.2s var(--ease) infinite;
}
@keyframes travel {0% { top: 0; opacity: 0; }
20% { opacity: 1; }
80% { opacity: 1; }
100% { top: calc(100% - 7px); opacity: 0; }
}
.device-cloud {
  padding: 24px 22px;
  border-radius: var(--radius-m);
  background: rgba(224, 169, 79, .08);
  border: 1px solid rgba(224, 169, 79, .24);
  text-align: center;
}
.cloud-name { display: block; font-size: 15px; font-weight: 700; color: var(--earth-light); }
.wave {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 4px;
  height: 76px;
  margin: 16px 0;
}
.wave span {
  flex: 1;
  max-width: 14px;
  height: var(--h);
  border-radius: 3px 3px 0 0;
  background: linear-gradient(to top, rgba(224, 169, 79, .35), var(--earth-light));
  animation: wave 1.5s ease-in-out infinite alternate;
}
.wave span:nth-child(2n) { animation-delay: .22s; }
.wave span:nth-child(3n) { animation-delay: .44s; }
.wave span:nth-child(5n) { animation-delay: .66s; }
@keyframes wave {from { transform: scaleY(.42); }
to { transform: scaleY(1); }
}
.cloud-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.cloud-tags span {
  padding: 4px 12px;
  font-size: 12.5px;
  border-radius: 999px;
}
.tag-ok { background: rgba(74, 222, 128, .14); color: #86efac; }
.tag-alert { background: rgba(248, 113, 113, .14); color: #fca5a5; }
@keyframes grow {from { transform: scaleX(0); }
to { transform: scaleX(1); } }
/* ---------- 资质 ---------- */
/* 5 张证书卡：3 + 2 均分布局；竖排版式，证书图居中置顶，点击可放大 */
.qual-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}
.qual {
  grid-column: span 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  padding: 30px 26px 32px;
  text-align: center;
  background: var(--paper);
  border: 1px solid var(--slate-200);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
  transition: border-color .26s var(--ease), box-shadow .26s var(--ease);
}
.qual:nth-child(4),
.qual:nth-child(5) { grid-column: span 3; }
.qual:hover { border-color: var(--earth); box-shadow: var(--shadow-m); }
.qual h3 { margin: 0; font-size: 17px; line-height: 1.5; color: var(--navy-900); }
/* 证书缩略图：统一 120×168 定尺框，横竖版证照都按比例自适应 */
.qual-thumb {
  position: relative;
  width: 120px;
  height: 168px;
  padding: 5px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid var(--slate-200);
  border-radius: 6px;
  cursor: zoom-in;
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease), transform .22s var(--ease);
}
.qual-thumb img { max-width: 100%; max-height: 100%; object-fit: contain; }
.qual-thumb:hover { border-color: var(--earth); box-shadow: var(--shadow-m); transform: translateY(-3px); }
.qual-zoom {
  position: absolute;
  right: -7px;
  bottom: -7px;
  width: 27px;
  height: 27px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--earth);
  color: #fff;
  box-shadow: 0 3px 10px rgba(11, 28, 44, .3);
  transition: transform .22s var(--ease);
}
.qual-zoom svg { width: 15px; height: 15px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.qual-thumb:hover .qual-zoom { transform: scale(1.14); }
/* ---------- 证书放大灯箱 ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 30px;
  background: rgba(4, 12, 20, .93);
  opacity: 0;
  visibility: hidden;
  transition: opacity .26s var(--ease), visibility .26s;
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox-figure { margin: 0; display: grid; justify-items: center; gap: 14px; max-height: 100%; }
.lightbox-figure img {
  max-width: min(92vw, 1080px);
  max-height: 80vh;
  border-radius: 4px;
  background: #fff;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .6);
  transform: scale(.95);
  transition: transform .3s var(--ease);
}
.lightbox.is-open .lightbox-figure img { transform: scale(1); }
.lightbox-figure figcaption { color: rgba(242, 246, 249, .82); font-size: 14.5px; letter-spacing: .04em; }
.lightbox-close {
  position: absolute;
  top: 18px;
  right: 22px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
  color: #fff;
  cursor: pointer;
  transition: background .2s var(--ease), transform .28s var(--ease);
}
.lightbox-close svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; }
.lightbox-close:hover { background: rgba(255, 255, 255, .2); transform: rotate(90deg); }
/* 单栏排版：正文限宽居中，行长控制在 45 字上下 */
.about-panel {
  padding: 54px 56px;
  border-radius: var(--radius-l);
  background: linear-gradient(150deg, var(--navy-800), var(--navy-900));
  color: var(--text-invert);
}
.about-text { max-width: 780px; margin: 0 auto; }
/* 中文正文：首行缩进两字 */
.about-text p {
  color: rgba(242, 246, 249, .72);
  font-size: 15.5px;
  line-height: 2.05;
  text-indent: 2em;
}
.about-text p:last-child { margin-bottom: 0; }
/* ---------- 联系方式 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 26px 24px;
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(255, 255, 255, .11);
  transition: transform .26s var(--ease), background .26s var(--ease), border-color .26s var(--ease);
}
a.contact-card:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, .1);
  border-color: rgba(224, 169, 79, .5);
}
.contact-icon {
  width: 44px; height: 44px;
  flex: none;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: rgba(224, 169, 79, .14);
  color: var(--earth-light);
}
.contact-icon svg { width: 24px; height: 24px; }
.contact-icon svg path, .contact-icon svg rect, .contact-icon svg circle {
  fill: none; stroke: currentColor; stroke-width: 2.1;
  stroke-linecap: round; stroke-linejoin: round;
}
.contact-body { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.contact-label { font-size: 12.5px; color: rgba(242, 246, 249, .5); }
/* 桌面端卡片已加宽，正文单行显示不折行 */
.contact-body strong { font-size: 15.5px; color: #fff; line-height: 1.5; white-space: nowrap; }
.contact-body strong + strong { margin-top: 1px; }
.contact-body strong a {
  border-bottom: 1px solid rgba(255, 255, 255, .28);
  transition: color .22s var(--ease), border-color .22s var(--ease);
}
.contact-body strong a:hover { color: var(--earth-light); border-bottom-color: var(--earth-light); }
.footer-icp a { transition: color .22s var(--ease); }
.footer-icp a:hover { color: var(--earth-light); }
/* ---------- 发展历程（时间轴） ---------- */
/* 中轴线：板块进入视口后由上而下生长，节点依次弹出 */
.timeline {
  position: relative;
  margin: 0;
  padding: 10px 0;
}
.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 116px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--earth) 0%, var(--earth) 62%, var(--slate-300) 100%);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 1.6s var(--ease);
}
.timeline.is-in::before { transform: scaleY(1); }
.tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 42px;
  padding-bottom: 28px;
}
.tl-item:last-child { padding-bottom: 0; }
/* 轴上节点：白底板块上用实心点 + 纸色环，避免与背景糊在一起 */
.tl-item::before {
  content: "";
  position: absolute;
  top: 27px;
  left: 116px;
  width: 15px;
  height: 15px;
  margin-left: -7.5px;
  border-radius: 50%;
  background: var(--earth);
  border: 3px solid var(--paper);
  box-shadow: 0 0 0 1px var(--slate-300), 0 0 0 6px rgba(224, 169, 79, .16);
}
.tl-item.is-in::before { animation: tlPop .55s var(--ease) both; }
@keyframes tlPop {
  0%   { transform: scale(0); }
  62%  { transform: scale(1.3); }
  100% { transform: scale(1); }
}
/* 右内边距让年份避开轴线圆点的光晕，避免末位被压住 */
.tl-date {
  padding: 19px 28px 0 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--navy-800);
  text-align: right;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.tl-card {
  padding: 20px 24px;
  background: var(--paper);
  border: 1px solid var(--slate-200);
  border-left: 3px solid var(--earth);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}
.tl-card:hover { transform: translateX(6px); box-shadow: var(--shadow-m); }
.tl-card h3 { margin: 0 0 6px; font-size: 17px; line-height: 1.55; color: var(--navy-900); }
.tl-card p { margin: 0; font-size: 14px; line-height: 1.8; color: var(--text-soft); }
/* 关键节点：吸收合并潍坊宏兴 */
.tl-item.tl-key .tl-card {
  border-left-color: var(--earth-light);
  background: linear-gradient(150deg, var(--navy-800), var(--navy-900));
  color: var(--text-invert);
}
.tl-item.tl-key .tl-card h3 { color: #fff; }
.tl-item.tl-key .tl-card p { color: rgba(242, 246, 249, .72); }
.tl-item.tl-key::before {
  background: var(--earth-light);
  box-shadow: 0 0 0 1px var(--navy-800), 0 0 0 6px rgba(224, 169, 79, .28);
}
/* ---------- 页脚 ---------- */
.site-footer {
  padding: 62px 0 0;
  background: #071522;
  color: rgba(242, 246, 249, .62);
  font-size: 14px;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px;
  padding-bottom: 34px;
}
.footer-brand { display: flex; flex-direction: column; gap: 9px; }
/* 页脚公司名：同一张 company-name-w1.png，RGB 已烤白（见 .brand-script 注释）
   filter 同样保留作兜底，白图反白仍是白
   高度由 site.js 按下方英文行实测宽度换算，此处仅作无脚本兜底 */
.footer-wordmark { display: block; height: 42px; }
.footer-wordmark img {
  display: block;
  height: 100%;
  width: auto;
  filter: brightness(0) invert(1);
}
.footer-brand-en { font-size: 11.5px; letter-spacing: .1em; color: rgba(242, 246, 249, .4); }
.footer-nav { display: flex; flex-wrap: wrap; gap: 10px 26px; }
.footer-nav a { font-size: 14px; transition: color .22s var(--ease); }
.footer-nav a:hover { color: var(--earth-light); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 22px;
  padding-bottom: 26px;
  border-top: 1px solid rgba(255, 255, 255, .09);
  font-size: 13px;
}
.footer-bottom p { margin: 0; }
/* ---------- 滚动进场动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }
/* ---------- 响应式 ---------- */
/* 导航栏空间不足时同步收紧英文名，中文图宽度由 JS 跟随，保持两者等宽 */
@media (max-width: 1140px) {
  .brand-text em { font-size: 8.6px; letter-spacing: .08em; }
}
@media (max-width: 1024px) {
  .site-nav a { padding: 9px 11px; font-size: 14px; }
  .site-nav a::after { left: 11px; right: 11px; }
  .site-nav .nav-cta { padding: 10px 16px; }

  .hero-inner { grid-template-columns: 1fr; gap: 42px; }
  .hero-entry { max-width: 440px; }

  .qual-grid { grid-template-columns: repeat(2, 1fr); }
  .qual, .qual:nth-child(4), .qual:nth-child(5) { grid-column: span 1; }
.biz-grid { grid-template-columns: repeat(2, 1fr); }
.biz, .biz:nth-child(4), .biz:nth-child(5) { grid-column: span 1; }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 46px; }
  .contact-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-body strong { white-space: normal; }
  .about-panel { padding: 42px 32px; }
.perf-stats { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 760px) {
  :root { --header-h: 66px; }

  .container { padding: 0 20px; }
.section { padding: 72px 0; }
.section-head { margin-bottom: 42px; }
.nav-toggle { display: flex; }
.site-nav {
    position: fixed;
    inset: var(--header-h) 0 auto;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 16px 20px 26px;
    background: rgba(11, 28, 44, .98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, .1);
    box-shadow: var(--shadow-l);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: transform .3s var(--ease), opacity .3s var(--ease), visibility .3s;
  }
.site-nav.is-open { transform: none; opacity: 1; visibility: visible; }
.site-nav a { padding: 14px 16px; font-size: 16px; border-radius: var(--radius-s); }
.site-nav a::after { display: none; }
.site-nav .nav-cta { margin: 8px 0 0; text-align: center; }
/* 下拉菜单在移动端平铺展开，不依赖 hover */
.nav-item { width: 100%; }
.nav-parent { justify-content: center; width: 100%; }
.nav-caret,
.nav-item:hover .nav-caret,
.nav-item:focus-within .nav-caret { margin-top: 0; }
.nav-sub {
  position: static;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px;
  min-width: 0;
  padding: 2px 0 6px;
  background: none;
  border: 0;
  box-shadow: none;
  opacity: 1;
  visibility: visible;
  transform: none;
}
.nav-sub a { padding: 8px 12px; font-size: 14px; }
.brand-text em { display: none; }
.brand-script { height: 22px; }
/* 窄屏同样不再强制满屏；顶部 30px 对矮屏已经够紧凑。
   下边距 160px：窄屏按钮堆叠后离滚动提示原本 54px，同样按翻倍处理到 108px
   （160 - scroll-cue 的 bottom 10 + 高 42 = 108）。 */
.hero { padding: calc(var(--header-h) + 30px) 0 160px; }
.hero-entry { max-width: none; }
/* 窄屏字距收紧，同时等量收紧抵掉末字后空隙的负 margin */
.hero-title { letter-spacing: .04em; margin-right: calc(-.04em); }
.hero-sub { font-size: 15.5px; }
.hero-actions .btn { flex: 1 1 100%; }
.stats { padding-top: 58px; }   /* 窄屏同样多留一行，48px → 58px，与桌面同步加 10px */
.stats-inner { grid-template-columns: repeat(2, 1fr); }
/* 窄屏同步压矮：上下 28px → 20px → 5px，与桌面保持同样的压缩比例 */
.stat { border-left: 0; padding: 5px 14px; }
/* 2 列 3 项时第 3 项独占第二行，需去掉右边框，否则右侧悬一条竖线 */
.stat:nth-child(odd):not(:last-child) { border-right: 1px solid rgba(255, 255, 255, .08); }
.stat:nth-child(-n+2) { border-bottom: 1px solid rgba(255, 255, 255, .08); }
.grid-3 { grid-template-columns: 1fr; }
.biz-grid { grid-template-columns: 1fr; }
.biz, .biz:nth-child(4), .biz:nth-child(5) { grid-column: span 1; }
.qual-grid { grid-template-columns: 1fr; }
.contact-grid { grid-template-columns: 1fr; }
.about-panel { padding: 30px 24px; }
/* 时间轴窄屏改为「日期在上、卡片在下」 */
.timeline { padding: 4px 0; }
.timeline::before { left: 7px; }
.tl-item { grid-template-columns: 1fr; gap: 10px; padding: 0 0 26px 32px; }
.tl-item::before { top: 8px; left: 7px; }
.tl-date { padding: 0; text-align: left; font-size: 15.5px; }
.tl-card { padding: 17px 20px; }
.footer-inner { flex-direction: column; }
.footer-bottom { flex-direction: column; align-items: flex-start; }
.perf-stats { grid-template-columns: repeat(2, 1fr); gap: 14px; }
.perf-stat { padding: 20px 14px 18px; }
}
/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed;
  right: 24px; bottom: 26px;
  z-index: 120;                 /* 高于 .site-header 的 100 */
  width: 46px; height: 46px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .2);
  background: rgba(11, 28, 44, .72);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  color: #fff;
  cursor: pointer;
  padding: 0;
  /* 默认隐藏：首屏顶部时不该出现一个无处可去的按钮 */
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .3s var(--ease), transform .3s var(--ease),
              visibility .3s var(--ease), border-color .3s var(--ease),
              color .3s var(--ease), background .3s var(--ease);
}
.to-top svg {
  width: 20px; height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
/* 滚过一屏之后由 JS 加 .is-visible 显形 */
.to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
/* 写在 .is-visible 之后：同特异性，靠源码顺序让 hover 的上浮生效 */
.to-top:hover {
  border-color: rgba(224, 169, 79, .7);
  background: rgba(11, 28, 44, .88);
  color: var(--earth);
  transform: translateY(-3px);
}
.to-top:focus-visible { outline: 2px solid var(--earth); outline-offset: 3px; }
@media (max-width: 768px) {
  .to-top { right: 16px; bottom: 18px; width: 42px; height: 42px; }
  .to-top svg { width: 18px; height: 18px; }
}
/* 页脚访问量：统计服务挂了也不能影响页面，占位符由 JS 失败分支兜住 */
.footer-stat { color: rgba(242, 246, 249, .45); }
.footer-stat span {
  color: rgba(224, 169, 79, .9);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
/* 隐私声明：独占一行，压低存在感但必须可读 */
.footer-note {
  width: 100%;
  color: rgba(242, 246, 249, .34);
  font-size: 12px;
  line-height: 1.7;
}
/* 版权 / 访问量 / 备案 三件在窄屏竖排时居中，别顶在左边 */
@media (max-width: 700px) {
  .footer-bottom { align-items: center; text-align: center; }
}
/* ---------- 无障碍 / 降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}
@media print {.site-header, .scroll-cue, .to-top, .monitoring-bg { display: none !important; }
body { color: #000; }
.section-dark { background: #fff; color: #000; }
}