/* ============================================================
   官网站点样式(多租户共用同一套文件) — 商务蓝/深色系
   设计 token:
     背景   #0B1220  深海军蓝(页面底)
     表面   #101A2E  卡片/区块底
     强调   #4A6CF7  钢蓝(主按钮/链接)
     青     #22D3EE  渐变终点(光带/高亮)
     紫     #4A148C  品牌紫(仅 hero 角落光影,呼应 LOGO)
     文字   #E6EDF7 / 次级 #93A3BC
   展示字体: Noto Serif SC(衬线,大标题);正文: 系统中文栈
   ============================================================ */
:root {
  /* 深色(夜)主题 — 现状商务蓝 */
  --bg: #0b1220;
  --surface: #101a2e;
  --surface-2: #14213a;
  --line: rgba(230, 237, 247, 0.09);
  --primary: #4a6cf7;
  --cyan: #22d3ee;
  --violet: #4a148c;
  --text: #e6edf7;
  --text-2: #93a3bc;
  --radius: 14px;
  --font-display: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Consolas, monospace;
  --header-h: 64px;
  /* 昼夜两主题差异 token(替代原硬编码色,浅色主题整体覆盖) */
  --header-bg: rgba(11, 18, 32, 0.82);
  --nav-bg: rgba(11, 18, 32, 0.97);
  --hover-bg: rgba(255, 255, 255, 0.05);
  --ghost-bg: rgba(255, 255, 255, 0.03);
  --title-a: #ffffff;
  --title-b: #9db2d8;
  --glow-a: rgba(74, 12, 140, 0.35);
  --glow-b: rgba(34, 211, 238, 0.12);
  --shadow: rgba(0, 0, 0, 0.35);
  --tag-bg: rgba(255, 255, 255, 0.04);
  --badge-bg: rgba(255, 255, 255, 0.06);
  --hl-bg: rgba(245, 158, 11, 0.12);
  --hl-text: #fbbf24;
  --err: #f87171;
  color-scheme: dark;
}

/* 浅色(昼)主题: 商务蓝浅色版(品牌主色不变,青色加深保证浅底对比度) */
html[data-theme="light"] {
  --bg: #f4f7fc;
  --surface: #ffffff;
  --surface-2: #eef3fa;
  --line: rgba(23, 42, 74, 0.12);
  --primary: #4a6cf7;
  --cyan: #0891b2;
  --violet: #4a148c;
  --text: #1b2a45;
  --text-2: #5c6b84;
  --header-bg: rgba(255, 255, 255, 0.86);
  --nav-bg: rgba(255, 255, 255, 0.98);
  --hover-bg: rgba(23, 42, 74, 0.06);
  --ghost-bg: rgba(23, 42, 74, 0.04);
  --title-a: #1d2c4d;
  --title-b: #4a6cf7;
  --glow-a: rgba(74, 12, 140, 0.12);
  --glow-b: rgba(8, 145, 178, 0.1);
  --shadow: rgba(15, 30, 60, 0.1);
  --tag-bg: rgba(23, 42, 74, 0.05);
  --badge-bg: rgba(23, 42, 74, 0.06);
  --hl-bg: rgba(245, 158, 11, 0.16);
  --hl-text: #b45309;
  --err: #dc2626;
  color-scheme: light;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 12px); }

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

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

.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ── 站点状态提示条(租户编码未知/站点未开通时由 site.ts 插入到页面顶部) ── */
.site-tip {
  padding: 10px 16px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  color: #ffd9a0;
  background: #4a3410;
  border-bottom: 1px solid #6b4d1c;
}
html[data-theme="light"] .site-tip {
  color: #7a4b00;
  background: #ffe9b8;
  border-bottom-color: #f0cf85;
}

/* ── 顶部导航 ── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner { height: var(--header-h); display: flex; align-items: center; justify-content: space-between; gap: 16px; }

.brand { display: flex; align-items: center; gap: 10px; min-width: 0; }
.brand-logo { width: 34px; height: 34px; object-fit: contain; border-radius: 8px; flex-shrink: 0; }
.brand-name { font-family: var(--font-display); font-size: 20px; letter-spacing: 2px; white-space: nowrap; }

.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-2);
  transition: color 0.2s, background 0.2s;
}
.site-nav a:hover { color: var(--text); background: var(--hover-bg); }
.site-nav .nav-cta {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  font-weight: 600;
}
.site-nav .nav-cta:hover { background: linear-gradient(135deg, var(--primary), var(--cyan)); filter: brightness(1.1); }

.nav-toggle { display: none; background: none; border: 1px solid var(--line); color: var(--text); font-size: 18px; width: 40px; height: 40px; border-radius: 8px; cursor: pointer; }

/* ── 导航右侧操作区(语言切换 + 主题切换 + 移动端菜单按钮) ── */
.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

/* ── 语言切换按钮(显示目标语言: 中文站显示 EN,英文站显示 中) ── */
.lang-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 8px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: none;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  flex-shrink: 0;
}
.lang-toggle:hover { color: var(--cyan); border-color: var(--cyan); background: var(--hover-bg); }

/* ── 昼夜模式切换按钮 ── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: none;
  color: var(--text-2);
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--cyan); border-color: var(--cyan); background: var(--hover-bg); }
.theme-toggle svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
/* 深色(夜)下显示太阳(点击切到白天);浅色(昼)下显示月亮(点击切回夜晚) */
.theme-toggle .icon-sun { display: block; }
.theme-toggle .icon-moon { display: none; }
html[data-theme="light"] .theme-toggle .icon-sun { display: none; }
html[data-theme="light"] .theme-toggle .icon-moon { display: block; }

/* ── Hero: 网格 + 光带 + 巨型品牌字 ── */
.hero {
  position: relative;
  min-height: 72vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background:
    radial-gradient(900px 420px at 82% -10%, var(--glow-a), transparent 65%),
    radial-gradient(700px 380px at 8% 108%, var(--glow-b), transparent 60%),
    var(--bg);
}

/* 签名元素: 测绘网格(呼应数据/工程气质) */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 75%);
}

/* 签名元素: 青色渐变光带(斜向贯穿,如测绘基准线) */
.hero-beam {
  position: absolute;
  left: -10%;
  right: -10%;
  top: 56%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan) 30%, var(--primary) 50%, var(--cyan) 70%, transparent);
  opacity: 0.5;
  transform: rotate(-8deg);
  box-shadow: 0 0 24px rgba(34, 211, 238, 0.35);
}

.hero-inner { position: relative; z-index: 2; padding: 96px 24px; }

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 4px;
  color: var(--cyan);
  margin-bottom: 18px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(64px, 12vw, 128px);
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.1;
  background: linear-gradient(180deg, var(--title-a) 20%, var(--title-b) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.hero-sub {
  margin-top: 20px;
  font-size: clamp(15px, 2vw, 19px);
  color: var(--text-2);
  max-width: 520px;
}

.hero-actions { margin-top: 36px; display: flex; gap: 14px; flex-wrap: wrap; }

/* ── 内页横幅(news.html 等子页面) ── */
.page-hero {
  position: relative;
  padding: 88px 0 96px;
  overflow: hidden;
  background:
    radial-gradient(700px 320px at 85% -20%, var(--glow-a), transparent 65%),
    radial-gradient(600px 300px at 5% 110%, var(--glow-b), transparent 60%),
    var(--bg);
  border-bottom: 1px solid var(--line);
}

.page-hero-inner { position: relative; z-index: 2; }

.page-hero-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 5vw, 44px);
  letter-spacing: 0.04em;
}

.page-hero-desc {
  margin-top: 12px;
  color: var(--text-2);
  font-size: clamp(14px, 2vw, 16px);
}

/* ── 按钮 ── */
.btn {
  display: inline-block;
  padding: 12px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, filter 0.15s, box-shadow 0.2s;
}
.btn:hover { transform: translateY(-2px); }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  color: #fff;
  box-shadow: 0 6px 22px rgba(74, 108, 247, 0.35);
}
.btn-primary:hover { filter: brightness(1.08); box-shadow: 0 8px 28px rgba(34, 211, 238, 0.4); }

.btn-ghost { border: 1px solid var(--line); color: var(--text); background: var(--ghost-bg); }
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ── 区块通用 ── */
.section { padding: 96px 0; }
.section-alt { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 4px;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 36px);
  margin-bottom: 12px;
}

.section-desc { color: var(--text-2); margin-bottom: 36px; }

/* ── 关于我们 ── */
.about-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 48px; align-items: start; margin-top: 36px; }
.about-text p { color: var(--text-2); }
.about-text p.mt { margin-top: 16px; }

.about-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.stat {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 14px;
  text-align: center;
}
.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--cyan);
}
.stat-label { font-size: 13px; color: var(--text-2); }

/* ── 新闻列表 ── */
.news-list { margin-top: 36px; }

.news-item {
  display: flex;
  gap: 24px;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}
.news-item:first-child { padding-top: 0; }
.news-item:last-child { border-bottom: none; }

.news-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-2);
  white-space: nowrap;
  min-width: 130px;
}
.news-body { flex: 1; }
.news-title { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.news-content { font-size: 14px; color: var(--text-2); white-space: pre-wrap; }

.news-empty, .news-loading { color: var(--text-2); padding: 20px 0; }

/* ── 联系方式 ── */
.contact-grid { margin-top: 36px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.contact-item {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px;
}
.contact-label { display: block; font-size: 13px; color: var(--text-2); margin-bottom: 8px; }
.contact-value { font-size: 16px; font-weight: 600; }
a.contact-value:hover { color: var(--cyan); }

/* ── 留言表单 ── */
.msg-form {
  margin-top: 36px;
  max-width: 640px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px;
}

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

.form-field { margin-bottom: 16px; }
.form-field label { display: block; font-size: 14px; margin-bottom: 8px; }
.form-field label em { color: var(--cyan); font-style: normal; }

.form-field input,
.form-field textarea {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  font-family: var(--font-body);
  padding: 11px 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.form-field input:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(74, 108, 247, 0.18);
}
.form-field textarea { resize: vertical; }

.form-error { color: var(--err); font-size: 14px; min-height: 22px; margin-bottom: 8px; }

.form-success {
  color: var(--cyan);
  font-size: 14px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.3);
  padding: 10px 14px;
  border-radius: 10px;
  margin-bottom: 16px;
}

/* ── 页脚 ── */
.site-footer { border-top: 1px solid var(--line); padding: 32px 0; }
.footer-inner { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 13px; color: var(--text-2); }
.footer-inner a:hover { color: var(--cyan); }

/* ── 返回顶部按钮(三页共用) ── */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary), var(--cyan));
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 6px 22px rgba(74, 108, 247, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 100;
}

.back-top.show { opacity: 1; visibility: visible; }

.back-top:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
}

.back-top svg { width: 18px; height: 18px; stroke: #fff; }

/* ── 滚动显现(尊重 reduced-motion) ── */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ── 响应式 ── */
@media (max-width: 860px) {
  .brand-name { font-size: 16px; letter-spacing: 1px; }
  .about-grid { grid-template-columns: 1fr; gap: 28px; }
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .site-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    left: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--line);
    padding: 12px 20px 20px;
    transform: translateY(-120%);
    transition: transform 0.25s ease;
  }
  .site-nav.open { transform: none; }
  .site-nav a { padding: 12px 14px; }
  .nav-toggle { display: block; }
  .section { padding: 72px 0; }
}

@media (max-width: 560px) {
  .about-stats { grid-template-columns: 1fr; }
  .hero { min-height: 64vh; }
}

@media (max-width: 768px) {
  .back-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
  }
}

/* ── 无障碍: 键盘焦点可见 ── */
:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ── 尊重系统减弱动效 ── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .back-top:hover { transform: none; }
}

/* ── 极窄屏: 品牌文字再缩小,防挤压换行 ── */
@media (max-width: 400px) {
  .brand-name { font-size: 14px; letter-spacing: 0.5px; }
}