/* 基础变量与重置 */
:root {
  --bg: #0b0c10;
  --panel: #12141a;
  --text: #e6e8eb;
  --muted: #9aa3af;
  --brand: #39b982; /* 绿色偏中性 */
  --brand-600: #2ea873;
  --brand-700: #238c60;
  --border: #1f2430;
  --card: #0f1116;
  --danger: #e03e3e;
  --shadow: 0 6px 24px rgba(0,0,0,.25);
  --radius: 12px;
  --radius-sm: 10px;
  --radius-lg: 18px;
  --space: 16px;
  --space-lg: 28px;
  --max: 1080px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(1200px 600px at 20% -10%, #1a1f2a 0%, #0b0c10 60%), var(--bg);
  font: 16px/1.6 system-ui, -apple-system, Segoe UI, Roboto, Noto Sans SC, PingFang SC, Microsoft Yahei, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex: 1;
  overflow-y: auto;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* 容器与网格 */
.container { width: 100%; max-width: var(--max); margin: 0 auto; padding: 0 var(--space); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

/* 头部导航 */
.site-header { position: sticky; top: 0; z-index: 10; background: rgba(11,12,16,0.8); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: 0.2px; }
.brand.small { font-size: 14px; }
.brand-logo { width: 22px; height: 22px; display: inline-grid; place-items: center; background: linear-gradient(135deg, var(--brand), #5ed3a4); color: #0b0c10; border-radius: 6px; font-weight: 900; }
.brand-logo-img { width: 22px; height: 22px; border-radius: 4px; object-fit: cover; }
.brand-name { white-space: nowrap; }
.nav { display: flex; gap: 14px; align-items: center; }
.nav a { padding: 8px 12px; color: var(--muted); border-radius: 8px; }
.nav a:hover { color: var(--text); background: rgba(255,255,255,0.05); }
.nav a.active { color: #fff; background: rgba(57,185,130,0.15); border: 1px solid rgba(57,185,130,0.35); }
.nav-toggle { display: none; border: 1px solid var(--border); background: var(--panel); color: var(--text); border-radius: 10px; padding: 8px 10px; }

/* 主要板块 */
.hero { padding: 80px 0; background: linear-gradient(180deg, rgba(57,185,130,0.15), rgba(57,185,130,0) 40%); }
.hero h1 { font-size: 40px; line-height: 1.2; margin: 0 0 10px; }
.hero-sub { color: var(--muted); margin: 0 0 18px; font-size: 18px; }
.hero-actions { display: flex; gap: 12px; }

.section { padding: 56px 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0) 60%); }
.section h2 { margin: 0 0 16px; font-size: 24px; }

.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }

.btn { display: inline-block; padding: 10px 16px; border-radius: 12px; border: 1px solid var(--border); background: var(--panel); color: var(--text); }
.btn:hover { background: #171a22; }
.btn.primary { background: linear-gradient(135deg, var(--brand), var(--brand-600)); color: #0b0c10; border: none; font-weight: 600; }
.btn.primary:hover { background: linear-gradient(135deg, var(--brand-600), var(--brand-700)); }

.benefits { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.benefits li { background: rgba(255,255,255,0.03); border: 1px solid var(--border); padding: 12px 14px; border-radius: var(--radius-sm); }

.cta { text-align: center; }
.cta-inner { display: inline-flex; flex-direction: column; gap: 12px; align-items: center; padding: 20px 24px; border-radius: var(--radius-lg); background: linear-gradient(180deg, rgba(57,185,130,0.12), rgba(57,185,130,0.03)); border: 1px solid rgba(57,185,130,0.25); }

/* 文本与列表 */
h1, h2, h3 { line-height: 1.3; }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.list { margin: 0; padding-left: 18px; }
.list.small { font-size: 14px; }
.kvs { list-style: none; padding: 0; margin: 12px 0; display: grid; gap: 8px; }
.kvs li { display: flex; align-items: center; gap: 8px; background: rgba(255,255,255,0.03); border: 1px solid var(--border); padding: 10px 12px; border-radius: var(--radius-sm); }
.kvs li span { color: var(--muted); width: 92px; flex: 0 0 auto; }

.timeline { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.timeline li { display: grid; grid-template-columns: 100px 1fr; gap: 12px; align-items: start; padding: 10px 12px; border: 1px dashed var(--border); border-radius: var(--radius-sm); background: rgba(255,255,255,0.02); }
.timeline .time { color: var(--muted); }

.news-item { padding: 16px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--card); box-shadow: var(--shadow); margin-bottom: 14px; }
.news-item h3 { margin: 0 0 6px; }

.map-placeholder { height: 220px; border-radius: var(--radius); border: 1px dashed var(--border); background: repeating-linear-gradient(45deg, rgba(255,255,255,0.04) 0 10px, rgba(255,255,255,0.02) 10px 20px); display: grid; place-items: center; color: var(--muted); }

.contact-form { display: grid; gap: 10px; }
.contact-form label { display: grid; gap: 6px; font-size: 14px; color: var(--muted); }
.contact-form input, .contact-form textarea { padding: 10px 12px; border-radius: 10px; border: 1px solid var(--border); background: var(--panel); color: var(--text); }
.contact-form input:focus, .contact-form textarea:focus { outline: 2px solid rgba(57,185,130,0.35); border-color: rgba(57,185,130,0.5); }

.job-card h3 { margin-top: 0; }

/* 页脚 */
.site-footer { 
  border-top: 1px solid var(--border); 
  padding: 24px 0; 
  background: linear-gradient(180deg, rgba(11,12,16,0.8), rgba(11,12,16,0.95)); 
  backdrop-filter: blur(10px);
  flex-shrink: 0;
  position: sticky;
  bottom: 0;
  z-index: 10;
}
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.footer-nav { display: flex; gap: 12px; align-items: center; }
.footer-nav a { color: var(--muted); }
.footer-nav a:hover { color: var(--text); }

/* 增强卡片效果 */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand-600));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.25);
}
.card:hover::before {
  opacity: 1;
}

/* 改进hero区域 */
.hero {
  padding: 80px 0;
  background: linear-gradient(135deg, rgba(57,185,130,0.12), rgba(57,185,130,0.05));
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(57,185,130,0.1) 0%, transparent 70%);
  animation: float 20s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(-30px, -30px) rotate(120deg); }
  66% { transform: translate(20px, -10px) rotate(240deg); }
}
.hero h1 {
  font-size: 42px;
  line-height: 1.2;
  margin: 0 0 10px;
  background: linear-gradient(135deg, var(--text), var(--brand));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  z-index: 1;
}
.hero-sub {
  color: var(--muted);
  margin: 0 0 18px;
  font-size: 18px;
  position: relative;
  z-index: 1;
}

/* 增强按钮效果 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
  transition: left 0.5s ease;
}
.btn:hover {
  background: #171a22;
  transform: translateY(-1px);
}
.btn:hover::before {
  left: 100%;
}
.btn.primary {
  background: linear-gradient(135deg, var(--brand), var(--brand-600));
  color: #0b0c10;
  border: none;
  font-weight: 600;
  box-shadow: 0 4px 15px rgba(57,185,130,0.3);
}
.btn.primary:hover {
  background: linear-gradient(135deg, var(--brand-600), var(--brand-700));
  box-shadow: 0 6px 20px rgba(57,185,130,0.4);
}

/* 响应式 */
@media (max-width: 960px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hero { padding: 56px 0; }
  .hero h1 { font-size: 30px; }
  .nav { display: none; position: absolute; right: 12px; top: 64px; flex-direction: column; background: var(--panel); padding: 8px; border: 1px solid var(--border); border-radius: 10px; box-shadow: var(--shadow); }
  .nav.open { display: flex; }
  .nav-toggle { display: inline-block; }
}