/* ============================================================
 * EnergNode 主题样式 —— 白色底 + 蓝色主色
 * ============================================================ */
:root {
  --blue: #2563eb;
  --blue-deep: #1e40af;
  --blue-soft: #eff6ff;
  --blue-border: #dbeafe;
  --ink: #1e293b;
  --muted: #64748b;
  --bg: #ffffff;
  --bg-soft: #f8fafc;
  --border: #e2e8f0;
  --green: #059669;
  --orange: #d97706;
  --red: #dc2626;
  --gray: #64748b;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(30, 64, 175, .08), 0 4px 14px rgba(30, 64, 175, .06);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 15px;
}
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-deep); }
h1, h2, h3, h4 { line-height: 1.35; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.muted { color: var(--muted); font-size: 13.5px; }
.src { color: var(--muted); font-size: 12.5px; }
.empty { text-align: center; color: var(--muted); padding: 48px 0; background: var(--bg-soft); border-radius: var(--radius); }
.sec-mini { margin: 26px 0 12px; color: var(--blue-deep); font-size: 17px; }
.search-sum { margin-bottom: 16px; color: var(--muted); }
.search-sum b { color: var(--blue); }

/* ---------- 页头 ---------- */
.site-head {
  position: sticky; top: 0; z-index: 900;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.head-in { display: flex; align-items: center; gap: 18px; height: 62px; }
.logo { display: flex; align-items: center; gap: 8px; }
.logo-mark {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--blue), #60a5fa); color: #fff; font-size: 18px;
}
.logo-txt { font-size: 20px; letter-spacing: .2px; color: var(--ink); }
.logo-txt b { color: var(--blue); }
.logo-txt.light { color: #fff; font-size: 18px; }
.main-nav { display: flex; gap: 2px; flex: 1; flex-wrap: nowrap; }
.main-nav a {
  padding: 6px 10px; border-radius: 8px; color: var(--ink); font-size: 14px; white-space: nowrap;
}
.main-nav a:hover { background: var(--blue-soft); color: var(--blue); }
.main-nav a.active { color: var(--blue); font-weight: 600; background: var(--blue-soft); }
.head-tools { display: flex; align-items: center; gap: 8px; }
.tool-link { font-size: 13.5px; color: var(--ink); padding: 6px 8px; border-radius: 8px; white-space: nowrap; }
.tool-link:hover { background: var(--blue-soft); color: var(--blue); }
.tool-link.ai-link {
  background: var(--blue); color: #fff; font-weight: 600; padding: 7px 12px; border-radius: 20px;
}
.tool-link.ai-link:hover { background: var(--blue-deep); }
.btn-member {
  border: 1.5px solid var(--blue); color: var(--blue); padding: 6px 14px; border-radius: 20px;
  font-size: 13.5px; white-space: nowrap; font-weight: 600;
}
.btn-member:hover { background: var(--blue); color: #fff; }
.btn-member.logged { border-color: var(--green); color: var(--green); }
.burger { display: none; background: none; border: none; font-size: 22px; color: var(--ink); cursor: pointer; }

/* 语言切换 */
.lang-wrap { position: relative; }
.lang-btn {
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: 20px;
  padding: 6px 12px; font-size: 13px; cursor: pointer; color: var(--ink); white-space: nowrap;
}
.lang-menu {
  display: none; position: absolute; right: 0; top: calc(100% + 6px);
  background: #fff; border: 1px solid var(--border); border-radius: 10px;
  box-shadow: var(--shadow); min-width: 160px; max-height: 320px; overflow: auto; z-index: 950;
}
.lang-menu.show { display: block; }
.lang-menu a {
  display: block; padding: 8px 14px; color: var(--ink); font-size: 13.5px;
}
.lang-menu a:hover { background: var(--blue-soft); }
.lang-menu a.active { color: var(--blue); font-weight: 600; background: var(--blue-soft); }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(900px 320px at 85% -60px, rgba(96, 165, 250, .18), transparent),
    radial-gradient(700px 300px at 10% -40px, rgba(37, 99, 235, .12), transparent),
    #fff;
  border-bottom: 1px solid var(--border);
  padding: 64px 0 48px;
}
.hero h1 { font-size: 34px; color: var(--ink); }
.hero h1 b { color: var(--blue); }
.hero .sub { color: var(--muted); max-width: 760px; margin: 14px 0 26px; font-size: 16px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 11px 24px; border-radius: 24px; font-size: 15px; font-weight: 600;
}
.btn-primary { background: var(--blue); color: #fff; }
.btn-primary:hover { background: var(--blue-deep); color: #fff; }
.btn-ghost { border: 1.5px solid var(--blue-border); color: var(--blue); background: #fff; }
.btn-ghost:hover { border-color: var(--blue); }

/* ---------- 产业看板 ---------- */
.dash-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: -34px 0 40px; position: relative; z-index: 5; }
.dash-card {
  display: flex; gap: 12px; align-items: center; background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); color: var(--ink);
  transition: transform .15s;
}
.dash-card:hover { transform: translateY(-3px); }
.dash-ico { font-size: 26px; }
.dash-label { font-size: 12.5px; color: var(--muted); }
.dash-value { font-weight: 700; font-size: 15.5px; }
.dash-trend { font-size: 12.5px; }
.dash-trend.up { color: var(--green); }
.dash-trend.down { color: var(--orange); }

/* ---------- 区块通用 ---------- */
.section { padding: 40px 0; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 20px; }
.section-head h2 { font-size: 24px; }
.section-head h2::before { content: ""; display: inline-block; width: 5px; height: 20px; background: var(--blue); border-radius: 3px; margin-right: 10px; vertical-align: -3px; }
.section-head .more { font-size: 13.5px; }
.soft-bg { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* ---------- 赛道卡片 ---------- */
.track-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.track-card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 16px;
  color: var(--ink); border-top: 3px solid var(--tc, var(--blue)); transition: transform .15s, box-shadow .15s;
}
.track-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.track-ico { font-size: 28px; }
.track-ico.big { font-size: 30px; margin-right: 10px; }
.track-card h3 { margin: 8px 0 6px; font-size: 17px; }

/* ---------- 最新入库 ---------- */
.latest-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.col h4 { color: var(--blue-deep); margin-bottom: 10px; font-size: 16px; }
.line-item {
  display: flex; justify-content: space-between; gap: 12px; padding: 9px 0;
  border-bottom: 1px dashed var(--border); color: var(--ink); font-size: 14px;
}
.line-item .muted { white-space: nowrap; }

/* ---------- 热门实体 ---------- */
.chip {
  display: inline-block; background: var(--blue-soft); color: var(--blue); border: 1px solid var(--blue-border);
  border-radius: 18px; padding: 6px 16px; margin: 0 8px 10px 0; font-size: 14px;
}
.chip:hover { background: var(--blue); color: #fff; }
.chip.mini { padding: 2px 10px; font-size: 12.5px; margin: 0 4px 4px 0; }

/* ---------- 卡片 ---------- */
.card-grid, #company-box, #project-box, #policy-box, #glossary-box, #report-box, #search-result {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
#search-result { grid-template-columns: repeat(2, 1fr); }
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; display: flex; flex-direction: column; gap: 6px; box-shadow: var(--shadow);
}
.card h3 { font-size: 16px; color: var(--ink); }
.card-top { display: flex; gap: 6px; flex-wrap: wrap; }
.card p { font-size: 13.5px; }
.card-foot { margin-top: auto; padding-top: 8px; }
.full-name { font-size: 12.5px; color: var(--muted); margin-bottom: 2px; }
.zh-name { color: var(--blue); font-weight: 600; font-size: 14px; }
.tag { font-size: 12px; padding: 2px 10px; border-radius: 12px; font-weight: 500; }
.tag-blue { background: var(--blue-soft); color: var(--blue); }
.tag-green { background: #ecfdf5; color: var(--green); }
.tag-orange { background: #fffbeb; color: var(--orange); }
.tag-red { background: #fef2f2; color: var(--red); }
.tag-gray { background: var(--bg-soft); color: var(--gray); }

/* ---------- 筛选条 ---------- */
.filter-bar {
  display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 22px;
  background: var(--bg-soft); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px;
}
.filter-bar select, .filter-bar input {
  padding: 9px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px;
  background: #fff; color: var(--ink); min-width: 130px;
}
.filter-bar input { flex: 1; min-width: 180px; }
.filter-bar select:focus, .filter-bar input:focus { outline: 2px solid var(--blue-border); border-color: var(--blue); }

/* ---------- 产业赛道页 ---------- */
.track-section { margin-bottom: 44px; }
.track-head { display: flex; align-items: center; margin-bottom: 16px; }
.track-head h2 { color: var(--tc, var(--blue)); font-size: 22px; }
.sub-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.sub-card h4 { color: var(--tc, var(--blue)); }
.sub-links { display: flex; gap: 14px; margin-top: 8px; flex-wrap: wrap; }
.sub-links a { font-size: 13px; }

/* ---------- 数据中心 ---------- */
.data-card { grid-column: span 1; }
.trend-svg { width: 100%; height: auto; margin: 8px 0; }
.data-table { border-collapse: collapse; width: 100%; font-size: 12.5px; margin-top: 6px; }
.data-table th, .data-table td { border: 1px solid var(--border); padding: 6px 8px; text-align: center; }
.data-table th { background: var(--blue-soft); color: var(--blue-deep); }
.data-table.wide { font-size: 14px; }
.data-table.wide td { text-align: left; }
#price-box { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.data-block { margin-top: 36px; }
.data-block h2 { font-size: 20px; margin-bottom: 14px; color: var(--blue-deep); }

/* ---------- 产业链图谱 ---------- */
.chain-tabs { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 26px; }
.chain-tab {
  background: #fff; border: 1.5px solid var(--border); border-radius: 22px; padding: 9px 20px;
  font-size: 14px; cursor: pointer; color: var(--ink);
}
.chain-tab.active { border-color: var(--tc, var(--blue)); color: var(--tc, var(--blue)); background: #fff; font-weight: 600; }
.chain-title { font-size: 18px; font-weight: 700; margin-bottom: 20px; display: flex; align-items: center; gap: 8px; }
.chain-title .dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; }
.chain-flow { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin-bottom: 20px; }
.chain-node {
  background: #fff; border: 2px solid var(--tc, var(--blue)); color: var(--tc, var(--blue));
  border-radius: 10px; padding: 12px 18px; font-size: 14.5px; font-weight: 600;
}
.chain-node:hover { background: var(--tc, var(--blue)); color: #fff; }
.chain-arrow { color: var(--muted); font-size: 18px; margin: 0 4px; }

/* ---------- 信源说明条（首页底部） ---------- */
.source-note {
  background: linear-gradient(135deg, var(--blue-deep), var(--blue)); color: #fff;
  border-radius: var(--radius); padding: 30px; margin: 40px 0;
}
.source-note h3 { font-size: 19px; margin-bottom: 10px; }
.source-note p { opacity: .92; font-size: 14px; }
.source-note .btn { background: #fff; color: var(--blue-deep); margin-top: 14px; }

/* ---------- 页脚 ---------- */
.site-foot { background: #0f2a5f; color: #cbd5e1; margin-top: 56px; }
.foot-top { display: grid; grid-template-columns: 1.2fr 1fr 1.3fr; gap: 30px; padding: 36px 0 26px; }
.foot-tag { font-size: 13px; margin-top: 6px; opacity: .85; }
.foot-contact div, .foot-links div { margin-bottom: 8px; font-size: 14px; }
.foot-links a { color: #93c5fd; }
.foot-bottom { border-top: 1px solid rgba(255,255,255,.12); padding: 16px 0 22px; font-size: 12.5px; }
.foot-disc { opacity: .75; margin-top: 6px; max-width: 900px; }

/* ---------- 会员页 ---------- */
.auth-box { max-width: 460px; margin: 40px auto; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 28px; }
.auth-tabs { display: flex; gap: 8px; margin-bottom: 20px; }
.auth-tabs button {
  flex: 1; padding: 10px; border: 1.5px solid var(--border); background: #fff; border-radius: 10px;
  font-size: 15px; cursor: pointer; color: var(--muted);
}
.auth-tabs button.on { border-color: var(--blue); color: var(--blue); background: var(--blue-soft); font-weight: 600; }
.auth-box label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; }
.auth-box input { width: 100%; padding: 11px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 15px; }
.auth-box input:focus { outline: 2px solid var(--blue-border); border-color: var(--blue); }
.auth-box .btn { width: 100%; margin-top: 18px; border: none; cursor: pointer; }
.auth-msg, .form-msg { font-size: 13px; margin-top: 10px; min-height: 18px; }
.auth-msg.ok, .form-msg.ok { color: var(--green); }
.auth-msg.err, .form-msg.err { color: var(--red); }
.member-panel { display: none; }
.member-welcome { background: var(--blue-soft); border: 1px solid var(--blue-border); border-radius: var(--radius); padding: 22px; margin-bottom: 18px; }
.member-feats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

/* ---------- AI 信源入口页 ---------- */
.code-block {
  background: #0f2a5f; color: #e2e8f0; border-radius: 10px; padding: 16px 18px;
  font-family: Consolas, Menlo, monospace; font-size: 13px; overflow-x: auto; margin: 12px 0;
  white-space: pre;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .main-nav a { padding: 6px 6px; font-size: 13px; }
  .track-grid { grid-template-columns: repeat(3, 1fr); }
  .dash-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .burger { display: block; }
  .main-nav {
    display: none; position: absolute; top: 62px; left: 0; right: 0; background: #fff;
    flex-direction: column; padding: 10px 20px 16px; border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 4px; border-bottom: 1px solid var(--bg-soft); font-size: 15px; }
  .tool-link:not(.ai-link) { display: none; }
  .card-grid, #company-box, #project-box, #policy-box, #glossary-box, #report-box, #search-result,
  .latest-grid, .sub-grid, .member-feats, #price-box { grid-template-columns: 1fr; }
  .track-grid { grid-template-columns: repeat(2, 1fr); }
  .foot-top { grid-template-columns: 1fr; }
  .hero h1 { font-size: 26px; }
  .hero { padding: 40px 0 36px; }
  .dash-grid { margin-top: -24px; }
  .lang-btn { max-width: 120px; overflow: hidden; text-overflow: ellipsis; }
}