:root {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --ink: #1f2937;
  --muted: #667085;
  --soft: #eef2f7;
  --line: #e4e7ec;
  --brand: #2d3b55;
  --brand-2: #5b6f91;
  --accent: #f3a76d;
  --radius: 22px;
  --shadow: 0 18px 48px rgba(31, 41, 55, .08);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.72;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.skip-link {
  position: absolute; left: -999px; top: 12px; background: #fff; padding: 8px 12px; border-radius: 8px;
}
.skip-link:focus { left: 12px; z-index: 999; }
.site-header {
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 30;
}
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 0;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-wrap img { width: 152px; }
.logo-text small { color: var(--muted); display: block; margin-top: -4px; }
.domain-chip {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--soft);
  color: var(--brand);
  font-size: 14px;
  white-space: nowrap;
}
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0 0 14px;
}
.nav a {
  padding: 9px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 600;
}
.nav a:hover, .btn:hover, .card:hover { transform: translateY(-2px); }
.search-zone {
  padding: 0 0 16px;
}
.search-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  background: #fff;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
}
.search-form input {
  border: 0;
  outline: 0;
  padding: 12px 14px;
  font-size: 16px;
  background: #f8fafc;
  border-radius: 12px;
}
button, .btn {
  border: 0;
  cursor: pointer;
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  transition: .2s ease;
}
.btn.secondary { background: var(--soft); color: var(--brand); }
.btn.ghost { background: transparent; color: var(--brand); border: 1px solid var(--line); }
.hero {
  padding: 44px 0 28px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 24px;
  align-items: stretch;
}
.hero-panel {
  background: linear-gradient(145deg, #ffffff, #eef3ff);
  border: 1px solid var(--line);
  border-radius: 30px;
  padding: clamp(24px, 4vw, 44px);
  box-shadow: var(--shadow);
}
.eyebrow {
  color: var(--brand-2);
  font-weight: 800;
  letter-spacing: .08em;
}
h1, h2, h3 { line-height: 1.25; margin: 0 0 14px; }
h1 { font-size: clamp(30px, 5vw, 54px); }
h2 { font-size: clamp(24px, 3vw, 34px); }
h3 { font-size: 20px; }
.hero p, .section-desc { color: var(--muted); margin: 0 0 18px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.kpis {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 28px;
}
.kpi {
  background: rgba(255,255,255,.82);
  border: 1px solid var(--line);
  padding: 14px;
  border-radius: 18px;
}
.kpi strong { display:block; font-size: 22px; }
.video-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
  position: relative;
  min-height: 100%;
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}
.video-thumb img { width: 100%; height: 100%; object-fit: cover; transition: .3s ease; }
.video-thumb video { width: 100%; height: 100%; object-fit: cover; display: none; }
.play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #fff;
  background: rgba(31,41,55,.18);
}
.play span {
  width: 70px;
  height: 70px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: rgba(31,41,55,.72);
  font-size: 26px;
}
.video-card:hover .video-thumb img { transform: scale(1.04); filter: saturate(1.06); }
.video-card:hover .play { background: rgba(31,41,55,.28); }
.card-body { padding: 20px; }
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: var(--muted);
  font-size: 14px;
}
.tags { display:flex; flex-wrap:wrap; gap:8px; margin: 12px 0; }
.tag {
  background: #f3f5f9;
  color: #3a4a63;
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 13px;
}
.section {
  padding: 26px 0;
}
.section-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 18px;
}
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.card, .info-panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  transition: .2s ease;
  box-shadow: 0 12px 28px rgba(31,41,55,.04);
}
.list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.list li {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fbfcfe;
}
.module-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.module-card .heat { color: var(--accent); font-weight: 800; }
.actions {
  display:flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.icon-btn {
  background: #f3f5f9;
  color: var(--brand);
  padding: 9px 11px;
  border-radius: 999px;
  font-size: 14px;
}
.author-card {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 12px;
  align-items: start;
}
.avatar {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 900;
}
.notice {
  background: #fff8ef;
  border: 1px solid #f7ddbf;
  border-radius: 20px;
  padding: 18px;
}
.breadcrumb {
  font-size: 14px;
  color: var(--muted);
  margin: 20px 0 6px;
}
.article {
  background:#fff;
  border:1px solid var(--line);
  border-radius: 28px;
  padding: clamp(20px, 4vw, 42px);
  box-shadow: var(--shadow);
}
.article figure {
  margin: 22px 0;
}
.article figcaption, .image-description {
  font-size: 14px;
  color: var(--muted);
  margin-top: 8px;
}
.article h1 { font-size: clamp(28px,4vw,46px); }
.article-content p { margin: 0 0 16px; }
.faq details {
  background:#fff;
  border:1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
}
.faq details + details { margin-top: 10px; }
.faq summary { cursor: pointer; font-weight: 800; }
.form-grid { display:grid; gap:12px; }
.form-grid input, .form-grid textarea, .form-grid select {
  width:100%;
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px 14px;
  font: inherit;
  background:#fbfcfe;
}
.site-footer {
  margin-top: 40px;
  padding: 34px 0;
  background: #1f2937;
  color: #eef2f7;
}
.footer-grid {
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  align-items: center;
}
.site-footer img { width: 150px; }
.site-footer a { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.footer-links { display:flex; gap:12px; flex-wrap:wrap; justify-content:flex-end; }
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  background: #1f2937;
  color: #fff;
  padding: 12px 16px;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: .2s ease;
  z-index: 100;
}
.toast.show { opacity: 1; }
.ad-placeholder {
  border: 1px dashed #cbd5e1;
  color: var(--muted);
  background: #f8fafc;
  padding: 10px;
  text-align: center;
  border-radius: 14px;
  font-size: 13px;
}
@media (max-width: 920px) {
  .hero-grid, .grid-3, .grid-2, .module-grid, .footer-grid { grid-template-columns: 1fr; }
  .section-head { align-items: start; flex-direction: column; }
  .kpis { grid-template-columns: 1fr; }
  .footer-links { justify-content:flex-start; }
  .topbar { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 560px) {
  .container { width: min(100% - 22px, 1180px); }
  .nav { overflow-x:auto; flex-wrap: nowrap; padding-bottom: 12px; }
  .nav a { white-space: nowrap; }
  .search-form { grid-template-columns: 1fr; }
  .hero { padding-top: 26px; }
}