:root{
  --bg:#eef3ff;
  --text:#10203a;
  --muted:#61708a;
  --line:rgba(15,23,42,.08);
  --card:rgba(255,255,255,.78);
  --blue:#4763f5;
  --shadow:0 24px 70px rgba(15,23,42,.12);
  --shadow-strong:0 30px 120px rgba(15,23,42,.18);
}
*{box-sizing:border-box}
html,body{min-height:100%}
body{
  margin:0;
  font-family:"SF Pro Display","PingFang SC","Segoe UI","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 12% 14%, rgba(95,113,255,.16), transparent 28%),
    radial-gradient(circle at 88% 12%, rgba(122,203,255,.22), transparent 24%),
    linear-gradient(180deg,#f7f9ff 0%,#edf2ff 100%);
}
a{text-decoration:none;color:inherit}
button{font:inherit}
img,video{display:block;max-width:100%}
.page-shell{width:min(1180px,calc(100% - 32px));margin:22px auto 36px;display:grid;gap:20px}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.back-link,.ghost-link,.primary-btn,.primary-link{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 16px;border-radius:999px;border:1px solid var(--line);font-weight:700;font-size:.92rem;transition:.22s}
.back-link,.ghost-link{background:rgba(255,255,255,.86)}
.primary-btn,.primary-link{background:linear-gradient(135deg,#4b67ff,#7190ff);color:#fff;border-color:transparent;cursor:pointer;box-shadow:0 14px 24px rgba(71,99,245,.18)}
.back-link:hover,.ghost-link:hover,.primary-btn:hover,.primary-link:hover{transform:translateY(-1px);box-shadow:0 12px 20px rgba(71,99,245,.12)}
.hero-card,.overview-card,.other-card{background:var(--card);border:1px solid rgba(255,255,255,.62);backdrop-filter:blur(18px);box-shadow:var(--shadow);border-radius:34px}
.hero-card{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:24px;padding:24px}
.hero-copy{display:flex;flex-direction:column;gap:18px;justify-content:center}
.eyebrow{display:inline-flex;align-items:center;padding:7px 11px;border-radius:999px;background:rgba(71,99,245,.08);color:#3d56e8;font-weight:800;font-size:.8rem;letter-spacing:.12em;text-transform:uppercase;align-self:flex-start}
h1{margin:0;font-size:2.3rem;line-height:1.02;letter-spacing:-.04em}
.lead{margin:0;color:var(--muted);font-size:1rem;line-height:1.75}
.meta-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.meta-box{padding:16px;border-radius:20px;background:#f7faff;border:1px solid var(--line);display:grid;gap:6px}
.meta-box span{color:var(--muted);font-size:.86rem}
.meta-box strong{font-size:1rem;line-height:1.5;word-break:break-word}
.summary-panel{display:grid;align-content:start;gap:14px}
.notice{display:grid;gap:8px;padding:16px 18px;border-radius:22px;background:rgba(255,255,255,.84);border:1px solid var(--line);color:var(--muted);line-height:1.7}
.notice strong{color:var(--text);font-size:1rem}
.notice code{padding:3px 8px;border-radius:999px;background:rgba(71,99,245,.08);color:#3550ea;font-family:Consolas,monospace;font-size:.88rem}
.action-row{display:flex;flex-wrap:wrap;gap:12px}
.copy-status{margin:0;color:var(--muted);font-size:.92rem;line-height:1.6}
.player-wrap{padding:18px;border-radius:28px;background:linear-gradient(180deg,#091224,#132643);box-shadow:var(--shadow-strong);display:flex;flex-direction:column;justify-content:center}
.player-wrap video{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:20px;background:#000}
.player-caption{margin:12px 2px 0;color:rgba(255,255,255,.74);font-size:.9rem;line-height:1.6}
.overview-card,.other-card{padding:20px}
.section-title{margin:0 0 14px;font-size:1.1rem}
.overview-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.overview-item{display:grid;gap:14px;padding:18px;border-radius:24px;background:rgba(255,255,255,.82);border:1px solid var(--line);transition:.22s}
.overview-item.is-current{border-color:rgba(71,99,245,.42);box-shadow:0 14px 28px rgba(71,99,245,.12);background:rgba(247,249,255,.98)}
.route-chip{display:inline-flex;align-items:center;align-self:flex-start;padding:6px 10px;border-radius:999px;background:rgba(71,99,245,.08);color:#3d56e8;font-weight:800;font-size:.8rem}
.overview-item h3{margin:0;font-size:1.1rem}
.overview-item p{margin:0;color:var(--muted);line-height:1.7}
.overview-meta{display:grid;gap:4px;color:var(--muted);font-size:.88rem}
.overview-actions{display:flex;flex-wrap:wrap;gap:10px}
@media (max-width:980px){
  .hero-card{grid-template-columns:1fr}
  .meta-grid{grid-template-columns:1fr}
  .overview-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .page-shell{width:calc(100% - 18px);margin:14px auto 24px;gap:14px}
  .hero-card,.overview-card,.other-card{border-radius:26px}
  .hero-card{padding:18px;gap:18px}
  h1{font-size:1.82rem}
  .lead{font-size:.96rem}
  .player-wrap{padding:14px;border-radius:22px}
}
@media (max-width:520px){
  .page-shell{width:calc(100% - 12px);margin:10px auto 18px}
  .hero-card,.overview-card,.other-card{border-radius:22px}
  .hero-card,.overview-card,.other-card{padding:16px}
  .back-link,.ghost-link,.primary-btn,.primary-link{width:100%}
  .action-row,.overview-actions,.topbar{display:grid;grid-template-columns:1fr}
  h1{font-size:1.56rem}
}