*,*::before,*::after{box-sizing:border-box}
body{margin:0;font-family:"PingFang SC","Microsoft YaHei",sans-serif;color:#1a1a1a;background:#fff;line-height:1.78}
img{display:block;max-width:100%;height:auto}
a{color:#1d4ed8;text-decoration:none}
a:hover{text-decoration:underline}
.w{width:min(1100px,calc(100% - 32px));margin:0 auto}

.bar{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid #e5e5e5}
.bar-in{display:flex;align-items:center;justify-content:space-between;min-height:62px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px;color:#111}
.logo img{width:38px;border-radius:10px}
.nav{display:flex;gap:16px;align-items:center}
.nav a{color:#555;font-size:14px}
.ham{display:none;border:1px solid #ddd;background:#fff;border-radius:8px;padding:8px 12px;cursor:pointer}
.mnav{display:none;flex-direction:column;padding:12px 16px 18px;border-top:1px solid #eee;background:#fff}
.mnav.on{display:flex}
.mnav a{padding:10px 0;border-bottom:1px solid #f4f4f4;color:#444;font-size:14px}

.hero{padding:44px 0 20px;text-align:center}
.hero h1{font-size:clamp(26px,4vw,36px);line-height:1.3;margin:0 0 14px;color:#111}
.hero .lead{color:#555;font-size:16px;max-width:720px;margin:0 auto 8px}

/* Horizontal timeline — dots + events on a scrollable rail */
.h-timeline-wrap{margin:24px 0 40px}
.h-timeline-hint{text-align:center;font-size:13px;color:#888;margin:0 0 12px;letter-spacing:.04em}
.h-timeline{overflow-x:auto;overflow-y:hidden;-webkit-overflow-scrolling:touch;scroll-snap-type:x proximity;padding:0 0 12px;scrollbar-color:#bfdbfe #f1f5f9;scrollbar-width:thin}
.h-timeline::-webkit-scrollbar{height:8px}
.h-timeline::-webkit-scrollbar-track{background:#f1f5f9;border-radius:4px}
.h-timeline::-webkit-scrollbar-thumb{background:#93c5fd;border-radius:4px}
.h-timeline-rail{display:flex;align-items:center;min-width:max-content;position:relative;padding:140px 48px 140px;margin:0 auto}
.h-timeline-rail::before{content:"";position:absolute;left:48px;right:48px;top:50%;height:3px;transform:translateY(-50%);background:linear-gradient(90deg,#2563eb 0%,#60a5fa 45%,#93c5fd 75%,#dbeafe 100%);border-radius:3px;z-index:0}
.h-event{flex:0 0 300px;position:relative;height:0;padding-top:0;scroll-snap-align:center}
.h-dot{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:22px;height:22px;border-radius:50%;background:#2563eb;border:3px solid #fff;box-shadow:0 0 0 3px #bfdbfe;z-index:2;transition:transform .2s,box-shadow .2s}
.h-event:hover .h-dot,.h-event:focus-within .h-dot{transform:translate(-50%,-50%) scale(1.12);box-shadow:0 0 0 5px #93c5fd}
.h-card{position:absolute;left:50%;transform:translateX(-50%);width:272px;border:1px solid #e8e8e8;border-radius:14px;padding:18px 20px;background:#fff;box-shadow:0 4px 16px rgba(37,99,235,.06);z-index:1}
.h-event:nth-child(odd) .h-card{bottom:calc(50% + 28px)}
.h-event:nth-child(even) .h-card{top:calc(50% + 28px)}
.h-event:nth-child(odd) .h-card::after,.h-event:nth-child(even) .h-card::after{content:"";position:absolute;left:50%;transform:translateX(-50%);width:2px;height:18px;background:#bfdbfe}
.h-event:nth-child(odd) .h-card::after{bottom:-18px}
.h-event:nth-child(even) .h-card::after{top:-18px}
.h-tag{display:inline-block;font-size:11px;font-weight:600;color:#2563eb;background:#eff6ff;padding:3px 9px;border-radius:20px;margin-bottom:8px;letter-spacing:.03em}
.h-card h2{margin:0 0 8px;font-size:17px;line-height:1.35;color:#111}
.h-card p{margin:0 0 10px;color:#444;font-size:14px;line-height:1.65}
.h-card p:last-child{margin-bottom:0}
.h-card .h-img{margin-top:10px;border-radius:8px;overflow:hidden;border:1px solid #eee}
.h-card .h-img img{width:100%;max-height:140px;object-fit:cover}

.timeline-detail{padding:32px 0 16px;border-top:1px solid #f0f0f0}
.timeline-detail h2{font-size:22px;margin:0 0 16px;color:#111}
.timeline-detail p{color:#444;font-size:15px;margin:0 0 14px}
.detail-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:20px 0}
.detail-grid figure{margin:0;border:1px solid #eee;border-radius:10px;overflow:hidden;background:#fafafa}
.detail-grid figcaption{padding:8px 10px;font-size:12px;color:#666}
.detail-grid img{aspect-ratio:9/16;object-fit:cover;width:100%}

.section-head{padding:36px 0 8px;border-top:1px solid #f0f0f0;margin-top:8px}
.section-head h2{font-size:24px;margin:0 0 8px}
.faq details{border:1px solid #ececec;border-radius:10px;padding:14px 18px;margin-bottom:10px;background:#fafafa}
.faq summary{font-weight:600;cursor:pointer;color:#222}
.faq p{margin:10px 0 0;color:#555;font-size:14px}

.prose{padding:40px 0 56px}
.prose h1{font-size:28px;margin:0 0 16px}
.prose h2{font-size:20px;margin:28px 0 12px;color:#222}
.prose p,.prose li{color:#444;font-size:15px}
.prose ul{padding-left:20px}
.related{margin-top:36px;padding:20px;border:1px solid #e8e8e8;border-radius:12px;background:#f9fafb}
.related h3{margin:0 0 12px;font-size:16px}
.related a{display:block;padding:6px 0;color:#2563eb;font-size:14px}

.ftr{padding:36px 0;background:#fafafa;border-top:1px solid #eee;font-size:13px;color:#888}
.ftr a{color:#666;margin-right:14px}
.err{min-height:60vh;display:grid;place-items:center;text-align:center;padding:40px 16px}
.err h1{font-size:48px;margin:0 0 12px;color:#ccc}

@media(max-width:720px){
  .h-timeline-rail{padding:120px 24px 120px}
  .h-timeline-rail::before{left:24px;right:24px}
  .h-event{flex:0 0 260px}
  .h-card{width:240px;padding:14px 16px}
  .h-card h2{font-size:15px}
  .detail-grid{grid-template-columns:1fr}
  .ham{display:inline-flex}
  .nav{display:none}
}