/* ==========================================================================
   解决方案：列表（图文交错的滚动叙事）+ 详情（方案架构图）
   ========================================================================== */

/* ---------- 列表 ---------- */
.sol-list { display: flex; flex-direction: column; gap: clamp(72px, 9vw, 128px); }
.sol {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: clamp(32px, 5vw, 80px); align-items: center;
}
.sol:nth-child(even) .sol__visual { order: -1; }
@media (max-width: 960px) {
  .sol { grid-template-columns: minmax(0, 1fr); }
  .sol:nth-child(even) .sol__visual { order: 0; }
}
.sol__copy { display: flex; flex-direction: column; gap: 20px; min-width: 0; }
.sol__index { display: flex; align-items: center; gap: 14px; font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.12em; color: var(--c-lemon); }
.sol__index::after { content: ""; flex: 1; max-width: 120px; height: 1px; background: linear-gradient(90deg, var(--c-lemon), transparent); }
.sol__title { font-size: clamp(28px, 3.2vw, 42px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; }
.sol__for { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-family: var(--font-body); font-size: 13px; color: var(--c-dim); }
.sol__visual { position: relative; min-width: 0; }
.sol__visual::before {
  content: ""; position: absolute; inset: 10% 5%; z-index: -1; border-radius: 50%;
  background: radial-gradient(circle, rgba(215, 249, 74, 0.12), transparent 65%); filter: blur(20px);
}


/* ---------- 详情：方案架构 ---------- */
.arch {
  display: grid; align-items: center; gap: 0;
  grid-template-columns: minmax(0, 1fr) 72px minmax(0, 1.25fr) 72px minmax(0, 1fr);
}
.arch__col { position: relative; display: flex; flex-direction: column; gap: 10px; }
/* 标签浮在列上方，列高 = 条目高度之和，保证连线端点与条目中心对齐（条目高 52、间距 10） */
.arch__label { position: absolute; left: 0; bottom: 100%; margin-bottom: 10px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.14em; color: var(--c-dim); }
.arch__item {
  display: flex; align-items: center; gap: 10px; height: 52px; padding: 0 16px; border-radius: var(--r-sm);
  background: var(--c-surface); border: 1px solid var(--c-line-2); font-size: 14px; color: var(--c-text-2);
  transition: border-color var(--dur-fast), color var(--dur-fast), transform var(--dur) var(--ease-out);
}
.arch__item:hover { border-color: rgba(215, 249, 74, 0.5); color: var(--c-text); transform: translateX(3px); }
.arch__item i { width: 8px; height: 8px; flex: none; border-radius: 2px; background: var(--c-cyan); }
.arch__hub {
  position: relative; display: flex; flex-direction: column; gap: 16px; padding: 28px; border-radius: 24px;
  border: 1px solid rgba(215, 249, 74, 0.35);
  background: linear-gradient(180deg, rgba(215, 249, 74, 0.08), #0c0e11 70%);
  box-shadow: 0 0 90px -40px rgba(215, 249, 74, 0.55);
}
.arch__hub-title { display: flex; align-items: center; gap: 12px; font-size: 18px; font-weight: 700; }
.arch__hub-ic { width: 40px; height: 40px; border-radius: 12px; display: inline-flex; align-items: center; justify-content: center; background: var(--c-lemon); color: var(--c-on-lemon); }
.arch__mods { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.arch__mod { padding: 14px; border-radius: var(--r-sm); background: rgba(255, 255, 255, 0.03); border: 1px solid var(--c-line); display: flex; flex-direction: column; gap: 4px; }
.arch__mod b { font-size: 14px; font-weight: 600; }
.arch__mod span { font-family: var(--font-body); font-size: 12px; line-height: 1.6; color: var(--c-muted); }
.arch__link { position: relative; height: 238px; }
.arch__link svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.arch__link path { fill: none; stroke: rgba(255, 255, 255, 0.16); stroke-width: 1.2; vector-effect: non-scaling-stroke; }
.arch__link .arch__comet { stroke: var(--c-lemon); stroke-width: 2.2; stroke-linecap: round; stroke-dasharray: 0.16 0.84; stroke-dashoffset: 1; opacity: 0; animation: arch-comet 2.4s linear infinite; animation-delay: var(--d, 0s); }
@keyframes arch-comet { 0% { stroke-dashoffset: 1; opacity: 0; } 10%, 90% { opacity: 1; } 100% { stroke-dashoffset: 0; opacity: 0; } }
@media (max-width: 960px) {
  .arch { grid-template-columns: minmax(0, 1fr); }
  .arch__label { position: static; margin-bottom: 0; }
  .arch__link { height: 48px; }
  .arch__link svg { display: none; }
  .arch__link::before { content: ""; position: absolute; left: 50%; top: 6px; bottom: 6px; width: 1px; background: linear-gradient(180deg, transparent, var(--c-lemon), transparent); }
}
@media (max-width: 520px) { .arch__mods { grid-template-columns: minmax(0, 1fr); } }