/* 案例 / 产品详情页共用样式。只用 tokens.css 的变量；每页私有样式写在自己目录的 page.css，选择器以 .cs- 之外的前缀开头。
   节奏：页头（标题 + 事实条 + 主物件）→ 区块左边是编号和标题（桌面上吸顶），右边是内容 → 下一个案例。 */

.cs-page { --cs-accent: var(--amber); }
.cs-page main { padding-top: var(--nav-h); }

/* ---------- 页头 ---------- */
.cs-hero { position: relative; padding: clamp(48px, 7vw, 96px) 0 0; }
.cs-crumb { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; font-size: var(--fs-small); color: var(--ink-3); }
.cs-crumb a { color: var(--ink-2); transition: color .2s var(--ease); }
.cs-crumb a:hover { color: var(--ink-1); }
.cs-crumb i { width: 4px; height: 4px; border-radius: 50%; background: var(--ink-4); }
.cs-status { display: inline-flex; align-items: center; gap: 8px; height: 26px; padding: 0 11px; border-radius: 13px;
  border: 1px solid var(--line-strong); font-size: 13px; color: var(--ink-2); }
.cs-status::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cs-accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--cs-accent) 18%, transparent); }
.cs-status[data-live]::before { animation: cs-pulse 2.4s var(--ease) infinite; }
@keyframes cs-pulse { 50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--cs-accent) 0%, transparent); } }

.cs-title { margin-top: 22px; font-size: clamp(38px, 5.4vw, 76px); line-height: 1.08; font-weight: 700; letter-spacing: -0.02em; max-width: 14em; }
.cs-lede { margin-top: 24px; max-width: 34em; font-size: clamp(17px, 1.35vw, 20px); line-height: 1.75; color: var(--ink-2); }

.cs-facts { margin: clamp(36px, 4vw, 56px) 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line); }
.cs-facts li { padding: 18px 24px 0 0; display: grid; gap: 6px; min-width: 0; }
.cs-facts li + li { padding-left: 24px; border-left: 1px solid var(--line); }
.cs-facts span { font-size: var(--fs-label); color: var(--ink-3); letter-spacing: .04em; }
.cs-facts b { font-weight: 500; font-size: 15px; color: var(--ink-1); line-height: 1.5; }

/* 页头主物件：每页自己画，外框统一 */
.cs-stage { position: relative; margin-top: clamp(40px, 5vw, 72px); border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  background: radial-gradient(120% 90% at 50% 0%, var(--surface) 0%, var(--bg-raised) 55%, var(--bg) 100%); }
.cs-stage-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; padding: 14px 20px; border-top: 1px solid var(--line);
  font-size: var(--fs-small); color: var(--ink-3); background: rgba(14,16,18,.6); }
.cs-stage-bar b { color: var(--ink-1); font-weight: 600; }
.cs-note { font-size: var(--fs-label); color: var(--ink-4); }

/* ---------- 区块 ---------- */
.cs-sec { padding: var(--section-y) 0 0; scroll-margin-top: var(--nav-h); }
.cs-sec > .hl-wrap { display: grid; grid-template-columns: minmax(220px, 4fr) minmax(0, 9fr); gap: 32px clamp(32px, 5vw, 80px); align-items: start; }
.cs-sec-head { position: sticky; top: calc(var(--nav-h) + 32px); }
.cs-sec-no { font-size: var(--fs-small); color: var(--cs-accent); letter-spacing: .08em; font-variant-numeric: tabular-nums; }
.cs-sec-head h2 { margin-top: 12px; font-size: clamp(26px, 2.4vw, 36px); line-height: 1.2; }
.cs-sec-head p { margin-top: 14px; font-size: 15px; color: var(--ink-3); line-height: 1.75; }
.cs-sec-body { min-width: 0; }
.cs-sec--wide > .hl-wrap { grid-template-columns: 1fr; }
.cs-sec--wide .cs-sec-head { position: static; max-width: 40em; }

/* 要解决的问题：编号行 */
.cs-problems { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; counter-reset: p; }
.cs-problems li { display: grid; grid-template-columns: 56px 1fr; gap: 4px 20px; padding: 26px 0; border-top: 1px solid var(--line); counter-increment: p; }
.cs-problems li:last-child { border-bottom: 1px solid var(--line); }
.cs-problems li::before { content: counter(p, decimal-leading-zero); grid-row: span 2; font-size: 28px; font-weight: 300; color: var(--ink-4); line-height: 1.1; font-variant-numeric: tabular-nums; }
.cs-problems b { font-size: 19px; font-weight: 600; line-height: 1.45; }
.cs-problems p { color: var(--ink-2); font-size: 15px; }

/* 模块清单：按端分组 */
.cs-modules { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-panel); overflow: hidden; }
.cs-mod { background: var(--bg-raised); padding: 24px 26px 26px; transition: background .25s var(--ease); }
.cs-mod:hover { background: var(--surface); }
.cs-mod h3 { display: flex; align-items: baseline; gap: 10px; font-size: 18px; }
.cs-mod h3 small { font-size: var(--fs-label); font-weight: 400; color: var(--ink-3); }
.cs-mod ul { list-style: none; margin: 14px 0 0; padding: 0; display: grid; gap: 8px; }
.cs-mod li { position: relative; padding-left: 16px; font-size: 15px; color: var(--ink-2); line-height: 1.6; }
.cs-mod li::before { content: ""; position: absolute; left: 0; top: .72em; width: 6px; height: 1px; background: var(--ink-4); }
.cs-mod--span { grid-column: 1 / -1; }

/* 难点 → 做法 */
.cs-points { display: grid; gap: 16px; }
.cs-point { display: grid; grid-template-columns: minmax(0, 1fr) 28px minmax(0, 1.25fr); align-items: start; gap: 18px; padding: 24px; border: 1px solid var(--line); border-radius: var(--r-panel); background: var(--bg-raised); }
.cs-point .k { font-size: var(--fs-label); color: var(--ink-3); letter-spacing: .04em; }
.cs-point b { display: block; margin-top: 6px; font-size: 17px; font-weight: 600; line-height: 1.5; }
.cs-point p { margin-top: 6px; color: var(--ink-2); font-size: 15px; }
.cs-point svg { margin-top: 26px; color: var(--cs-accent); }

/* 当地要求：两列表 */
.cs-region { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0 40px; margin: 0; }
.cs-region > div { display: grid; grid-template-columns: 84px 1fr; gap: 12px; padding: 16px 0; border-top: 1px solid var(--line); }
.cs-region dt { font-size: var(--fs-small); color: var(--ink-3); }
.cs-region dd { margin: 0; font-size: 15px; color: var(--ink-1); }
.cs-region dd small { display: block; color: var(--ink-3); font-size: var(--fs-label); margin-top: 2px; }
.cs-clock { font-variant-numeric: tabular-nums; }

/* 截图组 */
.cs-shots { display: flex; gap: clamp(16px, 2.4vw, 32px); align-items: flex-end; }
.cs-shot { margin: 0; flex: 1 1 0; min-width: 0; }
.cs-shot .frame { border-radius: 22px; padding: 8px; background: #050607; border: 1px solid var(--line-strong);
  box-shadow: 0 40px 80px -40px rgba(0,0,0,.8); overflow: hidden; }
.cs-shot img { width: 100%; height: auto; border-radius: 15px; }
.cs-shot figcaption { margin-top: 14px; display: grid; gap: 2px; }
.cs-shot figcaption b { font-size: 15px; }
.cs-shot figcaption span { font-size: var(--fs-small); color: var(--ink-3); }

/* ---------- 下一个 / 联系 ---------- */
.cs-end { padding: var(--section-y) 0; }
.cs-end .hl-wrap { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 20px; }
.cs-next, .cs-cta { position: relative; display: flex; flex-direction: column; justify-content: space-between; gap: 40px; min-height: 260px;
  padding: clamp(24px, 3vw, 40px); border: 1px solid var(--line); border-radius: 16px; background: var(--bg-raised); overflow: hidden;
  transition: border-color .3s var(--ease), background .3s var(--ease); }
.cs-next:hover { border-color: var(--line-strong); background: var(--surface); }
.cs-next .k, .cs-cta .k { font-size: var(--fs-small); color: var(--ink-3); }
.cs-next b { display: block; margin-top: 10px; font-size: clamp(26px, 2.6vw, 38px); line-height: 1.2; font-weight: 650; }
.cs-next p { margin-top: 10px; color: var(--ink-2); max-width: 26em; }
.cs-next .go { display: inline-flex; align-items: center; gap: 10px; font-weight: 600; }
.cs-next .go svg { transition: transform .3s var(--ease); }
.cs-next:hover .go svg { transform: translateX(6px); }
.cs-cta b { display: block; margin-top: 10px; font-size: 24px; line-height: 1.35; font-weight: 650; }
.cs-cta .hl-btn { align-self: flex-start; }

/* 进入视口时淡入上移；减少动态时直接显示 */
[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
[data-reveal].is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .cs-status[data-live]::before { animation: none; }
}

/* ---------- 窄屏 ---------- */
@media (max-width: 960px) {
  .cs-sec > .hl-wrap { grid-template-columns: 1fr; }
  .cs-sec-head { position: static; }
  .cs-end .hl-wrap { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .cs-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cs-facts li:nth-child(3) { padding-left: 0; border-left: 0; }
  .cs-facts li:nth-child(n+3) { padding-top: 16px; }
  .cs-modules { grid-template-columns: 1fr; }
  .cs-point { grid-template-columns: 1fr; }
  .cs-point svg { margin: 0; transform: rotate(90deg); }
  .cs-region { grid-template-columns: 1fr; }
  .cs-shots { overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; }
  .cs-shot { flex: 0 0 62%; scroll-snap-align: start; }
}