/* ==========================================================================
   css/timeline.css —— 时间轴 · 晋城非遗大事记 + 传承人墙
   说明：两块都是“横向铺开的信息带”，放在同一个文件里；
        时间轴用横向长卷，滚动到哪儿点亮到哪儿。
   ========================================================================== */

/* ======================================================================
   一、时间轴
   ====================================================================== */
.tl-scroll {
  border-radius: var(--radius-sm);
  background:
    radial-gradient(ellipse at 50% 45%, rgba(255, 253, 246, .82), rgba(240, 231, 214, .45)),
    url('../assets/svg/paper-noise.svg') 0 0 / 240px 240px;
  border: var(--line);
}

.tl-track {
  position: relative;
  /* width / height 由 js/timeline.js 按节点数写入 */
}

.tl-rail {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

.tl-rail-bg {
  fill: none;
  stroke: rgba(31, 28, 26, .18);
  stroke-width: 3;
  stroke-linecap: round;
}

.tl-rail-ink {
  fill: none;
  stroke: var(--red);
  stroke-width: 4;
  stroke-linecap: round;
  filter: drop-shadow(0 0 6px rgba(178, 58, 43, .3));
  transition: stroke-dashoffset .8s var(--ease-out);
}

.tl-nodes { position: absolute; inset: 0; }

/* 节点本身是零尺寸锚点，点与卡都相对它定位 */
.tl-node {
  position: absolute;
  width: 0;
  height: 0;
}

.tl-dot {
  position: absolute;
  left: -9px;
  top: -9px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid rgba(31, 28, 26, .45);
  background: var(--paper-warm);
  box-shadow: 0 0 0 6px rgba(31, 28, 26, .05);
  transition: transform .5s var(--spring), border-color .5s var(--ease),
              background .5s var(--ease), box-shadow .5s var(--ease);
}

.tl-node.on .tl-dot {
  border-color: var(--red);
  background: var(--red);
  box-shadow: 0 0 0 7px rgba(178, 58, 43, .16);
  transform: scale(1.15);
}

/* 卡片 */
.tl-card {
  position: absolute;
  left: -110px;
  width: 220px;
  padding: 14px 16px;
  border: var(--line);
  border-radius: var(--radius-sm);
  background:
    url('../assets/svg/paper-noise.svg') 0 0 / 240px 240px,
    linear-gradient(180deg, rgba(255, 253, 246, .96), rgba(245, 238, 224, .96));
  box-shadow: var(--shadow-sm), var(--inner);
  opacity: 0;
  transform: translateY(14px) scale(.96);
  transition: opacity .6s var(--ease), transform .6s var(--spring);
}

.tl-node.up .tl-card { bottom: 30px; }
.tl-node.down .tl-card { top: 30px; }

/* 指向轴线的细颈 */
.tl-card::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 1px;
  height: 30px;
  margin-left: -.5px;
  background: linear-gradient(180deg, rgba(178, 58, 43, .5), transparent);
}

.tl-node.up .tl-card::after { top: 100%; background: linear-gradient(180deg, transparent, rgba(178, 58, 43, .5)); }
.tl-node.down .tl-card::after { bottom: 100%; background: linear-gradient(180deg, rgba(178, 58, 43, .5), transparent); }

.tl-node.on .tl-card { opacity: 1; transform: none; }

.tl-era {
  display: inline-block;
  padding: .16em .75em;
  border-radius: 999px;
  font-family: var(--font-kai);
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--red);
  background: rgba(178, 58, 43, .1);
  border: 1px solid rgba(178, 58, 43, .35);
}

.tl-title {
  margin-top: 8px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--ink);
}

.tl-text {
  margin-top: 6px;
  font-size: .84rem;
  line-height: 1.85;
  letter-spacing: .02em;
  color: var(--ink-soft);
}

/* ======================================================================
   二、传承人墙
   ====================================================================== */
.ih-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap);
}

.ih-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 26px 20px 22px;
  text-align: center;
  border: var(--line);
  border-radius: var(--radius);
  background:
    url('../assets/svg/paper-noise.svg') 0 0 / 240px 240px,
    linear-gradient(180deg, rgba(255, 253, 246, .95), rgba(244, 237, 223, .96));
  box-shadow: var(--shadow-sm), var(--inner);
  transition: transform .38s var(--ease), box-shadow .38s var(--ease);
}

.ih-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: url('../assets/svg/rough-edge.svg') center / 100% 100% no-repeat;
  opacity: .28;
}

.ih-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow), var(--inner);
}

/* 肖像：圆形手绘底 */
.ih-portrait {
  position: relative;
  z-index: 1;
  width: 116px;
  height: 116px;
  padding: 8px;
  border-radius: 50%;
  border: 2px solid rgba(201, 162, 39, .6);
  background: radial-gradient(circle at 50% 38%, rgba(255, 253, 246, .95), rgba(232, 221, 199, .9));
  box-shadow: inset 0 4px 14px rgba(31, 28, 26, .1);
  color: var(--ink);
  overflow: hidden;
}

.ih-portrait .icon-svg { width: 100%; height: 100%; }

/* 真人照片头像：照片占满圆框，压一圈内影避免太平 */
.ih-portrait-photo { padding: 0; background: #e8ddc7; }

.ih-portrait-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  filter: saturate(.96) contrast(1.02);
}

.ih-portrait-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  box-shadow: inset 0 0 0 1px rgba(255, 253, 246, .45), inset 0 -12px 26px rgba(31, 28, 26, .2);
  pointer-events: none;
}

.ih-name {
  position: relative;
  z-index: 1;
  margin-top: 14px;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: .14em;
}

.ih-project {
  position: relative;
  z-index: 1;
  margin-top: 4px;
  font-family: var(--font-kai);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--gold);
}

.ih-words {
  position: relative;
  z-index: 1;
  margin-top: 12px;
  padding: 12px 14px;
  border-top: 1px dashed rgba(178, 58, 43, .4);
  border-bottom: 1px dashed rgba(178, 58, 43, .4);
  font-family: var(--font-kai);
  font-size: .88rem;
  line-height: 1.9;
  color: var(--red-deep);
}

.ih-btn {
  position: relative;
  z-index: 2;
  margin-top: auto;
  padding: .42em 1.15em;
  margin-top: 16px;
  border: 1px solid rgba(178, 58, 43, .5);
  border-radius: 999px;
  font-family: var(--font-kai);
  font-size: .78rem;
  letter-spacing: .12em;
  color: var(--red);
  background: rgba(255, 253, 246, .8);
  transition: background .22s var(--ease), color .22s var(--ease), transform .22s var(--ease);
}

.ih-btn:hover { background: var(--red); color: #fdf8ee; transform: translateY(-2px); }