/* ============================================================
   草屋 · 组件
   页眉、书册分区、观隅陈列、衡几工具、页脚。
   ============================================================ */

/* ---------------- 页眉 ---------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(247, 244, 236, 0.86);
  backdrop-filter: saturate(1.1) blur(9px);
  -webkit-backdrop-filter: saturate(1.1) blur(9px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line-soft);
}

.header-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 2rem;
  padding-block: 1.5rem;
}

.brand { display: flex; align-items: baseline; gap: 0.75rem; }
.brand-name {
  font-size: 1.32rem;
  letter-spacing: var(--tracking-xwide);
  color: var(--ink);
  border: 0;
}
.brand-name:hover { border: 0; color: var(--ink); }

.brand-slogan {
  font-family: var(--font-fang);
  font-size: 0.78rem;
  letter-spacing: var(--tracking-wide);
  color: var(--ink-wash);
}

.nav {
  display: flex;
  gap: clamp(1.2rem, 3vw, 2.6rem);
  font-size: 0.9rem;
}
.nav a {
  color: var(--ink-faint);
  letter-spacing: var(--tracking-wide);
  position: relative;
  padding-bottom: 2px;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -1px;
  width: 0; height: 1px;
  background: var(--qing);
  opacity: 0.6;
  transition: width var(--dur) var(--ease);
}
.nav a:hover::after,
.nav a.is-active::after { width: 100%; }
.nav a:hover, .nav a.is-active { color: var(--qing); }

/* 移动端：导航折行到下方 */
@media (max-width: 44rem) {
  .header-inner { flex-direction: column; align-items: flex-start; gap: 0.9rem; }
  .brand-slogan { display: none; }
}

/* ---------------- 卷首 ---------------- */

.hero {
  padding-block: clamp(4rem, 16vh, 9rem);
  min-height: 62vh;
  display: flex;
  align-items: center;
}
.hero-title {
  font-size: clamp(1.9rem, 5vw, 3rem);
  letter-spacing: var(--tracking-xwide);
  line-height: 1.45;
  margin-bottom: 1.6rem;
}
.hero-sub {
  font-family: var(--font-fang);
  font-size: clamp(0.98rem, 1.4vw, 1.12rem);
  color: var(--ink-faint);
  line-height: var(--leading-loose);
  max-width: 30rem;
}

/* ---------------- 观隅：藏品陈列 ---------------- */

.relic {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper-warm);
  transition: border-color var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease);
}
.relic:hover {
  border-color: var(--line);
  box-shadow: var(--shadow-soft);
}

.relic-media {
  aspect-ratio: 4 / 3;
  background:
    linear-gradient(150deg, var(--paper-deep), var(--paper-warm) 55%, rgba(110,139,138,0.06));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.relic-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--dur-slow) var(--ease-slow);
}
.relic:hover .relic-media img { transform: scale(1.025); }

/* 占位符：未放入图片时的空白处 */
.relic-placeholder {
  font-family: var(--font-fang);
  font-size: 0.8rem;
  letter-spacing: var(--tracking-wide);
  color: var(--ink-wash);
}

.relic-body { padding: 1.1rem 1.3rem 1.4rem; }
.relic-title {
  font-size: 1rem;
  letter-spacing: var(--tracking-wide);
  margin-bottom: 0.4rem;
}
.relic-note {
  font-family: var(--font-fang);
  font-size: 0.85rem;
  color: var(--ink-faint);
  line-height: 1.75;
  margin: 0;
}

/* 单幅横长陈列，用于主打藏品 */
.relic-wide { grid-column: 1 / -1; }
.relic-wide .relic-media { aspect-ratio: 21 / 9; }

/* ---------------- 观隅：听音 ---------------- */

.player {
  display: flex;
  align-items: center;
  gap: 1.3rem;
  padding: 1.15rem 1.5rem;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: var(--paper-warm);
  max-width: 36rem;
  transition: border-color var(--dur) var(--ease);
}
.player:hover { border-color: var(--line); }

.player-toggle {
  flex: 0 0 auto;
  width: 2.5rem; height: 2.5rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--qing);
  cursor: pointer;
  display: grid;
  place-items: center;
  font-size: 0.8rem;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.player-toggle:hover {
  border-color: var(--line-qing);
  background: rgba(110, 139, 138, 0.06);
}

.player-meta { flex: 1 1 auto; min-width: 0; }
.player-title {
  font-size: 0.95rem;
  letter-spacing: var(--tracking-wide);
  margin: 0 0 0.15rem;
}
.player-sub {
  font-family: var(--font-fang);
  font-size: 0.78rem;
  color: var(--ink-wash);
  margin: 0;
}

.player-track {
  flex: 0 0 7rem;
  height: 2px;
  background: var(--line-soft);
  border-radius: 99px;
  overflow: hidden;
}
.player-progress {
  width: 0%;
  height: 100%;
  background: var(--qing-soft);
  border-radius: 99px;
  transition: width 240ms linear;
}

@media (max-width: 34rem) {
  .player { flex-wrap: wrap; border-radius: var(--radius-lg); }
  .player-track { flex-basis: 100%; }
}

/* ---------------- 衡几：思想产出功能区 ---------------- */

.tool {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.tool-head { display: flex; align-items: baseline; gap: 0.7rem; }
.tool-name {
  font-size: 1.05rem;
  letter-spacing: var(--tracking-wide);
  margin: 0;
}
.tool-desc {
  font-family: var(--font-fang);
  font-size: 0.85rem;
  color: var(--ink-faint);
  line-height: 1.8;
  margin: 0;
  flex: 1 1 auto;
}
.tool-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line-soft);
}

/* 文本域：纸面质感，低对比边界 */
textarea.field {
  width: 100%;
  min-height: 8.5rem;
  resize: vertical;
  font-family: var(--font-song);
  font-size: 0.95rem;
  line-height: var(--leading-normal);
  letter-spacing: var(--tracking);
  color: var(--ink);
  background: var(--paper-warm);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
textarea.field::placeholder { color: var(--ink-wash); font-family: var(--font-fang); }
textarea.field:focus {
  outline: none;
  border-color: var(--line-qing);
  box-shadow: 0 0 0 3px rgba(110, 139, 138, 0.07);
}

/* 输出区：留白承接，未调用时保持安静 */
.output {
  font-family: var(--font-fang);
  font-size: 0.92rem;
  line-height: var(--leading-loose);
  color: var(--ink-soft);
  white-space: pre-wrap;
  word-break: break-word;
}
.output:empty { display: none; }

/* ---------------- 页脚 ---------------- */

.site-footer {
  margin-top: var(--section-gap);
  padding-block: clamp(2.6rem, 7vh, 4rem);
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-fang);
  font-size: 0.82rem;
  color: var(--ink-wash);
  letter-spacing: var(--tracking-wide);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2rem;
  justify-content: space-between;
}
.footer-inner a { color: var(--ink-faint); }