/* ============================================================
   海豹204 · 纪念站 —— 落日云海 · 毛玻璃纸墨风
   固定落日背景 / 半透明毛玻璃卡片 / 圆角 / 暖金-落日红点缀
   ============================================================ */

:root {
  --paper: #f7f4ee;
  --paper-alt: #f1ece2;
  --card: #fffdf8;
  --ink: #23211c;
  --ink-soft: #5f594c;
  --ink-faint: #a39b8c;
  --line: #e3dccd;
  --seal: #bd4a30;
  --seal-deep: #993722;
  --gold: #d99a4e;
  --sky: #6f9ec4;
  /* 毛玻璃系统 */
  --glass: rgba(255, 251, 243, 0.52);
  --glass-strong: rgba(255, 251, 243, 0.68);
  --glass-border: rgba(255, 255, 255, 0.62);
  --glass-shadow: 0 8px 32px rgba(140, 100, 60, 0.14);
  --blur: blur(14px) saturate(1.35);
  --serif: "Noto Serif SC", "Source Han Serif SC", "Source Han Serif CN", "Songti SC", SimSun, serif;
  --sans: "PingFang SC", "Microsoft YaHei", sans-serif;
  --measure: 42rem;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; background: var(--paper); }

body {
  background: transparent;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
}

/* ---------- 全局固定背景：落日云海 ----------
   两层 position:fixed 伪元素，内容从其上滚过，背景本身不动。
   ::before 铺图；::after 罩一层半透明暖纸色（含颗粒感），保证墨色文字可读。 */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: -2;
  background: url("../assets/bg-global.jpg") center / cover no-repeat;
}
body::after {
  content: "";
  position: fixed; inset: 0; z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(rgba(120, 105, 80, 0.045) 1px, transparent 1px),
    rgba(247, 244, 238, 0.72);
  background-size: 22px 22px, auto;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ---------- 导航（毛玻璃悬浮条） ---------- */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.85rem clamp(1.2rem, 5vw, 3.5rem);
  background: var(--glass-strong);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--glass-border);
  box-shadow: 0 4px 24px rgba(140, 100, 60, 0.10);
}
.brand { display: flex; align-items: center; gap: 0.65rem; }
.seal-mark {
  display: grid; place-items: center;
  width: 2rem; height: 2rem;
  background: var(--seal); color: #fff9ef;
  font-family: var(--sans); font-weight: 700; font-size: 0.72rem; letter-spacing: 0.02em;
  border-radius: var(--radius-sm);
  box-shadow: 0 3px 10px rgba(189, 74, 48, 0.35);
}
.brand-text { font-weight: 700; letter-spacing: 0.12em; }
.nav-links {
  position: relative;
  display: flex; gap: clamp(0.15rem, 0.8vw, 0.55rem); font-size: 0.95rem;
}
.nav-links a {
  position: relative; z-index: 1;
  color: var(--ink-soft); padding: 0.35rem 0.95rem;
  border-radius: var(--radius-pill); transition: color 0.25s;
}
.nav-links a:hover { color: var(--ink); }
.nav-links a.active { color: var(--seal); }
/* 橡皮拇指：在链接下层弹性滑行的胶囊 */
.nav-thumb {
  position: absolute; left: 0; top: 0; width: 0; height: 100%;
  z-index: 0; pointer-events: none;
  background: rgba(255, 255, 255, 0.52);
  border: 1px solid rgba(255, 255, 255, 0.78);
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 16px rgba(140, 100, 60, 0.16);
  will-change: transform, width;
}
.nav-soon { opacity: 0.75; }
.nav-soon::after { content: " · 施工中"; font-size: 0.7em; color: var(--ink-faint); }

/* ---------- 通用版式 ---------- */
main { min-height: 70vh; }
.section { max-width: 68rem; margin: 0 auto; padding: 3.5rem clamp(1.2rem, 5vw, 3.5rem); }
.section-title {
  font-size: 1.35rem; letter-spacing: 0.2em; font-weight: 700;
  margin-bottom: 2rem; display: flex; align-items: center; gap: 1rem;
}
.section-title::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.page-head { max-width: var(--measure); margin: 0 auto; padding: 4.5rem clamp(1.2rem, 5vw, 3.5rem) 1rem; }
.page-head h1 { font-size: clamp(1.8rem, 4.5vw, 2.6rem); letter-spacing: 0.15em; }
.page-head .lede { color: var(--ink-soft); margin-top: 0.8rem; }
.accent { color: var(--seal); }

/* ---------- 首页英雄区 ---------- */
.hero {
  position: relative; overflow: hidden;
  display: flex; align-items: center;
  max-width: 68rem; margin: 0 auto;
  padding: clamp(2.2rem, 6vh, 3.4rem) clamp(1.2rem, 5vw, 3.5rem) 0.6rem;
}
.hero-inner {
  max-width: 40rem;
  padding: clamp(1.5rem, 3.5vw, 2.2rem) clamp(1.8rem, 4.5vw, 3rem);
  background: var(--glass);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
}
.hero-kicker {
  font-family: var(--sans); font-size: 0.75rem; letter-spacing: 0.42em;
  color: var(--ink-faint); margin-bottom: 1rem;
}
.hero-title {
  font-size: clamp(3.2rem, 9vw, 5.6rem);
  letter-spacing: 0.08em; line-height: 1.15; font-weight: 900;
}
.hero-sub { margin-top: 0.9rem; color: var(--ink-soft); font-size: 1.1rem; }
.hero-actions { margin-top: 1.7rem; display: flex; gap: 1rem; flex-wrap: wrap; }

/* ---------- 故障字效（GlitchText 移植 · 纯 CSS，零 JS） ----------
 * 当前未启用（首页 h1 无 .glitch 类）。启用方式：给 .hero-title 加
 * class="glitch" 且补 data-text="海豹204"（注意与 tech-text.js 二选一，
 * TechText 会清空 h1 内容改用 canvas 绘制，伪元素将无处叠加）。
 */
.hero-title.glitch {
  position: relative;
  --before-duration: 1s;
  --after-duration: 1.5s;
  --before-shadow: -5px 0 red;
  --after-shadow: 5px 0 cyan;
}
.hero-title.glitch::before,
.hero-title.glitch::after {
  content: attr(data-text);
  position: absolute; left: 0; top: 0;
  width: 100%; height: 100%;
  color: transparent;
  overflow: hidden;
  white-space: nowrap;
  pointer-events: none;
}
.hero-title.glitch::before {
  text-shadow: var(--before-shadow);
  animation: gt-before var(--before-duration) steps(2, end) infinite alternate-reverse;
}
.hero-title.glitch::after {
  text-shadow: var(--after-shadow);
  animation: gt-after var(--after-duration) steps(2, end) infinite alternate-reverse;
}
@keyframes gt-before {
  0%   { clip-path: inset(12% 0 66% 0); transform: translate(-2px, 1px); }
  20%  { clip-path: inset(58% 0 18% 0); transform: translate(2px, -1px); }
  40%  { clip-path: inset(32% 0 52% 0); transform: translate(-1px, 0); }
  60%  { clip-path: inset(72% 0 6% 0);  transform: translate(1px, 1px); }
  80%  { clip-path: inset(6% 0 80% 0);  transform: translate(-2px, -1px); }
  100% { clip-path: inset(46% 0 34% 0); transform: translate(2px, 0); }
}
@keyframes gt-after {
  0%   { clip-path: inset(64% 0 14% 0); transform: translate(2px, -1px); }
  20%  { clip-path: inset(10% 0 74% 0); transform: translate(-2px, 1px); }
  40%  { clip-path: inset(48% 0 30% 0); transform: translate(1px, 0); }
  60%  { clip-path: inset(4% 0 84% 0);  transform: translate(-1px, -1px); }
  80%  { clip-path: inset(76% 0 8% 0);  transform: translate(2px, 1px); }
  100% { clip-path: inset(28% 0 56% 0); transform: translate(-2px, 0); }
}

/* 首页整体收紧（仅作用于首页，不影响其他页面） */
body[data-page="home"] .section { padding-top: 2.3rem; padding-bottom: 2.3rem; }
body[data-page="home"] .section-title { margin-bottom: 1.4rem; }
body[data-page="home"] .story-grid { gap: 1.2rem; }

/* ---------- TechText 技术字效标题（js/tech-text.js 驱动） ----------
 * h1 内容被替换为 canvas：悬停变虚线轮廓/可拖拽/噪点选框，空闲自动扫镜 */
.hero-title.tech-text { display: block; width: 100%; height: clamp(4.8rem, 11vw, 7rem); }
.tech-text-canvas { display: block; width: 100%; height: 100%; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 0.65rem 1.7rem;
  font-family: var(--sans); font-size: 0.92rem; letter-spacing: 0.12em;
  border-radius: var(--radius-pill); transition: all 0.25s;
}
.btn-seal {
  background: linear-gradient(135deg, var(--seal), var(--seal-deep));
  color: #fff9ef;
  box-shadow: 0 6px 18px rgba(189, 74, 48, 0.35);
}
.btn-seal:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(189, 74, 48, 0.42); }
.btn-ghost {
  border: 1px solid var(--glass-border); background: rgba(255, 251, 243, 0.4);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  color: var(--ink);
}
.btn-ghost:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* ---------- 故事卡片 ---------- */
.story-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr)); gap: 1.6rem; }
.story-card {
  background: var(--glass); border: 1px solid var(--glass-border); border-radius: var(--radius);
  backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  box-shadow: var(--glass-shadow);
  overflow: hidden; transition: transform 0.3s, box-shadow 0.3s;
  display: flex; flex-direction: column;
}
.story-card:hover { transform: translateY(-5px); box-shadow: 0 18px 40px rgba(140, 100, 60, 0.2); }
.story-card .cover { aspect-ratio: 16/10; object-fit: cover; width: 100%; background: var(--paper-alt); }
.story-card .body { padding: 1.1rem 1.3rem 1.4rem; display: flex; flex-direction: column; gap: 0.45rem; flex: 1; }
.story-card .date { font-family: var(--sans); font-size: 0.75rem; letter-spacing: 0.18em; color: var(--ink-faint); }
.story-card h3 { font-size: 1.12rem; letter-spacing: 0.05em; }
.story-card .summary { font-size: 0.9rem; color: var(--ink-soft); flex: 1; }
.story-card .tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.tag {
  font-family: var(--sans); font-size: 0.7rem; letter-spacing: 0.08em;
  color: var(--seal); border: 1px solid rgba(189, 74, 48, 0.35);
  background: rgba(255, 251, 243, 0.5);
  padding: 0.1rem 0.6rem; border-radius: var(--radius-pill);
}

/* ---------- 时间线 ---------- */
.timeline { max-width: 46rem; margin: 0 auto; padding: 2rem clamp(1.2rem, 5vw, 3.5rem) 4rem; position: relative; }
.timeline::before { content: ""; position: absolute; left: calc(1.2rem + 6px); top: 0; bottom: 0; width: 1px; background: var(--line); }
@media (min-width: 700px) { .timeline::before { left: 50%; } }
.tl-item { position: relative; padding: 0 0 1.4rem 2.4rem; }
.tl-dot {
  position: absolute; left: calc(1.2rem + 2px); top: 1.6rem;
  width: 9px; height: 9px; background: var(--seal); border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(255, 251, 243, 0.9), 0 0 12px rgba(217, 154, 78, 0.55);
}
/* 桌面端：左右两列各自独立排布，同侧图片紧凑衔接 */
@media (min-width: 700px) {
  .timeline { max-width: 60rem; display: flex; align-items: flex-start; }
  .tl-col {
    position: relative; flex: 1;
    display: flex; flex-direction: column; gap: 1.4rem;
    padding-bottom: 1.8rem;
  }
  .tl-col--l { padding-right: 2.5rem; text-align: right; }
  .tl-col--r { padding-left: 2.5rem; text-align: left; margin-top: 3rem; }
  .tl-col .tl-item { padding: 0; }
  /* 圆点分居轴线两侧，避免两列同高时叠在同一位置 */
  .tl-col--l .tl-dot { left: auto; right: calc(-2.5rem + 6px); }
  .tl-col--r .tl-dot { left: calc(-2.5rem + 6px); }
}
.tl-card {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  box-shadow: var(--glass-shadow);
  padding: 1.1rem 1.4rem 1.3rem;
  transition: transform 0.3s, box-shadow 0.3s;
}
.tl-card:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(140, 100, 60, 0.18); }
.tl-date { font-family: var(--sans); font-size: 0.78rem; letter-spacing: 0.2em; color: var(--seal); }
.tl-card h3 { margin: 0.3rem 0 0.5rem; font-size: 1.15rem; }
.tl-card p { font-size: 0.92rem; color: var(--ink-soft); }
.tl-card img { margin-top: 0.9rem; width: 100%; border-radius: var(--radius-sm); border: 1px solid var(--glass-border); }
@media (min-width: 700px) { .tl-card img { max-height: 13rem; object-fit: cover; } }

/* ---------- 相册 ---------- */
.album-block { max-width: 68rem; margin: 0 auto; padding: 0 clamp(1.2rem, 5vw, 3.5rem) 3rem; }
.album-title { font-size: 1.05rem; letter-spacing: 0.18em; color: var(--ink-soft); margin-bottom: 1.2rem; }
.album-title::before { content: "▸ "; color: var(--seal); }
.photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr)); gap: 0.9rem; }
.photo-grid figure { position: relative; overflow: hidden; border-radius: var(--radius-sm); border: 1px solid var(--glass-border); cursor: zoom-in; background: var(--paper-alt); box-shadow: 0 4px 16px rgba(140, 100, 60, 0.1); transition: transform 0.3s, box-shadow 0.3s; }
.photo-grid figure:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(140, 100, 60, 0.2); }
.photo-grid img { aspect-ratio: 4/3; object-fit: cover; width: 100%; transition: transform 0.4s; }
.photo-grid figure:hover img { transform: scale(1.05); }
.photo-grid figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 0.35rem 0.7rem; font-size: 0.75rem; color: #fff9ef;
  background: linear-gradient(transparent, rgba(35, 33, 28, 0.75));
  opacity: 0; transition: opacity 0.3s;
}
.photo-grid figure:hover figcaption { opacity: 1; }

/* 灯箱 */
.lightbox {
  position: fixed; inset: 0; z-index: 100; display: none;
  place-items: center; background: rgba(28, 25, 20, 0.92); padding: 2rem;
}
.lightbox.open { display: grid; }
.lightbox img { max-width: 92vw; max-height: 86vh; border-radius: var(--radius); }
.lightbox .lb-cap { color: #cfc8ba; font-size: 0.85rem; text-align: center; margin-top: 0.8rem; }

/* ---------- 文章 ---------- */
.article {
  max-width: var(--measure); margin: 2rem auto 0;
  padding: clamp(1.8rem, 4vw, 3rem) clamp(1.4rem, 5vw, 2.6rem) clamp(2.5rem, 5vw, 4rem);
  background: var(--glass-strong);
  backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border); border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
}
.article-meta { font-family: var(--sans); font-size: 0.8rem; letter-spacing: 0.15em; color: var(--ink-faint); margin-top: 0.6rem; }
.article h1 { font-size: clamp(1.7rem, 4.5vw, 2.3rem); line-height: 1.4; }
.article .cover-img { margin: 2rem 0; border-radius: var(--radius); border: 1px solid var(--glass-border); width: 100%; box-shadow: var(--glass-shadow); }
.article-body p { margin-bottom: 1.4rem; text-indent: 2em; }
.article-body figure { margin: 1.8rem 0; }
.article-body figure img { width: 100%; border-radius: var(--radius); border: 1px solid var(--glass-border); box-shadow: var(--glass-shadow); }
.article-body figcaption { font-size: 0.8rem; color: var(--ink-faint); text-align: center; margin-top: 0.5rem; text-indent: 0; }
.article-nav { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: 0.9rem; }
.article-nav a { color: var(--seal); }

/* ---------- 留言墙占位 ---------- */
.soon {
  max-width: 34rem; margin: 12vh auto; padding: 0 1.5rem; text-align: center;
}
.soon .big-seal {
  width: 6rem; height: 6rem; margin: 0 auto 2rem;
  border: 0.3rem solid var(--seal); border-radius: var(--radius-sm);
  display: grid; place-items: center; color: var(--seal);
  font-weight: 900; font-size: 1.15rem; line-height: 1.5;
  transform: rotate(-4deg);
  background: var(--glass); backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  box-shadow: var(--glass-shadow), inset 0 0 0 0.18rem rgba(255, 251, 243, 0.9);
}
.soon h1 { letter-spacing: 0.2em; margin-bottom: 1rem; }
.soon p { color: var(--ink-soft); font-size: 0.95rem; }

/* ---------- 页脚（毛玻璃） ---------- */
.site-footer {
  border-top: 1px solid var(--glass-border);
  background: var(--glass); backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  padding: 2.2rem 1.5rem 2.6rem; text-align: center;
  font-family: var(--sans); font-size: 0.78rem; letter-spacing: 0.2em; color: var(--ink-faint);
}

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(16px); animation: rise 0.8s cubic-bezier(0.2, 0.7, 0.3, 1) forwards; }
@keyframes rise { to { opacity: 1; transform: none; } }
.js-scroll-hide { opacity: 0; transform: translateY(16px); transition: opacity 0.7s, transform 0.7s; }
.js-scroll-hide.shown { opacity: 1; transform: none; }

/* ---------- 跨页过渡（内容换幕，固定背景不动） ---------- */
/* 进入初始态：由 <head> 内联脚本预置 pt-enter，首帧后 JS 摘除 → 触发过渡 */
.pt-on .site-nav, .pt-on main, .pt-on .site-footer {
  transition: opacity 0.5s cubic-bezier(0.2, 0.7, 0.3, 1), transform 0.5s cubic-bezier(0.2, 0.7, 0.3, 1);
}
.pt-on.pt-enter main { opacity: 0; transform: translateY(14px); }
.pt-on.pt-enter .site-nav { opacity: 0; }
.pt-on.pt-enter .site-footer { opacity: 0; }
/* 离开态：加到 body，内容淡出并轻微上移 */
body.pt-leaving main { opacity: 0; transform: translateY(-10px); transition-duration: 0.32s; }
body.pt-leaving .site-nav { opacity: 0.35; transition-duration: 0.32s; }
body.pt-leaving .site-footer { opacity: 0; transition-duration: 0.32s; }
@media (prefers-reduced-motion: reduce) {
  .pt-on .site-nav, .pt-on main, .pt-on .site-footer,
  body.pt-leaving main, body.pt-leaving .site-nav, body.pt-leaving .site-footer {
    transition: none;
  }
  .pt-on.pt-enter main { opacity: 1; transform: none; }
}

/* ---------- 小屏 ---------- */
@media (max-width: 640px) {
  .site-nav { flex-wrap: nowrap; }
  .brand { flex: none; }
  .nav-links { gap: 0.05rem; font-size: 0.82rem; flex-wrap: nowrap; }
  .nav-links a { padding: 0.3rem 0.45rem; white-space: nowrap; }
  .nav-soon::after { content: ""; }
  body { font-size: 16px; }
}
/* 窄手机：隐藏品牌文字只留 204 徽标、进一步收紧，保证 5 个链接单行不溢出 */
@media (max-width: 430px) {
  .site-nav { padding-left: 0.85rem; padding-right: 0.85rem; }
  .brand-text { display: none; }
  .nav-links { font-size: 0.8rem; }
  .nav-links a { padding: 0.28rem 0.36rem; }
}
/* 超窄（iPhone SE 320px 等）：再压一档 */
@media (max-width: 350px) {
  .nav-links a { padding: 0.26rem 0.28rem; }
  .seal-mark { width: 1.8rem; height: 1.8rem; }
}

/* ============================================================
   DriftWall 漂浮照片墙（纸墨风适配）
   ============================================================ */
.drift-section { padding: 2rem 0 3.5rem; }
.drift-shell {
  position: relative;
  height: min(74vh, 680px);
  border-top: 1px solid var(--glass-border);
  border-bottom: 1px solid var(--glass-border);
  background: rgba(255, 251, 243, 0.35);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  overflow: hidden;
}
.drift-hint {
  position: absolute; left: 50%; bottom: 0.9rem; transform: translateX(-50%);
  z-index: 5; font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.25em;
  color: var(--ink-faint); pointer-events: none; white-space: nowrap;
}

.drift-wall {
  position: absolute; inset: 0;
  perspective: var(--dw-perspective);
  cursor: crosshair;
  -webkit-mask-image: linear-gradient(to bottom, transparent 0, #000 var(--dw-edge), #000 calc(100% - var(--dw-edge)), transparent 100%);
  mask-image: linear-gradient(to bottom, transparent 0, #000 var(--dw-edge), #000 calc(100% - var(--dw-edge)), transparent 100%);
}
.drift-wall__plane {
  position: absolute; left: 50%; top: 50%;
  display: flex; gap: calc(var(--dw-gap) * 1.6);
  transform-style: preserve-3d;
  will-change: transform;
}
.drift-wall__col {
  display: flex; flex-direction: column; gap: var(--dw-gap);
  width: var(--dw-tile-w);
  transform-style: preserve-3d;
}
.drift-wall__track {
  display: flex; flex-direction: column; gap: var(--dw-gap);
  will-change: transform;
  transform-style: preserve-3d;
}
.drift-wall__tile {
  position: relative;
  width: var(--dw-tile-w); height: var(--dw-tile-h);
  border-radius: var(--dw-radius);
  overflow: hidden;
  transform-style: preserve-3d;
  outline: none;
}
.drift-wall__inner {
  position: absolute; inset: 0;
  display: block;
  transform: translateZ(0);
  transition: transform 0.45s cubic-bezier(0.2, 0.7, 0.3, 1), box-shadow 0.45s;
  box-shadow: 0 6px 18px rgba(60, 50, 35, 0.18);
  border: 4px solid #fffdf8;
  border-radius: var(--dw-radius);
  background: #fffdf8;
}
.drift-wall__inner img {
  width: 100%; height: 100%; object-fit: cover;
  filter: saturate(0.85) sepia(0.06);
  transition: filter 0.45s;
}
.drift-wall__overlay {
  position: absolute; inset: 0;
  background: var(--dw-overlay);
  opacity: calc(var(--dw-dim) * 0.35);
  transition: opacity 0.45s;
  pointer-events: none;
}
.drift-wall__tile.is-active .drift-wall__inner {
  transform: translateZ(var(--dw-lift)) scale(1.06);
  box-shadow: 0 26px 48px rgba(60, 50, 35, 0.35);
}
.drift-wall__tile.is-active .drift-wall__inner img { filter: saturate(1.05) sepia(0); }
.drift-wall__tile.is-active .drift-wall__overlay { opacity: 0; }
.drift-wall__tile:focus-visible .drift-wall__inner {
  outline: 2px solid var(--seal); outline-offset: 3px;
}
.drift-wall--reduced .drift-wall__plane { transform: translate(-50%, -50%) scale(0.9) !important; }

/* 由来区块（毛玻璃引言卡） */
.origin-wrap {
  max-width: 44rem; padding: 1.2rem 1.6rem;
  background: var(--glass);
  backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--glass-border); border-left: 3px solid var(--seal);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow);
  color: var(--ink-soft); font-size: 0.98rem;
}
.origin-wrap p + p { margin-top: 0.6rem; }

/* ---------- 毛玻璃降级兜底（不支持 backdrop-filter 时提高底色不透明度） ---------- */
@supports not ((backdrop-filter: blur(2px)) or (-webkit-backdrop-filter: blur(2px))) {
  .site-nav, .hero-inner, .story-card, .tl-card,
  .article, .origin-wrap, .site-footer, .drift-shell, .music-body,
  .soon .big-seal, .btn-ghost, .tag {
    background: rgba(255, 251, 243, 0.9);
  }
}

/* ============================================================
   背景音乐悬浮球（右下黑胶小球 · 悬停/点击弹出音量胶囊）
   ============================================================ */
.music-player {
  position: fixed; right: 1.1rem; bottom: 1.1rem; z-index: 70;
  --pill-gap: 0.6rem;
  display: flex; align-items: center; gap: 0;
  font-family: var(--sans);
  opacity: 0; transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.music-player.is-ready { opacity: 1; transform: none; }

/* 黑胶唱片小球 */
.music-btn {
  order: 1; position: relative; flex: none;
  width: 2.7rem; height: 2.7rem; padding: 0;
  display: grid; place-items: center;
  border: none; border-radius: 50%; cursor: grab;
  touch-action: none; /* 触屏拖拽时不触发页面滚动 */
  background: none;
  filter: drop-shadow(0 4px 10px rgba(60, 45, 30, 0.35));
  transition: transform 0.25s cubic-bezier(0.2, 0.7, 0.3, 1), opacity 0.3s;
}
.music-btn:hover { transform: scale(1.08); }
.music-btn:active { transform: scale(0.94); cursor: grabbing; }
.disc {
  width: 100%; height: 100%; border-radius: 50%;
  display: grid; place-items: center;
  background:
    repeating-radial-gradient(circle at 50% 50%,
      rgba(255, 255, 255, 0.055) 0 1px, transparent 1px 3.5px),
    radial-gradient(circle at 34% 30%, #4a453c 0%, #2b2823 46%, #1d1b17 100%);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.14),
              inset 0 -3px 8px rgba(0, 0, 0, 0.45);
  transition: transform 0.4s;
}
.disc-label {
  width: 42%; height: 42%; border-radius: 50%;
  display: grid; place-items: center;
  background: radial-gradient(circle at 35% 30%, var(--seal), var(--seal-deep));
  box-shadow: 0 0 0 2px rgba(20, 18, 15, 0.8), inset 0 1px 2px rgba(255, 255, 255, 0.25);
  color: #fff9ef;
}
.disc-label svg { width: 50%; height: 50%; fill: currentColor; }
.disc-label .gl-pause { display: none; }
.music-player.is-playing .disc-label .gl-play { display: none; }
.music-player.is-playing .disc-label .gl-pause { display: inline; }
.music-player.is-playing .disc {
  animation: disc-spin 7s linear infinite;
}
@keyframes disc-spin { to { transform: rotate(360deg); } }
/* 唱片转、中心图标保持正立 */
.music-player.is-playing .disc-label { animation: disc-spin-rev 7s linear infinite; }
@keyframes disc-spin-rev { to { transform: rotate(-360deg); } }

/* 曲名 + 音量滑块（默认收缩，悬停或点击小球后向左弹出玻璃胶囊） */
.music-body {
  order: 0;
  display: flex; flex-direction: column; justify-content: center; gap: 0.3rem;
  flex: none; width: 0; opacity: 0; overflow: hidden;
  padding: 0.5rem 0; margin-right: 0; border-radius: var(--radius-pill);
  background: var(--glass-strong);
  backdrop-filter: var(--blur); -webkit-backdrop-filter: var(--blur);
  box-shadow: var(--glass-shadow), inset 0 0 0 1px var(--glass-border);
  transition: width 0.38s cubic-bezier(0.2, 0.7, 0.3, 1), opacity 0.28s ease,
              padding 0.38s cubic-bezier(0.2, 0.7, 0.3, 1), margin 0.38s ease;
}
.music-player:hover .music-body,
.music-player.is-open .music-body {
  width: 10.4rem; opacity: 1; padding: 0.55rem 0.85rem; margin-right: var(--pill-gap);
}
.music-meta { display: flex; align-items: baseline; gap: 0.4rem; white-space: nowrap; }
.music-title { font-size: 0.7rem; letter-spacing: 0.14em; color: var(--ink-faint); }
.music-sub {
  font-size: 0.75rem; color: var(--ink-soft);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  max-width: 8.6rem;
}
.music-slider {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 4px; border-radius: 999px; cursor: pointer;
  background: linear-gradient(to right,
    var(--seal) 0 calc(var(--mp-fill, 0.6) * 100%),
    rgba(35, 33, 28, 0.14) calc(var(--mp-fill, 0.6) * 100%) 100%);
  outline: none;
}
.music-slider::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 12px; height: 12px; border-radius: 50%;
  background: #fffdf8; border: 1.5px solid var(--seal);
  box-shadow: 0 1px 4px rgba(140, 100, 60, 0.3);
  transition: transform 0.15s;
}
.music-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.music-slider::-moz-range-thumb {
  width: 12px; height: 12px; border-radius: 50%;
  background: #fffdf8; border: 1.5px solid var(--seal);
  box-shadow: 0 1px 4px rgba(140, 100, 60, 0.3);
}
.music-slider::-moz-range-track { height: 4px; border-radius: 999px; background: rgba(35, 33, 28, 0.14); }
.music-slider::-moz-range-progress { height: 4px; border-radius: 999px; background: var(--seal); }

/* 小屏：点按小球展开（触屏无悬停） */
@media (max-width: 640px) {
  .music-player { right: 0.8rem; bottom: 0.8rem; --pill-gap: 0.5rem; }
  .music-player:hover .music-body { width: 0; opacity: 0; padding: 0.5rem 0; margin-right: 0; }
  .music-player.is-open .music-body { width: 9.2rem; opacity: 1; padding: 0.55rem 0.75rem; margin-right: var(--pill-gap); }
}

/* 拖拽定位：靠近左缘时改 row-reverse + left/top 锚定，胶囊向右展（JS 切换 .at-left） */
.music-player.at-left { flex-direction: row-reverse; }
.music-player.at-left:hover .music-body,
.music-player.at-left.is-open .music-body { margin-right: 0; margin-left: var(--pill-gap); }
.music-player.is-dragging { cursor: grabbing; transition: none; }
.music-player.is-dragging .music-btn,
.music-player.is-dragging .music-btn:active,
.music-player.is-dragging .music-btn:hover { transform: none; cursor: grabbing; }
/* 拖拽中不响应悬停展开 */
.music-player.is-dragging:hover .music-body { width: 0; opacity: 0; padding: 0.5rem 0; margin: 0; }

/* 减弱动画偏好：全站动画/过渡停用，内容保持可见 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { animation: none; opacity: 1; transform: none; }
  .js-scroll-hide { transition: none; opacity: 1; transform: none; }
  .music-player.is-playing .disc,
  .music-player.is-playing .disc-label { animation: none; }
  .music-player, .music-body, .music-btn { transition: none; }
  .story-card, .tl-card, .photo-grid figure,
  .photo-grid img, .btn, .drift-wall__inner { transition: none; }
  .hero-title.glitch::before, .hero-title.glitch::after { animation: none; clip-path: inset(0 0 100% 0); }
}