/* ==========================================================================
   novel-portal — 戴森球风格主题（Dyson）
   ---------------------------------------------------------------------------
   设计语言取自参考图：
     · 纯黑底 + 点云粒子（星图 / 螺旋点云 / 点云球体）
     · 青蓝 #53f4f8 主色（点云球体高光色）
     · 紫 #7a6cff → 橙 #ff9a4d（超新星残骸的蓝紫→橙红渐变）
     · 灰阶细线 + 等宽字编号（星图的扫描线与目录标签）
   主题： dyson（星域，默认）/ paper（纸白）/ sepia（护眼）
   字号： html[data-size] = sm / md / lg
   ========================================================================== */

:root,
html[data-theme="dyson"],
html[data-theme="dark"] {
  --void: #05070d;
  --panel: rgba(13, 20, 34, .72);
  --card: rgba(16, 25, 42, .66);
  --line: rgba(105, 165, 210, .16);
  --line-strong: rgba(105, 195, 235, .34);

  --ink: #dbe7f4;
  --ink-soft: #9fb2c8;
  --muted: #6b8299;

  --cy: #53f4f8;
  --cy-dim: #2a9db4;
  --vi: #7a6cff;
  --am: #ff9a4d;
  --gr: #46e3b0;

  --bg: var(--void);
  --bg-soft: rgba(10, 16, 28, .6);
  --accent: var(--cy);
  --accent-soft: rgba(83, 244, 248, .09);
  --free: var(--gr);
  --free-soft: rgba(70, 227, 176, .1);
  --vip: var(--am);
  --vip-soft: rgba(255, 154, 77, .1);
  --ext: var(--vi);
  --ext-soft: rgba(122, 108, 255, .12);

  --radius: 4px;
  --glow: 0 0 0 1px rgba(83, 244, 248, .18), 0 0 32px -12px rgba(83, 244, 248, .35);
  --shadow: 0 18px 48px -28px rgba(0, 0, 0, .95);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --serif: "Songti SC", "Noto Serif SC", "Source Han Serif SC", "STSong", Georgia, serif;
}

/* 阅读模式：长时间读正文时纯黑底对部分人不友好，保留两套亮色 */
html[data-theme="paper"] {
  --void: #fbf9f5; --bg: #fbf9f5; --bg-soft: #f3efe7;
  --panel: #ffffff; --card: #ffffff;
  --line: #e4ded2; --line-strong: #cfc6b4;
  --ink: #22201c; --ink-soft: #5f5a52; --muted: #8d8779;
  --cy: #0c7186; --cy-dim: #0c7186; --vi: #5a4fd0; --am: #b0741a; --gr: #1f7a5c;
  --accent: #0c7186; --accent-soft: #eef6f7;
  --free: #1f7a5c; --free-soft: #e6f4ee;
  --vip: #b0741a; --vip-soft: #fdf1dc;
  --ext: #45528c; --ext-soft: #eaecf8;
  --glow: 0 1px 2px rgba(34, 32, 28, .06);
  --shadow: 0 12px 30px -22px rgba(34, 32, 28, .5);
}

html[data-theme="sepia"] {
  --void: #f2ead9; --bg: #f2ead9; --bg-soft: #eae0cb;
  --panel: #fbf6ea; --card: #fbf6ea;
  --line: #dfd2b8; --line-strong: #c9b997;
  --ink: #43392a; --ink-soft: #6b5c46; --muted: #94826a;
  --cy: #8a5a2b; --cy-dim: #8a5a2b; --vi: #6a5aa0; --am: #8a5a2b; --gr: #3f6b45;
  --accent: #8a5a2b; --accent-soft: #f0e2c9;
  --free: #3f6b45; --free-soft: #e6ecdd;
  --vip: #8a5a2b; --vip-soft: #f0e2c9;
  --ext: #5a5480; --ext-soft: #e8e3ec;
  --glow: 0 1px 2px rgba(67, 57, 42, .06);
  --shadow: 0 12px 30px -22px rgba(67, 57, 42, .5);
}

html[data-size="sm"] { --reading-size: 15.5px; }
html[data-size="md"] { --reading-size: 17.5px; }
html[data-size="lg"] { --reading-size: 20px; }

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--void);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 15.5px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color .16s ease; }
a:hover { color: var(--accent); }

.wrap { width: min(1120px, calc(100% - 44px)); margin: 0 auto; position: relative; }
.muted { color: var(--muted); font-size: 13px; }

code {
  font-family: var(--mono);
  font-size: .88em;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 6px;
  color: var(--cy);
}

/* ------------------------------------------------------------------ 背景层 */
.bg-canvas {
  position: fixed; inset: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}
.bg-veil {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(1100px 620px at 78% -8%, rgba(83, 244, 248, .11), transparent 62%),
    radial-gradient(900px 560px at 8% 4%, rgba(122, 108, 255, .10), transparent 60%),
    radial-gradient(760px 520px at 50% 108%, rgba(255, 154, 77, .07), transparent 62%);
}
/* 公式点云的染色层：白点画在画布上，这层用 mix-blend-mode:color 只给亮点上色
   —— 黑底保持黑，亮点被染成 蓝→紫→品红→红→橙，零额外绘制成本 */
.bg-tint {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background: linear-gradient(176deg,
    #5f7dff 0%, #7b6cff 18%, #a054c0 38%, #c9488a 56%, #e8453f 76%, #ff8a3d 100%);
  mix-blend-mode: color;
}
html[data-theme="paper"] .bg-canvas, html[data-theme="sepia"] .bg-canvas,
html[data-theme="paper"] .hero-bg, html[data-theme="sepia"] .hero-bg,
html[data-theme="paper"] .bg-veil, html[data-theme="sepia"] .bg-veil,
html[data-theme="paper"] .bg-tint, html[data-theme="sepia"] .bg-tint { display: none; }

.topbar, main, .footer { position: relative; z-index: 2; }

/* ------------------------------------------------------------------ 顶栏 */
.topbar {
  position: sticky; top: 0; z-index: 30;
  background: color-mix(in srgb, var(--void) 82%, transparent);
  backdrop-filter: blur(14px) saturate(130%);
}
/* 顶栏底边：安静的渐变亮线，脉冲由 static/topbar-pulse.js 画在上面。
   原来那条「整边缓慢扭动」的 SVG 滤镜版已经撤掉 —— 现在改成随机位置冒心电脉冲，
   更符合「心电图」的语感（滤镜版还留在 experiments/card-frames.html 里当卡片候选 01）。 */
.topbar::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 2px;
  background: linear-gradient(90deg,
    transparent 0%, var(--line-strong) 10%, var(--cy) 50%, var(--line-strong) 90%, transparent 100%);
  opacity: .72;
  pointer-events: none;
}
/* 脉冲画布：横向铺满，纵向以底边为中心上下各 20px —— 正好给主峰留出垂下去的空间 */
.topbar-pulse {
  position: absolute; left: 0; right: 0; bottom: -20px; height: 40px; width: 100%;
  display: block; pointer-events: none;
}
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 66px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 26px; height: 26px; flex: 0 0 auto; position: relative;
  border: 1px solid var(--line-strong); border-radius: 50%;
  box-shadow: inset 0 0 12px -4px var(--cy);
}
.brand-mark::before { content: ""; position: absolute; inset: 5px; border: 1px solid var(--cy); border-radius: 50%; opacity: .55; }
.brand-mark::after {
  content: ""; position: absolute; inset: -3px; border-radius: 50%;
  border: 1px solid transparent; border-top-color: var(--cy); border-bottom-color: var(--vi);
  animation: spin 9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-name { font-size: 15.5px; letter-spacing: .16em; }
.brand-sub { font-family: var(--mono); font-size: 10px; letter-spacing: .22em; color: var(--muted); text-transform: uppercase; }

.nav { display: flex; gap: 4px; align-items: center; }
.nav a {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .1em;
  color: var(--ink-soft); padding: 7px 13px;
  border: 1px solid transparent; border-radius: 3px;
}
.nav a i { color: var(--cy-dim); font-style: normal; margin-right: 6px; }
.nav a:hover { color: var(--ink); border-color: var(--line); background: var(--accent-soft); }
.nav a.on { color: var(--cy); border-color: var(--line-strong); background: var(--accent-soft); }

.sysline { font-family: var(--mono); font-size: 10px; letter-spacing: .18em; color: var(--muted); display: flex; gap: 14px; align-items: center; }
.sysline .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cy); box-shadow: 0 0 8px var(--cy); animation: pulse 2.6s ease-in-out infinite; }
@keyframes pulse { 0%, 100% { opacity: 1 } 50% { opacity: .3 } }

/* ------------------------------------------------------------------ 首屏 */
.hero {
  position: relative;
  min-height: calc(100vh - 66px);
  display: grid;
  align-items: center;
  padding: 60px 0;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
  /* 从内容栏里出血到视口全宽：球体要铺满整个屏，不能被 main.wrap 的 1180px 框住 */
  width: 100vw;
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
}
/* 首屏里有三层，从下往上：公式背景 (0) → 戴森球 (1) → 文字 (2)。
   两个画布都是绝对定位、同一个 .hero 的子元素，所以滚动时**一起走** ——
   原来背景是 position:fixed，球体在文档流里，滚起来就是一个粘着一个飘。 */
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; z-index: 0; pointer-events: none; }
.hero > .bg-tint { position: absolute; }     /* 染色层（只点云那套用）也跟着进首屏 */
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; z-index: 1; }
.hero-inner { position: relative; z-index: 2; }
/* 文字一侧压暗，保证压在全屏点云上也读得清 */
.hero-inner::before {
  content: ""; position: absolute; z-index: -1;
  top: -60px; bottom: -60px; left: -80px; right: -20%;
  background: linear-gradient(100deg, color-mix(in srgb, var(--void) 94%, transparent) 0%,
              color-mix(in srgb, var(--void) 74%, transparent) 42%,
              transparent 78%);
  pointer-events: none;
}
html[data-theme="paper"] .hero-inner::before,
html[data-theme="sepia"] .hero-inner::before { background: none; }

.hero-inner {
  position: relative; z-index: 2;
  width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 32px;
}
/* 文字块收窄到左半边，右半边留给铺满全屏的球体 */
.hero-inner > * { max-width: 620px; }

.kicker, .eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: .3em;
  color: var(--cy); text-transform: uppercase; margin: 0 0 16px;
  display: flex; align-items: center; gap: 10px;
}
.kicker::before, .eyebrow::before { content: ""; width: 26px; height: 1px; background: linear-gradient(90deg, var(--cy), transparent); }

.hero h1 {
  margin: 0;
  font-size: clamp(32px, 5.4vw, 54px);
  letter-spacing: .12em; line-height: 1.16;
  background: linear-gradient(102deg, #ffffff 8%, var(--cy) 46%, var(--vi) 92%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
html[data-theme="paper"] .hero h1,
html[data-theme="sepia"] .hero h1 { background: none; color: var(--ink); -webkit-text-fill-color: currentColor; }

.tagline { margin: 18px 0 0; color: var(--ink-soft); font-size: 16.5px; max-width: 46ch; }

.stats { list-style: none; display: flex; flex-wrap: wrap; gap: 12px; padding: 0; margin: 30px 0 0; }
.stats li {
  border: 1px solid var(--line); background: var(--panel); border-radius: 4px;
  padding: 10px 16px; display: flex; flex-direction: column; gap: 1px; min-width: 96px;
}
.stats b { font-family: var(--mono); font-size: 20px; color: var(--cy); letter-spacing: .04em; }
.stats span { font-family: var(--mono); font-size: 10px; letter-spacing: .16em; color: var(--muted); }

/* ------------------------------------------------------------------ 区块 */
.block { padding: 58px 0; border-bottom: 1px solid var(--line); }
.block:last-child { border-bottom: 0; }
.block-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 26px; flex-wrap: wrap; }
.block h2 { margin: 0; font-size: 19px; letter-spacing: .14em; display: flex; align-items: baseline; gap: 12px; }
.block h2::before { content: "//"; font-family: var(--mono); color: var(--cy); font-size: 14px; letter-spacing: 0; }
.more { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; color: var(--muted); }
.more:hover { color: var(--cy); }

/* ------------------------------------------------------------------ 卡片（HUD 角标） */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 18px; }

.card {
  position: relative;
  background: linear-gradient(158deg, var(--card), rgba(6, 10, 18, .88));
  /* 边框的活交给 .card-frame / .card-glow 两个子元素画（见「卡片框：明暗呼吸」），
     这里只留 1px 占位，免得同一个位置出现两条线 */
  border: 1px solid transparent; border-radius: var(--radius);
  padding: 22px; display: flex; flex-direction: column; gap: 11px;
  box-shadow: var(--shadow); overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
html[data-theme="paper"] .card, html[data-theme="sepia"] .card { background: var(--panel); }
.card::before { content: ""; position: absolute; top: -1px; left: -1px; width: 16px; height: 16px; border-top: 1px solid var(--cy); border-left: 1px solid var(--cy); opacity: .8; }
.card::after { content: ""; position: absolute; bottom: -1px; right: -1px; width: 16px; height: 16px; border-bottom: 1px solid var(--cy); border-right: 1px solid var(--cy); opacity: .45; }
.card:hover { transform: translateY(-3px); box-shadow: var(--glow), var(--shadow); }

/* ------------------------------------------------------ 卡片框：明暗呼吸（方案 05）
   两个必须遵守的约束，都是踩出来的：
   ① 用**真实子元素**，不能用 ::before/::after —— .card 自己已经用它们画四角的青色角标，
      而且写死了 width:16px; height:16px。另写 ::before 会继承那个尺寸，
      「整圈框」会缩成左上角一个小方块。
   ② .card 带 overflow:hidden —— 动效层必须落在 padding box 里（inset:0）。
      放到 inset:-1px 想压住边框，会被整条裁掉，看起来就是「框是断的」。
   基线框 .card-frame 永远不消失，所以不管辉光怎么呼吸，四条边始终完整。 */
.card-frame, .card-glow {
  position: absolute; inset: 0; border-radius: inherit;
  pointer-events: none; display: block;
}
/* 基线框：用主题令牌混出来，三套主题各自成立（--line-strong 偏暗、--cy 提亮） */
.card-frame {
  border: 1px solid color-mix(in srgb, var(--line-strong) 60%, var(--cy) 40%);
  transition: border-color .2s ease;
}
.card:hover .card-frame,
.card:focus-visible .card-frame { border-color: var(--line-strong); }
/* 辉光层：线不动，整圈明暗呼吸；透明度不落到 0 以下，框不会「消失」 */
.card-glow {
  border: 1.5px solid var(--cy);
  animation: card-breath 5.6s ease-in-out infinite;
}
@keyframes card-breath {
  0%, 100% { opacity: .45; box-shadow: 0 0 0 -2px var(--cy); }
  50%      { opacity: 1;   box-shadow: 0 0 26px -6px var(--cy), inset 0 0 22px -14px var(--cy); }
}
@media (prefers-reduced-motion: reduce) {
  .card-glow { animation: none; opacity: .7; }
}

.card-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.card-code { font-family: var(--mono); font-size: 10.5px; letter-spacing: .16em; color: var(--cy-dim); }
.card h3 { margin: 2px 0 0; font-size: 22px; letter-spacing: .06em; }
.card-summary { margin: 0; color: var(--ink-soft); font-size: 14.5px; }
.card-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-top: auto; padding-top: 13px; border-top: 1px dashed var(--line); }
.free-note { font-family: var(--mono); font-size: 11.5px; color: var(--free); letter-spacing: .06em; }

.pill { font-family: var(--mono); font-size: 10.5px; letter-spacing: .14em; padding: 3px 10px; border-radius: 2px; border: 1px solid; text-transform: uppercase; }
.pill-ongoing { color: var(--am); border-color: color-mix(in srgb, var(--am) 42%, transparent); background: rgba(255, 154, 77, .09); }
.pill-done { color: var(--free); border-color: color-mix(in srgb, var(--free) 42%, transparent); background: rgba(70, 227, 176, .09); }
html[data-theme="paper"] .pill-ongoing, html[data-theme="sepia"] .pill-ongoing { background: var(--vip-soft); }
html[data-theme="paper"] .pill-done, html[data-theme="sepia"] .pill-done { background: var(--free-soft); }

.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tag { font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; color: var(--muted); border: 1px solid var(--line); border-radius: 2px; padding: 2px 9px; }

/* ------------------------------------------------------------------ 足迹 feed */
.feed { list-style: none; margin: 0; padding: 0; }
.feed li { display: flex; align-items: baseline; gap: 14px; padding: 14px 4px; border-bottom: 1px dashed var(--line); transition: background .16s ease; }
.feed li:hover { background: var(--accent-soft); }
.feed li:last-child { border-bottom: 0; }
.feed a { flex: 1; }
.feed time { font-family: var(--mono); color: var(--muted); font-size: 11.5px; }

.src {
  flex: 0 0 auto;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em;
  color: var(--src, var(--cy));
  border: 1px solid color-mix(in srgb, var(--src, var(--cy)) 45%, transparent);
  background: color-mix(in srgb, var(--src, var(--cy)) 12%, transparent);
  border-radius: 2px; padding: 1px 8px; line-height: 1.7;
  box-shadow: 0 0 18px -8px var(--src, var(--cy));
}

/* ------------------------------------------------------------------ 通用块 */
.page-head { padding: 54px 0 30px; border-bottom: 1px solid var(--line); }
.page-head h1 { margin: 0 0 12px; font-size: 32px; letter-spacing: .12em; }
.lead { margin: 0; color: var(--ink-soft); max-width: 70ch; }

.crumbs { padding: 26px 0 0; font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em; color: var(--muted); }
.crumbs a { color: var(--muted); }
.crumbs a:hover { color: var(--cy); }
.crumbs span { margin: 0 8px; color: var(--cy-dim); }

.cta-block p { max-width: 68ch; color: var(--ink-soft); }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }

.btn {
  display: inline-flex; flex-direction: column; align-items: center; gap: 2px;
  border: 1px solid var(--line-strong); background: var(--panel);
  border-radius: 3px; padding: 10px 20px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .1em;
  color: var(--ink); cursor: pointer; transition: .18s ease;
}
.btn small { font-family: var(--sans); font-size: 10.5px; letter-spacing: 0; color: var(--muted); }
.btn:hover { border-color: var(--cy); color: var(--cy); box-shadow: var(--glow); }
.btn-primary { background: linear-gradient(140deg, rgba(83, 244, 248, .16), rgba(122, 108, 255, .14)); border-color: var(--cy); color: var(--cy); }
.btn-primary:hover { background: linear-gradient(140deg, rgba(83, 244, 248, .28), rgba(122, 108, 255, .22)); color: #fff; }
html[data-theme="paper"] .btn-primary:hover, html[data-theme="sepia"] .btn-primary:hover { color: #fff; }

.input {
  border: 1px solid var(--line); background: rgba(6, 10, 18, .7); color: var(--ink);
  border-radius: 3px; padding: 8px 13px;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .06em; min-width: 220px;
}
html[data-theme="paper"] .input, html[data-theme="sepia"] .input { background: var(--panel); }
.input::placeholder { color: var(--muted); }
.input:focus { outline: none; border-color: var(--cy); box-shadow: var(--glow); }

/* ------------------------------------------------------------------ 作品页 */
.work-head { padding: 30px 0 46px; border-bottom: 1px solid var(--line); }
.work-head h1 { margin: 14px 0; font-size: clamp(28px, 4.6vw, 42px); letter-spacing: .12em; }
.platform-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }

.volume { font-size: 15px; letter-spacing: .14em; color: var(--ink-soft); margin: 34px 0 14px; display: flex; align-items: center; gap: 12px; }
.volume::before { content: ""; width: 7px; height: 7px; background: var(--cy); box-shadow: 0 0 10px var(--cy); border-radius: 50%; }
.volume::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--line), transparent); }

/* 目录 = 节点列表，左侧竖线暗示网络连接 */
.toc { list-style: none; margin: 0; padding: 0 0 0 18px; border-left: 1px solid var(--line); }
.toc-item { position: relative; }
.toc-item::before {
  content: ""; position: absolute; left: -22px; top: 50%;
  width: 7px; height: 7px; margin-top: -3.5px;
  background: var(--void); border: 1px solid var(--cy-dim); border-radius: 50%;
}
.toc-item:hover::before { background: var(--cy); box-shadow: 0 0 10px var(--cy); }
.toc-link {
  display: grid; grid-template-columns: 62px 1fr auto 78px 96px;
  align-items: center; gap: 12px; padding: 12px 8px; font-size: 14.5px;
  border-bottom: 1px dashed var(--line); transition: background .16s ease;
}
.toc-link:hover { background: var(--accent-soft); }
.toc-num { font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em; color: var(--cy-dim); }
.toc-words { font-family: var(--mono); font-size: 11.5px; text-align: right; }
.toc-link time { font-family: var(--mono); font-size: 11.5px; text-align: right; }

.legend { margin-top: 28px; font-family: var(--mono); font-size: 11.5px; letter-spacing: .06em; color: var(--muted); display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }

.badge { font-family: var(--mono); font-size: 10.5px; letter-spacing: .12em; padding: 2px 9px; border-radius: 2px; border: 1px solid; line-height: 1.7; white-space: nowrap; }
.badge-free { color: var(--free); border-color: color-mix(in srgb, var(--free) 45%, transparent); background: var(--free-soft); }
.badge-vip { color: var(--vip); border-color: color-mix(in srgb, var(--vip) 45%, transparent); background: var(--vip-soft); }
.badge-external { color: var(--ext); border-color: color-mix(in srgb, var(--ext) 45%, transparent); background: var(--ext-soft); }

.work-row { display: grid; grid-template-columns: 1.6fr 1fr; gap: 36px; padding: 36px 0; border-bottom: 1px solid var(--line); }
.work-row h2 { margin: 12px 0; font-size: 25px; letter-spacing: .08em; }
.work-row p { color: var(--ink-soft); max-width: 60ch; }
.work-row-list { list-style: none; margin: 0; padding: 0; }
.work-row-list li { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--line); font-size: 14px; }
.work-row-list li.more-li { border-bottom: 0; justify-content: flex-end; }

/* ------------------------------------------------------------------ 阅读页 */
.reader { max-width: 780px; margin: 0 auto; padding: 30px 0 80px; }
.reader-head h1 { margin: 24px 0 14px; font-size: clamp(25px, 3.8vw, 33px); letter-spacing: .06em; }
.reader-meta { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; margin: 0; }
.reader-meta .muted { font-family: var(--mono); font-size: 11.5px; letter-spacing: .06em; }

.reader-tools {
  display: flex; gap: 24px; flex-wrap: wrap; align-items: center;
  margin: 28px 0 38px; padding: 12px 18px;
  border: 1px solid var(--line); border-radius: 3px; background: var(--panel);
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em;
}
.tool-group { display: flex; align-items: center; gap: 8px; }
.tool-label { color: var(--muted); }
.reader-tools button {
  border: 1px solid var(--line); background: transparent; color: var(--ink-soft);
  border-radius: 2px; padding: 4px 11px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em; cursor: pointer; transition: .16s ease;
}
.reader-tools button:hover { border-color: var(--line-strong); color: var(--ink); }
.reader-tools button.on { border-color: var(--cy); color: var(--cy); background: var(--accent-soft); box-shadow: 0 0 16px -8px var(--cy); }

.prose { font-family: var(--serif); font-size: var(--reading-size); line-height: 2.05; color: var(--ink); }
.prose p { margin: 0 0 1.4em; text-indent: 2em; }
.prose h2, .prose h3 { font-size: 1.12em; text-indent: 0; margin: 2em 0 .8em; letter-spacing: .06em; }
.prose blockquote { margin: 1.5em 0; padding: 4px 0 4px 18px; border-left: 2px solid var(--cy-dim); color: var(--ink-soft); }
.prose blockquote p { text-indent: 0; }
.prose ul, .prose ol { padding-left: 1.5em; }
.prose li { margin: .35em 0; }
.prose a { color: var(--cy); border-bottom: 1px solid color-mix(in srgb, var(--cy) 40%, transparent); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 2.5em 0; }
.page-prose { max-width: 780px; margin: 0 auto; padding: 38px 0 80px; }
.page-prose h2 { margin-top: 2.2em; }

/* 付费墙 */
.paywall { position: relative; }
.paywall-fade {
  height: 150px; margin-bottom: -150px; position: relative; z-index: 1; pointer-events: none;
  background: linear-gradient(to bottom, transparent, var(--void) 86%);
}
.paywall-card {
  position: relative; z-index: 2; margin-top: 150px;
  border: 1px solid color-mix(in srgb, var(--am) 40%, transparent);
  background: linear-gradient(158deg, rgba(28, 18, 12, .82), rgba(8, 10, 18, .92));
  border-radius: var(--radius); padding: 34px 30px;
  text-align: center; font-family: var(--sans);
  box-shadow: 0 0 60px -26px rgba(255, 154, 77, .55), var(--shadow);
}
html[data-theme="paper"] .paywall-card, html[data-theme="sepia"] .paywall-card { background: var(--panel); }
.paywall-kicker { margin: 0 0 8px; font-family: var(--mono); font-size: 10.5px; letter-spacing: .28em; color: var(--am); text-transform: uppercase; }
.paywall-card h2 { margin: 0 0 12px; font-size: 23px; letter-spacing: .08em; }
.paywall-card > p { color: var(--ink-soft); max-width: 46ch; margin: 0 auto 10px; }
.paywall-stat { font-family: var(--mono); font-size: 11.5px; letter-spacing: .06em; color: var(--muted) !important; }
.paywall-stat b { color: var(--am); }
.paywall-actions { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 24px 0 14px; }
.paywall-foot { font-size: 12.5px; color: var(--muted); margin: 0 !important; }

.external-card {
  border: 1px dashed color-mix(in srgb, var(--vi) 46%, transparent);
  background: linear-gradient(158deg, rgba(24, 20, 48, .7), rgba(8, 10, 20, .9));
  border-radius: var(--radius); padding: 34px 30px; text-align: center; font-family: var(--sans);
}
html[data-theme="paper"] .external-card, html[data-theme="sepia"] .external-card { background: var(--panel); }
.external-card h2 { margin: 8px 0 12px; letter-spacing: .08em; }
.external-card .paywall-kicker { color: var(--vi); }

.chapter-nav {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 16px; align-items: center;
  margin-top: 58px; padding-top: 28px; border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 12px; letter-spacing: .06em;
}
.chapter-nav a { display: flex; flex-direction: column; gap: 3px; color: var(--ink-soft); }
.chapter-nav a span { font-size: 10px; letter-spacing: .18em; color: var(--muted); }
.chapter-nav .prev:hover, .chapter-nav .next:hover { color: var(--cy); }
.chapter-nav .next { text-align: right; }
.chapter-nav .mid { border: 1px solid var(--line); border-radius: 2px; padding: 6px 16px; color: var(--muted); }
.chapter-nav .mid:hover { color: var(--cy); border-color: var(--cy); }

/* ------------------------------------------------------------------ 杂谈页 */
.filters { display: flex; gap: 9px; flex-wrap: wrap; padding: 28px 0 6px; }
.chip {
  border: 1px solid var(--line); background: var(--panel); color: var(--ink-soft);
  border-radius: 2px; padding: 5px 14px;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: .1em; cursor: pointer; transition: .16s ease;
}
.chip b { color: var(--muted); font-weight: 400; margin-left: 5px; }
.chip:hover { border-color: var(--line-strong); color: var(--ink); }
.chip.on { border-color: var(--cy); color: var(--cy); background: var(--accent-soft); box-shadow: 0 0 18px -8px var(--cy); }

.notes-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 18px; padding: 28px 0 44px; }
.note-card {
  position: relative;
  background: linear-gradient(158deg, var(--card), rgba(6, 10, 18, .88));
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; display: flex; flex-direction: column; gap: 11px;
  box-shadow: var(--shadow);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
html[data-theme="paper"] .note-card, html[data-theme="sepia"] .note-card { background: var(--panel); }
.note-card:hover { transform: translateY(-3px); border-color: var(--line-strong); box-shadow: var(--glow), var(--shadow); }
.note-card h3 { margin: 0; font-size: 18px; line-height: 1.55; letter-spacing: .04em; }
.note-card p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.note-top { display: flex; justify-content: space-between; align-items: center; }
.note-top time { font-family: var(--mono); font-size: 11px; letter-spacing: .06em; }
.note-link { font-family: var(--mono); font-size: 11.5px; letter-spacing: .08em; color: var(--cy); margin-top: auto; }

/* ------------------------------------------------------------------ 页脚 */
.footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, transparent, rgba(8, 12, 22, .9));
  margin-top: 44px; padding: 44px 0 32px; font-size: 14px;
}
html[data-theme="paper"] .footer, html[data-theme="sepia"] .footer { background: var(--bg-soft); }
.footer-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 28px; }
.footer-cols strong { display: block; margin-bottom: 8px; font-size: 14px; letter-spacing: .12em; }
.footer-cols strong::before { content: "▚ "; color: var(--cy); }
.footer-cols p { margin: 0 0 5px; color: var(--ink-soft); font-size: 13.5px; }
.copyright {
  margin: 30px 0 0; padding-top: 18px; border-top: 1px solid var(--line);
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em; color: var(--muted);
}

/* ------------------------------------------------------------------ 窄屏 */
@media (max-width: 860px) {
  /* 球体改成铺满首屏后，这里不再限制画布高度；文字块窄屏下可以占满整行 */
  .hero-inner > * { max-width: 100%; }
}
@media (max-width: 760px) {
  .wrap { width: calc(100% - 32px); }
  .hero { padding: 52px 0 44px; min-height: 74vh; }
  .block { padding: 42px 0; }
  .work-row { grid-template-columns: 1fr; gap: 18px; }
  .toc { padding-left: 14px; }
  .toc-link { grid-template-columns: 52px 1fr auto; row-gap: 3px; }
  .toc-words, .toc-link time { display: none; }
  .chapter-nav { grid-template-columns: 1fr 1fr; }
  .chapter-nav .mid { grid-column: 1 / -1; text-align: center; order: 3; }
  .topbar .wrap { height: auto; padding: 12px 0; flex-direction: column; align-items: flex-start; gap: 10px; }
  .sysline { display: none; }
  .nav { gap: 2px; flex-wrap: wrap; }
  .nav a { padding: 6px 9px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; animation-iteration-count: 1 !important; }
  .brand-mark::after { animation: none; }
}