/* ==========================================================================
   一介凡人 · 基础层
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--ink-900);
  color: var(--text);
  font-family: var(--reading);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.012em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 夜色：两团极淡的灵光 + 底部沉墨 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(60vw 50vh at 78% -6%, rgba(77, 125, 104, 0.16), transparent 62%),
    radial-gradient(50vw 46vh at 8% 12%, rgba(120, 140, 120, 0.07), transparent 60%),
    radial-gradient(120vw 80vh at 50% 120%, rgba(0, 0, 0, 0.75), transparent 70%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-950) 100%);
}

/* 纸纹颗粒：全站覆盖，很轻 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.6'/%3E%3C/svg%3E");
}

img,
svg,
canvas {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
  text-underline-offset: 0.28em;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--realm);
}

p {
  margin: 0 0 1em;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.18;
  letter-spacing: 0.02em;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

input,
select,
textarea {
  font: inherit;
  color: inherit;
}

::selection {
  background: var(--cinnabar);
  color: var(--paper);
}

:focus-visible {
  outline: 2px solid var(--realm);
  outline-offset: 3px;
}

/* 滚动条 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
::-webkit-scrollbar-track {
  background: var(--ink-950);
}
::-webkit-scrollbar-thumb {
  background: var(--ink-600);
  border: 2px solid var(--ink-950);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--ink-500);
}

/* ==========================================================================
   排版与通用件
   ========================================================================== */

.wrap {
  width: min(100% - var(--pad-x) * 2, var(--w-page));
  margin-inline: auto;
}
.wrap--wide {
  width: min(100% - var(--pad-x) * 2, var(--w-wide));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.noscript {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: grid;
  place-items: center;
  padding: 28px;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--kai);
  font-size: 16px;
  line-height: 1.9;
  letter-spacing: 0.1em;
  text-align: center;
}

.kai {
  font-family: var(--kai);
  letter-spacing: 0.06em;
}

.dim {
  color: var(--muted);
}

.tiny {
  font-size: 12px;
  line-height: 1.7;
}

.hairline {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* 朱印 */
.seal {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  background: var(--cinnabar);
  color: #f3e9d4;
  font-family: var(--kai);
  font-size: 19px;
  line-height: 1;
  letter-spacing: 0;
  border-radius: 1px;
  transform: rotate(-2deg);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
  user-select: none;
}
.seal--lg {
  width: 56px;
  height: 56px;
  font-size: 30px;
}
.seal--ghost {
  background: transparent;
  color: var(--cinnabar-2);
  box-shadow: inset 0 0 0 1px var(--cinnabar);
}

/* 按钮 */
.btn {
  --btn-bg: transparent;
  --btn-fg: var(--text);
  --btn-bd: var(--line-3);
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6em;
  padding: 0.85em 1.5em;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-bd);
  border-radius: var(--r);
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: 0.14em;
  line-height: 1;
  transition:
    background var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
  text-align: center;
}
.btn:hover {
  border-color: var(--text);
  background: rgba(233, 227, 211, 0.06);
  color: var(--text);
}
.btn:active {
  transform: translateY(1px);
}
.btn--primary {
  --btn-bg: var(--cinnabar);
  --btn-fg: #f6ecda;
  --btn-bd: var(--cinnabar);
}
.btn--primary:hover {
  background: #bd4d37;
  border-color: #bd4d37;
  color: #fff8ea;
}
.btn--paper {
  --btn-bg: var(--paper);
  --btn-fg: var(--paper-ink);
  --btn-bd: var(--paper);
}
.btn--paper:hover {
  background: #f2ecdc;
  border-color: #f2ecdc;
  color: var(--paper-ink);
}
.btn--sm {
  padding: 0.62em 1em;
  font-size: 13px;
  letter-spacing: 0.1em;
}
.btn--block {
  width: 100%;
}
.btn[disabled] {
  opacity: 0.38;
  pointer-events: none;
}

/* 文字链接 */
.tlink {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--kai);
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--text-soft);
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 0.35em;
  transition: color var(--dur), border-color var(--dur);
}
.tlink:hover {
  color: var(--realm);
  border-color: var(--realm);
}
.tlink::after {
  content: "›";
  font-family: var(--latin);
  font-size: 1.1em;
  line-height: 0;
  transform: translateY(-1px);
}

/* 章节眉标：真实的顺序，用汉字编号 */
.chapter {
  display: flex;
  align-items: baseline;
  gap: 1.1em;
  margin-bottom: clamp(24px, 3vw, 44px);
}
.chapter-no {
  font-family: var(--kai);
  font-size: 14px;
  letter-spacing: 0.3em;
  color: var(--cinnabar-2);
  white-space: nowrap;
}
.chapter-title {
  font-size: clamp(26px, 3.4vw, 44px);
  font-weight: 600;
  letter-spacing: 0.06em;
}
.chapter-note {
  font-family: var(--kai);
  font-size: 14px;
  color: var(--muted);
  letter-spacing: 0.08em;
  margin-left: auto;
  text-align: right;
}
@media (max-width: 720px) {
  .chapter-note {
    display: none;
  }
}

/* 进场：只在首次进入时演一次 */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 900ms var(--ease),
    transform 900ms var(--ease);
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   顶栏
   ========================================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 60;
  height: 64px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition:
    background 400ms var(--ease),
    border-color 400ms var(--ease),
    backdrop-filter 400ms;
}
.nav.is-solid {
  background: rgba(9, 12, 9, 0.82);
  backdrop-filter: blur(14px) saturate(1.1);
  border-color: var(--line);
}
.nav .wrap {
  display: flex;
  align-items: center;
  gap: 28px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-right: auto;
  letter-spacing: 0.1em;
}
.brand .seal {
  width: 28px;
  height: 28px;
  font-size: 15px;
}
.brand-name {
  font-size: 16px;
  letter-spacing: 0.22em;
  white-space: nowrap;
}
.brand-name em {
  font-style: normal;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.16em;
  margin-left: 0.6em;
  font-family: var(--kai);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.55vw, 24px);
  font-family: var(--kai);
  font-size: 13.5px;
  letter-spacing: 0.12em;
  color: var(--text-soft);
}
.nav-links a {
  position: relative;
  padding: 6px 0;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 50%;
  right: 50%;
  bottom: 0;
  height: 1px;
  background: var(--realm);
  transition:
    left var(--dur) var(--ease),
    right var(--dur) var(--ease);
}
.nav-links a:hover {
  color: var(--text);
}
.nav-links a:hover::after {
  left: 0;
  right: 0;
}
.nav-more {
  position: relative;
  display: flex;
  align-items: center;
}
.nav-more-toggle {
  padding: 6px 0;
  border: 0;
  background: transparent;
  color: var(--text-soft);
  font: inherit;
  letter-spacing: inherit;
  cursor: pointer;
}
.nav-more-toggle:hover,
.nav-more-toggle:focus-visible,
.nav-more-toggle[aria-expanded="true"] {
  color: var(--text);
}
.nav-more-menu {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  z-index: 70;
  min-width: 132px;
  padding: 6px;
  border: 1px solid var(--line-2);
  background: rgba(12, 15, 12, 0.97);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.32);
}
.nav-more-menu[hidden] { display: none; }
.nav-more-menu a {
  display: block;
  padding: 9px 12px;
  color: var(--text-soft);
  font-size: 13px;
  letter-spacing: 0.1em;
  white-space: nowrap;
}
.nav-more-menu a::after { display: none; }
.nav-more-menu a:hover,
.nav-more-menu a:focus-visible {
  color: var(--text);
  background: rgba(255, 255, 255, 0.045);
}
html[data-theme="day"] .nav-more-menu {
  background: rgba(250, 247, 239, 0.98);
}
html[data-theme="day"] .nav-more-menu a:hover,
html[data-theme="day"] .nav-more-menu a:focus-visible {
  background: rgba(40, 70, 56, 0.06);
}
.nav-cta {
  margin-left: 4px;
}
.theme-toggle {
  min-height: 34px;
  padding: 0 9px;
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--text-soft);
  font-family: var(--kai);
  font-size: 12px;
  letter-spacing: 0.08em;
  cursor: pointer;
}
.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: var(--jade);
  color: var(--text);
}
.nav-drawer .theme-toggle,
.nav-drawer .theme-toggle-more {
  width: 100%;
  min-height: 44px;
  margin-top: 8px;
  border-color: var(--line);
  color: var(--text-soft);
  text-align: left;
  font-family: var(--kai);
  font-size: 16px;
  letter-spacing: 0.12em;
}
.nav-drawer .theme-toggle {
  padding: 14px 0;
  border-width: 0 0 1px;
  background: transparent;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 1px solid var(--line-2);
  font-size: 18px;
}
@media (max-width: 860px) {
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: grid;
  }
  .brand-name em {
    display: none;
  }
}
/* 移动端抽屉 */
.nav-drawer {
  position: fixed;
  inset: 64px 0 auto 0;
  z-index: 59;
  background: rgba(9, 12, 9, 0.97);
  border-bottom: 1px solid var(--line);
  padding: 18px var(--pad-x) 30px;
  display: grid;
  gap: 2px;
  font-family: var(--kai);
  font-size: 18px;
  letter-spacing: 0.16em;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition:
    opacity 200ms,
    transform 200ms,
    visibility 0s linear 200ms;
}
.nav-drawer.is-open {
  opacity: 1;
  visibility: visible;
  transform: none;
  pointer-events: auto;
  transition-delay: 0s;
}
.nav-drawer a {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.menu-block {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.menu-label {
  font-family: var(--kai);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}
.menu-speeds {
  display: flex;
  gap: 4px;
  margin-left: auto;
}
.menu-speeds button {
  border: 1px solid var(--line);
  padding: 5px 8px;
  font-family: var(--latin);
  font-size: 12px;
  color: var(--muted);
}
.menu-speeds button.on {
  background: var(--realm);
  color: var(--paper-ink);
  border-color: var(--realm);
}
.menu-action {
  width: 100%;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-family: var(--kai);
  font-size: 16px;
  letter-spacing: 0.12em;
  color: var(--text-soft);
}
.menu-action:hover {
  color: var(--text);
}

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
  margin-top: var(--section-y);
  border-top: 1px solid var(--line);
  padding: 56px 0 40px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.9;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer h4 {
  font-family: var(--kai);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--text-soft);
  margin-bottom: 14px;
}
.footer a:hover {
  color: var(--text);
}
.footer-links {
  display: grid;
  gap: 8px;
}
.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted-2);
}
@media (max-width: 760px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

/* ==========================================================================
   小件
   ========================================================================== */
.dial-rotate {
  animation: dial-spin 180s linear infinite;
  transform-box: view-box;
}
@keyframes dial-spin {
  to {
    transform: rotate(360deg);
  }
}
.rung-world {
  font-family: var(--kai);
  font-size: 10px;
  letter-spacing: 0.3em;
  color: var(--cinnabar-2);
  padding: 10px 0 4px 24px;
  margin-left: 8px;
  border-left: 1px solid var(--line);
  position: relative;
}
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.3em 0.7em;
  border: 1px solid var(--line-2);
  font-family: var(--kai);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-soft);
  white-space: nowrap;
}
.tag--realm {
  border-color: color-mix(in srgb, var(--realm) 45%, transparent);
  color: var(--realm);
  background: var(--realm-soft);
}
.dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--realm);
  box-shadow: 0 0 10px var(--realm-glow);
}

/* 提示浮层 */
.toast-stack {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  z-index: 200;
  display: grid;
  gap: 8px;
  pointer-events: none;
}
.toast {
  background: var(--paper);
  color: var(--paper-ink);
  padding: 10px 18px;
  font-family: var(--kai);
  font-size: 13px;
  letter-spacing: 0.1em;
  box-shadow: var(--shadow-2);
  animation: toast-in 260ms var(--ease);
}
@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
}

/* 主题与字体设置 */
.theme-overlay {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
  background: rgba(5, 8, 5, 0.72);
  backdrop-filter: blur(6px);
}
html[data-theme="day"] .theme-overlay {
  background: rgba(25, 29, 23, 0.32);
}
.theme-sheet {
  width: min(560px, 100%);
  max-height: min(90vh, 720px);
  margin: auto;
  padding: 24px;
  overflow-y: auto;
  border: 1px solid var(--line-2);
  background: var(--ink-850);
  box-shadow: var(--shadow-3);
}
.theme-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.theme-kicker {
  margin: 0 0 6px;
  color: var(--cinnabar-2);
  font-family: var(--kai);
  font-size: 11px;
  letter-spacing: 0.22em;
}
.theme-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.theme-close {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  flex: none;
  border: 1px solid var(--line-2);
  color: var(--text-soft);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
}
.theme-close:hover,
.theme-close:focus-visible {
  border-color: var(--jade-2);
  color: var(--text);
}
.theme-section {
  margin-top: 20px;
}
.theme-label {
  margin: 0 0 10px;
  color: var(--muted);
  font-family: var(--kai);
  font-size: 12px;
  letter-spacing: 0.16em;
}
.theme-grid {
  display: grid;
  gap: 10px;
}
.theme-grid--two,
.theme-grid--font {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.theme-choice,
.font-choice {
  min-width: 0;
  padding: 13px 14px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-soft);
  text-align: left;
  cursor: pointer;
}
.theme-choice:hover,
.font-choice:hover,
.theme-choice:focus-visible,
.font-choice:focus-visible {
  border-color: var(--line-3);
  color: var(--text);
}
.theme-choice.is-active,
.font-choice.is-active {
  border-color: var(--jade-2);
  background: var(--realm-soft);
  color: var(--text);
}
.theme-choice b,
.font-choice b {
  display: block;
  color: var(--text);
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.08em;
}
.theme-choice span,
.font-choice span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-family: var(--kai);
  font-size: 11px;
}
.font-sample {
  margin-bottom: 8px !important;
  color: var(--text) !important;
  font-size: 20px !important;
  letter-spacing: 0.06em !important;
}
.font-choice--serif .font-sample {
  font-family: "Source Han Serif SC", "Noto Serif SC", "Songti SC", "STSong",
    "SimSun", "宋体", serif;
}
.font-choice--kai .font-sample {
  font-family: "Kaiti SC", "STKaiti", "KaiTi", "楷体", "Kaiti TC", serif;
}
.font-choice--fangsong .font-sample {
  font-family: "FangSong", "STFangsong", "仿宋", "FangSong_GB2312", serif;
}
.font-choice--sans .font-sample {
  font-family: "Source Han Sans SC", "Noto Sans SC", "PingFang SC",
    "Microsoft YaHei", "微软雅黑", sans-serif;
}
.theme-note,
.theme-status {
  margin: 10px 0 0;
  color: var(--muted-2);
  font-family: var(--kai);
  font-size: 11px;
  line-height: 1.7;
}
.theme-status {
  min-height: 1.7em;
  color: var(--jade-2);
}
@media (max-width: 520px) {
  .theme-overlay {
    align-items: flex-start;
    padding: 12px;
  }
  .theme-sheet {
    max-height: none;
    padding: 18px;
  }
  .theme-grid--two,
  .theme-grid--font {
    grid-template-columns: 1fr;
  }
}

/* 右下角主题入口：不再占用主导航 */
.theme-fab {
  position: fixed;
  right: 22px;
  bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  z-index: 80;
  min-height: 38px;
  padding: 0 15px;
  border: 1px solid var(--line-2);
  background: rgba(12, 15, 12, 0.82);
  color: var(--text-soft);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(10px);
  font-size: 12px;
  letter-spacing: 0.12em;
}
.theme-fab:hover,
.theme-fab:focus-visible {
  border-color: var(--realm);
  color: var(--text);
}
html[data-theme="day"] .theme-fab {
  background: rgba(250, 247, 239, 0.9);
}
@media (max-width: 640px) {
  .theme-fab { right: 14px; bottom: calc(14px + env(safe-area-inset-bottom, 0px)); }
}

.nav-links a.account-nav {
  max-width: 8em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}