/* ============================================================
   103班：音乐领军班 · 布局与导航
   悬浮玻璃导航条(由 nav.js 动态注入) + 主题开关 + 手机菜单 + 底部
   ============================================================ */

/* ---- 顶部导航:悬浮玻璃条 ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  padding: 12px 20px;     /* 20px 是全站统一的内容边距,和下面的玻璃块左右对齐 */
  background: transparent;
  border: none;
  pointer-events: none;   /* 透明区域不挡点击,只有玻璃条本身可交互 */

  /* 导航的"墨水色"与玻璃底色,默认跟随主题;
     首页首屏会覆盖成深色版本(视频太亮,白字才压得住) */
  --nav-ink: var(--text);
  --nav-ink-dim: var(--muted);
  --nav-bg: var(--glass-bg);
  --nav-brd: var(--glass-brd);
}

/* 滚动后垫在胶囊背后的柔性遮罩:内容快贴到导航时先淡出,
   再从胶囊底下滑过去,不会出现"文字正好卡在胶囊上沿"的割裂感 */
.site-header::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 190px;
  pointer-events: none;
  background: linear-gradient(180deg, var(--bg0) 0%, var(--bg0) 42%, transparent 100%);
  opacity: 0;
  transition: opacity 0.28s ease-out;
}
.site-header.nav-scrolled::before { opacity: 1; }

.nav {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  height: 58px;
  padding: 0 10px 0 16px;
  border-radius: 999px;
  /* 掠光 + --nav-bg:首屏会临时把 --nav-bg 换成更深的版本,这里跟着一起变 */
  background: var(--glass-sheen), var(--nav-bg);
  -webkit-backdrop-filter: blur(26px) saturate(180%);
  backdrop-filter: blur(26px) saturate(180%);
  border: 1px solid var(--nav-brd);
  box-shadow: var(--glass-rim);
  /* 0.6s:和页面底色一起慢速淡变,切主题时不会"导航先变、背景后变"。
     后两项是收成小圆时的淡出/上移,只走合成属性 */
  transition: background-color 0.6s ease, border-color 0.6s ease, box-shadow 0.6s ease,
    opacity 0.24s ease, transform 0.24s cubic-bezier(0.34, 1.4, 0.64, 1);
}

/* 滚起来之后:胶囊变成实底 + 更重的投影。
   底色/描边/投影收得快一点(0.28s),淡出与位移保持上面那 0.24s 不变 */
.site-header.nav-scrolled .nav {
  background: var(--glass-sheen), var(--nav-solid);
  border-color: var(--line);
  box-shadow: var(--glass-rim), 0 14px 38px rgba(0, 0, 0, 0.18);
  transition-duration: 0.28s, 0.28s, 0.28s;
}

/* 收成小圆圈:整条胶囊淡出上移,左边的小圆淡入放大。
   两个都只动 opacity / transform(合成属性),不碰宽高与内边距,
   所以整个收放过程一次排版都不用做 —— 这是它现在不卡的关键。
   点一下就地展开(JS 摘掉这个类),点空白处或滚回顶部再收回去 */
.site-header.nav-collapsed .nav {
  opacity: 0;
  transform: translateY(-10px) scale(0.97);
  pointer-events: none;
  cursor: pointer;
}

/* 左边的小圆:滚下去之后只剩它。绝对定位对齐胶囊的左边缘 */
.nav-orb {
  position: absolute;
  top: 50%;
  left: max(20px, calc((100% - var(--maxw)) / 2));
  width: 56px;
  height: 56px;
  margin-top: -28px;
  display: grid;
  place-items: center;
  padding: 0;
  border-radius: 50%;
  background: var(--glass-sheen), var(--nav-solid);
  border: 1px solid var(--line);
  box-shadow: var(--glass-rim), 0 14px 34px rgba(0, 0, 0, 0.24);
  cursor: pointer;
  opacity: 0;
  transform: scale(0.4);
  pointer-events: none;
  /* 回弹手感:展开时轻微过冲一点点,收起时不拖泥带水 */
  transition: opacity 0.2s ease, transform 0.32s cubic-bezier(0.34, 1.5, 0.64, 1),
    background-color 0.6s ease, border-color 0.6s ease, box-shadow 0.6s ease;
}
.site-header.nav-collapsed .nav-orb { opacity: 1; transform: scale(1); pointer-events: auto; }
.nav-orb img {
  width: 34px;
  height: 34px;
  display: block;
  border-radius: 9px;
  box-shadow: 0 0 16px rgba(240, 185, 11, 0.28);
  transition: transform 0.3s cubic-bezier(0.34, 1.3, 0.64, 1);
}
.nav-orb:hover img { transform: scale(1.1) rotate(-4deg); }

.nav-logo {
  flex: none;
  display: flex;
  align-items: center;
  gap: 10px;
}
/* 品牌文字:收成圆圈时折起来只留 Logo 方块(靠 max-width 过渡,不跳) */
.nav-logo > span {
  display: block;
  max-width: 240px;
  overflow: hidden;
  white-space: nowrap;
  transition: max-width 0.2s ease-out, opacity 0.2s ease;
}
.site-header.nav-collapsed .nav-logo > span { max-width: 0; opacity: 0; }
.nav-logo img {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 0 18px rgba(240, 185, 11, 0.28);
  /* 收成圆圈后悬停会轻轻放大一下,告诉用户"这里可以点" */
  transition: transform 0.3s cubic-bezier(0.34, 1.3, 0.64, 1), box-shadow 0.3s ease;
}
.nav-logo b {
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 2px;
  color: var(--nav-ink);
  transition: color 0.6s ease;
}
.nav-logo small {
  display: block;
  font-size: 0.6rem;
  letter-spacing: 3px;
  color: var(--gold);
  text-transform: uppercase;
}

/* 桌面导航链接:整体靠右,一条药丸菜单(悬停/当前项铺底,不再用下划线) */
.nav-links {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;   /* 把菜单和右侧按钮一起推到右边,左边只留品牌 */
  min-width: 0;
  /* 窗口再窄也不会把按钮挤出胶囊,实在放不下就在菜单内横向滑动 */
  overflow-x: auto;
  scrollbar-width: none;
  max-width: 100%;   /* 有个基准值,收圆圈的 0 才能被过渡出来 */
  /* 收成圆圈时整组淡出并压成 0 宽,不和弹簧抢时间 */
  transition: max-width 0.2s ease-out, opacity 0.2s ease;
}
.nav-links::-webkit-scrollbar { display: none; }
.nav-links a {
  position: relative;
  padding: 8px 12px;
  border-radius: 999px;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 1px;
  font-size: 0.86rem;
  white-space: nowrap;
  color: var(--nav-ink-dim);
  transition: color 0.25s ease, background-color 0.25s ease;
}
.nav-links a:hover { color: var(--nav-ink); background: var(--chip); }
.nav-links a.active { color: var(--gold); background: var(--gold-soft); }

/* 右侧控件组:通知铃铛 / 管理后台 / 账号 / 外观 / 汉堡,统一排成一行 */
.nav-tools {
  flex: none;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  max-width: 100%;
  transition: max-width 0.2s ease-out, opacity 0.2s ease;
}

/* ---- 外观按钮:玻璃圆钮,点开深色/浅色 + 主题色面板 ---- */
.theme-toggle {
  flex: none;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--chip);
  border: 1px solid var(--nav-brd);
  color: var(--nav-ink);
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.6s ease, color 0.6s ease, transform 0.25s ease, border-color 0.6s ease;
}
.theme-toggle:hover { transform: scale(1.08); background: var(--gold-soft); }
.theme-toggle:active { transform: scale(0.96); }
.theme-toggle:focus-visible { outline: 2px solid var(--gold); outline-offset: 2px; }
.theme-toggle svg { width: 19px; height: 19px; display: block; }

/* ---- 账号入口:没登录是「登录」,登录了显示头像 + 名字 ---- */
.nav-account {
  flex: none;
  display: flex;
  align-items: center;
  gap: 8px;
  height: 40px;
  padding: 0 14px;
  border-radius: 999px;
  background: var(--chip);
  border: 1px solid var(--nav-brd);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 1px;
  color: var(--nav-ink-dim);
  max-width: 170px;
  -webkit-tap-highlight-color: transparent;
  transition: background-color 0.6s ease, color 0.6s ease,
    border-color 0.6s ease, transform 0.25s ease, padding 0.28s ease;
}
.nav-account:hover { transform: scale(1.04); background: var(--gold-soft); color: var(--nav-ink); }
.nav-account.is-in { color: var(--gold); padding-left: 5px; }
.nav-account .acc-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 130px;
  transition: max-width 0.28s ease, opacity 0.2s ease;
}
.nav-account .acc-ico { width: 17px; height: 17px; display: block; }
.nav-account .acc-avatar {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  display: grid;
  place-items: center;
  font-size: 0.88rem;
  font-weight: 900;
  color: #0b0f1a;
  background: linear-gradient(135deg, var(--gold), var(--gold-2));
}

/* ── 管理后台入口:只有服主 / 管理员看得到,金色描边小药丸 ── */
.nav-admin {
  flex: none;
  display: flex;
  align-items: center;
  height: 40px;
  padding: 0 15px;
  border-radius: 999px;
  background: var(--gold-soft);
  border: 1px solid var(--gold-line);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 1px;
  color: var(--gold);
  transition: background-color 0.4s ease, color 0.3s ease, transform 0.2s ease;
}
.nav-admin[hidden] { display: none; }
.nav-admin:hover { transform: scale(1.04); background: var(--gold); color: #0b0f1a; }

/* 汉堡按钮(手机才显示) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--nav-brd);
  border-radius: 10px;
  padding: 10px 11px;
  cursor: pointer;
}
.nav-toggle span {
  width: 20px;
  height: 2px;
  background: var(--nav-ink);
  transition: 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- 底部信息栏:所有页面保持一致,固定不随滚动消失 ---- */
body { padding-bottom: 48px; } /* 给固定信息栏留出空间,避免遮住正文 */

.site-footer {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 150;
  padding: 10px 20px 13px;
  text-align: center;
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  color: var(--faint);
  /* 玻璃底栏:全站统一的固定信息栏也做成毛玻璃 */
  background-color: var(--glass-bg);
  background-image: var(--glass-sheen);
  -webkit-backdrop-filter: blur(26px) saturate(180%);
  backdrop-filter: blur(26px) saturate(180%);
  border-top: 1px solid var(--glass-brd);
  box-shadow: var(--glass-rim);
  pointer-events: none; /* 不干扰主视觉与点击 */
  transition: color 0.6s ease, background-color 0.6s ease,
    border-color 0.6s ease, box-shadow 0.6s ease;
}
.site-footer b {
  color: var(--muted);
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.2em;
  transition: color 0.6s ease;
}
.site-footer em { color: var(--gold); font-style: normal; opacity: 0.75; transition: color 0.6s ease; }
.site-footer i { display: inline-block; margin: 0 10px; font-style: normal; opacity: 0.5; }

/* ---- 各子页面共用页头(横幅) ----
   玻璃横幅 + 细网格地层 + 四角 HUD 括号 + 呼吸柔光,
   只靠 CSS 就覆盖全部子页面,页面 HTML 一个字都不用动 */
.page-hero {
  padding: 96px 20px 70px;
  text-align: center;
  position: relative;
  overflow: hidden;
  isolation: isolate;   /* 让两个伪元素老老实实待在横幅内部 */
  /* 玻璃横幅:半透明 + 背景模糊 + 顶部柔光,替掉原来的实色渐变带 */
  background-color: var(--glass-bg);
  background-image: var(--glass-sheen),
    radial-gradient(120% 150% at 50% -24%, var(--gold-soft), transparent 62%);
  -webkit-backdrop-filter: blur(26px) saturate(180%);
  backdrop-filter: blur(26px) saturate(180%);
  border-bottom: 1px solid var(--glass-brd);
  box-shadow: var(--glass-rim);
  /* 入场只淡入,不做位移:横幅整条都带 backdrop-filter,
     一 translate 就要每帧重算一次背景模糊,进场那半秒会明显掉帧 */
  animation: hero-fade 0.45s ease-out both;
  transition: background-color 0.6s ease, border-color 0.6s ease, box-shadow 0.6s ease;
}
@keyframes hero-fade { from { opacity: 0 } to { opacity: 1 } }

/* 网格地层:两条渐变轴铺出细网格,顶部最实、往下淡出,像一张摊开的坐标纸 */
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: radial-gradient(128% 96% at 50% 0%, #000 0%, rgba(0, 0, 0, 0.4) 58%, transparent 80%);
  mask-image: radial-gradient(128% 96% at 50% 0%, #000 0%, rgba(0, 0, 0, 0.4) 58%, transparent 80%);
  opacity: 0.62;
  /* 只入场闪一次,不做无限呼吸:常驻动画会让整条横幅一直重绘 */
  animation: hero-grid-in 0.9s ease-out both;
}
@keyframes hero-grid-in { from { opacity: 0 } to { opacity: 0.62 } }

/* HUD 四角括号:八条细线(每角一横一竖)拼出来,纯背景层,不占元素 */
.page-hero::after {
  content: "";
  position: absolute;
  inset: 26px 30px;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
  background-repeat: no-repeat;
  background-image:
    linear-gradient(var(--gold-line), var(--gold-line)),
    linear-gradient(var(--gold-line), var(--gold-line)),
    linear-gradient(var(--gold-line), var(--gold-line)),
    linear-gradient(var(--gold-line), var(--gold-line)),
    linear-gradient(var(--gold-line), var(--gold-line)),
    linear-gradient(var(--gold-line), var(--gold-line)),
    linear-gradient(var(--gold-line), var(--gold-line)),
    linear-gradient(var(--gold-line), var(--gold-line));
  background-size:
    30px 1px, 1px 30px,
    30px 1px, 1px 30px,
    30px 1px, 1px 30px,
    30px 1px, 1px 30px;
  background-position:
    left top, left top,
    right top, right top,
    left bottom, left bottom,
    right bottom, right bottom;
}

/* 眉标:小药丸 + 一颗脉冲光点 */
.page-hero .no {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 6px 15px;
  border-radius: 999px;
  background: var(--chip);
  border: 1px solid var(--gold-line);
  font-family: var(--font-latin);
  color: var(--gold);
  letter-spacing: 0.3em;      /* 宽字距:稀疏高级感 */
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  transition: color 0.6s ease, background-color 0.6s ease, border-color 0.6s ease;
}
.page-hero .no::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 8px var(--gold-line);
}
/* 脉冲圈:只用 transform + opacity,走合成层,不会让横幅整条重绘 */
.page-hero .no::after {
  content: "";
  position: absolute;
  left: 18px;
  top: 50%;
  width: 6px;
  height: 6px;
  margin: -3px 0 0 -3px;
  border-radius: 50%;
  background: var(--gold);
  pointer-events: none;
  animation: hero-dot 2.1s ease-out infinite;
}
@keyframes hero-dot {
  0%   { transform: scale(1);   opacity: 0.55; }
  70%  { transform: scale(3.4); opacity: 0; }
  100% { transform: scale(3.4); opacity: 0; }
}

.page-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;           /* 主标题极粗 */
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  line-height: 1.1;
  letter-spacing: 0.08em;
  margin-top: 20px;
  /* 标题自带一层柔光,像被灯打亮 */
  text-shadow: 0 0 46px var(--gold-line), 0 0 14px var(--gold-soft);
  view-transition-name: hero-title; /* 与首页主标题共享元素过渡 */
  transition: text-shadow 0.6s ease;
}

/* 副标题:上面压一条中间亮的分割线,线中心再点一颗小菱形 */
.page-hero p {
  position: relative;
  color: var(--muted);
  margin-top: 30px;
  padding-top: 26px;
  font-family: var(--font-latin);
  font-weight: 300;           /* 副信息细字重,与主标题形成反差 */
  letter-spacing: 0.35em;
  text-transform: uppercase;
  font-size: 0.8rem;
  opacity: 0.78;
  transition: color 0.6s ease;
}
.page-hero p::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: min(280px, 48vw);
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-line), transparent);
}
.page-hero p::after {
  content: "";
  position: absolute;
  top: -3px;
  left: 50%;
  width: 7px;
  height: 7px;
  transform: translateX(-50%) rotate(45deg);
  background: var(--gold);
  box-shadow: 0 0 12px var(--gold-line);
}

/* 系统开了"减少动效"就把入场闪和脉冲停掉 */
@media (prefers-reduced-motion: reduce) {
  .page-hero::before,
  .page-hero .no::after { animation: none; }
}

/* 导航 Logo:子页面之间保持位置稳定 */
.nav-logo { view-transition-name: nav-logo; }

/* ---- 响应式 ---- */

/* 980~1160:菜单项先收紧,品牌文字让位,别把「班级公告」挤出胶囊 */
@media (max-width: 1160px) {
  .nav-logo > span { display: none; }
}

/* 更窄的桌面窗口:菜单项再压一档,账号只留头像 */
@media (max-width: 1000px) {
  .nav-links a { padding: 8px 9px; font-size: 0.8rem; letter-spacing: 0.5px; }
  .nav-account { padding: 0 10px; }
  .nav-account.is-in { padding-left: 5px; }
  .nav-account .acc-text { display: none; }
}

@media (max-width: 820px) {
  .nav-toggle { display: flex; }
  /* 手机上品牌文字重新显示(滚动时仍会折起来) */
  .nav-logo > span { display: block; }

  /* 手机导航条窄,而 logo 和右侧工具组原本都是 flex:none、一点都不肯缩,
     两边加起来一旦超过胶囊宽度,最右边的汉堡就被挤出圆角外面(用户报的 bug)。
     这里让品牌文字先让位:可收缩、放不下就打省略号,工具组固定贴右,
     汉堡就永远留在胶囊里面了 */
  .nav-logo { flex: 1 1 auto; min-width: 0; }
  .nav-logo img { flex: none; }
  .nav-logo > span { min-width: 0; max-width: 100%; overflow: hidden; }
  .nav-logo b,
  .nav-logo small {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .nav-tools { flex: none; margin-left: auto; gap: 8px; }

  .nav-links { overflow: visible; }

  /* 手机的「管理后台」被 nav.js 挪进了下拉菜单,跟着菜单样式走 */
  .nav-links .nav-admin {
    justify-content: center;
    margin-top: 8px;
    padding: 11px 15px;
    border-radius: 14px;
  }

  /* 底部信息栏在手机上会折成两行,多留一点高度,别压住正文 */
  body { padding-bottom: 66px; }
  .site-footer { font-size: 0.62rem; letter-spacing: 0.08em; line-height: 1.6; }

  .nav-links {
    position: fixed;
    top: 82px;
    left: 20px;
    right: 20px;
    margin-left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 14px 14px;
    border-radius: 24px;
    /* 用 --nav-bg:首页首屏(深色导航)时展开也是深色,不会白字白底 */
    background: var(--glass-sheen), var(--nav-bg);
    -webkit-backdrop-filter: blur(26px) saturate(180%);
    backdrop-filter: blur(26px) saturate(180%);
    border: 1px solid var(--nav-brd);
    box-shadow: var(--glass-rim);
    transform: translateY(-130%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.32s ease;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a {
    text-align: center;
    padding: 13px;
    border-radius: 12px;
    border-bottom: 1px solid var(--line);
  }
  .nav-links a:last-child { border-bottom: none; }

  .section { padding: 48px 0; }
  .section-title { font-size: 1.5rem; }

  /* 手机上把页头的上下留白收一收,四角括号也跟着缩 */
  .page-hero { padding: 86px 18px 58px; }
  .page-hero::after { inset: 18px 20px; }
  .page-hero h1 { margin-top: 16px; }
  .page-hero p { margin-top: 24px; padding-top: 22px; }

  /* 手机导航条挤不下文字:账号入口只留图标 / 头像 */
  .nav-account { padding: 0 11px; }
  .nav-account.is-in { padding-left: 5px; }
  .nav-account .acc-text { display: none; }
}

/* 小屏手机(多数竖屏机型):按钮再收一档,给品牌文字多留一点位置 */
@media (max-width: 460px) {
  .nav-tools { gap: 6px; }
  .theme-toggle,
  .nav-bell { width: 36px; height: 36px; }
  .nav-account { padding: 0 9px; }
  .nav-toggle { padding: 9px 10px; }
}

/* ============================================================
   开屏弹窗:10.3 官网正式成立
   ============================================================ */
.splash {
  position: fixed;
  inset: 0;
  z-index: 600;
  display: grid;
  place-items: center;
  padding: 22px;
  background: rgba(3, 5, 10, 0.55);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  opacity: 0;
  transition: opacity 0.32s ease;
}
.splash.in { opacity: 1; }

.splash-card {
  width: 100%;
  max-width: 440px;
  max-height: 86vh;
  overflow-y: auto;
  padding: 32px 28px 26px;
  border-radius: 26px;
  text-align: center;
  background: var(--glass-surface);
  -webkit-backdrop-filter: blur(26px) saturate(180%);
  backdrop-filter: blur(26px) saturate(180%);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--glass-rim);
  transform: translateY(18px) scale(0.97);
  transition: transform 0.32s cubic-bezier(0.22, 1, 0.36, 1);
}
.splash.in .splash-card { transform: none; }

.splash-no {
  font-family: var(--font-latin);
  font-size: 0.72rem;
  letter-spacing: 0.5em;   /* 极宽字距:和全站海报排版统一 */
  text-indent: 0.5em;
  color: var(--gold);
  transition: color 0.6s ease;
}
.splash-title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.5rem;
  letter-spacing: 3px;
  margin-top: 12px;
  color: var(--text);
  transition: color 0.6s ease;
}
.splash-lead {
  margin-top: 10px;
  font-size: 0.86rem;
  color: var(--muted);
  transition: color 0.6s ease;
}
.splash-list {
  margin: 20px 0 4px;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.splash-list li {
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--muted);
  padding-left: 16px;
  position: relative;
  transition: color 0.6s ease;
}
.splash-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--gold), var(--gold-2));
}
.splash-foot {
  display: flex;
  gap: 10px;
  margin-top: 24px;
}
.splash-btn {
  flex: 1;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.86rem;
  letter-spacing: 2px;
  padding: 12px 0;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  color: #0b0f1a;
  background: linear-gradient(120deg, var(--gold), var(--gold-2));
  box-shadow: 0 8px 22px rgba(240, 185, 11, 0.24);
  transition: transform 0.2s ease, background-color 0.6s ease, color 0.6s ease;
}
.splash-btn:hover { transform: translateY(-1px); }
.splash-btn.ghost {
  color: var(--gold);
  background: var(--gold-soft);
  border: 1px solid var(--gold-line);
  box-shadow: none;
}

@media (max-width: 520px) {
  .splash-card { padding: 26px 20px 22px; border-radius: 22px; }
  .splash-title { font-size: 1.28rem; }
}

/* ============================================================
   外观面板:导航栏「外观」按钮弹出的玻璃卡
   深色 / 浅色两枚按钮 + 四套主题色 swatch
   ============================================================ */
.appear-pop {
  position: fixed;
  top: 74px;
  right: max(16px, calc((100vw - 1180px) / 2));
  z-index: 65;
  width: min(300px, calc(100vw - 32px));
  padding: 16px 16px 14px;
  border-radius: 18px;
  background: var(--glass-surface);
  -webkit-backdrop-filter: blur(26px) saturate(180%);
  backdrop-filter: blur(26px) saturate(180%);
  border: 1px solid var(--glass-brd);
  box-shadow: var(--glass-rim);
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.appear-pop[hidden] { display: none; }
.appear-pop.in { opacity: 1; transform: translateY(0); }

.appear-pop .ap-title,
.appear-pop .ap-sub {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--faint);
  text-transform: uppercase;
  transition: color 0.6s ease;
}
.appear-pop .ap-sub { margin: 15px 0 9px; }

/* 深色 / 浅色 */
.ap-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}
.ap-opt {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--chip);
  color: var(--muted);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.84rem;
  letter-spacing: 1px;
  cursor: pointer;
  transition: color 0.3s ease, background-color 0.4s ease,
    border-color 0.4s ease, transform 0.2s ease;
}
.ap-opt svg { width: 17px; height: 17px; }
.ap-opt:hover { color: var(--text); transform: translateY(-1px); }
.ap-opt.active {
  color: var(--gold);
  background: var(--gold-soft);
  border-color: var(--gold-line);
}

/* 主题色 swatch */
.ap-skins {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}
.ap-skin {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 11px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--chip);
  cursor: pointer;
  transition: border-color 0.4s ease, background-color 0.4s ease,
    transform 0.2s ease;
}
.ap-skin:hover { transform: translateY(-1px); background: var(--gold-soft); }
.ap-skin.active { border-color: var(--gold-line); background: var(--gold-soft); }
.ap-dots { display: inline-flex; flex: none; }
.ap-dots i {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 1.5px solid var(--glass-brd);
  display: block;
}
.ap-dots i + i { margin-left: -6px; }
.ap-skin-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 1.5px;
  color: var(--muted);
  transition: color 0.6s ease;
}
.ap-skin.active .ap-skin-name { color: var(--gold); }
.ap-hint {
  margin-top: 12px;
  font-size: 0.68rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--faint);
  transition: color 0.6s ease;
}

@media (max-width: 620px) {
  .appear-pop { top: 68px; right: 12px; }
}

/* ---- Markdown 工具栏:插在 textarea 上面,由 nav.js 生成 ---- */
.md-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}
.md-btn {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.74rem;
  letter-spacing: 1px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--chip);
  border: 1px solid var(--line);
  color: var(--muted);
  cursor: pointer;
  transition: color 0.25s ease, background-color 0.4s ease, border-color 0.4s ease,
    opacity 0.3s ease;
}
.md-btn:hover { color: var(--gold); border-color: var(--gold-line); background: var(--gold-soft); }
.md-btn:disabled { opacity: 0.45; cursor: default; }