/* ============================================================
   main.css —— 布局、玻璃组件、动效
   令牌见 tokens.css
   ============================================================ */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

/* 主题切换时的颜色过渡。切完由 JS 摘掉 —— 常驻会给 3D 画布和
   每一帧的粒子都叠上 transition，明显拖帧。 */
body.theming,
body.theming *:not(canvas):not(.no-theme-x) {
  transition: background-color .55s var(--ease-soft),
              color .55s var(--ease-soft),
              border-color .55s var(--ease-soft),
              box-shadow .55s var(--ease-soft) !important;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

::selection { background: rgba(127, 212, 232, .32); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ============================================================
   背景层：极光 + 3D 星海
   ============================================================ */

/* canvas 容器 —— 星海画在这里 */
#starfield3d {
  position: fixed;
  inset: 0;
  z-index: 0;
  display: block;
  pointer-events: auto;   /* 要能拖拽旋转视角 */
  cursor: grab;
  opacity: 0;
  transition: opacity 1.1s var(--ease-soft);
}
#starfield3d.on { opacity: 1; }
#starfield3d:active { cursor: grabbing; }
/* 首屏滚过去之后不许再拦鼠标，否则会挡住下面所有内容 */
#starfield3d.parked { pointer-events: none; }

/* 极光层 —— 纯 CSS，几团渐变叠加 + 缓慢漂移。
   放在 canvas 之上、内容之下。 */
.aurora {
  position: fixed;
  inset: -12%;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
  opacity: .9;
}

.aurora__band {
  position: absolute;
  border-radius: 50%;
  filter: blur(64px);
  mix-blend-mode: screen;   /* 深色底上 screen 让光带互相叠加发亮 */
  will-change: transform, opacity;
}
:root[data-theme="light"] .aurora__band,
:root:not([data-theme="dark"]) .aurora__band { mix-blend-mode: multiply; }

.aurora__band--1 {
  width: 62vw; height: 42vh;
  top: -6%; left: -8%;
  background: radial-gradient(circle at 40% 40%,
              rgba(var(--nebula-1), .55), transparent 66%);
  animation: aur-drift-1 26s ease-in-out infinite alternate;
}
.aurora__band--2 {
  width: 54vw; height: 38vh;
  top: 8%; right: -6%;
  background: radial-gradient(circle at 55% 45%,
              rgba(var(--nebula-2), .5), transparent 68%);
  animation: aur-drift-2 32s ease-in-out infinite alternate;
}
.aurora__band--3 {
  width: 70vw; height: 40vh;
  bottom: -12%; left: 12%;
  background: radial-gradient(circle at 50% 50%,
              rgba(var(--star-a), .34), transparent 70%);
  animation: aur-drift-3 38s ease-in-out infinite alternate;
}

@keyframes aur-drift-1 {
  0%   { transform: translate3d(0, 0, 0) scale(1); opacity: .85; }
  50%  { transform: translate3d(6vw, 4vh, 0) scale(1.14); opacity: 1; }
  100% { transform: translate3d(-3vw, 7vh, 0) scale(1.04); opacity: .8; }
}
@keyframes aur-drift-2 {
  0%   { transform: translate3d(0, 0, 0) scale(1.06); opacity: .9; }
  50%  { transform: translate3d(-7vw, 5vh, 0) scale(1); opacity: .72; }
  100% { transform: translate3d(4vw, -3vh, 0) scale(1.16); opacity: 1; }
}
@keyframes aur-drift-3 {
  0%   { transform: translate3d(0, 0, 0) scale(1); opacity: .7; }
  50%  { transform: translate3d(8vw, -4vh, 0) scale(1.1); opacity: .92; }
  100% { transform: translate3d(-5vw, 2vh, 0) scale(1.02); opacity: .76; }
}

/* 细颗粒噪点 —— 去掉渐变上的"色带"（banding），
   让整个背景看起来更像实体表面而不是渲染出来的。 */
.grain {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  opacity: .05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* 页面内容整体在背景之上 */
.page {
  position: relative;
  z-index: 3;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 26px;
}

/* ============================================================
   玻璃基类
   ============================================================ */

.glass {
  position: relative;
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--glass-shadow), var(--glass-sheen);
  transition: background-color var(--t-mid) var(--ease-out),
              border-color var(--t-mid) var(--ease-out),
              box-shadow var(--t-mid) var(--ease-out),
              transform var(--t-mid) var(--ease-out);
}

/* ============================================================
   按钮
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(14px) saturate(150%);
  backdrop-filter: blur(14px) saturate(150%);
  color: var(--ink);
  font-family: inherit;
  font-size: 14.5px;
  font-weight: 550;
  cursor: pointer;
  box-shadow: var(--glass-sheen-soft);
  transition: transform var(--t-mid) var(--ease-spring),
              background-color var(--t-mid), border-color var(--t-mid),
              box-shadow var(--t-mid);
}
.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
  background: var(--glass-bg-hi);
  border-color: var(--glass-border-hi);
  box-shadow: var(--glass-shadow);
}
.btn:active { transform: translateY(0); }

.btn--primary {
  background: linear-gradient(120deg,
              color-mix(in srgb, var(--accent) 88%, transparent),
              color-mix(in srgb, var(--accent-2) 88%, transparent));
  border-color: transparent;
  color: #05060d;
  font-weight: 650;
  box-shadow: 0 10px 28px -10px var(--accent-glow);
}
.btn--primary:hover { box-shadow: 0 16px 38px -12px var(--accent-glow); }

/* ============================================================
   区块
   ============================================================ */

.block {
  padding: 78px 0;
  position: relative;
}
.block__head { margin-bottom: 40px; }
.block__kicker {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--accent);
}
.block__kicker::before {
  content: '';
  width: 22px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent));
}
.block__title {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 680;
  letter-spacing: -.015em;
  line-height: 1.25;
}
.block__sub {
  margin: 12px 0 0;
  color: var(--ink-dim);
  max-width: 62ch;
}

/* ============================================================
   首屏
   ============================================================ */

.hero {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 96px 0 64px;
  position: relative;
}
.hero__grid {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 56px;
  align-items: center;
  width: 100%;
}

/* 头像：玻璃外环 + 缓慢自转的极光描边
   结构上分三层，用独立的子元素而不是伪元素 ——
   伪元素挖洞那层会盖住同为子元素的 .hero__badge。
   .hero__avatar      定位容器
   .hero__avatar-ring 自转的极光描边（在最下）
   img                头像本体（盖住描边内圈）
   .hero__badge       状态标签（在最上，不参与挖洞） */
.hero__avatar {
  position: relative;
  width: 224px; height: 224px;
  flex: none;
}

.hero__avatar-ring {
  position: absolute;
  inset: -4px;
  z-index: 0;
  border-radius: 50%;
  background: conic-gradient(from 0deg,
              transparent 0deg,
              var(--au-cyan) 70deg,
              var(--au-violet) 150deg,
              transparent 220deg,
              var(--au-magenta) 300deg,
              transparent 360deg);
  animation: av-spin 9s linear infinite;
  /* 不用 filter:blur —— 那会把描边糊成一大团光晕。
     改用 mask 挖掉内圈，得到一圈边界清晰的渐变描边。 */
  -webkit-mask: radial-gradient(circle, transparent 0 49%, #000 52% 100%);
  mask: radial-gradient(circle, transparent 0 49%, #000 52% 100%);
}
/* 外圈一层更淡的辉光，和清晰的描边叠出层次 */
.hero__avatar::after {
  content: '';
  position: absolute;
  inset: -16px;
  z-index: -1;
  border-radius: 50%;
  background: radial-gradient(circle,
              color-mix(in srgb, var(--accent) 42%, transparent) 0%,
              transparent 68%);
  opacity: .5;
  pointer-events: none;
}
@keyframes av-spin { to { transform: rotate(360deg); } }

.hero__avatar img {
  position: relative;
  z-index: 2;
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-2);
}

.hero__badge {
  z-index: 5;
}

.hero__badge {
  /* 放在圆环外侧偏下的位置。
     之前压着头像右下角，而头像是 z-index:2 盖在上面，
     会把标签左半边切掉一截。挪出圆形边界就没有遮挡问题。 */
  position: absolute;
  left: 50%;
  bottom: -14px;
  transform: translateX(-50%);
  z-index: 6;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  background: var(--glass-bg-hi);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow), var(--glass-sheen-soft);
  font-size: 12.5px;
  font-weight: 550;
  white-space: nowrap;
}
.hero__badge i {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 0 rgba(74, 222, 128, .7);
  animation: pulse-dot 2.4s ease-out infinite;
}
@keyframes pulse-dot {
  0%   { box-shadow: 0 0 0 0 rgba(74, 222, 128, .65); }
  70%  { box-shadow: 0 0 0 9px rgba(74, 222, 128, 0); }
  100% { box-shadow: 0 0 0 0 rgba(74, 222, 128, 0); }
}

.hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--accent);
}

.hero__name {
  margin: 0;
  font-size: clamp(46px, 8vw, 86px);
  font-weight: 750;
  line-height: 1.02;
  letter-spacing: -.03em;
  /* 渐变文字：极光光谱 */
  background: linear-gradient(105deg,
              var(--ink) 8%,
              var(--accent) 42%,
              var(--accent-2) 68%,
              var(--ink) 96%);
  background-size: 240% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: name-sheen 12s linear infinite;
}
@keyframes name-sheen {
  0%   { background-position: 0% 50%; }
  100% { background-position: 240% 50%; }
}

.hero__romaji {
  display: block;
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .42em;
  color: var(--ink-faint);
  text-transform: uppercase;
}

.hero__tagline {
  margin: 20px 0 0;
  font-size: 17px;
  color: var(--ink-soft);
  max-width: 46ch;
}
.hero__tagline strong { color: var(--ink); font-weight: 620; }

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* 打字机光标 */
.typed-caret {
  display: inline-block;
  width: 2px; height: 1.05em;
  background: var(--accent);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: caret-blink 1.05s steps(1) infinite;
}
@keyframes caret-blink { 50% { opacity: 0; } }

/* 首屏底部的提示 */
.hero__hint {
  position: absolute;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
  font-size: 12.5px;
  color: var(--ink-faint);
  white-space: nowrap;
  z-index: 4;
  pointer-events: none;
  transition: opacity var(--t-slow);
}
.hero__hint kbd {
  display: inline-block;
  margin: 0 3px;
  padding: 1px 7px;
  border: 1px solid var(--glass-border);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: var(--glass-bg);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 11.5px;
}

/* ============================================================
   滚动入场
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .78s var(--ease-out), transform .78s var(--ease-out);
}
.reveal.in { opacity: 1; transform: none; }

/* ============================================================
   玻璃卡片全家族（6 种）
   ============================================================ */

.card {
  padding: 26px;
  border-radius: var(--radius-lg);
}
.card__icon {
  width: 46px; height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  font-size: 21px;
  margin-bottom: 16px;
  background: var(--glass-bg-hi);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-sheen-soft);
}
.card h3 {
  margin: 0 0 8px;
  font-size: 17.5px;
  font-weight: 620;
}
.card p { margin: 0; color: var(--ink-dim); font-size: 14.5px; }

/* --- 种类 1：基础玻璃卡（hover 抬升 + 边框提亮） --- */
.card--basic:hover {
  transform: translateY(-5px);
  background: var(--glass-bg-hi);
  border-color: var(--glass-border-hi);
  box-shadow: var(--glass-shadow-hi), var(--glass-sheen);
}

/* --- 种类 2：3D 倾斜跟随卡 --- */
.card--tilt {
  transform-style: preserve-3d;
  will-change: transform;
  transition: box-shadow var(--t-mid);
}
.card--tilt:hover { box-shadow: var(--glass-shadow-hi), var(--glass-sheen); }
.card--tilt > * { transform: translateZ(34px); }
/* 跟随鼠标的高光点：由 JS 写入 --gx/--gy */
.card--tilt::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--t-mid);
  background: radial-gradient(340px circle at var(--gx, 50%) var(--gy, 50%),
              rgba(255, 255, 255, .13), transparent 62%);
}
.card--tilt:hover::after { opacity: 1; }

/* --- 种类 3：光泽扫过卡 --- */
.card--sheen { overflow: hidden; }
.card--sheen::before {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  left: -60%;
  width: 45%;
  pointer-events: none;
  background: linear-gradient(100deg,
              transparent,
              rgba(255, 255, 255, .16) 45%,
              rgba(255, 255, 255, .05) 55%,
              transparent);
  transform: skewX(-18deg);
  transition: left .9s var(--ease-out);
}
.card--sheen:hover::before { left: 118%; }

/* --- 种类 4：透明度层次卡（低层玻璃） --- */
.card--deep {
  background: var(--glass-bg-lo);
  box-shadow: var(--glass-sheen-soft);
}
.card--deep:hover {
  background: var(--glass-bg);
  border-color: var(--glass-border-hi);
}

/* --- 种类 5：可展开详情卡 --- */
.card--expand { cursor: pointer; }
.card--expand__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.card--expand__chev {
  margin-left: auto;
  flex: none;
  width: 26px; height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  color: var(--ink-dim);
  transition: transform var(--t-mid) var(--ease-out),
              color var(--t-mid), border-color var(--t-mid);
}
.card--expand[aria-expanded="true"] .card--expand__chev {
  transform: rotate(180deg);
  color: var(--accent);
  border-color: var(--accent);
}
/* grid-template-rows 0fr→1fr 是唯一能对"未知高度"做平滑展开的写法 */
.card--expand__body {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .42s var(--ease-out),
              opacity .3s var(--ease-out),
              margin-top .42s var(--ease-out);
  opacity: 0;
  margin-top: 0;
}
.card--expand[aria-expanded="true"] .card--expand__body {
  grid-template-rows: 1fr;
  opacity: 1;
  margin-top: 14px;
}
.card--expand__body > div { overflow: hidden; }

/* --- 种类 6：玻璃悬浮卡（浮在头像/图标上的小标签） --- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(14px) saturate(155%);
  backdrop-filter: blur(14px) saturate(155%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-sheen-soft);
  font-size: 13px;
  color: var(--ink-soft);
  transition: transform var(--t-mid) var(--ease-spring),
              background-color var(--t-mid), color var(--t-mid),
              border-color var(--t-mid);
}
.chip:hover {
  transform: translateY(-3px) scale(1.03);
  background: var(--glass-bg-hi);
  border-color: var(--glass-border-hi);
  color: var(--ink);
}

/* 卡片网格 */
.grid { display: grid; gap: 18px; }
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--auto {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ============================================================
   技能条
   ============================================================ */

.skills { display: grid; gap: 20px; }
.skill__top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
  font-size: 14.5px;
}
.skill__name { color: var(--ink); font-weight: 550; }
.skill__lv { font-family: var(--font-mono); font-size: 12.5px; color: var(--accent); }
.skill__track {
  height: 7px;
  border-radius: var(--radius-pill);
  background: var(--glass-bg-lo);
  border: 1px solid var(--hairline-soft);
  overflow: hidden;
}
.skill__fill {
  height: 100%;
  width: 0;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 14px -2px var(--accent-glow);
  transition: width 1.25s var(--ease-out);
}
.skill__fill::after {
  /* 一道扫过进度条的光，让它不至于太"死" */
  content: '';
  display: block;
  height: 100%;
  width: 40%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .5), transparent);
  animation: bar-shine 2.6s ease-in-out infinite;
}
@keyframes bar-shine {
  0%   { transform: translateX(-120%); }
  100% { transform: translateX(320%); }
}

/* ============================================================
   信息表 / 时间线
   ============================================================ */

.facts { display: grid; gap: 0; }
.facts__row {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 11px 0;
  border-bottom: 1px solid var(--hairline-soft);
  font-size: 14.5px;
}
.facts__row:last-child { border-bottom: 0; }
.facts__k { color: var(--ink-dim); }
.facts__v { color: var(--ink); text-align: right; }

/* ============================================================
   页脚
   ============================================================ */

.foot {
  padding: 54px 0 40px;
  border-top: 1px solid var(--hairline);
  margin-top: 40px;
}
.foot__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  color: var(--ink-faint);
  font-size: 13.5px;
}
.foot__star {
  display: inline-block;
  color: var(--accent);
  animation: star-spin 14s linear infinite;
}
@keyframes star-spin { to { transform: rotate(360deg); } }

/* ============================================================
   Toast
   ============================================================ */

.toast-host {
  position: fixed;
  left: 50%;
  /* 右下角那个悬浮按钮占 54px + 26px 边距 = 底部 80px。
     Toast 必须整个抬到它上面，否则两者会在同一高度上叠住。 */
  bottom: 96px;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
  pointer-events: none;
}
.toast {
  padding: 11px 20px;
  border-radius: var(--radius-pill);
  background: var(--glass-bg-hi);
  -webkit-backdrop-filter: blur(20px) saturate(170%);
  backdrop-filter: blur(20px) saturate(170%);
  border: 1px solid var(--glass-border-hi);
  box-shadow: var(--glass-shadow-hi), var(--glass-sheen);
  color: var(--ink);
  font-size: 14px;
  opacity: 0;
  transform: translateY(12px) scale(.96);
  transition: opacity var(--t-mid) var(--ease-out),
              transform var(--t-mid) var(--ease-spring);
  white-space: nowrap;
}
.toast.in { opacity: 1; transform: none; }

/* ============================================================
   主题切换按钮（右下角悬浮）
   ============================================================
   没有顶部导航栏，所以这个按钮是唯一的常驻控件 ——
   固定右下角、加大到 54px（拇指够得到），并抬离边缘一点。
   z-index 要高于内容，但要低于 Toast（200）。 */

.theme-btn {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 120;
  width: 54px; height: 54px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--glass-border-hi);
  background: var(--glass-bg-hi);
  -webkit-backdrop-filter: blur(18px) saturate(165%);
  backdrop-filter: blur(18px) saturate(165%);
  box-shadow: var(--glass-shadow-hi), var(--glass-sheen);
  color: var(--ink-soft);
  cursor: pointer;
  padding: 0;
  /* 按钮本身也带一层极光描边，和头像环呼应 */
  transition: transform var(--t-mid) var(--ease-spring),
              background-color var(--t-mid), color var(--t-mid),
              border-color var(--t-mid), box-shadow var(--t-mid);
}
/* 进页面时从下方轻轻浮出来 */
.theme-btn {
  animation: fab-in .7s var(--ease-spring) .55s both;
}
@keyframes fab-in {
  from { opacity: 0; transform: translateY(18px) scale(.85); }
  to   { opacity: 1; transform: none; }
}
.theme-btn:hover {
  transform: translateY(-3px) rotate(18deg);
  background: var(--glass-bg-hi);
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--glass-shadow-hi), var(--glass-sheen),
              0 0 0 5px color-mix(in srgb, var(--accent) 14%, transparent);
}
.theme-btn:active { transform: translateY(-1px) scale(.94); }
/* 键盘焦点要看得见 */
.theme-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.theme-btn svg { width: 22px; height: 22px; }
/* 日/月两个图标叠放，按主题交叉显隐 */
.theme-btn .ic-sun,
.theme-btn .ic-moon {
  grid-area: 1 / 1;
  transition: opacity var(--t-mid) var(--ease-out),
              transform var(--t-mid) var(--ease-out);
}
.theme-btn .ic-moon { opacity: 0; transform: rotate(-90deg) scale(.6); }
:root[data-theme="light"] .theme-btn .ic-sun { opacity: 0; transform: rotate(90deg) scale(.6); }
:root[data-theme="light"] .theme-btn .ic-moon { opacity: 1; transform: none; }

/* ============================================================
   响应式
   ============================================================ */

@media (max-width: 1000px) {
  .grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 880px) {
  .hero__grid {
    grid-template-columns: 1fr;
    gap: 34px;
    justify-items: center;
    text-align: center;
  }
  .hero__tagline { margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }
  .hero__avatar { width: 178px; height: 178px; }
  .block { padding: 58px 0; }
}

/* 单列之后 2/3 列网格就该塌成一列。
   1000px 那条规则会把它们改成两列，那是为"窄桌面"准备的，
   平板竖屏（768）套上去就会出现两个挤在一起的窄卡片。 */
@media (max-width: 700px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  body { font-size: 15px; }
  .wrap { padding: 0 18px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .hero__avatar { width: 150px; height: 150px; }
  .hero__hint { display: none; }
  .card { padding: 21px; }
  .block { padding: 56px 0; }
  .foot__inner { justify-content: center; text-align: center; }
  /* 悬浮按钮在窄屏上略收一点，但保持 ≥44px 的可点面积 */
  .theme-btn { width: 50px; height: 50px; right: 18px; bottom: 18px; }
  .toast { font-size: 13px; padding: 10px 16px; }
  .toast-host { bottom: 82px; }
}

/* 小屏手机（320px 级别）。
   上面 1000px 那条规则会在单列网格里留下两列，320px 下必然溢出，
   这里按单列重新收紧一次。 */
@media (max-width: 400px) {
  .wrap { padding: 0 15px; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .card { padding: 18px; }
  .card--expand__head { gap: 11px; }
  .hero__avatar { width: 136px; height: 136px; }
  .hero__badge { font-size: 11.5px; padding: 5px 11px; }
  .btn { padding: 10px 15px; font-size: 14px; }
  .chip { font-size: 12.5px; padding: 6px 12px; }
  .facts__row { gap: 10px; }
  .facts__v { font-size: 14px; }
  .theme-btn { width: 46px; height: 46px; right: 14px; bottom: 14px; }
  .toast-host { bottom: 72px; }
}

/* ============================================================
   打印
   ============================================================ */

@media print {
  #starfield3d, .aurora, .grain, .theme-btn, .hero__hint, .hero__avatar-ring {
    display: none !important;
  }
  body { background: #fff; color: #000; }
  .glass, .card {
    background: #fff !important;
    border: 1px solid #ccc !important;
    box-shadow: none !important;
    -webkit-backdrop-filter: none !important;
    backdrop-filter: none !important;
  }
  .block { padding: 22px 0; page-break-inside: avoid; }
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ============================================================
   最近在听 · 曲目列表与播放器
   —— 用原生 <audio>，没有引入任何库。
   列表项 .track 是 flex 行，播放时加 .is-playing 高亮。
   ============================================================ */

.tracks {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.track {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 14px;
  border-radius: var(--radius-sm, 12px);
  border: 1px solid transparent;
  transition: background var(--t-fast, .18s) var(--ease-out),
              border-color var(--t-fast, .18s) var(--ease-out),
              transform var(--t-fast, .18s) var(--ease-out);
}

.track:hover {
  background: var(--glass-bg-lo, rgba(255,255,255,.04));
  border-color: var(--hairline, rgba(255,255,255,.08));
  transform: translateX(3px);
}

.track.is-playing {
  background: var(--glass-bg-hi, rgba(255,255,255,.07));
  border-color: var(--accent, #9adfea);
}

/* 圆形播放按钮 —— 现在里面包着专辑封面缩略图。
   平时只看到封面；鼠标移上去才浮出播放图标，
   正在播放时图标常驻（暂停键要一直可见才好按）。 */
.track__play {
  flex: 0 0 auto;
  width: 48px; height: 48px;
  position: relative;
  display: block;
  padding: 0;
  border-radius: 10px;
  border: 1px solid var(--hairline, rgba(255,255,255,.12));
  background: var(--glass-bg-lo, rgba(255,255,255,.05));
  color: #fff;
  cursor: pointer;
  overflow: hidden;
  transition: border-color var(--t-fast, .18s) var(--ease-out),
              transform var(--t-fast, .18s) var(--ease-spring),
              box-shadow var(--t-fast, .18s) var(--ease-out);
}

.track__cover {
  width: 100%; height: 100%;
  display: block;
  object-fit: cover;
  border-radius: inherit;
}

/* 图标层：盖在封面上的一层半透明遮罩 */
.track__ic {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: inherit;
  background: rgba(0, 0, 0, .5);
  opacity: 0;
  transition: opacity var(--t-fast, .18s) var(--ease-out);
}

.track:hover .track__play,
.track__play:focus-visible {
  border-color: var(--accent, #9adfea);
  transform: scale(1.06);
  box-shadow: 0 4px 18px -4px var(--accent-glow, rgba(154,223,234,.5));
}

.track:hover .track__ic,
.track__play:focus-visible .track__ic { opacity: 1; }

.track__play:focus-visible {
  outline: 2px solid var(--accent, #9adfea);
  outline-offset: 2px;
}

.track__ic svg { width: 18px; height: 18px; }
.track__ic .ic-pause { display: none; }
.track.is-playing .track__ic .ic-play { display: none; }
.track.is-playing .track__ic .ic-pause { display: block; }
.track.is-playing .track__play {
  border-color: var(--accent, #9adfea);
}
/* 播放中图标常驻，并给封面加一圈呼吸光 */
.track.is-playing .track__ic { opacity: 1; }
.track.is-playing .track__play {
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent, #9adfea) 55%, transparent);
}

.track__meta {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.track__name {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ink, #eaf0ff);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track__artist {
  font-size: 12.5px;
  color: var(--ink-dim, #9fb0cc);
}

.track__tag {
  flex: 0 0 auto;
  font-size: 11.5px;
  padding: 3px 9px;
  border-radius: var(--radius-pill, 999px);
  border: 1px solid var(--hairline-soft, rgba(255,255,255,.08));
  color: var(--ink-faint, #7b8aa6);
  white-space: nowrap;
}

/* 没有音频文件的曲目：整条降饱和，按钮禁用态 */
.track__tag--soon {
  border-style: dashed;
  opacity: .8;
}

.track.is-disabled {
  opacity: .5;
  cursor: not-allowed;
}

.track.is-disabled:hover {
  transform: none;
  background: transparent;
  border-color: transparent;
}

.track.is-disabled .track__play { cursor: not-allowed; }

/* ---- 底部播放条 ---- */

.player {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--hairline-soft, rgba(255,255,255,.08));
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.player[hidden] { display: none; }

.player__cover {
  flex: 0 0 auto;
  width: 40px; height: 40px;
  border-radius: 8px;
  object-fit: cover;
  border: 1px solid var(--hairline-soft, rgba(255,255,255,.08));
}

.player__cover[src=""] { display: none; }

.player__now {
  display: flex;
  flex-direction: column;
  gap: 1px;
  min-width: 132px;
  flex: 0 1 auto;
}

.player__title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink, #eaf0ff);
}

.player__artist {
  font-size: 12px;
  color: var(--ink-dim, #9fb0cc);
}

.player__bar {
  flex: 1 1 220px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.player__time {
  font-family: var(--font-mono, monospace);
  font-size: 11.5px;
  color: var(--ink-faint, #7b8aa6);
  flex: 0 0 auto;
  font-variant-numeric: tabular-nums;
}

.player__track {
  flex: 1 1 auto;
  height: 6px;
  border-radius: 999px;
  background: var(--hairline-soft, rgba(255,255,255,.1));
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.player__track:focus-visible {
  outline: 2px solid var(--accent, #9adfea);
  outline-offset: 3px;
}

.player__fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent, #9adfea), var(--accent-2, #8a7df0));
  transition: width .1s linear;
}

.player__stop {
  flex: 0 0 auto;
  width: 30px; height: 30px;
  display: grid; place-items: center;
  border-radius: 50%;
  border: 1px solid var(--hairline, rgba(255,255,255,.12));
  background: transparent;
  color: var(--ink-dim, #9fb0cc);
  cursor: pointer;
  transition: color var(--t-fast, .18s), border-color var(--t-fast, .18s);
}

.player__stop:hover {
  color: var(--ink, #eaf0ff);
  border-color: var(--accent, #9adfea);
}

/* 窄屏：曲目标签让位，播放条换行 */
@media (max-width: 560px) {
  .track__tag { display: none; }
  .player__now { min-width: 0; }
}

/* ============================================================
   reduced-motion：只留静态呈现
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
  .aurora__band { animation: none; }
  .hero__avatar-ring { animation: none; opacity: .55; }
  .hero__name { animation: none; }
  .skill__fill { transition: none; }
  .skill__fill::after { animation: none; display: none; }
  .hero__badge i { animation: none; }
  .foot__star { animation: none; }
  .card--tilt { transform: none !important; }
  .card--sheen::before { display: none; }
  .track { transition: none; }
  .track:hover { transform: none; }
  .track__play { transition: none; }
  .track__play:hover { transform: none; }
  .player__fill { transition: none; }
}