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

/* 去掉页面滚动条外观（保留滚动能力）；超高卡时页面才需要滚动 */
html {
  scrollbar-width: none;
  -ms-overflow-style: none;
}
html::-webkit-scrollbar {
  display: none;
}
body {
  scrollbar-width: none;
}

html, body {
  overflow-x: hidden;
  overscroll-behavior-y: none;   /* 去掉边缘橡皮筋回弹 */
}

:root {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --accent: #38bdf8;
  --border: #334155;
  --overlay: rgba(15, 23, 42, 0.32);
  --bg-x: 0px;   /* 背景壁纸视差偏移（由 JS 跟随光标更新） */
  --bg-y: 0px;
}

/* 白天模式配色覆盖 */
body.light {
  --bg: #eef2f7;
  --card: #ffffff;
  --text: #0f172a;
  --muted: #52647a;
  --accent: #0284c7;
  --border: #dbe2ec;
  --overlay: rgba(255, 255, 255, 0.22);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg); /* 兜底色 */
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  position: relative;
  transition: background 0.3s ease, color 0.3s ease;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* 背景图层：background.jpg 铺满全屏；随光标做轻微视差移动（放大一点避免移动露边） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: url("background.jpg");
  background-size: cover;
  background-position: center;
  transform: translate3d(var(--bg-x), var(--bg-y), 0) scale(1.05);
  will-change: transform;
}

/* 模糊遮罩层：半透明 + 模糊，让内容更清晰可读 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: var(--overlay);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: background 0.3s ease;
}

/* 右上角主题切换按钮 */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 50;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: rgba(128, 128, 128, 0.25);
  color: var(--text);
  font-size: 1.15rem;
  cursor: pointer;
  backdrop-filter: blur(6px);
  transition: all 0.2s;
}

.theme-toggle:hover {
  border-color: var(--accent);
  transform: scale(1.05);
}

/* 整站加载动画：全屏遮罩层（粒子名字画布在其上） */
.site-loader {
  position: fixed;
  inset: 0;
  z-index: 100000;
  pointer-events: none;
}

/* 四块背景：各占视口一角，覆盖整屏（上下都从上往下的 top 定位，避免 bottom 与移动端动态视口落差） */
.site-loader .loader-panel {
  position: absolute;
  width: 52%;
  height: 51%;
  background: var(--bg);
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-loader .loader-panel.tl { left: 0; top: 0; }
.site-loader .loader-panel.tr { right: 0; top: 0; }
.site-loader .loader-panel.bl { left: 0; top: 50%; }
.site-loader .loader-panel.br { right: 0; top: 50%; }

/* 初始：四块从四角外（散开）开始，等待并拢 */
.site-loader .loader-panel.tl { transform: translate(-60vw, -60vh) scale(1.4); }
.site-loader .loader-panel.tr { transform: translate(60vw, -60vh) scale(1.4); }
.site-loader .loader-panel.bl { transform: translate(-60vw, 60vh) scale(1.4); }
.site-loader .loader-panel.br { transform: translate(60vw, 60vh) scale(1.4); }

/* 入场：四块向中间并拢，拼成整屏 */
.site-loader.loader-enter .loader-panel.tl,
.site-loader.loader-enter .loader-panel.tr,
.site-loader.loader-enter .loader-panel.bl,
.site-loader.loader-enter .loader-panel.br {
  transform: translate(0, 0) scale(1);
}

/* 首次加载（非刷新）：直接显示已合拢整屏，不播并拢动画 */
.site-loader.loader-skip .loader-panel.tl,
.site-loader.loader-skip .loader-panel.tr,
.site-loader.loader-skip .loader-panel.bl,
.site-loader.loader-skip .loader-panel.br {
  transform: translate(0, 0) scale(1);
  transition: none;
}

/* 加载完成：四块向四角散开、放大滑出视口（这里重新启用过渡，保证散开有动画） */
.site-loader.loader-hidden .loader-panel.tl,
.site-loader.loader-hidden .loader-panel.tr,
.site-loader.loader-hidden .loader-panel.bl,
.site-loader.loader-hidden .loader-panel.br {
  transition: transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-loader.loader-hidden .loader-panel.tl { transform: translate(-60vw, -60vh) scale(1.4); }
.site-loader.loader-hidden .loader-panel.tr { transform: translate(60vw, -60vh) scale(1.4); }
.site-loader.loader-hidden .loader-panel.bl { transform: translate(-60vw, 60vh) scale(1.4); }
.site-loader.loader-hidden .loader-panel.br { transform: translate(60vw, 60vh) scale(1.4); }

.site-loader.loader-hidden {
  pointer-events: none;
}

/* Q版挂件：右下角常驻 */
.mascot {
  position: fixed;
  right: 4px;
  bottom: 4px;
  width: 150px;
  height: 150px;
  z-index: 40;
  cursor: grab;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  transform-origin: 50% 100%;
  transition: transform 0.25s ease;
}

.mascot img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  -webkit-user-drag: none;
}

.mascot.dragging {
  cursor: grabbing;
  transition: none;
}

/* 按压：下边缘固定，横向微微扩展 + 上下压缩 */
.mascot.squeezed {
  transform: scaleX(1.1) scaleY(0.82);
  transition: transform 0.12s ease;
}

/* 点击挂件弹出的对话气泡（复刻小鲸鱼 SVG 气泡，蓝粉渐变） */
.qm-bubble {
  position: fixed;
  left: 0;
  bottom: 0;
  --dshw-base: 260px;
  --dshw-u: calc(var(--dshw-base) / 1026);
  width: var(--dshw-base);
  aspect-ratio: 1026 / 700;
  transform: translateY(8px) scale(0.9);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 50;
}

.qm-bubble svg {
  display: block;
  width: 100%;
  height: 100%;
}

.qm-bubble .qmb-shape,
.qm-bubble .qmb-t1,
.qm-bubble .qmb-t2 {
  opacity: 0;
  transform: scale(0.7);
  transform-box: fill-box;
  transform-origin: 50% 50%;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.qm-bubble.qm-open .qmb-shape,
.qm-bubble.qm-open .qmb-t1,
.qm-bubble.qm-open .qmb-t2,
.qm-bubble.qm-open .qm-bubble-text {
  opacity: 1;
  transform: none;
  transition: opacity 0.16s ease 0.36s;
}

.qm-bubble-text.qm-single {
  left: calc(20% + 0.5em);
  font-size: calc(var(--dshw-u) * 104);
}

.qm-bubble.qm-open .qmb-shape,
.qm-bubble.qm-open .qmb-t1,
.qm-bubble.qm-open .qmb-t2 {
  transform: none;
}

.qm-bubble.qm-open .qmb-t2 { transition-delay: 0s; }
.qm-bubble.qm-open .qmb-t1 { transition-delay: 0.13s; }
.qm-bubble.qm-open .qmb-shape { transition-delay: 0.26s; }
.qm-bubble .qmb-shape { transition-delay: 0.1s; }
.qm-bubble .qmb-t1 { transition-delay: 0.2s; }
.qm-bubble .qmb-t2 { transition-delay: 0.3s; }

.qm-bubble-text {
  position: absolute;
  left: 20%;
  top: 24%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: #2f4186;
  font-size: calc(var(--dshw-u) * 76);
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.25;
  white-space: normal;
  max-width: calc(var(--dshw-u) * 540);
  opacity: 0;
  transition: opacity 0.16s ease;
}

/* 气泡消失时：文字提前淡出（0.5s 后壳再消失） */
.qm-bubble.qm-open .qm-bubble-text.qmb-text-out {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.qm-bubble.qm-open {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  cursor: pointer;
}

@media (max-width: 640px) {
  /* 头像/主页挂件缩小 */
  .mascot {
    width: 100px;
    height: 100px;
    right: 4px;
    bottom: 4px;
  }
  /* 气泡整体缩小：--dshw-base 同步缩放，文字/字号/最大宽度随 --dshw-u 等比缩放 */
  .qm-bubble {
    --dshw-base: 200px;
    width: var(--dshw-base);
  }
}

.hero {
  text-align: center;
  padding: 3rem 1.5rem 2.5rem;
}

.avatar-wrap {
  width: 180px;
  height: 180px;
  margin: 0 auto 0.9rem;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--accent);
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.35);
  position: relative;
}

.avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

/* 头像：光标悬停时旋转 360° */
.avatar-wrap:hover .avatar {
  transform: rotate(360deg);
}

.avatar-fallback {
  display: none;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
  font-size: 4.2rem;
  font-weight: 700;
  color: #0f172a;
  background: linear-gradient(135deg, #38bdf8, #818cf8);
}

.name {
  position: relative;
  font-size: clamp(2.4rem, 5.5vw, 3.2rem);
  font-weight: 800;
  letter-spacing: 0.5px;
}

/* 名字粒子画布：全屏、固定、不拦截鼠标（承载中央大名字→页面名字的转场） */
.name-canvas {
  position: fixed;
  inset: 0;
  z-index: 100001;
  pointer-events: none;
}

/* 窄屏：字号放大并禁止换行，让长名称完整居中装下 */
@media (max-width: 640px) {
  .name {
    font-size: clamp(2rem, 8.5vw, 2.8rem);
    white-space: nowrap;
  }
}

.tagline {
  color: var(--accent);
  font-size: clamp(0.95rem, 2.6vw, 1.3rem);
  margin-top: 0.3rem;
  font-weight: 700;
}

.intro {
  max-width: 560px;
  margin: 0.6rem auto 0;
  color: var(--muted);
  font-size: clamp(0.85rem, 2.4vw, 1.1rem);
}

.social {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1.2rem;
}

.social a,
.social button.social-btn {
  color: var(--text);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 0.45rem 1.1rem;
  border-radius: 999px;
  font-size: 0.9rem;
  transition: all 0.2s;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
}

.social a:hover,
.social button.social-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.section {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
  display: grid;
  gap: 1.4rem;
}

/* ===== 磨砂玻璃卡片：半透明渐变底 + 背景模糊 + 高光边 ===== */
.card {
  position: relative;
  background:
    radial-gradient(
      120% 88% at 100% 0%,
      rgba(148, 163, 184, 0.11),
      rgba(148, 163, 184, 0) 55%
    ),
    radial-gradient(
      95% 75% at 0% 100%,
      rgba(100, 116, 139, 0.09),
      rgba(100, 116, 139, 0) 62%
    ),
    linear-gradient(
      158deg,
      rgba(71, 85, 105, 0.12),
      rgba(51, 65, 85, 0.2)
    );
  /* 边框压淡、圆角放大、投影收紧变浅：让轮廓融进背景，不再像贴上去的一块板 */
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 24px;
  padding: 1.6rem 1.8rem;
  /* brightness 往下压 + saturate 略提：暗色模式下靠"压暗背景 + 保留色彩"来立住，
     不加白色叠层，否则会发白成一层雾；saturate 控制在 145% 以内偏蓝灰，不往艳蓝跑 */
  backdrop-filter: blur(20px) saturate(145%) brightness(0.89);
  -webkit-backdrop-filter: blur(20px) saturate(145%) brightness(0.89);
  box-shadow: 0 14px 34px -18px rgba(0, 0, 0, 0.34),
    0 2px 8px rgba(0, 0, 0, 0.12), inset 0 1px 0 rgba(255, 255, 255, 0.14),
    inset 0 -1px 0 rgba(255, 255, 255, 0.04);
  transition: background 0.3s ease, border-color 0.3s ease,
    box-shadow 0.3s ease, transform 0.3s ease;
}

/* 玻璃反光：卡片登场时一道高光扫过 */
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(
    105deg,
    rgba(255, 255, 255, 0) 34%,
    rgba(255, 255, 255, 0.16) 48%,
    rgba(255, 255, 255, 0) 62%
  );
  background-size: 240% 100%;
  background-position: 150% 0;
}

.card.active::after {
  animation: glass-sheen 1.1s cubic-bezier(0.22, 1, 0.36, 1) 0.05s both;
}

@keyframes glass-sheen {
  from {
    opacity: 1;
    background-position: 150% 0;
  }
  to {
    opacity: 0;
    background-position: -60% 0;
  }
}

/* 光标高光：只有边缘亮线，卡内不加任何光晕。
   层由 JS 注入（<span class="card-light">），--mx/--my 是光标在卡内的坐标 */
.card-light {
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
}

/* 边缘亮线：用内描边 mask 挖空中间，只留 1px 边框那一圈 */
.card-light::after {
  content: "";
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: inherit;
  background: radial-gradient(
    240px circle at var(--mx, 50%) var(--my, 0%),
    rgba(186, 230, 253, 0.78),
    rgba(56, 189, 248, 0.32) 38%,
    rgba(56, 189, 248, 0) 72%
  );
  -webkit-mask: linear-gradient(#000, #000) content-box,
    linear-gradient(#000, #000);
  -webkit-mask-composite: xor;
  mask: linear-gradient(#000, #000) content-box, linear-gradient(#000, #000);
  mask-composite: exclude;
}

/* 只在真正支持悬停的设备上亮起（触屏点一下不会闪高光）；翻页中的卡不亮 */
@media (hover: hover) {
  .card.active:hover .card-light {
    opacity: 1;
  }
}

/* 悬停：边框亮起 + 阴影加深 + 轻微上浮（阴影层数与默认保持一致，过渡才平滑） */
.card:hover {
  border-color: rgba(56, 189, 248, 0.34);
  box-shadow: 0 20px 44px -20px rgba(0, 0, 0, 0.42),
    0 3px 10px rgba(0, 0, 0, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.2),
    inset 0 -1px 0 rgba(255, 255, 255, 0.05);
  transform: translateY(-3px);
}

body.light .card {
  background:
    radial-gradient(
      120% 88% at 100% 0%,
      rgba(2, 132, 199, 0.1),
      rgba(2, 132, 199, 0) 58%
    ),
    radial-gradient(
      95% 75% at 0% 100%,
      rgba(99, 102, 241, 0.08),
      rgba(99, 102, 241, 0) 62%
    ),
    linear-gradient(
      158deg,
      rgba(255, 255, 255, 0.62),
      rgba(255, 255, 255, 0.4) 45%,
      rgba(241, 245, 249, 0.36)
    );
  border-color: rgba(255, 255, 255, 0.72);
  box-shadow: 0 14px 34px -18px rgba(15, 23, 42, 0.18),
    0 2px 8px rgba(15, 23, 42, 0.06), inset 0 1px 0 rgba(255, 255, 255, 0.9),
    inset 0 -1px 0 rgba(15, 23, 42, 0.04);
  /* 白天模式反过来：把背景提亮，深色文字才压得住 */
  backdrop-filter: blur(20px) saturate(150%) brightness(1.1);
  -webkit-backdrop-filter: blur(20px) saturate(150%) brightness(1.1);
}

body.light .card-light::after {
  background: radial-gradient(
    240px circle at var(--mx, 50%) var(--my, 0%),
    rgba(2, 132, 199, 0.9),
    rgba(2, 132, 199, 0.35) 40%,
    rgba(2, 132, 199, 0) 72%
  );
}

body.light .card:hover {
  border-color: rgba(2, 132, 199, 0.4);
  box-shadow: 0 20px 44px -20px rgba(15, 23, 42, 0.22),
    0 3px 10px rgba(15, 23, 42, 0.08), inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 -1px 0 rgba(15, 23, 42, 0.05);
}

/* 点击累积环形进度圈 */
/* 向下滑动提示箭头：固定在页面最右侧中间，上下浮动 */
.scroll-hint {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  opacity: 0.85;
  pointer-events: none;
  filter: drop-shadow(0 0 4px rgba(56, 189, 248, 0.3));
}

/* 白天浅背景：提示文字与箭头用深色，保证清晰可见 */
body.light .scroll-hint {
  color: #0f172a;
  filter: drop-shadow(0 0 4px rgba(15, 23, 42, 0.25));
}

.scroll-hint .hint-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.4em;
  line-height: 1.35;
}

/* 字母逐个浮现：从上往下依次淡入 + 上移（较慢循环） */
.scroll-hint .hint-label span {
  opacity: 0;
  transform: translateY(4px);
  animation: hint-char 2.6s ease-in-out infinite;
}

.scroll-hint .hint-label span:nth-child(1) { animation-delay: 0s; }
.scroll-hint .hint-label span:nth-child(2) { animation-delay: 0.25s; }
.scroll-hint .hint-label span:nth-child(3) { animation-delay: 0.5s; }
.scroll-hint .hint-label span:nth-child(4) { animation-delay: 0.75s; }
.scroll-hint .hint-label span:nth-child(5) { animation-delay: 1s; }
.scroll-hint .hint-label span:nth-child(6) { animation-delay: 1.25s; }

@keyframes hint-char {
  0%, 100% { opacity: 0; transform: translateY(4px); }
  25%, 70% { opacity: 1; transform: translateY(0); }
}

.scroll-hint .hint-arrow {
  width: 28px;
  height: 28px;
  color: var(--accent);
}

.scroll-hint .hint-arrow.down {
  animation: hint-down 1.4s ease-in-out infinite;
  margin-top: 2px;
}

@keyframes hint-down {
  0%, 100% { transform: translateY(0); opacity: 0.9; }
  50% { transform: translateY(7px); opacity: 0.4; }
}

.scroll-hint.hidden {
  opacity: 0;
  visibility: hidden;
}

.click-ring {
  position: fixed;
  display: block;
  pointer-events: none;
  z-index: 99999;
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 0 4px rgba(56, 189, 248, 0.2));
  transition: opacity 0.5s ease;
}

.click-ring.show {
  opacity: 0.75;
  visibility: visible;
}

.click-ring.fade {
  opacity: 0;
  visibility: hidden;
}

.click-ring .ring-bg {
  stroke: rgba(128, 128, 128, 0.28);
}

.click-ring .ring-fg {
  stroke: rgba(56, 189, 248, 0.5);
  transition: stroke-dashoffset 0.4s ease, stroke-width 0.2s ease;
}

/* 填满一圈时的脉冲反馈 */
.click-ring.burst .ring-fg {
  stroke-width: 8;
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.6));
}

.card h2 {
  font-size: 1.2rem;
  margin-bottom: 0.8rem;
  color: var(--accent);
  border-left: 3px solid var(--accent);
  padding-left: 0.7rem;
}

/* 方形像素字体（本地 ttf，CSD-Block-Bold） */
@font-face {
  font-family: "CSDBlock";
  src: url("CSDBlockBold.ttf") format("truetype");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* 关于我：粉丝数相遇文案 */
.friends-note {
  margin-top: 0.8rem;
  color: var(--muted);
  font-size: 1.05rem;
}
.friends-note #fanCount {
  position: relative;
  color: var(--accent);
  font-family: "CSDBlock", "PingFang SC", sans-serif;
  font-weight: 700;
  font-size: 2.6rem;
  letter-spacing: 0.25em;
}
/* 粉丝数数字的粒子画布：覆盖在数字上，不拦截鼠标 */
.friends-note #fanCount canvas {
  position: absolute;
  left: 0;
  top: 0;
  pointer-events: none;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tags span {
  background: rgba(56, 189, 248, 0.12);
  color: var(--accent);
  border: 1px solid rgba(56, 189, 248, 0.3);
  padding: 0.3rem 0.85rem;
  border-radius: 999px;
  font-size: 0.85rem;
}

.project {
  margin-bottom: 1rem;
}

.project:last-child {
  margin-bottom: 0;
}

.project h3 {
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.project p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* 开发日志：版本号徽标 + 条目 */
.changelog {
  margin: 0.6rem 0 1rem;
  display: grid;
  gap: 0.35rem;
}

.changelog-title {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
}

.changelog p {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.changelog .ver {
  flex: none;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.82rem;
  border: 1px solid rgba(56, 189, 248, 0.35);
  background: rgba(56, 189, 248, 0.1);
  border-radius: 999px;
  padding: 0.05rem 0.6rem;
  line-height: 1.4;
  white-space: nowrap;
}

.project-img {
  width: 100%;
  max-width: 400px;
  border-radius: 12px;
  margin: 1rem 0 0.6rem;
  display: block;
  border: 1px solid var(--border);
}

/* 演示图下方小字 */
.playlist-note {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 0.4rem;
}

.playlist-note a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

.playlist-note a:hover {
  text-decoration: none;
}

.demo-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 0.4rem;
}

.demo-link {
  display: inline-block;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.4rem 1.15rem;
  border-radius: 999px;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.2s;
}

.demo-link:hover {
  background: var(--accent);
  color: #ffffff;
}

.contact {
  list-style: none;
  margin-top: 0.6rem;
}

.contact li {
  margin-bottom: 0.4rem;
}

.contact a {
  color: var(--accent);
  text-decoration: none;
}

.contact a:hover {
  text-decoration: underline;
}

/* 联系我：QQ/邮箱 点击复制 */
.copy-line {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: var(--accent);
  cursor: pointer;
  text-decoration: none;
}

.copy-line:hover {
  color: var(--accent);
}

/* 页脚：固定在最下方，仅在最后一页显示（由 JS 加 .show 控制） */
.footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 30;
  text-align: center;
  padding: 0.65rem 1rem calc(0.65rem + env(safe-area-inset-bottom));
  color: var(--muted);
  font-size: 0.8rem;
  background: rgba(2, 6, 23, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  opacity: 0;
  visibility: hidden;
  transform: translateY(100%);
  transition: opacity 0.4s ease, transform 0.4s ease, visibility 0.4s ease;
  pointer-events: none;
}
.footer.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}
body.light .footer {
  background: rgba(255, 255, 255, 0.75);
  border-top-color: rgba(15, 23, 42, 0.08);
  color: #475569;
}
body.light .footer a {
  color: #0f172a;
}

.footer a {
  color: var(--text);
  text-decoration: none;
  transition: color 0.2s;
}

.footer a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* 公网安备：警徽图标缩到与页脚文字同高 */
.footer .beian-icon {
  height: 1em;
  width: auto;
  margin-right: 0.3em;
  vertical-align: -0.15em;
}

/* 布局容器：窄屏单列，宽屏双栏 */
.layout {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

/* 宽屏(>=960px)：整体改为单列流，每屏一个内容块 */
@media (min-width: 960px) {
  /* 桌面端：hero 固定左栏，section 固定右栏；滚动范围由 JS 锁定 body 高度，不会滚空 */
  .layout {
    grid-template-columns: 380px minmax(0, 1fr);
    gap: 3rem;
    align-items: start;
    padding-top: 2.5rem;
  }
  .hero {
    text-align: center;
    position: fixed;
    top: 0;
    left: 56px;
    bottom: 0;
    width: 380px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    overflow: visible;
  }
  .hero .avatar-wrap {
    margin: 0 auto 0.9rem;
  }
  .hero .intro {
    margin: 0.6rem auto 0;
  }
  .hero .social {
    justify-content: center;
  }
  /* 右侧：单卡片叠放容器（视口内固定），超高卡片随页面滚动露出底部 */
  .section {
    max-width: none;
    margin: 0;
    padding: 0;
    min-width: 0;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 456px;
    overflow: visible;
  }
  /* 桌面端：未超高卡内容自适应并居中在视口；超高卡从中间出现、随滚动向上露出 */
  .card {
    position: absolute;
    left: 0;
    right: 0;
    top: 50%;
    max-width: 720px;
    margin: 0 auto;
    box-sizing: border-box;
    transform-origin: center center;
    transform: perspective(3000px) rotateY(-5deg) translateY(-50%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.62s cubic-bezier(0.16, 1, 0.3, 1),
      opacity 0.5s ease, visibility 0.62s ease;
    will-change: transform, opacity;
  }
  /* 切换方向：正向（下一张）新卡从右翻入、旧卡向左翻出；反向（上一张）左右镜像 */
  .section {
    --in-x: 62px;
    --out-x: -50px;
    --in-ry: 48deg;
    --out-ry: -42deg;
  }
  .section.rev {
    --in-x: -62px;
    --out-x: 50px;
    --in-ry: -48deg;
    --out-ry: 42deg;
  }
  /* 当前展示的卡片 */
  .card.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: perspective(3000px) rotateY(-5deg) translateY(-50%) scale(1);
  }
  /* 新卡片起始位姿：更远、更斜、略低，翻正的同时靠近并归位 */
  .card.entering {
    transform: perspective(1500px) translateZ(-150px) rotateY(var(--in-ry))
      translateX(var(--in-x)) translateY(calc(-50% + 12px)) scale(0.94);
    opacity: 0;
  }
  /* 旧卡片：反向斜翻 + 缩小淡出，比进场更快，减少两张卡重叠时间 */
  .card.leaving {
    transform: perspective(1500px) translateZ(-90px) rotateY(var(--out-ry))
      translateX(var(--out-x)) translateY(-50%) scale(0.94);
    opacity: 0;
    transition: transform 0.42s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.34s ease,
      visibility 0.42s ease;
  }
  /* 关键：起始位姿必须"瞬移"到位，不能从上一状态过渡过去（否则会有回弹抖动） */
  .card.entering,
  .card.tall.entering {
    transition: none;
  }
  .card:hover {
    transform: perspective(3000px) rotateY(-1.5deg) translateY(-50%) scale(1.01);
  }

  /* 超高卡片：顶部从视口中间出现（不居中），随滚动向上露出完整内容 */
  .card.tall,
  .card.tall.active {
    transform: perspective(3000px) rotateY(-5deg) scale(1);
  }
  .card.tall.entering {
    transform: perspective(1500px) translateZ(-150px) rotateY(var(--in-ry))
      translateX(var(--in-x)) scale(0.94);
  }
  .card.tall.leaving {
    transform: perspective(1500px) translateZ(-90px) rotateY(var(--out-ry))
      translateX(var(--out-x)) scale(0.94);
  }
  .card.tall:hover {
    transform: perspective(3000px) rotateY(-1.5deg) scale(1.01);
  }
}

/* ===== 移动端整屏轮播：hero 为第 0 页，每张卡片各占一页，滚动切换、翻转进入、静止不倾斜 ===== */
@media (max-width: 959px) {
  /* hero：全屏居中一页（第 0 页） */
  .hero {
    position: fixed;
    inset: 0;
    padding: 0 1.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    box-sizing: border-box;
    overflow: hidden;
    transition: opacity 0.45s ease, visibility 0.6s ease;
  }
  .hero.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }

  /* section：全屏容器，卡片在其中叠放；overflow 保持可见，超高卡由滚动露出 */
  .section {
    position: fixed;
    inset: 0;
    padding: 0;
    margin: 0;
    max-width: none;
    display: block;
    overflow: visible;
    transition: opacity 0.45s ease, visibility 0.6s ease;
  }
  .section.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
  }

  /* 卡片：整页叠放；普通卡垂直居中，静止态不倾斜（无 rotateY） */
  .card {
    position: absolute;
    left: 1.5rem;
    right: 1.5rem;
    top: 50%;
    max-width: 560px;
    margin: 0 auto;
    box-sizing: border-box;
    transform-origin: center center;
    transform: translateY(-50%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.62s cubic-bezier(0.16, 1, 0.3, 1),
      opacity 0.5s ease, visibility 0.62s ease;
    will-change: transform, opacity;
    /* 移动端模糊半径收一点，保证翻转动画不掉帧；背景更亮，brightness 压得更低 */
    backdrop-filter: blur(14px) saturate(150%) brightness(0.82);
    -webkit-backdrop-filter: blur(14px) saturate(150%) brightness(0.82);
  }
  /* 切换方向：往回滑时翻转方向镜像，手感与手势一致 */
  .section {
    --in-ry: -95deg;
    --out-ry: 95deg;
  }
  .section.rev {
    --in-ry: 95deg;
    --out-ry: -95deg;
  }
  .card.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(-50%) scale(1);
  }
  /* 翻转动态：起始位姿瞬移到位，再从卡片边缘翻正，落位后保持平整 */
  .card.entering {
    transform: perspective(1600px) rotateY(var(--in-ry)) translateY(-50%) scale(0.9);
    opacity: 0;
  }
  .card.leaving {
    transform: perspective(1600px) rotateY(var(--out-ry)) translateY(-50%) scale(0.9);
    opacity: 0;
    transition: transform 0.42s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.34s ease,
      visibility 0.42s ease;
  }
  /* 关键：起始位姿必须"瞬移"到位，不能从上一状态过渡过去（否则会先抖一下） */
  .card.entering,
  .card.tall.entering {
    transition: none;
  }

  /* 超高卡：不居中、不倾斜，top 由 JS 控制（起始在视口 0.22，随滚动向上露出） */
  .card.tall,
  .card.tall.active {
    transform: scale(1);
  }
  .card.tall.entering {
    transform: perspective(1600px) rotateY(var(--in-ry)) scale(0.9);
  }
  .card.tall.leaving {
    transform: perspective(1600px) rotateY(var(--out-ry)) scale(0.9);
  }

  /* 悬停：普通卡保持垂直居中，超高卡保持平整（避免translateY(-3px)破坏居中） */
  .card:hover {
    transform: translateY(-50%) scale(1.01);
  }
  .card.tall:hover {
    transform: scale(1.01);
  }

  /* 名字粒子画布：非 hero 页隐藏，避免盖在卡片上 */
  .name-canvas {
    transition: opacity 0.45s ease, visibility 0.6s ease;
  }
  .name-canvas.hidden {
    opacity: 0;
    visibility: hidden;
  }

  /* 移动端：向下滚动箭头移到窗口底部居中，SCROLL 文字横排 */
  .scroll-hint {
    top: auto;
    left: 0;
    right: 0;
    bottom: 16px;
    transform: none;
  }
  .scroll-hint .hint-label {
    flex-direction: row;
    gap: 0.15em;
  }
}

/* 系统开启"减少动态效果"：卡片直接切换，不做翻转与反光 */
@media (prefers-reduced-motion: reduce) {
  .card {
    transition-duration: 0.01ms !important;
  }
  .card.active::after {
    animation: none;
  }
}