/* ===========================
   残无殇 · 个人主页
   浅色玻璃拟态 / 立体 / 科技
   主题：blue（默认）/ purple
   =========================== */

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

/* ---------- 主题：浅蓝（默认） ---------- */
:root,
:root[data-theme="blue"] {
  --bg-0: #f4f7fd;
  --bg-1: #eaf1fc;
  --bg-2: #e2ecfb;
  --surface-solid: #ffffff;

  --text: #16233d;
  --text-dim: #5a6b8c;
  --text-muted: #93a1ba;

  --accent-rgb: 47, 127, 240;
  --accent-2-rgb: 122, 170, 255;
  --accent-3-rgb: 14, 165, 200;
  --accent: rgb(var(--accent-rgb));
  --accent-2: rgb(var(--accent-2-rgb));
  --accent-3: rgb(var(--accent-3-rgb));
  --accent-warm: #f97316;

  --border: rgba(var(--accent-rgb), 0.16);
  --border-strong: rgba(var(--accent-rgb), 0.42);

  --grid-line: rgba(var(--accent-rgb), 0.09);
  --glow-1: rgba(var(--accent-rgb), 0.3);
  --glow-2: rgba(var(--accent-2-rgb), 0.26);
  --glow-3: rgba(var(--accent-3-rgb), 0.16);

  --grid-opacity: 0.9;
  --glow-opacity: 0.75;
  --particle-opacity: 0.55;

  /* 底部固定区底色（比页面底色更白，保证覆盖力） */
  --footer-rgb: 247, 250, 255;
  /* 阴影/暗部基调，随主题偏冷或偏暖 */
  --ink-rgb: 22, 45, 90;

  --shadow-deep: 0 24px 48px -22px rgba(var(--ink-rgb), 0.22),
    0 8px 20px -12px rgba(var(--accent-rgb), 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);

  --title-glow: rgba(var(--accent-rgb), 0.22);
}

/* ---------- 主题：浅紫 ---------- */
:root[data-theme="purple"] {
  --bg-0: #f8f5fe;
  --bg-1: #f1ecfd;
  --bg-2: #e9e2fb;
  --surface-solid: #ffffff;

  --text: #1f1a3d;
  --text-dim: #635a8c;
  --text-muted: #9a92bd;

  --accent-rgb: 124, 77, 255;
  --accent-2-rgb: 167, 139, 250;
  --accent-3-rgb: 214, 105, 220;
  --accent: rgb(var(--accent-rgb));
  --accent-2: rgb(var(--accent-2-rgb));
  --accent-3: rgb(var(--accent-3-rgb));
  --accent-warm: #f97316;

  --border: rgba(var(--accent-rgb), 0.16);
  --border-strong: rgba(var(--accent-rgb), 0.42);

  --grid-line: rgba(var(--accent-rgb), 0.09);
  --glow-1: rgba(var(--accent-rgb), 0.26);
  --glow-2: rgba(var(--accent-2-rgb), 0.28);
  --glow-3: rgba(var(--accent-3-rgb), 0.16);

  --grid-opacity: 0.9;
  --glow-opacity: 0.7;
  --particle-opacity: 0.5;

  --footer-rgb: 251, 248, 255;
  --ink-rgb: 45, 25, 95;

  --shadow-deep: 0 24px 48px -22px rgba(var(--ink-rgb), 0.2),
    0 8px 20px -12px rgba(var(--accent-rgb), 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);

  --title-glow: rgba(var(--accent-rgb), 0.2);
}

/* 注意：body 绝不能设 height: 100%。一旦锁死成视口高度，
   padding-bottom 就不会产生文档底部空间，滚到底时最后一个卡片
   会直接被 fixed footer 盖住。只给 min-height 让它随内容增长。 */
html {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC",
    "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse 90% 60% at 50% -10%, var(--glow-3), transparent 60%),
    linear-gradient(180deg, var(--bg-0) 0%, var(--bg-1) 55%, var(--bg-2) 100%);
  background-attachment: fixed;
  overflow-x: hidden;
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
  /* 底部留位兜底值（footer 高度 + 白纱渐隐区 + iOS 安全区）
     运行时由 script.js 按 footer 实际高度精确校正 */
  padding-bottom: calc(160px + env(safe-area-inset-bottom, 0px));
  transition: background-color 0.5s ease, color 0.4s ease;
}

/* ===========================
   背景层
   =========================== */
.bg-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.bg-grid {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 0%, transparent 78%);
  opacity: var(--grid-opacity);
}

.bg-glow {
  filter: blur(80px);
  opacity: var(--glow-opacity);
}

.bg-glow-1 {
  background: radial-gradient(circle at 18% 22%, var(--glow-1), transparent 45%);
}

.bg-glow-2 {
  background: radial-gradient(circle at 82% 16%, var(--glow-2), transparent 50%);
}

.bg-glow-3 {
  background: radial-gradient(circle at 50% 92%, var(--glow-3), transparent 55%);
}

.bg-particles {
  z-index: 1;
  opacity: var(--particle-opacity);
}

.bg-scan {
  background: repeating-linear-gradient(
    0deg,
    transparent 0,
    transparent 2px,
    rgba(var(--ink-rgb), 0.014) 2px,
    rgba(var(--ink-rgb), 0.014) 3px
  );
}

/* ===========================
   主题切换器
   =========================== */
.theme-switch {
  position: fixed;
  top: 22px;
  right: 22px;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px;
  border-radius: 999px;
  /* 同为固定元素，底色与 footer 保持一致，跟随主题 */
  background: rgba(var(--footer-rgb), 0.8);
  border: 1px solid var(--border);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  box-shadow: 0 10px 24px -12px rgba(var(--ink-rgb), 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.9);
  transition: background 0.4s, border-color 0.4s;
}

.theme-dot {
  position: relative;
  width: 26px;
  height: 26px;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  padding: 0;
  display: grid;
  place-items: center;
  background: transparent;
  transition: transform 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.theme-dot::before {
  content: "";
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--dot-color);
  box-shadow: 0 2px 6px -1px rgba(0, 0, 0, 0.22),
    inset 0 1px 1px rgba(255, 255, 255, 0.6);
  transition: transform 0.25s;
}

.theme-dot:hover {
  transform: scale(1.14);
}

.theme-dot[aria-pressed="true"] {
  background: rgba(var(--accent-rgb), 0.12);
}

.theme-dot[aria-pressed="true"]::before {
  transform: scale(1.12);
  box-shadow: 0 0 0 2px var(--surface-solid),
    0 0 0 3.5px var(--accent),
    0 4px 10px -2px rgba(var(--accent-rgb), 0.5);
}

.theme-dot[data-theme-name="blue"] {
  --dot-color: linear-gradient(135deg, #4d94ff, #1e63d6);
}

.theme-dot[data-theme-name="purple"] {
  --dot-color: linear-gradient(135deg, #a78bfa, #6d3ff5);
}

.theme-dot:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===========================
   主内容
   =========================== */
.page {
  position: relative;
  z-index: 2;
  flex: 1;
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 64px 36px 56px;
}

/* ===========================
   Hero 头部
   =========================== */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 64px;
  perspective: 1200px;
}

.hero-logo {
  position: relative;
  width: 132px;
  height: 132px;
  display: grid;
  place-items: center;
  margin-bottom: 24px;
  filter: drop-shadow(0 16px 26px rgba(var(--accent-rgb), 0.32))
    drop-shadow(0 4px 8px rgba(var(--ink-rgb), 0.14));
  transform-style: preserve-3d;
  animation: floatY 6s ease-in-out infinite;
}

@keyframes floatY {
  0%, 100% { transform: translateY(0) rotateX(0); }
  50%      { transform: translateY(-8px) rotateX(4deg); }
}

.logo-img {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  object-fit: cover;
  background: var(--surface-solid);
  position: relative;
  z-index: 2;
  box-shadow:
    inset 0 0 0 1px rgba(var(--accent-rgb), 0.18),
    0 12px 26px rgba(var(--ink-rgb), 0.16);
}

.logo-ring {
  position: absolute;
  inset: -6px;
  border-radius: 28px;
  border: 1px solid transparent;
  background:
    linear-gradient(var(--bg-0), var(--bg-0)) padding-box,
    conic-gradient(
      from 0deg,
      rgba(var(--accent-rgb), 0) 0%,
      rgba(var(--accent-rgb), 0.9) 25%,
      rgba(var(--accent-2-rgb), 0.7) 50%,
      rgba(var(--accent-3-rgb), 0.85) 75%,
      rgba(var(--accent-rgb), 0) 100%
    ) border-box;
  -webkit-mask:
    linear-gradient(#000 0 0) padding-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  animation: spin 8s linear infinite;
  opacity: 0.9;
}

.logo-ring-2 {
  inset: -16px;
  border-radius: 36px;
  background:
    linear-gradient(var(--bg-0), var(--bg-0)) padding-box,
    conic-gradient(
      from 180deg,
      rgba(var(--accent-3-rgb), 0) 0%,
      rgba(var(--accent-3-rgb), 0.55) 30%,
      rgba(var(--accent-rgb), 0.55) 70%,
      rgba(var(--accent-3-rgb), 0) 100%
    ) border-box;
  -webkit-mask:
    linear-gradient(#000 0 0) padding-box,
    linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask-composite: exclude;
  animation: spinRev 14s linear infinite;
  opacity: 0.55;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes spinRev {
  to { transform: rotate(-360deg); }
}

.site-title {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 800;
  letter-spacing: 0.08em;
  line-height: 1.1;
  margin-bottom: 16px;
}

.title-text {
  position: relative;
  display: inline-block;
  background: linear-gradient(
    120deg,
    var(--accent) 0%,
    var(--accent-2) 28%,
    rgb(var(--accent-3-rgb)) 52%,
    var(--accent) 76%,
    var(--accent-2) 100%
  );
  background-size: 200% 100%;
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: shine 6s linear infinite;
  filter: drop-shadow(0 6px 18px var(--title-glow));
}

@keyframes shine {
  to { background-position: 200% 0; }
}

.site-subtitle {
  font-size: 14px;
  color: var(--text-dim);
  letter-spacing: 0.16em;
  font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.site-subtitle .bracket {
  color: var(--accent);
  opacity: 0.75;
}

.site-subtitle .typing {
  overflow: hidden;
  white-space: nowrap;
  border-right: 1px solid var(--accent);
  animation: blink 1.2s steps(2) infinite;
}

@keyframes blink {
  50% { border-color: transparent; }
}

/* ===========================
   两栏主体
   =========================== */
.sections {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 32px;
  align-items: stretch; /* 两栏等高 */
}

@media (max-width: 880px) {
  .sections {
    grid-template-columns: 1fr;
  }
}

/* 区头 */
.section {
  background: linear-gradient(
    160deg,
    rgba(255, 255, 255, 0.82) 0%,
    rgba(255, 255, 255, 0.58) 100%
  );
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px 28px 32px;
  backdrop-filter: blur(20px) saturate(150%);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  box-shadow: var(--shadow-deep);
  position: relative;
  overflow: hidden;
  transition: border-color 0.4s, box-shadow 0.4s;
  /* 纵向弹性：内容区自动填满，保证两栏视觉等高 */
  display: flex;
  flex-direction: column;
}

.section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(var(--accent-rgb), 0.55),
    transparent
  );
}

.section-head {
  margin-bottom: 24px;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--border-strong);
  flex-shrink: 0;
}

.section-marker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--text-muted);
  margin-bottom: 10px;
  font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  text-transform: uppercase;
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.dot-own {
  background: var(--accent);
  box-shadow: 0 0 8px rgba(var(--accent-rgb), 0.9),
    0 0 16px rgba(var(--accent-rgb), 0.4);
  animation: pulse 2s ease-in-out infinite;
}

.dot-third {
  background: var(--accent-2);
  box-shadow: 0 0 8px rgba(var(--accent-2-rgb), 0.9),
    0 0 16px rgba(var(--accent-2-rgb), 0.4);
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%      { opacity: 0.5; transform: scale(0.85); }
}

.section-title {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 6px;
}

.section-title .en {
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--text-muted);
  font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-weight: 400;
}

.section-desc {
  font-size: 13px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

/* ===========================
   卡片网格
   =========================== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 22px;
  padding: 2px 2px 20px; /* 给厚度与落地阴影留出空间 */
  flex: 1; /* 卡片行拉伸填满，与右侧空状态等高 */
}

/* 卡片本体：台阶式厚度 + 落地投影 */
.card {
  --mx: 50%;
  --my: 50%;
  position: relative;
  display: block;
  text-decoration: none;
  color: inherit;
  border-radius: 18px;
  background: linear-gradient(
    155deg,
    rgba(255, 255, 255, 0.97) 0%,
    rgba(255, 255, 255, 0.78) 100%
  );
  border: 1px solid var(--border);
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.45s cubic-bezier(0.2, 0.8, 0.2, 1), border-color 0.3s;
  /* 台阶阴影 → 实体厚度感 */
  box-shadow:
    0 1px 0 rgba(var(--accent-rgb), 0.1),
    0 3px 0 -1px rgba(var(--ink-rgb), 0.05),
    0 6px 0 -2px rgba(var(--ink-rgb), 0.045),
    0 9px 0 -4px rgba(var(--ink-rgb), 0.04),
    0 18px 30px -16px rgba(var(--ink-rgb), 0.22),
    0 6px 12px -6px rgba(var(--accent-rgb), 0.16),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 -1px 0 rgba(var(--accent-rgb), 0.06);
  isolation: isolate;
  transform-style: preserve-3d;
  perspective: 900px;
  cursor: pointer;
  will-change: transform;
}

.card:hover {
  border-color: var(--border-strong);
  box-shadow:
    0 2px 0 rgba(var(--accent-rgb), 0.16),
    0 7px 0 -1px rgba(var(--ink-rgb), 0.06),
    0 14px 0 -3px rgba(var(--ink-rgb), 0.055),
    0 22px 0 -7px rgba(var(--ink-rgb), 0.045),
    0 36px 48px -20px rgba(var(--ink-rgb), 0.3),
    0 14px 24px -10px rgba(var(--accent-rgb), 0.36),
    0 0 0 1px rgba(var(--accent-rgb), 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 -1px 0 rgba(var(--accent-rgb), 0.08);
}

/* 落地投影：卡片抬起时收紧、加深 */
.card::after {
  content: "";
  position: absolute;
  left: 14%;
  right: 14%;
  bottom: -16px;
  height: 22px;
  background: radial-gradient(
    ellipse at center,
    rgba(var(--ink-rgb), 0.3) 0%,
    transparent 70%
  );
  filter: blur(9px);
  opacity: 0.45;
  transform: translateZ(-2px);
  transition: opacity 0.45s, transform 0.45s;
  z-index: -2;
  pointer-events: none;
}

.card:hover::after {
  opacity: 0.85;
  transform: translateZ(-2px) scaleX(0.84);
}

/* 边缘氛围光：遮罩挖空中心，保证卡面文字区域干净 */
.card-glow {
  position: absolute;
  inset: -4px;
  border-radius: 22px;
  background: conic-gradient(
    from 120deg,
    transparent 0deg,
    rgba(var(--accent-rgb), 0.85) 90deg,
    rgba(var(--accent-2-rgb), 0.7) 180deg,
    transparent 270deg
  );
  filter: blur(12px);
  opacity: 0;
  transition: opacity 0.4s;
  z-index: -1;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(
    ellipse 118% 118% at 50% 50%,
    transparent 52%,
    #000 100%
  );
          mask-image: radial-gradient(
    ellipse 118% 118% at 50% 50%,
    transparent 52%,
    #000 100%
  );
}

.card:hover .card-glow {
  opacity: 0.75;
}

/* 光效容器：裁圆角，不破坏卡片的 preserve-3d */
.card-face {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

/* 跟随鼠标的彩色光晕 */
.card-halo {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    220px circle at var(--mx) var(--my),
    rgba(var(--accent-rgb), 0.16) 0%,
    rgba(var(--accent-2-rgb), 0.08) 35%,
    transparent 65%
  );
  opacity: 0;
  transition: opacity 0.35s;
}

/* 跟随鼠标的白色镜面高光 */
.card-light {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    190px circle at var(--mx) var(--my),
    rgba(255, 255, 255, 0.9) 0%,
    rgba(255, 255, 255, 0.35) 40%,
    transparent 62%
  );
  opacity: 0;
  transition: opacity 0.35s;
}

.card:hover .card-halo {
  opacity: 1;
}

.card:hover .card-light {
  opacity: 0.7;
}

.card-inner {
  position: relative;
  padding: 22px 20px 20px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  z-index: 2;
  transform-style: preserve-3d;
}

.card-icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  color: var(--accent);
  background: linear-gradient(
    145deg,
    rgba(var(--accent-rgb), 0.2) 0%,
    rgba(var(--accent-2-rgb), 0.08) 100%
  );
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.95),
    inset 0 -2px 5px rgba(var(--accent-rgb), 0.12),
    0 5px 12px -4px rgba(var(--accent-rgb), 0.4);
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.45s;
}

.card:hover .card-icon {
  transform: translateZ(42px);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 1),
    inset 0 -2px 6px rgba(var(--accent-rgb), 0.16),
    0 12px 22px -6px rgba(var(--accent-rgb), 0.5);
}

.card-icon svg {
  width: 23px;
  height: 23px;
}

.card-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  transform-style: preserve-3d;
}

.card-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.card:hover .card-title {
  transform: translateZ(28px);
}

.card-desc {
  font-size: 12.5px;
  color: var(--text-dim);
  line-height: 1.6;
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.card:hover .card-desc {
  transform: translateZ(20px);
}

.card-link {
  margin-top: auto; /* 卡片被拉伸时，链接贴底，内容分布更舒展 */
  padding-top: 2px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 11.5px;
  color: var(--accent-3);
  letter-spacing: 0.04em;
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.card:hover .card-link {
  transform: translateZ(24px);
}

.card-link svg {
  width: 12px;
  height: 12px;
  transition: transform 0.3s;
}

.card:hover .card-link svg {
  transform: translate(2px, -2px);
}

.card-tag {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 9px;
  letter-spacing: 0.22em;
  font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  color: var(--accent);
  padding: 3px 7px;
  border: 1px solid rgba(var(--accent-rgb), 0.38);
  border-radius: 4px;
  background: rgba(var(--accent-rgb), 0.08);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.9),
    0 3px 6px -3px rgba(var(--accent-rgb), 0.4);
  transition: transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.card:hover .card-tag {
  transform: translateZ(34px);
}

.card-shine {
  position: absolute;
  top: 0;
  left: -120%;
  width: 60%;
  height: 100%;
  /* 浅底上白色扫光不可见 → 改用淡彩色光带 */
  background: linear-gradient(
    120deg,
    transparent 0%,
    rgba(var(--accent-rgb), 0.16) 50%,
    transparent 100%
  );
  transform: skewX(-20deg);
  transition: left 0.7s cubic-bezier(0.2, 0.8, 0.2, 1);
  pointer-events: none;
}

.card:hover .card-shine {
  left: 130%;
}

/* ===========================
   三方网页 空状态
   =========================== */
.empty-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px 20px;
  border: 1px dashed var(--border-strong);
  border-radius: 16px;
  /* 内凹：与外凸的入口卡片形成对比 */
  background:
    radial-gradient(
      ellipse at center,
      rgba(var(--accent-2-rgb), 0.12) 0%,
      transparent 70%
    ),
    linear-gradient(180deg, rgba(var(--ink-rgb), 0.035) 0%, rgba(255, 255, 255, 0.5) 100%);
  box-shadow:
    inset 0 2px 6px rgba(var(--ink-rgb), 0.07),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  color: var(--text-dim);
  text-align: center;
  min-height: 220px;
  flex: 1; /* 撑满剩余高度，与左侧卡片区等高 */
}

.empty-icon {
  width: 56px;
  height: 56px;
  color: var(--accent-2);
  opacity: 0.75;
  margin-bottom: 14px;
  animation: floatY 5s ease-in-out infinite;
}

.empty-icon svg {
  width: 100%;
  height: 100%;
}

.empty-text {
  font-size: 14px;
  letter-spacing: 0.12em;
  margin-bottom: 4px;
  color: var(--text);
}

.empty-hint {
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--text-muted);
  font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

/* ===========================
   底部固定 Footer
   =========================== */
.footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10;
  /* 底色走 --footer-rgb，切换主题时底部一起变 */
  background: linear-gradient(
    180deg,
    rgba(var(--footer-rgb), 0.88) 0%,
    rgba(var(--footer-rgb), 0.96) 35%,
    rgba(var(--footer-rgb), 0.99) 100%
  );
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-top: 1px solid var(--border);
  box-shadow: 0 -14px 32px -20px rgba(var(--ink-rgb), 0.28);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  transition: border-color 0.4s, background 0.45s ease;
}

/* footer 上方的渐隐纱：滚动内容平滑消失，不会从底边穿帮 */
.footer::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 100%;
  height: 64px;
  background: linear-gradient(
    180deg,
    rgba(var(--footer-rgb), 0) 0%,
    rgba(var(--footer-rgb), 0.55) 55%,
    rgba(var(--footer-rgb), 0.88) 100%
  );
  pointer-events: none;
  transition: background 0.45s ease;
}

.footer::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(var(--accent-rgb), 0.55),
    rgba(var(--accent-2-rgb), 0.45),
    transparent
  );
}

.footer-inner {
  max-width: 1180px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.footer-line {
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 0.04em;
}

.copy {
  font-family: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 11.5px;
}

/* 备案信息行：ICP + 公安，窄屏自动换行居中 */
.footer-beian {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 4px 10px;
}

.icp-link,
.police-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s;
  font-size: 12px;
  white-space: nowrap;
}

.icp-link:hover,
.police-link:hover {
  color: var(--accent);
}

.icp-shield {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  color: var(--accent-warm);
  filter: drop-shadow(0 0 4px rgba(249, 115, 22, 0.35));
}

/* 公安警徽 */
.police-badge {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  filter: drop-shadow(0 1px 3px rgba(47, 127, 240, 0.45));
}

.beian-sep {
  color: var(--text-muted);
  opacity: 0.45;
  font-size: 11px;
  user-select: none;
}

/* ===========================
   响应式微调
   =========================== */
@media (max-width: 600px) {
  body { padding-bottom: calc(190px + env(safe-area-inset-bottom, 0px)); }
  .page { padding: 40px 18px 32px; }
  .hero { margin-bottom: 40px; }
  .hero-logo { width: 104px; height: 104px; }
  .logo-img { width: 76px; height: 76px; }
  .section { padding: 22px 20px 24px; }
  .section-title { font-size: 18px; }
  .site-subtitle { font-size: 12px; letter-spacing: 0.1em; }
  .theme-switch { top: 14px; right: 14px; padding: 5px; }
  .theme-dot { width: 24px; height: 24px; }
}

/* 尊重系统「减弱动效」设置 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}