/* ============================================================
   MCDRS — Design System v3
   Google Material Design 3 × 官方配色 × 纯合成层动画
   （全程只动画 transform/opacity，无 backdrop-filter、无大模糊滤镜）
   ============================================================ */

:root {
  /* Google 官方色板 */
  --g-blue: #4285f4;
  --g-red: #ea4335;
  --g-yellow: #fbbc04;
  --g-green: #34a853;

  --md-primary: #0b57d0;
  --md-on-primary: #ffffff;
  --md-primary-container: #d3e3fd;
  --md-on-primary-container: #041e49;
  --md-secondary-container: #dbe4f6;
  --md-surface: #ffffff;
  --md-surface-dim: rgba(240, 244, 249, .8);
  --md-surface-container: #f3f6fc;
  --md-surface-container-high: #e9eef6;
  --md-on-surface: #1f1f1f;
  --md-on-surface-variant: #5f6368;
  --md-outline-variant: #dde3ea;
  --md-error: #c5221f;
  --md-success: #188038;

  --grad-a: #4285f4;
  --grad-b: #7c9ef5;
  --grad-c: #a78bdb;
  --glow-opacity: .3;
  --cursor-glow-color: #4285f4;
  --cursor-glow-opacity: .32;
  --spot-color: rgba(66, 133, 244, .12);
  --glass-bg: rgba(255, 255, 255, .2);
  --glass-border: rgba(255, 255, 255, .6);
  --glass-highlight: rgba(255, 255, 255, .85);
  --glass-shadow: 0 10px 30px rgba(31, 41, 55, .18);

  /* 全页固定渐变画布：随滚动缓慢变色 */
  --bg-grad: linear-gradient(
    185deg,
    #fdfdff   0%,
    #eef3fb  16%,
    #eef0fa  34%,
    #f2ecf9  52%,
    #faf0ec  70%,
    #edf6f0  86%,
    #f4f4f8 100%
  );

  --radius-sm: 12px;
  --radius-md: 20px;
  --radius-lg: 28px;
  --radius-full: 999px;

  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ease-emph: cubic-bezier(.2, 0, 0, 1);
  --dur-fast: 160ms;

  --shadow-1: 0 1px 2px rgba(60, 64, 67, .18);
  --shadow-2: 0 1px 3px rgba(60, 64, 67, .15), 0 4px 14px rgba(60, 64, 67, .1);
  --shadow-hover: 0 4px 8px rgba(60, 64, 67, .14), 0 14px 34px rgba(60, 64, 67, .18);

  --container: 1140px;
}

html[data-theme="dark"] {
  --md-primary: #a8c7fa;
  --md-on-primary: #062e6f;
  --md-primary-container: #1f3a5f;
  --md-on-primary-container: #d3e3fd;
  --md-secondary-container: #2b374b;
  --md-surface: #131314;
  --md-surface-dim: rgba(15, 15, 16, .78);
  --md-surface-container: #1b1c1d;
  --md-surface-container-high: #26282a;
  --md-on-surface: #e3e3e3;
  --md-on-surface-variant: #9aa0a6;
  --md-outline-variant: #333537;
  --md-error: #f28b82;
  --md-success: #81c995;

  --grad-a: #8ab4f8;
  --grad-b: #6f9af5;
  --grad-c: #c3a6ff;
  --glow-opacity: .18;
  --cursor-glow-color: #8ab4f8;
  --cursor-glow-opacity: .26;
  --spot-color: rgba(138, 180, 248, .16);
  --glass-bg: rgba(5, 6, 9, .26);
  --glass-border: rgba(255, 255, 255, .14);
  --glass-highlight: rgba(255, 255, 255, .38);
  --glass-shadow: 0 10px 30px rgba(0, 0, 0, .32);

  --bg-grad: linear-gradient(
    185deg,
    #131314   0%,
    #0f141c  16%,
    #12101d  36%,
    #171118  56%,
    #101713  78%,
    #121212 100%
  );

  --shadow-1: 0 1px 2px rgba(0, 0, 0, .5);
  --shadow-2: 0 1px 3px rgba(0, 0, 0, .4), 0 4px 14px rgba(0, 0, 0, .32);
  --shadow-hover: 0 4px 8px rgba(0, 0, 0, .4), 0 14px 34px rgba(0, 0, 0, .5);
}

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

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

body {
  font-family: "Roboto", "Noto Sans SC", -apple-system, BlinkMacSystemFont,
    "Segoe UI", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--md-surface);
  color: var(--md-on-surface);
  line-height: 1.65;
  overflow-x: hidden;
}

/* ── 全页固定渐变背景（不随内容滚动，滚动时仅缓慢平移变色） ── */
.bg-canvas {
  position: fixed;
  inset: 0;
  z-index: -3;
  overflow: hidden;
  pointer-events: none;
}
.bg-canvas__grad {
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 340vh;
  background: var(--bg-grad);
  will-change: transform;
}

/* 环境光晕 —— 静态 radial-gradient，零滤镜零动画 */
body::before,
body::after {
  content: "";
  position: fixed;
  z-index: -1;
  width: 62vmax; height: 62vmax;
  border-radius: 50%;
  pointer-events: none;
  opacity: var(--glow-opacity);
}
body::before {
  top: -28vmax; right: -22vmax;
  background: radial-gradient(closest-side, var(--grad-b), transparent 68%);
}
body::after {
  bottom: -30vmax; left: -24vmax;
  background: radial-gradient(closest-side, var(--grad-c), transparent 68%);
}

::selection { background: var(--md-primary-container); color: var(--md-on-primary-container); }

/* ── 鼠标跟随光晕（挂在渐变画布内：永远在背景上、内容下） ── */
.cursor-glow {
  position: absolute;
  left: 0; top: 0;
  width: 380px; height: 380px;
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  background: radial-gradient(circle closest-side, var(--cursor-glow-color), transparent 68%);
  will-change: transform, opacity;
  transition: opacity .5s ease;
}
.cursor-glow.on { opacity: var(--cursor-glow-opacity); }

/* 磁吸元素受 JS 接管 transform 时，屏蔽 transform 过渡避免叠加 */
.mag-active {
  transition: box-shadow .3s var(--ease-out), border-color .3s ease,
              filter var(--dur-fast) ease !important;
}

.container {
  width: min(var(--container), calc(100% - 48px));
  margin-inline: auto;
}

.icon { width: 18px; height: 18px; fill: currentColor; flex-shrink: 0; }
.icon--sm { width: 15px; height: 15px; }

/* ── Google 字阶 ──────────────────────────────────────────── */
.display {
  font-size: clamp(2.9rem, 7vw, 4.6rem);
  line-height: 1.07;
  font-weight: 700;
  letter-spacing: -.015em;
}
.gradient-text {
  background: linear-gradient(100deg, var(--grad-a), var(--grad-b) 55%, var(--grad-c));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede {
  max-width: 34em;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  color: var(--md-on-surface-variant);
  font-weight: 400;
}
.lede strong { color: var(--md-on-surface); font-weight: 500; }

h2 { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 650; letter-spacing: -.01em; }

.eyebrow {
  font-size: .78rem; font-weight: 700;
  letter-spacing: .18em; text-transform: uppercase;
  color: var(--md-primary);
  margin-bottom: 12px;
}

/* Hero 徽章（Google 圆点 pill） */
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 18px; border-radius: var(--radius-full);
  background: var(--md-secondary-container); color: var(--md-on-surface);
  font-size: .84rem; font-weight: 550; letter-spacing: .14em;
}
.hero-badge__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--g-green);
  animation: pulse 2.2s ease-out infinite;
}

.section-head { text-align: center; margin-bottom: 56px; }
.section-head__desc {
  color: var(--md-on-surface-variant);
  max-width: 32em; margin: 14px auto 0;
}

/* 渐变下划线：随区块入场展开 */
.section-head h2::after {
  content: "";
  display: block;
  width: 68px; height: 4px;
  margin: 20px auto 0;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--g-blue), var(--g-red), var(--g-yellow), var(--g-green));
  transform: scaleX(0);
  transition: transform .7s var(--ease-out) .2s;
}
.section-head.is-visible h2::after { transform: scaleX(1); }

.section { padding: clamp(88px, 11vw, 136px) 0; }

/* ── 按钮（含 Material 水波纹） ───────────────────────────── */
.btn {
  position: relative;
  overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  border: none; cursor: pointer;
  border-radius: var(--radius-full);
  padding: 11px 26px;
  font: inherit; font-size: .95rem; font-weight: 500;
  text-decoration: none; white-space: nowrap;
  transition: transform var(--dur-fast) var(--ease-emph),
              box-shadow var(--dur-fast) var(--ease-emph),
              filter var(--dur-fast) ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-2); }
.btn:active { transform: translateY(0) scale(.95); box-shadow: var(--shadow-1); }
.btn:focus-visible { outline: 3px solid var(--md-primary); outline-offset: 2px; }

.btn--filled { background: var(--md-primary); color: var(--md-on-primary); }
.btn--filled:hover { filter: brightness(1.07); }
.btn--filled:not(.nav__cta):hover { box-shadow: 0 6px 22px rgba(66, 133, 244, .4); }
.btn--tonal { background: var(--md-secondary-container); color: var(--md-on-primary-container); }
.btn--outlined { background: transparent; color: var(--md-primary);
  box-shadow: inset 0 0 0 1.5px var(--md-outline-variant); }
.btn--lg { padding: 15px 34px; font-size: 1rem; }
.btn--sm { padding: 7px 16px; font-size: .85rem; }

.ripple {
  position: absolute;
  border-radius: 50%;
  background: currentColor;
  opacity: .16;
  pointer-events: none;
  animation: ripple .55s var(--ease-out) forwards;
}
@keyframes ripple {
  from { transform: scale(0); opacity: .24; }
  70%  { opacity: .16; }
  to   { transform: scale(1); opacity: 0; }
}

/* ── 顶部滚动进度条（四色流动渐变） ──────────────────────── */
.progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  z-index: 110;
  pointer-events: none;
}
.progress__bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg,
    var(--g-blue), var(--g-red), var(--g-yellow), var(--g-green), var(--g-blue));
  background-size: 220% 100%;
  animation: gradflow 5s linear infinite;
}
@keyframes gradflow {
  from { background-position: 0% 0; }
  to   { background-position: 220% 0; }
}

/* ── 导航（Google 式纯色顶栏，无毛玻璃 → 滚动零开销） ─────── */
.nav {
  position: fixed; inset-inline: 0; top: 0; z-index: 100;
  background: var(--md-surface);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-fast) ease;
}
.nav.is-scrolled { border-bottom-color: var(--md-outline-variant); }

.nav__inner { display: flex; align-items: center; gap: 20px; height: 64px; }

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none;
  color: var(--md-on-surface); font-weight: 700; font-size: 1.15rem; letter-spacing: 0; }
.brand__mark {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 10px;
  background: conic-gradient(from 220deg, var(--g-blue), var(--grad-c), var(--g-blue));
  color: #fff; font-size: 1.05rem; font-weight: 800;
  box-shadow: var(--shadow-1);
}
.brand__mark--sm { width: 28px; height: 28px; border-radius: 8px; font-size: .85rem; }

.nav__links { display: flex; gap: 4px; margin-left: auto; }
.nav__links a {
  padding: 8px 16px; border-radius: var(--radius-full);
  color: var(--md-on-surface-variant); text-decoration: none;
  font-size: .92rem; font-weight: 500;
  transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease;
}
.nav__links a:hover { color: var(--md-primary); background: var(--md-secondary-container); }

.nav__cta { margin-left: 4px; }

/* ── Hero 漂浮方块装饰（纯 transform 动画） ───────────────── */
.hero { position: relative; padding-top: clamp(140px, 17vw, 190px); overflow: hidden; }

.hero-decor { position: absolute; inset: 0; pointer-events: none; }
.hero-decor i {
  position: absolute;
  border-radius: 22%;
  background: linear-gradient(135deg, var(--grad-a), var(--grad-b));
}
.hero-decor i:nth-child(1) { width: 88px; height: 88px; left: 7%;  top: 26%;
  opacity: .14; animation: float-a 20s ease-in-out infinite; }
.hero-decor i:nth-child(2) { width: 54px; height: 54px; right: 11%; top: 17%;
  opacity: .12; animation: float-b 26s ease-in-out infinite; }
.hero-decor i:nth-child(3) { width: 36px; height: 36px; left: 17%; bottom: 18%;
  opacity: .1;  animation: float-b 30s ease-in-out infinite reverse; }
.hero-decor i:nth-child(4) { width: 66px; height: 66px; right: 7%; bottom: 26%;
  opacity: .12; animation: float-a 24s ease-in-out infinite reverse; }

@keyframes float-a {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50%      { transform: translateY(-26px) rotate(9deg); }
}
@keyframes float-b {
  0%, 100% { transform: translateY(0) rotate(45deg); }
  50%      { transform: translateY(20px) rotate(28deg); }
}

/* 入场：逐层浮起 */
@keyframes rise {
  from { opacity: 0; transform: translateY(26px); }
  to   { opacity: 1; transform: none; }
}
.hero__inner { position: relative; z-index: 1; }
.hero__inner > * { animation: rise .7s var(--ease-out) both; }
.hero__inner > *:nth-child(1) { animation-delay: .04s; }
.hero__inner > *:nth-child(2) { animation-delay: .12s; }
.hero__inner > *:nth-child(3) { animation-delay: .2s; }
.hero__inner > *:nth-child(4) { animation-delay: .3s; }
.hero__inner > *:nth-child(5) { animation-delay: .42s; }

/* 大标题流光扫过 */
.display { position: relative; overflow: hidden; }
.display::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0; left: 0;
  width: 45%;
  background: linear-gradient(105deg,
    transparent 0%, rgba(255, 255, 255, .28) 50%, transparent 100%);
  transform: translateX(-160%) skewX(-12deg);
  animation: sheen 4.8s var(--ease-out) 1.2s infinite;
  pointer-events: none;
}
html[data-theme="dark"] .display::after {
  background: linear-gradient(105deg,
    transparent 0%, rgba(255, 255, 255, .16) 50%, transparent 100%);
}
@keyframes sheen {
  0%   { transform: translateX(-160%) skewX(-12deg); }
  46%  { transform: translateX(320%) skewX(-12deg); }
  100% { transform: translateX(320%) skewX(-12deg); }
}

.hero__inner { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 22px; }

.status-card {
  width: min(720px, 100%);
  margin-top: 18px;
  text-align: left;
}

.card {
  background: var(--md-surface-container);
  border: 1px solid var(--md-outline-variant);
  border-radius: 24px;
  box-shadow: var(--shadow-2);
}

.status-card { padding: 28px 32px; }

.status-card__head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.status-card__state { font-weight: 500; }
.status-card__time { margin-left: auto; font-size: .78rem; color: var(--md-on-surface-variant); }

.live-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--md-on-surface-variant); }
.live-dot.is-online { background: var(--md-success); animation: pulse 2.2s ease-out infinite; }
.live-dot.is-offline { background: var(--md-error); }

@keyframes pulse {
  0%        { box-shadow: 0 0 0 0 rgba(52, 168, 83, .4); }
  60%, 100% { box-shadow: 0 0 0 9px transparent; }
}

.status-card__ip {
  display: flex; align-items: center; gap: 14px;
  margin-top: 18px; padding: 12px 18px 12px 13px;
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-md);
}
.status-logo {
  width: 44px; height: 44px; border-radius: var(--radius-sm);
  image-rendering: pixelated;
  box-shadow: var(--shadow-1);
}
.status-card__ip code {
  font-family: ui-monospace, "Roboto Mono", "SF Mono", Consolas, monospace;
  font-size: clamp(1.15rem, 3vw, 1.5rem); font-weight: 700; letter-spacing: .01em;
}
.status-card__ip .btn { margin-left: auto; }

.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px;
  margin-top: 18px;
}
.stat {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 18px 8px; border-radius: 16px;
  background: var(--md-surface); border: 1px solid var(--md-outline-variant);
  transition: transform var(--dur-fast) var(--ease-emph);
}
.stat:hover { transform: translateY(-3px); }
.stat__value {
  font-size: clamp(1.3rem, 2.6vw, 1.7rem); font-weight: 700;
  font-variant-numeric: tabular-nums; letter-spacing: -.02em;
}
.stat__label { font-size: .82rem; color: var(--md-on-surface-variant); }
.stat__value.is-good { color: var(--md-success); }
.stat__value.is-far { color: #e8a15c; }

.meter {
  height: 8px; margin-top: 16px;
  background: var(--md-surface-container-high);
  border-radius: var(--radius-full); overflow: hidden;
}
.meter__fill {
  height: 100%; width: var(--w, 0%);
  background: linear-gradient(90deg, var(--g-blue), var(--grad-c), var(--g-blue));
  background-size: 200% 100%;
  animation: gradflow 4s linear infinite;
  border-radius: inherit;
  transition: width .9s var(--ease-emph);
}

.chips { list-style: none; display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 8px;
  background: var(--md-primary-container); color: var(--md-on-primary-container);
  font-size: .82rem; font-weight: 500;
  transition: transform .25s var(--ease-out), filter .25s ease;
}
.chip:hover { transform: translateY(-3px) scale(1.05); filter: brightness(1.08); }
.chip .icon--sm { width: 14px; height: 14px; }

.motd {
  margin-top: 16px; padding: 15px 20px;
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: .92rem; line-height: 1.7;
  letter-spacing: .01em;
  color: var(--md-on-surface-variant);
  white-space: pre-wrap; word-break: break-word;
}

.hero__actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 10px; }

/* ── 图片展示 ─────────────────────────────────────────────── */
.gallery-card {
  position: relative;
  overflow: hidden;
  margin: 0;
  border-radius: 24px;
  border: 1px solid var(--md-outline-variant);
  background: var(--md-surface-container);
  aspect-ratio: 16 / 9;
  transform: translateY(3px) scale(.992);
  transition: box-shadow .35s var(--ease-out), border-color .35s ease;
}
.gallery-card:hover { box-shadow: var(--shadow-hover); border-color: transparent; }
.gallery-card img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
  transition: transform .6s var(--ease-out);
}
.gallery-card:hover img { transform: scale(1.06); }
.gallery-card::after,
.person-card::after,
.thanks-card::after {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 300px; height: 300px;
  margin: -150px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle closest-side, var(--spot-color), transparent 70%);
  opacity: 0;
  transition: opacity .45s ease;
  will-change: transform;
}
.gallery-card:hover::after,
.person-card:hover::after,
.thanks-card:hover::after { opacity: 1; }
.gallery-card__caption {
  position: absolute;
  left: 14px; bottom: 14px;
  min-width: 30%;
  padding: 9px 20px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, .1);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, .08),
    0 0 16px -2px rgba(167, 139, 250, .18),
    0 0 32px -6px rgba(167, 139, 250, .1),
    inset 0 1px 1px rgba(255, 255, 255, .35),
    inset 0 -1px 0 rgba(255, 255, 255, .08),
    inset 0 -14px 24px -18px rgba(255, 255, 255, .4),
    var(--glass-shadow);
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, .35);
  font-size: .88rem; font-weight: 550;
  text-align: center;
  will-change: transform;
  z-index: 1;
}

/* 液态玻璃边缘折射环 */
.gallery-card__caption::before,
.lightbox__caption::before {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: -1;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(145deg,
    rgba(255, 255, 255, .7),
    rgba(255, 255, 255, .12) 28%,
    rgba(255, 255, 255, .05) 52%,
    rgba(255, 255, 255, .45) 78%,
    rgba(255, 255, 255, .65));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask-composite: exclude;
  pointer-events: none;
}

/* ── Liquid Glass 折射 + 散射 + 边缘放大 ─────────────────── */
/*  ═══ Liquid Glass — Apple 风格 CSS 液态玻璃 ═══
    通过多层伪元素 + box-shadow + mask 模拟：
    ① 边缘折射环（厚 inset shadow 色散）
    ② 边缘散射光晕（径向渐变 + mask 仅边缘可见）
    ③ 高光（radial-gradient 模拟镜面反射）
    ④ 色散边框（红蓝分离渐变边框）
    ⑤ 漫射内光（inset radial-gradient）   */

.liquid-glass {
  --lg-rx: 0px;
  --lg-ry: 0px;
  --lg-glow: 0;
  --lg-spec-x: 20%;
  --lg-spec-y: 15%;
  position: relative;
  z-index: 0;
}

/* ──::before = 折射边框（色散环 + 放大环） ── */
.liquid-glass::before {
  content: "";
  position: absolute;
  inset: -2px;
  z-index: -1;
  border-radius: inherit;
  padding: 2.5px;
  background: linear-gradient(145deg,
    rgba(255, 255, 255, .72) 0%,
    rgba(255, 255, 255, .08) 25%,
    rgba(167, 139, 250, .06) 45%,
    rgba(255, 255, 255, .04) 60%,
    rgba(96, 165, 250, .12) 78%,
    rgba(255, 255, 255, .6) 100%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
          mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
          mask-composite: exclude;
  opacity: .55;
  transition: opacity .4s ease;
  pointer-events: none;
}
.liquid-glass:hover::before {
  opacity: .85;
}

/* ──::after = 散射光晕 + 边缘放大 + 高光 ── */
.liquid-glass::after {
  content: "";
  position: absolute;
  inset: -6px;
  z-index: -1;
  border-radius: inherit;
  /* 散射：边缘两个光斑（左上白，右下紫） */
  background:
    radial-gradient(ellipse 120% 80% at var(--lg-spec-x) var(--lg-spec-y),
      rgba(255, 255, 255, .22) 0%, transparent 55%),
    radial-gradient(ellipse 100% 90% at 82% 85%,
      rgba(167, 139, 250, .16) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%,
      rgba(255, 255, 255, .04) 0%, transparent 70%);
  /* mask：仅边缘可见，中心透明 */
  -webkit-mask: radial-gradient(circle,
      transparent 45%, black 68%, black 100%);
          mask: radial-gradient(circle,
      transparent 45%, black 68%, black 100%);
  opacity: var(--lg-glow);
  transform: scale(1.03);
  transition: opacity .45s ease, transform .4s cubic-bezier(.25,.46,.45,.94);
  pointer-events: none;
}
.liquid-glass:hover::after {
  --lg-glow: 1;
  transform: scale(1.06);
}

/* ═══ Liquid Glass Edge — 普通卡片：轻微质感 ═══ */
.liquid-glass--edge {
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, .08),
    inset 0 1px 0 rgba(255, 255, 255, .12),
    inset 0 -20px 40px -24px rgba(255, 255, 255, .06),
    0 0 32px -8px rgba(138, 180, 248, .08);
  transition: box-shadow .35s ease, transform .35s cubic-bezier(.25,.46,.45,.94);
}
.liquid-glass--edge:hover {
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, .14),
    inset 0 1px 0 rgba(255, 255, 255, .18),
    inset 0 -28px 48px -22px rgba(255, 255, 255, .1),
    0 0 44px -6px rgba(138, 180, 248, .12);
  transform: scale(1.005);
}

/* ── Liquid Glass 灯箱（点击放大预览） ────────────────────── */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: clamp(16px, 4vw, 48px);
  opacity: 0;
  visibility: hidden;
  transition: opacity .38s ease, visibility .38s ease;
}
.lightbox.open { opacity: 1; visibility: visible; }
.lightbox::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(9, 10, 12, .78);
  -webkit-backdrop-filter: blur(20px) saturate(150%);
  backdrop-filter: blur(20px) saturate(150%);
}
.lightbox__stage {
  position: relative;
  margin: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  transform: scale(.92) translateY(18px);
  transition: transform .45s var(--ease-out);
}
.lightbox.open .lightbox__stage { transform: none; }
.lightbox__img {
  max-width: min(1240px, 94vw);
  max-height: 78vh;
  border-radius: 22px;
  box-shadow: 0 34px 90px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .08);
  user-select: none;
}
.lightbox__caption {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  padding: 10px 26px;
  border-radius: var(--radius-full);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, .1);
  box-shadow:
    0 0 0 1px rgba(255, 255, 255, .08),
    0 0 16px -2px rgba(167, 139, 250, .18),
    0 0 32px -6px rgba(167, 139, 250, .1),
    inset 0 1px 1px rgba(255, 255, 255, .35),
    inset 0 -1px 0 rgba(255, 255, 255, .08),
    inset 0 -14px 24px -18px rgba(255, 255, 255, .4),
    var(--glass-shadow);
  color: #fff;
  font-size: .95rem; font-weight: 550;
  text-align: center;
  will-change: transform;
  contain: layout style paint;
}
.lightbox__btn {
  position: relative;
  z-index: 1;
  width: 52px; height: 52px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .15);
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, .3),
    inset 0 -8px 14px -10px rgba(255, 255, 255, .2),
    0 0 0 1px rgba(255, 255, 255, .06),
    0 0 12px -4px rgba(167, 139, 250, .1),
    var(--glass-shadow);
  color: #fff;
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  display: grid; place-items: center;
  will-change: transform;
  transition: transform var(--dur-fast) var(--ease-emph),
              filter var(--dur-fast) ease,
              box-shadow .25s ease,
              border-color .25s ease;
}
.lightbox__btn:hover {
  transform: scale(1.08);
  filter: brightness(1.15);
  border-color: rgba(255, 255, 255, .28);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, .4),
    inset 0 -8px 14px -10px rgba(255, 255, 255, .25),
    0 0 20px rgba(138, 180, 248, .15),
    var(--glass-shadow);
}
.lightbox__btn:active { transform: scale(.94); }
.lightbox__close {
  position: absolute;
  top: clamp(16px, 3.5vh, 32px);
  right: clamp(16px, 3.5vw, 36px);
}
@media (max-width: 720px) {
  .lightbox { flex-wrap: wrap; }
  .lightbox__nav { position: absolute; top: 50%; margin-top: -26px; z-index: 1; }
  .lightbox__prev { left: 14px; }
  .lightbox__next { right: 14px; }
}

/* ── 卡片网格 ─────────────────────────────────────────────── */
.grid { display: grid; gap: 20px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.person-card {
  position: relative;
  overflow: hidden;
  display: flex; flex-direction: column; align-items: center; text-align: center;
  padding: 36px 24px;
  background: var(--md-surface-container);
  border: 1px solid var(--md-outline-variant);
  border-radius: 24px;
  transform: translateY(3px) scale(.992);
  transition: box-shadow .35s var(--ease-out), border-color .35s ease;
}
.person-card:hover { box-shadow: var(--shadow-hover); border-color: transparent; }

.person-card__avatar {
  width: 104px; height: 104px; border-radius: 26px;
  display: grid; place-items: center;
  font-size: 2rem; font-weight: 700; color: #fff;
  background: linear-gradient(135deg, var(--av-a, #4285f4), var(--av-b, #a78bdb));
  box-shadow: var(--shadow-1);
  overflow: hidden; user-select: none;
  transition: transform .35s var(--ease-out);
}
.person-card:hover .person-card__avatar { transform: scale(1.05) rotate(-1.5deg); }
.person-card__avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }

.person-card__name { margin-top: 18px; font-size: 1.1rem; font-weight: 500; }
.person-card__role {
  margin-top: 8px; font-size: .82rem; font-weight: 500;
  background: var(--md-primary-container); color: var(--md-on-primary-container);
  padding: 3px 14px; border-radius: var(--radius-full);
}

.person-card__email {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 10px;
  padding: 4px 10px;
  font-size: .78rem;
  color: var(--md-on-surface-variant);
  text-decoration: none;
  border-radius: var(--radius-full);
  background: var(--md-surface-container-high);
  border: 1px solid var(--md-outline-variant);
  transition: color var(--dur-fast) ease, background-color var(--dur-fast) ease,
              border-color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out);
}
.person-card__email:hover {
  color: var(--md-primary);
  background: var(--md-primary-container);
  border-color: var(--md-primary);
  transform: translateY(-1px);
}
.person-card__email::before {
  content: "";
  display: inline-block;
  width: 14px; height: 14px;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2m0 4v14H4V6h16v14'/%3E%3C/svg%3E") center / contain no-repeat;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M20 4H4c-1.1 0-1.99.9-1.99 2L2 18c0 1.1.9 2 2 2h16c1.1 0 2-.9 2-2V6c0-1.1-.9-2-2-2m0 4v14H4V6h16v14'/%3E%3C/svg%3E") center / contain no-repeat;
  background-color: currentColor;
}

.thanks-card {
  position: relative;
  overflow: hidden;
  display: flex; flex-direction: column; align-items: center; text-align: center;
  gap: 14px; padding: 32px 20px;
  background: var(--md-surface-container);
  border: 1px solid var(--md-outline-variant);
  border-radius: 24px;
  text-decoration: none; color: var(--md-on-surface);
  transform: translateY(3px) scale(.992);
  transition: box-shadow .35s var(--ease-out), border-color .35s ease;
}
.thanks-card:hover { box-shadow: var(--shadow-hover); border-color: transparent; }
.thanks-card__logo {
  width: 84px; height: 84px; border-radius: 20px;
  display: grid; place-items: center;
  background: var(--md-surface);
  overflow: hidden;
  transition: transform .3s var(--ease-out);
}
.thanks-card:hover .thanks-card__logo { transform: scale(1.06); }
.thanks-card__logo img { width: 76px; height: 76px; object-fit: contain; display: block; }
.thanks-card__logo svg { width: 34px; height: 34px; fill: var(--md-on-surface-variant); }
.thanks-card__name { font-weight: 500; font-size: 1rem; }
.thanks-card__desc { font-size: .84rem; color: var(--md-on-surface-variant); line-height: 1.5; }

/* ── 联系我们 ─────────────────────────────────────────────── */
.contact-wrap { display: flex; flex-direction: column; }
.contact-card {
  display: flex; align-items: center; gap: 24px; flex-wrap: wrap;
  width: min(720px, 100%); margin-inline: auto;
  padding: 32px 40px;
}
.contact-card__icon {
  width: 64px; height: 64px; border-radius: 18px;
  display: grid; place-items: center; flex-shrink: 0;
  background: conic-gradient(from 200deg, var(--g-blue), var(--grad-c), var(--g-red), var(--g-blue));
  box-shadow: var(--shadow-1);
}
.contact-card__icon svg { width: 30px; height: 30px; fill: #fff; }
.contact-card__body { display: flex; flex-direction: column; }
.contact-card__label { font-size: .85rem; color: var(--md-on-surface-variant); font-weight: 500; }
.contact-card__number {
  font-family: ui-monospace, "Roboto Mono", Consolas, monospace;
  font-size: clamp(1.6rem, 4vw, 2.1rem); font-weight: 700; letter-spacing: .02em;
  font-variant-numeric: tabular-nums;
}
.contact-card .btn { margin-left: auto; }

/* ── 页脚 ─────────────────────────────────────────────────── */
.footer { border-top: 1px solid var(--md-outline-variant); padding: 72px 0 44px; }

.footer__top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 56px;
}
.footer__brand { display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 1.15rem; letter-spacing: -.01em; }
.footer__tagline {
  margin-top: 18px;
  font-size: 1.05rem; font-weight: 550;
  background: linear-gradient(100deg, var(--grad-a), var(--grad-c));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  transition: background-position .4s ease;
}
.footer__meta { margin-top: 8px; font-size: .85rem; color: var(--md-on-surface-variant); }

.footer__head {
  font-size: .74rem; font-weight: 650;
  letter-spacing: .2em; text-transform: uppercase;
  color: var(--md-on-surface-variant);
  margin-bottom: 14px;
  transition: letter-spacing .3s var(--ease-out);
}
.footer__head:hover {
  letter-spacing: .28em;
}
.footer__col a, .linklike {
  display: block;
  padding: 5px 0;
  color: var(--md-on-surface-variant);
  text-decoration: none;
  font-size: .92rem;
  transition: color var(--dur-fast) ease, transform var(--dur-fast) var(--ease-out);
}
.footer__col a:hover, .linklike:hover {
  color: var(--md-primary);
  transform: translateX(4px);
}

.linklike {
  border: none; background: none;
  font: inherit; cursor: pointer;
  text-align: left;
}

.footer__bar {
  display: flex; flex-wrap: wrap; gap: 10px 28px;
  justify-content: space-between; align-items: center;
  border-top: 1px solid var(--md-outline-variant);
  padding-top: 26px;
  font-size: .82rem; color: var(--md-on-surface-variant);
}
.footer__credit strong {
  margin-left: 8px;
  font-weight: 600;
  letter-spacing: .04em;
  background: linear-gradient(100deg, var(--grad-a), var(--grad-c));
  -webkit-background-clip: text; background-clip: text; color: transparent;
  transition: filter .25s ease;
}
.footer__credit strong:hover { filter: brightness(1.25); }
.footer__legal {
  margin-top: 18px;
  font-size: .75rem; line-height: 1.7;
  color: var(--md-on-surface-variant);
  opacity: .65;
}

/* ── 微动效 ─────────────────────────────────────────────── */
.brand,
.brand__mark--sm {
  transition: transform .28s var(--ease-out);
}
.brand:hover { transform: scale(1.03); }
.brand__mark--sm { transition: transform .35s var(--ease-out); }
.footer__brand:hover .brand__mark--sm { transform: rotate(6deg); }

.status-logo {
  width: 42px; height: 42px; border-radius: 10px;
  object-fit: cover;
  transition: transform .28s var(--ease-out), box-shadow .28s ease;
}
.status-logo:hover {
  transform: scale(1.08) rotate(-2deg);
  box-shadow: 0 0 0 3px var(--md-primary-container);
}

.stat:hover .stat__value { transform: scale(1.05); }
.stat:hover .stat__label { transform: translateY(-2px); }
.stat__value,
.stat__label {
  transition: transform .22s var(--ease-out);
}

.motd {
  border-radius: 14px;
  transition: border-color .22s ease, box-shadow .22s ease;
}
.motd:hover {
  border-color: var(--md-primary);
  box-shadow: 0 0 0 1px var(--md-primary);
}

.contact-card__icon {
  transition: transform .28s var(--ease-out), box-shadow .28s ease;
}
.contact-card__icon:hover {
  transform: scale(1.06) rotate(4deg);
  box-shadow: 0 0 0 3px var(--md-primary-container), var(--shadow-1);
}
.contact-card__number {
  transition: color .2s ease;
  cursor: default;
}
.contact-card:hover .contact-card__number {
  color: var(--md-primary);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: .55; }
}
.status-card__state {
  animation: pulse-dot 3s ease-in-out infinite;
}

.status-card__time {
  transition: opacity .2s ease;
}
.status-card__time:not(:empty) {
  animation: pulse-dot 3s ease-in-out infinite;
  animation-delay: 1s;
}

/* ── Toast ────────────────────────────────────────────────── */
.toast {
  position: fixed; left: 50%; bottom: 32px; z-index: 200;
  transform: translate(-50%, 80px);
  padding: 12px 24px; border-radius: 8px;
  background: var(--md-on-surface); color: var(--md-surface);
  font-size: .9rem; font-weight: 500;
  box-shadow: var(--shadow-hover);
  opacity: 0; pointer-events: none;
  transition: transform .4s var(--ease-out), opacity .4s ease;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }

/* ── 滚动浮现：像从后方贴上来（缩放 + 上浮 + 淡入） ── */
.reveal { opacity: 0; }
.reveal.is-visible {
  opacity: 1;
  animation: paste-in 1s cubic-bezier(.16, 1, .3, 1) backwards;
}
@keyframes paste-in {
  from {
    opacity: 0;
    transform: perspective(900px) translate3d(0, 58px, -90px) scale(.92);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ── 管理员模式 · Liquid Glass 密码验证 ───────────────────── */
.nav__admin { color: var(--md-on-surface-variant); border-color: var(--md-outline-variant); }
.nav__admin:hover { color: var(--md-primary); }

.nav__docs {
  background: linear-gradient(135deg, #4285f4, #a78bdb, #f472b6, #4285f4);
  background-size: 300% 300%;
  animation: docs-gradient 4s ease infinite;
  color: #fff;
  border: none;
}
.nav__docs:hover {
  filter: brightness(1.12);
  box-shadow: 0 0 20px rgba(167, 139, 250, .35);
}
@keyframes docs-gradient {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.passcode {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .4s ease, visibility .4s ease;
}
.passcode::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(4, 5, 8, .22);
}
.passcode.open { opacity: 1; visibility: visible; }

.passcode__sheet {
  position: relative;
  overflow: hidden;
  width: min(360px, calc(100vw - 48px));
  padding: 34px 30px 38px;
  border-radius: 46px;
  background: rgba(12, 14, 20, .55);
  border: 1px solid rgba(255, 255, 255, .1);
  backdrop-filter: blur(0.25px) contrast(1.15) brightness(1.03) saturate(1.15);
  -webkit-backdrop-filter: blur(0.25px) contrast(1.15) brightness(1.03) saturate(1.15);
  box-shadow:
    0 24px 80px rgba(0, 0, 0, .5),
    0 0 1px rgba(255, 255, 255, .15);
  transform: scale(.88) translateY(26px);
  will-change: transform;
  transition: transform .5s cubic-bezier(.16, 1, .3, 1);
}
.passcode.open .passcode__sheet { transform: none; }
/* 散射光带（保留，增加真实感） */
.passcode__sheen {
  position: absolute;
  top: -40%; bottom: -40%;
  left: 0;
  width: 35%;
  background: linear-gradient(105deg,
    transparent 0%,
    rgba(255, 255, 255, .04) 30%,
    rgba(200, 220, 255, .07) 42%,
    rgba(255, 255, 255, .05) 52%,
    transparent 100%);
  transform: translateX(-160%) skewX(-10deg);
  animation: sheet-sheen 9s ease-in-out 1.5s infinite;
  pointer-events: none;
}
@keyframes sheet-sheen {
  0%, 45%  { transform: translateX(-160%) skewX(-10deg); }
  82%, 100% { transform: translateX(400%) skewX(-10deg); }
}

.passcode__title {
  text-align: center;
  color: #fff;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: .01em;
}
.passcode__subtitle {
  text-align: center;
  margin-top: 4px;
  color: rgba(255, 255, 255, .62);
  font-size: .82rem;
}

.passcode__dots {
  display: flex;
  justify-content: center;
  gap: 18px;
  margin: 26px 0 8px;
  height: 14px;
}
.passcode__dots span {
  width: 13px; height: 13px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .2);
  border: 1px solid rgba(255, 255, 255, .22);
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, .1);
  transition: background-color .22s ease, transform .22s var(--ease-out),
              border-color .22s ease, box-shadow .22s ease;
}
.passcode__dots span.fill {
  background: #fff;
  border-color: rgba(255, 255, 255, .8);
  transform: scale(1.12);
  box-shadow: inset 0 1px 2px rgba(255, 255, 255, .3), 0 0 8px rgba(255, 255, 255, .2);
}
.passcode__dots span.ok {
  background: var(--md-success);
  border-color: transparent;
  transform: scale(1.18);
}
.passcode__dots.error span {
  background: var(--md-error);
  border-color: transparent;
  animation: pc-shake .5s cubic-bezier(.36,.07,.19,.97);
}
@keyframes pc-shake {
  10%, 90%      { transform: translateX(-2px); }
  20%, 80%      { transform: translateX(4px); }
  30%, 50%, 70% { transform: translateX(-7px); }
  40%, 60%      { transform: translateX(7px); }
}

.passcode__pad {
  display: grid;
  grid-template-columns: repeat(3, 76px);
  gap: 17px;
  justify-content: center;
  margin-top: 22px;
}
.pc-key {
  width: 76px; height: 76px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .1);
  background: rgba(12, 14, 20, .35);
  backdrop-filter: blur(0.25px) contrast(1.15) brightness(1.03) saturate(1.15);
  -webkit-backdrop-filter: blur(0.25px) contrast(1.15) brightness(1.03) saturate(1.15);
  box-shadow: 0 8px 22px rgba(0, 0, 0, .32);
  color: #fff;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  line-height: 1;
  user-select: none;
  transition: transform .3s cubic-bezier(.34,1.56,.64,1),
              filter .18s ease, box-shadow .25s ease, border-color .25s ease;
}
.pc-key:hover {
  filter: brightness(1.22);
  border-color: rgba(255, 255, 255, .18);
}
.pc-key:active,
.pc-key.is-pressed { transform: scale(.86); filter: brightness(1.45); }
.pc-key__num { font-size: 27px; font-weight: 400; }
.pc-key__letters {
  margin-top: 3px;
  font-size: 9px;
  letter-spacing: .18em;
  color: rgba(255, 255, 255, .55);
  font-weight: 500;
  height: 10px;
}
.pc-key--ghost { background: none; border-color: transparent; box-shadow: none; }
.pc-key--ghost:hover { filter: none; }
.pc-key[data-close] { color: rgba(255, 255, 255, .6); }
.pc-key[data-close]:hover {
  filter: brightness(1.3);
}
.pc-key {
  position: relative;
}

@media (max-width: 400px) {
  .passcode__pad { grid-template-columns: repeat(3, 68px); gap: 13px; }
  .pc-key { width: 68px; height: 68px; }
}

/* ── 响应式 ───────────────────────────────────────────────── */
@media (max-width: 900px) {
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .nav__links { display: none; }
  .nav__cta { margin-left: auto; }
  .hero-decor { display: none; }
}

@media (max-width: 640px) {
  .container { width: calc(100% - 36px); }
  .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .status-card { padding: 22px; }
  .contact-card { padding: 26px; }
  .contact-card .btn { margin-left: 0; width: 100%; }
  .footer__top { grid-template-columns: 1fr; gap: 32px; padding-bottom: 44px; }
  .footer__bar { flex-direction: column; text-align: center; justify-content: center; }
}