/* ============================================================
   毛巾小站 · 首页样式
   深色极光背景 + 玻璃卡片 + 鼠标跟随光斑
   ============================================================ */

:root {
  color-scheme: dark;
  --bg: #060911;
  --ink: #eef2ff;
  --dim: #97a3c6;
  --line: rgba(255, 255, 255, 0.085);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.4, 0.64, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100dvh;
  font-family: "Inter", "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1100px 720px at 12% -12%, #16204a 0%, transparent 62%),
    radial-gradient(980px 680px at 108% 2%, #0a2737 0%, transparent 58%),
    radial-gradient(900px 620px at 50% 118%, #1b1330 0%, transparent 60%),
    var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---------- 背景：极光光斑 ---------- */

.aurora {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.aurora__blob {
  position: absolute;
  display: block;
  border-radius: 50%;
  filter: blur(84px);
}

.aurora__blob--violet {
  width: 44vmax;
  height: 44vmax;
  left: -14vmax;
  top: -18vmax;
  opacity: 0.5;
  background: radial-gradient(circle, #6b4bff 0%, rgba(107, 75, 255, 0) 70%);
  animation: drift-a 26s var(--ease) infinite;
}

.aurora__blob--cyan {
  width: 36vmax;
  height: 36vmax;
  right: -12vmax;
  top: -8vmax;
  opacity: 0.3;
  background: radial-gradient(circle, #11b8c9 0%, rgba(17, 184, 201, 0) 70%);
  animation: drift-b 33s var(--ease) infinite;
}

.aurora__blob--rose {
  width: 32vmax;
  height: 32vmax;
  left: 34%;
  bottom: -22vmax;
  opacity: 0.22;
  background: radial-gradient(circle, #e0559a 0%, rgba(224, 85, 154, 0) 70%);
  animation: drift-c 39s var(--ease) infinite;
}

@keyframes drift-a {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(5vw, 4vh, 0) scale(1.1);
  }
}

@keyframes drift-b {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1.05);
  }
  50% {
    transform: translate3d(-5vw, 5vh, 0) scale(0.95);
  }
}

@keyframes drift-c {
  0%,
  100% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(-4vw, -4vh, 0) scale(1.12);
  }
}

/* ---------- 背景：颗粒噪点 ---------- */

.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.045;
  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");
}

/* ---------- 页面骨架 ---------- */

.page {
  position: relative;
  z-index: 2;
  width: min(1080px, 100%);
  min-height: 100dvh;
  margin: 0 auto;
  padding: clamp(34px, 6vw, 76px) 20px 32px;
  display: flex;
  flex-direction: column;
  gap: clamp(28px, 4.4vw, 46px);
}

/* ---------- 标题区 ---------- */

.hero {
  text-align: center;
  animation: rise 0.7s var(--ease) both;
}

.hero__eyebrow {
  margin: 0 0 14px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: rgba(151, 163, 198, 0.9);
}

.hero__title {
  margin: 0;
  font-size: clamp(40px, 7.4vw, 68px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.045em;
  background: linear-gradient(150deg, #ffffff 0%, #c8d6ff 42%, #8ea6ef 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 18px 44px rgba(110, 140, 255, 0.25));
}

.hero__sub {
  margin: 14px 0 0;
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: var(--dim);
}

/* ---------- 卡片网格 ---------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(292px, 1fr));
  gap: 16px;
  perspective: 1200px;
}

/* ---------- 卡片 ---------- */

.card {
  --lift: 0px;
  --tx: 0deg;
  --ty: 0deg;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 20px 20px 17px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: linear-gradient(
    160deg,
    rgba(255, 255, 255, 0.072),
    rgba(255, 255, 255, 0.022)
  );
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.09), 0 20px 44px -34px #000;
  color: inherit;
  text-decoration: none;
  overflow: hidden;
  isolation: isolate;
  transform: translateY(var(--lift)) rotateX(var(--ty)) rotateY(var(--tx));
  transition: transform 0.34s var(--ease), border-color 0.3s, box-shadow 0.34s;
  animation: rise 0.72s var(--ease) backwards;
  animation-delay: calc(90ms + var(--i, 0) * 80ms);
  -webkit-tap-highlight-color: transparent;
}

/* 跟随鼠标的柔光 */
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(
    240px circle at var(--mx, 50%) var(--my, -20%),
    rgba(255, 255, 255, 0.12),
    rgba(255, 255, 255, 0) 68%
  );
  opacity: 0;
  transition: opacity 0.35s;
}

/* 顶部彩色高光条 */
.card::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-a), var(--accent-b));
  opacity: 0;
  transform: scaleX(0.35);
  transition: opacity 0.35s, transform 0.45s var(--ease);
}

.card:hover {
  --lift: -6px;
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.14), 0 30px 60px -36px #000;
}

.card:hover::before {
  opacity: 1;
}

.card:hover::after {
  opacity: 0.9;
  transform: scaleX(1);
}

.card:focus-visible {
  outline: 2px solid #9db4ff;
  outline-offset: 3px;
}

.card__glow {
  position: absolute;
  width: 120px;
  height: 120px;
  left: -26px;
  top: -26px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-a), transparent 70%);
  opacity: 0.26;
  filter: blur(22px);
  z-index: -1;
  transition: opacity 0.35s, transform 0.5s var(--ease);
}

.card:hover .card__glow {
  opacity: 0.5;
  transform: scale(1.25);
}

.card__num {
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  font-variant-numeric: tabular-nums;
  color: rgba(255, 255, 255, 0.2);
}

.card__icon {
  width: 46px;
  height: 46px;
  margin-bottom: 13px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #08101f;
  background: linear-gradient(140deg, var(--accent-a), var(--accent-b));
  box-shadow: 0 12px 26px -14px var(--accent-a), inset 0 1px 0 rgba(255, 255, 255, 0.55);
  transition: transform 0.4s var(--ease-spring);
}

.card__icon[data-long] {
  font-size: 12px;
  letter-spacing: -0.03em;
}

.card:hover .card__icon {
  transform: translateY(-2px) rotate(-3deg) scale(1.04);
}

.card__title {
  margin: 0;
  font-size: 17.5px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card__desc {
  margin: 7px 0 0;
  font-size: 12.8px;
  line-height: 1.62;
  color: var(--dim);
}

.card__meta {
  margin: 12px 0 0;
  font-size: 10.8px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(151, 163, 198, 0.72);
}

.card__go {
  margin-top: auto;
  padding-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--accent-a);
  transition: gap 0.25s var(--ease);
}

.card:hover .card__go {
  gap: 11px;
}

.card__arrow {
  transition: transform 0.25s var(--ease);
}

/* ---------- 页脚 ---------- */

.foot {
  margin-top: auto;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 11.5px;
  letter-spacing: 0.02em;
  color: rgba(151, 163, 198, 0.7);
}

kbd {
  display: inline-block;
  min-width: 19px;
  padding: 2px 6px;
  margin: 0 1px;
  font: inherit;
  font-size: 10.5px;
  font-weight: 700;
  text-align: center;
  color: #d6dffa;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-bottom-width: 2px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
}

/* ---------- 入场动画 ---------- */

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.985);
  }
  to {
    opacity: 1;
  }
}

/* ---------- 窄屏 ---------- */

@media (max-width: 520px) {
  .page {
    padding: 30px 16px 24px;
    gap: 24px;
  }

  .grid {
    grid-template-columns: 1fr;
    gap: 13px;
  }

  .card {
    padding: 18px 17px 15px;
  }

  .hero__sub {
    font-size: 13.5px;
  }

  .foot {
    justify-content: center;
    text-align: center;
  }
}

/* ---------- 减少动效 ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}