* { font-family: 'Sora', system-ui, sans-serif; }
.font-display { font-family: 'Orbitron', sans-serif; }
[x-cloak] { display: none !important; }

/*
 * 主题变量与主应用 `app.html` 保持同一套命名。
 * 登录页先给一组柔和的默认配色，底部脚本再读取本地主题覆盖这些变量。
 * 这样从登录页进入主页面时，视觉风格会更统一，不会突然跳色。
 */
:root {
  /* 默认即采用主应用同款「量子星云」科幻配色，未设置主题时也保持统一冷调；
     若用户在主应用里选过主题，index-theme-sync.js 会用本地变量覆盖这里。 */
  --bg-1: #060816;
  --bg-2: #11142b;
  --bg-3: #26174a;
  --bg-flow-duration: 28s;
  --aurora-duration: 24s;
  --twinkle-duration: 5.5s;
  --motion-factor: 1;
  --accent-1: #8cf7ff;
  --accent-2: #7f7bff;
  --accent-3: #ff8ed8;
  --glow-a: 140, 247, 255;
  --glow-b: 127, 123, 255;
  --glow-c: 255, 142, 216;
  --panel-rgb: 14, 18, 38;
  --float-opacity: 0.86;
}

body {
  min-height: 100vh;
  color: #eef5ff;
  background:
    radial-gradient(circle at top left, rgba(var(--glow-a), 0.28), transparent 28%),
    radial-gradient(circle at bottom right, rgba(var(--glow-c), 0.22), transparent 26%),
    linear-gradient(135deg, var(--bg-1) 0%, var(--bg-2) 35%, var(--bg-3) 100%);
  background-size: 100% 100%, 100% 100%, 160% 160%;
  animation: bgFlow var(--bg-flow-duration) ease-in-out infinite alternate;
}
@keyframes bgFlow {
  0%   { background-position: 0% 0%, 100% 100%, 0% 50%; }
  100% { background-position: 0% 0%, 100% 100%, 100% 50%; }
}

.aurora, .stars, .mist, .sparkles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

/* 极光层：通过缓慢漂移和缩放，让登录页也保持梦幻流动感。 */
.aurora {
  inset: -25%;
  background:
    radial-gradient(40% 40% at 28% 30%, rgba(var(--glow-a), 0.20), transparent 60%),
    radial-gradient(45% 45% at 72% 38%, rgba(var(--glow-b), 0.18), transparent 60%),
    radial-gradient(42% 42% at 50% 76%, rgba(var(--glow-c), 0.15), transparent 60%);
  filter: blur(60px);
  animation: auroraDrift var(--aurora-duration) ease-in-out infinite alternate;
}
@keyframes auroraDrift {
  0%   { transform: translate3d(-4%, -2%, 0) rotate(0deg)  scale(1.05); }
  50%  { transform: translate3d(3%,  2%, 0) rotate(8deg)  scale(1.16); }
  100% { transform: translate3d(-2%, 3%, 0) rotate(-6deg) scale(1.08); }
}

/* 星点层：加入轻微明暗呼吸，让背景更有生命感。 */
.stars {
  background-image:
    radial-gradient(circle at 15% 30%, rgba(255,255,255,.95) 0 1px, transparent 1.5px),
    radial-gradient(circle at 70% 18%, rgba(255,245,227,.85) 0 1px, transparent 1.6px),
    radial-gradient(circle at 32% 72%, rgba(255,255,255,.75) 0 1px, transparent 1.4px),
    radial-gradient(circle at 82% 64%, rgba(255,233,210,.8) 0 1px, transparent 1.4px),
    radial-gradient(circle at 48% 46%, rgba(255,255,255,.7) 0 1px, transparent 1.3px);
  opacity: .7;
  animation: twinkle var(--twinkle-duration) ease-in-out infinite alternate;
}
@keyframes twinkle {
  0%   { opacity: .35; }
  50%  { opacity: .8; }
  100% { opacity: .55; }
}

.mist {
  background:
    radial-gradient(circle at 20% 20%, rgba(var(--glow-a), 0.18), transparent 20%),
    radial-gradient(circle at 78% 34%, rgba(var(--glow-b), 0.14), transparent 24%),
    radial-gradient(circle at 55% 78%, rgba(var(--glow-c), 0.14), transparent 22%);
  filter: blur(40px);
}

/* 漂浮光点：从页面底部向上缓慢飘动，补一点童话颗粒感。 */
.sparkles { overflow: hidden; }
.spark {
  position: absolute;
  bottom: -6%;
  color: rgba(var(--glow-c), .95);
  filter: drop-shadow(0 0 6px rgba(var(--glow-b), .85));
  opacity: 0;
  animation: floatUp linear infinite;
}
@keyframes floatUp {
  0%   { transform: translateY(0) rotate(0deg) scale(.8); opacity: 0; }
  12%  { opacity: .9; }
  88%  { opacity: .7; }
  100% { transform: translateY(-112vh) rotate(220deg) scale(1.1); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  body, .aurora, .stars, .spark { animation: none !important; }
}

.glass {
  position: relative;
  overflow: hidden;
  background: rgba(var(--panel-rgb), 0.52);
  border: 1px solid rgba(255, 221, 198, 0.14);
  backdrop-filter: blur(18px);
  box-shadow: 0 28px 80px -30px rgba(18, 5, 11, 0.8);
}
.floaters {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}
.floater {
  position: absolute;
  line-height: 1;
  opacity: var(--float-opacity);
  mix-blend-mode: screen;
  filter: drop-shadow(0 0 10px rgba(var(--glow-a), 0.2));
  transform-origin: center;
  animation:
    hoverDrift calc(var(--dur, 18s) * var(--motion-factor)) ease-in-out infinite alternate,
    shimmer calc((var(--dur, 18s) + 6s) * var(--motion-factor)) ease-in-out infinite;
}
@keyframes hoverDrift {
  0% { transform: translate3d(0, 0, 0) rotate(var(--start-rot, -8deg)) scale(var(--scale, .92)); }
  100% { transform: translate3d(var(--drift-x, 18px), var(--drift-y, -22px), 0) rotate(var(--end-rot, 8deg)) scale(calc(var(--scale, .92) + .06)); }
}
@keyframes shimmer {
  0%, 100% { filter: drop-shadow(0 0 8px rgba(var(--glow-a), 0.18)); }
  50% { filter: drop-shadow(0 0 16px rgba(var(--glow-b), 0.4)); }
}
@media (max-width: 768px) {
  .floater[data-mobile="hide"] { display: none; }
}
.field {
  width: 100%;
  border-radius: 1rem;
  border: 1px solid rgba(255, 226, 205, 0.12);
  background: rgba(0, 0, 0, 0.28);
  padding: 0.95rem 1rem;
  color: #fff7f0;
  transition: .2s ease;
}
.field:focus {
  outline: none;
  border-color: rgba(var(--glow-a), 0.5);
  box-shadow: 0 0 0 3px rgba(var(--glow-a), 0.16);
}
.field::placeholder { color: rgba(255, 231, 214, 0.4); }
.btn-main {
  background: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 52%, var(--accent-3) 100%);
  color: #3e1525;
  font-weight: 700;
  transition: transform .2s ease, box-shadow .2s ease;
  box-shadow: 0 16px 36px -16px rgba(var(--glow-a), 0.8);
}
.btn-main:hover {
  transform: translateY(-1px);
  box-shadow: 0 22px 42px -18px rgba(var(--glow-a), 0.9);
}
.btn-ghost {
  border: 1px solid rgba(255, 225, 205, 0.16);
  background: rgba(255,255,255,0.04);
  color: #ffe7d6;
}

/* ===== 与主应用一致的科幻增强：LOGO、浮旋装置、全息标题、卡片/按钮扫光 ===== */
.holo-title {
  background: linear-gradient(120deg, var(--accent-1), var(--accent-3) 46%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 20px rgba(var(--glow-b), 0.35));
}

.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand-logo {
  width: 2.4rem; height: 2.4rem; flex: 0 0 auto;
  filter: drop-shadow(0 0 10px rgba(var(--glow-a), 0.55));
}
.brand-logo .lg-planet { fill: url(#brandCore); }
.brand-logo .lg-ring { fill: none; stroke: rgba(var(--glow-a), 0.85); stroke-width: 1.4; }
.brand-logo .lg-ring2 { fill: none; stroke: rgba(var(--glow-c), 0.7); stroke-width: 1; stroke-dasharray: 3 5; }
.brand-logo .lg-orbit { transform-box: view-box; transform-origin: 32px 32px; animation: spin calc(9s * var(--motion-factor)) linear infinite; }
.brand-logo .lg-moon { fill: var(--accent-3); }
.brand-logo .lg-spark { fill: #fff; opacity: 0.9; animation: twinkle calc(3s * var(--motion-factor)) ease-in-out infinite; }

.orbitals { position: fixed; inset: 0; pointer-events: none; z-index: 1; overflow: hidden; }
.orbital { position: absolute; opacity: 0.5; mix-blend-mode: screen; filter: drop-shadow(0 0 10px rgba(var(--glow-a), 0.35)); }
.orbital .spin { transform-box: fill-box; transform-origin: center; }
.orbital .ring { fill: none; stroke: rgba(var(--glow-a), 0.55); stroke-width: 1.2; }
.orbital .ring-dash { fill: none; stroke: rgba(var(--glow-c), 0.5); stroke-width: 1; stroke-dasharray: 4 6; }
.orbital .node { fill: var(--accent-1); }
.orbital .node2 { fill: var(--accent-3); }
.orbital .core { fill: rgba(var(--glow-b), 0.35); stroke: rgba(var(--glow-a), 0.6); stroke-width: 1; }
.orb-a { top: 12%; left: 4%; width: 120px; height: 120px; animation: floatY calc(13s * var(--motion-factor)) ease-in-out infinite alternate; }
.orb-a .spin { animation: spin calc(22s * var(--motion-factor)) linear infinite; }
.orb-b { bottom: 10%; right: 6%; width: 140px; height: 140px; animation: floatY calc(16s * var(--motion-factor)) ease-in-out infinite alternate; }
.orb-b .spin { animation: spin calc(28s * var(--motion-factor)) linear infinite reverse; }

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes floatY { 0% { transform: translateY(0); } 100% { transform: translateY(-20px); } }

.glass::after {
  content: ""; position: absolute; top: 0; left: -65%; width: 55%; height: 100%;
  background: linear-gradient(115deg, transparent, rgba(255,255,255,0.16), transparent);
  transform: skewX(-18deg); transition: left 0.6s ease; pointer-events: none;
}
.glass:hover::after { left: 125%; }

.btn-main { position: relative; overflow: hidden; }
.btn-main::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, transparent 35%, rgba(255,255,255,0.4) 50%, transparent 65%);
  transform: translateX(-130%); transition: transform 0.6s ease; pointer-events: none;
}
.btn-main:hover::after { transform: translateX(130%); }

/* ===== 季节 / 极光 天气特效层（与主应用一致，由 index-scene.js 注入粒子） ===== */
.weather-fx { position: fixed; inset: 0; pointer-events: none; z-index: 1; overflow: hidden; }
.fx { position: absolute; line-height: 1; will-change: transform; }
.fx-fall {
  top: -8%; font-size: var(--size, 18px); opacity: 0;
  filter: drop-shadow(0 0 5px rgba(var(--glow-a), 0.4));
  animation: fxFall calc(var(--dur, 11s) * var(--motion-factor)) linear infinite;
  animation-delay: var(--delay, 0s);
}
@keyframes fxFall {
  0% { transform: translate3d(0, -10vh, 0) rotate(0deg); opacity: 0; }
  8% { opacity: 0.95; }
  92% { opacity: 0.9; }
  100% { transform: translate3d(var(--drift, 30px), 112vh, 0) rotate(var(--rot, 360deg)); opacity: 0; }
}
.fx-snow { mix-blend-mode: screen; }
.fx-rise {
  bottom: -4%; width: var(--size, 6px); height: var(--size, 6px); border-radius: 50%;
  background: rgba(var(--glow-c), 0.95);
  box-shadow: 0 0 10px rgba(var(--glow-c), 0.9), 0 0 18px rgba(var(--glow-b), 0.5);
  opacity: 0;
  animation: fxRise calc(var(--dur, 12s) * var(--motion-factor)) linear infinite, fxFlick calc(2.4s * var(--motion-factor)) ease-in-out infinite;
  animation-delay: var(--delay, 0s);
}
@keyframes fxRise {
  0% { transform: translate3d(0, 0, 0); opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 0.8; }
  100% { transform: translate3d(var(--drift, 30px), -112vh, 0); opacity: 0; }
}
@keyframes fxFlick { 0%, 100% { opacity: 0.3; } 50% { opacity: 1; } }
.fx-meteor {
  left: -14%; width: var(--size, 200px); height: 2px; border-radius: 999px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.96));
  filter: drop-shadow(0 0 8px rgba(var(--glow-a), 0.9)); opacity: 0;
  animation: fxMeteor calc(var(--dur, 7s) * var(--motion-factor)) linear infinite;
  animation-delay: var(--delay, 0s);
}
@keyframes fxMeteor {
  0% { transform: translate(0, 0) rotate(18deg); opacity: 0; }
  4% { opacity: 1; }
  26% { transform: translate(132vw, 44vh) rotate(18deg); opacity: 0; }
  100% { opacity: 0; }
}
/* 极光场景：登录页的极光层类名是 .aurora，这里单独增强它。 */
html[data-scene="aurora"] .aurora { filter: blur(62px) saturate(1.35) brightness(1.18); }

@media (max-width: 768px) { .orbital, .fx-meteor { display: none; } }
@media (prefers-reduced-motion: reduce) {
  .orbital, .orbital .spin, .brand-logo .lg-orbit, .brand-logo .lg-spark, .fx { animation: none !important; }
}