/* momo soul — 共享设计 token（玻璃 / 流光 / 现代）单一来源
 * 由 index.html 与 platform.html 通过 <link> 引用。
 * 页面内仅保留组件级样式，不得重复定义以下 token。
 */

:root {
    --bg: #eef1f8;
    --text: #1f2330;
    --text-sec: #5b6172;
    --text-ter: #8b90a0;
    --accent: #6366f1;
    --accent-hover: #4f51e0;
    --accent-soft: rgba(99, 102, 241, 0.12);
    --success: #0a7d54;
    --focus-ring: #6366f1;
    --glass-bg: rgba(255, 255, 255, 0.55);
    --glass-bg-strong: rgba(255, 255, 255, 0.74);
    --glass-border: rgba(255, 255, 255, 0.65);
    --glass-shadow: 0 8px 32px rgba(80, 80, 160, 0.12);
    --frost: rgba(255, 255, 255, 0.22);
    --radius: 22px;
    --radius-sm: 14px;
    --aurora-1: #8ab4ff;
    --aurora-2: #c4b5fd;
    --aurora-3: #7defff;
    --aurora-4: #fbcfe8;
}

[data-theme="dark"] {
    --bg: #0a0c18;
    --text: #eef0f7;
    --text-sec: #a6abc0;
    --text-ter: #6b7080;
    --accent: #8b9bff;
    --accent-hover: #a9b4ff;
    --accent-soft: rgba(139, 155, 255, 0.16);
    --success: #4ade80;
    --focus-ring: #8b9bff;
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-bg-strong: rgba(255, 255, 255, 0.10);
    --glass-border: rgba(255, 255, 255, 0.14);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.40);
    --frost: rgba(255, 255, 255, 0.04);
    --aurora-1: #4f5bff;
    --aurora-2: #a855f7;
    --aurora-3: #22d3ee;
    --aurora-4: #ec4899;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "PingFang SC", "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    overflow-x: hidden;
}

/* 动态流光背景（连续流动，非离散光斑） */
.aurora {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.aurora::before, .aurora::after {
    content: "";
    position: absolute;
    inset: -30%;
    background: linear-gradient(120deg,
        var(--aurora-1), var(--aurora-2), var(--aurora-3), var(--aurora-4), var(--aurora-1));
    background-size: 280% 280%;
    filter: blur(72px);
    opacity: 0.7;
}
.aurora::before { animation: auroraFlow 22s ease-in-out infinite; }
.aurora::after {
    background: linear-gradient(60deg,
        var(--aurora-3), var(--aurora-1), var(--aurora-4), var(--aurora-2), var(--aurora-3));
    background-size: 320% 320%;
    opacity: 0.45;
    animation: auroraFlow 32s ease-in-out infinite reverse;
}

@keyframes auroraFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 跳转链接（无障碍） */
.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--glass-bg-strong);
    color: var(--text);
    padding: 10px 16px;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    z-index: 1000;
    text-decoration: none;
    font-size: 14px;
}
.skip-link:focus { left: 16px; top: 16px; }

/* 焦点可见性（WCAG 2.4.7） */
a:focus-visible, button:focus-visible, input:focus-visible, .btn:focus-visible {
    outline: 2px solid var(--focus-ring);
    outline-offset: 2px;
}

/* 入场显隐（仅 JS 启用时隐藏，避免无脚本时内容不可见） */
.reveal { opacity: 1; }
.js .reveal {
    opacity: 0;
    transform: translateY(26px);
    transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
}
.js .reveal.in { opacity: 1; transform: none; }

/* 玻璃工具类 */
.glass {
    background: var(--glass-bg);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    backdrop-filter: blur(24px) saturate(180%);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius);
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
    .aurora::before, .aurora::after { animation: none !important; }
    .js .reveal { opacity: 1 !important; transform: none !important; }
}