/* ============================================================
   anam · 设计令牌(紫罗兰系) — 派生自 docs/design/anam-ds/tokens
   品牌名 anam(永远小写)。渐变只给主操作,禁大面积铺。
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600&family=Noto+Sans+SC:wght@400;500;700;900&family=Fraunces:opsz,wght@9..144,600;9..144,700&family=Noto+Serif+SC:wght@700;900&display=swap');

:root {
  /* ---- 品牌紫梯 ---- */
  --violet-50:  #F3EFFF;
  --violet-100: #E8DEFF;
  --violet-200: #D4C2FF;
  --violet-300: #B89BFF;
  --violet-400: #9B6BFF;
  --violet-500: #7C5CFC;
  --violet-600: #6D4AFF;  /* 核心品牌色 */
  --violet-700: #5733E6;
  --violet-800: #4426B4;
  --violet-900: #2F1A7A;

  /* ---- 中性色(2026-06-13 高端化重调:去紫调,近中性,大面积中性+紫只在刀刃) ---- */
  --ink-900: #18181B;
  --ink-800: #27272A;
  --ink-700: #3F3F46;
  --ink-600: #52525B;
  --ink-500: #71717A;
  --ink-400: #A1A1AA;
  --ink-300: #D4D4D8;
  --ink-200: #E4E4E7;
  --ink-100: #F0F0F2;
  --ink-50:  #FAFAFA;
  --white:   #FFFFFF;

  /* ---- 面(底色弃薰衣草,近白) ---- */
  --lavender:   #FAFAF9;
  --lavender-2: #F4F4F2;
  --cream:      #F8F6F1;
  --cream-2:    #F2EFE6;

  /* ---- hero 弥散光(原粉彩 blob 退役,改极淡紫 aurora) ---- */
  --blob-pink:   #EFE9FF;
  --blob-mint:   #F2F0FA;
  --blob-peach:  #F5F1FF;
  --blob-blue:   #ECEAF8;
  --blob-violet: #E4D9FF;

  /* ---- 状态 ---- */
  --success: #2FB67A;
  --warning: #F2A33C;
  --danger:  #F0544F;

  /* ---- 主操作纯色化(2026 主流:渐变退役,CTA 实心品牌紫;token 保名兼容) ---- */
  --grad-violet: var(--violet-600);
  --grad-wonder: var(--violet-500);

  /* ---- 阴影(中性黑,弃紫调,强度减半) ---- */
  --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.09);
  --shadow-brand: 0 6px 18px rgba(109, 74, 255, 0.22);

  /* ---- 字体(display=杂志感衬线,只给大标题/金句) ---- */
  --font-sans: "Plus Jakarta Sans", "Noto Sans SC", -apple-system, "PingFang SC", sans-serif;
  --font-display: "Fraunces", "Noto Serif SC", "Songti SC", Georgia, serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;

  /* ---- 动效 ---- */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---- 基础 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--lavender);
  color: var(--ink-900);
  font-family: var(--font-sans);
  font-size: 16px; line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--violet-100); }
button { font-family: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }
img { display: block; }

/* ---- 通用组件 ---- */
.btn-primary {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--violet-600);
  color: #fff; font-size: 15px; font-weight: 700;
  border: 0; border-radius: 999px;
  padding: 12px 24px;
  box-shadow: var(--shadow-brand);
  transition: transform 0.2s var(--ease-out), background 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}
.btn-primary:hover { transform: translateY(-1px); background: var(--violet-700); box-shadow: 0 8px 22px rgba(109, 74, 255, 0.28); }
.btn-ghost {
  display: inline-flex; align-items: center; gap: 6px;
  background: #fff; color: var(--ink-800);
  font-size: 15px; font-weight: 700;
  border: 1.5px solid var(--ink-200); border-radius: 999px;
  padding: 11px 22px;
  transition: all 0.2s var(--ease-out);
}
.btn-ghost:hover { border-color: var(--violet-300); color: var(--violet-700); }

/* 浮动药丸导航 */
.nav {
  position: fixed; top: 18px; left: 50%; transform: translateX(-50%);
  z-index: 50;
  width: min(1160px, calc(100% - 32px));
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-radius: 999px;
  padding: 12px 14px 12px 26px;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.07);
  transition: box-shadow 0.25s var(--ease-out);
}
.nav.scrolled { box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1); }
.nav .logo img { height: 30px; }
.nav-links { display: flex; gap: 30px; font-size: 15px; font-weight: 700; color: var(--ink-600); }
.nav-links a { transition: color 0.2s var(--ease-out); }
.nav-links a:hover, .nav-links a.active { color: var(--violet-700); }
.nav-right { display: flex; align-items: center; gap: 10px; }
.btn-login { background: transparent; border: 0; font-size: 15px; font-weight: 700; color: var(--ink-600); padding: 12px 14px; }
.btn-login:hover { color: var(--ink-900); }

/* 滚动渐显 */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.reveal.in { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* 入场 */
@keyframes rise { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
.rise { opacity: 0; animation: rise 0.8s var(--ease-out) forwards; }
.d1 { animation-delay: 0.05s; } .d2 { animation-delay: 0.15s; }
.d3 { animation-delay: 0.25s; } .d4 { animation-delay: 0.35s; } .d5 { animation-delay: 0.45s; }