/* ══════════════════════════════════════════════════════════════
   Anji — 设计系统
   视觉规范克隆自 lingjing.uumit.com（实测计算样式采样）
     · 深色电影感底    #070b12 / #0f1620 / #081019
     · 全圆角胶囊      999px 按钮 / 24px 卡片 / 28px 输入框
     · 大号白色标题    74px/600 H1 · 54px/700 H2
     · 暖橙主色        #ff6b1a（作品/主行动）· 青蓝辅光 #4ecdc4
     · 字体族          "Microsoft YaHei", "PingFang SC"
   ══════════════════════════════════════════════════════════════ */

/* ────────── 1. 令牌 ────────── */
:root {
  /* 底色层次 */
  --bg:          #070b12;
  --bg-2:        #0b111a;
  --surface:     #0f1620;
  --surface-2:   #141d29;
  --surface-3:   #1b2532;
  --card:        #081019;

  /* 描边 */
  --line:        rgba(255,255,255,.08);
  --line-2:      rgba(255,255,255,.14);
  --line-3:      rgba(255,255,255,.22);

  /* 文字 */
  --text:        #ffffff;
  --text-2:      #e9edf3;
  --text-3:      #a8b3c2;
  --text-4:      #6b7889;

  /* 强调 */
  --accent:      #ff6b1a;
  --accent-2:    #ff8c42;
  --accent-soft: rgba(255,107,26,.14);
  --cyan:        #4ecdc4;
  --cyan-2:      #6fe3da;
  --cyan-soft:   rgba(78,205,196,.14);

  /* 语义色 */
  --ok:          #34d399;
  --warn:        #fbbf24;
  --err:         #f87171;

  /* 圆角 */
  --radius-sm:   12px;
  --radius:      20px;
  --radius-lg:   24px;
  --radius-xl:   28px;
  --pill:        999px;

  /* 阴影 */
  --shadow-sm:   0 2px 8px rgba(0,0,0,.2);
  --shadow:      0 10px 30px rgba(0,0,0,.28);
  --shadow-lg:   0 22px 56px rgba(0,0,0,.36);
  --shadow-glow: 0 0 0 1px var(--line-2), 0 10px 30px rgba(0,0,0,.3);

  /* 动效 */
  --ease:        cubic-bezier(.22, 1, .36, 1);
  --ease-out:    cubic-bezier(.16, 1, .3, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
  --dur-fast:    .14s;
  --dur:         .24s;
  --dur-slow:    .42s;
  --dur-slower:  .7s;

  /* 布局 */
  --rail-w:      68px;
  --topbar-h:    64px;
  --page-max:    1240px;

  --font: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB",
          -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", Consolas, monospace;
}

/* ────────── 2. 基础复位 ────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, video, canvas, svg { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.25; letter-spacing: -.02em; }
code { font-family: var(--mono); }

::selection { background: var(--accent); color: #fff; }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(255,255,255,.12);
  border-radius: var(--pill);
  border: 2px solid var(--bg);
}
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,.22); }

/* ────────── 3. 焦点与交互基线 ────────── */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}
button { -webkit-tap-highlight-color: transparent; cursor: pointer; }
button:disabled { cursor: not-allowed; }

button, a, .chip, .case-card, .rail-btn, .mode-tab, .tab, input, textarea, select {
  transition:
    background-color var(--dur) var(--ease),
    border-color     var(--dur) var(--ease),
    color            var(--dur) var(--ease),
    box-shadow       var(--dur) var(--ease),
    transform        var(--dur-fast) var(--ease),
    opacity          var(--dur) var(--ease);
}

/* ────────── 4. 通用组件 ────────── */

/* 主按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 22px;
  border: 0; border-radius: var(--pill);
  font-size: 14px; font-weight: 650; white-space: nowrap;
  background: var(--surface-3); color: var(--text-2);
  cursor: pointer;
}
.btn:hover { background: #232e3d; color: #fff; transform: translateY(-1px); }
.btn:active { transform: scale(.97); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 8px 22px rgba(255,107,26,.3);
}
.btn-primary:hover {
  background: linear-gradient(135deg, var(--accent-2), var(--accent));
  box-shadow: 0 12px 30px rgba(255,107,26,.42);
  transform: translateY(-2px);
}
.btn-ghost { background: transparent; border: 1px solid var(--line-2); color: var(--text-3); }
.btn-ghost:hover { background: rgba(255,255,255,.05); border-color: var(--line-3); color: #fff; }
.btn-sm { height: 36px; padding: 0 16px; font-size: 13px; }
.btn-lg { height: 52px; padding: 0 30px; font-size: 15px; }
.btn-block { width: 100%; }

/* 图标按钮 */
.icon-btn {
  display: grid; place-items: center;
  width: 40px; height: 40px;
  border: 0; border-radius: var(--pill);
  background: transparent; color: var(--text-3); cursor: pointer;
}
.icon-btn:hover { background: rgba(255,255,255,.07); color: #fff; }
.icon-btn:active { transform: scale(.92); }

/* 输入 */
.field {
  width: 100%; height: 48px; padding: 0 18px;
  background: rgba(255,255,255,.04);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  color: var(--text); font-size: 15px;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field::placeholder { color: var(--text-4); }
.field:hover { border-color: var(--line-3); }
.field:focus {
  outline: none;
  border-color: var(--accent);
  background: rgba(255,107,26,.05);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.label { display: block; margin-bottom: 8px; font-size: 13px; font-weight: 600; color: var(--text-3); }

/* 胶囊标签 */
.pill {
  display: inline-flex; align-items: center; gap: 6px;
  height: 26px; padding: 0 11px;
  border-radius: var(--pill);
  background: rgba(255,255,255,.06);
  border: 1px solid var(--line);
  font-size: 12px; font-weight: 600; color: var(--text-3);
  white-space: nowrap;
}
.pill.accent { background: var(--accent-soft); border-color: rgba(255,107,26,.3); color: var(--accent-2); }
.pill.cyan   { background: var(--cyan-soft);   border-color: rgba(78,205,196,.3); color: var(--cyan); }
.pill.ok     { background: rgba(52,211,153,.14); border-color: rgba(52,211,153,.3); color: var(--ok); }

/* 卡片 */
.panel {
  background: linear-gradient(180deg, rgba(20,29,41,.72), rgba(15,22,32,.72));
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(16px);
}

/* 分隔线 */
.hr { height: 1px; background: var(--line); border: 0; margin: 20px 0; }

/* ────────── 5. 背景装饰 ────────── */
.bg-glow {
  position: fixed; inset: 0; z-index: -1; pointer-events: none; overflow: hidden;
}
.bg-glow::before,
.bg-glow::after {
  content: ''; position: absolute; border-radius: 50%; filter: blur(120px); opacity: .5;
}
.bg-glow::before {
  width: 620px; height: 620px; top: -220px; left: -140px;
  background: radial-gradient(circle, rgba(255,107,26,.20), transparent 70%);
}
.bg-glow::after {
  width: 700px; height: 700px; bottom: -300px; right: -180px;
  background: radial-gradient(circle, rgba(78,205,196,.16), transparent 70%);
}
.bg-grid {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.022) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 40%, transparent 100%);
}

/* ────────── 6. 顶栏 ────────── */
.topbar {
  position: sticky; top: 0; z-index: 100;
  display: flex; align-items: center; gap: 16px;
  height: var(--topbar-h); padding: 0 24px;
  background: rgba(7,11,18,.72);
  backdrop-filter: blur(20px) saturate(150%);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; letter-spacing: -.01em; }
.brand-mark {
  display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--cyan));
  color: #fff; font-size: 15px; font-weight: 800;
  box-shadow: 0 4px 12px rgba(255,107,26,.3);
}
.brand-sub { font-size: 11px; font-weight: 500; color: var(--text-4); letter-spacing: .04em; }
.topbar-nav { display: flex; align-items: center; gap: 4px; margin-left: 18px; }
.topbar-nav a {
  padding: 8px 14px; border-radius: var(--pill);
  font-size: 14px; color: var(--text-3); font-weight: 550;
}
.topbar-nav a:hover { background: rgba(255,255,255,.06); color: #fff; }
.topbar-nav a.active { background: rgba(255,255,255,.08); color: #fff; }
.topbar-right { display: flex; align-items: center; gap: 10px; margin-left: auto; }

/* ────────── 7. 提示条 ────────── */
.toast-wrap {
  position: fixed; top: 88px; left: 50%; transform: translateX(-50%);
  z-index: 400; display: flex; flex-direction: column; gap: 10px; align-items: center;
  pointer-events: none;
}
.toast {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 20px; max-width: min(92vw, 460px);
  border-radius: var(--pill);
  background: rgba(30,38,48,.96);
  border: 1px solid var(--line-2);
  color: #fff; font-size: 13.5px; font-weight: 550;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(14px);
  cursor: pointer; pointer-events: auto;
  opacity: 0; transform: translateY(12px) scale(.95);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease-spring);
}
.toast.in { opacity: 1; transform: none; }
.toast-ico {
  display: grid; place-items: center; flex: none;
  width: 19px; height: 19px; border-radius: 50%;
  font-size: 11px; font-weight: 800; font-style: normal;
}
.toast.err { background: rgba(69,26,26,.97); border-color: rgba(248,113,113,.42); }
.toast.err .toast-ico { background: rgba(248,113,113,.2); color: var(--err); }
.toast.ok .toast-ico { background: rgba(52,211,153,.2); color: var(--ok); }

/* ────────── 8. 模态 ────────── */
.modal-mask {
  position: fixed; inset: 0; z-index: 300;
  display: flex; align-items: center; justify-content: center; padding: 20px;
  background: rgba(4,7,12,.76); backdrop-filter: blur(8px);
  opacity: 0; pointer-events: none;
  transition: opacity var(--dur) var(--ease);
}
.modal-mask.show { opacity: 1; pointer-events: auto; }
.modal {
  width: 100%; max-width: 440px;
  background: linear-gradient(180deg, #141d29, #0f1620);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  transform: translateY(18px) scale(.96);
  transition: transform var(--dur-slow) var(--ease-spring);
}
.modal-mask.show .modal { transform: none; }
.modal-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 22px; border-bottom: 1px solid var(--line);
}
.modal-head h3 { font-size: 17px; font-weight: 700; }
.modal-close {
  display: grid; place-items: center;
  width: 32px; height: 32px; border: 0; border-radius: var(--pill);
  background: transparent; color: var(--text-4); font-size: 15px;
}
.modal-close:hover { background: rgba(255,255,255,.08); color: #fff; transform: rotate(90deg); }
.modal-body { padding: 22px; display: flex; flex-direction: column; gap: 16px; }
.modal-foot {
  display: flex; gap: 10px; justify-content: flex-end;
  padding: 18px 22px; border-top: 1px solid var(--line);
}
.modal-hint { font-size: 13px; color: var(--text-4); line-height: 1.7; }

/* ────────── 9. 加载与进度 ────────── */
.progress-bar {
  height: 6px; border-radius: var(--pill);
  background: rgba(255,255,255,.07); overflow: hidden;
}
.progress-fill {
  height: 100%; width: 0; border-radius: var(--pill);
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width .6s var(--ease-out);
}
.progress-fill.indeterminate {
  width: 38% !important;
  background: linear-gradient(90deg, transparent, var(--accent), var(--cyan), transparent);
  background-size: 220% 100%;
  animation: flow 1.5s linear infinite;
}
@keyframes flow {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(280%); }
}
.progress-fill.canceled { background: var(--text-4) !important; animation: none; }
.progress-timer {
  margin-top: 10px; font-size: 12px; color: var(--text-4);
  font-family: var(--mono); font-variant-numeric: tabular-nums;
}

.spinner {
  width: 18px; height: 18px; flex: none;
  border: 2px solid rgba(255,255,255,.25);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.skeleton {
  background: linear-gradient(90deg, rgba(255,255,255,.05) 25%, rgba(255,255,255,.1) 37%, rgba(255,255,255,.05) 63%);
  background-size: 400% 100%;
  animation: shimmer 1.4s ease infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer {
  0% { background-position: 100% 0; }
  100% { background-position: -100% 0; }
}

/* ────────── 10. 入场动效 ────────── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes cardIn { from { opacity: 0; transform: translateY(14px) scale(.985); } to { opacity: 1; transform: none; } }
@keyframes popIn  { from { opacity: 0; transform: scale(.94); } to { opacity: 1; transform: none; } }

.anim-up  { animation: fadeUp var(--dur-slower) var(--ease-out) both; }
.anim-in  { animation: fadeIn var(--dur-slower) var(--ease-out) both; }
.anim-card{ animation: cardIn var(--dur-slow) var(--ease-out) both; }

/* 逐项延迟 */
.d1 { animation-delay: .06s; } .d2 { animation-delay: .12s; }
.d3 { animation-delay: .18s; } .d4 { animation-delay: .24s; }
.d5 { animation-delay: .30s; } .d6 { animation-delay: .36s; }

/* 滚动进入视口才播放（JS 加 .reveal-in） */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity var(--dur-slower) var(--ease-out), transform var(--dur-slower) var(--ease-out); }
.reveal.reveal-in { opacity: 1; transform: none; }

/* 顶部生成进度线 */
body.is-busy::before {
  content: ''; position: fixed; top: 0; left: 0; right: 0; height: 2px; z-index: 9999;
  background: linear-gradient(90deg, transparent, var(--accent), var(--cyan), transparent);
  background-size: 200% 100%;
  animation: topbarRun 1.4s linear infinite;
}
@keyframes topbarRun {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ────────── 11. 工具类 ────────── */
.container { width: 100%; max-width: var(--page-max); margin: 0 auto; padding: 0 24px; }
.muted { color: var(--text-3); }
.dim { color: var(--text-4); }
.center { text-align: center; }
.row { display: flex; align-items: center; gap: 12px; }
.col { display: flex; flex-direction: column; }
.spacer { flex: 1; }
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ────────── 12. 无障碍 ────────── */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .progress-fill.indeterminate { width: 60% !important; }
}

/* ────────── 13. 响应式 ────────── */
@media (max-width: 900px) {
  :root { --topbar-h: 58px; --page-max: 100%; }
  .container { padding: 0 18px; }
  .topbar { padding: 0 16px; gap: 10px; }
  .topbar-nav { display: none; }
  .toast-wrap { top: 72px; left: 12px; right: 12px; transform: none; }
  .toast { width: 100%; max-width: none; justify-content: center; }
}
@media (max-width: 560px) {
  body { font-size: 15px; }
  .container { padding: 0 14px; }
  .btn { height: 42px; padding: 0 18px; }
  .modal { max-width: 100%; }
}