/* ==================== FusionRelay · Premium 设计系统 ==================== */
/* 设计语言：暖极简（Notion 式排版）+ 柔光渐变氛围 + 玻璃顶栏 + 黑色主按钮
   排版：大标题紧字距（-0.04em），四档字重；边框是耳语（1px rgba(0,0,0,.08)）；
   阴影多层、单层透明度≤0.06，像自然光而不是描边。 */
:root {
  --ink: rgba(0, 0, 0, 0.92);            /* 近黑，不纯黑 */
  --ink-2: #6f6a63;                       /* 暖灰 500 */
  --ink-3: #a8a29a;                       /* 暖灰 300 */
  --line: rgba(0, 0, 0, 0.08);            /* 耳语边框 */
  --line-strong: rgba(0, 0, 0, 0.14);
  --bg: #fcfcfa;                          /* 暖白画布 */
  --warm: #f6f5f2;                        /* 暖白区块 */
  --card: #ffffff;
  --amber: #d97706;                       /* 琥珀·点缀专用 */
  --amber-soft: #fef7ec;
  --green: #16a34a;
  --red: #dc2626;
  --radius: 14px;
  --shadow-card: 0 1px 2px rgba(23, 23, 23, .04), 0 8px 24px rgba(23, 23, 23, .05);
  --shadow-lift: 0 2px 4px rgba(23, 23, 23, .05), 0 16px 40px rgba(23, 23, 23, .09);
  --shadow-btn: 0 8px 20px rgba(23, 23, 23, .18), 0 2px 6px rgba(23, 23, 23, .12);
  --ease: cubic-bezier(.22, .61, .36, 1);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body {
  font-family: -apple-system, "PingFang SC", "Segoe UI", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--ink); font-size: 15px; line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; font-size: 14px; color: var(--ink); }
::selection { background: #fde8c8; }

/* ---------- 顶栏：玻璃拟态 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(252, 252, 250, 0.78);
  backdrop-filter: blur(18px) saturate(1.4);
  -webkit-backdrop-filter: blur(18px) saturate(1.4);
  border-bottom: 1px solid var(--line);
  display: flex; align-items: center; gap: 20px;
  padding: 0 28px; height: 60px;
}
.logo { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 15.5px; letter-spacing: -0.01em; }
.logo .mark {
  width: 27px; height: 27px; border-radius: 8px;
  background: linear-gradient(135deg, #fbbf24 0%, #f97316 55%, #ef4444 100%);
  box-shadow: inset 0 1px 1px rgba(255,255,255,.5), 0 2px 6px rgba(249,115,22,.35);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 12px; font-weight: 800;
}
.nav { display: flex; gap: 2px; flex: 1; }
.nav a {
  padding: 7px 13px; border-radius: 9px; color: var(--ink-2); font-weight: 500; font-size: 14px;
  transition: all .18s var(--ease);
}
.nav a:hover { background: rgba(0,0,0,.045); color: var(--ink); }
.nav a.active { background: rgba(0,0,0,.06); color: var(--ink); font-weight: 600; }
.top-right { display: flex; align-items: center; gap: 10px; }
.credits-pill {
  display: flex; align-items: center; gap: 6px;
  background: var(--amber-soft); color: #92400e;
  border: 1px solid #f5e0bb; border-radius: 999px; padding: 4px 13px; font-weight: 600; font-size: 13px;
}
.avatar-btn {
  width: 33px; height: 33px; border-radius: 50%;
  background: linear-gradient(135deg, #3f3f46, #18181b);
  color: #fff; font-weight: 700; border: none; font-size: 13px;
  box-shadow: 0 2px 6px rgba(0,0,0,.18);
}
img.avatar-btn { object-fit: cover; cursor: pointer; border: 1.5px solid rgba(0,0,0,.08); }

/* ---------- 个人资料弹窗 ---------- */
.profile-modal { width: 460px; }
.profile-body { display: flex; gap: 22px; margin-top: 20px; }
.avatar-wrap {
  display: flex; flex-direction: column; align-items: center; flex-shrink: 0;
  width: 120px; text-align: center;
}
.avatar-wrap img, .avatar-big {
  width: 84px; height: 84px; border-radius: 50%; object-fit: cover;
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
.avatar-big {
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #3f3f46, #18181b);
  color: #fff; font-size: 34px; font-weight: 700;
}
.profile-body input {
  width: 100%; padding: 9px 12px; border: 1px solid var(--line); border-radius: 10px;
  font-size: 14px; background: #fff; color: var(--ink); outline: none;
}
.profile-body input:focus { border-color: var(--accent); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  border: 1px solid var(--line-strong); background: #fff; color: var(--ink);
  border-radius: 11px; padding: 9px 18px; font-weight: 600; font-size: 14px;
  transition: all .18s var(--ease);
}
.btn:hover { border-color: rgba(0,0,0,.3); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(23,23,23,.08); }
.btn-primary {
  background: linear-gradient(180deg, #2b2b2e, #141416);
  border: 1px solid #101012; color: #fff;
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover { filter: brightness(1.18); color: #fff; transform: translateY(-1px); }
.btn-primary:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn-danger { border-color: rgba(220,38,38,.35); color: var(--red); }
.btn-sm { padding: 5px 12px; font-size: 12.5px; border-radius: 9px; }

/* ---------- 容器与卡片 ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 28px 24px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow-card);
}

/* ---------- 徽标 / 标签 ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 4px; padding: 2px 9px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600; letter-spacing: 0.02em;
  background: var(--amber-soft); color: #92400e; border: 1px solid #f5e0bb;
}
.tag.gray { background: #f5f4f1; color: var(--ink-2); border-color: var(--line); }
.tag.green { background: #effaf1; color: var(--green); border-color: #cdeed5; }
.tag.red { background: #fef1f1; color: var(--red); border-color: #f8d7d7; }
.muted { color: var(--ink-2); }
.danger-text { color: var(--red); font-weight: 600; }

/* ---------- 表格 ---------- */
table.tbl { width: 100%; border-collapse: collapse; background: #fff; }
table.tbl th, table.tbl td {
  border: 1px solid var(--line); padding: 9px 13px; text-align: left; font-size: 13px;
}
table.tbl th { background: var(--warm); font-weight: 600; white-space: nowrap; color: var(--ink-2); font-size: 12.5px; }
table.tbl tr:hover td { background: #fbfaf7; }

/* ---------- 表单 ---------- */
.field { margin-bottom: 15px; }
.field label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 13px; }
.field input, .field select, .field textarea {
  width: 100%; border: 1px solid var(--line-strong); border-radius: 10px;
  padding: 9px 13px; outline: none; background: #fff;
  transition: border-color .15s, box-shadow .15s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: #18181b; box-shadow: 0 0 0 3px rgba(0,0,0,.07);
}
.field input::placeholder, .field textarea::placeholder { color: var(--ink-3); }

/* ---------- 选择 chip ---------- */
.chip {
  border: 1px solid var(--line-strong); background: #fff; border-radius: 999px;
  padding: 5px 13px; font-size: 12.5px; font-weight: 600; color: var(--ink-2);
  transition: all .15s var(--ease);
}
.chip:hover { border-color: rgba(0,0,0,.3); color: var(--ink); }
.chip.on { background: #18181b; border-color: #18181b; color: #fff; }
.chip:disabled { opacity: .4; cursor: not-allowed; }

/* ---------- Toast ---------- */
#toast {
  position: fixed; top: 74px; left: 50%; transform: translateX(-50%);
  z-index: 999; display: none;
  background: rgba(20,20,22,.94); color: #fff; padding: 11px 20px; border-radius: 12px;
  font-size: 13px; box-shadow: 0 12px 32px rgba(0,0,0,.28); max-width: 80vw;
  backdrop-filter: blur(8px);
}
#toast.err { background: rgba(153, 27, 27, .96); }
#toast.ok { background: rgba(21, 94, 53, .96); }

/* ---------- 模态 ---------- */
.modal-mask {
  position: fixed; inset: 0; background: rgba(20,20,22,.4); z-index: 100;
  backdrop-filter: blur(6px);
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  background: #fff; border-radius: 18px; padding: 26px; width: 440px; max-width: 94vw;
  max-height: 88vh; overflow: auto;
  box-shadow: 0 2px 6px rgba(23,23,23,.06), 0 30px 80px rgba(23,23,23,.22);
}
.modal h3 { margin-bottom: 16px; font-size: 17px; letter-spacing: -0.02em; }

/* ---------- 网格 ---------- */
.grid { display: grid; gap: 16px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }

/* ---------- 工具/模型卡片 ---------- */
.model-card, .tool-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; transition: all .22s var(--ease); display: block;
  box-shadow: var(--shadow-card);
}
.model-card:hover, .tool-card:hover {
  border-color: var(--line-strong); box-shadow: var(--shadow-lift); transform: translateY(-3px);
}
.tool-cover { height: 122px; position: relative; }
.tool-cover .tool-tag {
  position: absolute; top: 10px; left: 10px;
  background: rgba(255,255,255,.9); backdrop-filter: blur(6px);
  border-radius: 999px; padding: 2px 10px;
  font-size: 11px; font-weight: 700; color: var(--ink);
}
.tool-body { padding: 15px; }
.tool-body h4 { font-size: 15px; margin-bottom: 4px; letter-spacing: -0.01em; }
.tool-body p { font-size: 12.5px; color: var(--ink-2); min-height: 38px; }
.tool-foot { display: flex; justify-content: space-between; align-items: center; margin-top: 11px; font-size: 12px; }

/* ---------- FAQ ---------- */
.faq-item { border: 1px solid var(--line); border-radius: 12px; background: #fff; margin-bottom: 10px; overflow: hidden; }
.faq-item summary { padding: 15px 18px; cursor: pointer; font-weight: 600; list-style: none; font-size: 14.5px; }
.faq-item summary::after { content: '＋'; float: right; color: var(--ink-3); }
.faq-item[open] summary::after { content: '－'; }
.faq-item .faq-body { padding: 0 18px 15px; color: var(--ink-2); font-size: 13.5px; }

/* ---------- 动效 ---------- */
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: translateY(0); }
}
.rise { animation: rise .8s var(--ease) both; }
.rise-1 { animation-delay: .05s; } .rise-2 { animation-delay: .15s; }
.rise-3 { animation-delay: .25s; } .rise-4 { animation-delay: .38s; }
.rise-5 { animation-delay: .5s; }

footer.site-footer {
  border-top: 1px solid var(--line); margin-top: 72px; padding: 30px 24px;
  text-align: center; color: var(--ink-3); font-size: 12.5px;
}

/* ---------- 应用布局：左侧分组导航 + 主内容 ---------- */
.app-shell { display: flex; min-height: calc(100vh - 60px); }
.sidebar {
  width: 232px; flex-shrink: 0; padding: 18px 14px;
  border-right: 1px solid var(--line);
  background: linear-gradient(180deg, #fdfdfc, #faf9f7);
}
.app-main { flex: 1; min-width: 0; padding: 22px 28px; }
@media (max-width: 900px) {
  .app-shell { flex-direction: column; }
  .sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--line); display: flex; gap: 14px; overflow-x: auto; padding: 12px 16px; }
  .side-group { min-width: 190px; }
}
.side-group {
  border-radius: 13px; padding: 8px; margin-bottom: 10px;
  border: 1px solid transparent;
}
.side-group.active { background: #f6f6f8; border-color: var(--line); }
.side-group-head {
  display: flex; align-items: center; gap: 10px;
  font-size: 15.5px; font-weight: 700; letter-spacing: -0.01em;
  color: var(--ink); padding: 8px 10px;
}
.side-group-head svg { width: 19px; height: 19px; flex-shrink: 0; stroke: var(--ink); }
.side-items { margin-top: 2px; }
.side-item {
  display: block; padding: 8px 10px 8px 41px; border-radius: 9px;
  font-size: 14px; color: var(--ink-2); font-weight: 500;
  transition: all .15s var(--ease);
}
.side-item:hover { background: rgba(0,0,0,.045); color: var(--ink); }
.side-item.active { background: #eef0fe; color: #4c5bd4; font-weight: 600; }
.side-item.soon { position: relative; }
.side-item.soon .soon-tag {
  float: right; font-size: 10px; color: var(--ink-3); font-weight: 600; padding-top: 3px;
}