/* ===== AI工具站 统一基础样式 ===== */
:root{
  --bg:#0a0a0f; --card:#14141f; --card-alt:#161622;
  --border:#1f1f35; --border-focus:rgba(167,139,250,0.4);
  --text:#e8e8f0; --text2:#7c7c9a; --text3:#5a5a72;
  --purple:#a78bfa; --purple-hover:#8b5cf6; --purple-glow:rgba(167,139,250,0.25);
  --green:#34d399; --green-glow:rgba(52,211,153,0.25);
  --orange:#fbbf24; --blue:#60a5fa; --red:#f87171;
  --radius:12px; --radius-sm:8px;
  --font:"-apple-system","BlinkMacSystemFont","Segoe UI","PingFang SC","Microsoft YaHei","sans-serif";
}
*{margin:0;padding:0;box-sizing:border-box}
body{
  background:var(--bg); color:var(--text); font-family:var(--font);
  min-height:100vh; -webkit-font-smoothing:antialiased; line-height:1.5;
}

/* 导航栏 */
.nav{
  background:rgba(20,20,31,0.9); backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border); padding:0 20px;
  display:flex; align-items:center; height:56px; gap:16px;
  position:sticky; top:0; z-index:100;
}
.nav a{color:var(--text2);text-decoration:none;font-size:0.88rem;transition:color .2s}
.nav a:hover{color:var(--text)}
.nav .logo{color:var(--purple);font-weight:700;font-size:1.05rem}
.nav .logo:hover{color:var(--purple-hover)}

/* 容器 */
.container{max-width:900px;margin:0 auto;padding:32px 20px 60px}

/* 标题 */
h1{font-size:1.7rem;font-weight:800;margin-bottom:6px;letter-spacing:-0.01em}
.subtitle{color:var(--text2);font-size:0.88rem;margin-bottom:28px}

/* 卡片 */
.card{
  background:var(--card); border:1px solid var(--border);
  border-radius:var(--radius); padding:20px;
  margin-bottom:20px; transition:border-color .2s;
}
.card:hover{border-color:rgba(167,139,250,0.2)}
.card h3{font-size:0.95rem;font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:8px}

/* 表单 */
.form-group{margin-bottom:12px}
.form-group label{display:block;color:var(--text2);font-size:0.78rem;margin-bottom:4px;font-weight:500}
.form-group input,.form-group textarea,.form-group select{
  width:100%; background:var(--bg); border:1px solid var(--border);
  border-radius:var(--radius-sm); padding:10px 14px;
  color:var(--text); font-size:0.9rem; font-family:var(--font);
  transition:border-color .2s,box-shadow .2s; outline:none;
}
.form-group textarea{resize:vertical;min-height:60px;line-height:1.6}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{
  border-color:var(--purple); box-shadow:0 0 0 3px rgba(167,139,250,0.1);
}

/* 按钮 */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:6px;
  padding:10px 20px; border:none; border-radius:var(--radius-sm);
  font-size:0.9rem; font-weight:600; cursor:pointer;
  transition:all .2s; font-family:var(--font);
}
.btn-primary{background:linear-gradient(135deg,var(--purple),#7c3aed);color:#fff;box-shadow:0 2px 12px rgba(167,139,250,0.25)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px rgba(167,139,250,0.35)}
.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none}
.btn-green{background:var(--green);color:#000;font-weight:700}
.btn-green:hover{opacity:.9}
.btn-outline{background:transparent;border:1px solid var(--border);color:var(--text)}
.btn-outline:hover{border-color:var(--purple)}
.btn-sm{padding:6px 14px;font-size:0.8rem}

/* 上传区 */
.upload-zone{
  border:2px dashed var(--border); border-radius:var(--radius);
  padding:60px 20px; text-align:center; cursor:pointer;
  transition:all .2s; margin-bottom:24px;
}
.upload-zone:hover,.upload-zone.drag-over{
  border-color:var(--purple); background:rgba(167,139,250,0.04);
}
.upload-zone .icon{font-size:3rem;margin-bottom:12px;display:block}
.upload-zone p{color:var(--text2);font-size:0.88rem}
.upload-zone input{display:none}

/* 进度条 */
.progress-wrap{display:none;margin-bottom:20px}
.progress-wrap.active{display:block}
.progress-info{display:flex;justify-content:space-between;margin-bottom:8px;font-size:0.82rem}
.progress-info .status{color:var(--purple)}
.progress-info .pct{color:var(--text2)}
.progress-bar{height:4px;background:var(--border);border-radius:2px;overflow:hidden}
.progress-fill{height:100%;background:linear-gradient(90deg,var(--purple),var(--green));width:0;transition:width .5s}

/* 结果 */
.result{display:none;text-align:center}
.result.active{display:block}
.result img,.result video{max-width:100%;border-radius:var(--radius);margin-bottom:12px}

/* 错误 */
.error-msg{
  background:rgba(248,113,113,.08); border:1px solid rgba(248,113,113,.25);
  border-radius:var(--radius-sm); padding:12px; color:var(--red);
  font-size:0.84rem; margin-bottom:20px; display:none; line-height:1.6;
}
.error-msg.active{display:block}

/* 状态栏 */
.status-bar{display:none;align-items:center;gap:10px;padding:16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:20px}
.status-bar.active{display:flex}
.spinner{width:20px;height:20px;border:2px solid var(--border);border-top-color:var(--purple);border-radius:50%;animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

/* 工具布局 */
.tool-layout{display:grid;grid-template-columns:380px 1fr;gap:24px}
@media(max-width:860px){.tool-layout{grid-template-columns:1fr}}

/* 推荐区 */
.related-tools{margin-top:48px;padding-top:24px;border-top:1px solid var(--border)}
.related-tools h3{font-size:0.95rem;color:var(--text2);margin-bottom:16px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,280px));gap:10px;justify-content:center}
.related-card{background:var(--card);border:1px solid var(--border);border-radius:10px;padding:14px;text-decoration:none;color:var(--text);transition:all .2s;display:flex;align-items:center;gap:10px}
.related-card:hover{border-color:var(--purple);transform:translateY(-2px)}
.related-card .icon{font-size:1.3rem}
.related-card .name{font-size:0.85rem;font-weight:600}
.related-card .arrow{color:var(--text3);font-size:0.8rem;margin-left:auto}

/* 响应式 */
@media(max-width:640px){
  .container{padding:16px 12px 40px}
  h1{font-size:1.35rem}
}