.tts-hero{position:relative;background:#fff;border:1px solid #eef2f6;border-radius:16px;padding:28px 32px;margin-bottom:20px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.02)}
.tts-hero::before{content:'';position:absolute;top:0;left:0;width:3px;height:100%;background:#4a6cf7;opacity:.65;border-radius:16px 0 0 16px}
.tts-hero-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.tts-hero-left{display:flex;align-items:center;gap:18px;flex:1;min-width:260px}
.tts-hero-icon{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,#eef2ff,#e0e7ff);color:#4a6cf7;display:flex;align-items:center;justify-content:center;font-size:26px;flex-shrink:0;border:1px solid #d0d9f0}
.tts-hero-text h1{font-size:24px;font-weight:700;color:#1a202c;margin:0 0 6px}
.tts-hero-text p{font-size:14px;color:#718096;margin:0;line-height:1.6}
.tts-hero-btn{background:#4a6cf7;color:#fff;padding:11px 24px;border-radius:10px;text-decoration:none;font-weight:600;font-size:14px;transition:.25s;display:inline-flex;align-items:center;gap:6px;box-shadow:0 2px 8px rgba(74,108,247,.18)}
.tts-hero-btn:hover{background:#3a5cd9;transform:translateY(-2px);color:#fff}

.tts-tabs{display:flex;gap:6px;background:#f1f4f9;border-radius:12px;padding:6px;margin-bottom:20px}
.tts-tab{flex:1;text-align:center;padding:12px 16px;border-radius:9px;font-size:15px;font-weight:500;color:#718096;cursor:pointer;transition:all .25s;user-select:none;display:flex;align-items:center;justify-content:center;gap:8px;border:none;background:transparent;font-family:inherit}
.tts-tab:hover{color:#4a6cf7;background:rgba(74,108,247,.06)}
.tts-tab.active{background:#fff;color:#4a6cf7;box-shadow:0 2px 8px rgba(74,108,247,.12);font-weight:600}

.tts-panel{display:none}
.tts-panel.active{display:block;animation:fadeIn .3s ease}
@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}

.tts-card{background:#fff;border-radius:16px;border:1px solid #eef2f6;padding:24px 28px;margin-bottom:20px;box-shadow:0 1px 4px rgba(0,0,0,.02)}
.tts-card-title{font-size:16px;font-weight:600;color:#1a202c;margin-bottom:18px;display:flex;align-items:center;gap:8px}
.tts-card-title i{color:#4a6cf7;background:rgba(74,108,247,.1);padding:6px 8px;border-radius:8px;font-size:18px}

.tts-textarea{width:100%;min-height:120px;padding:14px 18px;border:1.5px solid #e2e8f0;border-radius:12px;font-size:15px;line-height:1.8;color:#2d3748;background:#f7fafc;outline:none;resize:vertical;font-family:inherit;transition:.2s;box-sizing:border-box}
.tts-textarea:focus{border-color:#4a6cf7;background:#fff;box-shadow:0 0 0 4px rgba(74,108,247,.08)}
.tts-counter{display:flex;justify-content:space-between;align-items:center;margin-top:6px;font-size:13px;color:#a0aec0}

.tts-voices{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.voice-option{display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 8px;border:2px solid #eef2f6;border-radius:12px;background:#fafbfc;cursor:pointer;transition:.25s;text-align:center}
.voice-option:hover{border-color:#d0d9f0;background:#f0f5ff}
.voice-option.active{border-color:#4a6cf7;background:#f0f5ff;box-shadow:0 4px 12px rgba(74,108,247,.1)}
.voice-option .voice-icon{font-size:24px}
.voice-option .voice-name{font-size:13px;font-weight:600;color:#1a202c}
.voice-option .voice-desc{font-size:11px;color:#a0aec0}

.btn-generate{display:inline-flex;align-items:center;gap:8px;padding:14px 48px;background:linear-gradient(135deg,#4a6cf7,#6a8cff);color:#fff;border:none;border-radius:12px;font-size:17px;font-weight:600;cursor:pointer;transition:.3s;box-shadow:0 4px 16px rgba(74,108,247,.25);font-family:inherit}
.btn-generate:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 8px 28px rgba(74,108,247,.35)}
.btn-generate:disabled{opacity:.6;cursor:not-allowed}
.tts-actions{text-align:center;margin-top:26px}

.tts-result{display:none;margin-top:20px}
.tts-result.active{display:block;animation:fadeIn .3s ease}
.tts-audio-wrapper{background:linear-gradient(135deg,#f8fafc,#f0f5ff);border-radius:14px;border:1px solid #e8edf7;padding:20px 24px}
.tts-audio-wrapper audio{width:100%;border-radius:10px;outline:none}
.tts-download-row{display:flex;gap:10px;margin-top:14px;justify-content:center;flex-wrap:wrap}
.tts-download-row a,.tts-download-row button{display:inline-flex;align-items:center;gap:6px;padding:10px 26px;border-radius:10px;font-size:14px;font-weight:500;text-decoration:none;transition:.25s;border:none;cursor:pointer;font-family:inherit}
.btn-download-audio{background:#38a169;color:#fff}
.btn-download-audio:hover{background:#2f855a;transform:translateY(-2px)}
.btn-regenerate{background:#fff;color:#4a5568;border:1px solid #e2e8f0}
.btn-regenerate:hover{background:#f7fafc;border-color:#4a6cf7;color:#4a6cf7}

.tts-error{display:none;margin-top:16px;padding:12px 18px;background:#fff5f5;border:1px solid #fed7d7;border-radius:10px;color:#c53030;font-size:14px;align-items:center;gap:8px}
.tts-error.active{display:flex}

.tts-tips{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.tts-tip-item{display:flex;align-items:flex-start;gap:12px;padding:16px 18px;background:#f8fafc;border-radius:12px;border:1px solid #eef2f6;transition:.25s}
.tts-tip-item:hover{border-color:#d0d9f0;background:#f0f5ff}
.tts-tip-item .tip-icon{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.tip-icon.blue{background:rgba(74,108,247,.1);color:#4a6cf7}
.tip-icon.green{background:rgba(56,161,105,.1);color:#38a169}
.tip-icon.orange{background:rgba(237,137,54,.1);color:#ed8936}
.tts-tip-item .tip-content strong{display:block;font-size:14px;color:#1a202c;margin-bottom:2px}
.tts-tip-item .tip-content span{display:block;font-size:12.5px;color:#718096;line-height:1.6}
.tts-tip-item .tip-content strong em{color:#4a6cf7;font-style:normal;font-weight:700}

.img-drop-zone{border:2px dashed #d2dce8;border-radius:14px;padding:32px 20px;text-align:center;cursor:pointer;transition:.3s;background:#f8fafc}
.img-drop-zone:hover{border-color:#4a6cf7;background:#f0f5ff}
.img-drop-zone .icon{font-size:40px;color:#4a6cf7;margin-bottom:8px;display:block}
.img-drop-zone .title{font-size:15px;font-weight:600;color:#1a202c}
.img-drop-zone .hint{font-size:13px;color:#a0aec0;margin-top:4px}
.img-drop-zone input[type=file]{display:none}
.img-preview{display:none;margin-top:16px;text-align:center}
.img-preview.active{display:block}
.img-preview img{max-width:100%;max-height:280px;border-radius:12px;border:1px solid #eef2f6;box-shadow:0 2px 12px rgba(0,0,0,.04)}
.img-result-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}
@media (max-width:600px){.img-result-grid{grid-template-columns:1fr}}
.img-result-item{background:#f8fafc;border-radius:12px;padding:14px;border:1px solid #eef2f6;text-align:center}
.img-result-item .label{font-size:12px;color:#a0aec0;margin-bottom:8px;display:block;font-weight:500}
.img-result-item img{max-width:100%;max-height:240px;border-radius:8px}
.img-result-item .meta{font-size:11px;color:#a0aec0;margin-top:6px}

.btn-generate.loading{position:relative;overflow:hidden;pointer-events:none}
.btn-generate.loading::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.35),transparent);animation:btnShine 1.5s ease-in-out infinite}
@keyframes btnShine{to{left:100%}}

.enhance-progress{display:none;margin-top:20px;padding:24px;background:linear-gradient(135deg,#f8fafc,#f0f5ff);border:1px solid #e8edf7;border-radius:14px;text-align:center;animation:fadeIn .3s ease}
.enhance-progress.active{display:block}
.enhance-spinner{position:relative;width:64px;height:64px;margin:0 auto 16px}
.enhance-spinner::before,.enhance-spinner::after{content:'';position:absolute;inset:0;border-radius:50%;border:3px solid transparent}
.enhance-spinner::before{border-top-color:#4a6cf7;border-right-color:#4a6cf7;animation:spin 1s linear infinite}
.enhance-spinner::after{border-bottom-color:#7c3aed;border-left-color:#7c3aed;animation:spin 1.5s linear infinite reverse}
.enhance-spinner i{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:22px;color:#4a6cf7;animation:pulse 1.5s ease-in-out infinite}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulse{0%,100%{opacity:.4;transform:translate(-50%,-50%) scale(.9)}50%{opacity:1;transform:translate(-50%,-50%) scale(1.1)}}
.enhance-progress-text{font-size:15px;font-weight:600;color:#1a202c;margin-bottom:6px;min-height:22px;transition:opacity .3s}
.enhance-progress-sub{font-size:12.5px;color:#a0aec0;margin-bottom:16px}
.enhance-progress-bar{width:100%;height:4px;background:#e8edf7;border-radius:4px;overflow:hidden;position:relative}
.enhance-progress-fill{height:100%;width:0;background:linear-gradient(90deg,#4a6cf7,#7c3aed,#a855f7);border-radius:4px;transition:width .4s ease;position:relative}
.enhance-progress-fill::after{content:'';position:absolute;top:0;right:0;width:80px;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.6));animation:barShine 1.2s ease-in-out infinite}
@keyframes barShine{0%{transform:translateX(-80px);opacity:0}50%{opacity:1}100%{transform:translateX(0);opacity:0}}

.enhance-skeleton{display:none;margin-top:20px}
.enhance-skeleton.active{display:block}
.skeleton-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:600px){.skeleton-grid{grid-template-columns:1fr}}
.skeleton-item{background:#f8fafc;border-radius:12px;padding:14px;border:1px solid #eef2f6}
.skeleton-box{width:100%;height:180px;background:linear-gradient(90deg,#eef2f6 25%,#e2e8f0 37%,#eef2f6 63%);background-size:400% 100%;border-radius:8px;animation:skeletonLoad 1.4s ease infinite}
.skeleton-label{margin-top:10px;height:12px;width:60px;background:linear-gradient(90deg,#eef2f6 25%,#e2e8f0 37%,#eef2f6 63%);background-size:400% 100%;border-radius:4px;animation:skeletonLoad 1.4s ease infinite;margin-left:auto;margin-right:auto}
@keyframes skeletonLoad{0%{background-position:100% 50%}100%{background-position:0 50%}}

.img-result-item img{cursor:zoom-in;transition:transform .25s,box-shadow .25s}
.img-result-item img:hover{transform:scale(1.02);box-shadow:0 8px 24px rgba(74,108,247,.15)}

.img-zoom-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:99999;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);align-items:center;justify-content:center;animation:overlayFadeIn .25s ease}
.img-zoom-overlay.active{display:flex}
@keyframes overlayFadeIn{from{opacity:0}to{opacity:1}}
.img-zoom-stage{position:relative;width:100%;height:100%;display:flex;align-items:center;justify-content:center;overflow:hidden;cursor:grab}
.img-zoom-stage.dragging{cursor:grabbing}
.img-zoom-image{max-width:90vw;max-height:85vh;border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,.5);user-select:none;-webkit-user-drag:none;transform:translate(0,0) scale(1);transition:transform .15s ease;will-change:transform}
.img-zoom-stage.dragging .img-zoom-image{transition:none}
.img-zoom-close{position:fixed;top:20px;right:28px;width:44px;height:44px;border-radius:50%;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.25);color:#fff;font-size:26px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .25s;z-index:100000;backdrop-filter:blur(6px)}
.img-zoom-close:hover{background:rgba(255,255,255,.3);transform:rotate(90deg)}
.img-zoom-toolbar{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);display:flex;align-items:center;gap:6px;background:rgba(0,0,0,.6);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:1px solid rgba(255,255,255,.18);border-radius:40px;padding:6px;z-index:100000;box-shadow:0 8px 32px rgba(0,0,0,.4)}
.img-zoom-btn{width:40px;height:40px;border-radius:50%;background:transparent;border:none;color:#fff;font-size:18px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .2s}
.img-zoom-btn:hover{background:rgba(255,255,255,.18)}
.img-zoom-btn:disabled{opacity:.35;cursor:not-allowed}
.img-zoom-btn:disabled:hover{background:transparent}
.img-zoom-level{color:#fff;font-size:13px;font-weight:600;min-width:56px;text-align:center;letter-spacing:.5px;font-family:'Courier New',monospace}
.img-zoom-caption{position:fixed;top:24px;left:50%;transform:translateX(-50%);color:#fff;font-size:14px;background:rgba(0,0,0,.55);backdrop-filter:blur(8px);padding:6px 18px;border-radius:30px;border:1px solid rgba(255,255,255,.15);letter-spacing:.5px;z-index:100000;white-space:nowrap}
.img-zoom-hint{position:fixed;bottom:88px;left:50%;transform:translateX(-50%);color:rgba(255,255,255,.55);font-size:12px;z-index:100000;white-space:nowrap;pointer-events:none}

body.dark-mode .tts-hero,body.dark-mode .tts-card{background:#16213e;border-color:#2a3a5a}
body.dark-mode .tts-hero-text h1,body.dark-mode .tts-card-title,body.dark-mode .tts-tip-item .tip-content strong{color:#e2e8f0}
body.dark-mode .tts-hero-text p,body.dark-mode .tts-tip-item .tip-content span{color:#a0aec0}
body.dark-mode .tts-textarea{background:#1a2a4a;border-color:#2a3a5a;color:#cbd5e0}
body.dark-mode .voice-option{background:#1a2a4a;border-color:#2a3a5a}
body.dark-mode .voice-option.active{border-color:#4a6cf7;background:#1e2a4a}
body.dark-mode .voice-option .voice-name{color:#e2e8f0}
body.dark-mode .tts-tabs{background:#1a2a4a}
body.dark-mode .tts-tab{color:#a0aec0}
body.dark-mode .tts-tab.active{background:#2a3a5a;color:#6a8cff}
body.dark-mode .img-drop-zone{background:#1a2a4a;border-color:#2a3a5a}
body.dark-mode .img-drop-zone .title{color:#e2e8f0}
body.dark-mode .img-result-item{background:#1a2a4a;border-color:#2a3a5a}
body.dark-mode .enhance-progress{background:linear-gradient(135deg,#1a2a4a,#1e2a4a);border-color:#2a3a5a}
body.dark-mode .enhance-progress-text{color:#e2e8f0}
body.dark-mode .enhance-progress-bar{background:#2a3a5a}
body.dark-mode .skeleton-item{background:#1a2a4a;border-color:#2a3a5a}
body.dark-mode .skeleton-box,body.dark-mode .skeleton-label{background:linear-gradient(90deg,#2a3a5a 25%,#3a4a6a 37%,#2a3a5a 63%);background-size:400% 100%}

@media (max-width:768px){
.tts-hero{padding:20px 18px}
.tts-hero-inner{flex-direction:column;align-items:stretch;gap:14px}
.tts-hero-left{min-width:0}
.tts-hero-icon{width:46px;height:46px;font-size:22px}
.tts-hero-text h1{font-size:17px}
.tts-hero-btn{width:100%;justify-content:center}
.tts-tab{font-size:13px;padding:10px 12px}
.tts-card{padding:16px 14px}
.tts-voices{grid-template-columns:repeat(3,1fr);gap:8px}
.btn-generate{width:100%;justify-content:center;padding:13px 20px;font-size:15px}
.tts-tips{grid-template-columns:1fr}
.img-zoom-toolbar{bottom:20px;gap:4px;padding:5px}
.img-zoom-btn{width:36px;height:36px;font-size:16px}
.img-zoom-level{font-size:12px;min-width:50px}
.img-zoom-close{top:14px;right:14px;width:40px;height:40px;font-size:22px}
.img-zoom-caption{font-size:12px;padding:5px 14px;top:16px}
.img-zoom-hint{display:none}
}
@media (max-width:480px){
.tts-voices{grid-template-columns:repeat(2,1fr)}
}
@media (max-width: 768px) {
    /* 手机端：隐藏整个 navbar 行 */
    .header-banner .dh-navbar {
        display: none !important;
    }
    /* 让 .header-banner 不再留底部空白 */
    .header-banner {
        padding-bottom: 0 !important;
    }
}