:root {
  --accent: #a2ceff;
  --good: #4CAF50;
}

/* ============ 说明区块 ============ */
.note-block {
    margin-top: 32px;
    border-radius: var(--radius-md);
    background: rgba(255,255,255,0.3);
    border: 1.5px solid rgba(255,255,255,0.25);
    padding: 18px 24px;
}

.note-block p {
    margin: 0;
    font-size: 15px;
    line-height: 1.75;
    color: var(--text-secondary);
}

.note-block p + p { margin-top: 6px; }

.note-block code {
    padding: 1px 6px;
    border-radius: 6px;
    background: rgba(0,0,0,0.06);
    font-size: 13px;
    font-family: "Cascadia Code", "Consolas", monospace;
}

/* 页面副标题（tool-title 已在 core.css 中定义） */
.tool-subtitle {
    text-align: center;
    margin: 12px 0 0;
    font-size: 16px;
    color: var(--text-secondary);
}

/* ============ 上传区 ============ */
.upload-section {
    margin-top: 32px;
}

.upload-box {
    border: 2px dashed rgba(255,255,255,0.5);
    border-radius: 40px;
    padding: 40px;
    text-align: center;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: transform var(--time-normal) ease, background-color var(--time-normal) ease, border-color var(--time-normal) ease;
    box-shadow: var(--shadow-inset);
    position: relative;
}

.upload-box:hover {
    transform: scale(1.01);
    background-color: rgba(0, 0, 0, 0.03);
}

.upload-box.dragover {
    border-color: var(--accent);
    background-color: rgba(162, 206, 255, 0.2);
    transform: scale(1.01);
}

.upload-box.success {
    border-color: var(--good);
    background-color: rgba(76, 175, 80, 0.15);
}

.upload-box.success p { color: var(--good); font-weight: 600; }
.upload-box.success h3 { color: var(--good); }
.upload-box input[type="file"] { display: none; }
.upload-box h3 { font-size: 22px; }
.upload-box p { font-size: 16px; }

/* ============ 预览区 ============ */
.preview-section {
    margin-top: 20px;
    background: rgba(255,255,255,0.4);
    border-radius: 40px;
    padding: 20px;
    text-align: center;
    min-height: 200px;
    position: relative;
    border: 2px solid rgba(255,255,255,0.25);
    box-shadow: var(--shadow-inset);
}

/* 全屏遮罩 */
.fullscreen-overlay {
    position: fixed; inset: 0;
    z-index: 899;
    background: rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity var(--time-normal) ease;
}
.fullscreen-overlay.visible { opacity: 1; }

/* 全屏态：scale 弹出 + 毛玻璃，避免 layout 属性过渡造成卡顿 */
.preview-section.expanded {
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%) scale(1);
    z-index: 900;
    margin: 0;
    width: calc(100vw - 100px);
    height: calc(100vh - 100px);
    border-radius: 50px;
    background: rgba(255,255,255,0.4); /* 背景遮罩已保证可读性，这里尽量透以凸显毛玻璃 */
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    overflow-y: auto;
    overflow-x: hidden;
    box-shadow: 0 30px 80px rgba(0,0,0,0.3);
    animation: fsExpand 0.4s cubic-bezier(0.3, 0.7, 0.1, 1);
}
@keyframes fsExpand {
    from { opacity: 0; transform: translate(-50%, -50%) scale(0.92); }
    to   { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}

/* 全屏滚动条样式（不破坏圆角） */
.preview-section.expanded::-webkit-scrollbar { width: 8px; }
.preview-section.expanded::-webkit-scrollbar-track {
    background: transparent; margin: 50px 0;
}
.preview-section.expanded::-webkit-scrollbar-thumb {
    background: rgba(0,0,0,0.18); border-radius: 4px;
}
.preview-section.expanded::-webkit-scrollbar-thumb:hover {
    background: rgba(0,0,0,0.3);
}

/* 全屏关闭按钮（固定在视口右上角，玻璃材质与展开面板对齐） */
.fullscreen-close {
    display: none;
    position: fixed;
    top: 24px; right: 24px;
    z-index: 901;
    width: 44px; height: 44px;
    border-radius: 50%;
    border: var(--border-glass);
    background: var(--bg-button);
    backdrop-filter: saturate(150%) blur(10px);
    -webkit-backdrop-filter: saturate(150%) blur(10px);
    box-shadow: var(--shadow-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
    padding: 0;
    align-items: center;
    justify-content: center;
    transition: transform var(--time-fast) ease, background-color var(--time-fast) ease, color var(--time-fast) ease, border-color var(--time-fast) ease, box-shadow var(--time-fast) ease;
}

.preview-section.expanded .fullscreen-close {
    display: flex;
}

.fullscreen-close:hover {
    background: rgba(255, 80, 80, 0.15);
    color: #c62828;
    border-color: rgba(255, 80, 80, 0.4);
    box-shadow: var(--shadow-md);
    transform: scale(1.1);
}

/* 小尺寸按钮：按压反馈更强（见 AGENTS.md） */
.fullscreen-close:active {
    transform: scale(0.88);
    box-shadow: var(--shadow-inset);
}

.preview-section.expanded .preview-grid {
    max-height: none;
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    max-height: 600px;
    overflow-y: auto;
    padding: 10px;
}

.preview-item {
    background: rgba(255,255,255,0.6);
    border-radius: 30px;
    padding: 15px;
    border: 2px solid rgba(255,255,255,0.25);
    box-shadow: var(--shadow-sm);
}

.preview-name-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
}

.preview-name-input {
    flex: 1;
    padding: 6px 12px;
    border-radius: 12px;
    border: 1.5px solid rgba(0,0,0,0.08);
    background: rgba(255,255,255,0.5);
    font-size: 15px;
    font-family: inherit;
    color: #333;
    outline: none;
    box-sizing: border-box;
    transition: border-color var(--time-fast) ease;
    min-width: 0;
}

.preview-name-input:focus {
    border-color: rgba(162, 206, 255, 0.6);
    background: rgba(255,255,255,0.7);
}

.preview-name-input::placeholder { color: #aaa; }

.preview-item .remove-btn {
    flex-shrink: 0;
    width: 28px; height: 28px;
    border-radius: 50%;
    background: rgba(0,0,0,0.06);
    color: #999;
    border: 1.5px solid rgba(0,0,0,0.08);
    cursor: pointer;
    font-size: 14px;
    line-height: 28px;
    text-align: center;
    transition: transform var(--time-fast) ease, background-color var(--time-fast) ease, color var(--time-fast) ease, border-color var(--time-fast) ease;
    padding: 0;
}

.preview-item .remove-btn:hover {
    background: rgba(255, 80, 80, 0.85);
    color: white;
    border-color: rgba(255, 80, 80, 0.6);
    transform: scale(1.1);
}

/* 重置文件名按钮 */
.preview-item .reset-name-btn {
    flex-shrink: 0;
    width: 28px; height: 28px;
    border-radius: 50%;
    background: rgba(0,0,0,0.06);
    color: #999;
    border: 1.5px solid rgba(0,0,0,0.08);
    cursor: pointer;
    font-size: 15px;
    line-height: 28px;
    text-align: center;
    transition: transform var(--time-fast) ease, background-color var(--time-fast) ease, color var(--time-fast) ease, border-color var(--time-fast) ease;
    padding: 0;
}

.preview-item .reset-name-btn:hover {
    background: rgba(162, 206, 255, 0.3);
    color: #0c3588;
    border-color: rgba(162, 206, 255, 0.5);
    transform: scale(1.1);
}

/* 图片信息行 */
.preview-info {
    font-size: 13px;
    color: #999;
    margin-bottom: 8px;
}

/* HDR 徽标：提示该图为 HDR/广色域，已转 SDR */
.preview-hdr-badge {
    display: inline-block;
    margin-left: 6px;
    padding: 1px 7px;
    border-radius: 999px;
    background: linear-gradient(135deg, #ffb347, #ff7e5f);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    vertical-align: middle;
    box-shadow: 0 1px 4px rgba(255, 126, 95, 0.45);
    cursor: help;
}

/* EXIF 折叠面板 */
.exif-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    margin-bottom: 8px;
    border-radius: 12px;
    background: rgba(162, 206, 255, 0.1);
    cursor: pointer;
    user-select: none;
    font-size: 13px;
    color: #0c3588;
    transition: background var(--time-fast) ease;
}

.exif-toggle:hover { background: rgba(162, 206, 255, 0.2); }
.exif-toggle-arrow { transition: transform var(--time-normal) ease; }
.exif-toggle.open .exif-toggle-arrow { transform: rotate(90deg); }

.exif-panel {
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    transition: grid-template-rows 0.4s cubic-bezier(0.32, 0.72, 0, 1), opacity 0.3s ease;
    font-size: 13px;
}

.exif-panel > * {
    overflow: hidden;
    padding: 4px 0 12px;
}

.exif-panel.open {
    grid-template-rows: 1fr;
    opacity: 1;
}

.exif-loading, .exif-empty {
    color: #999;
    padding: 8px 12px;
    text-align: center;
}

.exif-summary {
    color: #555;
    margin: 8px 0 10px;
    padding: 8px 12px;
    background: rgba(255,255,255,0.4);
    border-radius: 10px;
    word-break: break-all;
    font-size: 13px;
}

.exif-keep-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.exif-keep-label { color: #666; white-space: nowrap; font-size: 13px; }
.exif-seg { flex: 1; }

.exif-fields {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 4px;
}

.exif-field {
    display: flex;
    flex-direction: column;
    gap: 3px;
}

.exif-field label {
    font-size: 12px;
    color: #888;
}

.exif-field-input {
    padding: 5px 8px;
    border: 1.5px solid rgba(0,0,0,0.1);
    border-radius: 8px;
    font-size: 13px;
    background: rgba(255,255,255,0.6);
    color: #333;
    transition: border-color var(--time-fast) ease;
}

.exif-field-input:focus {
    outline: none;
    border-color: rgba(162, 206, 255, 0.6);
}

.exif-readonly .exif-field-val {
    padding: 5px 8px;
    color: #666;
}

.preview-item .remove-btn:active { transform: scale(0.85); }

.preview-item canvas {
    max-width: 100%;
    border-radius: 20px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    cursor: pointer;
    display: block;
    margin: 0 auto;
}

/* 体积统计 */
.size-stats {
    display: flex; align-items: center; justify-content: center;
    gap: 6px; flex-wrap: wrap; margin-top: 10px;
    font-size: 15px; color: #555;
}

.size-stats .size-original { color: #999; text-decoration: line-through; }
.size-stats .size-arrow { color: #aaa; }
.size-stats .size-compressed { color: #333; font-weight: 600; }

.size-stats .size-saving {
    margin-left: 4px; padding: 2px 10px;
    border-radius: 9999px;
    background: rgba(76, 175, 80, 0.18);
    color: #2e7d32; font-weight: 600; font-size: 14px;
}

.size-stats .size-saving.bad {
    background: rgba(255, 152, 0, 0.18);
    color: #b26500;
}

.preview-item .download-btn {
    margin-top: 8px; padding: 8px 20px;
    border-radius: 9999px;
    background: var(--accent); color: white;
    border: none; cursor: pointer;
    font-size: 15px;
    box-shadow: var(--shadow-sm);
    transition: transform var(--time-fast) ease, background-color var(--time-fast) ease, box-shadow var(--time-fast) ease;
}

.preview-item .download-btn:hover { transform: scale(1.05); box-shadow: var(--shadow-md); }
.preview-item .download-btn:active { transform: scale(0.85); }

/* 总览统计条 */
.summary-bar {
    display: flex; align-items: center; justify-content: space-between;
    gap: 20px; flex-wrap: wrap;
    margin-top: 16px; padding: 12px 16px 12px 24px;
    border-radius: 9999px;
    background: rgba(255,255,255,0.5);
    border: 2px solid rgba(255,255,255,0.3);
    box-shadow: var(--shadow-sm);
    font-size: 15px; color: #555;
}

.summary-items {
    display: flex; align-items: center;
    gap: 30px; flex-wrap: wrap;
    justify-content: center;
    margin-right: auto;
}

.summary-actions {
    display: flex; align-items: center;
    gap: 8px; flex-shrink: 0;
}

.pill-mini {
    min-width: auto !important;
    margin: 0 !important;
    padding: 10px 20px !important;
    font-size: 15px !important;
}

.pill-icon {
    width: 44px !important;
    height: 44px !important;
    padding: 0 !important;
    font-size: 22px !important;
    line-height: 44px !important;
    text-align: center !important;
    border-radius: 50% !important;
}

.summary-item { display: flex; align-items: center; gap: 8px; }
.summary-label { color: #888; }
.summary-bar b { color: #333; font-size: 16px; }
.summary-saving b { color: #2e7d32; }
.summary-item.summary-increase b { color: #c62828; }

/* EXIF 横条禁用态 */
.exif-bar.disabled { opacity: 0.45; }
.exif-bar.disabled .exif-hint::after {
    content: '（当前无 JPEG 图片）';
    color: #999;
}

/* ============ 可折叠区块 ============ */
.section-block {
    margin-top: 32px;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 32px;
    border-radius: 30px;
    background: rgba(255,255,255,0.5);
    border: 2px solid rgba(255,255,255,0.25);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    user-select: none;
    transition: background-color var(--time-fast) ease;
}

.section-header:hover {
    background: rgba(255,255,255,0.65);
}

.section-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-arrow {
    font-size: 14px;
    color: var(--text-secondary);
    transition: transform 0.5s cubic-bezier(0.32, 0.72, 0, 1);
    display: inline-block;
}

.section-block.collapsed .section-arrow {
    transform: rotate(-90deg);
}

.section-title {
    font-size: 20px;
    font-weight: 700;
    color: #333;
}

/* 水印持久区 */
.section-persistent {
    margin-top: 20px;
}

/* 可折叠内容区：grid 0fr/1fr 纯 CSS 高度过渡 */
.section-body {
    display: grid;
    grid-template-rows: 1fr;
    margin-top: 20px;
    opacity: 1;
    padding: 4px;
    transition: grid-template-rows 0.5s cubic-bezier(0.32, 0.72, 0, 1),
                margin-top 0.5s cubic-bezier(0.32, 0.72, 0, 1),
                opacity 0.35s ease;
}

.section-body > * {
    overflow: hidden;
}

.section-block.collapsed .section-body {
    grid-template-rows: 0fr;
    margin-top: 0;
    opacity: 0;
    pointer-events: none;
}

/* ============ 控制网格 ============ */
.control-grid {
    display: grid;
    gap: 20px;
    align-items: start;
    background: rgba(255,255,255,0.22);
    border: 2px solid rgba(255,255,255,0.2);
    border-radius: 40px;
    padding: 24px;
}

.control-grid-2 {
    grid-template-columns: repeat(2, 1fr);
}

.control-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

.control-span-full {
    grid-column: 1 / -1;
}

.control-span-2 {
    grid-column: span 2;
}

.control-group {
    background: rgba(255,255,255,0.55);
    padding: 22px;
    border-radius: 22px;
    border: 1.5px solid rgba(255,255,255,0.4);
    box-shadow: var(--shadow-sm);
}

.control-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;
    color: #333;
    font-size: 18px;
}

.control-group.disabled {
    opacity: 0.4;
    pointer-events: none;
}

/* 质量模式行：标签 + 自适应切换并排 */
.quality-mode-row {
    align-items: center;
    gap: 40px;
}
.quality-mode-label {
    font-weight: 600;
    font-size: 18px;
    color: #333;
    flex: 0 0 auto;
}
.quality-mode-row #qualityModeSelect {
    flex: 1;
}
.adaptive-level-seg {
    margin-top: 30px;
}

/* ============ 水印上传区 ============ */
.watermark-upload-area {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    border: 2px dashed rgba(255,255,255,0.5);
    border-radius: 30px;
    padding: 30px 32px;
    text-align: center;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    transition: transform var(--time-normal) ease, background-color var(--time-normal) ease, border-color var(--time-normal) ease;
    box-shadow: var(--shadow-inset);
}

.watermark-upload-area:hover {
    transform: scale(1.01);
    background-color: rgba(0, 0, 0, 0.03);
}

.watermark-upload-area.dragover {
    border-color: var(--accent);
    background-color: rgba(162, 206, 255, 0.2);
    transform: scale(1.01);
}

.watermark-upload-area.success {
    border-color: var(--good);
    border-style: solid;
    background-color: rgba(76, 175, 80, 0.12);
}

.watermark-upload-icon {
    font-size: 28px;
    line-height: 1;
    flex-shrink: 0;
}

.watermark-upload-icon img {
    width: 28px;
    height: 28px;
}

/* 标题行内图标 */
.title-icon {
    width: 24px;
    height: 24px;
    vertical-align: -5px;
    margin-right: 4px;
}

.watermark-upload-text {
    font-size: 16px;
    color: #333;
    font-weight: 600;
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.watermark-upload-area.success .watermark-upload-text {
    color: var(--good);
}

.remove-watermark-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(255, 80, 80, 0.15);
    color: #c62828;
    border: 1.5px solid rgba(255, 80, 80, 0.35);
    cursor: pointer;
    font-size: 14px;
    line-height: 26px;
    text-align: center;
    padding: 0;
    font-family: inherit;
    transition: transform var(--time-fast) ease, background-color var(--time-fast) ease, color var(--time-fast) ease;
}

.remove-watermark-btn:hover {
    background: rgba(255, 80, 80, 0.85);
    color: white;
    transform: scale(1.1);
}

.remove-watermark-btn:active { transform: scale(0.9); }

/* ============ 水印位置选择 ============ */
.position-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    max-width: 200px;
}

.position-cell {
    aspect-ratio: 1.4;
    border: 2px solid rgba(0,0,0,0.12);
    border-radius: 10px;
    background: rgba(255,255,255,0.5);
    cursor: pointer;
    transition: background-color var(--time-fast) ease, border-color var(--time-fast) ease, color var(--time-fast) ease, box-shadow var(--time-fast) ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: #888;
    user-select: none;
}

.position-cell:hover {
    background: rgba(162, 206, 255, 0.3);
    border-color: var(--accent);
}

.position-cell.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(162, 206, 255, 0.5);
}

/* ============ EXIF 横条 ============ */
.exif-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-top: 24px;
    padding: 16px 28px;
    border-radius: 30px;
    background: rgba(255,255,255,0.4);
    border: 2px solid rgba(255,255,255,0.25);
    box-shadow: var(--shadow-sm);
}

.exif-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.exif-label {
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.exif-hint {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============ 按钮 ============ */
.button-group {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-top: 30px;
    flex-wrap: wrap;
}

.big-button {
    padding: 15px 40px;
    border-radius: 9999px;
    font-size: 17px;
    background-color: rgba(255,255,255,0.6);
    box-shadow: var(--shadow-sm);
    transition: transform var(--time-fast) ease, background-color var(--time-fast) ease;
    text-decoration: none;
    color: black;
    cursor: pointer;
    border: none;
    font-weight: 600;
}

.big-button:hover {
    transform: scale(1.05);
    background-color: rgba(0, 0, 0, 0.05);
}

.big-button:active {
    transform: scale(0.9);
    background-color: rgba(0, 0, 0, 0.1);
}

.big-button.primary { background: var(--accent); color: white; }

.big-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

#placeholder { color: #666; margin-top: 60px; font-size: 17px; }

.rename-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 24px;
    flex-wrap: wrap;
}

.rename-label { font-size: 15px; color: #555; font-weight: 500; }

.rename-input {
    padding: 10px 20px;
    border-radius: 9999px;
    border: 1.5px solid rgba(255,255,255,0.3);
    background: rgba(255,255,255,0.4);
    font-size: 15px;
    font-family: inherit;
    outline: none;
    width: 240px;
    color: var(--text-primary);
    transition: border-color var(--time-fast) ease;
}

.rename-input:focus { border-color: rgba(162, 206, 255, 0.6); }
.rename-input::placeholder { color: #999; }

/* ============ 预览弹窗 ============ */
.preview-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0.35s ease;
}

.preview-overlay.active { opacity: 1; visibility: visible; }

.preview-overlay-content {
    max-width: 90vw;
    max-height: 85vh;
    overflow: auto;
    padding: 25px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 40px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    transform: scale(0.9) translateY(20px);
    transition: transform 0.35s ease;
    text-align: center;
}

.preview-overlay.active .preview-overlay-content {
    transform: scale(1) translateY(0);
}

.preview-overlay-content img {
    max-width: 100%;
    max-height: 70vh;
    border-radius: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.preview-overlay-title {
    margin: 0 0 15px;
    font-size: 16px;
    color: #333;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.preview-overlay-close {
    display: inline-block;
    margin-top: 15px;
    padding: 8px 24px;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.4);
    border: 1.5px solid rgba(255, 255, 255, 0.3);
    cursor: pointer;
    font-size: 15px;
    font-family: inherit;
    color: #333;
    transition: transform var(--time-fast) ease, background-color var(--time-fast) ease;
}

.preview-overlay-close:hover {
    background: rgba(0, 0, 0, 0.06);
    transform: scale(1.05);
}

.preview-overlay-close:active { transform: scale(0.88); }

/* ============ 响应式 ============ */
@media (max-width: 900px) {
    .control-grid-3 { grid-template-columns: repeat(2, 1fr); }
    .control-span-2 { grid-column: span 2; }
}

@media (max-width: 768px) {
    .tool-container { padding: 30px 20px; margin: 20px auto; }
    .upload-box { min-height: 150px; padding: 30px 20px; }
    .preview-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 15px; }
    .control-grid { padding: 18px; gap: 16px; border-radius: 26px; }
    .control-group { padding: 16px; border-radius: 20px; }
    .button-group { flex-wrap: wrap; gap: 12px; }
    .big-button { padding: 12px 30px; font-size: 16px; }
    .summary-bar { gap: 18px; }
    .section-title { font-size: 18px; }
    .exif-bar { flex-direction: column; text-align: center; }
}

@media (max-width: 540px) {
    .tool-container { padding: 24px 16px; margin: 15px auto; }
    .control-grid-2, .control-grid-3 { grid-template-columns: 1fr; }
    .control-span-full, .control-span-2 { grid-column: span 1; }
    .upload-box { min-height: 120px; padding: 24px 16px; }
    .upload-box h3 { font-size: 19px; }
    .upload-box p { font-size: 14px; }
    .preview-grid { grid-template-columns: repeat(auto-fill, minmax(120px, 1fr)); gap: 10px; }
    .preview-item canvas { border-radius: 12px; }
    .control-grid { padding: 14px; gap: 12px; border-radius: 22px; }
    .control-group { padding: 14px; border-radius: 16px; }
    .control-group label { font-size: 16px; }
    .button-group { flex-direction: column; gap: 10px; }
    .big-button { width: 100%; padding: 14px; font-size: 16px; }
    .summary-bar { gap: 14px; padding: 12px 16px; }
    .section-header { padding: 14px 20px; }
}