/* =============================================
   影子字幕拼图 - Cinema Noir Puzzle Aesthetic
   电影胶片 × 拼图碎片 × 霓虹渐变
   ============================================= */

:root {
    /* 胶片黑色系 */
    --film-black: #08090c;
    --film-dark: #0f1115;
    --film-surface: #16181d;
    --film-elevated: #1e2128;

    /* 霓虹渐变色（呼应LOGO） */
    --neon-cyan: #22d3ee;
    --neon-violet: #818cf8;
    --neon-magenta: #a855f7;
    --neon-gold: #fbbf24;

    /* 文字色彩 */
    --text-bright: #f8fafc;
    --text-dim: #94a3b8;
    --text-muted: #64748b;

    /* 拼图分割线 */
    --puzzle-line: linear-gradient(90deg, transparent 0%, var(--neon-cyan) 20%, var(--neon-violet) 50%, var(--neon-magenta) 80%, transparent 100%);

    /* 玻璃效果 */
    --glass-bg: rgba(22, 24, 29, 0.85);
    --glass-border: rgba(255, 255, 255, 0.06);
    --glass-blur: blur(24px);

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;

    /* 动画曲线 */
    --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* 胶片颗粒纹理 */
@keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-2%, -2%); }
    20% { transform: translate(2%, 2%); }
    30% { transform: translate(-1%, 1%); }
    40% { transform: translate(1%, -1%); }
    50% { transform: translate(-2%, 2%); }
    60% { transform: translate(2%, -2%); }
    70% { transform: translate(-1%, -1%); }
    80% { transform: translate(1%, 1%); }
    90% { transform: translate(-2%, -2%); }
}

/* 拼图分割线闪烁 */
@keyframes puzzleGlow {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* 页面加载动画 */
@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.92);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 基础重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'IBM Plex Mono', 'Noto Sans SC', monospace;
    background: var(--film-black);
    color: var(--text-bright);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* 胶片颗粒叠加层 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.035;
    pointer-events: none;
    z-index: 9999;
    animation: grain 0.5s steps(10) infinite;
}

/* 背景渐变光晕 */
body::after {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(34, 211, 238, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(168, 85, 247, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 50%, rgba(129, 140, 248, 0.04) 0%, transparent 60%);
    pointer-events: none;
    z-index: -1;
}

/* 主容器 */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 2.5rem;
    max-width: 1920px;
    margin: 0 auto;
    position: relative;
}

/* ===== 头部区域 ===== */
header {
    text-align: center;
    margin-bottom: 1.5rem;
    position: relative;
    animation: fadeSlideUp 0.8s var(--ease-out-expo) both;
}

header h1 {
    font-family: 'Archivo Black', 'Noto Sans SC', sans-serif;
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    font-weight: 900;
    letter-spacing: -0.02em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    position: relative;
    padding-bottom: 0.8rem;
    /* 霓虹文字效果 */
    background: linear-gradient(135deg, var(--text-bright) 0%, var(--neon-cyan) 50%, var(--neon-violet) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 60px rgba(34, 211, 238, 0.3);
}

/* 标题下方拼图分割线 */
header h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 180px;
    height: 2px;
    background: var(--puzzle-line);
    border-radius: 2px;
    animation: puzzleGlow 3s ease-in-out infinite;
}

.header-logo {
    width: 2.4rem;
    height: 2.4rem;
    filter: drop-shadow(0 0 20px rgba(34, 211, 238, 0.5));
    transition: transform 0.4s var(--ease-spring);
}

.header-logo:hover {
    transform: rotate(-10deg) scale(1.1);
}

header p {
    font-family: 'IBM Plex Mono', monospace;
    color: var(--text-dim);
    font-size: 0.85rem;
    margin-top: 0.6rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* 语言切换器 */
.lang-switch {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    z-index: 100;
}

.lang-icon {
    font-size: 1rem;
    opacity: 0.7;
}

.lang-select {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-bright);
    padding: 0.5rem 2rem 0.5rem 0.8rem;
    border-radius: var(--radius-sm);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%2394a3b8' d='M1 3l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.6rem center;
}

.lang-select:hover,
.lang-select:focus {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 20px rgba(34, 211, 238, 0.15);
    outline: none;
}

.lang-select option {
    background: var(--film-dark);
    color: var(--text-bright);
}

/* ===== 主内容区 ===== */
main {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    min-height: 0;
    animation: scaleIn 0.9s var(--ease-out-expo) 0.1s both;
}

/* ===== 预览区域 - 电影银幕效果 ===== */
.preview-section {
    background: var(--film-surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    /* 电影银幕阴影 */
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.03) inset,
        0 40px 100px -20px rgba(0, 0, 0, 0.8),
        0 0 80px rgba(34, 211, 238, 0.05);
}

/* 银幕边框装饰 - 胶片孔 */
.preview-section::before {
    content: '';
    position: absolute;
    left: 0;
    top: 1.5rem;
    bottom: 1.5rem;
    width: 6px;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 8px,
        rgba(255, 255, 255, 0.08) 8px,
        rgba(255, 255, 255, 0.08) 16px
    );
    border-radius: 0 3px 3px 0;
}

.preview-section::after {
    content: '';
    position: absolute;
    right: 0;
    top: 1.5rem;
    bottom: 1.5rem;
    width: 6px;
    background: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 8px,
        rgba(255, 255, 255, 0.08) 8px,
        rgba(255, 255, 255, 0.08) 16px
    );
    border-radius: 3px 0 0 3px;
}

.canvas-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.9),
        0 0 1px rgba(255, 255, 255, 0.1);
}

/* 拖拽上传区域 */
.drop-zone {
    position: absolute;
    inset: 0;
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    transition: all 0.4s var(--ease-out-expo);
    z-index: 10;
    background:
        radial-gradient(circle at center, rgba(34, 211, 238, 0.03) 0%, transparent 70%);
}

.drop-zone span {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 1rem;
    color: var(--text-dim);
    padding: 0 2rem;
    text-align: center;
    letter-spacing: 0.02em;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--neon-cyan);
    background:
        radial-gradient(circle at center, rgba(34, 211, 238, 0.08) 0%, transparent 70%);
    box-shadow: 0 0 40px rgba(34, 211, 238, 0.1) inset;
}

.drop-zone:hover span,
.drop-zone.drag-over span {
    color: var(--neon-cyan);
}

.drop-zone.hidden {
    display: none;
}

/* ===== 控制面板 - 拼图板块 ===== */
.control-panel {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow: hidden;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.02) inset,
        0 40px 100px -20px rgba(0, 0, 0, 0.6);
}

/* 控制组 - 拼图块效果 */
.control-group {
    padding: 1rem;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.04);
    position: relative;
    transition: all 0.3s ease;
}

.control-group:hover {
    border-color: rgba(255, 255, 255, 0.08);
    background: rgba(0, 0, 0, 0.35);
}

/* 拼图块顶部装饰线 */
.control-group::before {
    content: '';
    position: absolute;
    top: 0;
    left: 1rem;
    right: 1rem;
    height: 1px;
    background: var(--puzzle-line);
    opacity: 0.3;
    transition: opacity 0.3s ease;
}

.control-group:hover::before {
    opacity: 0.6;
}

.control-group h3 {
    font-family: 'Archivo Black', 'Noto Sans SC', sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 0.8rem;
    color: var(--text-bright);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: 0.02em;
}

.hint {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.6rem;
    font-style: italic;
}

/* 按钮行布局 */
.button-row {
    display: flex;
    gap: 0.8rem;
}

.button-row > * {
    flex: 1;
}

/* 两列设置网格 */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

.settings-grid > div {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* ===== 输入控件样式 ===== */

/* 文本输入框 */
textarea {
    width: 100%;
    height: 100px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    color: var(--text-bright);
    padding: 0.8rem;
    resize: none;
    font-family: 'IBM Plex Mono', 'Noto Sans SC', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: 0.8rem;
    transition: all 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: var(--neon-cyan);
    box-shadow:
        0 0 0 3px rgba(34, 211, 238, 0.1),
        0 0 30px rgba(34, 211, 238, 0.1) inset;
}

textarea::placeholder {
    color: var(--text-muted);
}

/* 样式子面板 */
.style-sub-panel {
    background: rgba(0, 0, 0, 0.25);
    padding: 0.8rem;
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    flex: 1;
    min-height: 0;
}

/* 字段 */
.field {
    margin-bottom: 0;
}

.field label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-dim);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* 下拉框和文本输入 */
select,
input[type="text"] {
    width: 100%;
    height: 38px;
    background: rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-sm);
    color: var(--text-bright);
    padding: 0 0.8rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

select:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--neon-violet);
    box-shadow: 0 0 0 3px rgba(129, 140, 248, 0.1);
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 10 10'%3E%3Cpath fill='%2394a3b8' d='M1 3l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.8rem center;
    padding-right: 2rem;
    cursor: pointer;
}

select option {
    background: var(--film-dark);
    color: var(--text-bright);
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
}

/* 颜色选择器 */
.color-pickers {
    display: flex;
    gap: 0.5rem;
}

input[type="color"] {
    flex: 1;
    height: 38px;
    border: none;
    border-radius: var(--radius-sm);
    background: none;
    cursor: pointer;
    padding: 2px;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
}

/* 滑块 */
input[type="range"] {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    cursor: pointer;
    appearance: none;
    margin-top: 0.3rem;
}

input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 14px;
    height: 14px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-violet));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
    transition: transform 0.2s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: linear-gradient(135deg, var(--neon-cyan), var(--neon-violet));
    border-radius: 50%;
    cursor: pointer;
    border: none;
    box-shadow: 0 0 10px rgba(34, 211, 238, 0.5);
}

/* 复选框 */
input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--neon-cyan);
    cursor: pointer;
}

/* ===== 按钮样式 ===== */

/* 文件选择按钮 */
.file-label {
    background: linear-gradient(135deg, var(--neon-cyan) 0%, var(--neon-violet) 100%);
    color: var(--film-black);
    height: 42px;
    text-align: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 600;
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s var(--ease-spring);
    position: relative;
    overflow: hidden;
}

.file-label::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.file-label:hover {
    transform: translateY(-2px);
    box-shadow:
        0 10px 30px rgba(34, 211, 238, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

.file-label:hover::before {
    opacity: 1;
}

.file-label input {
    display: none;
}

/* 次要按钮（删除） */
.secondary-btn {
    height: 42px;
    background: rgba(239, 68, 68, 0.1);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all 0.3s ease;
}

.secondary-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: rgba(239, 68, 68, 0.4);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(239, 68, 68, 0.2);
}

/* 主要按钮（保存） */
.primary-btn {
    height: 42px;
    background: linear-gradient(135deg, var(--neon-gold) 0%, #f59e0b 100%);
    color: var(--film-black);
    border: none;
    border-radius: var(--radius-md);
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 600;
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.3s var(--ease-spring);
    position: relative;
    overflow: hidden;
}

.primary-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.3) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow:
        0 10px 30px rgba(251, 191, 36, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.2) inset;
}

.primary-btn:hover::before {
    opacity: 1;
}

/* 水印控制面板 */
.field.inline {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.8rem;
}

.field.inline label {
    margin-bottom: 0;
    font-size: 0.8rem;
    text-transform: none;
}

.disabled-group {
    opacity: 0.25;
    pointer-events: none;
    filter: grayscale(1);
    transition: all 0.4s ease;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.disabled-group.active {
    opacity: 1;
    pointer-events: auto;
    filter: none;
}

/* ===== Toast 提示 ===== */
#toast-container {
    position: fixed;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10000;
}

.toast {
    background: linear-gradient(135deg, var(--neon-magenta), var(--neon-violet));
    color: white;
    padding: 1rem 2rem;
    border-radius: var(--radius-md);
    box-shadow:
        0 20px 50px rgba(168, 85, 247, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    margin-bottom: 0.8rem;
    animation: toastIn 0.5s var(--ease-spring), toastOut 0.4s ease-in 2.6s forwards;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 600;
    font-size: 0.9rem;
    letter-spacing: 0.02em;
}

@keyframes toastIn {
    from {
        transform: scale(0.8) translateY(-30px);
        opacity: 0;
    }
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

@keyframes toastOut {
    to {
        opacity: 0;
        transform: translateY(-20px);
    }
}

/* ===== 页脚 ===== */
.app-footer {
    margin-top: auto;
    padding-top: 1rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding-bottom: 0.8rem;
    animation: fadeSlideUp 0.8s var(--ease-out-expo) 0.3s both;
}

.app-footer a,
.app-footer span {
    color: var(--text-muted);
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    white-space: nowrap;
}

.app-footer .divider {
    color: var(--text-muted);
    opacity: 0.4;
    cursor: default;
}

.app-footer .footer-link-with-logo {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.app-footer .footer-logo {
    width: 16px;
    height: 16px;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.app-footer a:hover .footer-logo {
    opacity: 1;
    filter: drop-shadow(0 0 8px rgba(34, 211, 238, 0.4));
}

/* 微信公众号二维码悬浮效果 */
.wechat-qr-trigger {
    position: relative;
    cursor: pointer;
}

.wechat-qr-popup {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    margin-bottom: 10px;
    background: var(--film-surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.05) inset,
        0 20px 50px rgba(0, 0, 0, 0.8),
        0 0 60px rgba(34, 211, 238, 0.1);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s var(--ease-spring);
    z-index: 1000;
    pointer-events: none;
}

.wechat-qr-trigger:hover .wechat-qr-popup {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.wechat-qr-popup img {
    display: block;
    width: 160px;
    height: 160px;
    border-radius: var(--radius-sm);
    margin-bottom: 0.5rem;
}

.wechat-qr-popup p {
    font-family: 'IBM Plex Mono', 'Noto Sans SC', monospace;
    font-size: 0.75rem;
    color: var(--text-dim);
    text-align: center;
    margin: 0;
}

/* 小三角箭头 */
.wechat-qr-popup::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--film-surface);
}

.app-footer a:hover,
.app-footer span:hover {
    color: var(--neon-cyan);
    text-shadow: 0 0 20px rgba(34, 211, 238, 0.5);
}

/* ===== 打赏模态框 ===== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(8, 9, 12, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

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

.modal-content {
    background: var(--film-surface);
    border: 1px solid var(--glass-border);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 480px;
    text-align: center;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: transform 0.5s var(--ease-spring);
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.03) inset,
        0 30px 80px -10px rgba(0, 0, 0, 0.8),
        0 0 100px rgba(168, 85, 247, 0.1);
}

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

.modal-content h3 {
    font-family: 'Archivo Black', 'Noto Sans SC', sans-serif;
    font-size: 1.3rem;
    background: linear-gradient(135deg, var(--neon-gold), #f59e0b);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.8rem;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-bright);
    transform: rotate(90deg);
}

.qr-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 1.5rem;
}

.qr-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem;
}

.qr-item span {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.8rem;
    color: var(--text-dim);
}

.qr-placeholder {
    width: 140px;
    height: 140px;
    background: #fff;
    border-radius: var(--radius-md);
    padding: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.qr-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

/* ===== 响应式设计 ===== */
@media (max-width: 1200px) {
    .app-container {
        padding: 1rem;
        min-height: 100vh;
        height: auto;
    }

    main {
        grid-template-columns: 1fr;
        overflow-y: auto;
    }

    body {
        overflow-y: auto;
        height: auto;
    }

    .preview-section {
        aspect-ratio: 16/9;
        min-height: 320px;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .app-container {
        padding: 0.8rem;
    }

    header h1 {
        font-size: 1.4rem;
    }

    .lang-switch {
        position: static;
        justify-content: center;
        margin-bottom: 0.8rem;
    }

    .button-row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .app-footer {
        flex-wrap: wrap;
        gap: 0.8rem;
        font-size: 0.7rem;
    }

    .app-footer .divider {
        display: none;
    }
}