/**
 * Video to MP3 Page Styles
 * 视频转 MP3 页面样式 - 页面级命名空间 + 局部 BEM 命名规范
 *
 * @author AirMore Team
 * @version 1.1
 */

/* ==========================================================================
   CSS Reset & Override
   重置与覆盖样式
   ========================================================================== */

#video-to-mp3-page,
#video-to-mp3-page * {
    box-sizing: border-box;
}

#video-to-mp3-page svg {
    display: block;
}

/* ==========================================================================
   Base Styles
   基础样式
   ========================================================================== */

#video-to-mp3-page {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #000000;
    color: #ffffff;
    min-height: 100vh;
}

#video-to-mp3-page .container {
    margin: 0 auto;
    padding: 0 1rem;
}

#video-to-mp3-page .content {
    max-width: 64rem;
    margin-left: auto;
    margin-right: auto;
}

/* ==========================================================================
   Hero Section
   首页英雄区域
   ========================================================================== */

#video-to-mp3-page .vtm-hero {
    position: relative;
    padding: 8rem 0 0.5rem;
    background: #000000;
    overflow: hidden;
}

#video-to-mp3-page .vtm-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

#video-to-mp3-page .vtm-hero .content {
    position: relative;
    z-index: 1;
    text-align: center;
}

#video-to-mp3-page .vtm-title {
    margin: 0 0 1rem;
    color: #ffffff;
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.2;
}

#video-to-mp3-page .vtm-title__highlight {
    display: block;
    font-size: 3.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, #60a5fa 0%, #a855f7 50%, #ec4899 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

#video-to-mp3-page .vtm-subtitle {
    max-width: 56rem;
    margin: 0 auto 0.5rem;
    color: #d1d5db;
    font-size: 1.25rem;
    line-height: 1.6;
}

/* ==========================================================================
   Main Function Section
   主要功能区域
   ========================================================================== */

#video-to-mp3-page .vtm-function {
    padding: 1rem 0 3rem;
    background-color: #000000;
}

/* ==========================================================================
   Upload Area
   上传区域
   ========================================================================== */

#video-to-mp3-page .vtm-upload {
    position: relative;
    cursor: pointer;
    transition: all 0.4s ease;
}

#video-to-mp3-page .vtm-upload:focus-visible {
    outline: none;
}

#video-to-mp3-page .vtm-upload:focus-visible .vtm-upload__content {
    border-color: #60a5fa;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.22), 0 12px 48px rgba(59, 130, 246, 0.2);
}

#video-to-mp3-page .vtm-upload__content {
    min-height: 22rem;
    padding: 2rem;
    border: 2px dashed #374151;
    border-radius: 1rem;
    background: linear-gradient(145deg, #111827, #1f2937);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    text-align: center;
    transition: all 0.4s ease;
}

#video-to-mp3-page .vtm-upload:hover .vtm-upload__content {
    border-color: #3b82f6;
    background: linear-gradient(145deg, #1f2937, rgba(37, 99, 235, 0.08));
    box-shadow: 0 12px 48px rgba(59, 130, 246, 0.2);
    transform: translateY(-2px);
}

#video-to-mp3-page .vtm-upload--dragover .vtm-upload__content {
    border-color: #3b82f6;
    background: linear-gradient(145deg, rgba(30, 64, 175, 0.13), rgba(59, 130, 246, 0.08));
    box-shadow: 0 16px 64px rgba(59, 130, 246, 0.3);
    transform: scale(1.02) translateY(-2px);
}

#video-to-mp3-page .vtm-upload__icon {
    margin-bottom: 1.5rem;
    /* Reserve space for icon to prevent CLS - 4rem font-size = 64px */
    min-width: 4rem;
    min-height: 4rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

#video-to-mp3-page .vtm-upload__icon i {
    display: inline-block;
    font-size: 4rem;
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: #3b82f6;
    width: 1em;
    height: 1em;
    text-align: center;
}

#video-to-mp3-page .vtm-upload__title {
    margin: 0 0 0.5rem;
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 600;
}

#video-to-mp3-page .vtm-upload__subtitle {
    max-width: 42rem;
    margin: 0 auto 1rem;
    color: #9ca3af;
    line-height: 1.6;
}

#video-to-mp3-page .vtm-upload__limits {
    max-width: 42rem;
    margin: 0 auto 1.5rem;
    color: #6b7280;
    font-size: 0.875rem;
    line-height: 1.6;
}

#video-to-mp3-page .vtm-privacy-note {
    margin: 1rem 0 0;
    color: #6b7280;
    font-size: 0.875rem;
}

#video-to-mp3-page .vtm-upload__button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #ffffff;
    border: none;
    border-radius: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 1rem 0;
}

#video-to-mp3-page .vtm-upload__button i[class*="fa"] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1em;
    height: 1em;
    flex-shrink: 0;
}

#video-to-mp3-page .vtm-upload__button:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}

/* ==========================================================================
   Buttons
   按钮
   ========================================================================== */

#video-to-mp3-page .vtm-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: 3rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.75rem;
    color: #ffffff;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

#video-to-mp3-page .vtm-button--primary {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
}

#video-to-mp3-page .vtm-button--primary:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}

#video-to-mp3-page .vtm-button--secondary {
    border: 1px solid #4b5563;
    background: #374151;
    color: #d1d5db;
}

#video-to-mp3-page .vtm-button--secondary:hover {
    background: #4b5563;
    transform: translateY(-2px);
}

#video-to-mp3-page .vtm-button:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    box-shadow: none;
    transform: none;
}

/* ==========================================================================
   Video Preview
   视频预览
   ========================================================================== */

#video-to-mp3-page .vtm-selected {
    margin-top: 1.5rem;
    border-radius: 1rem;
    padding: 0;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

#video-to-mp3-page .vtm-video-section {
    margin-bottom: 1.5rem;
}

#video-to-mp3-page .vtm-video-container {
    position: relative;
    width: 100%;
    max-height: 600px;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 0.75rem;
    background: #000000;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
}

#video-to-mp3-page .vtm-video {
    display: block;
    width: 100%;
    max-height: 600px;
    height: auto;
    background: #000000;
    object-fit: contain;
}

#video-to-mp3-page .vtm-selected__body {
    padding: 1.75rem 2rem;
    border-radius: 0.75rem;
    background: #111827;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

#video-to-mp3-page .vtm-file {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    margin: 0;
    text-align: left;
}

#video-to-mp3-page .vtm-file > div:first-child {
    min-width: 0;
}

#video-to-mp3-page .vtm-file__name {
    margin: 0 0 0.25rem;
    color: #ffffff;
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.35;
    word-break: break-word;
}

#video-to-mp3-page .vtm-file__meta {
    margin: 0;
    color: #9ca3af;
    font-size: 0.875rem;
    line-height: 1.6;
}

#video-to-mp3-page .vtm-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    flex-shrink: 0;
}

#video-to-mp3-page .vtm-oss-note {
    margin: 0.75rem 0 0;
    color: #6b7280;
    font-size: 0.82rem;
    line-height: 1.5;
    text-align: center;
}

#video-to-mp3-page .vtm-oss-note a {
    color: #93c5fd;
}

/* ==========================================================================
   Progress Overlay
   进度覆盖层
   ========================================================================== */

#video-to-mp3-page .vtm-progress-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

#video-to-mp3-page .vtm-progress-content {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    aspect-ratio: 16/9;
    padding: 2rem;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    background: linear-gradient(145deg, rgba(0, 0, 0, 0.8), rgba(20, 20, 30, 0.9));
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
}

#video-to-mp3-page .vtm-progress-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
    padding: 1.5rem;
    border-radius: 0.5rem;
    background-color: transparent;
    text-align: center;
}

#video-to-mp3-page .vtm-progress-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 1rem;
}

#video-to-mp3-page .vtm-progress-icon i {
    color: #3b82f6;
    font-size: 3rem;
}

#video-to-mp3-page .vtm-progress__title {
    margin: 0 0 1.5rem;
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 600;
}

#video-to-mp3-page .vtm-progress-bar-container {
    width: 90%;
    max-width: 420px;
    min-width: 240px;
    height: 0.75rem;
    margin-bottom: 1.5rem;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 9999px;
    background-color: rgba(255, 255, 255, 0.2);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

#video-to-mp3-page .vtm-progress-bar {
    width: 0%;
    height: 100%;
    position: relative;
    border-radius: 9999px;
    background-color: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: width 0.5s ease-out;
}

#video-to-mp3-page .vtm-progress-bar::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 9999px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.4) 50%,
        transparent 100%
    );
    animation: vtm-progress-shine 2s ease-in-out infinite;
}

@keyframes vtm-progress-shine {
    0% {
        transform: translateX(-100%);
    }

    100% {
        transform: translateX(100%);
    }
}

#video-to-mp3-page .vtm-progress-percent {
    color: #ffffff;
    font-weight: 500;
    font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;
    letter-spacing: 0.5px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

#video-to-mp3-page .vtm-progress__description {
    margin: 1rem 0 0;
    color: #9ca3af;
    font-size: 0.875rem;
    line-height: 1.6;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   Result Section
   结果区域
   ========================================================================== */

#video-to-mp3-page .vtm-result {
    margin-top: 1.5rem;
    border-radius: 1rem;
    text-align: center;
}

#video-to-mp3-page .vtm-result__header {
    text-align: center;
    margin-bottom: 1rem;
}

#video-to-mp3-page .vtm-result__title {
    margin: 0;
    color: #ffffff;
    font-size: 1.75rem;
    font-weight: 700;
}

#video-to-mp3-page .vtm-result__audio-section {
    display: flex;
    flex-direction: column;
    margin-bottom: 1.5rem;
}

#video-to-mp3-page .vtm-audio-native {
    display: none;
}

#video-to-mp3-page .vtm-audio-player {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#video-to-mp3-page .vtm-audio-player__progress-wrapper {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
}

#video-to-mp3-page .vtm-audio-player__time-display {
    min-width: 45px;
    color: #cbd5e0;
    font-size: 0.875rem;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    text-align: center;
}

#video-to-mp3-page .vtm-audio-player__progress-container {
    position: relative;
    flex: 1;
    height: 6px;
    overflow: visible;
    border-radius: 3px;
    background: rgba(75, 85, 99, 0.5);
    cursor: pointer;
}

#video-to-mp3-page .vtm-audio-player__progress-buffered {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    width: 0%;
    height: 100%;
    border-radius: 3px;
    background: rgba(107, 114, 128, 0.6);
    transition: width 0.3s ease;
}

#video-to-mp3-page .vtm-audio-player__progress-bar {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 2;
    width: 0%;
    height: 100%;
    border-radius: 3px;
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
    transition: width 0.1s linear;
    pointer-events: none;
}

#video-to-mp3-page .vtm-audio-player__progress-handle {
    position: absolute;
    top: 50%;
    right: -8px;
    width: 16px;
    height: 16px;
    border: 2px solid #3b82f6;
    border-radius: 50%;
    background: #ffffff;
    box-shadow: 0 2px 6px rgba(59, 130, 246, 0.4);
    transform: translateY(-50%);
    transition: all 0.2s ease;
}

#video-to-mp3-page .vtm-audio-player__progress-handle:hover {
    transform: translateY(-50%) scale(1.2);
    box-shadow: 0 3px 8px rgba(59, 130, 246, 0.6);
}

#video-to-mp3-page .vtm-audio-player__controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

#video-to-mp3-page .vtm-audio-player__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background: rgba(203, 213, 224, 0.1);
    color: #cbd5e0;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
}

#video-to-mp3-page .vtm-audio-player__btn i {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 1rem;
    height: 1rem;
}

#video-to-mp3-page .vtm-audio-player__btn:hover {
    background: rgba(203, 213, 224, 0.2);
    color: #ffffff;
}

#video-to-mp3-page .vtm-audio-player__btn:active {
    transform: scale(0.95);
}

#video-to-mp3-page .vtm-audio-player__btn--play {
    width: 64px;
    height: 64px;
    margin: 0 0.5rem;
    background: rgba(203, 213, 224, 0.9);
    color: #2d3748;
    font-size: 1.5rem;
}

#video-to-mp3-page .vtm-audio-player__btn--play i {
    width: 1.5rem;
    height: 1.5rem;
}

#video-to-mp3-page .vtm-audio-player__btn--play:hover {
    background: #ffffff;
    color: #2d3748;
}

#video-to-mp3-page .vtm-result__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

#video-to-mp3-page .vtm-result__button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.75rem;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
}

#video-to-mp3-page .vtm-result__button i {
    width: 1rem;
    height: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

#video-to-mp3-page .vtm-result__button--primary {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #ffffff;
}

#video-to-mp3-page .vtm-result__button--primary:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    box-shadow: 0 8px 32px rgba(59, 130, 246, 0.4);
    transform: translateY(-2px);
}

#video-to-mp3-page .vtm-result__button--secondary {
    background: #374151;
    color: #d1d5db;
}

#video-to-mp3-page .vtm-result__button--secondary:hover {
    background: #4b5563;
    transform: translateY(-2px);
}

/* ==========================================================================
   How to Use Section
   使用步骤区域
   ========================================================================== */

#video-to-mp3-page .vtm-how-to-use {
    padding-top: 5rem;
    padding-bottom: 5rem;
    background-color: #000000;
}

#video-to-mp3-page .vtm-how-to-use .content {
    max-width: 80rem;
}

#video-to-mp3-page .vtm-how-to-use__header {
    text-align: center;
    margin-bottom: 5rem;
}

#video-to-mp3-page .vtm-how-to-use__title {
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 1.5rem;
    line-height: 1.1;
}

#video-to-mp3-page .vtm-how-to-use__subtitle {
    font-size: 1.25rem;
    color: #9ca3af;
    line-height: 1.5;
    margin: 0;
}

#video-to-mp3-page .vtm-steps-wrapper {
    position: relative;
}

#video-to-mp3-page .vtm-steps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    list-style: none;
    padding: 0;
    margin: 0;
}

#video-to-mp3-page .vtm-step {
    position: relative;
}

#video-to-mp3-page .vtm-step__card {
    background: #000000;
    border: 1px solid #374151;
    border-radius: 1.5rem;
    padding: 2rem;
    text-align: center;
    transition: all 0.5s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
}

#video-to-mp3-page .vtm-step:nth-child(1) .vtm-step__card:hover {
    border-color: #3b82f6;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 25px 50px rgba(59, 130, 246, 0.2);
}

#video-to-mp3-page .vtm-step:nth-child(2) .vtm-step__card:hover {
    border-color: #8b5cf6;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 25px 50px rgba(139, 92, 246, 0.2);
}

#video-to-mp3-page .vtm-step:nth-child(3) .vtm-step__card:hover {
    border-color: #ec4899;
    transform: translateY(-2px) scale(1.05);
    box-shadow: 0 25px 50px rgba(236, 72, 153, 0.2);
}

#video-to-mp3-page .vtm-step__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    z-index: 2;
}

#video-to-mp3-page .vtm-step__header {
    margin-bottom: 1rem;
}

#video-to-mp3-page .vtm-step__number {
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 auto 2rem auto;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

#video-to-mp3-page .vtm-step:nth-child(1) .vtm-step__number {
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4);
}

#video-to-mp3-page .vtm-step:nth-child(2) .vtm-step__number {
    background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    box-shadow: 0 4px 16px rgba(139, 92, 246, 0.4);
}

#video-to-mp3-page .vtm-step:nth-child(3) .vtm-step__number {
    background: linear-gradient(135deg, #ec4899 0%, #ef4444 100%);
    box-shadow: 0 4px 16px rgba(236, 72, 153, 0.4);
}

#video-to-mp3-page .vtm-step__title {
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 1rem;
    text-align: center;
    transition: color 0.3s ease;
}

#video-to-mp3-page .vtm-step:nth-child(1) .vtm-step__card:hover .vtm-step__title {
    color: #93c5fd;
}

#video-to-mp3-page .vtm-step:nth-child(2) .vtm-step__card:hover .vtm-step__title {
    color: #c4b5fd;
}

#video-to-mp3-page .vtm-step:nth-child(3) .vtm-step__card:hover .vtm-step__title {
    color: #f9a8d4;
}

#video-to-mp3-page .vtm-step__description {
    color: #9ca3af;
    line-height: 1.625;
    text-align: center;
    word-wrap: break-word;
    overflow-wrap: break-word;
    hyphens: auto;
    max-width: 100%;
    padding: 0;
    margin: 0;
}

/* ==========================================================================
   FAQ Section
   FAQ 区域
   ========================================================================== */

#video-to-mp3-page .vtm-faq-section {
    position: relative;
    padding-top: 4rem;
    padding-bottom: 4rem;
    background-color: #000000;
}

#video-to-mp3-page .vtm-faq-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(168, 85, 247, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

#video-to-mp3-page .vtm-faq-section .content {
    position: relative;
    z-index: 1;
    max-width: 76rem;
    margin: 0 auto;
    padding: 0 2rem;
}

#video-to-mp3-page .vtm-faq-section__header {
    text-align: center;
    margin-bottom: 3rem;
}

#video-to-mp3-page .vtm-faq-section__title {
    font-size: 3rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 1rem;
    line-height: 1.2;
}

#video-to-mp3-page .vtm-faq-section__subtitle {
    font-size: 1.25rem;
    color: #9ca3af;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

#video-to-mp3-page .vtm-faq-wrapper {
    max-width: 56rem;
    margin: 0 auto;
}

#video-to-mp3-page .vtm-faq-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#video-to-mp3-page .vtm-faq {
    padding: 1.5rem;
    border: 1px solid #374151;
    border-radius: 1rem;
    background: linear-gradient(145deg, #000000 60%, #111827 100%);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

#video-to-mp3-page .vtm-faq:hover {
    border-color: #4b5563;
    background: linear-gradient(145deg, #111827, #1f2937);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

#video-to-mp3-page .vtm-faq__button {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
    border: none;
    background: transparent;
    text-align: left;
    cursor: pointer;
    transition: all 0.3s ease;
    outline: none;
}

#video-to-mp3-page .vtm-faq__button:focus {
    outline: none;
}

#video-to-mp3-page .vtm-faq__button:hover .vtm-faq__question {
    color: #60a5fa;
}

#video-to-mp3-page .vtm-faq__question {
    flex: 1;
    margin: 0 1rem 0 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: #ffffff;
    text-align: left;
    transition: color 0.3s ease;
}

#video-to-mp3-page .vtm-faq__icon {
    width: 1.5rem;
    height: 1.5rem;
    flex-shrink: 0;
    color: #9ca3af;
    transition: all 0.3s ease;
}

#video-to-mp3-page .vtm-faq__button[aria-expanded="true"] .vtm-faq__icon,
#video-to-mp3-page .vtm-faq__icon--rotated {
    transform: rotate(180deg);
    color: #60a5fa;
}

#video-to-mp3-page .vtm-faq__answer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid #374151;
    transition: all 0.3s ease;
}

#video-to-mp3-page .vtm-faq__text {
    margin: 0;
    color: #d1d5db;
    font-size: 1rem;
    line-height: 1.6;
}

#video-to-mp3-page .vtm-faq:hover .vtm-faq__question {
    color: #e5e7eb;
}

/* ==========================================================================
   States
   状态
   ========================================================================== */

#video-to-mp3-page .vtm-selected[hidden],
#video-to-mp3-page .vtm-selected__body[hidden],
#video-to-mp3-page .vtm-oss-note[hidden],
#video-to-mp3-page .vtm-upload[hidden],
#video-to-mp3-page .vtm-progress-overlay[hidden],
#video-to-mp3-page .vtm-result[hidden],
#video-to-mp3-page .vtm-faq__answer[hidden] {
    display: none;
}

/* ==========================================================================
   Responsive
   响应式
   ========================================================================== */

@media (max-width: 768px) {
    #video-to-mp3-page .vtm-hero {
        padding-top: 6rem;
    }

    #video-to-mp3-page .vtm-title,
    #video-to-mp3-page .vtm-title__highlight {
        font-size: 2.5rem;
    }

    #video-to-mp3-page .vtm-subtitle {
        font-size: 1.05rem;
    }

    #video-to-mp3-page .vtm-upload__content {
        min-height: 20rem;
        padding: 1.5rem 1rem;
    }

    #video-to-mp3-page .vtm-upload__icon {
        min-width: 3rem;
        min-height: 3rem;
    }

    #video-to-mp3-page .vtm-upload__icon i {
        font-size: 3rem;
        width: 1em;
        height: 1em;
    }

    #video-to-mp3-page .vtm-selected__body,
    #video-to-mp3-page .vtm-result {
        padding: 1rem;
    }

    #video-to-mp3-page .vtm-file {
        flex-direction: column;
        align-items: stretch;
        gap: 1rem;
    }

    #video-to-mp3-page .vtm-actions {
        justify-content: flex-start;
        margin-top: 0;
    }

    #video-to-mp3-page .vtm-button,
    #video-to-mp3-page .vtm-result__button {
        width: 100%;
    }

    #video-to-mp3-page .vtm-progress-content {
        width: 90%;
        max-width: 400px;
        min-height: 250px;
        padding: 1.5rem;
    }

    #video-to-mp3-page .vtm-progress-icon {
        width: 2.5rem;
        height: 2.5rem;
        margin-bottom: 0.75rem;
    }

    #video-to-mp3-page .vtm-progress-icon i {
        font-size: 2.5rem;
    }

    #video-to-mp3-page .vtm-progress__title {
        font-size: 1.25rem;
        margin-bottom: 1.25rem;
    }

    #video-to-mp3-page .vtm-progress-bar-container {
        width: 95%;
        max-width: 320px;
        min-width: 200px;
        margin-bottom: 1.25rem;
    }

    #video-to-mp3-page .vtm-progress-percent {
        font-size: 0.9375rem;
    }

    #video-to-mp3-page .vtm-progress__description {
        font-size: 0.8125rem;
        margin-top: 0.75rem;
    }

    #video-to-mp3-page .vtm-audio-player__progress-wrapper {
        gap: 0.5rem;
    }

    #video-to-mp3-page .vtm-audio-player__time-display {
        min-width: 38px;
        font-size: 0.75rem;
    }

    #video-to-mp3-page .vtm-audio-player__controls {
        gap: 0.75rem;
    }

    #video-to-mp3-page .vtm-audio-player__btn {
        width: 40px;
        height: 40px;
    }

    #video-to-mp3-page .vtm-audio-player__btn--play {
        width: 56px;
        height: 56px;
    }

    #video-to-mp3-page .vtm-how-to-use {
        padding-top: 2rem;
        padding-bottom: 2rem;
    }

    #video-to-mp3-page .vtm-how-to-use__header {
        margin-bottom: 1rem;
        padding: 0 1rem;
    }

    #video-to-mp3-page .vtm-how-to-use__title {
        font-size: 1.75rem;
        margin-bottom: 1rem;
    }

    #video-to-mp3-page .vtm-how-to-use__subtitle {
        font-size: 1rem;
        line-height: 1.5;
    }

    #video-to-mp3-page .vtm-steps {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0;
    }

    #video-to-mp3-page .vtm-step__card {
        padding: 1.5rem;
    }

    #video-to-mp3-page .vtm-step__header {
        margin-bottom: 0.5rem;
    }

    #video-to-mp3-page .vtm-step:nth-child(1) .vtm-step__card:hover,
    #video-to-mp3-page .vtm-step:nth-child(2) .vtm-step__card:hover,
    #video-to-mp3-page .vtm-step:nth-child(3) .vtm-step__card:hover {
        border-color: #374151;
        transform: none;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
    }

    #video-to-mp3-page .vtm-step:nth-child(1) .vtm-step__card:hover .vtm-step__title,
    #video-to-mp3-page .vtm-step:nth-child(2) .vtm-step__card:hover .vtm-step__title,
    #video-to-mp3-page .vtm-step:nth-child(3) .vtm-step__card:hover .vtm-step__title {
        color: #ffffff;
    }

    #video-to-mp3-page .vtm-step__number {
        width: 3.5rem;
        height: 3.5rem;
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }

    #video-to-mp3-page .vtm-step__title {
        font-size: 1.25rem;
        margin-bottom: 0.75rem;
    }

    #video-to-mp3-page .vtm-step__description {
        font-size: 0.875rem;
        line-height: 1.5;
        padding: 0 0.5rem;
    }

    #video-to-mp3-page .vtm-faq-section {
        padding-top: 0;
        padding-bottom: 1rem;
    }

    #video-to-mp3-page .vtm-faq-section .content {
        padding: 0;
    }

    #video-to-mp3-page .vtm-faq-section__header {
        margin-bottom: 1rem;
    }

    #video-to-mp3-page .vtm-faq-section__title {
        font-size: 1.75rem;
        margin-bottom: 0.75rem;
    }

    #video-to-mp3-page .vtm-faq-section__subtitle {
        font-size: 1rem;
        line-height: 1.5;
    }

    #video-to-mp3-page .vtm-faq-wrapper {
        max-width: 100%;
    }

    #video-to-mp3-page .vtm-faq {
        padding: 1.25rem;
        margin: 0;
    }

    #video-to-mp3-page .vtm-faq:hover {
        border-color: #374151;
        background: linear-gradient(145deg, #000000 60%, #111827 100%);
        transform: none;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }

    #video-to-mp3-page .vtm-faq__button:hover .vtm-faq__question,
    #video-to-mp3-page .vtm-faq:hover .vtm-faq__question {
        color: #ffffff;
    }

    #video-to-mp3-page .vtm-faq__question {
        font-size: 1rem;
        margin-right: 0.75rem;
    }

    #video-to-mp3-page .vtm-faq__icon {
        width: 1.25rem;
        height: 1.25rem;
    }

    #video-to-mp3-page .vtm-faq__text {
        font-size: 0.875rem;
        line-height: 1.5;
    }
}