:root {
    --kwd-purple: #855be8;
    --kwd-purple-hover: #7b42d9;
    --kwd-cyan: #00b6d8;
    --kwd-text: #111827;
    --kwd-muted: #6b7280;
    --kwd-border: #e5e7eb;
    --kwd-bg: #f9fafb;
    --kwd-white: #ffffff;
    --kwd-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

* {
    box-sizing: border-box;
}

body.kwd-page {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--kwd-text);
    background: var(--kwd-bg);
    -webkit-font-smoothing: antialiased;
}

.kwd-wrap {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.kwd-nav {
    background: var(--kwd-white);
    box-shadow: var(--kwd-shadow);
    position: sticky;
    top: 0;
    z-index: 50;
}

.kwd-nav-inner {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 16px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.kwd-brand {
    text-decoration: none;
    font-size: 20px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0;
}

.kwd-brand-img {
    display: block;
    height: 36px;
    max-width: 200px;
    width: auto;
    object-fit: contain;
}

.kwd-brand-a {
    color: var(--kwd-purple);
}

.kwd-brand-b {
    color: var(--kwd-cyan);
}

.kwd-nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-end;
}

.kwd-nav-tag {
    font-size: 13px;
    color: var(--kwd-muted);
    padding: 4px 10px;
    border-radius: 999px;
    background: #f3f4f6;
}

.kwd-main {
    flex: 1;
    max-width: 1120px;
    margin: 0 auto;
    padding: 48px 16px 64px;
    width: 100%;
}

.kwd-hero {
    text-align: center;
    margin-bottom: 32px;
}

.kwd-hero-title {
    margin: 0;
    font-size: clamp(28px, 5vw, 42px);
    font-weight: 700;
    line-height: 1.2;
}

.kwd-hero-sub {
    margin: 12px auto 0;
    max-width: 720px;
    color: var(--kwd-muted);
    font-size: 16px;
    line-height: 1.6;
}

.kwd-parser {
    max-width: 560px;
    margin: 0 auto 40px;
}

.kwd-alert {
    margin-bottom: 12px;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 14px;
    background: #fef2f2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

.kwd-alert.is-success {
    background: #ecfdf5;
    color: #047857;
    border-color: #a7f3d0;
}

.kwd-input-row {
    display: flex;
    box-shadow: var(--kwd-shadow);
    border-radius: 8px;
    overflow: hidden;
}

.kwd-input {
    flex: 1;
    min-width: 0;
    border: 1px solid var(--kwd-border);
    border-radius: 8px;
    padding: 14px 16px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.kwd-input:focus {
    border-color: var(--kwd-purple);
    box-shadow: 0 0 0 3px rgba(133, 91, 232, 0.15);
}

.kwd-actions {
    margin-top: 16px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 8px;
}

.kwd-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.2s, transform 0.15s, opacity 0.2s;
}

.kwd-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.kwd-btn-primary {
    color: #fff;
    background: var(--kwd-purple);
}

.kwd-btn-primary:hover:not(:disabled) {
    background: var(--kwd-purple-hover);
}

.kwd-btn-secondary {
    color: #374151;
    background: var(--kwd-white);
    border-color: #d1d5db;
}

.kwd-btn-secondary:hover:not(:disabled) {
    background: #f9fafb;
}

.kwd-btn-download {
    color: #fff;
    background: linear-gradient(135deg, var(--kwd-purple), var(--kwd-cyan));
    text-decoration: none;
}

.kwd-btn-download:hover {
    opacity: 0.92;
    text-decoration: none;
    color: #fff;
}

.kwd-alert[hidden],
.kwd-loading[hidden],
.kwd-result[hidden] {
    display: none !important;
}

.kwd-loading {
    margin-top: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: var(--kwd-muted);
    font-size: 14px;
}

.kwd-spinner {
    width: 18px;
    height: 18px;
    border: 2px solid #e5e7eb;
    border-top-color: var(--kwd-purple);
    border-radius: 50%;
    animation: kwd-spin 0.8s linear infinite;
}

@keyframes kwd-spin {
    to { transform: rotate(360deg); }
}

.kwd-result {
    max-width: 720px;
    margin: 0 auto 48px;
    background: var(--kwd-white);
    border: 1px solid var(--kwd-border);
    border-radius: 12px;
    padding: 20px;
    box-shadow: var(--kwd-shadow);
}

.kwd-result-head {
    display: flex;
    gap: 16px;
    align-items: flex-start;
    margin-bottom: 16px;
}

.kwd-result-cover {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    object-fit: cover;
    background: #f3f4f6;
    flex-shrink: 0;
}

.kwd-result-meta h3 {
    margin: 0 0 8px;
    font-size: 18px;
    line-height: 1.4;
}

.kwd-result-meta p {
    margin: 0;
    font-size: 14px;
    color: var(--kwd-muted);
}

.kwd-result-platform {
    display: inline-block;
    margin-bottom: 8px;
    padding: 2px 10px;
    border-radius: 999px;
    font-size: 12px;
    color: var(--kwd-purple);
    background: rgba(133, 91, 232, 0.1);
}

.kwd-media-list {
    display: grid;
    gap: 12px;
}

.kwd-media-item {
    border: 1px solid var(--kwd-border);
    border-radius: 10px;
    padding: 14px;
    background: #fafafa;
}

.kwd-media-item h4 {
    margin: 0 0 10px;
    font-size: 15px;
}

.kwd-media-preview {
    margin-bottom: 12px;
    border-radius: 8px;
    overflow: hidden;
    background: #000;
    position: relative;
}

.kwd-live-badge {
    position: absolute;
    top: 10px;
    left: 10px;
    z-index: 2;
    padding: 2px 8px;
    border-radius: 999px;
    font-size: 12px;
    line-height: 1.5;
    color: #fff;
    background: rgba(236, 72, 153, 0.92);
}

.kwd-image-fallback {
    margin: 0;
    padding: 10px 12px;
    font-size: 13px;
    color: #fbbf24;
    background: rgba(0, 0, 0, 0.65);
}

.kwd-media-preview img,
.kwd-media-preview video {
    display: block;
    width: 100%;
    max-height: 360px;
    object-fit: contain;
}

.kwd-video-fallback {
    margin: 0;
    padding: 10px 12px;
    font-size: 13px;
    color: #fbbf24;
    background: rgba(0, 0, 0, 0.65);
}

.kwd-btn-download[disabled] {
    opacity: 0.65;
    cursor: not-allowed;
}

.kwd-result.is-downloading .kwd-btn-download:not([disabled]) {
    pointer-events: none;
}

.kwd-media-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.kwd-features {
    margin: 48px 0;
}

.kwd-feature-grid {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.kwd-feature-card {
    background: var(--kwd-white);
    border: 1px solid #f3f4f6;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    box-shadow: var(--kwd-shadow);
    transition: box-shadow 0.2s;
}

.kwd-feature-card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.kwd-feature-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f3ff;
}

.kwd-feature-icon svg {
    width: 28px;
    height: 28px;
}

.kwd-icon-pink svg { color: #db2777; }
.kwd-icon-blue svg { color: #2563eb; }
.kwd-icon-purple svg { color: var(--kwd-purple); }
.kwd-icon-green svg { color: #16a34a; }

.kwd-feature-card h3 {
    margin: 0 0 8px;
    font-size: 17px;
}

.kwd-feature-card p {
    margin: 0;
    font-size: 14px;
    color: var(--kwd-muted);
}

.kwd-section {
    margin: 48px 0;
}

.kwd-section h2 {
    text-align: center;
    font-size: 24px;
    margin: 0 0 24px;
}

.kwd-steps {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.kwd-step {
    background: var(--kwd-white);
    border: 1px solid #f3f4f6;
    border-radius: 10px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.kwd-step strong {
    font-size: 15px;
}

.kwd-step span {
    font-size: 13px;
    color: var(--kwd-muted);
}

.kwd-type-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.kwd-type-card {
    background: var(--kwd-white);
    border: 1px solid #f3f4f6;
    border-radius: 10px;
    padding: 18px;
}

.kwd-type-card h3 {
    margin: 0 0 8px;
    font-size: 16px;
}

.kwd-type-card p {
    margin: 0;
    font-size: 14px;
    color: var(--kwd-muted);
}

.kwd-faq-item {
    background: var(--kwd-white);
    border-radius: 10px;
    margin-bottom: 12px;
    box-shadow: var(--kwd-shadow);
    overflow: hidden;
}

.kwd-faq-item summary {
    padding: 16px 20px;
    cursor: pointer;
    font-weight: 600;
    list-style: none;
}

.kwd-faq-item summary::-webkit-details-marker {
    display: none;
}

.kwd-faq-item p {
    margin: 0;
    padding: 0 20px 16px;
    color: var(--kwd-muted);
    font-size: 14px;
    line-height: 1.6;
}

.kwd-footer {
    background: #f3f4f6;
    padding: 40px 16px;
    text-align: center;
}

.kwd-footer p {
    margin: 0;
    color: #9ca3af;
}

.kwd-footer-note {
    margin-top: 8px !important;
    font-size: 12px;
}

@media (max-width: 640px) {
    .kwd-nav-links {
        display: none;
    }

    .kwd-actions {
        grid-template-columns: 1fr;
    }

    .kwd-result-head {
        flex-direction: column;
    }

    .kwd-result-cover {
        width: 100%;
        height: auto;
        max-height: 200px;
    }
}