* {
    box-sizing: border-box;
}

:root {
    --ink: #171923;
    --muted: #667085;
    --line: rgba(23, 25, 35, 0.1);
    --paper: #ffffff;
    --soft: #f7f8fb;
    --rose: #ff2d55;
    --orange: #ff7a1a;
    --blue: #2563eb;
    --green: #0f9f6e;
    --shadow: 0 18px 50px rgba(24, 32, 56, 0.12);
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    color: var(--ink);
    background:
        linear-gradient(180deg, #fff7f8 0%, #f7f8fb 34%, #eef6ff 100%);
}

button,
input,
select,
textarea {
    font: inherit;
}

button {
    -webkit-tap-highlight-color: transparent;
}

.xhs-app {
    width: min(1320px, calc(100% - 32px));
    margin: 0 auto;
    padding-bottom: 48px;
}

.product-topbar {
    position: sticky;
    top: 0;
    z-index: 10;
    margin: 0 calc((100% - 100vw) / 2);
    background: rgba(255, 255, 255, 0.76);
    border-bottom: 1px solid rgba(255, 255, 255, 0.82);
    backdrop-filter: blur(18px);
}

.product-topbar-inner {
    width: min(1320px, calc(100% - 32px));
    min-height: 64px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.product-name {
    font-weight: 900;
    font-size: 15px;
    letter-spacing: 0;
}

.product-tagline {
    margin-top: 2px;
    color: var(--muted);
    font-size: 12px;
}

.product-nav {
    display: flex;
    gap: 10px;
    align-items: center;
}

.product-nav a,
.secondary-button,
.prompt-header button {
    min-height: 38px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.9);
    color: var(--ink);
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.product-nav a:hover,
.secondary-button:hover,
.prompt-header button:hover {
    border-color: rgba(255, 45, 85, 0.3);
    box-shadow: 0 8px 24px rgba(24, 32, 56, 0.08);
    transform: translateY(-1px);
}

.product-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 28px;
    align-items: end;
    padding: 42px 0 28px;
}

.product-kicker {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    margin: 0 0 12px;
    padding: 0 12px;
    border: 1px solid rgba(255, 45, 85, 0.18);
    border-radius: 8px;
    background: rgba(255, 45, 85, 0.08);
    color: #d91f48;
    font-size: 13px;
    font-weight: 900;
}

.product-hero h1 {
    margin: 0;
    max-width: 790px;
    font-size: 44px;
    line-height: 1.12;
    letter-spacing: 0;
}

.product-hero p {
    margin: 16px 0 0;
    max-width: 760px;
    color: #4b5563;
    font-size: 16px;
    line-height: 1.85;
}

.product-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.product-stats div {
    min-height: 78px;
    padding: 15px 16px;
    border: 1px solid rgba(255, 255, 255, 0.86);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.76);
    box-shadow: 0 12px 34px rgba(24, 32, 56, 0.08);
}

.product-stats span {
    display: block;
    color: var(--muted);
    font-size: 12px;
    font-weight: 700;
}

.product-stats strong {
    display: block;
    margin-top: 8px;
    color: var(--ink);
    font-size: 17px;
    line-height: 1.25;
}

.workspace {
    display: grid;
    grid-template-columns: 430px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}

.control-panel,
.preview-panel,
.prompt-panel,
.publish-panel {
    border: 1px solid rgba(255, 255, 255, 0.88);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.82);
    box-shadow: var(--shadow);
}

.control-panel {
    position: sticky;
    top: 84px;
    padding: 22px;
}

.panel-header h2,
.prompt-header h2 {
    margin: 0;
    font-size: 18px;
    font-weight: 900;
    letter-spacing: 0;
}

.panel-header p {
    margin: 7px 0 18px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
}

.template-strip {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 16px;
}

.template-card {
    min-height: 82px;
    padding: 13px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--paper);
    color: var(--ink);
    text-align: left;
    cursor: pointer;
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.template-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 26px rgba(24, 32, 56, 0.1);
}

.template-card strong,
.template-card span {
    display: block;
}

.template-card strong {
    font-size: 14px;
    font-weight: 900;
}

.template-card span {
    margin-top: 6px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.45;
}

.template-card.active {
    border-color: rgba(255, 45, 85, 0.38);
    background: linear-gradient(180deg, #fff5f7 0%, #ffffff 100%);
    box-shadow: 0 0 0 3px rgba(255, 45, 85, 0.1), 0 10px 28px rgba(255, 45, 85, 0.1);
}

.field-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.field {
    display: grid;
    gap: 7px;
    margin-bottom: 14px;
}

.field span,
.ratio-field legend {
    color: #344054;
    font-size: 13px;
    font-weight: 800;
}

.field input,
.field select,
.field textarea,
#promptOutput,
#noteOutput {
    width: 100%;
    border: 1px solid rgba(23, 25, 35, 0.12);
    border-radius: 8px;
    background: #ffffff;
    color: var(--ink);
    padding: 12px 13px;
    outline: none;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.field textarea,
#promptOutput,
#noteOutput {
    resize: vertical;
    line-height: 1.7;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
    border-color: rgba(255, 45, 85, 0.55);
    box-shadow: 0 0 0 4px rgba(255, 45, 85, 0.12);
}

.ratio-field {
    display: flex;
    gap: 9px;
    flex-wrap: wrap;
    margin: 0 0 16px;
    padding: 0;
    border: 0;
}

.ratio-field legend {
    width: 100%;
    margin-bottom: 4px;
}

.ratio-field label {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 36px;
    padding: 0 11px;
    border: 1px solid rgba(23, 25, 35, 0.12);
    border-radius: 8px;
    background: #ffffff;
    font-size: 13px;
    cursor: pointer;
}

.ratio-field input {
    accent-color: var(--rose);
}

.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
    transform: none;
}

.workbench-button {
    border-color: rgba(37, 99, 235, 0.22);
    background: rgba(37, 99, 235, 0.08);
}

.compact-actions {
    margin-bottom: 16px;
}

.primary-button {
    min-height: 42px;
    padding: 0 17px;
    border: 0;
    border-radius: 8px;
    background: linear-gradient(135deg, #ff2d55 0%, #ff7a1a 100%);
    color: #ffffff;
    font-weight: 900;
    cursor: pointer;
    box-shadow: 0 12px 28px rgba(255, 45, 85, 0.22);
    transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.primary-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 16px 34px rgba(255, 45, 85, 0.28);
}

.secondary-button {
    min-height: 42px;
}

.status-line {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 12px;
}

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

.workbench-hint {
    margin: 12px 0 10px;
    color: var(--muted);
    font-size: 12px;
    line-height: 1.65;
}

.preview-panel {
    padding: 18px;
}

.canvas-shell {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 700px;
    padding: 28px;
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(255, 45, 85, 0.08), rgba(37, 99, 235, 0.08)),
        #f2f4f8;
    overflow: hidden;
}

.canvas-shell::before {
    content: "实时预览";
    position: absolute;
    top: 16px;
    left: 18px;
    min-height: 30px;
    padding: 6px 10px;
    border: 1px solid rgba(23, 25, 35, 0.08);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.82);
    color: #344054;
    font-size: 12px;
    font-weight: 800;
}

#coverCanvas {
    width: min(100%, 470px);
    height: auto;
    max-height: 82vh;
    border-radius: 8px;
    box-shadow:
        0 24px 70px rgba(24, 32, 56, 0.22),
        0 0 0 10px rgba(255, 255, 255, 0.68);
    background: #fff;
}

.generated-panel,
.prompt-panel,
.publish-panel {
    margin-top: 16px;
    padding: 16px;
    box-shadow: 0 12px 32px rgba(24, 32, 56, 0.08);
}

.generated-panel {
    margin-top: 0;
    margin-bottom: 16px;
}

.generated-image-frame {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 420px;
    border: 1px dashed rgba(23, 25, 35, 0.16);
    border-radius: 8px;
    background:
        linear-gradient(135deg, rgba(255, 45, 85, 0.06), rgba(37, 99, 235, 0.08)),
        #f8fafc;
    overflow: hidden;
}

.generated-image-frame img {
    display: block;
    width: min(100%, 470px);
    max-height: 72vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow:
        0 24px 70px rgba(24, 32, 56, 0.2),
        0 0 0 10px rgba(255, 255, 255, 0.72);
}

.generated-empty {
    width: min(100% - 32px, 360px);
    padding: 20px;
    border: 1px solid rgba(23, 25, 35, 0.08);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.84);
    color: var(--muted);
    font-size: 13px;
    line-height: 1.7;
    text-align: center;
}

.prompt-header {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
}

#promptOutput {
    min-height: 150px;
    color: #374151;
    background: #ffffff;
}

.title-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 12px;
}

.title-option {
    padding: 11px 12px;
    border: 1px solid rgba(23, 25, 35, 0.1);
    border-radius: 8px;
    background: #ffffff;
    color: var(--ink);
    text-align: left;
    cursor: pointer;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.title-option:hover {
    border-color: rgba(255, 45, 85, 0.32);
    box-shadow: 0 8px 22px rgba(24, 32, 56, 0.08);
    transform: translateY(-1px);
}

.title-option strong {
    display: block;
    margin-bottom: 3px;
    color: #e11d48;
    font-size: 12px;
}

.title-option span {
    display: block;
    font-size: 14px;
    line-height: 1.45;
}

#noteOutput {
    min-height: 230px;
    color: #374151;
}

@media (max-width: 1080px) {
    .product-hero,
    .workspace {
        grid-template-columns: 1fr;
    }

    .control-panel {
        position: static;
    }

    .canvas-shell {
        min-height: auto;
    }
}

@media (max-width: 640px) {
    .xhs-app {
        width: min(100% - 20px, 1320px);
    }

    .product-topbar-inner {
        min-height: auto;
        padding: 12px 0;
        flex-direction: column;
        align-items: flex-start;
    }

    .product-hero {
        padding-top: 26px;
    }

    .product-hero h1 {
        font-size: 30px;
    }

    .field-grid,
    .actions,
    .template-strip,
    .title-options {
        grid-template-columns: 1fr;
    }

    .actions button {
        width: 100%;
    }

    .canvas-shell {
        padding: 20px 10px 12px;
    }
}