diff --git a/src/features/generation-config/components/CreativeProfileSettings.vue b/src/features/generation-config/components/CreativeProfileSettings.vue
index 23a2e02..c6baf80 100644
--- a/src/features/generation-config/components/CreativeProfileSettings.vue
+++ b/src/features/generation-config/components/CreativeProfileSettings.vue
@@ -167,7 +167,7 @@ onScopeDispose(() => controller?.abort())
 </script>
 
 <template>
-    <NCollapse class="production-tool-section" :default-expanded-names="['creative-profile']">
+    <NCollapse class="production-tool-section creative-profile-settings" :default-expanded-names="['creative-profile']">
         <NCollapseItem name="creative-profile" title="项目画布与生成模型">
             <NSpin :show="loading">
                 <NAlert v-if="error" type="error" :show-icon="false" class="mb-3">{{ error }}</NAlert>
@@ -220,7 +220,7 @@ onScopeDispose(() => controller?.abort())
                         />
                     </section>
                 </div>
-                <div class="page-form-actions mt-4">
+                <div class="page-form-actions creative-profile-actions">
                     <NButton
                         type="primary"
                         :loading="saving"
@@ -238,11 +238,17 @@ onScopeDispose(() => controller?.abort())
 <style scoped>
 @reference "../../../styles/styles.css";
 .creative-profile-grid {
-    @apply grid grid-cols-[repeat(2,_minmax(0,_1fr))] gap-x-5;
+    @apply grid grid-cols-[repeat(2,_minmax(0,_1fr))] gap-x-5 gap-y-5;
 }
 .model-section {
     @apply min-w-0 p-4 bg-(--app-subtle);
 }
+.creative-profile-settings {
+    @apply mb-7;
+}
+.creative-profile-actions {
+    @apply mt-5 pt-1;
+}
 @media (max-width: 900px) {
     .creative-profile-grid {
         @apply grid-cols-[minmax(0,_1fr)];
diff --git a/src/features/generation-config/components/GenerationOptionFields.vue b/src/features/generation-config/components/GenerationOptionFields.vue
index 7c600eb..288122e 100644
--- a/src/features/generation-config/components/GenerationOptionFields.vue
+++ b/src/features/generation-config/components/GenerationOptionFields.vue
@@ -23,6 +23,45 @@ function selectOptions(schema: GenerationOptionSchema) {
             : []
     )
 }
+
+function isDuration(schema: GenerationOptionSchema) {
+    return /duration|时长/i.test(`${schema.key} ${schema.label}`)
+}
+
+function optionKey(value: string | number) {
+    return `${typeof value}:${value}`
+}
+
+/** 尺寸和时长使用有限选项，避免用户输入 Provider 不支持的自由值。 */
+function constrainedOptions(schema: GenerationOptionSchema, current: string | number | boolean | undefined) {
+    const options = selectOptions(schema)
+    if (schema.type === 'size') {
+        for (const value of ['1K', '1.5K', '2K']) options.push({ label: value, value })
+    } else if (
+        isDuration(schema) &&
+        Number.isInteger(schema.min) &&
+        Number.isInteger(schema.max) &&
+        schema.max! >= schema.min! &&
+        schema.max! - schema.min! <= 60
+    ) {
+        for (let value = schema.min!; value <= schema.max!; value++) {
+            options.push({ label: `${value} 秒`, value })
+        }
+    }
+    if (typeof schema.providerDefault === 'string' || typeof schema.providerDefault === 'number') {
+        options.push({ label: String(schema.providerDefault), value: schema.providerDefault })
+    }
+    if (typeof current === 'string' || typeof current === 'number') {
+        options.push({ label: String(current), value: current })
+    }
+    const seen = new Set<string>()
+    return options.filter(option => {
+        const key = optionKey(option.value)
+        if (seen.has(key)) return false
+        seen.add(key)
+        return true
+    })
+}
 </script>
 
 <template>
@@ -42,11 +81,11 @@ function selectOptions(schema: GenerationOptionSchema) {
                 >启用</NCheckbox
             >
             <NSelect
-                v-else-if="schema.type === 'select'"
+                v-else-if="schema.type === 'select' || schema.type === 'size' || isDuration(schema)"
                 :value="selectValue(modelValue[schema.key])"
-                :options="selectOptions(schema)"
+                :options="constrainedOptions(schema, modelValue[schema.key])"
                 :disabled="disabled"
-                clearable
+                :clearable="!schema.required"
                 @update:value="update(modelValue, schema.key, $event)"
             />
             <NInputNumber
@@ -75,8 +114,10 @@ function selectOptions(schema: GenerationOptionSchema) {
 <style scoped>
 @reference "../../../styles/styles.css";
 .generation-option-grid {
-    grid-template-columns: repeat(auto-fit, minmax(min(220px, 100%), 1fr));
-    @apply grid gap-x-5 gap-y-1;
+    @apply grid grid-cols-[repeat(2,_minmax(0,_1fr))] gap-x-4 gap-y-5;
+}
+.generation-option-grid :deep(.n-form-item) {
+    @apply min-w-0 mb-0;
 }
 @media (max-width: 760px) {
     .generation-option-grid {
diff --git a/tests/features/generation-config/options.test.ts b/tests/features/generation-config/options.test.ts
new file mode 100644
index 0000000..218925e
--- /dev/null
+++ b/tests/features/generation-config/options.test.ts
@@ -0,0 +1,53 @@
+import { mount } from '@vue/test-utils'
+import { NInputNumber, NSelect } from 'naive-ui'
+import { describe, expect, it } from 'vitest'
+import GenerationOptionFields from '../../../src/features/generation-config/components/GenerationOptionFields.vue'
+import type { GenerationOptionSchema } from '../../../src/features/generation-config/types'
+
+function mountFields(schemas: GenerationOptionSchema[]) {
+    return mount(GenerationOptionFields, {
+        props: { schemas, modelValue: { size: '2K', durationSeconds: 4, seed: 1 } }
+    })
+}
+
+describe('生成模型参数字段', () => {
+    it('图片尺寸使用下拉框并保留标准尺寸与当前值', () => {
+        const wrapper = mountFields([
+            { key: 'size', label: '图片尺寸', type: 'size', required: true, providerDefault: 'auto' }
+        ])
+        const select = wrapper.getComponent(NSelect)
+        expect(select.props('clearable')).toBe(false)
+        expect(select.props('options')).toEqual(
+            expect.arrayContaining([
+                expect.objectContaining({ value: '1K' }),
+                expect.objectContaining({ value: '1.5K' }),
+                expect.objectContaining({ value: '2K' }),
+                expect.objectContaining({ value: 'auto' })
+            ])
+        )
+        expect(wrapper.findComponent(NInputNumber).exists()).toBe(false)
+    })
+
+    it('视频时长按后端范围生成秒数选项，其他数值仍可输入', () => {
+        const wrapper = mountFields([
+            {
+                key: 'durationSeconds',
+                label: '生成时长',
+                type: 'integer',
+                required: true,
+                min: 4,
+                max: 6,
+                specialValues: [{ label: '自动', value: -1 }]
+            },
+            { key: 'seed', label: '随机种子', type: 'integer', required: false }
+        ])
+        const select = wrapper.getComponent(NSelect)
+        expect(select.props('options')).toEqual([
+            { label: '自动', value: -1 },
+            { label: '4 秒', value: 4 },
+            { label: '5 秒', value: 5 },
+            { label: '6 秒', value: 6 }
+        ])
+        expect(wrapper.findAllComponents(NInputNumber)).toHaveLength(1)
+    })
+})