358 lines
6.7 KiB
Vue
358 lines
6.7 KiB
Vue
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<template>
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<div class="dns-resolution-demo">
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<h4 style="margin: 0 0 12px 0; color: #1a1a2e">
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🔍 DNS 解析过程模拟器
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</h4>
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<div class="input-row">
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<input
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v-model="domain"
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type="text"
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placeholder="输入域名，如 www.example.com"
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class="domain-input"
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@keyup.enter="startResolve"
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/>
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<button class="resolve-btn" :disabled="isResolving" @click="startResolve">
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{{ isResolving ? '解析中...' : '开始解析' }}
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</button>
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<button class="reset-btn" @click="reset">重置</button>
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</div>
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<div class="resolve-flow">
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<div
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v-for="(step, idx) in steps"
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:key="idx"
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class="step-card"
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:class="{
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active: currentStep === idx,
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done: currentStep > idx,
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pending: currentStep < idx
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}"
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>
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<div class="step-icon">{{ step.icon }}</div>
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<div class="step-label">{{ step.label }}</div>
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<div v-if="currentStep > idx" class="step-result">
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{{ step.result }}
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</div>
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<div v-if="currentStep === idx && isResolving" class="step-spinner">
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⏳
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</div>
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<div
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v-if="idx < steps.length - 1"
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class="arrow"
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:class="{ 'arrow-active': currentStep > idx }"
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>
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→
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</div>
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</div>
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</div>
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<div v-if="resolved" class="result-box">
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<div class="result-title">✅ 解析完成</div>
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<div class="result-detail">
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<span class="result-domain">{{ domain }}</span>
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→
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<span class="result-ip">{{ resolvedIp }}</span>
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</div>
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<div class="result-time">总耗时：约 {{ totalTime }}ms（模拟）</div>
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</div>
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<div class="info-box">
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<strong>解析流程说明：</strong>
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浏览器访问网站时，需要先将域名翻译成 IP
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地址。这个过程会依次查询多级缓存和服务器，直到找到对应的 IP。
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</div>
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</div>
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</template>
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<script setup>
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import { ref, reactive } from 'vue'
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const domain = ref('www.example.com')
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const isResolving = ref(false)
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const resolved = ref(false)
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const currentStep = ref(-1)
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const resolvedIp = ref('')
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const totalTime = ref(0)
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const steps = reactive([
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{
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icon: '🌐',
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label: '浏览器缓存',
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result: '未命中，继续查询...'
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},
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{
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icon: '💻',
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label: '操作系统缓存',
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result: '未命中，继续查询...'
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},
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{
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icon: '🔄',
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label: '递归解析器',
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result: '向根服务器发起查询...'
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},
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{
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icon: '🌍',
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label: '根域名服务器',
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result: '返回 .com TLD 服务器地址'
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},
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{
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icon: '📂',
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label: 'TLD 服务器',
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result: '返回权威服务器地址'
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},
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{
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icon: '🏠',
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label: '权威 DNS 服务器',
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result: ''
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}
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])
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function generateIp() {
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const a = 93 + Math.floor(Math.random() * 60)
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const b = Math.floor(Math.random() * 256)
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const c = Math.floor(Math.random() * 256)
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const d = 1 + Math.floor(Math.random() * 254)
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return `${a}.${b}.${c}.${d}`
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}
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async function startResolve() {
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if (isResolving.value || !domain.value.trim()) return
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isResolving.value = true
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resolved.value = false
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currentStep.value = -1
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const ip = generateIp()
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resolvedIp.value = ip
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steps[5].result = `找到记录！IP = ${ip}`
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const delays = [200, 300, 400, 500, 400, 300]
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let total = 0
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for (let i = 0; i < steps.length; i++) {
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currentStep.value = i
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await sleep(delays[i])
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total += delays[i]
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currentStep.value = i + 1
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}
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totalTime.value = total
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resolved.value = true
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isResolving.value = false
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}
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function reset() {
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isResolving.value = false
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resolved.value = false
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currentStep.value = -1
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resolvedIp.value = ''
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totalTime.value = 0
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}
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function sleep(ms) {
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return new Promise((resolve) => setTimeout(resolve, ms))
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}
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</script>
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<style scoped>
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.dns-resolution-demo {
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background: linear-gradient(135deg, #f0f4ff 0%, #e8f0fe 100%);
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border-radius: 12px;
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padding: 20px;
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margin: 16px 0;
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font-family: system-ui, sans-serif;
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}
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.input-row {
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display: flex;
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gap: 8px;
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margin-bottom: 20px;
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flex-wrap: wrap;
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}
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.domain-input {
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flex: 1;
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min-width: 200px;
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padding: 8px 14px;
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border: 2px solid #c5cae9;
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border-radius: 8px;
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font-size: 14px;
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outline: none;
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transition: border-color 0.2s;
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}
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.domain-input:focus {
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border-color: #5c6bc0;
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}
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.resolve-btn {
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padding: 8px 20px;
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background: #5c6bc0;
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color: #fff;
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border: none;
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border-radius: 8px;
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cursor: pointer;
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font-size: 14px;
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transition: background 0.2s;
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}
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.resolve-btn:hover:not(:disabled) {
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background: #3f51b5;
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}
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.resolve-btn:disabled {
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opacity: 0.6;
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cursor: not-allowed;
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}
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.reset-btn {
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padding: 8px 16px;
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background: #e0e0e0;
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color: #333;
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border: none;
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border-radius: 8px;
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cursor: pointer;
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font-size: 14px;
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}
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.reset-btn:hover {
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background: #bdbdbd;
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}
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.resolve-flow {
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display: flex;
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align-items: flex-start;
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gap: 4px;
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overflow-x: auto;
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padding: 10px 0;
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flex-wrap: wrap;
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justify-content: center;
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}
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.step-card {
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display: flex;
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flex-direction: column;
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align-items: center;
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padding: 12px 10px;
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border-radius: 10px;
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background: #fff;
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min-width: 100px;
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max-width: 120px;
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text-align: center;
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transition: all 0.3s;
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border: 2px solid transparent;
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position: relative;
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opacity: 0.5;
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}
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.step-card.active {
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border-color: #ff9800;
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background: #fff8e1;
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opacity: 1;
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transform: scale(1.05);
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box-shadow: 0 4px 12px rgba(255, 152, 0, 0.3);
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}
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.step-card.done {
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border-color: #4caf50;
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background: #e8f5e9;
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opacity: 1;
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}
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.step-card.pending {
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opacity: 0.4;
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}
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.step-icon {
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font-size: 28px;
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margin-bottom: 6px;
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}
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.step-label {
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font-size: 12px;
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font-weight: 600;
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color: #333;
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margin-bottom: 4px;
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}
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.step-result {
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font-size: 10px;
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color: #666;
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line-height: 1.3;
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}
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.step-spinner {
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font-size: 20px;
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animation: pulse 0.8s infinite;
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}
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@keyframes pulse {
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0%,
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100% {
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opacity: 1;
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}
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50% {
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opacity: 0.3;
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}
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}
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.arrow {
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position: absolute;
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right: -14px;
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top: 50%;
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transform: translateY(-50%);
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font-size: 18px;
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color: #ccc;
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font-weight: bold;
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z-index: 1;
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}
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.arrow-active {
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color: #4caf50;
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}
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.result-box {
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margin-top: 16px;
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padding: 14px 18px;
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background: #e8f5e9;
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border-radius: 10px;
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border: 1px solid #a5d6a7;
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}
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.result-title {
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font-weight: 700;
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color: #2e7d32;
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margin-bottom: 6px;
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}
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.result-detail {
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font-size: 15px;
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color: #333;
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}
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.result-domain {
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color: #5c6bc0;
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font-weight: 600;
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}
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.result-ip {
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color: #e65100;
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font-weight: 600;
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font-family: monospace;
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}
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.result-time {
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font-size: 12px;
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color: #888;
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margin-top: 4px;
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}
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.info-box {
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margin-top: 14px;
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padding: 10px 14px;
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background: #fff3e0;
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border-radius: 8px;
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font-size: 13px;
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color: #5d4037;
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line-height: 1.6;
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}
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</style>
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