diff --git a/康康/App/KangkangApp.swift b/康康/App/KangkangApp.swift
index 4fed669..d23d3d7 100644
--- a/康康/App/KangkangApp.swift
+++ b/康康/App/KangkangApp.swift
@@ -10,6 +10,7 @@ struct KangkangApp: App {
             DiaryEntry.self,
             Asset.self,
             ChatTurn.self,
+            Symptom.self,
         ])
         let config = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false)
         do {
diff --git a/康康/Features/Archive/ArchiveListView.swift b/康康/Features/Archive/ArchiveListView.swift
new file mode 100644
index 0000000..1bd2280
--- /dev/null
+++ b/康康/Features/Archive/ArchiveListView.swift
@@ -0,0 +1,19 @@
+import SwiftUI
+
+struct ArchiveListView: View {
+    var body: some View {
+        VStack(spacing: 12) {
+            Spacer()
+            TjPlaceholder(label: "records · 记录列表\n（C1 尚未实现）")
+                .frame(width: 280, height: 180)
+            Text("记录")
+                .font(.tjH2())
+                .foregroundStyle(Tj.Palette.text2)
+            Spacer()
+        }
+        .frame(maxWidth: .infinity, maxHeight: .infinity)
+        .background(Tj.Palette.sand.ignoresSafeArea())
+    }
+}
+
+#Preview { ArchiveListView() }
diff --git a/康康/Features/Home/HomeView.swift b/康康/Features/Home/HomeView.swift
index 6860007..a9d9ed0 100644
--- a/康康/Features/Home/HomeView.swift
+++ b/康康/Features/Home/HomeView.swift
@@ -10,6 +10,9 @@ struct HomeView: View {
                     .padding(.top, 4)
                     .padding(.bottom, 18)
 
+                OngoingSymptomsCard()
+                    .padding(.bottom, 18)
+
                 todaySummaryCard
                     .padding(.bottom, 18)
 
diff --git a/康康/Features/Record/RecordSheet.swift b/康康/Features/Record/RecordSheet.swift
index ce7a0a6..dd5d5cb 100644
--- a/康康/Features/Record/RecordSheet.swift
+++ b/康康/Features/Record/RecordSheet.swift
@@ -1,7 +1,7 @@
 import SwiftUI
 
 enum RecordKind: String, Identifiable, CaseIterable {
-    case quick, archive, diary
+    case quick, archive, diary, symptom
     var id: String { rawValue }
 
     var title: String {
@@ -9,13 +9,15 @@ enum RecordKind: String, Identifiable, CaseIterable {
         case .quick:   return "异常项快拍"
         case .archive: return "关键报告归档"
         case .diary:   return "文字日记"
+        case .symptom: return "症状开始"
         }
     }
     var subtitle: String {
         switch self {
         case .quick:   return "只记录单个或几项异常指标"
         case .archive: return "完整保存整份报告（可多页）"
-        case .diary:   return "记录症状、心情、用药"
+        case .diary:   return "记录心情、用药、其他"
+        case .symptom: return "开始一个持续症状，结束时再点结束"
         }
     }
     var icon: String {
@@ -23,6 +25,7 @@ enum RecordKind: String, Identifiable, CaseIterable {
         case .quick:   return "camera.fill"
         case .archive: return "doc.fill"
         case .diary:   return "pencil"
+        case .symptom: return "waveform.path.ecg"
         }
     }
     var accent: Color {
@@ -30,6 +33,7 @@ enum RecordKind: String, Identifiable, CaseIterable {
         case .quick:   return Tj.Palette.brick
         case .archive: return Tj.Palette.ink
         case .diary:   return Tj.Palette.leaf
+        case .symptom: return Tj.Palette.amber
         }
     }
 }
@@ -98,7 +102,7 @@ struct RecordSheet: View {
                 .clipShape(RoundedRectangle(cornerRadius: Tj.Radius.xl, style: .continuous))
                 .ignoresSafeArea(edges: .bottom)
         )
-        .presentationDetents([.fraction(0.55)])
+        .presentationDetents([.fraction(0.68)])
         .presentationDragIndicator(.hidden)
         .presentationBackground(Tj.Palette.sand)
         .presentationCornerRadius(Tj.Radius.xl)
diff --git a/康康/Features/Symptom/OngoingSymptomsCard.swift b/康康/Features/Symptom/OngoingSymptomsCard.swift
new file mode 100644
index 0000000..2881277
--- /dev/null
+++ b/康康/Features/Symptom/OngoingSymptomsCard.swift
@@ -0,0 +1,117 @@
+import SwiftUI
+import SwiftData
+import Combine
+
+struct OngoingSymptomsCard: View {
+    @Query(filter: #Predicate<Symptom> { $0.endedAt == nil },
+           sort: \Symptom.startedAt, order: .reverse)
+    private var ongoing: [Symptom]
+
+    @State private var ending: Symptom?
+    @State private var tick: Date = .now
+
+    private let timer = Timer.publish(every: 60, on: .main, in: .common).autoconnect()
+
+    var body: some View {
+        if ongoing.isEmpty {
+            EmptyView()
+        } else {
+            VStack(alignment: .leading, spacing: 10) {
+                HStack(spacing: 8) {
+                    Circle()
+                        .fill(Tj.Palette.brick)
+                        .frame(width: 7, height: 7)
+                    Text("持续中")
+                        .font(.tjH2())
+                        .foregroundStyle(Tj.Palette.text)
+                    Text("\(ongoing.count) 个")
+                        .font(.system(size: 12))
+                        .foregroundStyle(Tj.Palette.text3)
+                    Spacer()
+                }
+
+                VStack(spacing: 8) {
+                    ForEach(ongoing) { sym in
+                        row(sym)
+                    }
+                }
+            }
+            .onReceive(timer) { now in tick = now }
+            .sheet(item: $ending) { sym in
+                SymptomEndSheet(symptom: sym)
+            }
+        }
+    }
+
+    private func row(_ sym: Symptom) -> some View {
+        let interval = max(0, tick.timeIntervalSince(sym.startedAt))
+        let isLong = interval >= 3 * 24 * 3600
+
+        return HStack(spacing: 12) {
+            VStack(alignment: .leading, spacing: 4) {
+                HStack(spacing: 8) {
+                    Text(sym.name)
+                        .font(.system(size: 15, weight: .semibold))
+                        .foregroundStyle(Tj.Palette.text)
+                    severityDot(sym.severity)
+                }
+                Text("已持续 \(formatDuration(interval))")
+                    .font(.system(size: 12))
+                    .foregroundStyle(isLong ? Tj.Palette.brick : Tj.Palette.text3)
+            }
+            Spacer(minLength: 8)
+            Button {
+                ending = sym
+            } label: {
+                Text("结束")
+                    .font(.system(size: 12, weight: .semibold))
+                    .foregroundStyle(Tj.Palette.text)
+                    .padding(.horizontal, 12)
+                    .padding(.vertical, 6)
+                    .background(
+                        Capsule().fill(Tj.Palette.sand2)
+                    )
+            }
+            .buttonStyle(.plain)
+        }
+        .padding(.horizontal, 14)
+        .padding(.vertical, 12)
+        .background(
+            RoundedRectangle(cornerRadius: Tj.Radius.sm, style: .continuous)
+                .fill(Tj.Palette.paper)
+                .overlay(alignment: .leading) {
+                    Rectangle()
+                        .fill(severityColor(sym.severity))
+                        .frame(width: 3)
+                        .clipShape(
+                            UnevenRoundedRectangle(
+                                topLeadingRadius: Tj.Radius.sm,
+                                bottomLeadingRadius: Tj.Radius.sm,
+                                bottomTrailingRadius: 0,
+                                topTrailingRadius: 0
+                            )
+                        )
+                }
+        )
+        .shadow(color: Color(red: 0.196, green: 0.157, blue: 0.098).opacity(0.04),
+                radius: 2, x: 0, y: 1)
+    }
+
+    private func severityDot(_ value: Int) -> some View {
+        HStack(spacing: 2) {
+            ForEach(1...5, id: \.self) { i in
+                Circle()
+                    .fill(i <= value ? severityColor(value) : Tj.Palette.line)
+                    .frame(width: 5, height: 5)
+            }
+        }
+    }
+
+    private func severityColor(_ value: Int) -> Color {
+        switch value {
+        case 1, 2: return Tj.Palette.leaf
+        case 3:    return Tj.Palette.amber
+        default:   return Tj.Palette.brick
+        }
+    }
+}
diff --git a/康康/Features/Symptom/SymptomEndSheet.swift b/康康/Features/Symptom/SymptomEndSheet.swift
new file mode 100644
index 0000000..5521fcd
--- /dev/null
+++ b/康康/Features/Symptom/SymptomEndSheet.swift
@@ -0,0 +1,119 @@
+import SwiftUI
+import SwiftData
+
+struct SymptomEndSheet: View {
+    @Environment(\.modelContext) private var ctx
+    @Environment(\.dismiss) private var dismiss
+
+    let symptom: Symptom
+
+    @State private var endedAt: Date = .now
+
+    private var lowerBound: Date { symptom.startedAt }
+
+    private var durationLabel: String {
+        let interval = max(0, endedAt.timeIntervalSince(lowerBound))
+        return formatDuration(interval)
+    }
+
+    var body: some View {
+        VStack(spacing: 0) {
+            Capsule()
+                .fill(Tj.Palette.line)
+                .frame(width: 40, height: 4)
+                .padding(.top, 10)
+                .padding(.bottom, 14)
+
+            VStack(alignment: .leading, spacing: 18) {
+                HStack {
+                    VStack(alignment: .leading, spacing: 4) {
+                        Text("结束症状")
+                            .font(.system(size: 12, weight: .semibold))
+                            .tracking(0.3)
+                            .foregroundStyle(Tj.Palette.text3)
+                        Text(symptom.name)
+                            .font(.tjTitle(24))
+                            .foregroundStyle(Tj.Palette.text)
+                    }
+                    Spacer()
+                }
+
+                VStack(alignment: .leading, spacing: 6) {
+                    Text("开始于")
+                        .font(.system(size: 12))
+                        .foregroundStyle(Tj.Palette.text3)
+                    Text(symptom.startedAt.formatted(date: .abbreviated, time: .shortened))
+                        .font(.system(size: 14, weight: .medium))
+                        .foregroundStyle(Tj.Palette.text)
+                }
+
+                VStack(alignment: .leading, spacing: 8) {
+                    Text("结束时间")
+                        .font(.system(size: 12, weight: .semibold))
+                        .tracking(0.3)
+                        .foregroundStyle(Tj.Palette.text2)
+                    DatePicker("", selection: $endedAt, in: lowerBound...Date.now)
+                        .datePickerStyle(.compact)
+                        .labelsHidden()
+                }
+
+                HStack {
+                    Text("本次持续")
+                        .font(.system(size: 13))
+                        .foregroundStyle(Tj.Palette.text3)
+                    Spacer()
+                    Text(durationLabel)
+                        .font(.system(size: 15, weight: .semibold, design: .monospaced))
+                        .foregroundStyle(Tj.Palette.brick)
+                }
+                .padding(.horizontal, 14)
+                .padding(.vertical, 12)
+                .background(
+                    RoundedRectangle(cornerRadius: Tj.Radius.sm, style: .continuous)
+                        .fill(Tj.Palette.paper)
+                )
+
+                Spacer(minLength: 8)
+            }
+            .padding(.horizontal, 20)
+
+            HStack(spacing: 12) {
+                Button("取消") { dismiss() }
+                    .buttonStyle(TjGhostButton(height: 44, fontSize: 15, horizontalPadding: 18))
+                Button("结束并保存") { submit() }
+                    .buttonStyle(TjPrimaryButton(height: 44, fontSize: 15, horizontalPadding: 18))
+            }
+            .padding(.horizontal, 20)
+            .padding(.vertical, 14)
+        }
+        .background(
+            Tj.Palette.sand
+                .clipShape(RoundedRectangle(cornerRadius: Tj.Radius.xl, style: .continuous))
+                .ignoresSafeArea(edges: .bottom)
+        )
+        .presentationDetents([.medium])
+        .presentationDragIndicator(.hidden)
+        .presentationBackground(Tj.Palette.sand)
+        .presentationCornerRadius(Tj.Radius.xl)
+    }
+
+    private func submit() {
+        symptom.endedAt = max(endedAt, symptom.startedAt)
+        try? ctx.save()
+        dismiss()
+    }
+}
+
+func formatDuration(_ interval: TimeInterval) -> String {
+    let totalMinutes = Int(interval / 60)
+    let days = totalMinutes / (60 * 24)
+    let hours = (totalMinutes % (60 * 24)) / 60
+    let minutes = totalMinutes % 60
+
+    if days > 0 && hours > 0 { return "\(days) 天 \(hours) 小时" }
+    if days > 0 { return "\(days) 天" }
+    if hours > 0 && minutes > 0 { return "\(hours) 小时 \(minutes) 分" }
+    if hours > 0 { return "\(hours) 小时" }
+    if minutes > 0 { return "\(minutes) 分钟" }
+    return "刚刚"
+}
diff --git a/康康/Features/Symptom/SymptomStartSheet.swift b/康康/Features/Symptom/SymptomStartSheet.swift
new file mode 100644
index 0000000..4ab8733
--- /dev/null
+++ b/康康/Features/Symptom/SymptomStartSheet.swift
@@ -0,0 +1,231 @@
+import SwiftUI
+import SwiftData
+
+private let symptomPresets: [String] = [
+    "头痛", "咳嗽", "腹痛", "发烧",
+    "恶心", "失眠", "疲劳", "关节痛"
+]
+
+struct SymptomStartSheet: View {
+    @Environment(\.modelContext) private var ctx
+    @Environment(\.dismiss) private var dismiss
+
+    @State private var name: String = ""
+    @State private var customName: String = ""
+    @State private var startedAt: Date = .now
+    @State private var severity: Double = 3
+    @State private var note: String = ""
+
+    private var resolvedName: String {
+        let trimmed = customName.trimmingCharacters(in: .whitespaces)
+        return trimmed.isEmpty ? name : trimmed
+    }
+
+    private var canSubmit: Bool { !resolvedName.isEmpty }
+
+    var body: some View {
+        VStack(spacing: 0) {
+            handle
+            header
+
+            ScrollView(showsIndicators: false) {
+                VStack(alignment: .leading, spacing: 18) {
+                    presetSection
+                    customSection
+                    timeSection
+                    severitySection
+                    noteSection
+                }
+                .padding(.horizontal, 20)
+                .padding(.bottom, 20)
+            }
+
+            footer
+        }
+        .background(
+            Tj.Palette.sand
+                .clipShape(RoundedRectangle(cornerRadius: Tj.Radius.xl, style: .continuous))
+                .ignoresSafeArea(edges: .bottom)
+        )
+        .presentationDetents([.large])
+        .presentationDragIndicator(.hidden)
+        .presentationBackground(Tj.Palette.sand)
+        .presentationCornerRadius(Tj.Radius.xl)
+    }
+
+    private var handle: some View {
+        Capsule()
+            .fill(Tj.Palette.line)
+            .frame(width: 40, height: 4)
+            .padding(.top, 10)
+            .padding(.bottom, 14)
+    }
+
+    private var header: some View {
+        HStack {
+            Text("症状开始")
+                .font(.tjH2())
+                .foregroundStyle(Tj.Palette.text)
+            Spacer()
+            Text("结束时再来点结束")
+                .font(.system(size: 12))
+                .foregroundStyle(Tj.Palette.text3)
+        }
+        .padding(.horizontal, 20)
+        .padding(.bottom, 16)
+    }
+
+    private var presetSection: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            sectionLabel("常见症状")
+            ScrollView(.horizontal, showsIndicators: false) {
+                HStack(spacing: 8) {
+                    ForEach(symptomPresets, id: \.self) { item in
+                        chip(item, selected: name == item) {
+                            name = item
+                            customName = ""
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+    private var customSection: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            sectionLabel("或者自己写")
+            TextField("例如：眼皮跳", text: $customName)
+                .textInputAutocapitalization(.never)
+                .padding(.horizontal, 14)
+                .padding(.vertical, 12)
+                .background(
+                    RoundedRectangle(cornerRadius: Tj.Radius.sm, style: .continuous)
+                        .fill(Tj.Palette.paper)
+                )
+                .overlay(
+                    RoundedRectangle(cornerRadius: Tj.Radius.sm, style: .continuous)
+                        .strokeBorder(Tj.Palette.line, lineWidth: 1)
+                )
+                .onChange(of: customName) { _, newValue in
+                    if !newValue.trimmingCharacters(in: .whitespaces).isEmpty {
+                        name = ""
+                    }
+                }
+        }
+    }
+
+    private var timeSection: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            sectionLabel("开始时间")
+            DatePicker("", selection: $startedAt, in: ...Date.now)
+                .datePickerStyle(.compact)
+                .labelsHidden()
+        }
+    }
+
+    private var severitySection: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            HStack {
+                sectionLabel("强度")
+                Spacer()
+                Text("\(Int(severity)) / 5")
+                    .font(.system(size: 13, weight: .semibold, design: .monospaced))
+                    .foregroundStyle(severityColor)
+            }
+            Slider(value: $severity, in: 1...5, step: 1)
+                .tint(severityColor)
+            HStack {
+                Text("轻微").font(.system(size: 11)).foregroundStyle(Tj.Palette.text3)
+                Spacer()
+                Text("剧烈").font(.system(size: 11)).foregroundStyle(Tj.Palette.text3)
+            }
+        }
+    }
+
+    private var noteSection: some View {
+        VStack(alignment: .leading, spacing: 8) {
+            sectionLabel("备注（可选）")
+            TextField("位置、可能诱因…", text: $note, axis: .vertical)
+                .lineLimit(2...4)
+                .padding(.horizontal, 14)
+                .padding(.vertical, 12)
+                .background(
+                    RoundedRectangle(cornerRadius: Tj.Radius.sm, style: .continuous)
+                        .fill(Tj.Palette.paper)
+                )
+                .overlay(
+                    RoundedRectangle(cornerRadius: Tj.Radius.sm, style: .continuous)
+                        .strokeBorder(Tj.Palette.line, lineWidth: 1)
+                )
+        }
+    }
+
+    private var footer: some View {
+        HStack(spacing: 12) {
+            Button("取消") { dismiss() }
+                .buttonStyle(TjGhostButton(height: 44, fontSize: 15, horizontalPadding: 18))
+            Button("开始记录") { submit() }
+                .buttonStyle(TjPrimaryButton(height: 44, fontSize: 15, horizontalPadding: 18))
+                .disabled(!canSubmit)
+                .opacity(canSubmit ? 1 : 0.4)
+        }
+        .padding(.horizontal, 20)
+        .padding(.vertical, 14)
+        .background(
+            Tj.Palette.sand
+                .overlay(alignment: .top) {
+                    Rectangle().fill(Tj.Palette.lineSoft).frame(height: 1)
+                }
+        )
+    }
+
+    private var severityColor: Color {
+        switch Int(severity) {
+        case 1, 2: return Tj.Palette.leaf
+        case 3:    return Tj.Palette.amber
+        default:   return Tj.Palette.brick
+        }
+    }
+
+    private func sectionLabel(_ text: String) -> some View {
+        Text(text)
+            .font(.system(size: 12, weight: .semibold))
+            .tracking(0.3)
+            .foregroundStyle(Tj.Palette.text2)
+    }
+
+    private func chip(_ label: String, selected: Bool, action: @escaping () -> Void) -> some View {
+        Button(action: action) {
+            Text(label)
+                .font(.system(size: 13, weight: selected ? .semibold : .regular))
+                .foregroundStyle(selected ? Tj.Palette.paper : Tj.Palette.text)
+                .padding(.horizontal, 14)
+                .padding(.vertical, 8)
+                .background(
+                    Capsule().fill(selected ? Tj.Palette.ink : Tj.Palette.paper)
+                )
+                .overlay(
+                    Capsule().strokeBorder(Tj.Palette.line, lineWidth: selected ? 0 : 1)
+                )
+        }
+        .buttonStyle(.plain)
+    }
+
+    private func submit() {
+        guard canSubmit else { return }
+        let symptom = Symptom(
+            name: resolvedName,
+            startedAt: startedAt,
+            note: note.trimmingCharacters(in: .whitespaces).isEmpty ? nil : note,
+            severity: Int(severity)
+        )
+        ctx.insert(symptom)
+        try? ctx.save()
+        dismiss()
+    }
+}
+
+#Preview {
+    SymptomStartSheet()
+        .modelContainer(for: Symptom.self, inMemory: true)
+}
diff --git a/康康/Models/Models.swift b/康康/Models/Models.swift
index 45809a3..317c85b 100644
--- a/康康/Models/Models.swift
+++ b/康康/Models/Models.swift
@@ -131,6 +131,39 @@ final class Asset {
     }
 }
 
+@Model
+final class Symptom {
+    var name: String
+    var startedAt: Date
+    var endedAt: Date?
+    var note: String?
+    var severity: Int
+    var tags: [String]
+    var createdAt: Date
+
+    init(name: String,
+         startedAt: Date = .now,
+         endedAt: Date? = nil,
+         note: String? = nil,
+         severity: Int = 3,
+         tags: [String] = [],
+         createdAt: Date = .now) {
+        self.name = name
+        self.startedAt = startedAt
+        self.endedAt = endedAt
+        self.note = note
+        self.severity = max(1, min(5, severity))
+        self.tags = tags
+        self.createdAt = createdAt
+    }
+
+    var isOngoing: Bool { endedAt == nil }
+
+    var duration: TimeInterval {
+        (endedAt ?? .now).timeIntervalSince(startedAt)
+    }
+}
+
 @Model
 final class ChatTurn {
     var question: String
diff --git a/康康/RootView.swift b/康康/RootView.swift
index 14d935e..110b67f 100644
--- a/康康/RootView.swift
+++ b/康康/RootView.swift
@@ -1,19 +1,21 @@
 import SwiftUI
 
 enum TjTab: String, Hashable, CaseIterable {
-    case home, trend, me
+    case home, records, trend, me
     var label: String {
         switch self {
-        case .home:  return "首页"
-        case .trend: return "趋势"
-        case .me:    return "我的"
+        case .home:    return "主页"
+        case .records: return "记录"
+        case .trend:   return "趋势"
+        case .me:      return "我的"
         }
     }
     var icon: String {
         switch self {
-        case .home:  return "house"
-        case .trend: return "chart.line.uptrend.xyaxis"
-        case .me:    return "person.circle"
+        case .home:    return "house"
+        case .records: return "list.bullet.rectangle"
+        case .trend:   return "chart.line.uptrend.xyaxis"
+        case .me:      return "person.circle"
         }
     }
 }
@@ -27,14 +29,16 @@ struct RootView: View {
     @State private var tab: TjTab = .home
     @State private var showRecordSheet = false
     @State private var activeFlow: ActiveFlow?
+    @State private var showSymptomStart = false
 
     var body: some View {
         VStack(spacing: 0) {
             Group {
                 switch tab {
-                case .home:  HomeView(onTapArchive: {})
-                case .trend: TrendsView()
-                case .me:    MeView()
+                case .home:    HomeView(onTapArchive: { tab = .records })
+                case .records: ArchiveListView()
+                case .trend:   TrendsView()
+                case .me:      MeView()
                 }
             }
             .frame(maxWidth: .infinity, maxHeight: .infinity)
@@ -51,11 +55,15 @@ struct RootView: View {
                     switch kind {
                     case .quick:   activeFlow = .quick
                     case .archive: activeFlow = .archive
+                    case .symptom: showSymptomStart = true
                     case .diary:   break
                     }
                 }
             }
         }
+        .sheet(isPresented: $showSymptomStart) {
+            SymptomStartSheet()
+        }
 #if os(iOS)
         .fullScreenCover(item: $activeFlow) { flow in
             switch flow {
@@ -83,66 +91,101 @@ private struct TabBar: View {
     let onTap: (TjTab) -> Void
     let onTapRecord: () -> Void
 
+    private let cornerRadius: CGFloat = 22
+    private let slotHeight: CGFloat = 34
+
     var body: some View {
-        HStack(spacing: 0) {
+        HStack(alignment: .bottom, spacing: 0) {
             tabItem(.home)
-            Color.clear.frame(width: 60, height: 1)
+            tabItem(.records)
+            recordSlot
             tabItem(.trend)
             tabItem(.me)
         }
-        .padding(.horizontal, 12)
+        .padding(.horizontal, 4)
         .padding(.top, 10)
-        .padding(.bottom, 4)
-        .background(
-            Tj.Palette.paper
-                .overlay(alignment: .top) {
-                    Rectangle()
-                        .fill(Tj.Palette.lineSoft)
-                        .frame(height: 1)
-                }
+        .padding(.bottom, 6)
+        .background(barBackground)
+    }
+
+    private var barBackground: some View {
+        UnevenRoundedRectangle(
+            topLeadingRadius: cornerRadius,
+            bottomLeadingRadius: 0,
+            bottomTrailingRadius: 0,
+            topTrailingRadius: cornerRadius,
+            style: .continuous
         )
+        .fill(Tj.Palette.paper)
         .overlay(alignment: .top) {
-            recordButton.offset(y: -22)
+            Rectangle()
+                .fill(Tj.Palette.lineSoft)
+                .frame(height: 1)
         }
+        .shadow(color: Tj.Palette.ink.opacity(0.05), radius: 10, x: 0, y: -2)
     }
 
     private func tabItem(_ t: TjTab) -> some View {
-        Button { onTap(t) } label: {
+        let isActive = active == t
+        return Button { onTap(t) } label: {
             VStack(spacing: 4) {
-                Image(systemName: t.icon)
-                    .font(.system(size: 20, weight: .regular))
-                    .frame(width: 26, height: 26)
+                ZStack {
+                    if isActive {
+                        Capsule()
+                            .fill(Tj.Palette.sand2)
+                            .frame(width: 44, height: slotHeight - 6)
+                    }
+                    Image(systemName: t.icon)
+                        .font(.system(size: 18, weight: isActive ? .semibold : .regular))
+                }
+                .frame(width: 50, height: slotHeight)
+
                 Text(t.label)
-                    .font(.system(size: 11))
+                    .font(.system(size: 11, weight: isActive ? .semibold : .regular))
             }
-            .foregroundStyle(active == t ? Tj.Palette.ink : Tj.Palette.text3)
+            .foregroundStyle(isActive ? Tj.Palette.ink : Tj.Palette.text3)
             .frame(maxWidth: .infinity)
-            .padding(.vertical, 4)
             .contentShape(Rectangle())
         }
-        .buttonStyle(.plain)
+        .buttonStyle(TabPressStyle())
     }
 
-    private var recordButton: some View {
+    private var recordSlot: some View {
         Button(action: onTapRecord) {
             VStack(spacing: 4) {
                 ZStack {
                     Circle()
                         .fill(Tj.Palette.ink)
-                        .shadow(color: Color(red: 0.157, green: 0.216, blue: 0.176).opacity(0.25),
-                                radius: 12, x: 0, y: 4)
+                        .overlay(
+                            Circle()
+                                .strokeBorder(Tj.Palette.paper, lineWidth: 2)
+                        )
+                        .shadow(color: Tj.Palette.ink.opacity(0.18),
+                                radius: 4, x: 0, y: 2)
+
                     Image(systemName: "plus")
-                        .font(.system(size: 20, weight: .semibold))
+                        .font(.system(size: 16, weight: .semibold))
                         .foregroundStyle(Tj.Palette.paper)
                 }
-                .frame(width: 52, height: 52)
+                .frame(width: slotHeight, height: slotHeight)
 
-                Text("记录")
-                    .font(.system(size: 11))
+                Text("新建")
+                    .font(.system(size: 11, weight: .semibold))
                     .foregroundStyle(Tj.Palette.ink)
             }
+            .frame(maxWidth: .infinity)
+            .contentShape(Rectangle())
         }
-        .buttonStyle(.plain)
+        .buttonStyle(TabPressStyle())
+    }
+}
+
+private struct TabPressStyle: ButtonStyle {
+    func makeBody(configuration: Configuration) -> some View {
+        configuration.label
+            .scaleEffect(configuration.isPressed ? 0.92 : 1.0)
+            .animation(.spring(response: 0.25, dampingFraction: 0.7),
+                       value: configuration.isPressed)
     }
 }
 
diff --git a/康康Tests/ModelsSchemaTests.swift b/康康Tests/ModelsSchemaTests.swift
index 884d07d..dbdea48 100644
--- a/康康Tests/ModelsSchemaTests.swift
+++ b/康康Tests/ModelsSchemaTests.swift
@@ -12,6 +12,7 @@ struct ModelsSchemaTests {
             DiaryEntry.self,
             Asset.self,
             ChatTurn.self,
+            Symptom.self,
         ])
         let config = ModelConfiguration(schema: schema, isStoredInMemoryOnly: true)
         return try ModelContainer(for: schema, configurations: [config])
@@ -58,6 +59,37 @@ struct ModelsSchemaTests {
         #expect(remaining.isEmpty)
     }
 
+    @Test func ongoingSymptomQueryFiltersByEndedAt() throws {
+        let container = try makeContainer()
+        let ctx = ModelContext(container)
+
+        let active = Symptom(name: "头痛", startedAt: .now.addingTimeInterval(-3600))
+        let ended = Symptom(
+            name: "咳嗽",
+            startedAt: .now.addingTimeInterval(-7200),
+            endedAt: .now.addingTimeInterval(-1800)
+        )
+        ctx.insert(active)
+        ctx.insert(ended)
+        try ctx.save()
+
+        let predicate = #Predicate<Symptom> { $0.endedAt == nil }
+        let ongoing = try ctx.fetch(FetchDescriptor<Symptom>(predicate: predicate))
+
+        #expect(ongoing.count == 1)
+        #expect(ongoing.first?.name == "头痛")
+        #expect(active.isOngoing)
+        #expect(!ended.isOngoing)
+        #expect(active.duration >= 3600)
+    }
+
+    @Test func symptomSeverityClampedToRange() throws {
+        let high = Symptom(name: "腹痛", severity: 99)
+        let low = Symptom(name: "失眠", severity: -3)
+        #expect(high.severity == 5)
+        #expect(low.severity == 1)
+    }
+
     @Test func chatTurnPersistsReferencedIDs() throws {
         let container = try makeContainer()
         let ctx = ModelContext(container)