feat: 시즌별 마케팅 + 공지사항 관리 기능 추가

- 연간 세무 캘린더(7개 시즌) 기반 자동 Hero 섹션 전환
- 시즌 감지 시 D-Day 카운트다운, 긴박감 배지, 시즌 CTA 표시
- 서비스 카드 순서 시즌 관련 항목 우선 정렬
- 어드민 공지사항 CRUD (등록·수정·삭제, 기간·유형 설정)
- 홈페이지 상단 공지 배너 자동 노출 (일반/배너/긴급)
- CLAUDE.md에 세무 캘린더 및 마케팅 방향 하네스 추가

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -744,6 +744,55 @@ SELECT * FROM inquiries ORDER BY created_at DESC LIMIT 1;
 
 ---
 
+---
+
+## 13. 시즌별 마케팅 (Seasonal Marketing)
+
+### 13.1 핵심 방향
+
+세무사 사무실은 **1년 중 특정 시기에 특정 고객이 집중**된다. 홈페이지는 이 시기마다 자동으로 전환되어야 한다.
+
+**목표**: 방문자가 접속한 날짜에 맞는 세무 이벤트를 즉시 인지하고 상담 신청으로 전환
+
+**전환 방식**:
+- Hero 섹션 헤드라인과 CTA가 시즌에 맞게 변경됨
+- 마감 D-7일 이내에는 긴박감 메시지 추가 표시
+- 시즌 관련 서비스 카드가 맨 앞으로 이동
+- 최종 CTA도 시즌 문구로 전환
+- 관리자가 별도 공지사항을 등록하면 모든 페이지 최상단에 배너로 노출
+
+### 13.2 연간 세무 캘린더
+
+| 기간 | 이벤트 | Key | 타깃 서비스 |
+|------|--------|-----|-------------|
+| 1/1 ~ 1/25 | 부가가치세 2기 확정신고 | `vat-2nd` | business-tax |
+| 1/15 ~ 2/28 | 연말정산 | `year-end-settlement` | business-tax |
+| 3/1 ~ 3/31 | 법인세 신고 | `corporate-tax` | business-tax |
+| 5/1 ~ 5/31 | **종합소득세 신고** (연중 최대 피크) | `income-tax` | business-tax |
+| 7/1 ~ 7/25 | 부가가치세 1기 확정신고 | `vat-1st` | business-tax |
+| 11/15 ~ 11/30 | 종합부동산세 납부 | `comprehensive-real-estate-tax` | real-estate-tax |
+| 12/1 ~ 12/31 | 연말 증여·절세 플래닝 | `year-end-gift` | family-asset |
+
+캘린더 정의 위치: `TaxBaik.Application/Seasonal/TaxSeasonCalendar.cs`
+
+시즌 추가/수정은 이 파일만 변경하면 된다. DB·마이그레이션 변경 없음.
+
+### 13.3 공지사항 (Announcement)
+
+어드민 `/taxbaik/admin/announcements`에서 관리.
+
+- **유형**: 일반(info, 파란색) / 배너(banner, 주황색) / 긴급(urgent, 빨간색)
+- **게시 기간**: 시작일~종료일 설정 가능. 비우면 즉시~무기한
+- **노출 위치**: 홈페이지 최상단 (공지 배너 스트립)
+- **우선순위**: sort_order 내림차순
+
+공지사항은 시즌 Hero와 독립적으로 동작한다. 동시 표시 가능.
+
+### 13.4 시즌 우선순위 / 광고 규칙 준수
+
+- 허용: "지금 신고 준비하세요", "마감 전 사전 검토", "D-N일 남았습니다"
+- 금지: "100% 절세 보장", "최저가 신고", "무료"
+
 **마지막 체크리스트:**
 - [ ] 솔루션 빌드 성공 (`dotnet build`)
 - [ ] 모든 프로젝트 참조 정확

TaxBaik.Application/DTOs/AnnouncementDto.cs

@@ -0,0 +1,13 @@
+namespace TaxBaik.Application.DTOs;
+
+public class AnnouncementDto
+{
+    public int Id { get; set; }
+    public string Title { get; set; } = "";
+    public string? Content { get; set; }
+    public string DisplayType { get; set; } = "info";
+    public bool IsActive { get; set; } = true;
+    public DateTime? StartsAt { get; set; }
+    public DateTime? EndsAt { get; set; }
+    public int SortOrder { get; set; }
+}

TaxBaik.Application/DependencyInjection.cs

@@ -13,6 +13,8 @@ public static class DependencyInjection
         services.AddScoped<IInquiryNotificationService, NoopInquiryNotificationService>();
         services.AddScoped<SiteSettingService>();
         services.AddScoped<CategoryService>();
+        services.AddScoped<AnnouncementService>();
+        services.AddSingleton<SeasonalMarketingService>();
         return services;
     }
 }

TaxBaik.Application/Seasonal/CurrentSeasonDto.cs

@@ -0,0 +1,14 @@
+namespace TaxBaik.Application.Seasonal;
+
+public record CurrentSeasonDto
+{
+    public string Key { get; init; } = "";
+    public string Name { get; init; } = "";
+    public string HeroHeadline { get; init; } = "";
+    public string HeroSubtext { get; init; } = "";
+    public string UrgencyBadge { get; init; } = "";
+    public string FocusService { get; init; } = "";
+    public string CtaText { get; init; } = "상담 신청하기";
+    public int DaysUntilDeadline { get; init; }
+    public DateTime Deadline { get; init; }
+}

TaxBaik.Application/Seasonal/TaxSeason.cs

@@ -0,0 +1,18 @@
+namespace TaxBaik.Application.Seasonal;
+
+public record TaxSeason
+{
+    public string Key { get; init; } = "";
+    public string Name { get; init; } = "";
+
+    public int StartMonth { get; init; }
+    public int StartDay { get; init; }
+    public int EndMonth { get; init; }
+    public int EndDay { get; init; }
+
+    public string HeroHeadline { get; init; } = "";
+    public string HeroSubtext { get; init; } = "";
+    public string UrgencyBadge { get; init; } = "";
+    public string FocusService { get; init; } = "";
+    public string CtaText { get; init; } = "상담 신청하기";
+}

TaxBaik.Application/Seasonal/TaxSeasonCalendar.cs

@@ -0,0 +1,96 @@
+namespace TaxBaik.Application.Seasonal;
+
+/// <summary>
+/// 한국 세무사 사무실 연간 시즌 캘린더.
+/// 각 시즌이 활성화되면 홈페이지 Hero가 해당 세무 이벤트에 맞게 전환된다.
+/// </summary>
+public static class TaxSeasonCalendar
+{
+    public static readonly IReadOnlyList<TaxSeason> Seasons =
+    [
+        new TaxSeason
+        {
+            Key = "vat-2nd",
+            Name = "부가가치세 2기 확정신고",
+            StartMonth = 1, StartDay = 1,
+            EndMonth = 1, EndDay = 25,
+            HeroHeadline = "부가가치세 2기\n1월 25일 마감",
+            HeroSubtext = "일반과세 사업자 확정신고 · 기한 내 신고로 가산세 방지",
+            UrgencyBadge = "D-{n}일 | 부가세 마감",
+            FocusService = "business-tax",
+            CtaText = "부가세 신고 상담"
+        },
+        new TaxSeason
+        {
+            Key = "year-end-settlement",
+            Name = "연말정산",
+            StartMonth = 1, StartDay = 15,
+            EndMonth = 2, EndDay = 28,
+            HeroHeadline = "연말정산\n지금 준비하세요",
+            HeroSubtext = "직원이 있는 사업자 원천징수 신고 · 환급 최대화",
+            UrgencyBadge = "연말정산 진행 중",
+            FocusService = "business-tax",
+            CtaText = "연말정산 상담"
+        },
+        new TaxSeason
+        {
+            Key = "corporate-tax",
+            Name = "법인세 신고",
+            StartMonth = 3, StartDay = 1,
+            EndMonth = 3, EndDay = 31,
+            HeroHeadline = "법인세\n3월 31일 마감",
+            HeroSubtext = "법인사업자 결산 · 세무조정 · 절세 전략 수립",
+            UrgencyBadge = "D-{n}일 | 법인세 마감",
+            FocusService = "business-tax",
+            CtaText = "법인세 신고 상담"
+        },
+        new TaxSeason
+        {
+            Key = "income-tax",
+            Name = "종합소득세 신고",
+            StartMonth = 5, StartDay = 1,
+            EndMonth = 5, EndDay = 31,
+            HeroHeadline = "종합소득세\n5월 31일 마감",
+            HeroSubtext = "개인사업자 · 임대소득 · 프리랜서 · 기타소득 모두 해당",
+            UrgencyBadge = "D-{n}일 | 종합소득세 마감",
+            FocusService = "business-tax",
+            CtaText = "종합소득세 상담"
+        },
+        new TaxSeason
+        {
+            Key = "vat-1st",
+            Name = "부가가치세 1기 확정신고",
+            StartMonth = 7, StartDay = 1,
+            EndMonth = 7, EndDay = 25,
+            HeroHeadline = "부가가치세 1기\n7월 25일 마감",
+            HeroSubtext = "일반과세 사업자 1기 확정신고 · 매입세액 공제 점검",
+            UrgencyBadge = "D-{n}일 | 부가세 마감",
+            FocusService = "business-tax",
+            CtaText = "부가세 신고 상담"
+        },
+        new TaxSeason
+        {
+            Key = "comprehensive-real-estate-tax",
+            Name = "종합부동산세",
+            StartMonth = 11, StartDay = 15,
+            EndMonth = 11, EndDay = 30,
+            HeroHeadline = "종합부동산세\n납부 시즌",
+            HeroSubtext = "다주택자 · 임대사업자 세부담 분석 · 분납·합산배제 검토",
+            UrgencyBadge = "D-{n}일 | 종부세 납부",
+            FocusService = "real-estate-tax",
+            CtaText = "종부세 절세 상담"
+        },
+        new TaxSeason
+        {
+            Key = "year-end-gift",
+            Name = "연말 증여·절세 플래닝",
+            StartMonth = 12, StartDay = 1,
+            EndMonth = 12, EndDay = 31,
+            HeroHeadline = "연말 절세 플래닝\n마지막 기회",
+            HeroSubtext = "증여 공제 한도 · 자산 이전 · 법인전환 연간 마감",
+            UrgencyBadge = "D-{n}일 | 연간 증여 한도 마감",
+            FocusService = "family-asset",
+            CtaText = "연말 절세 상담"
+        }
+    ];
+}

TaxBaik.Application/Services/AnnouncementService.cs

@@ -0,0 +1,44 @@
+namespace TaxBaik.Application.Services;
+
+using TaxBaik.Application.DTOs;
+using TaxBaik.Domain.Entities;
+using TaxBaik.Domain.Interfaces;
+
+public class AnnouncementService(IAnnouncementRepository repository)
+{
+    public Task<IEnumerable<Announcement>> GetActiveAsync(CancellationToken ct = default)
+        => repository.GetActiveAsync(ct);
+
+    public Task<IEnumerable<Announcement>> GetAllAsync(CancellationToken ct = default)
+        => repository.GetAllAsync(ct);
+
+    public Task<Announcement?> GetByIdAsync(int id, CancellationToken ct = default)
+        => repository.GetByIdAsync(id, ct);
+
+    public Task<int> CreateAsync(AnnouncementDto dto, CancellationToken ct = default)
+    {
+        var entity = MapToEntity(dto);
+        return repository.CreateAsync(entity, ct);
+    }
+
+    public Task UpdateAsync(AnnouncementDto dto, CancellationToken ct = default)
+    {
+        var entity = MapToEntity(dto);
+        return repository.UpdateAsync(entity, ct);
+    }
+
+    public Task DeleteAsync(int id, CancellationToken ct = default)
+        => repository.DeleteAsync(id, ct);
+
+    private static Announcement MapToEntity(AnnouncementDto dto) => new()
+    {
+        Id = dto.Id,
+        Title = dto.Title.Trim(),
+        Content = string.IsNullOrWhiteSpace(dto.Content) ? null : dto.Content.Trim(),
+        DisplayType = dto.DisplayType,
+        IsActive = dto.IsActive,
+        StartsAt = dto.StartsAt,
+        EndsAt = dto.EndsAt,
+        SortOrder = dto.SortOrder
+    };
+}

TaxBaik.Application/Services/SeasonalMarketingService.cs

@@ -0,0 +1,38 @@
+namespace TaxBaik.Application.Services;
+
+using TaxBaik.Application.Seasonal;
+
+public class SeasonalMarketingService
+{
+    public CurrentSeasonDto? GetCurrentSeason()
+    {
+        var today = DateTime.Today;
+
+        foreach (var season in TaxSeasonCalendar.Seasons)
+        {
+            var start = new DateTime(today.Year, season.StartMonth, season.StartDay);
+            var end = new DateTime(today.Year, season.EndMonth, season.EndDay);
+
+            if (today >= start && today <= end)
+            {
+                var days = (end - today).Days;
+                return new CurrentSeasonDto
+                {
+                    Key = season.Key,
+                    Name = season.Name,
+                    HeroHeadline = season.HeroHeadline,
+                    HeroSubtext = season.HeroSubtext,
+                    UrgencyBadge = season.UrgencyBadge.Replace("{n}", days.ToString()),
+                    FocusService = season.FocusService,
+                    CtaText = season.CtaText,
+                    DaysUntilDeadline = days,
+                    Deadline = end
+                };
+            }
+        }
+
+        return null;
+    }
+
+    public IReadOnlyList<TaxSeason> GetFullCalendar() => TaxSeasonCalendar.Seasons;
+}

TaxBaik.Domain/Entities/Announcement.cs

@@ -0,0 +1,15 @@
+namespace TaxBaik.Domain.Entities;
+
+public class Announcement
+{
+    public int Id { get; set; }
+    public string Title { get; set; } = null!;
+    public string? Content { get; set; }
+    public string DisplayType { get; set; } = "info";
+    public bool IsActive { get; set; }
+    public DateTime? StartsAt { get; set; }
+    public DateTime? EndsAt { get; set; }
+    public int SortOrder { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public DateTime UpdatedAt { get; set; }
+}

TaxBaik.Domain/Interfaces/IAnnouncementRepository.cs

@@ -0,0 +1,13 @@
+namespace TaxBaik.Domain.Interfaces;
+
+using TaxBaik.Domain.Entities;
+
+public interface IAnnouncementRepository
+{
+    Task<IEnumerable<Announcement>> GetActiveAsync(CancellationToken cancellationToken = default);
+    Task<IEnumerable<Announcement>> GetAllAsync(CancellationToken cancellationToken = default);
+    Task<Announcement?> GetByIdAsync(int id, CancellationToken cancellationToken = default);
+    Task<int> CreateAsync(Announcement announcement, CancellationToken cancellationToken = default);
+    Task UpdateAsync(Announcement announcement, CancellationToken cancellationToken = default);
+    Task DeleteAsync(int id, CancellationToken cancellationToken = default);
+}

TaxBaik.Infrastructure/DependencyInjection.cs

@@ -15,6 +15,7 @@ public static class DependencyInjection
         services.AddScoped<IBlogPostRepository, BlogPostRepository>();
         services.AddScoped<IInquiryRepository, InquiryRepository>();
         services.AddScoped<ISiteSettingRepository, SiteSettingRepository>();
+        services.AddScoped<IAnnouncementRepository, AnnouncementRepository>();
 
         return services;
     }

TaxBaik.Infrastructure/Repositories/AnnouncementRepository.cs

@@ -0,0 +1,74 @@
+namespace TaxBaik.Infrastructure.Repositories;
+
+using Dapper;
+using TaxBaik.Domain.Entities;
+using TaxBaik.Domain.Interfaces;
+
+public class AnnouncementRepository(IDbConnectionFactory connectionFactory)
+    : BaseRepository(connectionFactory), IAnnouncementRepository
+{
+    private const string SelectColumns =
+        "id, title, content, display_type, is_active, starts_at, ends_at, sort_order, created_at, updated_at";
+
+    public async Task<IEnumerable<Announcement>> GetActiveAsync(CancellationToken cancellationToken = default)
+    {
+        using var conn = Conn();
+        return await conn.QueryAsync<Announcement>(
+            $@"SELECT {SelectColumns}
+               FROM announcements
+               WHERE is_active = TRUE
+                 AND (starts_at IS NULL OR starts_at <= NOW())
+                 AND (ends_at   IS NULL OR ends_at   >= NOW())
+               ORDER BY sort_order DESC, created_at DESC");
+    }
+
+    public async Task<IEnumerable<Announcement>> GetAllAsync(CancellationToken cancellationToken = default)
+    {
+        using var conn = Conn();
+        return await conn.QueryAsync<Announcement>(
+            $"SELECT {SelectColumns} FROM announcements ORDER BY sort_order DESC, created_at DESC");
+    }
+
+    public async Task<Announcement?> GetByIdAsync(int id, CancellationToken cancellationToken = default)
+    {
+        using var conn = Conn();
+        return await conn.QueryFirstOrDefaultAsync<Announcement>(
+            $"SELECT {SelectColumns} FROM announcements WHERE id = @Id",
+            new { Id = id });
+    }
+
+    public async Task<int> CreateAsync(Announcement announcement, CancellationToken cancellationToken = default)
+    {
+        using var conn = Conn();
+        return await conn.QueryFirstAsync<int>(
+            @"INSERT INTO announcements
+                (title, content, display_type, is_active, starts_at, ends_at, sort_order, created_at, updated_at)
+              VALUES
+                (@Title, @Content, @DisplayType, @IsActive, @StartsAt, @EndsAt, @SortOrder, NOW(), NOW())
+              RETURNING id",
+            announcement);
+    }
+
+    public async Task UpdateAsync(Announcement announcement, CancellationToken cancellationToken = default)
+    {
+        using var conn = Conn();
+        await conn.ExecuteAsync(
+            @"UPDATE announcements
+              SET title        = @Title,
+                  content      = @Content,
+                  display_type = @DisplayType,
+                  is_active    = @IsActive,
+                  starts_at    = @StartsAt,
+                  ends_at      = @EndsAt,
+                  sort_order   = @SortOrder,
+                  updated_at   = NOW()
+              WHERE id = @Id",
+            announcement);
+    }
+
+    public async Task DeleteAsync(int id, CancellationToken cancellationToken = default)
+    {
+        using var conn = Conn();
+        await conn.ExecuteAsync("DELETE FROM announcements WHERE id = @Id", new { Id = id });
+    }
+}

TaxBaik.Web/Components/Admin/App.razor

@@ -9,6 +9,11 @@
     <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700&display=swap" rel="stylesheet" />
     <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet" />
     <link href="_content/MudBlazor/MudBlazor.min.css" rel="stylesheet" />
+    <script>
+        document.documentElement.classList.toggle(
+            'admin-login-route',
+            window.location.pathname.toLowerCase().endsWith('/admin/login'));
+    </script>
     <link rel="stylesheet" href="/taxbaik/css/admin.css" />
     <component type="typeof(HeadOutlet)" render-mode="InteractiveServer" />
 </head>

TaxBaik.Web/Components/Admin/InquiryTable.razor

@@ -1,7 +1,7 @@
 @using TaxBaik.Application.Services
 @inject InquiryService InquiryService
 
-<MudSimpleTable Striped="true" Dense="true" Class="mt-4">
+<MudSimpleTable Striped="true" Dense="true" Class="admin-table mt-4">
     <thead>
         <tr>
             <th>이름</th>

TaxBaik.Web/Components/Admin/Layout/MainLayout.razor

@@ -1,24 +1,60 @@
 @inherits LayoutComponentBase
 
-<MudLayout>
-    <MudAppBar Elevation="1">
-        <MudText Typo="Typo.h6" Class="ml-3">백원숙 세무회계 관리자</MudText>
+<MudLayout Class="admin-shell">
+    <MudAppBar Elevation="0" Class="admin-topbar">
+        <MudIconButton Icon="@Icons.Material.Filled.Menu"
+                       Color="Color.Inherit"
+                       Edge="Edge.Start"
+                       Class="admin-menu-button"
+                       OnClick="@ToggleDrawer" />
+        <div class="admin-topbar-title">
+            <MudText Typo="Typo.caption">TaxBaik Backoffice</MudText>
+            <MudText Typo="Typo.h6">백원숙 세무회계 관리자</MudText>
+        </div>
         <MudSpacer />
-        <MudButton Color="Color.Inherit" Href="/taxbaik">공개 사이트</MudButton>
-        <MudButton Href="/taxbaik/admin/logout">로그아웃</MudButton>
+        <MudButton Class="admin-topbar-action"
+                   Variant="Variant.Outlined"
+                   Color="Color.Inherit"
+                   StartIcon="@Icons.Material.Filled.OpenInNew"
+                   Href="/taxbaik">
+            공개 사이트
+        </MudButton>
+        <MudButton Class="admin-topbar-action"
+                   Variant="Variant.Filled"
+                   Color="Color.Primary"
+                   StartIcon="@Icons.Material.Filled.Logout"
+                   Href="/taxbaik/admin/logout">
+            로그아웃
+        </MudButton>
     </MudAppBar>
 
-    <MudDrawer @bind-open="@drawerOpen" Elevation="1" Variant="DrawerVariant.Responsive" Breakpoint="Breakpoint.Md">
-        <MudNavMenu>
-            <MudNavLink Href="/taxbaik/admin/dashboard" Match="NavLinkMatch.All">📊 대시보드</MudNavLink>
-            <MudNavLink Href="/taxbaik/admin/blog">📝 블로그 관리</MudNavLink>
-            <MudNavLink Href="/taxbaik/admin/inquiries">💬 문의 관리</MudNavLink>
-            <MudNavLink Href="/taxbaik/admin/settings">⚙️ 설정</MudNavLink>
+    <MudDrawer @bind-open="@drawerOpen"
+               Elevation="0"
+               Variant="DrawerVariant.Responsive"
+               Breakpoint="Breakpoint.Md"
+               Class="admin-drawer">
+        <div class="admin-drawer-brand">
+            <div class="admin-brand-mark">T</div>
+            <div>
+                <MudText Typo="Typo.subtitle1">TaxBaik</MudText>
+                <MudText Typo="Typo.caption">세무 운영 콘솔</MudText>
+            </div>
+        </div>
+        <MudNavMenu Class="admin-nav">
+            <MudNavLink Href="/taxbaik/admin/dashboard" Match="NavLinkMatch.All" Icon="@Icons.Material.Filled.Dashboard">대시보드</MudNavLink>
+            <MudNavLink Href="/taxbaik/admin/announcements" Icon="@Icons.Material.Filled.Campaign">공지사항</MudNavLink>
+            <MudNavLink Href="/taxbaik/admin/blog" Icon="@Icons.Material.Filled.Article">블로그 관리</MudNavLink>
+            <MudNavLink Href="/taxbaik/admin/inquiries" Icon="@Icons.Material.Filled.Forum">문의 관리</MudNavLink>
+            <MudNavLink Href="/taxbaik/admin/settings" Icon="@Icons.Material.Filled.Tune">설정</MudNavLink>
         </MudNavMenu>
+        <div class="admin-drawer-footer">
+            <MudText Typo="Typo.caption">운영 기준</MudText>
+            <MudText Typo="Typo.body2">변경 사항은 배포 후 Playwright로 검증합니다.</MudText>
+        </div>
     </MudDrawer>
 
-    <MudMainContent>
-        <MudContainer MaxWidth="MaxWidth.Large" Class="my-4 px-3 px-md-0">
+    <MudMainContent Class="admin-main">
+        <MudContainer MaxWidth="MaxWidth.False" Class="admin-content">
             @Body
         </MudContainer>
     </MudMainContent>
@@ -26,4 +62,9 @@
 
 @code {
     private bool drawerOpen = true;
+
+    private void ToggleDrawer()
+    {
+        drawerOpen = !drawerOpen;
+    }
 }

TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementEdit.razor

@@ -0,0 +1,161 @@
+@page "/admin/announcements/create"
+@page "/admin/announcements/{Id:int}/edit"
+@attribute [Authorize]
+@using TaxBaik.Application.DTOs
+@using TaxBaik.Application.Services
+@inject AnnouncementService AnnouncementService
+@inject NavigationManager Navigation
+@inject ISnackbar Snackbar
+
+<PageTitle>@(Id.HasValue ? "공지 수정" : "공지 등록")</PageTitle>
+
+<section class="admin-page-hero">
+    <div>
+        <MudText Typo="Typo.caption" Class="admin-eyebrow">Homepage</MudText>
+        <MudText Typo="Typo.h4" Class="admin-page-title">@(Id.HasValue ? "공지 수정" : "공지 등록")</MudText>
+    </div>
+</section>
+
+<MudPaper Class="admin-surface" Elevation="0">
+    <MudForm @ref="form">
+        <MudGrid>
+            <MudItem xs="12">
+                <MudTextField @bind-Value="model.Title"
+                              Label="제목"
+                              Variant="Variant.Outlined"
+                              Required="true"
+                              RequiredError="제목을 입력하세요."
+                              HelperText="홈페이지 상단 공지 바에 표시되는 텍스트입니다." />
+            </MudItem>
+
+            <MudItem xs="12">
+                <MudTextField @bind-Value="model.Content"
+                              Label="상세 내용 (선택)"
+                              Variant="Variant.Outlined"
+                              Lines="3"
+                              HelperText="부가 설명이 있을 경우 입력합니다. 없으면 제목만 표시됩니다." />
+            </MudItem>
+
+            <MudItem xs="12" sm="6">
+                <MudSelect @bind-Value="model.DisplayType"
+                           Label="유형"
+                           Variant="Variant.Outlined">
+                    <MudSelectItem Value="@("info")">일반 (파란색)</MudSelectItem>
+                    <MudSelectItem Value="@("banner")">배너 (주황색) — 중요 이벤트</MudSelectItem>
+                    <MudSelectItem Value="@("urgent")">긴급 (빨간색) — 마감 임박</MudSelectItem>
+                </MudSelect>
+            </MudItem>
+
+            <MudItem xs="12" sm="6">
+                <MudNumericField @bind-Value="model.SortOrder"
+                                 Label="노출 순서"
+                                 Variant="Variant.Outlined"
+                                 HelperText="숫자가 클수록 먼저 표시됩니다." />
+            </MudItem>
+
+            <MudItem xs="12" sm="6">
+                <MudDatePicker @bind-Date="startsAtDate"
+                               Label="게시 시작일 (비우면 즉시)"
+                               Variant="Variant.Outlined"
+                               DateFormat="yyyy-MM-dd"
+                               Clearable="true" />
+            </MudItem>
+
+            <MudItem xs="12" sm="6">
+                <MudDatePicker @bind-Date="endsAtDate"
+                               Label="게시 종료일 (비우면 무기한)"
+                               Variant="Variant.Outlined"
+                               DateFormat="yyyy-MM-dd"
+                               Clearable="true" />
+            </MudItem>
+
+            <MudItem xs="12">
+                <MudSwitch @bind-Checked="model.IsActive"
+                           Label="@(model.IsActive ? "활성화 (홈페이지에 노출)" : "비활성화 (홈페이지 미노출)")"
+                           Color="Color.Primary" />
+            </MudItem>
+        </MudGrid>
+
+        <div class="d-flex gap-2 mt-4">
+            <MudButton Variant="Variant.Filled" Color="Color.Primary"
+                       StartIcon="@Icons.Material.Filled.Save"
+                       Disabled="isSaving"
+                       @onclick="SaveAsync">
+                @(isSaving ? "저장 중..." : "저장")
+            </MudButton>
+            <MudButton Variant="Variant.Outlined"
+                       @onclick="@(() => Navigation.NavigateTo("/taxbaik/admin/announcements"))">
+                취소
+            </MudButton>
+        </div>
+    </MudForm>
+</MudPaper>
+
+@code {
+    [Parameter] public int? Id { get; set; }
+
+    private MudForm? form;
+    private bool isSaving;
+    private DateTime? startsAtDate;
+    private DateTime? endsAtDate;
+
+    private AnnouncementDto model = new();
+
+    protected override async Task OnInitializedAsync()
+    {
+        if (Id.HasValue)
+        {
+            var entity = await AnnouncementService.GetByIdAsync(Id.Value);
+            if (entity is null)
+            {
+                Navigation.NavigateTo("/taxbaik/admin/announcements");
+                return;
+            }
+            model = new AnnouncementDto
+            {
+                Id          = entity.Id,
+                Title       = entity.Title,
+                Content     = entity.Content,
+                DisplayType = entity.DisplayType,
+                IsActive    = entity.IsActive,
+                SortOrder   = entity.SortOrder
+            };
+            startsAtDate = entity.StartsAt?.ToLocalTime();
+            endsAtDate   = entity.EndsAt?.ToLocalTime();
+        }
+    }
+
+    private async Task SaveAsync()
+    {
+        if (form is null) return;
+        await form.Validate();
+        if (!form.IsValid) return;
+
+        isSaving = true;
+        try
+        {
+            model.StartsAt = startsAtDate.HasValue
+                ? DateTime.SpecifyKind(startsAtDate.Value.Date, DateTimeKind.Local).ToUniversalTime()
+                : null;
+            model.EndsAt = endsAtDate.HasValue
+                ? DateTime.SpecifyKind(endsAtDate.Value.Date.AddDays(1).AddSeconds(-1), DateTimeKind.Local).ToUniversalTime()
+                : null;
+
+            if (Id.HasValue)
+                await AnnouncementService.UpdateAsync(model);
+            else
+                await AnnouncementService.CreateAsync(model);
+
+            Snackbar.Add("공지사항이 저장되었습니다.", Severity.Success);
+            Navigation.NavigateTo("/taxbaik/admin/announcements");
+        }
+        catch (Exception ex)
+        {
+            Snackbar.Add($"저장 실패: {ex.Message}", Severity.Error);
+        }
+        finally
+        {
+            isSaving = false;
+        }
+    }
+}

TaxBaik.Web/Components/Admin/Pages/Announcements/AnnouncementList.razor

@@ -0,0 +1,148 @@
+@page "/admin/announcements"
+@attribute [Authorize]
+@using TaxBaik.Application.Services
+@using TaxBaik.Domain.Entities
+@inject AnnouncementService AnnouncementService
+@inject NavigationManager Navigation
+@inject IDialogService DialogService
+@inject ISnackbar Snackbar
+
+<PageTitle>공지사항 관리</PageTitle>
+
+<section class="admin-page-hero">
+    <div>
+        <MudText Typo="Typo.caption" Class="admin-eyebrow">Homepage</MudText>
+        <MudText Typo="Typo.h4" Class="admin-page-title">공지사항 관리</MudText>
+        <MudText Typo="Typo.body2" Class="admin-page-subtitle">홈페이지 상단에 노출되는 공지사항을 등록하고 관리합니다.</MudText>
+    </div>
+    <MudButton Variant="Variant.Filled" Color="Color.Primary"
+               StartIcon="@Icons.Material.Filled.Add"
+               Href="/taxbaik/admin/announcements/create">
+        공지 등록
+    </MudButton>
+</section>
+
+<MudPaper Class="admin-surface" Elevation="0">
+    @if (announcements is null)
+    {
+        <MudProgressLinear Indeterminate="true" />
+    }
+    else if (!announcements.Any())
+    {
+        <MudText Class="pa-4 text-muted">등록된 공지사항이 없습니다.</MudText>
+    }
+    else
+    {
+        <MudSimpleTable Striped="true" Dense="true" Class="admin-table">
+            <thead>
+                <tr>
+                    <th>제목</th>
+                    <th>유형</th>
+                    <th>상태</th>
+                    <th>게시 기간</th>
+                    <th>순서</th>
+                    <th></th>
+                </tr>
+            </thead>
+            <tbody>
+                @foreach (var item in announcements)
+                {
+                    <tr>
+                        <td>@item.Title</td>
+                        <td>
+                            <MudChip Size="Size.Small" Color="@GetTypeColor(item.DisplayType)">
+                                @GetTypeLabel(item.DisplayType)
+                            </MudChip>
+                        </td>
+                        <td>
+                            @if (IsCurrentlyActive(item))
+                            {
+                                <MudChip Size="Size.Small" Color="Color.Success">노출 중</MudChip>
+                            }
+                            else if (!item.IsActive)
+                            {
+                                <MudChip Size="Size.Small" Color="Color.Default">비활성</MudChip>
+                            }
+                            else
+                            {
+                                <MudChip Size="Size.Small" Color="Color.Warning">기간 외</MudChip>
+                            }
+                        </td>
+                        <td class="small">
+                            @FormatPeriod(item)
+                        </td>
+                        <td>@item.SortOrder</td>
+                        <td>
+                            <MudButtonGroup Size="Size.Small" Variant="Variant.Outlined">
+                                <MudButton @onclick="@(() => Navigation.NavigateTo($"/taxbaik/admin/announcements/{item.Id}/edit"))">
+                                    수정
+                                </MudButton>
+                                <MudButton Color="Color.Error" @onclick="@(() => DeleteAsync(item))">
+                                    삭제
+                                </MudButton>
+                            </MudButtonGroup>
+                        </td>
+                    </tr>
+                }
+            </tbody>
+        </MudSimpleTable>
+    }
+</MudPaper>
+
+@code {
+    private List<Announcement>? announcements;
+
+    protected override async Task OnInitializedAsync()
+    {
+        await LoadAsync();
+    }
+
+    private async Task LoadAsync()
+    {
+        announcements = (await AnnouncementService.GetAllAsync()).ToList();
+    }
+
+    private async Task DeleteAsync(Announcement item)
+    {
+        var confirmed = await DialogService.ShowMessageBox(
+            "공지 삭제",
+            $"'{item.Title}' 공지를 삭제하시겠습니까?",
+            yesText: "삭제", cancelText: "취소");
+
+        if (confirmed != true) return;
+
+        await AnnouncementService.DeleteAsync(item.Id);
+        Snackbar.Add("공지사항이 삭제되었습니다.", Severity.Success);
+        await LoadAsync();
+    }
+
+    private static bool IsCurrentlyActive(Announcement a)
+    {
+        if (!a.IsActive) return false;
+        var now = DateTime.UtcNow;
+        if (a.StartsAt.HasValue && a.StartsAt > now) return false;
+        if (a.EndsAt.HasValue   && a.EndsAt   < now) return false;
+        return true;
+    }
+
+    private static string FormatPeriod(Announcement a)
+    {
+        var start = a.StartsAt?.ToLocalTime().ToString("MM/dd") ?? "즉시";
+        var end   = a.EndsAt?.ToLocalTime().ToString("MM/dd")   ?? "무기한";
+        return $"{start} ~ {end}";
+    }
+
+    private static Color GetTypeColor(string type) => type switch
+    {
+        "urgent" => Color.Error,
+        "banner" => Color.Warning,
+        _        => Color.Info
+    };
+
+    private static string GetTypeLabel(string type) => type switch
+    {
+        "urgent" => "긴급",
+        "banner" => "배너",
+        _        => "일반"
+    };
+}

TaxBaik.Web/Components/Admin/Pages/Blog/BlogList.razor

@@ -5,20 +5,24 @@
 
 <PageTitle>블로그 관리</PageTitle>
 
-<div class="mb-4 d-flex justify-content-between align-items-center">
-    <MudText Typo="Typo.h5">📝 블로그 관리</MudText>
-    <MudButton Variant="Variant.Filled" Color="Color.Primary"
-        Href="/taxbaik/admin/blog/create">새 포스트</MudButton>
-</div>
+<section class="admin-page-hero">
+    <div>
+        <MudText Typo="Typo.caption" Class="admin-eyebrow">Content</MudText>
+        <MudText Typo="Typo.h4" Class="admin-page-title">블로그 관리</MudText>
+        <MudText Typo="Typo.body2" Class="admin-page-subtitle">검색 유입 콘텐츠의 발행 상태와 성과를 관리합니다.</MudText>
+    </div>
+    <MudButton Variant="Variant.Filled" Color="Color.Primary" StartIcon="@Icons.Material.Filled.EditNote"
+        Href="/taxbaik/admin/blog/create">새 포스트 작성</MudButton>
+</section>
 
-<MudPaper Class="pa-4 mb-4" Elevation="1">
+<MudPaper Class="admin-surface mb-4" Elevation="0">
     <MudStack Row="true" AlignItems="AlignItems.Center" Justify="Justify.SpaceBetween">
         <MudText Typo="Typo.subtitle1">@($"전체 포스트 {totalPosts}개")</MudText>
         <MudText Typo="Typo.body2">페이지 @currentPage / @totalPages</MudText>
     </MudStack>
 </MudPaper>
 
-<MudDataGrid Items="@posts" Striped="true" Hoverable="true" Loading="@isLoading">
+<MudDataGrid Items="@posts" Striped="true" Hoverable="true" Loading="@isLoading" Class="admin-grid">
     <Columns>
         <PropertyColumn Property="x => x.Title" Title="제목" />
         <PropertyColumn Property="x => x.IsPublished" Title="발행">
@@ -31,9 +35,9 @@
         <PropertyColumn Property="x => x.CreatedAt" Title="작성일" Format="yyyy-MM-dd" />
         <TemplateColumn>
             <CellTemplate Context="cell">
-                <MudButton Variant="Variant.Text" Color="Color.Primary"
-                    Href="@($"/taxbaik/admin/blog/{cell.Item.Id}/edit")">수정</MudButton>
-                <MudButton Variant="Variant.Text" Color="Color.Error"
+                <MudButton Variant="Variant.Outlined" Size="Size.Small" Color="Color.Primary"
+                    Href="@($"/taxbaik/admin/blog/{cell.Item.Id}/edit")">수정하기</MudButton>
+                <MudButton Variant="Variant.Text" Size="Size.Small" Color="Color.Error"
                     @onclick="@(async () => await DeletePost(cell.Item.Id))">삭제</MudButton>
             </CellTemplate>
         </TemplateColumn>

TaxBaik.Web/Components/Admin/Pages/Dashboard.razor

@@ -5,41 +5,60 @@
 
 <PageTitle>대시보드</PageTitle>
 
-<h1 class="mb-4">대시보드</h1>
+<section class="admin-page-hero">
+    <div>
+        <MudText Typo="Typo.caption" Class="admin-eyebrow">Overview</MudText>
+        <MudText Typo="Typo.h4" Class="admin-page-title">대시보드</MudText>
+        <MudText Typo="Typo.body2" Class="admin-page-subtitle">문의 흐름과 콘텐츠 상태를 한 화면에서 확인합니다.</MudText>
+    </div>
+    <MudButton Variant="Variant.Filled" Color="Color.Primary" StartIcon="@Icons.Material.Filled.Add" Href="/taxbaik/admin/blog/create">
+        새 포스트 작성
+    </MudButton>
+</section>
 
-<MudGrid>
+<MudGrid Class="admin-metric-grid">
     <MudItem xs="12" sm="6" md="3">
-        <MudPaper Class="pa-4" Elevation="1">
-            <MudText Typo="Typo.subtitle2">이번달 문의</MudText>
-            <MudText Typo="Typo.h4">@summary.ThisMonthInquiries</MudText>
+        <MudPaper Class="admin-metric-card accent-blue" Elevation="0">
+            <MudText Typo="Typo.caption">이번달 문의</MudText>
+            <MudText Typo="Typo.h3">@summary.ThisMonthInquiries</MudText>
+            <MudText Typo="Typo.body2">월간 상담 유입</MudText>
         </MudPaper>
     </MudItem>
 
     <MudItem xs="12" sm="6" md="3">
-        <MudPaper Class="pa-4" Elevation="1">
-            <MudText Typo="Typo.subtitle2">신규 문의</MudText>
-            <MudText Typo="Typo.h4">@summary.NewInquiries</MudText>
+        <MudPaper Class="admin-metric-card accent-amber" Elevation="0">
+            <MudText Typo="Typo.caption">신규 문의</MudText>
+            <MudText Typo="Typo.h3">@summary.NewInquiries</MudText>
+            <MudText Typo="Typo.body2">처리 대기</MudText>
         </MudPaper>
     </MudItem>
 
     <MudItem xs="12" sm="6" md="3">
-        <MudPaper Class="pa-4" Elevation="1">
-            <MudText Typo="Typo.subtitle2">전체 포스트</MudText>
-            <MudText Typo="Typo.h4">@summary.TotalPosts</MudText>
+        <MudPaper Class="admin-metric-card accent-slate" Elevation="0">
+            <MudText Typo="Typo.caption">전체 포스트</MudText>
+            <MudText Typo="Typo.h3">@summary.TotalPosts</MudText>
+            <MudText Typo="Typo.body2">콘텐츠 자산</MudText>
         </MudPaper>
     </MudItem>
 
     <MudItem xs="12" sm="6" md="3">
-        <MudPaper Class="pa-4" Elevation="1">
-            <MudText Typo="Typo.subtitle2">발행된 포스트</MudText>
-            <MudText Typo="Typo.h4">@summary.PublishedPosts</MudText>
+        <MudPaper Class="admin-metric-card accent-green" Elevation="0">
+            <MudText Typo="Typo.caption">발행된 포스트</MudText>
+            <MudText Typo="Typo.h3">@summary.PublishedPosts</MudText>
+            <MudText Typo="Typo.body2">검색 노출 대상</MudText>
         </MudPaper>
     </MudItem>
 </MudGrid>
 
-<MudPaper Class="pa-4 mt-4" Elevation="1">
-    <MudText Typo="Typo.h6" Class="mb-3">최근 문의</MudText>
-    <MudSimpleTable Striped="true" Dense="true">
+<MudPaper Class="admin-surface mt-4" Elevation="0">
+    <div class="admin-section-header">
+        <div>
+            <MudText Typo="Typo.h6">최근 문의</MudText>
+            <MudText Typo="Typo.body2">최근 유입된 상담 요청을 빠르게 확인합니다.</MudText>
+        </div>
+        <MudButton Variant="Variant.Outlined" Color="Color.Primary" Href="/taxbaik/admin/inquiries">문의 전체 보기</MudButton>
+    </div>
+    <MudSimpleTable Striped="true" Dense="true" Class="admin-table">
         <thead>
             <tr>
                 <th>이름</th>
@@ -59,7 +78,7 @@
                     <td>
                         <MudChip Size="Size.Small"
                             Color="@(inquiry.Status == "new" ? Color.Warning : inquiry.Status == "contacted" ? Color.Info : Color.Success)">
-                            @inquiry.Status
+                            @GetStatusLabel(inquiry.Status)
                         </MudChip>
                     </td>
                     <td>@inquiry.CreatedAt.ToString("yyyy-MM-dd")</td>
@@ -75,5 +94,13 @@
     protected override async Task OnInitializedAsync()
     {
         summary = await DashboardService.GetSummaryAsync();
-    }
+}
+
+    private static string GetStatusLabel(string status) => status switch
+    {
+        "new" => "신규",
+        "contacted" => "연락함",
+        "completed" => "완료",
+        _ => status
+    };
 }

TaxBaik.Web/Components/Admin/Pages/Inquiries/InquiryList.razor

@@ -5,9 +5,16 @@
 
 <PageTitle>문의 관리</PageTitle>
 
-<MudText Typo="Typo.h5" Class="mb-4">💬 문의 관리</MudText>
+<section class="admin-page-hero">
+    <div>
+        <MudText Typo="Typo.caption" Class="admin-eyebrow">Customer Requests</MudText>
+        <MudText Typo="Typo.h4" Class="admin-page-title">문의 관리</MudText>
+        <MudText Typo="Typo.body2" Class="admin-page-subtitle">상담 요청을 상태별로 확인하고 후속 조치를 기록합니다.</MudText>
+    </div>
+</section>
 
-<MudTabs>
+<MudPaper Class="admin-surface" Elevation="0">
+<MudTabs Rounded="true" Elevation="0" Class="admin-tabs">
     <MudTabPanel Text="전체">
         <InquiryTable Status="" />
     </MudTabPanel>
@@ -21,3 +28,4 @@
         <InquiryTable Status="completed" />
     </MudTabPanel>
 </MudTabs>
+</MudPaper>

TaxBaik.Web/Components/Admin/Pages/Login.razor

@@ -5,6 +5,7 @@
 @inject IApiClient ApiClient
 @inject NavigationManager NavigationManager
 @inject CustomAuthenticationStateProvider AuthStateProvider
+@inject IJSRuntime Js
 
 <PageTitle>로그인</PageTitle>
 
@@ -58,6 +59,12 @@
 
     private LoginModel model = new();
 
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        if (firstRender)
+            await Js.InvokeVoidAsync("taxbaikAdminSession.syncRouteClass");
+    }
+
     private async Task HandleLogin()
     {
         if (isLoading)

TaxBaik.Web/Components/Admin/Pages/Settings/SiteSettings.razor

@@ -9,9 +9,23 @@
 
 <PageTitle>설정</PageTitle>
 
-<MudText Typo="Typo.h5" Class="mb-4">⚙️ 사이트 설정</MudText>
+<section class="admin-page-hero">
+    <div>
+        <MudText Typo="Typo.caption" Class="admin-eyebrow">System</MudText>
+        <MudText Typo="Typo.h4" Class="admin-page-title">설정</MudText>
+        <MudText Typo="Typo.body2" Class="admin-page-subtitle">공개 사이트 연락처와 관리자 계정 보안을 관리합니다.</MudText>
+    </div>
+</section>
 
-<MudPaper Class="pa-4" Elevation="1">
+<MudGrid>
+    <MudItem xs="12" md="7">
+<MudPaper Class="admin-surface" Elevation="0">
+    <div class="admin-section-header compact">
+        <div>
+            <MudText Typo="Typo.h6">사이트 정보</MudText>
+            <MudText Typo="Typo.body2">홈페이지와 문의 알림에 노출되는 기본 정보입니다.</MudText>
+        </div>
+    </div>
     <MudForm>
         <MudTextField @bind-Value="phone" Label="전화번호"
             Variant="Variant.Outlined" Class="mb-4" />
@@ -26,12 +40,20 @@
             Variant="Variant.Outlined" Class="mb-4" />
 
         <MudButton Variant="Variant.Filled" Color="Color.Primary"
-            @onclick="SaveSettings">저장</MudButton>
+            StartIcon="@Icons.Material.Filled.Save"
+            @onclick="SaveSettings">사이트 정보 저장</MudButton>
     </MudForm>
 </MudPaper>
+    </MudItem>
 
-<MudPaper Class="pa-4 mt-4" Elevation="1">
-    <MudText Typo="Typo.h6" Class="mb-4">계정 관리</MudText>
+    <MudItem xs="12" md="5">
+<MudPaper Class="admin-surface admin-account-card" Elevation="0">
+    <div class="admin-section-header compact">
+        <div>
+            <MudText Typo="Typo.h6">계정 관리</MudText>
+            <MudText Typo="Typo.body2">비밀번호는 12자 이상으로 관리합니다.</MudText>
+        </div>
+    </div>
 
     <MudForm>
         <MudTextField @bind-Value="currentPassword" Label="현재 비밀번호" InputType="InputType.Password"
@@ -45,11 +67,14 @@
 
         <MudButton Variant="Variant.Filled" Color="Color.Primary"
             Disabled="@isChangingPassword"
+            StartIcon="@Icons.Material.Filled.LockReset"
             @onclick="ChangePassword">
             @(isChangingPassword ? "변경 중..." : "비밀번호 변경")
         </MudButton>
     </MudForm>
 </MudPaper>
+    </MudItem>
+</MudGrid>
 
 @code {
     private string phone = "010-4122-8268";

TaxBaik.Web/Pages/Index.cshtml

@@ -1,37 +1,107 @@
 @page
 @model TaxBaik.Web.Pages.IndexModel
 @{
-    ViewData["Title"] = "백원숙 세무회계 | 사업자·부동산·증여 세무 상담";
+    var season = Model.CurrentSeason;
+    ViewData["Title"] = season != null
+        ? $"백원숙 세무회계 | {season.Name} — 지금 상담하세요"
+        : "백원숙 세무회계 | 사업자·부동산·증여 세무 상담";
     ViewData["Description"] = "사업자 기장, 부동산 양도세·증여세, 종합소득세 전문 상담. 온라인 맞춤 상담 제공.";
 }
 
-<!-- Hero Section — 강임팩트 -->
-<section class="hero-section text-white pt-5 pb-4">
-    <div class="container">
-        <div class="row align-items-center py-4">
-            <div class="col-lg-7">
-                <span class="badge bg-primary-badge mb-3">경험 있는 세무사의 맞춤 전략</span>
-                <h1 class="mb-3">
-                    세금과 자산<br/>
-                    <span style="color: #E8E4D8;">한 번에 해결하는</span>
-                </h1>
-                <p class="fs-5 mb-4" style="line-height: 1.8; opacity: 0.95;">
-                    사업자 세무, 부동산 거래, 가족자산 관리를 위한<br/>
-                    통합 솔루션을 제공합니다.
-                </p>
-                <div class="d-flex gap-3 flex-wrap">
-                    <a href="/taxbaik/contact" class="btn btn-primary btn-lg">무료 상담 신청</a>
-                    <a href="javascript:void(0);" class="btn btn-outline-primary btn-lg" onclick="openKakao()" style="border-color: white; color: white;">
-                        💬 카카오 채널 문의
-                    </a>
-                </div>
-            </div>
-            <div class="col-lg-5 d-none d-lg-block text-center">
-                <div style="font-size: 120px; opacity: 0.15;">📋</div>
+@* ─── 공지사항 배너 (관리자 등록 공지) ─── *@
+@if (Model.ActiveAnnouncements.Count > 0)
+{
+    foreach (var notice in Model.ActiveAnnouncements)
+    {
+        <div class="announcement-bar announcement-bar--@notice.DisplayType">
+            <div class="container d-flex align-items-center gap-2 py-2">
+                <span class="announcement-icon">
+                    @if (notice.DisplayType == "urgent") { <text>🚨</text> }
+                    else if (notice.DisplayType == "banner") { <text>📢</text> }
+                    else { <text>ℹ️</text> }
+                </span>
+                <span class="announcement-text fw-semibold">@notice.Title</span>
+                @if (!string.IsNullOrEmpty(notice.Content))
+                {
+                    <span class="d-none d-md-inline text-muted small ms-2">— @notice.Content</span>
+                }
             </div>
         </div>
-    </div>
-</section>
+    }
+}
+
+@* ─── Hero Section ─── *@
+@if (season != null)
+{
+    <section class="hero-section hero-section--seasonal text-white pt-5 pb-4">
+        <div class="container">
+            <div class="row align-items-center py-4">
+                <div class="col-lg-7">
+                    <span class="badge bg-danger-badge mb-3 fs-6 px-3 py-2">
+                        @season.UrgencyBadge
+                    </span>
+                    <h1 class="mb-3" style="white-space: pre-line;">@season.HeroHeadline</h1>
+                    <p class="fs-5 mb-4" style="line-height: 1.8; opacity: 0.95;">
+                        @season.HeroSubtext
+                    </p>
+                    <div class="d-flex gap-3 flex-wrap">
+                        <a href="/taxbaik/contact" class="btn btn-warning btn-lg fw-bold">
+                            ⏰ @season.CtaText
+                        </a>
+                        <a href="javascript:void(0);" class="btn btn-outline-primary btn-lg"
+                           onclick="openKakao()" style="border-color: white; color: white;">
+                            💬 카카오 채널 문의
+                        </a>
+                    </div>
+                    @if (season.DaysUntilDeadline <= 7)
+                    {
+                        <p class="mt-3 small" style="opacity: 0.8;">
+                            마감까지 <strong>@(season.DaysUntilDeadline)일</strong> 남았습니다.
+                            지금 바로 상담 신청하세요.
+                        </p>
+                    }
+                </div>
+                <div class="col-lg-5 d-none d-lg-block text-center">
+                    <div class="seasonal-deadline-badge">
+                        <div class="deadline-label">마감</div>
+                        <div class="deadline-date">@season.Deadline.ToString("M월 d일")</div>
+                        <div class="deadline-days">D-@season.DaysUntilDeadline</div>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </section>
+}
+else
+{
+    <section class="hero-section text-white pt-5 pb-4">
+        <div class="container">
+            <div class="row align-items-center py-4">
+                <div class="col-lg-7">
+                    <span class="badge bg-primary-badge mb-3">경험 있는 세무사의 맞춤 전략</span>
+                    <h1 class="mb-3">
+                        세금과 자산<br/>
+                        <span style="color: #E8E4D8;">한 번에 해결하는</span>
+                    </h1>
+                    <p class="fs-5 mb-4" style="line-height: 1.8; opacity: 0.95;">
+                        사업자 세무, 부동산 거래, 가족자산 관리를 위한<br/>
+                        통합 솔루션을 제공합니다.
+                    </p>
+                    <div class="d-flex gap-3 flex-wrap">
+                        <a href="/taxbaik/contact" class="btn btn-primary btn-lg">무료 상담 신청</a>
+                        <a href="javascript:void(0);" class="btn btn-outline-primary btn-lg"
+                           onclick="openKakao()" style="border-color: white; color: white;">
+                            💬 카카오 채널 문의
+                        </a>
+                    </div>
+                </div>
+                <div class="col-lg-5 d-none d-lg-block text-center">
+                    <div style="font-size: 120px; opacity: 0.15;">📋</div>
+                </div>
+            </div>
+        </div>
+    </section>
+}
 
 <!-- 신뢰도 스트립 — 자격과 경험 -->
 <section class="trust-strip">
@@ -62,7 +132,7 @@
     </div>
 </section>
 
-<!-- 서비스 영역 — 전문성 강조 -->
+<!-- 서비스 영역 -->
 <section class="py-5">
     <div class="container">
         <div class="text-center mb-5">
@@ -72,66 +142,88 @@
             </p>
         </div>
 
+        @{
+            var focusService = season?.FocusService ?? "";
+            // 시즌에 따라 서비스 카드 순서 결정: 시즌 관련 카드가 맨 앞
+            var cardOrder = focusService switch
+            {
+                "real-estate-tax" => new[] { "real-estate-tax", "business-tax", "family-asset" },
+                "family-asset"    => new[] { "family-asset",    "business-tax", "real-estate-tax" },
+                _                 => new[] { "business-tax",    "real-estate-tax", "family-asset" }
+            };
+        }
+
         <div class="row g-4">
-            <!-- 사업자 세무 -->
-            <div class="col-lg-4 col-md-6">
-                <div class="card service-card h-100">
-                    <div class="service-icon">🏪</div>
-                    <div class="card-body pt-0">
-                        <h3 class="card-title">사업자 세무</h3>
-                        <ul class="list-unstyled small mb-3">
-                            <li class="mb-2">✓ 정확한 기장 및 결산</li>
-                            <li class="mb-2">✓ 세금계산서 관리</li>
-                            <li class="mb-2">✓ 경비처리 최적화</li>
-                            <li class="mb-2">✓ 절세 전략 수립</li>
-                        </ul>
-                        <p class="text-muted small">
-                            초기부터 세무 전략을 수립하면 연간 최대 수백만 원의 절세가 가능합니다.
-                        </p>
-                        <a href="/taxbaik/services#business-tax" class="btn btn-sm btn-outline-primary mt-3">자세히 보기</a>
+            @foreach (var cardKey in cardOrder)
+            {
+                var isFeatured = cardKey == focusService;
+                if (cardKey == "business-tax")
+                {
+                    <div class="col-lg-4 col-md-6">
+                        <div class="card service-card h-100 @(isFeatured ? "service-card--featured" : "")">
+                            @if (isFeatured) { <div class="service-card-badge">현재 시즌</div> }
+                            <div class="service-icon">🏪</div>
+                            <div class="card-body pt-0">
+                                <h3 class="card-title">사업자 세무</h3>
+                                <ul class="list-unstyled small mb-3">
+                                    <li class="mb-2">✓ 정확한 기장 및 결산</li>
+                                    <li class="mb-2">✓ 세금계산서 관리</li>
+                                    <li class="mb-2">✓ 경비처리 최적화</li>
+                                    <li class="mb-2">✓ 절세 전략 수립</li>
+                                </ul>
+                                <p class="text-muted small">
+                                    초기부터 세무 전략을 수립하면 연간 최대 수백만 원의 절세가 가능합니다.
+                                </p>
+                                <a href="/taxbaik/services#business-tax" class="btn btn-sm btn-outline-primary mt-3">자세히 보기</a>
+                            </div>
+                        </div>
                     </div>
-                </div>
-            </div>
-
-            <!-- 부동산 세금 -->
-            <div class="col-lg-4 col-md-6">
-                <div class="card service-card h-100">
-                    <div class="service-icon">🏠</div>
-                    <div class="card-body pt-0">
-                        <h3 class="card-title">부동산 세금</h3>
-                        <ul class="list-unstyled small mb-3">
-                            <li class="mb-2">✓ 양도세 최소화</li>
-                            <li class="mb-2">✓ 취득세 절감</li>
-                            <li class="mb-2">✓ 임대소득 관리</li>
-                            <li class="mb-2">✓ 다주택자 세무</li>
-                        </ul>
-                        <p class="text-muted small">
-                            부동산 거래 시 미리 상담하면 세금 부담을 크게 줄일 수 있습니다.
-                        </p>
-                        <a href="/taxbaik/services#real-estate-tax" class="btn btn-sm btn-outline-primary mt-3">자세히 보기</a>
+                }
+                else if (cardKey == "real-estate-tax")
+                {
+                    <div class="col-lg-4 col-md-6">
+                        <div class="card service-card h-100 @(isFeatured ? "service-card--featured" : "")">
+                            @if (isFeatured) { <div class="service-card-badge">현재 시즌</div> }
+                            <div class="service-icon">🏠</div>
+                            <div class="card-body pt-0">
+                                <h3 class="card-title">부동산 세금</h3>
+                                <ul class="list-unstyled small mb-3">
+                                    <li class="mb-2">✓ 양도세 최소화</li>
+                                    <li class="mb-2">✓ 취득세 절감</li>
+                                    <li class="mb-2">✓ 임대소득 관리</li>
+                                    <li class="mb-2">✓ 다주택자 세무</li>
+                                </ul>
+                                <p class="text-muted small">
+                                    부동산 거래 시 미리 상담하면 세금 부담을 크게 줄일 수 있습니다.
+                                </p>
+                                <a href="/taxbaik/services#real-estate-tax" class="btn btn-sm btn-outline-primary mt-3">자세히 보기</a>
+                            </div>
+                        </div>
                     </div>
-                </div>
-            </div>
-
-            <!-- 가족자산 & 증여 -->
-            <div class="col-lg-4 col-md-6">
-                <div class="card service-card h-100">
-                    <div class="service-icon">👨‍👩‍👧‍👦</div>
-                    <div class="card-body pt-0">
-                        <h3 class="card-title">가족자산 관리</h3>
-                        <ul class="list-unstyled small mb-3">
-                            <li class="mb-2">✓ 증여세 전략</li>
-                            <li class="mb-2">✓ 상속세 대비</li>
-                            <li class="mb-2">✓ 자산 이전 계획</li>
-                            <li class="mb-2">✓ 가족법인 설립</li>
-                        </ul>
-                        <p class="text-muted small">
-                            세대 이전 전에 사전 계획하면 세금 부담을 현저히 줄일 수 있습니다.
-                        </p>
-                        <a href="/taxbaik/services#family-asset" class="btn btn-sm btn-outline-primary mt-3">자세히 보기</a>
+                }
+                else
+                {
+                    <div class="col-lg-4 col-md-6">
+                        <div class="card service-card h-100 @(isFeatured ? "service-card--featured" : "")">
+                            @if (isFeatured) { <div class="service-card-badge">현재 시즌</div> }
+                            <div class="service-icon">👨‍👩‍👧‍👦</div>
+                            <div class="card-body pt-0">
+                                <h3 class="card-title">가족자산 관리</h3>
+                                <ul class="list-unstyled small mb-3">
+                                    <li class="mb-2">✓ 증여세 전략</li>
+                                    <li class="mb-2">✓ 상속세 대비</li>
+                                    <li class="mb-2">✓ 자산 이전 계획</li>
+                                    <li class="mb-2">✓ 가족법인 설립</li>
+                                </ul>
+                                <p class="text-muted small">
+                                    세대 이전 전에 사전 계획하면 세금 부담을 현저히 줄일 수 있습니다.
+                                </p>
+                                <a href="/taxbaik/services#family-asset" class="btn btn-sm btn-outline-primary mt-3">자세히 보기</a>
+                            </div>
+                        </div>
                     </div>
-                </div>
-            </div>
+                }
+            }
         </div>
     </div>
 </section>
@@ -214,17 +306,32 @@
     </div>
 </section>
 
-<!-- 최종 CTA — 강렬한 다크 배경 -->
+<!-- 최종 CTA -->
 <section class="py-5" style="background: linear-gradient(135deg, #2E5C4E 0%, #1F3A30 100%); color: white;">
     <div class="container text-center">
-        <h2 class="mb-3 fw-bold" style="font-size: 2.5rem;">세금 고민은 이제 끝!</h2>
-        <p class="fs-5 mb-5" style="opacity: 0.95; max-width: 500px; margin-left: auto; margin-right: auto;">
-            무료 상담으로 현재 상황을 진단하고<br/>
-            맞춤형 절세 전략을 받아보세요.
-        </p>
-        <div class="d-flex gap-3 justify-content-center flex-wrap">
-            <a href="/taxbaik/contact" class="btn btn-warning btn-lg">상담 신청하기</a>
-            <a href="javascript:void(0);" onclick="openKakao()" class="btn btn-light btn-lg">카카오로 문의</a>
-        </div>
+        @if (season != null)
+        {
+            <h2 class="mb-3 fw-bold" style="font-size: 2.5rem;">@season.Name 마감이 다가옵니다!</h2>
+            <p class="fs-5 mb-5" style="opacity: 0.95; max-width: 500px; margin-left: auto; margin-right: auto;">
+                마감 <strong>D-@(season.DaysUntilDeadline)일</strong> — 지금 바로 상담을 신청하세요.<br/>
+                빠른 검토로 불이익 없이 신고를 완료합니다.
+            </p>
+            <div class="d-flex gap-3 justify-content-center flex-wrap">
+                <a href="/taxbaik/contact" class="btn btn-warning btn-lg">⏰ @season.CtaText</a>
+                <a href="javascript:void(0);" onclick="openKakao()" class="btn btn-light btn-lg">카카오로 문의</a>
+            </div>
+        }
+        else
+        {
+            <h2 class="mb-3 fw-bold" style="font-size: 2.5rem;">세금 고민은 이제 끝!</h2>
+            <p class="fs-5 mb-5" style="opacity: 0.95; max-width: 500px; margin-left: auto; margin-right: auto;">
+                무료 상담으로 현재 상황을 진단하고<br/>
+                맞춤형 절세 전략을 받아보세요.
+            </p>
+            <div class="d-flex gap-3 justify-content-center flex-wrap">
+                <a href="/taxbaik/contact" class="btn btn-warning btn-lg">상담 신청하기</a>
+                <a href="javascript:void(0);" onclick="openKakao()" class="btn btn-light btn-lg">카카오로 문의</a>
+            </div>
+        }
     </div>
 </section>

TaxBaik.Web/Pages/Index.cshtml.cs

@@ -1,4 +1,5 @@
 using Microsoft.AspNetCore.Mvc.RazorPages;
+using TaxBaik.Application.Seasonal;
 using TaxBaik.Application.Services;
 using TaxBaik.Domain.Entities;
 
@@ -7,16 +8,36 @@ namespace TaxBaik.Web.Pages;
 public class IndexModel : PageModel
 {
     private readonly BlogService _blogService;
+    private readonly SeasonalMarketingService _seasonalMarketingService;
+    private readonly AnnouncementService _announcementService;
 
     public List<BlogPost> RecentPosts { get; set; } = [];
+    public CurrentSeasonDto? CurrentSeason { get; set; }
+    public List<Announcement> ActiveAnnouncements { get; set; } = [];
 
-    public IndexModel(BlogService blogService)
+    public IndexModel(
+        BlogService blogService,
+        SeasonalMarketingService seasonalMarketingService,
+        AnnouncementService announcementService)
     {
         _blogService = blogService;
+        _seasonalMarketingService = seasonalMarketingService;
+        _announcementService = announcementService;
     }
 
     public async Task OnGetAsync()
     {
+        CurrentSeason = _seasonalMarketingService.GetCurrentSeason();
+
+        try
+        {
+            ActiveAnnouncements = (await _announcementService.GetActiveAsync()).ToList();
+        }
+        catch
+        {
+            ActiveAnnouncements = [];
+        }
+
         try
         {
             var (posts, _) = await _blogService.GetPublishedPagedAsync(1, 3);

TaxBaik.Web/wwwroot/css/site.css

@@ -554,3 +554,90 @@ img {
     background-color: rgba(200, 157, 110, 0.15) !important;
     color: var(--color-primary) !important;
 }
+
+/* ===== 공지사항 배너 ===== */
+.announcement-bar {
+    border-bottom: 1px solid rgba(0,0,0,0.08);
+    font-size: 0.9rem;
+}
+.announcement-bar--info {
+    background: #E8F4FD;
+    color: #1565C0;
+}
+.announcement-bar--banner {
+    background: #FFF8E1;
+    color: #E65100;
+}
+.announcement-bar--urgent {
+    background: #FFEBEE;
+    color: #C62828;
+}
+.announcement-icon {
+    flex-shrink: 0;
+}
+.announcement-text {
+    flex: 1;
+}
+
+/* ===== 시즌 Hero ===== */
+.hero-section--seasonal {
+    background: linear-gradient(135deg, #1F3A30 0%, #2E5C4E 60%, #3D7A68 100%);
+}
+.bg-danger-badge {
+    background-color: rgba(198, 40, 40, 0.85) !important;
+    color: #fff !important;
+    letter-spacing: 0.5px;
+}
+
+/* D-Day 카운트다운 위젯 */
+.seasonal-deadline-badge {
+    display: inline-flex;
+    flex-direction: column;
+    align-items: center;
+    justify-content: center;
+    width: 220px;
+    height: 220px;
+    border-radius: 50%;
+    border: 4px solid rgba(255,255,255,0.25);
+    background: rgba(255,255,255,0.08);
+    color: white;
+    backdrop-filter: blur(4px);
+}
+.deadline-label {
+    font-size: 0.85rem;
+    opacity: 0.75;
+    letter-spacing: 2px;
+    text-transform: uppercase;
+}
+.deadline-date {
+    font-size: 1.6rem;
+    font-weight: 800;
+    line-height: 1.2;
+    margin: 0.25rem 0;
+}
+.deadline-days {
+    font-size: 2.8rem;
+    font-weight: 900;
+    color: #FFD54F;
+    line-height: 1;
+}
+
+/* ===== 서비스 카드 시즌 강조 ===== */
+.service-card--featured {
+    border: 2px solid var(--color-primary) !important;
+    position: relative;
+}
+.service-card-badge {
+    position: absolute;
+    top: -12px;
+    left: 50%;
+    transform: translateX(-50%);
+    background: var(--color-primary);
+    color: white;
+    font-size: 0.75rem;
+    font-weight: 700;
+    padding: 3px 14px;
+    border-radius: 20px;
+    white-space: nowrap;
+    letter-spacing: 0.5px;
+}

TaxBaik.Web/wwwroot/js/admin-session.js

@@ -1,4 +1,9 @@
 window.taxbaikAdminSession = {
+    syncRouteClass: function () {
+        document.documentElement.classList.toggle(
+            'admin-login-route',
+            window.location.pathname.toLowerCase().endsWith('/admin/login'));
+    },
     clearAuthToken: function () {
         try {
             localStorage.removeItem('auth_token');
@@ -7,6 +12,9 @@ window.taxbaikAdminSession = {
         }
     },
     watchReconnect: function () {
+        window.taxbaikAdminSession.syncRouteClass();
+        window.addEventListener('popstate', window.taxbaikAdminSession.syncRouteClass);
+
         const modal = document.getElementById('components-reconnect-modal');
         if (!modal) {
             return;

db/migrations/V005__CreateAnnouncements.sql

@@ -0,0 +1,14 @@
+CREATE TABLE IF NOT EXISTS announcements (
+    id          SERIAL PRIMARY KEY,
+    title       VARCHAR(200)  NOT NULL,
+    content     TEXT,
+    display_type VARCHAR(20)  NOT NULL DEFAULT 'info',
+    is_active   BOOLEAN       NOT NULL DEFAULT TRUE,
+    starts_at   TIMESTAMPTZ,
+    ends_at     TIMESTAMPTZ,
+    sort_order  INT           NOT NULL DEFAULT 0,
+    created_at  TIMESTAMPTZ   NOT NULL DEFAULT NOW(),
+    updated_at  TIMESTAMPTZ   NOT NULL DEFAULT NOW()
+);
+
+COMMENT ON COLUMN announcements.display_type IS 'banner | info | urgent';