/* ==========================================================================
   1. 기본 변수 및 글로벌 스타일 (Base Styles - PC 기준)
   ========================================================================== */
:root {
    --bg-color: #121212; 
    --text-color: #F3F4F6; 
    --sub-text-color: #A1A1AA; 
    --accent-color: #3B82F6; 
    --border-color: #2A2A2A; 
    --card-bg: #1E1E1E; 
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Pretendard Variable', Pretendard, -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden; /* 모바일 가로 스크롤 방지 */
}

/* PC 환경에서는 모바일 전용 줄바꿈 태그 숨김 */
.mobile-br {
    display: none;
}

/* ==========================================================================
   2. 네비게이션 바 (Navbar)
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(18, 18, 18, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
}

.logo {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-color);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-color);
}

/* ==========================================================================
   3. 공통 섹션 & 컴포넌트 (Common Section & Components)
   ========================================================================== */
.section {
    min-height: auto;
    padding: 80px 40px 60px;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--text-color);
    padding-bottom: 10px;
    display: inline-block;
}

p {
    font-size: clamp(0.75rem, 1.5vw, 1.5rem);
    color: var(--sub-text-color);
    margin-bottom: 30px;
}

/* 버튼 스타일 */
.btn {
    display: inline-block;
    padding: 16px 32px;
    background-color: var(--text-color);
    color: var(--bg-color);
    text-decoration: none;
    font-weight: 600;
    border-radius: 4px;
    transition: all 0.3s ease;
    border: 1px solid var(--text-color);
}

.btn:hover {
    background-color: var(--bg-color);
    color: var(--text-color);
}

.btn.outline {
    background-color: transparent;
    color: var(--text-color);
}

.btn.outline:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

/* [격리] button 태그이면서 .btn 클래스를 가진 요소 전용 리셋 구문 
   - .carousel-btn 등 다른 button 태그 및 <a> 태그에는 영향이 미치지 않습니다. */
button.btn {
    cursor: pointer;
    font-size: 1rem;
    font-family: inherit;
    line-height: 1.6;
    box-sizing: border-box;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}

button.btn:focus,
button.btn:hover {
    outline: none;
}

/* 기본 카드 & 그리드 */
.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    padding: 40px;
    margin-top: 10px;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   4. Hero 섹션
   ========================================================================== */
#hero {
    justify-content: flex-start;
    align-items: center;
    text-align: center;
    padding-top: 100px;
    min-height: auto;
}

h1 {
    line-height: 1.05;
    margin-top: 0;
    margin-bottom: 35px;
    letter-spacing: 0.02em;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
    width: 100%;
}

.hero-title-main {
    font-size: clamp(3.5rem, 8.5vw, 7.5rem);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: -0.03em;
    color: var(--text-color);
    white-space: nowrap;
    margin-top: -0.05em;
}

.hero-title-sub {
    font-size: clamp(1.5rem, 2.5vw, 2.5rem);
    font-weight: 600;
    color: var(--sub-text-color);
    letter-spacing: -0.01em;
    margin-bottom: -1px;
    line-height: 1.3;
}

.hero-banner-image-container {
    width: 100%;
    max-width: 1200px;
    margin-top: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: var(--card-bg);
    min-height: 280px;
    max-height: 380px;
}

.hero-banner-image-container img {
    width: 100%;
    height: 100%;
    max-height: 380px;
    object-fit: cover;
    display: block;
}

/* ==========================================================================
   5. Story 섹션 & Work Principles
   ========================================================================== */
.story-container {
    display: grid;
    grid-template-columns: calc(40% - 30px) calc(56% - 30px);
    gap: 60px;
    align-items: stretch;
}

.story-left-col {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.story-left-col h2 {
    margin-bottom: 30px;
}

.story-main-heading {
    font-size: clamp(1.75rem, 2.45vw, 2.4rem);
    line-height: 1.35;
    color: var(--text-color);
    margin-bottom: 20px;
    letter-spacing: -0.01em;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.story-lead-desc {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--accent-color);
    line-height: 1.7;
    margin-bottom: 10px;
}

.story-lead-desc-sub {
    font-size: 1.05rem;
    color: var(--sub-text-color);
    line-height: 1.7;
    margin-bottom: 0;
}

.story-right-col {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.story-carousel-wrapper {
    position: relative;
    width: 100%;
    padding: 0 15px;
}

.story-carousel-track-container {
    overflow: hidden;
    width: 100%;
    border-radius: 8px;
}

.story-carousel-track {
    display: flex;
    transition: transform 0.4s ease-in-out;
    width: 100%;
}

.card.story-content-card {
    flex: 0 0 100%;
    width: 100%;
    box-sizing: border-box;
    margin-top: 0;
    padding: 32px 32px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transform: none !important;
    box-shadow: none !important;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.story-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 24px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.story-card-body {
    display: flex;
    gap: 20px;
    align-items: center;
    flex: 1;
    width: 100%;
}

.story-card-img-col {
    flex: 0 0 48%;
    width: 48%;
    height: 100%;
    min-height: 220px;
    display: flex;
}

.img-placeholder {
    width: 100%;
    height: 100%;
    min-height: 100px;
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px dashed var(--border-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sub-text-color);
    font-size: 0.9rem;
    font-weight: 500;
}

.story-card-text-col {
    flex: 0 0 52%;
    width: 52%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 16px;
    padding-right: 12px;
    box-sizing: border-box;
}

.story-card-text-col p {
    font-size: 0.98rem;
    color: var(--text-color);
    line-height: 1.75;
    margin-bottom: 0;
    word-break: keep-all;
}

.story-card-text-col strong {
    font-weight: 700;
    border-bottom: 2px solid var(--accent-color);
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-100%);
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 1.8rem;
    font-weight: 300;
    cursor: pointer;
    z-index: 10;
    padding: 10px;
    transition: color 0.2s ease, opacity 0.2s ease;
    opacity: 0.6;
}

.carousel-btn:hover {
    color: var(--accent-color);
    opacity: 1;
}

.prev-btn { left: -15px; }
.next-btn { right: -15px; }

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 18px;
}

.carousel-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--border-color);
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease;
}

.carousel-dot.active {
    background-color: var(--accent-color);
    transform: scale(1.2);
}

/* Work Principles 영역 */
.principles-container {
    margin-top: 100px;
    display: grid;
    grid-template-columns: 35% 60%; 
    justify-content: space-between;
    gap: 40px;
    align-items: flex-start;
}

.principles-header {
    padding-top: 0;
    padding-left: 10px;
}

.principles-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: 12px;
    line-height: 1.2;
}

.principles-sub {
    font-size: 1.05rem;
    color: var(--text-color);
    line-height: 1.6;
    font-weight: 700;
}

.principles-sub-t {
    font-size: 1.05rem;
    color: var(--sub-text-color);
    line-height: 1.6;
    font-weight: 500;
    margin-bottom: 10px;
}

.principles-list {
    display: flex;
    flex-direction: column;
    padding-left: 10px;
}

.principle-item {
    display: grid;
    grid-template-columns: 50px 120px 1fr;
    gap: 20px;
    padding: 24px 0; 
    border-bottom: 1px solid var(--border-color);
    align-items: flex-start;
    transition: background-color 0.3s ease;
}

.principle-item:first-child {
    padding-top: 0;
}

.principle-item:hover {
    background-color: rgba(255, 255, 255, 0.02);
}

.principle-num {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--accent-color);
    padding-top: 2px;
}

.principle-name-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.principle-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.2;
}

.principle-name-en {
    font-size: 0.8rem;
    color: var(--sub-text-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.principle-desc {
    font-size: 0.98rem;
    color: var(--sub-text-color);
    line-height: 1.7;
    margin: 0;
    word-break: keep-all;
}

.principle-desc strong {
    color: var(--text-color);
}

/* ==========================================================================
   6. Expertise & Credentials 섹션
   ========================================================================== */
#expertise {
    margin-bottom: -40px;
}

.expertise-intro-container {
    position: relative; /* 모바일 절대배치 요소의 기준점 추가 */
    width: 100%;
    text-align: center;
    margin-bottom: 120px;
}

.expertise-intro-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

.expertise-intro-sub {
    font-size: 1.1rem;
    color: var(--sub-text-color);
    line-height: 1.6;
    margin-bottom: 35px;
}

.workflow-arrow-banner {
    position: relative;
    width: 100%;
    max-width: 900px;
    height: 44px;
    margin: 0 auto 25px;
    background: linear-gradient(90deg, var(--bg-color) 0%, rgba(59, 130, 246, 0.4) 50%, var(--accent-color) 100%);
    clip-path: polygon(0% 20%, calc(100% - 24px) 20%, calc(100% - 24px) 0%, 100% 50%, calc(100% - 24px) 100%, calc(100% - 24px) 80%, 0% 80%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.workflow-arrow-text {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.7);
    padding-right: 15px;
}

.workflow-timeline-wrapper {
    position: relative;
    width: 100%;
    margin: 0 auto 110px;
    padding: 10px 0;
}

.workflow-line {
    position: absolute;
    top: calc(100% - 17px);
    left: 8%;
    right: 8%;
    height: 2px;
    background-color: var(--border-color);
    z-index: 1;
}

.workflow-steps {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    z-index: 2;
    width: 100%;
}

.workflow-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
}

.workflow-label {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 16px;
    white-space: nowrap;
    word-break: keep-all;
}

.workflow-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--accent-color);
    border: 3px solid var(--bg-color);
    box-shadow: 0 0 0 2px var(--accent-color);
    box-sizing: border-box;
}

.needs-wrapper {
    width: 100%;
    margin-top: 80px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.needs-box-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    width: 100%;
    max-width: 1200px;
}

.needs-speech-bubble {
    position: relative;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px 24px;
    text-align: center;
    font-size: 1.05rem;
    color: var(--text-color);
    font-weight: 500;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.needs-speech-bubble::before {
    content: '';
    position: absolute;
    top: -8px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 14px;
    height: 14px;
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    border-left: 1px solid var(--border-color);
}

.needs-speech-bubble:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
}

.needs-speech-bubble .accent-text {
    color: var(--accent-color);
    font-weight: 700;
}

.brand-hl {
    font-weight: 700;
    padding-bottom: 2px;
}

.hl-naver { border-bottom: 2px solid #03C75A; }
.hl-google { border-bottom: 2px solid #EA4335; }
.hl-instagram { border-bottom: 2px solid #E1306C; }
.hl-youtube { border-bottom: 2px solid #FF0000; }
.hl-kakao { border-bottom: 2px solid #FEE500; }
.hl-daangn { border-bottom: 2px solid #FF6F0F; }

.expertise-grid-top {
    margin-bottom: 40px;
}

.card.expertise-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.card-icon {
    color: var(--accent-color);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
}

.card-content {
    margin-bottom: 24px;
}

.card-content h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--text-color);
}

.card-content p {
    font-size: 0.95rem;
    color: var(--sub-text-color);
    margin-bottom: 0;
    line-height: 1.6;
}

.card-skills {
    border-top: 1px solid var(--border-color);
    padding-top: 18px;
    margin-top: auto;
}

.skill-category-title {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 10px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.skill-tag {
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
}

.expertise-highlights-section {
    padding: 20px 0;
}

.highlights-section-title {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: var(--text-color);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.highlights-container {
    display: grid;
    grid-template-columns: 40% 57%;
    gap: 40px;
    align-items: center;
}

.highlights-text-col {
    display: flex;
    flex-direction: column;
}

.highlights-image-col {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.expertise-highlights-image-box {
    width: 100%;
    height: 100%;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.expertise-highlights-image-box img {
    width: 100%;
    height: auto;
    object-fit: contain;
    max-height: 320px;
}

.highlights-header-copy {
    margin-bottom: 25px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.highlights-header-copy p {
    margin-bottom: 0;
}

.highlights-main-slogan {
    font-size: clamp(1.2rem, 1.8vw, 1.5rem);
    font-weight: 700;
    color: var(--text-color);
    letter-spacing: -0.01em;
    line-height: 1.4;
}

.highlights-sub-slogan {
    font-size: clamp(0.95rem, 1.3vw, 1.1rem);
    font-weight: 500;
    color: var(--sub-text-color);
    line-height: 1.5;
}

.highlight-category {
    margin-bottom: 22px;
}

.highlight-category h4 {
    font-size: 1.05rem;
    color: var(--accent-color);
    margin-bottom: 8px;
    font-weight: 600;
}

.highlight-category p {
    font-size: 0.95rem;
    color: var(--sub-text-color);
    margin-bottom: 0;
    line-height: 1.5;
}

.history-list {
    list-style-type: disc;
    padding-left: 20px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.history-list li {
    font-size: 0.9rem;
    color: var(--sub-text-color);
    line-height: 1.4;
}

/* ==========================================================================
   7. Case Studies 섹션 및 Contact 섹션
   ========================================================================== */
.budget-summary-card {
    margin-bottom: 40px;
    padding: 60px 0 70px;
    text-align: center;
    background: transparent;
    border: none;
    border-radius: 0;
}

.budget-label {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.budget-number-wrapper {
    font-size: clamp(2rem, 4.5vw, 3.2rem);
    font-weight: 800;
    color: var(--text-color);
    letter-spacing: -0.02em;
    margin-bottom: 8px;
    display: flex;
    justify-content: center;
    align-items: baseline;
    gap: 4px;
}

.budget-unit {
    font-size: clamp(1.2rem, 2.2vw, 1.8rem);
    font-weight: 700;
    color: var(--text-color);
}

.budget-summary-card .budget-desc {
    font-size: 0.95rem;
    color: var(--sub-text-color);
    margin-bottom: 0;
}

.case-studies-subcopy-chevron {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-color);
    line-height: 1.6;
    margin-top: -55px;
    margin-bottom: 20px;
    text-align: center;
    word-break: keep-all;
}

.case-studies-subcopy {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--sub-text-color);
    line-height: 1.6;
    margin-bottom: 28px;
    text-align: center;
    word-break: keep-all;
}

.case-studies-headcopy {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.6;
    margin-top: 0;
    margin-bottom: 40px;
    text-align: center;
    word-break: keep-all;
}

.case-studies-headcopy span {
    border-bottom: 2px solid var(--accent-color);
}

.case-studies-list {
    display: flex;
    flex-direction: column;
    gap: 32px;
    width: 100%;
}

.case-card {
    display: grid;
    grid-template-columns: 62% 38%;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 36px 40px;
    gap: 32px;
    align-items: center;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    border-color: rgba(59, 130, 246, 0.4);
}

.case-info-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.case-category {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent-color);
}

.case-title {
    font-size: 1.45rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 4px;
    line-height: 1.3;
}

.case-meta-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding: 10px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.meta-item {
    font-size: 0.88rem;
    display: flex;
    gap: 8px;
}

.meta-label {
    color: var(--sub-text-color);
}

.meta-value {
    color: var(--text-color);
    font-weight: 600;
}

.case-mission {
    font-size: 0.92rem;
    color: var(--sub-text-color);
    line-height: 1.6;
    margin-bottom: 8px;
    word-break: keep-all;
}

.case-mission strong {
    color: var(--text-color);
}

.case-media-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 4px;
}

.media-badge {
    font-size: 0.78rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 4px;
    background-color: var(--bg-color);
    box-sizing: border-box;
}

.media-naver { border: 1px solid #03C75A; color: #03C75A; }
.media-google { border: 1px solid #EA4335; color: #EA4335; }
.media-instagram { border: 1px solid #E1306C; color: #E1306C; }
.media-youtube { border: 1px solid #FF0000; color: #FF0000; }
.media-kakao { border: 1px solid #FEE500; color: #FEE500; }
.media-x { border: 1px solid #FFFFFF; color: #FFFFFF; }
.media-daangn { border: 1px solid #FF6F0F; color: #FF6F0F; }
.media-tiktok { border: 1px solid #25F4EE; color: #25F4EE; }
.media-toss { border: 1px solid #3182F6; color: #3182F6; }

.case-graphic-col {
    display: flex;
    justify-content: flex-start;
    align-self: stretch;
    height: auto;
}

.graphic-box {
    width: 85%;
    margin-right: auto;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.graphic-label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-color); 
}

.graphic-number-huge {
    font-size: clamp(2.2rem, 3.5vw, 3rem);
    font-weight: 800;
    color: var(--accent-color);
    line-height: 1;
    letter-spacing: -0.02em;
}

.graphic-unit {
    font-size: 1.2rem;
    font-weight: 700;
    margin-left: 2px;
}

.roas-graph-container {
    width: 100%;
    margin-top: 10px;
    position: relative;
    padding-bottom: 20px; 
}

.roas-track {
    width: 100%;
    height: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    position: relative;
}

.roas-fill {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    background: linear-gradient(90deg, var(--text-color) 0%, var(--text-color) 7.33%, #3B82F6 20%, var(--accent-color) 100%);
    border-radius: 4px;
    clip-path: inset(0 100% 0 0);
    transition: clip-path 2s cubic-bezier(0.22, 1, 0.36, 1);
}

.roas-fill.animate {
    clip-path: inset(0 0 0 0);
}

.roas-threshold-line {
    position: absolute;
    left: 7.33%;
    top: -4px;
    bottom: -4px;
    width: 2px;
    background-color: var(--text-color);
    z-index: 2;
}

.roas-hundred-text {
    position: absolute;
    left: 7.33%;
    top: 14px;
    transform: translateX(-50%);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-color);
}

.kpi-bars-container {
    width: 100%;
    margin-top: 15px;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 16px;
    padding-bottom: 22px;
}

.kpi-bar-row {
    display: flex;
    align-items: flex-end;
    gap: 10px;
    width: 100%;
}

.kpi-label {
    width: 60px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-color);
    text-align: left;
    flex-shrink: 0;
    margin-bottom: -2px;
}

.kpi-track-wrap {
    flex: 1;
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.kpi-percent-text {
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1;
    text-align: right;
}

.kpi-track {
    width: 100%;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.kpi-fill {
    height: 100%;
    width: 0;
    border-radius: 3px;
    transition: width 1.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.kpi-threshold-overlay {
    position: absolute;
    top: 14px;
    bottom: 22px; 
    left: calc(70px + (100% - 70px) * 0.4761);
    width: 1px;
    pointer-events: none;
}

.kpi-threshold-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    border-left: 1px dashed var(--text-color);
}

.kpi-threshold-text {
    position: absolute;
    bottom: -18px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-color);
}

.growth-badge-pill {
    margin-top: 10px;
    background-color: rgba(59, 130, 246, 0.15);
    color: var(--text-color);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: 16px;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.case-studies-notice {
    margin-top: -1px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.notice-line {
    font-size: 0.92rem;
    color: var(--sub-text-color);
    margin-bottom: 0;
    line-height: 1.5;
    word-break: keep-all;
}

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   8. 플로팅 문의 버튼 (Floating Contact Button - PC 기본)
   ========================================================================== */

   /* 전체 컨테이너 래퍼 (버튼 기준 중앙 정렬) */
.floating-btn-wrap {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center; /* 텍스트를 버튼 중앙 상단에 배치 */
    gap: 10px;
    text-decoration: none;
    transition: opacity 0.4s ease, transform 0.4s ease, visibility 0.4s ease;
}

/* Contact 섹션 진입 시 적용되는 숨김 스타일 */
.floating-btn-wrap.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(20px);
}

/* 상단 프로모션 말풍선 */
.floating-promo {
    position: relative;
    font-size: 0.65rem;
    font-weight: 700;
    color: #ffffff;
    text-align: center;
    white-space: nowrap;
    padding: 6px 12px;
    border-radius: 50px;
    background: rgba(30, 30, 30, 0.85);
    border: 1px solid rgba(59, 130, 246, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(8px);
    margin-bottom: -5px;
    /* 버튼과 조화를 이루는 푸른 빛 글로우 효과 */
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35), 0 0 12px rgba(59, 130, 246, 0.4);
    user-select: none;
    transition: transform 0.3s ease;
}

/* 말풍선 하단 꼬리 삼각 도형
.floating-promo::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 6px solid rgba(59, 130, 246, 0.8);
} */

/* 기존 플로팅 버튼 (알약 모양 유지) */
.floating-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 700;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--accent-color);
    animation: floatingColorShift 4s infinite alternate ease-in-out;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* 호버 시 인터랙션 */
.floating-btn-wrap:hover .floating-btn {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 12px 28px rgba(59, 130, 246, 0.4);
}

.floating-btn-wrap:hover .floating-promo {
    transform: translateY(-2px);
}

/* 플로팅 버튼 배경 무한 교차 애니메이션 */
@keyframes floatingColorShift {
    0% {
        background-color: rgba(30, 30, 30, 0.85);
        border-color: rgba(59, 130, 246, 0.6);
        color: var(--text-color);
        box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
    }
    100% {
        background-color: var(--accent-color);
        border-color: #60A5FA;
        color: #ffffff;
        box-shadow: 0 8px 24px rgba(59, 130, 246, 0.45);
    }
}

/* ==========================================================================
   9. 반응형 미디어 쿼리 (Media Queries - 파일 최하단 배치)
   ========================================================================== */

/* --------------------------------------------------------------------------
   9-1. 태블릿 대형 및 소형 랩톱 (Max-width: 1024px)
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .story-container,
    .highlights-container {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .card.story-content-card {
        padding: 24px 20px;
    }

    .story-card-body {
        flex-direction: column;
        gap: 14px;
    }

    .story-card-title {
        font-size: 1.1rem;
        text-align: center;
    }

    .story-slide:nth-child(6) .story-card-title {
        font-size: 0;
    }

    .story-slide:nth-child(6) .story-card-title::after {
        content: "'대기업 대행사'를 뛰쳐나온 이유";
        font-size: 1.1rem;
        display: block;
    }

    .story-card-img-col {
        width: 100%;
        flex: 0 0 auto;
        height: 140px;
        min-height: 140px;
    }

    .story-card-text-col {
        width: 100%;
        flex: 0 0 auto;
        padding-right: 0;
        text-align: center;
        align-items: center;
        margin-top: 10px;
        margin-bottom: -13px;
        gap: 10px;
    }

    .story-card-text-col p {
        text-align: center;
        line-height: 1.5;
        margin-bottom: 0;
    }

    .carousel-btn {
        font-size: 1.5rem;
    }
    
    .prev-btn { left: -10px; }
    .next-btn { right: -10px; }
}

/* --------------------------------------------------------------------------
   9-2. 중형 태블릿 (Max-width: 900px)
   -------------------------------------------------------------------------- */
@media (max-width: 900px) {
    .case-card {
        grid-template-columns: 1fr;
        gap: 24px;
        padding: 28px 20px;
    }

    .case-graphic-col {
        width: 100%;
    }

    .graphic-box {
        width: 100%;
        margin: 0 auto;
    }

    .case-meta-grid {
        gap: 12px;
        flex-direction: column;
    }
}

/* --------------------------------------------------------------------------
   9-3. 모바일 통합 최적화 (Max-width: 768px)
   ---------------------------------s----------------------------------------- */
@media (max-width: 768px) {
    .fade-in {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
    
    .mobile-br {
        display: inline;
    }

    .section {
        padding: 60px 20px 40px;
    }

    .navbar {
        padding: 15px 20px;
        flex-direction: column;
        gap: 12px;
    }

    .nav-links {
        width: 100%;
        overflow-x: auto;
        justify-content: center;
        gap: 20px;
        padding-bottom: 5px;
        white-space: nowrap;
    }

    .nav-links::-webkit-scrollbar {
        display: none;
    }

    #hero {
        padding-top: 140px;
    }

    .hero-title-main {
        white-space: normal;
        display: block;
        font-size: clamp(2.6rem, 15vw, 4.5rem); 
        line-height: 1.15;
    }

    .hero-title-sub {
        font-size: clamp(1.0rem, 3.0vw, 1.5rem);
        line-height: 1.7;
        margin-bottom: -10px;
    }

    .story-container {
        display: flex;
        flex-direction: column;
        gap: 24px;
        width: 100%;
    }

    .story-carousel-wrapper {
        padding: 0;
    }

    .principles-container {
        display: flex;
        flex-direction: column;
        gap: 20px;
        margin-top: 80px;
    }

    .principles-header {
        border-bottom: none;
        padding-bottom: 0;
    }

    .principles-sub br {
        display: none;
    }

    .principle-item {
        display: flex;
        flex-direction: column;
        gap: 12px;
        padding: 20px 0;
    }

    .principle-item:first-child {
        padding-top: 10px;
    }

    .principle-name-group {
        display: flex;
        flex-direction: row;
        align-items: baseline;
        gap: 8px;
    }

    .principle-name {
        font-size: 1.4rem;
    }

    .principle-name-en {
        margin-top: 0;
    }

    .expertise-intro-container {
        margin-bottom: 80px;
    }

    .expertise-intro-title {
        font-size: 1.8rem;
    }

    .expertise-intro-sub {
        font-size: 0.95rem;
    }

    .workflow-timeline-wrapper {
        margin-bottom: 70px;
        padding-right: 35px;
        padding-left: 20px;
    }

    .workflow-arrow-banner {
        height: 50px;
        transform: rotate(90deg);
        transform-origin: center center;
        position: absolute;
        right: -30px;
        top: 26.5%;
        width: 225px;
    }

    .workflow-arrow-text {
        font-size: 0.8rem;
    }

    .workflow-line {
        top: 0;
        bottom: 0;
        left: 36px;
        width: 2px;
        height: 100%;
        transform: translateX(-50%);
    }

    .workflow-steps {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
        padding-left: 10px;
    }

    .workflow-step {
        flex-direction: row-reverse;
        justify-content: flex-end;
        align-items: center;
        gap: 15px;
    }

    .workflow-label {
        margin-bottom: 0;
        font-size: 0.9rem;
    }

    .workflow-dot {
        margin-left: 0;
    }

    .needs-box-list {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .needs-speech-bubble {
        font-size: 0.98rem;
        padding: 16px 18px;
    }

    #contact p {
        font-size: 0.92rem;
        line-height: 1.6;
    }

    .floating-btn-wrap {
        bottom: 16px;
        right: 16px;
        gap: 8px;
    }

    .floating-promo {
        font-size: 0.6rem;
        padding: 4px 9px;
        line-height: 1.3;
        letter-spacing: -0.4px;
    }

    .floating-btn {
        padding: 8px 20px;
        font-size: 0.78rem;
    }

    /* 모바일 토스트 알림 1줄 정렬 최적화 */
    .toast-alert {
        top: 20px;
        padding: 10px 18px;
        font-size: 0.8rem;
        white-space: nowrap;
        max-width: calc(100vw - 32px);
        width: max-content;
    }
}

/* --------------------------------------------------------------------------
   9-4. 초소형 모바일 화면 (Max-width: 480px)
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
    .contact-links {
        display: flex;
        flex-direction: column;
        gap: 12px;
        width: 100%;
    }

    .contact-links .btn {
        width: 100%;
        text-align: center;
    }

    .budget-summary-card {
        padding: 40px 0 50px;
    }
}

/* ==========================================================================
   10. 토스트 알림 말풍선 (Toast Alert)
   ========================================================================== */
.toast-alert {
    position: fixed;
    top: 30px;
    left: 50%;
    transform: translate(-50%, -20px);
    background-color: rgba(30, 30, 30, 0.95);
    color: var(--text-color);
    padding: 12px 24px;
    border-radius: 30px;
    border: 1px solid var(--accent-color);
    font-size: 0.9rem;
    font-weight: 600;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease, transform 0.4s ease;
    pointer-events: none;
}

/* 알림 노출 상태 */
.toast-alert.show {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

/* ==========================================================================
   11. 푸터 영역 (Footer)
   ========================================================================== */
.footer {
    width: 100%;
    padding: 40px 20px;
    background-color: var(--card-bg);
    text-align: center;
    border-top: 1px solid var(--border-color);
    margin-top: 40px;
}

.footer p {
    font-size: 0.85rem;
    color: var(--sub-text-color);
    margin-bottom: 0;
}