:root {
    --drt-accent: #234177; /* Signature Deep Blue */
    --drt-bright: #3b82f6; /* Vivid Blue */
    --drt-text-main: #1a1c21;
    --drt-text-dim: #4b5563;
    --drt-bg: #ffffff;
    --drt-card-bg: #f8fafc;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', 'Noto Sans KR', sans-serif;
    background-color: var(--drt-bg);
    color: var(--drt-text-main);
}

.section-container {
    max-width: 1400px;
    width: 90%;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}

.record-image-cluster {
    position: relative;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding-bottom: 50px;
}

.record-img-main {
    width: 75%;
    z-index: 2;
    border-radius: 8px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.15);
    border: 4px solid #fff;
}

.record-img-sub {
    width: 50%;
    position: absolute;
    bottom: 0;
    right: 0;
    z-index: 3;
    border-radius: 8px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    border: 4px solid #fff;
    transform: rotate(3deg);
}

/* --- NEW: Proven Track Record Section --- */
#proven-track-record {
    padding: 180px 0;
    background-color: #f7f9fc;
    position: relative;
}

.record-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
}

.record-image-frame {
    position: relative;
    padding: 20px;
    background: #fff;
    border-radius: 4px;
    box-shadow: 0 40px 100px rgba(35, 65, 119, 0.1);
    transform: rotate(-2deg);
    border: 1px dashed #cbd5e1; /* 실제 사진 교체 안내를 위한 대시보드 */
}

.record-image-frame::before {
    content: '실제 기체 비행 사진으로 교체 권장';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(35, 65, 119, 0.8);
    color: #fff;
    padding: 8px 16px;
    font-size: 0.9rem;
    border-radius: 4px;
    z-index: 11;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.record-image-frame:hover::before {
    opacity: 1;
}

.record-image-frame img {
    width: 100%;
    display: block;
    border-radius: 2px;
}

.record-badge {
    position: absolute;
    top: -30px;
    right: -30px;
    background: var(--drt-accent);
    color: #fff;
    padding: 25px;
    border-radius: 50%;
    font-weight: 900;
    font-size: 1.1rem;
    text-align: center;
    line-height: 1.2;
    box-shadow: 0 20px 40px rgba(35, 65, 119, 0.3);
    z-index: 10;
}

.record-title {
    font-size: 4.5rem;
    font-weight: 950;
    color: var(--drt-accent);
    margin-bottom: 50px;
    letter-spacing: -0.02em;
}

.record-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 50px;
}

.stat-box {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    border-bottom: 4px solid var(--drt-bright);
}

.stat-box h5 {
    font-size: 1.45rem; /* 1.3rem -> 1.4rem 상향 */
    color: var(--drt-text-dim);
    margin: 0 0 15px 0;
    font-weight: 800;
    letter-spacing: 0.05em;
}

.stat-box p {
    font-size: 2.5rem; /* 2.22rem -> 2.5rem 대폭 상향 */
    font-weight: 950;
    color: var(--drt-accent);
    margin: 0;
    word-break: keep-all;
    line-height: 1.2;
}

    :root {
--consult-bg: #f8fafc;     /* White Gray (Cool Slate 50) for eye comfort */
--consult-accent: #234177; /* Brand Deep Blue */
--consult-bright: #3b82f6; /* Vivid Blue */
--consult-text: #1e293b;   /* Slate 800 */
--consult-sub: #64748b;    /* Slate 500 */
--consult-border: #cbd5e1; /* Slightly darker border for contrast */
    }

    #drt-consultation-section {
background: #f8fafc; /* White Gray (Solid) */
padding: 50px 20px; /* Reduced vertical size */
font-family: 'Inter', 'Noto Sans KR', sans-serif;
color: var(--consult-text);
position: relative;
overflow: hidden;
display: flex;
justify-content: center;
align-items: center;
border: none; /* Removed border for seamless blend */
    }

    /* PREMIUM GRID PATTERN (Subtle Tech Feel) */
    #drt-consultation-section::after {
content: '';
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
background-image:
    linear-gradient(rgba(35, 65, 119, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(35, 65, 119, 0.03) 1px, transparent 1px);
background-size: 40px 40px;
opacity: 0.6;
pointer-events: none;
z-index: 1;
    }

    .consult-container {
max-width: 1200px;
width: 100%;
display: flex;
justify-content: space-between;
align-items: center;
position: relative;
z-index: 5;
background: rgba(255, 255, 255, 0.9);
padding: 60px 70px;
border-radius: 4px; /* Slightly sharper for tech feel */
border: 1px solid rgba(255, 255, 255, 0.4);
backdrop-filter: blur(20px);
/* Premium Diffuse Shadow */
box-shadow:
    0 20px 40px -10px rgba(35, 65, 119, 0.1),
    0 0 20px rgba(255, 255, 255, 0.8) inset;
transition: transform 0.3s ease, box-shadow 0.3s ease;
    }

    /* TECH CORNER BRACKETS (New Design Element) */
    .consult-container::before,
    .consult-container::after {
content: '';
position: absolute;
width: 20px;
height: 20px;
border: 2px solid var(--consult-accent);
transition: all 0.3s ease;
opacity: 0.6;
    }

    /* Top-Left Bracket */
    .consult-container::before {
top: -1px;
left: -1px;
border-right: none;
border-bottom: none;
    }

    /* Bottom-Right Bracket */
    .consult-container::after {
bottom: -1px;
right: -1px;
border-left: none;
border-top: none;
    }

    /* Hover Effect: Brackets Expand */
    .consult-container:hover::before {
width: 30px;
height: 30px;
opacity: 1;
    }
    .consult-container:hover::after {
width: 30px;
height: 30px;
opacity: 1;
    }

    /* Hover Lift Effect for Container */
    .consult-container:hover {
transform: translateY(-2px);
box-shadow:
    0 30px 60px -12px rgba(35, 65, 119, 0.15),
    0 0 20px rgba(255, 255, 255, 0.8) inset;
    }

    /* Content Styling */
    .consult-text {
max-width: 600px;
    }

    .consult-label {
color: var(--consult-bright);
font-size: 0.85rem;
font-weight: 800;
letter-spacing: 0.15em;
text-transform: uppercase;
margin-bottom: 15px;
display: flex;
align-items: center;
gap: 10px;
    }

    /* Pulsing Dot Indicator */
    .consult-label::before {
content: '';
width: 6px;
height: 6px;
background-color: var(--consult-bright);
border-radius: 50%;
box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
animation: consult-pulse 2s infinite ease-in-out;
    }

    @keyframes consult-pulse {
0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(59, 130, 246, 0); }
100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
    }

    .consult-title {
font-size: 2.4rem;
font-weight: 800;
line-height: 1.25;
margin-bottom: 15px;
color: var(--consult-text);
letter-spacing: -0.02em;
word-break: keep-all; /* Prevent awkward word breaking (Korean) */
    }

    .consult-desc {
font-size: 1.15rem;
color: var(--consult-sub);
line-height: 1.6;
font-weight: 500;
word-break: keep-all; /* Prevent awkward word breaking (Korean) */
    }

    /* Button Area */
    .consult-action {
flex-shrink: 0;
    }

    .consult-btn {
position: relative;
display: inline-flex;
align-items: center;
justify-content: center;
padding: 22px 55px;
font-size: 1.1rem;
font-weight: 700;
color: #ffffff !important; /* Force White Text */
text-decoration: none;
/* Gradient Background */
background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
border-radius: 12px;
transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
overflow: hidden;
box-shadow: 0 10px 20px -5px rgba(30, 41, 59, 0.3);
z-index: 10;
white-space: nowrap; /* Keep button text on one line */
    }

    /* Shimmer Effect on Button */
    .consult-btn::before {
content: '';
position: absolute;
top: 0;
left: -100%;
width: 200%;
height: 100%;
background: linear-gradient(
    115deg,
    transparent 0%,
    transparent 40%,
    rgba(255, 255, 255, 0.1) 45%,
    rgba(255, 255, 255, 0.2) 50%,
    rgba(255, 255, 255, 0.1) 55%,
    transparent 60%,
    transparent 100%
);
transition: transform 0.6s ease;
transform: translateX(0);
z-index: 1;
    }

    .consult-btn:hover {
transform: translateY(-3px);
box-shadow: 0 20px 30px -10px rgba(30, 41, 59, 0.5);
background: linear-gradient(135deg, #334155 0%, #1e293b 100%);
    }

    .consult-btn:hover::before {
transform: translateX(50%);
    }

    .consult-btn span {
position: relative;
z-index: 2;
    }

    .consult-btn svg {
margin-left: 10px;
width: 20px;
height: 20px;
fill: #ffffff;
transition: transform 0.3s ease;
position: relative;
z-index: 2;
    }

    .consult-btn:hover svg {
transform: translateX(5px);
    }

    /* RESPONSIVE DESIGN */
    @media (max-width: 1024px) {
.consult-container {
    flex-direction: column;
    text-align: center;
    padding: 50px 30px;
    gap: 40px;
}

.consult-label {
    justify-content: center;
}

.consult-text {
    max-width: 100%;
}

.consult-title {
    font-size: 2rem;
}

.consult-action {
    width: 100%;
    display: flex;
    justify-content: center;
}

.consult-btn {
    width: 100%;
    max-width: 400px;
    padding: 20px 30px;
}
    }

    @media (max-width: 480px) {
#drt-consultation-section {
    padding: 60px 20px;
}

.consult-container {
    padding: 40px 20px;
}

.consult-title {
    font-size: 1.55rem; /* Adjusted for safe wrapping on small screens */
}

.consult-desc {
    font-size: 1rem;
}
    }


			
/* [RESET] */
html, body {
    margin: 0 !important;
    padding: 0 !important;
    background-color: #0d0d0f;
}

:root {
    --footer-bg: #0d0d0f;
    --accent-blue: #234177; /* Official Brand Color: Deep Blue */
    --accent-bright: #4a7edb; /* Shimmer/Glow Variant */
    --accent-glow: rgba(35, 65, 119, 0.4);
    --text-main: #ffffff;
    --text-dim: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.08);
    --glass-bg: rgba(255, 255, 255, 0.03);
}

#drt-premium-footer {
    background-color: var(--footer-bg);
    color: var(--text-main);
    padding: 45px 20px 35px; /* Slightly reduced vertical size */
    font-family: 'Inter', 'Noto Sans KR', sans-serif;
    position: relative;
    overflow: hidden;
    width: 100%;
    box-sizing: border-box;
    border-top: 1px solid var(--border-color);
}

/* Top Accent Line - Cybernetic Glow (Restored Animation) */
#drt-premium-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-bright), transparent);
    opacity: 0.8;
    animation: line-pulse 4s infinite alternate;
    z-index: 10;
}

@keyframes line-pulse {
    0% { opacity: 0.3; width: 30%; left: 0; }
    50% { opacity: 1; width: 60%; left: 20%; }
    100% { opacity: 0.3; width: 30%; left: 70%; }
}

/* Subtle Background Patterns */
#drt-premium-footer::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.5;
    pointer-events: none;
}

.footer-container {
    max-width: 1400px;
    width: 95%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 40px; /* Tighter gap */
    position: relative;
    z-index: 20;
}

/* Top Section: Luxury Branding */
.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-branding .logo {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.03rem;
    background: linear-gradient(135deg, #ffffff 40%, var(--accent-bright), #ffffff 80%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
    animation: logo-shimmer 6s linear infinite;
}

@keyframes logo-shimmer {
    to { background-position: 200% center; }
}

.footer-branding .sub-tagline {
    font-size: 0.9rem;
    color: var(--accent-bright);
    text-transform: uppercase;
    letter-spacing: 0.4em;
    margin-top: 8px;
    font-weight: 700;
    opacity: 0.9;
}

.footer-links {
    display: flex;
    gap: 40px;
}

.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    padding: 10px 20px;
    border-radius: 4px;
    background: transparent;
    border: 1px solid transparent;
}

.footer-links a:hover {
    color: #fff;
    background: var(--glass-bg);
    border-color: var(--border-color);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    transform: translateY(-3px);
}

/* Middle Section: Sophisticated Info Grid */
.footer-info {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--border-color);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.info-label {
    font-size: 0.9rem;
    color: var(--accent-bright);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    display: flex;
    align-items: center;
    gap: 10px;
}

.info-label::before {
    content: '';
    width: 5px;
    height: 5px;
    background-color: var(--accent-bright);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-bright);
    animation: dot-pulse 2s ease-in-out infinite;
}

@keyframes dot-pulse {
    0% { transform: scale(1); opacity: 1; box-shadow: 0 0 10px var(--accent-bright); }
    50% { transform: scale(1.5); opacity: 0.7; box-shadow: 0 0 20px var(--accent-bright); }
    100% { transform: scale(1); opacity: 1; box-shadow: 0 0 10px var(--accent-bright); }
}

.info-value {
    font-size: 1.1rem; /* Slightly balanced */
    color: var(--text-main);
    font-weight: 400;
    line-height: 1.7;
    opacity: 0.95;
}

/* Bottom Section: Clean Copyright */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 15px;
}

.copyright {
    font-size: 1rem;
    color: var(--text-dim);
    letter-spacing: 0.02em;
}

.bottom-links {
    display: flex;
    gap: 25px;
    font-size: 0.9rem;
    color: var(--text-main);
    font-weight: 600;
    opacity: 0.6;
    align-items: center;
}

.designer-credit {
    color: var(--accent-bright);
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .footer-info {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

@media (max-width: 768px) {
    #drt-premium-footer {
        padding: 40px 20px 100px;
    }
    .footer-top {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .footer-links {
        gap: 15px;
        flex-direction: column;
        width: 100%;
    }
    .footer-links a {
        padding: 12px;
        font-size: 1rem;
    }
    .footer-info {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    .info-label {
        justify-content: center;
    }
    .info-value {
        font-size: 1.05rem;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

/* 성과로 입증된 프로젝트: 현장 사진 격자 (이 페이지는 rem 기준 10px 이라 px 로 적는다) */
#proven-track-record .record-wall { margin-top: 0; }
#proven-track-record .record-wall-title { margin: 0 0 24px; font-size: 32px; font-weight: 800; color: var(--drt-navy, #234177); letter-spacing: -0.01em; }
#proven-track-record .record-wall-title span { display: block; margin-top: 8px; font-size: 16px; font-weight: 500; color: #6b7280; }
#proven-track-record .record-wall-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 10px; }
#proven-track-record .record-wall-grid figure { margin: 0; aspect-ratio: 1 / 1; overflow: hidden; border-radius: 10px; background: #e5e7eb; }
#proven-track-record .record-wall-grid img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s; }
#proven-track-record .record-wall-grid figure:hover img { transform: scale(1.06); }
@media (max-width: 900px) { #proven-track-record .record-wall-grid { grid-template-columns: repeat(3, 1fr); gap: 8px; } #proven-track-record .record-wall-title { font-size: 24px; } }

/* ============================================================
   사업분야(B 안): bz- 접두어. 드론 한 대와 조종기를 한 장의 시스템 도면으로 — 점으로 표시한 곳이 DRT가 만드는 부분.
   도면 좌표는 viewBox 1200x660 기준 %, rem 은 10px 기준(remRoot: 10)
   ============================================================ */
.bz-sys { padding: 40px 0 120px; }

/* 절 머리: 작은 영문 라벨 + 제목 + 한 줄 */
.bz-head { max-width: 860px; margin-bottom: 44px; }
.bz-label { display: block; margin-bottom: 14px; font-size: 1.3rem; font-weight: 800; letter-spacing: 0.2em; text-transform: uppercase; color: var(--drt-bright); }
.bz-head h2 { margin: 0; font-size: 4.4rem; font-weight: 900; line-height: 1.2; letter-spacing: -0.025em; color: var(--drt-accent); word-break: keep-all; }
.bz-head p { margin: 18px 0 0; font-size: 1.75rem; line-height: 1.7; color: var(--drt-text-dim); word-break: keep-all; }

/* 사업 분야: 왼쪽 분야 목록(탭) + 오른쪽 큰 사진과 실적. 스크립트가 없으면 모든 분야가 차례로 보인다 */
.bz-areas { padding: 120px 0 80px; }
.bz-area { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 8fr); gap: 48px; align-items: start; }
.bz-area-tabs { display: flex; flex-direction: column; border-top: 2px solid var(--drt-accent); }
.bz-area-tabs button { position: relative; display: block; width: 100%; padding: 22px 8px 22px 22px; border: 0; border-bottom: 1px solid rgba(35, 65, 119, 0.12); background: none; font: inherit; text-align: left; cursor: pointer; color: var(--drt-text-dim); transition: background-color .15s, color .15s; }
.bz-area-tabs button::before { content: ""; position: absolute; left: 0; top: 22px; bottom: 22px; width: 3px; border-radius: 2px; background: transparent; transition: background-color .15s; }
.bz-area-tabs b { display: block; font-size: 2.2rem; font-weight: 800; letter-spacing: -0.01em; color: inherit; }
.bz-area-tabs span { display: block; margin-top: 6px; font-size: 1.4rem; line-height: 1.5; word-break: keep-all; }
.bz-area-tabs button:hover { color: var(--drt-accent); }
.bz-area-tabs button[aria-selected="true"] { color: var(--drt-accent); background: rgba(35, 65, 119, 0.04); }
.bz-area-tabs button[aria-selected="true"]::before { background: var(--drt-accent); }
.bz-area-tabs button:focus-visible { outline: 2px solid var(--drt-bright); outline-offset: -2px; }
html:not(.js) .bz-area-tabs { display: none; }
html:not(.js) .bz-area { grid-template-columns: 1fr; }
html.js .bz-area-panel:not(.is-on) { display: none; }
.bz-area-panel + .bz-area-panel { margin-top: 48px; }
html.js .bz-area-panel + .bz-area-panel { margin-top: 0; }
.bz-area-panel figure { margin: 0; aspect-ratio: 16 / 9; border-radius: 16px; overflow: hidden; background: #e6e8ec; }
.bz-area-panel img { width: 100%; height: 100%; object-fit: cover; display: block; }
.bz-area-info { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 8px 32px; padding: 24px 4px 0; }
.bz-area-info h3 { grid-column: 1 / -1; margin: 0; font-size: 2.6rem; font-weight: 900; color: var(--drt-accent); }
.bz-area-info > p { grid-column: 1 / -1; margin: 0 0 10px; font-size: 1.6rem; line-height: 1.6; color: var(--drt-text-main); word-break: keep-all; }
.bz-area-info h4 { margin: 0 0 8px; font-size: 1.25rem; font-weight: 800; letter-spacing: 0.04em; color: var(--drt-text-dim); }
.bz-area-rec ul { margin: 0; padding: 0; list-style: none; }
.bz-area-rec li { position: relative; padding: 4px 0 4px 16px; font-size: 1.5rem; line-height: 1.55; color: var(--drt-text-main); word-break: keep-all; }
.bz-area-rec li::before { content: ""; position: absolute; left: 0; top: 13px; width: 6px; height: 6px; border-radius: 50%; background: var(--drt-bright); }
.bz-area-prod div { display: flex; flex-wrap: wrap; gap: 8px; }
.bz-area-prod a { padding: 6px 16px; border-radius: 999px; border: 1px solid rgba(35, 65, 119, 0.25); font-size: 1.4rem; font-weight: 700; color: var(--drt-accent); text-decoration: none; transition: background-color .15s, color .15s; }
.bz-area-prod a:hover { background: var(--drt-accent); color: #fff; }
/* 넓은 화면에서는 왼쪽 탭이 이름·요약을 보여 주므로 판 안에서는 되풀이하지 않는다 */
@media (min-width: 1024px) { html.js .bz-area-info h3, html.js .bz-area-info > p { display: none; } }

/* 도면: 옅은 모눈 위에 기체·조종기·지시선 */
.bz-draw { position: relative; aspect-ratio: 1200 / 660; margin: 56px 0 0; border: 1px solid rgba(35, 65, 119, 0.12); border-radius: 20px; background-color: #f7f9fc; background-image: linear-gradient(rgba(35, 65, 119, 0.055) 1px, transparent 1px), linear-gradient(90deg, rgba(35, 65, 119, 0.055) 1px, transparent 1px); background-size: 24px 24px; background-position: -1px -1px; }
.bz-draw-lines { position: absolute; inset: 0; z-index: 2; width: 100%; height: 100%; overflow: visible; pointer-events: none; }
.bz-draw-lines polyline, .bz-draw-lines line { fill: none; stroke: var(--drt-accent); stroke-width: 1.2; vector-effect: non-scaling-stroke; opacity: 0.55; }
.bz-draw-lines .bz-dot-line { stroke-dasharray: 2 5; opacity: 0.45; }
.bz-draw-lines .bz-pt { fill: var(--drt-accent); stroke: #fff; stroke-width: 3; vector-effect: non-scaling-stroke; }
.bz-draw-lines .bz-link { fill: none; stroke: var(--drt-bright); stroke-width: 2.2; stroke-dasharray: 10 8; vector-effect: non-scaling-stroke; }
.bz-draw-lines .bz-lock { fill: #fff; stroke: var(--drt-bright); stroke-width: 2; vector-effect: non-scaling-stroke; }
.bz-draw-lines .bz-lock-icon { fill: none; stroke: var(--drt-accent); stroke-width: 1.8; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.bz-draw-drone { position: absolute; left: 21.667%; top: 25.758%; width: 36.667%; height: auto; }
.bz-draw-gcs { position: absolute; left: 66.667%; top: 28.788%; width: 26.667%; height: auto; }
.bz-notes { margin: 0; padding: 0; list-style: none; }
.bz-note { position: absolute; width: 19.167%; transform: translateY(-50%); text-align: right; }
.bz-note b { display: block; font-size: 1.6rem; font-weight: 800; line-height: 1.3; color: var(--drt-accent); word-break: keep-all; }
.bz-note span { display: block; margin-top: 3px; font-size: 1.3rem; line-height: 1.45; color: var(--drt-text-dim); word-break: keep-all; }
.bz-note.n-fw { left: 0; top: 26.515%; }
.bz-note.n-frame { left: 0; top: 38.636%; }
.bz-note.n-power { left: 0; top: 50.758%; }
.bz-note.n-payload { left: 0; top: 62.879%; }
.bz-note.n-link { left: 60.417%; top: 3%; width: 300px; transform: translateX(-50%); text-align: center; }
.bz-note.n-gcs { left: 80%; top: 68.5%; width: 290px; transform: translateX(-50%); text-align: center; }
.bz-note.n-server { left: 50%; top: 84.848%; width: 40%; transform: translateX(-50%); padding: 12px 20px; border: 1px solid rgba(35, 65, 119, 0.25); border-radius: 12px; background: #fff; text-align: center; }
.bz-draw figcaption { position: absolute; left: 24px; top: 20px; max-width: 34%; font-size: 1.25rem; line-height: 1.5; color: var(--drt-text-dim); }
.bz-draw figcaption::before { content: ""; display: inline-block; width: 9px; height: 9px; margin-right: 8px; border-radius: 50%; background: var(--drt-accent); vertical-align: 1px; }
.bz-draw .bz-note:first-child { padding-left: 16px; }

/* 특수 목적 드론: 설계 도면 세 장(큰 것 하나 + 작은 것 둘) */
/* 도면은 자르지 않고(contain) 칸 배경을 도면 바탕색에 맞춰 이어 보이게 */
.bz-area-panel figure.bz-bp { display: grid; grid-template-columns: 3fr 2fr; grid-template-rows: 1fr 1fr; gap: 6px; background: #fff; }
.bz-bp img { width: 100%; height: 100%; min-height: 0; object-fit: contain; display: block; border-radius: 10px; background: #032551; }
.bz-bp img:first-child { grid-row: 1 / span 2; }
.bz-bp img:nth-child(2) { background: #042f61; }
.bz-bp img:nth-child(3) { background: #002a5b; }

/* 개발 프로세스: 다섯 단계를 가는 선으로 잇는다 */
.bz-proc { padding: 40px 0 110px; }
.bz-steps { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; margin: 0; padding: 0; list-style: none; }
.bz-steps::before { content: ""; position: absolute; top: 23px; left: 23px; right: calc((100% - 96px) / 5 - 23px); height: 1px; background: rgba(35, 65, 119, 0.25); }
.bz-steps li { position: relative; }
.bz-steps i { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; background: #fff; border: 1.5px solid var(--drt-accent); font-style: normal; font-size: 1.45rem; font-weight: 800; color: var(--drt-accent); font-variant-numeric: tabular-nums; }
.bz-steps b { display: block; margin-top: 18px; font-size: 1.9rem; font-weight: 800; color: var(--drt-accent); word-break: keep-all; }
.bz-steps span { display: block; margin-top: 8px; font-size: 1.45rem; line-height: 1.6; color: var(--drt-text-dim); word-break: keep-all; }

/* 기술 확장성: 짙은 남색 띠, 왼쪽 글 + 오른쪽 핵심 묶음 → 세 가지 플랫폼 */
.bz-scale { padding: 110px 0; background: #06254f; background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px); background-size: 32px 32px; color: #fff; }
.bz-scale-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 64px; align-items: center; }
.bz-scale .bz-head { margin-bottom: 0; }
.bz-scale .bz-label { color: #8fb4ff; }
.bz-scale .bz-head h2 { color: #fff; }
.bz-scale .bz-head p { color: rgba(255, 255, 255, 0.72); }
.bz-scale-map { position: relative; display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 3fr); gap: 48px; align-items: center; }
.bz-core { position: relative; padding: 24px; border: 1px solid rgba(143, 180, 255, 0.5); border-radius: 14px; background: rgba(255, 255, 255, 0.06); }
.bz-core::after { content: ""; position: absolute; top: 50%; right: -48px; width: 48px; height: 1px; background: rgba(143, 180, 255, 0.6); }
.bz-core b { display: block; font-size: 2rem; font-weight: 900; letter-spacing: 0.02em; }
.bz-core ul { margin: 14px 0 0; padding: 0; list-style: none; }
.bz-core li { padding: 9px 0; border-top: 1px solid rgba(255, 255, 255, 0.12); font-size: 1.45rem; color: rgba(255, 255, 255, 0.85); }
.bz-plats { position: relative; margin: 0; padding: 0 0 0 20px; list-style: none; border-left: 1px solid rgba(143, 180, 255, 0.6); }
.bz-plat { position: relative; display: grid; grid-template-columns: 52px 1fr auto; gap: 16px; align-items: center; padding: 16px 0; }
.bz-plat + .bz-plat { border-top: 1px solid rgba(255, 255, 255, 0.1); }
.bz-plat::before { content: ""; position: absolute; left: -20px; top: 50%; width: 20px; height: 1px; background: rgba(143, 180, 255, 0.6); }
.bz-plat-icon { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 12px; background: rgba(255, 255, 255, 0.08); color: #cfe0ff; }
.bz-plat-icon svg { width: 28px; height: 28px; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.bz-plat b { display: block; font-size: 1.8rem; font-weight: 800; }
.bz-plat b small { margin-left: 6px; font-size: 1.2rem; font-weight: 700; letter-spacing: 0.08em; color: rgba(255, 255, 255, 0.5); }
.bz-plat p { margin: 4px 0 0; font-size: 1.35rem; line-height: 1.5; color: rgba(255, 255, 255, 0.7); word-break: keep-all; }
.bz-plat em { font-style: normal; padding: 4px 12px; border-radius: 999px; border: 1px solid rgba(255, 255, 255, 0.25); font-size: 1.2rem; font-weight: 700; color: rgba(255, 255, 255, 0.7); white-space: nowrap; }
.bz-plat.is-live em { border-color: #8fb4ff; background: rgba(143, 180, 255, 0.18); color: #fff; }
.bz-plat.is-live .bz-plat-icon { background: rgba(143, 180, 255, 0.25); color: #fff; }

/* 등장 효과: site.js 가 bz-reveal 에 bz-active 를 붙인다(회사소개 ab-reveal 과 같은 방식).
   도면은 지시선이 그려진 뒤 설명이 차례로, 프로세스·플랫폼은 순서대로 나타난다. 움직임 줄이기면 모두 바로 보인다 */
html.js .bz-reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
html.js .bz-reveal.bz-active { opacity: 1; transform: none; }
html.js .bz-draw .bz-note, html.js .bz-draw figcaption, html.js .bz-draw-drone, html.js .bz-draw-gcs { opacity: 0; transition: opacity .6s ease; }
html.js .bz-draw.bz-active .bz-draw-drone { opacity: 1; transition-delay: .15s; }
html.js .bz-draw.bz-active .bz-draw-gcs { opacity: 1; transition-delay: .3s; }
html.js .bz-draw-lines polyline:not(.bz-dot-line), html.js .bz-draw-lines line { stroke-dasharray: 600; stroke-dashoffset: 600; transition: stroke-dashoffset 1s ease .5s; }
html.js .bz-draw.bz-active .bz-draw-lines polyline:not(.bz-dot-line), html.js .bz-draw.bz-active .bz-draw-lines line { stroke-dashoffset: 0; }
html.js .bz-draw-lines .bz-pt, html.js .bz-draw-lines .bz-link, html.js .bz-draw-lines .bz-lock, html.js .bz-draw-lines .bz-lock-icon, html.js .bz-draw-lines .bz-dot-line { opacity: 0; transition: opacity .5s ease 1.2s; }
html.js .bz-draw.bz-active .bz-draw-lines .bz-pt, html.js .bz-draw.bz-active .bz-draw-lines .bz-link, html.js .bz-draw.bz-active .bz-draw-lines .bz-lock, html.js .bz-draw.bz-active .bz-draw-lines .bz-lock-icon { opacity: 1; }
html.js .bz-draw.bz-active .bz-draw-lines .bz-dot-line { opacity: 0.45; }
html.js .bz-draw.bz-active .bz-note, html.js .bz-draw.bz-active figcaption { opacity: 1; }
html.js .bz-draw.bz-active .n-fw { transition-delay: .7s; }
html.js .bz-draw.bz-active .n-frame { transition-delay: .85s; }
html.js .bz-draw.bz-active .n-power { transition-delay: 1s; }
html.js .bz-draw.bz-active .n-payload { transition-delay: 1.15s; }
html.js .bz-draw.bz-active .n-link { transition-delay: 1.35s; }
html.js .bz-draw.bz-active .n-gcs { transition-delay: 1.5s; }
html.js .bz-draw.bz-active .n-server { transition-delay: 1.65s; }
html.js .bz-draw.bz-active figcaption { transition-delay: 1.8s; }
html.js .bz-steps::before { transform: scaleX(0); transform-origin: left center; transition: transform 1.2s ease .2s; }
html.js .bz-steps.bz-active::before { transform: scaleX(1); }
html.js .bz-steps li, html.js .bz-plats li, html.js .bz-core { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
html.js .bz-steps.bz-active li, html.js .bz-scale-map.bz-active li, html.js .bz-scale-map.bz-active .bz-core { opacity: 1; transform: none; }
html.js .bz-steps.bz-active li:nth-child(2), html.js .bz-scale-map.bz-active .bz-plat:nth-child(1) { transition-delay: .15s; }
html.js .bz-steps.bz-active li:nth-child(3), html.js .bz-scale-map.bz-active .bz-plat:nth-child(2) { transition-delay: .3s; }
html.js .bz-steps.bz-active li:nth-child(4), html.js .bz-scale-map.bz-active .bz-plat:nth-child(3) { transition-delay: .45s; }
html.js .bz-steps.bz-active li:nth-child(5) { transition-delay: .6s; }
@media (prefers-reduced-motion: reduce) {
  html.js .bz-reveal, html.js .bz-draw .bz-note, html.js .bz-draw figcaption, html.js .bz-draw-drone, html.js .bz-draw-gcs, html.js .bz-draw-lines *, html.js .bz-steps li, html.js .bz-plats li, html.js .bz-core { opacity: 1; transform: none; transition: none; stroke-dashoffset: 0; }
  html.js .bz-draw-lines .bz-dot-line { opacity: 0.45; }
  html.js .bz-steps::before { transform: none; transition: none; }
}

/* 1024 미만: 도면을 풀어 사진 두 장 + 설명 목록으로 */
@media (max-width: 1023px) {
  .bz-areas { padding: 88px 0 56px; }
  .bz-sys { padding: 24px 0 88px; }
  .bz-head h2 { font-size: 3.4rem; }
  .bz-area { grid-template-columns: 1fr; gap: 24px; }
  .bz-area-tabs { flex-direction: row; overflow-x: auto; border-top: 0; border-bottom: 1px solid rgba(35, 65, 119, 0.12); }
  .bz-area-tabs button { flex: none; width: auto; padding: 12px 18px; border-bottom: 0; }
  .bz-area-tabs button::before { left: 12px; right: 12px; top: auto; bottom: -1px; width: auto; height: 3px; }
  .bz-area-tabs b { font-size: 1.7rem; white-space: nowrap; }
  .bz-area-tabs span { display: none; }
  .bz-draw { aspect-ratio: auto; display: grid; grid-template-columns: 3fr 2fr; gap: 16px 24px; align-items: center; padding: 28px 24px 24px; }
  .bz-draw-lines { display: none; }
  .bz-draw-drone, .bz-draw-gcs { position: static; width: 100%; }
  .bz-notes { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; gap: 18px 28px; margin-top: 8px; }
  .bz-draw .bz-note { position: relative; left: auto; top: auto; width: auto; transform: none; text-align: left; padding: 0 0 0 18px; border: 0; background: none; border-radius: 0; }
  .bz-note::before { content: ""; position: absolute; left: 0; top: 7px; width: 9px; height: 9px; border-radius: 50%; background: var(--drt-accent); }
  .bz-draw figcaption { position: static; grid-column: 1 / -1; max-width: none; padding: 0; }
  .bz-steps { grid-template-columns: 1fr 1fr 1fr; row-gap: 36px; }
  .bz-steps::before { display: none; }
  .bz-scale { padding: 80px 0; }
  .bz-scale-grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 640px) {
  .bz-areas { padding: 64px 0 40px; }
  .bz-sys { padding: 16px 0 64px; }
  .bz-head h2 { font-size: 2.7rem; }
  .bz-head p { font-size: 1.55rem; }
  .bz-area-info { grid-template-columns: 1fr; }
  .bz-area-info h3 { font-size: 2.2rem; }
  .bz-steps { grid-template-columns: 1fr; row-gap: 22px; }
  .bz-steps li { display: grid; grid-template-columns: 46px 1fr; column-gap: 16px; }
  .bz-steps b { margin-top: 0; align-self: center; }
  .bz-steps span { grid-column: 2; margin-top: 4px; }
  .bz-scale-map { grid-template-columns: 1fr; gap: 20px; }
  .bz-core::after { display: none; }
  .bz-plats { padding-left: 0; border-left: 0; }
  .bz-plat::before { display: none; }
  .bz-plat { grid-template-columns: 44px 1fr; }
  .bz-plat-icon { width: 44px; height: 44px; }
  .bz-plat em { grid-column: 2; justify-self: start; }
  .bz-draw { grid-template-columns: 1fr; padding: 20px 16px; }
  .bz-draw-gcs { width: 78%; justify-self: center; }
  .bz-notes { grid-template-columns: 1fr; gap: 14px; }
}