/* ============================================
   理森工程公司 - 自定义主题样式
   深棕黑 + 金色 高端工业风
   ============================================ */

/* ===== CSS Variables ===== */
:root {
    --color-bg-primary: #220a08;
    --color-bg-secondary: #1a0805;
    --color-bg-tertiary: #150503;
    --color-bg-card: #2d120e;
    --color-bg-card-hover: #361611;

    --color-gold: #fac960;
    --color-gold-bright: #ffd97a;
    --color-gold-dark: #a87505;
    --color-gold-deeper: #8a5e03;
    --color-gold-light: #ffaf55;

    --color-text-primary: #ffffff;
    --color-text-secondary: #f0d090;
    --color-text-muted: #a08070;
    --color-text-dim: #6a4a3a;

    --color-border: rgba(250, 201, 96, 0.15);
    --color-border-hover: rgba(250, 201, 96, 0.4);

    --font-heading: 'Noto Sans SC', 'PingFang SC', sans-serif;
    --font-body: 'Noto Sans SC', 'PingFang SC', sans-serif;
    --font-display: 'Outfit', 'Noto Sans SC', sans-serif;

    --shadow-gold: 0 8px 32px rgba(250, 201, 96, 0.15);
    --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.4);
    --shadow-card-hover: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(250, 201, 96, 0.1);

    --transition-base: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --transition-fast: all 0.25s ease;
}

/* ===== Reset & Base ===== */
* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    overflow-x: hidden;
    line-height: 1.7;
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Background texture */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(ellipse at 20% 0%, rgba(168, 117, 5, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 100%, rgba(250, 201, 96, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

body > * {
    position: relative;
    z-index: 1;
}

::selection {
    background: var(--color-gold);
    color: var(--color-bg-primary);
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}
::-webkit-scrollbar-thumb {
    background: var(--color-gold-dark);
    border-radius: 5px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-gold);
}

/* ===== Typography Helpers ===== */
.text-gold {
    color: var(--color-gold) !important;
}

.text-gradient-gold {
    background: linear-gradient(135deg, var(--color-gold-bright) 0%, var(--color-gold) 40%, var(--color-gold-light) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== Buttons ===== */
.btn {
    font-family: var(--font-heading);
    font-weight: 500;
    border-radius: 4px;
    letter-spacing: 0.5px;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-gold {
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
    color: var(--color-bg-primary);
    border: none;
    box-shadow: 0 4px 20px rgba(250, 201, 96, 0.25);
}

.btn-gold::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.6s;
}

.btn-gold:hover {
    background: linear-gradient(135deg, var(--color-gold-bright) 0%, var(--color-gold) 100%);
    color: var(--color-bg-primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(250, 201, 96, 0.4);
}

.btn-gold:hover::before {
    left: 100%;
}

.btn-outline-gold {
    background: transparent;
    color: var(--color-gold);
    border: 1.5px solid var(--color-gold-dark);
}

.btn-outline-gold:hover {
    background: rgba(250, 201, 96, 0.1);
    border-color: var(--color-gold);
    color: var(--color-gold-bright);
    transform: translateY(-2px);
}

/* ===== Navbar ===== */
.custom-navbar {
    background: rgba(34, 10, 8, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    padding: 1rem 0;
    transition: var(--transition-base);
}

.custom-navbar.scrolled {
    background: rgba(21, 5, 3, 0.92);
    border-bottom: 1px solid var(--color-border);
    padding: 0.6rem 0;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.navbar-brand {
    text-decoration: none;
}

.brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
    color: var(--color-bg-primary);
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: 1.4rem;
    border-radius: 6px;
    box-shadow: 0 4px 15px rgba(250, 201, 96, 0.3);
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.brand-name {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

.brand-sub {
    font-family: var(--font-display);
    font-size: 0.65rem;
    letter-spacing: 2px;
    color: var(--color-gold-dark);
    text-transform: uppercase;
}

.nav-link {
    color: var(--color-text-secondary) !important;
    font-weight: 400;
    font-size: 0.95rem;
    padding: 0.5rem 1.1rem !important;
    position: relative;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-gold);
    transition: var(--transition-fast);
    transform: translateX(-50%);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-gold) !important;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 30%;
}

/* Navbar toggler */
.navbar-toggler {
    border: none;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
}

.toggler-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-gold);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.navbar-toggler[aria-expanded="true"] .toggler-line:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.navbar-toggler[aria-expanded="true"] .toggler-line:nth-child(2) {
    opacity: 0;
}
.navbar-toggler[aria-expanded="true"] .toggler-line:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ===== Section Base ===== */
.section {
    padding: 6rem 0;
    position: relative;
}

.section-label {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.label-number {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-gold-dark);
    letter-spacing: 2px;
    position: relative;
    padding-right: 1rem;
}

.label-number::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 1px;
    height: 20px;
    background: var(--color-gold-dark);
}

.label-text {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    color: var(--color-gold);
    letter-spacing: 4px;
    text-transform: uppercase;
}

.section-title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    color: var(--color-text-primary);
    margin-bottom: 1rem;
    line-height: 1.3;
}

.section-desc {
    color: var(--color-text-muted);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== Hero Section ===== */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 120px 0 80px;
    background: var(--color-bg-primary);
}

.hero-bg-glow {
    position: absolute;
    top: 20%;
    right: -10%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(250, 201, 96, 0.12) 0%, rgba(168, 117, 5, 0.06) 30%, transparent 70%);
    border-radius: 50%;
    animation: glow-breathe 8s ease-in-out infinite;
    pointer-events: none;
}

@keyframes glow-breathe {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.1); opacity: 1; }
}

.hero-grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(250, 201, 96, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(250, 201, 96, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 1.2rem;
    background: rgba(250, 201, 96, 0.08);
    border: 1px solid var(--color-border);
    border-radius: 30px;
    font-size: 0.85rem;
    color: var(--color-gold);
    margin-bottom: 1.5rem;
}

.hero-badge i {
    color: var(--color-gold-bright);
}

.hero-title {
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.15;
    margin-bottom: 1.5rem;
    color: var(--color-text-primary);
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 580px;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.hero-actions {
    margin-bottom: 3rem;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-gold);
    line-height: 1;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    margin-top: 0.3rem;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-border);
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--color-text-muted);
    transition: var(--transition-fast);
}

.scroll-indicator:hover {
    color: var(--color-gold);
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid currentColor;
    border-radius: 12px;
    display: flex;
    justify-content: center;
    padding-top: 6px;
}

.wheel {
    width: 3px;
    height: 8px;
    background: currentColor;
    border-radius: 2px;
    animation: wheel-scroll 2s ease-in-out infinite;
}

@keyframes wheel-scroll {
    0% { transform: translateY(0); opacity: 1; }
    100% { transform: translateY(12px); opacity: 0; }
}

.scroll-text {
    font-family: var(--font-display);
    font-size: 0.7rem;
    letter-spacing: 2px;
}

/* ===== About Section ===== */
.about-section {
    background: var(--color-bg-secondary);
}

/* About banner image */
.about-banner {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-card);
}

.about-banner img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 1s ease;
}

.about-banner:hover img {
    transform: scale(1.03);
}

.about-banner-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 2rem;
    background: linear-gradient(to top, rgba(21, 5, 3, 0.9) 0%, transparent 100%);
    display: flex;
    align-items: flex-end;
}

.banner-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.2rem;
    background: rgba(250, 201, 96, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: 30px;
    font-size: 0.85rem;
    color: var(--color-gold);
}

.banner-tag i {
    color: var(--color-gold-bright);
}

.about-decoration {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-gold) 0%, transparent 100%);
    margin-top: 1rem;
}

.about-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.about-block {
    padding-left: 1.5rem;
    border-left: 2px solid var(--color-border);
    transition: var(--transition-base);
}

.about-block:hover {
    border-left-color: var(--color-gold);
}

.about-block-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-gold);
    margin-bottom: 0.6rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.about-block-title i {
    font-size: 1.1rem;
}

.about-block-text {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.8;
    margin: 0;
}

/* ===== Services Section ===== */
.services-section {
    background: var(--color-bg-primary);
}

.service-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 0 0 2rem 0;
    height: 100%;
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
    z-index: 2;
}

.service-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-8px);
    box-shadow: var(--shadow-card-hover);
}

.service-card:hover::before {
    transform: scaleX(1);
}

/* Service card image */
.service-image {
    width: 100%;
    height: 240px;
    overflow: hidden;
    position: relative;
    margin-bottom: 1.5rem;
}

.service-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.service-card:hover .service-image img {
    transform: scale(1.08);
}

.service-card .service-number {
    top: 0.8rem;
    right: 1rem;
    z-index: 2;
}

.service-card .service-title,
.service-card .service-text {
    padding: 0 2rem;
}

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    background: rgba(250, 201, 96, 0.1);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: var(--transition-base);
}

.service-icon i {
    font-size: 1.8rem;
    color: var(--color-gold);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
    border-color: var(--color-gold);
    transform: rotate(-5deg);
}

.service-card:hover .service-icon i {
    color: var(--color-bg-primary);
}

.service-number {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: rgba(250, 201, 96, 0.08);
    line-height: 1;
}

.service-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: 0.8rem;
}

.service-text {
    color: var(--color-text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
    margin: 0;
}

/* ===== Technology Section ===== */
.technology-section {
    background: var(--color-bg-secondary);
}

/* ===== Tech Block (LED 顯示技術) ===== */
.tech-block {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-card);
    transition: var(--transition-base);
}

.tech-block:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-card-hover);
}

.tech-block-image {
    position: relative;
    height: 100%;
    min-height: 380px;
    overflow: hidden;
}

.tech-block-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.tech-block:hover .tech-block-image img {
    transform: scale(1.05);
}

.tech-block-image-label {
    position: absolute;
    top: 1.5rem;
    left: 1.5rem;
    z-index: 2;
    padding: 0.5rem 1.2rem;
    background: rgba(250, 201, 96, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: 30px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    color: var(--color-gold);
    letter-spacing: 1px;
}

.tech-block-content {
    padding: 3rem 2.5rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.tech-block-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tech-block-num {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-gold-dark);
    line-height: 1;
}

.tech-block-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0;
}

.tech-block-lead {
    color: var(--color-text-secondary);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.tech-block-divider {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-gold) 0%, transparent 100%);
    margin-bottom: 1.5rem;
}

.tech-sub-item {
    margin-bottom: 1.5rem;
    padding-left: 1rem;
    border-left: 2px solid var(--color-border);
    transition: var(--transition-fast);
}

.tech-sub-item:last-child {
    margin-bottom: 0;
}

.tech-sub-item:hover {
    border-left-color: var(--color-gold);
}

.tech-sub-title {
    font-family: var(--font-heading);
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-gold);
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tech-sub-title i {
    font-size: 1rem;
}

.tech-sub-text {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 0.6rem;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tech-tag {
    font-family: var(--font-display);
    font-size: 0.72rem;
    padding: 0.2rem 0.7rem;
    background: rgba(250, 201, 96, 0.08);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    color: var(--color-gold);
    letter-spacing: 0.5px;
}

/* ===== Cases Section ===== */
.cases-section {
    background: var(--color-bg-primary);
}

/* Case group header */
.case-group {
    margin-bottom: 4rem;
}

.case-group:last-child {
    margin-bottom: 0;
}

.case-group-header {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
}

.case-group-num {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--color-gold-dark);
    line-height: 1;
}

.case-group-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 0;
    white-space: nowrap;
}

.case-group-line {
    flex: 1;
    height: 1px;
    background: linear-gradient(90deg, var(--color-gold-dark) 0%, transparent 100%);
}

.case-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 0 1.8rem 1.8rem;
    height: 100%;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

/* Case card image */
.case-image {
    width: calc(100% + 3.6rem);
    height: 200px;
    overflow: hidden;
    position: relative;
    margin: 0 -1.8rem 1.2rem;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.08);
}

.case-card .case-header {
    position: relative;
    z-index: 2;
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60px;
    height: 60px;
    background: radial-gradient(circle at top right, rgba(250, 201, 96, 0.1) 0%, transparent 70%);
    transition: var(--transition-base);
}

.case-card:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-border-hover);
    transform: translateY(-6px);
    box-shadow: var(--shadow-card-hover);
}

.case-card:hover::before {
    width: 120px;
    height: 120px;
}

.case-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.case-number {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-gold-dark);
    line-height: 1;
}

.case-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: rgba(250, 201, 96, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.case-icon i {
    font-size: 1.1rem;
    color: var(--color-gold);
}

.case-card:hover .case-icon {
    background: var(--color-gold);
    transform: scale(1.1);
}

.case-card:hover .case-icon i {
    color: var(--color-bg-primary);
}

.case-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: 0.6rem;
    line-height: 1.4;
    min-height: 3rem;
}

.case-text {
    color: var(--color-text-muted);
    font-size: 0.88rem;
    line-height: 1.65;
    margin-bottom: 1rem;
}

.case-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.case-tag {
    font-size: 0.7rem;
    padding: 0.15rem 0.6rem;
    background: rgba(250, 201, 96, 0.06);
    border: 1px solid rgba(250, 201, 96, 0.12);
    border-radius: 12px;
    color: var(--color-text-secondary);
}

/* ===== Contact Section ===== */
.contact-section {
    background: var(--color-bg-secondary);
}

.contact-info-wrapper {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    padding: 3.5rem 3rem;
    position: relative;
    overflow: hidden;
}

.contact-info-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-gold-dark) 50%, transparent 100%);
}

.contact-info-top {
    text-align: center;
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.contact-brand {
    display: inline-flex;
    align-items: center;
    gap: 1.2rem;
}

.brand-mark-lg {
    width: 64px;
    height: 64px;
    font-size: 2rem;
}

.contact-brand-text {
    text-align: left;
}

.contact-info-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-gold);
    margin-bottom: 0.3rem;
}

.contact-info-desc {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin: 0;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.2rem 1.5rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
    cursor: pointer;
}

.contact-info-item:hover {
    background: rgba(250, 201, 96, 0.05);
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
}

.contact-icon {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    background: rgba(250, 201, 96, 0.08);
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition-base);
}

.contact-icon i {
    font-size: 1.1rem;
    color: var(--color-gold);
}

.contact-info-item:hover .contact-icon {
    background: var(--color-gold);
}

.contact-info-item:hover .contact-icon i {
    color: var(--color-bg-primary);
}

.contact-detail {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.contact-value {
    font-size: 1rem;
    color: var(--color-text-primary);
    font-weight: 500;
}

/* ===== Footer ===== */
.footer-section {
    background: var(--color-bg-tertiary);
    padding: 0;
}

.footer-gold-line {
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--color-gold-dark) 30%,
        var(--color-gold) 50%,
        var(--color-gold-dark) 70%,
        transparent 100%);
}

.footer-brand {
    gap: 0.7rem !important;
}

.footer-brand-name {
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

.footer-contact {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-gold);
}

.footer-sep {
    color: var(--color-text-dim);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.82rem;
    color: var(--color-text-dim);
}

/* ===== Back to Top ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
    color: var(--color-bg-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.2rem;
    box-shadow: 0 4px 20px rgba(250, 201, 96, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition-base);
    z-index: 1000;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(250, 201, 96, 0.5);
}

/* ===== AOS Override ===== */
[data-aos] {
    pointer-events: auto;
}

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background: rgba(21, 5, 3, 0.95);
        margin-top: 1rem;
        padding: 1.5rem;
        border-radius: 8px;
        border: 1px solid var(--color-border);
    }

    .navbar-nav {
        gap: 0.3rem;
    }

    .nav-link {
        padding: 0.8rem 1rem !important;
    }

    .nav-item .btn {
        margin-top: 0.5rem;
        width: 100%;
    }

    .hero-stats {
        gap: 1.2rem;
    }

    .stat-number {
        font-size: 1.8rem;
    }
}

@media (max-width: 767.98px) {
    .section {
        padding: 4rem 0;
    }

    .hero-section {
        padding: 100px 0 60px;
        min-height: auto;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 1rem;
    }

    .stat-divider {
        display: none;
    }

    .hero-actions .btn {
        display: block;
        width: 100%;
    }

    .scroll-indicator {
        display: none;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .about-block {
        padding-left: 1rem;
    }

    .tech-block-image {
        min-height: 260px;
    }

    .tech-block-content {
        padding: 2rem 1.5rem;
    }

    .tech-block-title {
        font-size: 1.3rem;
    }

    .contact-info-wrapper {
        padding: 2rem 1.5rem;
    }

    .contact-info-grid {
        grid-template-columns: 1fr;
    }

    .contact-brand {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .contact-brand-text {
        text-align: center;
    }

    .case-title {
        min-height: auto;
    }

    .case-group-header {
        gap: 0.8rem;
    }

    .case-group-num {
        font-size: 1.6rem;
    }

    .case-group-title {
        font-size: 1.1rem;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
}

@media (max-width: 575.98px) {
    .brand-sub {
        display: none;
    }

    .brand-name {
        font-size: 1rem;
    }

    .brand-mark {
        width: 36px;
        height: 36px;
        font-size: 1.2rem;
    }

    .hero-badge {
        font-size: 0.75rem;
        padding: 0.4rem 1rem;
    }
}