/* ===================================
   KORIA Corporate Website Styles
   Premium Modern Design
   Primary Color: #3B82F6
   =================================== */

/* CSS Variables */
:root {
    /* Colors - Premium Blue Palette */
    --color-primary: #0f172a;
    --color-primary-light: #1e293b;
    --color-primary-dark: #020617;
    --color-accent: #3B82F6;
    --color-accent-light: #60a5fa;
    --color-accent-dark: #2563eb;
    --color-accent-glow: rgba(59, 130, 246, 0.4);

    /* Solid Accent Color - No Gradients */
    --gradient-primary: #3B82F6;
    --gradient-secondary: linear-gradient(135deg, #0f172a 0%, #1e3a5f 100%);
    --gradient-accent: #3B82F6;
    --gradient-hero: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
    --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.05) 0%, rgba(255, 255, 255, 0) 100%);

    --color-text: #1a202c;
    --color-text-secondary: #475569;
    --color-text-light: #64748b;

    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-bg-dark: #f1f5f9;

    --color-border: #e2e8f0;
    --color-border-light: #f0f4f8;

    /* Typography */
    --font-primary: 'Noto Sans KR', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Malgun Gothic', sans-serif;
    --font-display: 'Outfit', 'Noto Sans KR', sans-serif;

    /* Spacing */
    --section-padding: 120px;
    --container-max: 1240px;

    /* Effects */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 15px 50px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 25px 80px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 60px rgba(59, 130, 246, 0.3);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);

    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-full: 9999px;

    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

.section-label {
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: 16px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.section-label::before {
    content: '';
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-accent);
    border-radius: 2px;
}

.section-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.section-title span {
    color: var(--color-accent);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 680px;
    margin: 0 auto 56px;
    line-height: 1.8;
}

.section-cta {
    margin-top: 56px;
    text-align: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 32px;
    font-family: var(--font-primary);
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 40%, rgba(255, 255, 255, 0.2) 50%, transparent 60%);
    transform: translateX(-100%);
    transition: transform 0.6s ease;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn-primary {
    background-color: var(--color-accent);
    color: #fff;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.45);
}

.btn-secondary {
    background-color: #fff;
    color: var(--color-primary);
    border-color: var(--color-border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.btn-secondary:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background-color: #fff;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.15);
}

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

.btn-outline:hover {
    background-color: var(--color-accent);
    color: #fff;
    border-color: transparent;
}

.btn-large {
    padding: 18px 40px;
    font-size: 1rem;
}

.btn svg {
    width: 18px;
    height: 18px;
    transition: transform 0.3s ease;
}

.btn:hover svg {
    transform: translateX(4px);
}

/* ===================================
   Header
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

/* Ensure nav links are readable on dark hero background when at top */
.header:not(.scrolled) .nav-list a {
    color: rgba(255, 255, 255, 0.9);
}

.header:not(.scrolled) .logo {
    color: #fff;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.header.scrolled .nav-list a {
    color: var(--color-text-secondary);
}

.header.scrolled .nav-list a:hover {
    color: var(--color-accent);
}

.header.scrolled .logo {
    color: var(--color-accent);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-accent);
    letter-spacing: -0.02em;
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-list a {
    padding: 10px 18px;
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-full);
    transition: var(--transition-fast);
}

.nav-list a:hover {
    color: var(--color-primary);
    background-color: var(--color-bg-alt);
}

/* Fix hover visibility when header is not scrolled (on dark hero) */
.header:not(.scrolled) .nav-list a:hover {
    color: var(--color-primary);
    background-color: rgba(255, 255, 255, 0.95);
}

.nav-list a.active {
    color: var(--color-accent);
    background-color: rgba(59, 130, 246, 0.08);
}

.nav-cta {
    background-color: var(--color-accent) !important;
    color: #fff !important;
    box-shadow: 0 2px 12px rgba(59, 130, 246, 0.3);
}

.nav-cta:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4) !important;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 26px;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===================================
   Hero Section - Premium Design
   =================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 140px 0 100px;
    background: var(--gradient-hero);
    overflow: hidden;
}

/* Animated Background */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 40% 40%, rgba(59, 130, 246, 0.1) 0%, transparent 40%);
    animation: heroGlow 10s ease-in-out infinite alternate;
}

@keyframes heroGlow {
    0% {
        opacity: 0.6;
        transform: scale(1);
    }

    100% {
        opacity: 1;
        transform: scale(1.1);
    }
}

/* Grid Pattern */
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(59, 130, 246, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 40%, transparent 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.08;
    mix-blend-mode: luminosity;
}

/* Floating Elements */
.hero-decoration {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    animation: float 8s ease-in-out infinite;
}

.hero-decoration-1 {
    width: 400px;
    height: 400px;
    background: rgba(59, 130, 246, 0.2);
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}

.hero-decoration-2 {
    width: 300px;
    height: 300px;
    background: rgba(59, 130, 246, 0.12);
    bottom: 20%;
    left: 5%;
    animation-delay: -3s;
}

.hero-decoration-3 {
    width: 200px;
    height: 200px;
    background: rgba(59, 130, 246, 0.1);
    top: 40%;
    left: 30%;
    animation-delay: -5s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    25% {
        transform: translate(30px, -30px) rotate(5deg);
    }

    50% {
        transform: translate(-20px, 20px) rotate(-5deg);
    }

    75% {
        transform: translate(20px, 30px) rotate(3deg);
    }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-tagline {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 28px;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: clamp(2rem, 4.25vw, 3.25rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 28px;
    line-height: 1.15;
    letter-spacing: -0.03em;
}

.hero-title .highlight {
    color: var(--color-accent-light);
}

.hero-description {
    margin-bottom: 48px;
}

.hero-platform {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 24px;
    background-color: var(--color-accent);
    color: #fff;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 20px;
}

.hero-description p:last-child {
    font-size: 1.0625rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    max-width: 650px;
    margin: 0 auto;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-cta .btn-primary {
    background: #fff;
    color: var(--color-primary);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.3);
}

.hero-cta .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.4);
}

.hero-cta .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
    color: #fff;
}

.hero-cta .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Scroll Indicator */
.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-top: 48px;
    opacity: 1;
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.scroll-indicator.hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(10px);
}

.mouse {
    width: 26px;
    height: 42px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: 15px;
    position: relative;
    display: flex;
    justify-content: center;
}

.wheel {
    width: 4px;
    height: 8px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 2px;
    margin-top: 8px;
    animation: scrollWheel 1.8s ease-in-out infinite;
}

@keyframes scrollWheel {
    0% {
        opacity: 1;
        transform: translateY(0);
    }

    50% {
        opacity: 0.5;
        transform: translateY(12px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

.arrows {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.arrows span {
    display: block;
    width: 10px;
    height: 10px;
    border-right: 2px solid rgba(255, 255, 255, 0.5);
    border-bottom: 2px solid rgba(255, 255, 255, 0.5);
    transform: rotate(45deg);
    animation: arrowBounce 1.5s infinite;
}

.arrows span:nth-child(2) {
    animation-delay: 0.2s;
}

.arrows span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes arrowBounce {

    0%,
    100% {
        opacity: 0.3;
        transform: rotate(45deg) translateY(0);
    }

    50% {
        opacity: 1;
        transform: rotate(45deg) translateY(6px);
    }
}

.scroll-text {
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: rgba(255, 255, 255, 0.6);
    animation: scrollTextPulse 1.8s ease-in-out infinite;
}

@keyframes scrollTextPulse {

    0%,
    100% {
        opacity: 0.6;
    }

    50% {
        opacity: 1;
    }
}

/* ===================================
   Brand Section
   =================================== */
.brand-section {
    padding: var(--section-padding) 0;
    background-color: var(--color-bg);
    text-align: center;
    position: relative;
}

/* Brand Formula - Sharp Angular Design */
.brand-formula {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 32px;
}

.formula-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 140px;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    transition: var(--transition);
}

.formula-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.formula-letter {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 12px;
}

.formula-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.formula-item.globe {
    background: var(--color-bg-alt);
}

.formula-globe {
    width: 40px;
    height: 40px;
    background: var(--color-accent);
    border-radius: 50%;
    margin-bottom: 12px;
    position: relative;
}

.formula-globe::before {
    content: '';
    position: absolute;
    inset: 4px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
}

.formula-operator {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--color-text-light);
}

.formula-result {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 140px;
    padding: 0 32px;
    background: var(--color-accent);
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.35);
}

.formula-result span {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.05em;
}

/* Brand Text Formula (about.html) */
.brand-text-formula {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.formula-k {
    font-weight: 800;
    color: var(--color-accent);
}

.formula-op {
    color: var(--color-text-light);
    font-weight: 300;
}

.formula-highlight {
    background: var(--color-accent);
    color: #fff;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 700;
}

.brand-formula-desc {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.brand-tagline {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 72px;
}

/* Stats - Premium Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1000px;
    margin: 0 auto;
}

.stat-item {
    position: relative;
    padding: 40px 32px;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background-color: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.stat-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-accent);
    margin-bottom: 8px;
    line-height: 1;
}

.stat-unit {
    font-size: 1.5rem;
    font-weight: 600;
}

.stat-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.stat-desc span {
    font-size: 0.8125rem;
    color: var(--color-text-light);
}

/* ===================================
   Innovation Section
   =================================== */
.innovation-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.innovation-section::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.08) 0%, transparent 70%);
    top: -200px;
    right: -200px;
}

.innovation-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-top: 56px;
    text-align: left;
}

.innovation-image {
    position: relative;
}

.innovation-image::before {
    content: '';
    position: absolute;
    inset: -20px;
    background-color: var(--color-accent);
    border-radius: var(--radius-xl);
    opacity: 0.1;
    transform: rotate(-3deg);
}

.innovation-image img {
    max-width: 80%;
    height: auto;
    margin: 0 auto;
    display: block;
    position: relative;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.innovation-text h3 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 24px;
    line-height: 1.3;
}

.innovation-text p {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.innovation-text .btn {
    margin-top: 24px;
}

/* ===================================
   Business Section - Premium Cards
   =================================== */
.business-section {
    padding: var(--section-padding) 0;
    background-color: var(--color-bg);
    text-align: center;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    margin-top: 56px;
}

.business-card {
    position: relative;
    padding: 40px 36px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: left;
    transition: var(--transition);
    overflow: hidden;
}

.business-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-card);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.business-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
    background: linear-gradient(145deg, #fff, #f8fafc);
}

.business-card:hover::before {
    opacity: 1;
}

.business-icon {
    position: relative;
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    transition: var(--transition);
}

/* Hide default SVG icons */
.business-icon svg {
    display: none;
}

/* Creative numbered badge approach */
.business-card {
    counter-increment: business-counter;
}

.business-icon::before {
    content: counter(business-counter, decimal-leading-zero);
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-accent);
    opacity: 0.15;
    position: absolute;
    top: 0;
    left: 0;
}

.business-icon::after {
    content: '';
    position: absolute;
    width: 48px;
    height: 3px;
    background-color: var(--color-accent);
    bottom: 10px;
    left: 0;
    border-radius: 2px;
    transition: width 0.3s ease;
}

.business-card:hover .business-icon::after {
    width: 72px;
}

/* Reset counter on grid */
.business-grid {
    counter-reset: business-counter;
}

/* Theme icons - Abstract geometric marks */
.theme-icon {
    position: relative;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.theme-icon svg {
    display: none;
}

.theme-card {
    counter-increment: theme-counter;
}

.theme-grid {
    counter-reset: theme-counter;
}

/* Decorative line + dot pattern */
.theme-icon::before {
    content: '';
    position: absolute;
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-accent);
    border-radius: 50%;
    opacity: 0.3;
    transition: var(--transition);
}

.theme-icon::after {
    content: '';
    position: absolute;
    width: 12px;
    height: 12px;
    background-color: var(--color-accent);
    border-radius: 50%;
    transition: var(--transition);
}

.theme-card:hover .theme-icon::before {
    transform: scale(1.2);
    opacity: 0.5;
}

.theme-card:hover .theme-icon::after {
    transform: scale(1.3);
}

/* O2O icons - Connecting dots pattern */
.o2o-icon {
    position: relative;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.o2o-icon svg {
    display: none;
}

.o2o-feature {
    counter-increment: o2o-counter;
}

.o2o-features {
    counter-reset: o2o-counter;
}

/* Two connected circles representing O2O */
.o2o-icon::before {
    content: '';
    position: absolute;
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-accent);
    border-radius: 50%;
    left: 8px;
    transition: var(--transition);
}

.o2o-icon::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 24px;
    background-color: var(--color-accent);
    border-radius: 50%;
    right: 8px;
    transition: var(--transition);
}

.o2o-feature:hover .o2o-icon::before {
    transform: translateX(8px);
}

.o2o-feature:hover .o2o-icon::after {
    transform: translateX(-8px);
}

.business-card h3 {
    position: relative;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 18px;
}

.business-card ul {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.business-card li {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    padding-left: 24px;
    position: relative;
    line-height: 1.6;
}

.business-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

/* 3-column variation for business grid */
.business-grid-3col {
    grid-template-columns: repeat(3, 1fr);
}

@media (max-width: 1024px) {
    .business-grid-3col {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .business-grid-3col {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   Theme Section - Premium Grid
   =================================== */
.theme-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    text-align: center;
    position: relative;
}

.theme-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 56px;
}

.theme-card {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(15px) saturate(160%);
    -webkit-backdrop-filter: blur(15px) saturate(160%);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    transition: transform 0.4s cubic-bezier(0.165, 0.84, 0.44, 1), box-shadow 0.4s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    text-align: left;
}

.theme-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.2);
}

.theme-image {
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
}

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

.theme-card:hover .theme-image img {
    transform: scale(1.1);
}

.theme-card-content {
    padding: 32px;
    flex-grow: 1;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
}

.theme-icon {
    width: 48px;
    height: 48px;
    background: rgba(58, 123, 213, 0.15);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    margin-bottom: 24px;
    transition: var(--transition);
}

.theme-card:hover .theme-icon {
    background: var(--color-accent);
    color: #fff;
    transform: rotateY(10deg);
}

.theme-icon svg {
    width: 26px;
    height: 26px;
    stroke: #fff;
}

.theme-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.theme-desc {
    font-size: 0.8125rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 20px;
    padding: 6px 12px;
    background: rgba(59, 130, 246, 0.08);
    border-radius: var(--radius-full);
    display: inline-block;
}

.theme-card ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.theme-card li {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding-left: 18px;
    position: relative;
    line-height: 1.5;
}

.theme-card li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 7px;
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: 50%;
}

/* ===================================
   Comparison Section
   =================================== */
/* ===================================
   Comparison Section (Premium)
   =================================== */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 40px;
    align-items: center;
    margin-top: 64px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.comparison-card {
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    overflow: hidden;
    transition: var(--transition);
}

.comparison-card.legacy {
    border-left: 4px solid var(--color-text-light);
    background: var(--color-bg-alt);
}

.comparison-card.koria {
    border-left: 4px solid var(--color-accent);
    box-shadow: 0 20px 50px rgba(58, 123, 213, 0.15);
    background: linear-gradient(135deg, var(--color-accent) 0%, #2563eb 100%);
}

.card-head {
    padding: 24px;
    font-size: 1.25rem;
    font-weight: 700;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
}

.legacy .card-head {
    color: var(--color-text);
    background: var(--color-bg);
}

.koria .card-head {
    color: #fff;
    border-bottom-color: rgba(255, 255, 255, 0.2);
}

.card-body {
    padding: 40px;
}

.comparison-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.comparison-card li {
    font-size: 1rem;
    color: var(--color-text-secondary);
    position: relative;
    padding-left: 28px;
    text-align: left;
}

.comparison-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-text-light);
}

.koria li::before {
    color: rgba(255, 255, 255, 0.8);
    content: '✓';
}

.koria li {
    color: #fff;
    font-weight: 500;
}

.comparison-vs-badge {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent) 0%, #2563eb 100%);
    border: 3px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.5rem;
    color: #fff;
    z-index: 2;
    box-shadow: 0 10px 40px rgba(59, 130, 246, 0.4);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

@media (max-width: 900px) {
    .comparison-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .comparison-vs-badge {
        margin: -40px auto;
        order: 2;
    }

    .legacy {
        order: 1;
    }

    .koria {
        order: 3;
    }
}

/* ===================================
   O2O Section
   =================================== */
.o2o-section {
    padding: var(--section-padding) 0;
    background-color: var(--color-bg);
    text-align: center;
}

.o2o-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-top: 56px;
}

.o2o-image-container {
    width: 100%;
}

.o2o-slider {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-xl);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.o2o-slides {
    position: relative;
    width: 100%;
    aspect-ratio: 16/10;
}

.o2o-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    transform: scale(1.1);
    visibility: hidden;
}

.o2o-slide.active {
    opacity: 1;
    transform: scale(1);
    visibility: visible;
}

.o2o-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.o2o-slider-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 10;
}

.o2o-dot {
    width: 30px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 2px;
    cursor: pointer;
    transition: var(--transition);
}

.o2o-dot.active {
    background: #fff;
    width: 50px;
}

.o2o-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.o2o-feature {
    cursor: pointer;
    transition: all 0.4s ease;
    border: 1px solid transparent;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    text-align: left;
    padding: 24px;
    /* Changed from 28px */
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.o2o-feature:hover,
.o2o-feature.active {
    border-color: var(--color-accent);
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.o2o-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    flex-shrink: 0;
    position: relative;
    /* Background removed - using connecting circles pattern */
}

.o2o-icon svg {
    display: none;
}

.o2o-feature h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.o2o-feature p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===================================
   Roadmap Preview Section
   =================================== */
.roadmap-preview {
    padding: var(--section-padding) 0;
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.roadmap-preview::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 70%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
}

.roadmap-preview .section-label {
    color: var(--color-accent-light);
}

.roadmap-preview .section-title {
    color: #fff;
}

.roadmap-preview .section-subtitle {
    color: rgba(255, 255, 255, 0.7);
}

/* Content Section Alt-BG - Dark Theme Styling */
.content-section.alt-bg .section-title {
    color: var(--color-primary);
}

.content-section.alt-bg .section-subtitle {
    color: var(--color-text-secondary);
}

.roadmap-image {
    position: relative;
    margin: 56px auto;
    max-width: 900px;
}

.roadmap-image::before {
    content: '';
    position: absolute;
    inset: -30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
}

.roadmap-image img {
    position: relative;
    border-radius: var(--radius-xl);
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
}

.roadmap-summary {
    position: relative;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto;
}

.roadmap-phase-preview {
    padding: 36px 28px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.roadmap-phase-preview:hover {
    border-color: var(--color-accent);
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.phase-number {
    display: inline-block;
    font-family: var(--font-display);
    font-size: 0.8125rem;
    font-weight: 700;
    color: #fff;
    background: var(--color-accent);
    padding: 6px 16px;
    border-radius: var(--radius-full);
    margin-bottom: 16px;
}

.roadmap-phase-preview h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 10px;
}

.roadmap-phase-preview p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

/* Phase list styles */
.phase-list {
    text-align: left;
    margin-top: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.phase-list li {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    padding-left: 16px;
    position: relative;
}

/* Dark theme roadmap phase list - only for roadmap-preview section */
.roadmap-preview .phase-list li {
    color: rgba(255, 255, 255, 0.7);
}

@media (max-width: 768px) {
    .phase-list {
        text-align: center;
        padding-left: 0;
    }

    .phase-list li {
        padding-left: 0;
    }
}

.roadmap-preview .section-cta .btn-primary {
    background: #fff;
    color: var(--color-primary);
}

.roadmap-preview .section-cta .btn-primary:hover {
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.3);
}

/* ===================================
   FAQ Section
   =================================== */
.faq-section {
    padding: var(--section-padding) 0;
    background-color: var(--color-bg-alt);
    text-align: center;
}

.faq-list {
    max-width: 800px;
    margin: 56px auto 0;
    text-align: left;
}

.faq-item {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--color-accent);
}

.faq-item.active {
    box-shadow: var(--shadow-md);
    border-color: var(--color-accent);
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 24px 28px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
}

.faq-question span {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--color-text);
    padding-right: 20px;
}

.faq-question svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-text-light);
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.active .faq-question svg {
    transform: rotate(45deg);
    stroke: var(--color-accent);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 28px 24px;
    font-size: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ===================================
   CTA Section
   =================================== */
.cta-section {
    padding: 100px 0;
    background: var(--gradient-primary);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 50%);
}

.cta-title {
    position: relative;
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 20px;
}

.cta-desc {
    position: relative;
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    position: relative;
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-section .btn-primary {
    background: #fff;
    color: var(--color-primary);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.cta-section .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

.cta-section .btn-secondary {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.4);
}

.cta-section .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
}

/* ===================================
   Footer - Premium Design
   =================================== */
.footer {
    padding: 80px 0 40px;
    background: var(--gradient-secondary);
    color: #fff;
}

.footer-top {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 80px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    margin-bottom: 20px;
}

.footer-desc {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
}

.footer-nav {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
}

.footer-nav-group h3 {
    font-size: 0.8125rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.4);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 20px;
}

.footer-nav-group ul {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-nav-group li,
.footer-nav-group a {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.5;
    transition: var(--transition-fast);
}

.footer-nav-group a:hover {
    color: #fff;
    transform: translateX(4px);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 32px;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 20px;
}

.footer-links a {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.5);
}

.footer-links a:hover {
    color: #fff;
}

.footer-links span {
    color: rgba(255, 255, 255, 0.2);
}

.footer-copyright {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ===================================
   Page Header (Subpages) - Premium
   =================================== */
.page-header {
    padding: 160px 0 80px;
    background: var(--gradient-hero);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 70%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 30%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
}

.page-header h1 {
    position: relative;
    font-size: clamp(1.9rem, 4.25vw, 3rem);
    font-weight: 800;
    color: #fff;
    margin-bottom: 20px;
}

.page-header p {
    position: relative;
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.75);
    max-width: 600px;
    margin: 0 auto;
}

.breadcrumb {
    position: relative;
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 28px;
    font-size: 0.875rem;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.5);
}

.breadcrumb a:hover {
    color: #fff;
}

.breadcrumb span {
    color: rgba(255, 255, 255, 0.3);
}

.breadcrumb .current {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

/* ===================================
   Content Sections
   =================================== */
.content-section {
    padding: var(--section-padding) 0;
}

.content-section.alt-bg {
    background: linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.content-grid.reverse {
    direction: rtl;
}

.content-grid.reverse>* {
    direction: ltr;
}

.content-image {
    position: relative;
}

.content-image::before {
    content: '';
    position: absolute;
    inset: -20px;
    background: var(--gradient-primary);
    border-radius: var(--radius-xl);
    opacity: 0.1;
    transform: rotate(-3deg);
}

.content-image img {
    position: relative;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.content-text h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.content-text p {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.8;
}

.content-text ul {
    margin-top: 28px;
}

.content-text li {
    font-size: 1rem;
    color: var(--color-text-secondary);
    padding-left: 28px;
    position: relative;
    margin-bottom: 14px;
}

.content-text li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 10px;
    height: 10px;
    background: var(--gradient-primary);
    border-radius: 50%;
}

/* ===================================
   Contact Form - Premium
   =================================== */
.contact-form-section {
    padding: var(--section-padding) 0;
    background-color: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 80px;
    align-items: stretch;
}

.contact-info h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.contact-info>p {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    line-height: 1.8;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 28px;
}

.contact-detail {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 24px;
    background: var(--color-bg-alt);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.contact-detail:hover {
    border-color: var(--color-accent);
    transform: translateX(8px);
}

.contact-detail-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.25);
}

.contact-detail-icon svg {
    width: 26px;
    height: 26px;
    stroke: #fff;
}

.contact-detail h3 {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 6px;
}

.contact-detail p,
.contact-detail a {
    font-size: 1.0625rem;
    color: var(--color-text);
    font-weight: 500;
}

.contact-detail a:hover {
    color: var(--color-accent);
}

.contact-form {
    background: linear-gradient(145deg, var(--color-bg-alt), var(--color-bg));
    padding: 48px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.form-group {
    margin-bottom: 28px;
}

.form-group label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 10px;
}

.form-group label .required {
    color: #ef4444;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-text);
    background-color: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    min-height: 140px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

/* ===================================
   Responsive
   =================================== */
@media (max-width: 1024px) {
    .stats-grid {
        gap: 24px;
    }

    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .theme-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }

    .nav {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        padding: 32px 24px;
        z-index: 999;
    }

    .nav.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        gap: 8px;
    }

    .nav-list a {
        display: block;
        padding: 16px 20px;
        font-size: 1.0625rem;
        border-radius: var(--radius-md);
    }

    .mobile-menu-btn {
        display: flex;
    }

    .hero {
        min-height: auto;
        padding: 140px 0 80px;
    }

    .hero-title {
        font-size: 1.9rem;
    }

    .hero-cta {
        flex-direction: column;
        gap: 12px;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .brand-meaning {
        gap: 16px;
    }

    .brand-letter {
        font-size: 2rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }

    .innovation-content,
    .o2o-content,
    .content-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .content-grid.reverse {
        direction: ltr;
    }

    .business-grid,
    .theme-grid {
        grid-template-columns: 1fr;
    }

    .roadmap-summary {
        grid-template-columns: 1fr;
        max-width: 400px;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .cta-section .btn {
        width: 100%;
    }

    .footer-nav {
        grid-template-columns: 1fr;
        gap: 36px;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 32px 24px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 20px;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .brand-meaning {
        flex-direction: column;
    }

    .brand-item {
        width: 100%;
        max-width: 200px;
    }

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

/* Animation classes */
.animate-in {
    opacity: 1 !important;
    transform: translateY(0) translateX(0) !important;
}

/* Scroll to Top Button */
.scroll-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-accent);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 1000;
}

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

.scroll-to-top:hover {
    background: var(--color-accent-dark);
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(59, 130, 246, 0.5);
}

.scroll-to-top svg {
    width: 24px;
    height: 24px;
    color: #fff;
}

@media (max-width: 768px) {
    .scroll-to-top {
        bottom: 24px;
        right: 24px;
        width: 48px;
        height: 48px;
    }

    .scroll-to-top svg {
        width: 20px;
        height: 20px;
    }
}