/* ==========================================================================
   AnKEY Official Website - Shared Styles
   Version: 3.0 (Refactored)
   ========================================================================== */

/* ==========================================================================
   1. CSS Variables
   ========================================================================== */
:root {
    --coral: #D96B60;
    --coral-light: #E8A099;
    --teal: #1B7B8C;
    --teal-dark: #145A66;
    --teal-light: #2D9BAD;
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-600: #4B5563;
    --gray-800: #1F2937;

    /* Spacing & Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Gradient variables */
    --gradient-teal: linear-gradient(135deg, var(--teal) 0%, var(--teal-dark) 100%);
    --gradient-coral: linear-gradient(135deg, var(--coral) 0%, var(--coral-light) 100%);
    --gradient-hero: linear-gradient(135deg, #0f4c5c 0%, var(--teal) 50%, var(--teal-light) 100%);
    --gradient-section-alt: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

/* ==========================================================================
   2. Reset & Base
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Open Sans', 'Noto Sans TC', "Microsoft JhengHei", sans-serif;
    line-height: 1.7;
    color: var(--gray-800);
    background-color: var(--gray-50);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Poppins', 'Noto Sans TC', "Microsoft JhengHei", sans-serif;
}

/* ==========================================================================
   3. Animations
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.animate-on-scroll.delay-1 { transition-delay: 0.1s; }
.animate-on-scroll.delay-2 { transition-delay: 0.2s; }
.animate-on-scroll.delay-3 { transition-delay: 0.3s; }
.animate-on-scroll.delay-4 { transition-delay: 0.4s; }
.animate-on-scroll.delay-5 { transition-delay: 0.5s; }

@media (prefers-reduced-motion: reduce) {
    .animate-on-scroll {
        opacity: 1;
        transform: none;
        transition: none;
        animation: none;
    }
    .animate-on-scroll.is-visible {
        opacity: 1;
        transform: none;
    }
}

/* ==========================================================================
   4. Layout Components - Header
   ========================================================================== */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.logo-bar {
    width: 4px;
    height: 36px;
    background: var(--coral);
    border-radius: 2px;
}

.logo-text {
    font-family: 'Poppins', 'Noto Sans TC', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--teal);
    letter-spacing: -0.5px;
}

.logo-text span {
    text-decoration: underline;
    text-decoration-thickness: 2px;
    text-underline-offset: 4px;
}

.nav ul {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav a {
    color: var(--gray-600);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav a:hover {
    color: var(--teal);
}

/* Dark Mode Toggle */
.theme-toggle {
    background: none;
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--gray-600);
    transition: all 0.2s;
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--teal);
    color: var(--teal);
    background: var(--gray-50);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

.theme-toggle .icon-moon,
[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

.theme-toggle .icon-sun,
[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

/* ==========================================================================
   4. Layout Components - Footer
   ========================================================================== */
.footer {
    background: #1F2937;
    color: #fff;
    padding: 0;
    margin-top: 2rem;
}

.footer-main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem 2rem;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
}

.footer-brand p {
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
    margin-top: 1rem;
    line-height: 1.6;
}

.footer-nav h4,
.footer-social h4 {
    font-family: 'Poppins', 'Noto Sans TC', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #fff;
}

.footer-nav ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-nav a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.2s;
}

.footer-nav a:hover {
    color: var(--coral-light);
}

.footer-social-links {
    display: flex;
    gap: 0.75rem;
}

.footer-social-link {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.2s;
}

.footer-social-link:hover {
    background: var(--coral);
    transform: translateY(-2px);
}

.footer-social-link svg {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 1.5rem 2rem;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    max-width: 1200px;
    margin: 0 auto;
}

/* Legacy footer (for sub-pages that haven't updated yet) */
.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-logo .logo-bar {
    background: var(--coral);
}

.footer-logo .logo-text {
    color: #fff;
}

.footer-info {
    text-align: right;
}

.footer-info p {
    font-size: 0.9rem;
    opacity: 0.9;
}

.footer-info .copyright {
    opacity: 0.7;
    margin-top: 0.5rem;
    font-size: 0.85rem;
}

/* ==========================================================================
   5. Shared Components - Hero Section
   ========================================================================== */
.hero {
    padding: 8rem 2rem 4rem;
    background: var(--gradient-hero);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 8px;
    height: 100%;
    background: var(--coral);
}

.hero-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1rem;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    max-width: 600px;
}

/* Back Link (for detail pages) */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.9rem;
    margin-bottom: 2rem;
    transition: color 0.2s;
}

.back-link:hover {
    color: #fff;
}

/* Tags */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    background: rgba(255,255,255,0.15);
    color: #fff;
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    backdrop-filter: blur(4px);
}

/* ==========================================================================
   5. Shared Components - Container
   ========================================================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* ==========================================================================
   5. Shared Components - Section
   ========================================================================== */
.section {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    margin-bottom: 2rem;
    border: 1px solid var(--gray-200);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--teal);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 3px solid var(--coral);
    display: inline-block;
}

.section h3 {
    font-size: 1.25rem;
    color: var(--teal-dark);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.section h3:first-of-type {
    margin-top: 0;
}

.section p {
    color: var(--gray-600);
    margin-bottom: 1rem;
}

.section ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.section li {
    color: var(--gray-600);
    margin-bottom: 0.5rem;
}

.section li strong {
    color: var(--teal-dark);
}

/* ==========================================================================
   5. Shared Components - Highlight Box
   ========================================================================== */
.highlight-box {
    background: var(--gray-50);
    border-left: 4px solid var(--coral);
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
}

.highlight-box strong {
    color: var(--teal-dark);
}

.highlight {
    background-color: #FEF3C7;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-weight: 600;
    color: var(--teal-dark);
}

/* ==========================================================================
   5. Shared Components - Stats Grid
   ========================================================================== */
.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-card {
    text-align: center;
    padding: 2rem 1.5rem;
    background: linear-gradient(135deg, #1B7B8C 0%, #145A66 100%);
    color: #fff;
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--coral);
}

.stat-number {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* ==========================================================================
   5. Shared Components - Card Accent (shared base for feature/arch/defect cards)
   ========================================================================== */
.feature-card,
.arch-card,
.defect-type {
    background: var(--gray-50);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--coral);
    transition: all 0.3s;
}

/* ==========================================================================
   5. Shared Components - Feature Grid
   ========================================================================== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.feature-card h4 {
    color: var(--teal-dark);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.feature-card p {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin-bottom: 0;
}

.feature-card ul {
    margin-left: 1rem;
    margin-top: 0.5rem;
}

.feature-card li {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

/* ==========================================================================
   5. Shared Components - Architecture Grid
   ========================================================================== */
.architecture-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.arch-card h4 {
    color: var(--teal-dark);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.arch-card ul {
    margin-left: 1rem;
}

.arch-card li {
    color: var(--gray-600);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.arch-card li strong {
    color: var(--teal-dark);
}

/* ==========================================================================
   5. Shared Components - Defect Grid (AOI specific)
   ========================================================================== */
.defect-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.defect-type {
    padding: 1.25rem;
    border-radius: var(--radius-md);
    border-left-color: var(--coral-light);
}

.defect-type:hover {
    border-left-color: var(--coral);
    background: var(--white);
    box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.defect-type strong {
    color: var(--teal-dark);
    display: block;
    margin-bottom: 0.5rem;
}

.defect-type p {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin: 0;
}

/* ==========================================================================
   5. Shared Components - Workflow
   ========================================================================== */
.workflow {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
    align-items: stretch;
}

.workflow-step {
    flex: 1;
    min-width: 120px;
    background: var(--gray-50);
    padding: 1.25rem 1rem;
    border-radius: var(--radius-lg);
    text-align: center;
    position: relative;
    border: 1px solid var(--gray-200);
    transition: all 0.3s;
}

.workflow-step:hover {
    border-color: var(--teal);
    background: var(--white);
}

.workflow-step::after {
    content: "\2192";
    position: absolute;
    right: -0.75rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    color: var(--coral);
    font-weight: bold;
    z-index: 1;
}

.workflow-step:last-child::after {
    content: "";
}

.workflow-step strong {
    display: block;
    color: var(--teal-dark);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.workflow-step p {
    color: var(--gray-600);
    font-size: 0.8rem;
    margin: 0;
}

/* ==========================================================================
   5. Shared Components - Tech Stack
   ========================================================================== */
.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1rem;
}

.tech-item {
    background: var(--teal);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.tech-item:hover {
    background: var(--teal-dark);
    transform: translateY(-2px);
}

/* ==========================================================================
   5. Shared Components - Tables
   ========================================================================== */
.comparison-table,
.performance-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.comparison-table th,
.comparison-table td,
.performance-table th,
.performance-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.comparison-table th,
.performance-table th {
    background: var(--teal);
    color: var(--white);
    font-weight: 600;
}

.comparison-table tr:nth-child(even),
.performance-table tr:nth-child(even) {
    background-color: var(--gray-50);
}

.comparison-table tr:hover,
.performance-table tr:hover {
    background-color: var(--gray-100);
}

.comparison-table td,
.performance-table td {
    color: var(--gray-600);
}

.comparison-table td strong,
.performance-table td strong {
    color: var(--teal-dark);
}

.comparison-table tr.highlight-row {
    background-color: #ECFDF5;
}

.comparison-table tr.highlight-row:hover {
    background-color: #D1FAE5;
}

/* ==========================================================================
   6. Index Page Specific Styles (scoped with .page-index)
   ========================================================================== */

.page-index {
    background-color: var(--white);
}

/* Navigation hover effect */
.page-index .nav a {
    position: relative;
}

.page-index .nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--coral);
    transition: width 0.2s;
}

.page-index .nav a:hover::after {
    width: 100%;
}

/* Hero Section - Index specific (only differences from shared .hero) */
.page-index .hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.page-index .hero::before {
    z-index: 2;
}

/* Decorative background shapes (index-only) */
.page-index .hero::after {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(217, 107, 96, 0.15) 0%, transparent 70%);
    z-index: 0;
}

.page-index .hero-decoration {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
}

.page-index .hero-decoration .shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.08;
    background: var(--white);
}

.page-index .hero-decoration .shape-1 {
    width: 400px;
    height: 400px;
    bottom: -15%;
    left: 40%;
}

.page-index .hero-decoration .shape-2 {
    width: 200px;
    height: 200px;
    top: 15%;
    right: 20%;
    opacity: 0.05;
}

.page-index .hero-decoration .shape-3 {
    width: 120px;
    height: 120px;
    top: 60%;
    right: 8%;
    border-radius: 30%;
    opacity: 0.06;
    transform: rotate(45deg);
}

.page-index .hero-decoration .line {
    position: absolute;
    background: rgba(255,255,255,0.06);
}

.page-index .hero-decoration .line-1 {
    width: 1px;
    height: 300px;
    top: 10%;
    right: 30%;
    transform: rotate(15deg);
}

.page-index .hero-decoration .line-2 {
    width: 1px;
    height: 200px;
    bottom: 10%;
    right: 25%;
    transform: rotate(-20deg);
}

.page-index .hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.page-index .hero-content h1 {
    font-size: 3.5rem;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.page-index .hero-content h1 .highlight {
    background: none;
    padding: 0;
    color: var(--coral-light);
    font-weight: 700;
}

.page-index .hero-content p {
    font-size: 1.25rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 2rem;
    max-width: 480px;
}

.page-index .hero-cta {
    display: flex;
    gap: 1rem;
}

.page-index .btn {
    padding: 0.875rem 2rem;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.page-index .btn-primary {
    background: var(--coral);
    color: #fff;
}

.page-index .btn-primary:hover {
    background: #c25a50;
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(217, 107, 96, 0.4);
}

.page-index .btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.5);
}

.page-index .btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--white);
}

.page-index .hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Hero feature badges */
.page-index .hero-badges {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    max-width: 360px;
}

.page-index .hero-badge {
    background: rgba(255,255,255,0.1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: all 0.3s;
}

.page-index .hero-badge:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-2px);
}

.page-index .hero-badge-icon {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.15);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    flex-shrink: 0;
}

.page-index .hero-badge-icon svg {
    width: 20px;
    height: 20px;
}

.page-index .hero-badge span {
    font-size: 0.9rem;
    color: #fff;
    font-weight: 500;
}

/* Section Common - Index specific */
.page-index .section {
    padding: 6rem 2rem;
    position: relative;
    background: transparent;
    border: none;
    box-shadow: none;
    border-radius: 0;
    margin-bottom: 0;
}

.page-index .section-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.page-index .section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.page-index .section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--teal);
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
    border-bottom: none;
    padding-bottom: 0;
}

.page-index .section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--coral);
    border-radius: 2px;
}

.page-index .section-subtitle {
    font-size: 1.1rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* About Section */
.page-index .about {
    background: var(--gradient-section-alt);
}

.page-index .about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.page-index .about-text h3 {
    font-size: 1.75rem;
    color: var(--teal);
    margin-bottom: 1rem;
}

.page-index .about-text p {
    color: var(--gray-600);
    margin-bottom: 1.5rem;
}

.page-index .about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.page-index .stat-item {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border-left: 4px solid var(--coral);
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: all 0.3s;
}

.page-index .stat-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

.page-index .stat-item .stat-number {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--teal);
}

.page-index .stat-item .stat-label {
    font-size: 0.9rem;
    color: var(--gray-600);
    margin-top: 0.25rem;
}

/* Services Section */
.page-index .services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.page-index .service-card {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.page-index .service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--teal), var(--coral));
    transform: scaleX(0);
    transition: transform 0.3s;
}

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

.page-index .service-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 16px 32px rgba(0,0,0,0.08);
    border-color: transparent;
}

.page-index .service-icon {
    width: 56px;
    height: 56px;
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    transition: all 0.3s;
    color: var(--teal);
}

.page-index .service-icon svg {
    width: 28px;
    height: 28px;
}

.page-index .service-card:hover .service-icon {
    background: var(--teal);
    color: var(--white);
}

.page-index .service-card h3 {
    font-size: 1.25rem;
    color: var(--teal-dark);
    margin-bottom: 1rem;
}

.page-index .service-card p {
    color: var(--gray-600);
    font-size: 0.95rem;
}

/* Portfolio Section */
.page-index .portfolio {
    background: var(--gradient-section-alt);
}

.page-index .portfolio-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.page-index .portfolio-item {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: all 0.3s;
    border: 1px solid var(--gray-200);
}

.page-index .portfolio-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0,0,0,0.08);
    border-color: transparent;
}

.page-index .portfolio-color-bar {
    height: 6px;
    background: linear-gradient(90deg, var(--teal), var(--teal-light));
}

.page-index .portfolio-item:nth-child(2n) .portfolio-color-bar {
    background: linear-gradient(90deg, var(--coral), var(--coral-light));
}

.page-index .portfolio-item:nth-child(3n) .portfolio-color-bar {
    background: linear-gradient(90deg, var(--teal-dark), var(--teal));
}

.page-index .portfolio-content {
    padding: 2rem;
}

.page-index .portfolio-tag {
    display: inline-block;
    background: var(--teal);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.page-index .portfolio-content h3 {
    font-size: 1.25rem;
    color: var(--teal-dark);
    margin-bottom: 0.75rem;
}

.page-index .portfolio-content p {
    color: var(--gray-600);
    font-size: 0.9rem;
    margin-bottom: 1.25rem;
    line-height: 1.6;
}

.page-index .portfolio-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.page-index .portfolio-link {
    font-size: 0.9rem;
    color: var(--teal);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: color 0.2s;
}

.page-index .portfolio-link:hover {
    color: var(--coral);
}

.page-index .portfolio-link::after {
    content: '\2192';
}

/* Contact Section */
.page-index .contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 4rem;
}

.page-index .contact-info h3 {
    font-size: 1.75rem;
    color: var(--teal);
    margin-bottom: 1rem;
}

.page-index .contact-info p {
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.page-index .contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.page-index .contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.page-index .contact-icon {
    width: 44px;
    height: 44px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--teal);
}

.page-index .contact-icon svg {
    width: 20px;
    height: 20px;
}

.page-index .contact-item-text {
    display: flex;
    flex-direction: column;
}

.page-index .contact-label {
    font-size: 0.8rem;
    color: var(--gray-600);
}

.page-index .contact-value {
    font-weight: 500;
    color: var(--teal-dark);
}

.page-index .contact-form {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
    border: 1px solid var(--gray-200);
}

.page-index .form-group {
    margin-bottom: 1.5rem;
}

.page-index .form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--gray-800);
    font-size: 0.9rem;
}

.page-index .form-group input,
.page-index .form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--gray-300);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s;
    background: var(--gray-50);
}

.page-index .form-group input:focus,
.page-index .form-group textarea:focus {
    outline: none;
    border-color: var(--teal);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(27, 123, 140, 0.1);
}

.page-index .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.page-index .submit-btn {
    width: 100%;
    padding: 1rem;
    background: var(--teal);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.page-index .submit-btn:hover {
    background: var(--teal-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(27, 123, 140, 0.3);
}

/* ==========================================================================
   7. Responsive Design (all media queries consolidated)
   ========================================================================== */

/* --- 1024px breakpoint --- */
@media (max-width: 1024px) {
    /* Shared */
    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .comparison-table,
    .performance-table {
        font-size: 0.85rem;
    }

    .comparison-table th,
    .comparison-table td,
    .performance-table th,
    .performance-table td {
        padding: 0.75rem 0.5rem;
    }

    .footer-main {
        grid-template-columns: 1fr 1fr;
    }

    /* Index specific */
    .page-index .hero-inner,
    .page-index .about-content,
    .page-index .contact-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .page-index .hero-content h1 {
        font-size: 2.75rem;
    }

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

    .page-index .hero-badges {
        max-width: 100%;
        grid-template-columns: repeat(3, 1fr);
    }
}

/* --- 768px breakpoint --- */
@media (max-width: 768px) {
    /* Shared */
    .header {
        padding: 1rem;
    }

    .header-inner {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .logo {
        width: 100%;
    }

    .nav {
        flex: 1;
    }

    .nav ul {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding: 11rem 1.5rem 3rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .container {
        padding: 2rem 1.5rem;
    }

    .section {
        padding: 1.5rem;
    }

    .stats {
        grid-template-columns: 1fr;
    }

    .stat-number {
        font-size: 2rem;
    }

    .workflow {
        flex-direction: column;
    }

    .workflow-step::after {
        content: "\2193";
        right: auto;
        top: auto;
        bottom: -0.75rem;
        left: 50%;
        transform: translateX(-50%);
    }

    .comparison-table,
    .performance-table {
        display: block;
        overflow-x: auto;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 2rem 1.5rem;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .footer-info {
        text-align: center;
    }

    /* Index specific */
    .page-index .hero {
        min-height: auto;
        padding: 9rem 1.5rem 3rem;
    }

    .page-index .hero-content h1 {
        font-size: 2rem;
    }

    .page-index .hero-cta {
        flex-direction: column;
    }

    .page-index .hero-badges {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .page-index .hero-badge {
        padding: 1rem;
    }

    .page-index .section {
        padding: 4rem 1.5rem;
    }

    .page-index .section-title {
        font-size: 2rem;
    }

    .page-index .services-grid,
    .page-index .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .page-index .about-stats {
        grid-template-columns: 1fr;
    }

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

/* ==========================================================================
   7b. Partners Section
   ========================================================================== */
.page-index #partners {
    background: var(--gradient-section-alt);
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 1rem;
}

.partner-item {
    text-align: center;
    padding: 2rem 1.5rem;
    border-radius: var(--radius-lg);
    background: var(--white);
    border: 1px solid var(--gray-200);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
    cursor: default;
}

.partner-item::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--teal), var(--coral));
    transform: scaleX(0);
    transition: transform 0.3s;
}

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

.partner-item:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.08);
    border-color: transparent;
}

.partner-logo {
    height: 48px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.5;
    transition: all 0.3s;
    margin-bottom: 0.8rem;
}

.partner-logo-wide {
    height: 36px;
}

.partner-item:hover .partner-logo {
    filter: grayscale(0%);
    opacity: 1;
}

.partner-logo-text {
    font-family: 'Poppins', 'Noto Sans TC', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--gray-800);
    opacity: 0.45;
    transition: all 0.3s;
    margin-bottom: 0.8rem;
    line-height: 48px;
}

.partner-item:hover .partner-logo-text {
    opacity: 1;
    color: var(--teal);
}

.partner-name {
    display: block;
    font-family: 'Poppins', 'Noto Sans TC', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--gray-800);
    transition: all 0.3s;
}

.partner-item:hover .partner-name {
    color: var(--teal);
}

.partner-desc {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.82rem;
    color: var(--gray-600);
    opacity: 0.6;
    transition: all 0.3s;
}

.partner-item:hover .partner-desc {
    opacity: 1;
}

@media (max-width: 768px) {
    .partners-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .partners-grid {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   7c. Tech Stack Section
   ========================================================================== */
.techstack-groups {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 1rem;
}

.techstack-group {
    padding: 1.8rem 2rem;
    border-radius: var(--radius-lg);
    background: var(--white);
    border: 1px solid var(--gray-200);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
    transition: all 0.3s;
    position: relative;
    overflow: hidden;
}

.techstack-group::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    width: 3px;
    background: var(--teal);
    opacity: 0;
    transition: opacity 0.3s;
}

.techstack-group:hover::before {
    opacity: 1;
}

.techstack-group:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: transparent;
}

.techstack-label {
    font-family: 'Poppins', 'Noto Sans TC', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--teal);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.techstack-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--gray-200);
}

.techstack-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.ts-tag {
    display: inline-block;
    padding: 5px 14px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    background: var(--gray-100);
    color: var(--gray-600);
    border: 1px solid var(--gray-200);
    transition: all 0.2s;
    cursor: default;
}

.ts-tag:hover {
    border-color: var(--teal);
    color: var(--teal);
    background: rgba(27, 123, 140, 0.06);
}

.ts-tag.ts-primary {
    background: linear-gradient(135deg, var(--teal), var(--teal-dark));
    color: #fff;
    border-color: transparent;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(27, 123, 140, 0.25);
}

.ts-tag.ts-primary:hover {
    box-shadow: 0 4px 12px rgba(27, 123, 140, 0.35);
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    .techstack-groups {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   8. Dark Mode (all dark mode rules consolidated)
   ========================================================================== */

/* --- Dark Mode - Shared --- */
[data-theme="dark"] {
    --white: #1a1a2e;
    --gray-50: #16213e;
    --gray-100: #1a1a2e;
    --gray-200: #2a2a4a;
    --gray-300: #3a3a5a;
    --gray-600: #b0b0c8;
    --gray-800: #e8e8f0;
    --teal: #2bb5cc;
    --teal-dark: #1e8fa3;
    --teal-light: #45d0e8;
    --coral: #e07a70;
    --coral-light: #f0a098;
    --gradient-hero: linear-gradient(135deg, #0a0f1e 0%, #0f2027 50%, #1a3a4a 100%);
    --gradient-section-alt: linear-gradient(180deg, #16213e 0%, #1a1a2e 100%);
    --gradient-teal: linear-gradient(135deg, var(--teal) 0%, var(--teal-dark) 100%);
}

[data-theme="dark"] body {
    background-color: #0f0f23;
}

[data-theme="dark"] .header {
    background: rgba(26, 26, 46, 0.95);
    box-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

[data-theme="dark"] .theme-toggle {
    border-color: var(--gray-300);
    color: var(--gray-600);
}

[data-theme="dark"] .theme-toggle:hover {
    border-color: var(--coral);
    color: var(--coral);
}

[data-theme="dark"] .section {
    border-color: var(--gray-200);
}

[data-theme="dark"] .partner-item {
    background: var(--gray-50);
    border-color: var(--gray-200);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .partner-item:hover {
    border-color: transparent;
    box-shadow: 0 12px 28px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .partner-logo {
    filter: grayscale(100%) brightness(1.8);
    opacity: 0.4;
}

[data-theme="dark"] .partner-item:hover .partner-logo {
    filter: grayscale(0%) brightness(1);
    opacity: 1;
}

[data-theme="dark"] .partner-logo-text {
    color: var(--gray-600);
}

[data-theme="dark"] .partner-item:hover .partner-logo-text {
    color: var(--teal);
}

[data-theme="dark"] .partner-name {
    color: var(--gray-600);
}

[data-theme="dark"] .partner-item:hover .partner-name {
    color: var(--teal);
}

[data-theme="dark"] .techstack-group {
    background: var(--gray-50);
    border-color: var(--gray-200);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .techstack-group:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    border-color: transparent;
}

[data-theme="dark"] .techstack-label::after {
    background: var(--gray-300);
}

[data-theme="dark"] .ts-tag {
    background: var(--gray-200);
    color: var(--gray-600);
    border-color: var(--gray-300);
}

[data-theme="dark"] .ts-tag:hover {
    background: rgba(43, 181, 204, 0.1);
    border-color: var(--teal);
    color: var(--teal);
}

[data-theme="dark"] .ts-tag.ts-primary {
    background: linear-gradient(135deg, var(--teal), var(--teal-dark));
    color: #0f0f23;
    border-color: transparent;
    box-shadow: 0 2px 6px rgba(43, 181, 204, 0.3);
}

[data-theme="dark"] .ts-tag.ts-primary:hover {
    box-shadow: 0 4px 12px rgba(43, 181, 204, 0.4);
}

[data-theme="dark"] .stat-card {
    background: linear-gradient(135deg, #1e3a4a 0%, #0f2027 100%);
}

[data-theme="dark"] .feature-card,
[data-theme="dark"] .arch-card {
    background: var(--gray-50);
}

[data-theme="dark"] .highlight-box {
    background: var(--gray-50);
}

[data-theme="dark"] .comparison-table th,
[data-theme="dark"] .performance-table th {
    background: var(--teal-dark);
}

[data-theme="dark"] .comparison-table tr:hover,
[data-theme="dark"] .performance-table tr:hover {
    background-color: var(--gray-200);
}

[data-theme="dark"] .comparison-table tr.highlight-row {
    background-color: rgba(43, 181, 204, 0.1);
}

[data-theme="dark"] .comparison-table tr.highlight-row:hover {
    background-color: rgba(43, 181, 204, 0.15);
}

[data-theme="dark"] .workflow-step {
    background: var(--gray-50);
    border-color: var(--gray-200);
}

[data-theme="dark"] .workflow-step:hover {
    background: var(--gray-100);
}

[data-theme="dark"] .defect-type {
    background: var(--gray-50);
}

[data-theme="dark"] .defect-type:hover {
    background: var(--gray-100);
}

[data-theme="dark"] .footer {
    background: #0a0a1a;
    color: #fff;
}

[data-theme="dark"] .footer-bottom {
    border-top-color: rgba(255,255,255,0.05);
}

[data-theme="dark"] img {
    opacity: 0.9;
}

/* --- Dark Mode - Index Page --- */
[data-theme="dark"] .page-index {
    background-color: #0f0f23;
}

[data-theme="dark"] .page-index .service-card {
    background: var(--white);
    border-color: var(--gray-200);
}

[data-theme="dark"] .page-index .service-card:hover {
    border-color: transparent;
}

[data-theme="dark"] .page-index .service-icon {
    background: var(--gray-200);
}

[data-theme="dark"] .page-index .stat-item {
    background: var(--white);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

[data-theme="dark"] .page-index .portfolio-item {
    background: var(--white);
    border-color: var(--gray-200);
}

[data-theme="dark"] .page-index .portfolio-item:hover {
    border-color: transparent;
}

[data-theme="dark"] .page-index .contact-form {
    background: var(--white);
    border-color: var(--gray-200);
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

[data-theme="dark"] .page-index .form-group input,
[data-theme="dark"] .page-index .form-group textarea {
    background: var(--gray-50);
    border-color: var(--gray-300);
    color: var(--gray-800);
}

[data-theme="dark"] .page-index .form-group input:focus,
[data-theme="dark"] .page-index .form-group textarea:focus {
    background: var(--white);
    border-color: var(--teal);
}

[data-theme="dark"] .page-index .contact-icon {
    background: var(--gray-200);
}

[data-theme="dark"] .page-index .hero-content h1 .highlight {
    color: var(--coral-light);
}

[data-theme="dark"] .page-index .hero-badge {
    background: rgba(255,255,255,0.18);
    border-color: rgba(255,255,255,0.25);
}

[data-theme="dark"] .page-index .hero-badge:hover {
    background: rgba(255,255,255,0.25);
}

[data-theme="dark"] .page-index .hero-badge-icon {
    background: rgba(255,255,255,0.25);
}