/* ==========================================================================
   QIHANG / GUOPING BIO-TECH PEPTIDE LANDING PAGE - REVISED STYLES
   ========================================================================== */

/* --- CSS Variables & Design System Tokens --- */
:root {
    --font-primary: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-secondary: #0ea5e9;
    --color-accent: #10b981;
    --color-text-main: #0f172a;
    --color-text-muted: #475569;
    --color-text-light: #64748b;
    --color-bg-base: #f8fafc;
    
    /* Glassmorphism Variables */
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-bg-hover: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(255, 255, 255, 0.85);
    --glass-shadow: 0 10px 30px -5px rgba(37, 99, 235, 0.08), 0 4px 12px -2px rgba(0, 0, 0, 0.03);
    --glass-shadow-hover: 0 20px 40px -10px rgba(37, 99, 235, 0.15), 0 8px 20px -4px rgba(0, 0, 0, 0.06);
    --glass-blur: blur(16px) saturate(180%);
    
    /* Gradients */
    --grad-primary: linear-gradient(135deg, #0ea5e9 0%, #2563eb 50%, #1d4ed8 100%);
    --grad-accent: linear-gradient(135deg, #06b6d4 0%, #10b981 100%);
    --grad-text: linear-gradient(135deg, #0284c7 0%, #2563eb 60%, #4f46e5 100%);
    
    /* Layout Constants */
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --radius-full: 9999px;
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-base);
    color: var(--color-text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    -webkit-font-smoothing: antialiased;
}

/* --- Ambient Floating Blur Background Blobs --- */
.ambient-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: blobFloat 20s infinite alternate cubic-bezier(0.4, 0, 0.2, 1);
}

.blob-1 {
    top: -10%;
    left: 20%;
    width: 550px;
    height: 550px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.45) 0%, rgba(37, 99, 235, 0.15) 100%);
}

.blob-2 {
    top: 40%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.3) 0%, rgba(14, 165, 233, 0.12) 100%);
    animation-delay: -7s;
}

.blob-3 {
    bottom: -10%;
    left: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.25) 0%, rgba(14, 165, 233, 0.08) 100%);
    animation-delay: -14s;
}

@keyframes blobFloat {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(60px, 40px) scale(1.1); }
    100% { transform: translate(-40px, 80px) scale(0.95); }
}

/* --- Layout Utility Classes --- */
.container {
    width: 100%;
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.full-width-section {
    width: 100%;
    padding: 6rem 0;
}

.full-width-container {
    width: 100%;
    padding: 0 3.5rem;
    margin: 0 auto;
}

.max-width-md {
    max-width: 860px;
}

.section-padding {
    padding: 6rem 0;
}

.bg-glass-soft {
    background: rgba(241, 245, 249, 0.5);
    backdrop-filter: blur(8px);
}

.text-center { text-align: center; }
.margin-top-lg { margin-top: 2.5rem; }

.gradient-text {
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-primary { color: var(--color-primary); }
.text-danger { color: #ef4444; }
.text-success { color: var(--color-accent); }

/* --- Glassmorphism Card Style --- */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.glass-card:hover {
    background: var(--glass-bg-hover);
    box-shadow: var(--glass-shadow-hover);
}

/* --- Badge Pills --- */
.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: var(--radius-full);
    background: rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.2);
    color: var(--color-primary);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

/* --- Buttons & Breathing Animation --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.75rem 1.75rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--radius-full);
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--grad-primary);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.5);
}

.btn-glass {
    background: rgba(255, 255, 255, 0.85);
    color: var(--color-text-main);
    border: 1px solid rgba(203, 213, 225, 0.8);
    backdrop-filter: blur(10px);
}

.btn-glass:hover {
    background: #ffffff;
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: #ffffff;
}

.btn-lg {
    padding: 0.95rem 2.25rem;
    font-size: 1.05rem;
}

.btn-full { width: 100%; }

.pulse-btn {
    animation: breathingPulse 2.8s infinite ease-in-out;
}

@keyframes breathingPulse {
    0% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0.6), 0 4px 15px rgba(37, 99, 235, 0.35);
        transform: scale(1);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(37, 99, 235, 0), 0 8px 25px rgba(37, 99, 235, 0.55);
        transform: scale(1.025);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(37, 99, 235, 0), 0 4px 15px rgba(37, 99, 235, 0.35);
        transform: scale(1);
    }
}

/* --- Section Typography --- */
.section-header { margin-bottom: 3.5rem; }

.section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--color-text-main);
    line-height: 1.25;
    margin-bottom: 0.75rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 720px;
    margin: 0 auto;
}

/* --- NAVIGATION BAR --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(20px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    padding: 0.65rem 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    background: var(--grad-primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.logo-text { display: flex; flex-direction: column; }

.brand-name {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--color-text-main);
    line-height: 1;
}

.brand-sub {
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.nav-link:hover { color: var(--color-primary); }

.mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-main);
    cursor: pointer;
}

/* --- FLOATING LIVE TOAST --- */
.live-toast {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 900;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 1);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    border-radius: var(--radius-md);
    padding: 0.85rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.85rem;
    max-width: 380px;
    transform: translateY(120%);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.live-toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-icon {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.toast-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-text-main);
}

.toast-sub {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.toast-close {
    background: transparent;
    border: none;
    font-size: 1.2rem;
    color: var(--color-text-light);
    cursor: pointer;
    margin-left: auto;
}

/* --- SCREEN 1: HERO SECTION --- */
.hero-section {
    padding-top: 8.5rem;
    padding-bottom: 4rem;
}

.grid-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 960px;
    margin: 0 auto;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 100%;
}

.hero-title {
    font-size: 3.1rem;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 1.25rem;
    text-align: center;
}

.hero-description {
    font-size: 1.18rem;
    color: var(--color-text-muted);
    line-height: 1.6;
    margin-bottom: 1.5rem;
    max-width: 820px;
    text-align: center;
}

.hero-target-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 0.9rem 1.5rem;
    background: rgba(255, 255, 255, 0.8);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-text-main);
    margin: 0 auto 1.75rem;
    max-width: 840px;
    text-align: center;
}

.hero-features-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem 2.5rem;
    margin-bottom: 2rem;
    width: 100%;
}

.hero-feature-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text-main);
}

.hero-feature-item i { color: var(--color-accent); }

.hero-cta-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.75rem;
    flex-wrap: wrap;
    width: 100%;
}

.live-ticker-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.5rem 1.25rem;
    background: rgba(254, 242, 242, 0.85);
    border: 1px solid rgba(252, 165, 165, 0.5);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    color: #991b1b;
    margin: 0 auto;
}

.ticker-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ef4444;
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.3);
    animation: blink 1.5s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

/* Hero Right Media Video (9:10 Aspect Ratio + Continuous Loop Autoplay) */
.hero-media-wrapper { position: relative; }

.hero-video-card {
    padding: 1rem;
    overflow: hidden;
}

.card-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    background: rgba(15, 23, 42, 0.8);
    color: #ffffff;
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.hero-video-preview-box {
    position: relative;
    width: 100%;
    aspect-ratio: 9 / 10;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: #000;
}

.video-element {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-video-info { padding: 0.75rem 0.25rem 0.25rem; }

.video-title {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-text-main);
}

.video-sub {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* Stats Bar */
.stats-bar {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 1.75rem 2rem;
    margin-top: 2.5rem;
    flex-wrap: wrap;
    gap: 1.5rem 1rem;
}

.stat-item { text-align: center; }

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.1;
}

.stat-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(203, 213, 225, 0.6);
}

/* --- SCREEN 2: PRODUCTS GRID --- */
.products-grid-full {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.75rem;
    width: 100%;
}

.product-card {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.product-img-wrapper {
    position: relative;
    width: 100%;
    height: 230px;
    overflow: hidden;
}

.product-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-img { transform: scale(1.06); }

.purity-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(16, 185, 129, 0.92);
    color: #ffffff;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    backdrop-filter: blur(4px);
}

.product-info {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-name {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.product-desc {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

.product-specs {
    list-style: none;
    margin-bottom: 1.5rem;
    margin-top: auto;
}

.product-specs li {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.35rem;
}

.product-specs li i { color: var(--color-primary); }

/* --- SCREEN 3: FACTORY SHOWCASE GRID --- */
.factory-showcase-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
}

.factory-card {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
}

.factory-img-box {
    position: relative;
    width: 100%;
    height: 380px;
    overflow: hidden;
}

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

.factory-card:hover .factory-img-box img { transform: scale(1.1); }

.factory-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.3) 60%, rgba(0, 0, 0, 0.1) 100%);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    color: #ffffff;
    transition: var(--transition);
}

.factory-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--grad-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.factory-overlay h3 {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.highlight-text {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 0.5rem;
}

.detail-text {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.4;
}

/* --- SCREEN 4: WORKSHOP VIDEO TOUR (Click to Popup Modal Player) --- */
.grid-two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.align-center { align-items: center; }

.video-swiper-container {
    width: 100%;
    max-width: 100%;
    padding: 1.25rem;
    overflow: hidden;
}

.videoSwiper {
    width: 100%;
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.card-header-badge {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.workshop-video-box {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    max-height: 400px;
    background: #000;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
}

.workshop-poster {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.workshop-video-box:hover .workshop-poster {
    transform: scale(1.06);
}

.video-controls-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.workshop-video-box:hover .video-controls-overlay {
    background: rgba(0, 0, 0, 0.2);
}

.play-circle-btn {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--grad-primary);
    border: none;
    color: #ffffff;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 25px rgba(37, 99, 235, 0.6);
    margin-bottom: 0.75rem;
    transition: var(--transition);
}

.workshop-video-box:hover .play-circle-btn {
    transform: scale(1.15);
}

.video-label {
    color: #ffffff;
    font-weight: 700;
    font-size: 0.85rem;
    background: rgba(0, 0, 0, 0.75);
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-full);
}

.perfect-for-box {
    padding: 1.5rem;
    margin: 1.5rem 0;
}

.perfect-for-box h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.audience-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
}

.audience-tag {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 0.9rem;
    color: var(--color-text-main);
    background: rgba(255, 255, 255, 0.8);
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(226, 232, 240, 0.8);
}

.audience-tag i { color: var(--color-accent); }

/* --- SCREEN 5: CERTIFICATES SWIPER (PC Swapped Position: Text LEFT, Swiper RIGHT) --- */
.cert-swiper-wrapper {
    width: 100%;
    padding: 1.25rem;
    overflow: hidden;
}

.certSwiper {
    width: 100%;
    height: 380px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.cert-img-box {
    position: relative;
    width: 100%;
    height: 340px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(203, 213, 225, 0.6);
}

.cert-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.cert-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.85);
    color: #ffffff;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 0.5rem;
    text-align: center;
}

.features-checklist {
    padding: 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
    margin: 1.5rem 0;
}

.check-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 700;
    font-size: 0.95rem;
}

/* --- SCREEN 6: PIPELINE FLOWCHART --- */
.flowchart-container-compact {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 1.5rem 0;
}

.flow-step-card {
    flex: 1;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    padding: 1.5rem 1rem;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--glass-shadow);
    transition: var(--transition);
}

.flow-step-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
}

.highlight-step {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(14, 165, 233, 0.12) 100%);
    border: 2px solid var(--color-primary);
}

.step-num {
    font-size: 0.75rem;
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    letter-spacing: 0.5px;
}

.step-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(37, 99, 235, 0.1);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin: 0 auto 0.75rem;
}

.step-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.step-desc {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    line-height: 1.3;
}

.flow-arrow-compact {
    color: var(--color-primary);
    font-size: 1.2rem;
    opacity: 0.6;
}

/* --- SCREEN 7: WHY CLIENTS STAY WITH US --- */
.reasons-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.reason-card { overflow: hidden; }

.reason-img-wrapper {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.reason-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.reason-card:hover .reason-img-wrapper img { transform: scale(1.08); }

.reason-body {
    padding: 1.5rem;
    position: relative;
}

.reason-icon-badge {
    position: absolute;
    top: -24px;
    right: 1.5rem;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--grad-primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.reason-body h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.reason-body p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* --- SCREEN 8: OEM SOLUTIONS (Balanced 4+3 Layout) --- */
.oem-balanced-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
}

.oem-row-top {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
}

.oem-row-bottom {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
}

.oem-row-bottom .oem-card {
    flex: 0 1 calc(25% - 1rem);
    min-width: 220px;
}

.oem-card {
    padding: 1.75rem 1.25rem;
    text-align: center;
}

.oem-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: rgba(37, 99, 235, 0.1);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    margin: 0 auto 1rem;
    transition: var(--transition);
}

.oem-card:hover .oem-icon {
    background: var(--grad-primary);
    color: #ffffff;
    transform: rotateY(180deg);
}

.oem-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.oem-card p {
    font-size: 0.825rem;
    color: var(--color-text-muted);
}

/* --- SCREEN 9: COA QUALITY DOCUMENTATION (Fixed Image Height 497px) --- */
.coa-documents-box { padding: 2rem; }

.coa-documents-box h3 {
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 0.35rem;
}

.coa-sub-text {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.doc-list {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.doc-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.85rem 1rem;
    background: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(226, 232, 240, 0.8);
}

.doc-icon { font-size: 1.3rem; }

.doc-details h4 {
    font-size: 0.95rem;
    font-weight: 700;
}

.doc-details p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.doc-badge {
    margin-left: auto;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-accent);
    background: rgba(16, 185, 129, 0.1);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius-full);
}

.coa-sample-preview {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.coa-stamp {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--color-accent);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}

.coa-img-frame {
    height: 497px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #ffffff;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(203, 213, 225, 0.8);
    margin-bottom: 0.85rem;
    overflow: hidden;
}

.coa-preview-img {
    height: 497px;
    max-height: 497px;
    width: auto;
    max-width: 100%;
    object-fit: contain;
    cursor: pointer;
    transition: transform 0.3s ease;
}

.coa-preview-img:hover { transform: scale(1.02); }

.coa-preview-note {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

/* --- SCREEN 10: COOPERATION PROCESS --- */
.process-grid-compact {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.process-card {
    flex: 1;
    padding: 1.5rem 1rem;
    text-align: center;
    position: relative;
}

.highlight-process {
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
    border: 2px solid var(--color-primary);
}

.process-number {
    font-size: 1.5rem;
    font-weight: 800;
    color: rgba(37, 99, 235, 0.25);
    position: absolute;
    top: 0.5rem;
    left: 0.75rem;
}

.process-icon {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.process-card h4 {
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
}

.process-card p {
    font-size: 0.775rem;
    color: var(--color-text-muted);
}

.process-card-arrow {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* --- SCREEN 11: FAQ ACCORDION --- */
.faq-accordion {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.faq-item { overflow: hidden; }

.faq-question {
    width: 100%;
    padding: 1.25rem 1.5rem;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text-main);
    text-align: left;
    cursor: pointer;
}

.faq-icon {
    color: var(--color-primary);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon { transform: rotate(180deg); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 1.5rem;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: 0 1.5rem 1.25rem;
}

.faq-answer p {
    font-size: 0.95rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* --- SCREEN 12: FINAL CTA SECTION & LEAD FORM --- */
.cta-banner-glass {
    padding: 3.5rem 2.5rem;
    text-align: center;
}

.cta-text-side {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.cta-title {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-align: center;
}

.cta-desc {
    font-size: 1.05rem;
    color: var(--color-text-muted);
    margin-bottom: 1.75rem;
    text-align: center;
    max-width: 780px;
}

.cta-perks-box {
    background: rgba(255, 255, 255, 0.7);
    padding: 1.25rem 2rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(226, 232, 240, 0.8);
    text-align: center;
    width: 100%;
    max-width: 780px;
    margin: 0 auto;
}

.perks-title {
    font-weight: 700;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    text-align: center;
}

.perks-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem 1.75rem;
}

.perk-item {
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cta-btn-group {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.lead-form { padding: 2rem; }

.lead-form h3 {
    font-size: 1.4rem;
    font-weight: 800;
    margin-bottom: 0.25rem;
}

.form-subtext {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 1.25rem;
}

.form-group { margin-bottom: 1.1rem; }

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
    color: var(--color-text-main);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(203, 213, 225, 0.8);
    background: rgba(255, 255, 255, 0.9);
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--color-text-main);
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.form-textarea { resize: vertical; }

.form-privacy {
    font-size: 0.75rem;
    color: var(--color-text-light);
    text-align: center;
    margin-top: 0.75rem;
}

/* --- FOOTER & RUO NOTICE --- */
.site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 4rem 0 2rem;
    margin-top: 4rem;
}

.footer-brand-block {
    text-align: center;
    margin-bottom: 2rem;
}

.footer-logo {
    font-size: 1.4rem;
    font-weight: 800;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.footer-logo i { color: var(--color-secondary); }

.footer-tagline { font-size: 0.95rem; }

.ruo-disclaimer-box {
    background: rgba(30, 41, 59, 0.75);
    border: 1px solid rgba(239, 68, 68, 0.4);
    border-radius: var(--radius-sm);
    padding: 1.25rem 1.5rem;
    max-width: 900px;
    margin: 0 auto 2.5rem;
    font-size: 0.825rem;
    line-height: 1.6;
    color: #cbd5e1;
}

.disclaimer-title {
    color: #f87171;
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid rgba(51, 65, 85, 0.6);
    padding-top: 1.5rem;
    font-size: 0.85rem;
}

.footer-links { display: flex; gap: 1.5rem; }

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
    transition: var(--transition);
}

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

/* --- MOBILE STICKY BOTTOM BAR --- */
.mobile-sticky-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 9999;
    background: rgba(255, 255, 255, 0.94);
    backdrop-filter: blur(16px);
    border-top: 1px solid rgba(226, 232, 240, 0.9);
    padding: 0.75rem 1rem;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    gap: 0.75rem;
}

.btn-sticky {
    flex: 1;
    padding: 0.85rem 0.5rem;
    font-size: 0.9rem;
    border-radius: var(--radius-full);
}

/* --- MODAL POPUP DIALOGS --- */
.modal-backdrop {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    width: 100%;
    max-width: 520px;
    padding: 2.25rem;
    position: relative;
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-backdrop.active .modal-card { transform: translateY(0); }

.modal-close {
    position: absolute;
    top: 1.25rem;
    right: 1.25rem;
    background: transparent;
    border: none;
    font-size: 1.75rem;
    color: var(--color-text-light);
    cursor: pointer;
}

.modal-header { margin-bottom: 1.5rem; }

.modal-header h3 {
    font-size: 1.35rem;
    font-weight: 800;
}

.modal-sub {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.modal-img-container {
    max-width: 90vw;
    max-height: 90vh;
    position: relative;
}

.modal-img-container img {
    max-width: 100%;
    max-height: 85vh;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}

.modal-close-img {
    color: #ffffff;
    top: -2.5rem;
    right: 0;
}

/* WORKSHOP VIDEO LIGHTBOX MODAL STYLES (Popup Large Video Requirement) */
.modal-video-container {
    width: 100%;
    max-width: 900px;
    background: #0f172a;
    border-radius: var(--radius-md);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6);
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.modal-video-header {
    padding: 1rem 1.5rem;
    background: rgba(30, 41, 59, 0.9);
    color: #ffffff;
    font-weight: 700;
}

.modal-video-frame {
    width: 100%;
    aspect-ratio: 16 / 9;
    background: #000;
}

.modal-video-frame video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.modal-close-video {
    color: #ffffff;
    top: 0.75rem;
    right: 1.25rem;
}

/* --- RESPONSIVE BREAKPOINTS --- */
@media (max-width: 1100px) {
    .products-grid-full, .factory-showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .oem-row-top { grid-template-columns: repeat(2, 1fr); }

    .oem-row-bottom .oem-card { flex: 1; }
}

@media (max-width: 900px) {
    .grid-hero, .grid-two-col {
        grid-template-columns: 1fr;
    }

    .flowchart-container-compact, .process-grid-compact {
        flex-direction: column;
        gap: 1rem;
    }

    .flow-arrow-compact, .process-card-arrow {
        transform: rotate(90deg);
        margin: 0.25rem 0;
    }

    .coa-img-frame, .coa-preview-img {
        height: auto;
        max-height: 380px;
    }
}

@media (max-width: 768px) {
    html { font-size: 15px; }

    .full-width-container { padding: 0 1.25rem; }

    .mobile-sticky-bar { display: flex; }

    body { padding-bottom: 75px; }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.5rem;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        transition: transform 0.4s ease;
    }

    .nav-menu.active { transform: translateY(0); }

    .mobile-toggle { display: block; }

    .nav-actions .btn { display: none; }

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

    .products-grid-full, .factory-showcase-grid, .oem-row-top {
        grid-template-columns: 1fr;
    }

    .oem-row-bottom { flex-direction: column; }

    .cta-banner-glass { padding: 1.5rem; }

    .stats-bar { grid-template-columns: 1fr 1fr; }
    
    .stat-divider { display: none; }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}