:root {
    --coffee-deep: #1E1209;
    --coffee-rich: #3D261A;
    --coffee-medium: #5C3D2E;
    --coffee-light: #8B6B4A;
    --cream: #F8F4EE;
    --cream-dark: #EDE5D8;
    --terracotta: #B85C38;
    --gold: #C9A227;
    --gold-light: #D4B856;
    --sand: #D4C4A8;
    --text-dark: #1A1410;
    --text-muted: #6B5D52;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--cream);
    color: var(--text-dark);
    line-height: 1.7;
    overflow-x: hidden;
}

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--coffee-deep);
    z-index: 99999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.preloader-logo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    margin-bottom: 2rem;
    animation: pulse 2s ease-in-out infinite;
}

.preloader-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preloader-text {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.2rem;
    color: var(--gold-light);
    letter-spacing: 0.2em;
    margin-bottom: 1.5rem;
}

.preloader-bar {
    width: 200px;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
}

.preloader-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--terracotta), var(--gold));
    width: 0%;
    transition: width 0.3s ease;
    border-radius: 2px;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.8; }
}

/* Hide hero bg until preloader finishes */
body.loading .hero-bg,
body.loading .about-bg,
body.loading .footer {
    opacity: 0 !important;
    transition: opacity 0.3s ease;
}

/* Show bg smoothly after loading */
.hero-bg,
.about-bg,
.footer {
    transition: opacity 0.8s ease;
}

/* Grain texture overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    z-index: 10000;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--cream-dark);
}

::-webkit-scrollbar-thumb {
    background: var(--coffee-medium);
    border-radius: 4px;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: 'Noto Serif SC', 'Cormorant Garamond', serif;
    font-weight: 600;
    letter-spacing: 0.02em;
}

/* Mobile Menu Button */
.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    z-index: 1001;
}

.nav-mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--cream);
    transition: all 0.3s ease;
}

.nav-mobile-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-mobile-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-mobile-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1.5rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav.scrolled {
    background: rgba(30, 18, 9, 0.95);
    backdrop-filter: blur(20px);
    padding: 1rem 4rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--cream);
}

.nav-logo img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    transition: transform 0.3s;
}

.nav-logo:hover img {
    transform: scale(1.1);
}

.nav-logo-text {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: 0.1em;
}

.nav-links {
    display: flex;
    gap: 1.8rem;
    list-style: none;
}

.nav-links a {
    color: var(--cream);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.05em;
    position: relative;
    padding: 0.5rem 0;
    opacity: 0.85;
    transition: opacity 0.3s;
    white-space: nowrap;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--gold);
    transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links a:hover {
    opacity: 1;
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--coffee-deep);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: url('../images/ppt_homepage_background.jpeg') center/cover no-repeat;
    opacity: 0.35;
    transform: scale(1.1);
    animation: heroZoom 20s ease-in-out infinite alternate;
}

@keyframes heroZoom {
    0% { transform: scale(1.1); }
    100% { transform: scale(1.15); }
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(30, 18, 9, 0.3) 0%,
        rgba(30, 18, 9, 0.6) 50%,
        rgba(30, 18, 9, 0.95) 100%
    );
}

.hero-content {
    position: relative;
    text-align: center;
    color: var(--cream);
    padding: 2rem;
    max-width: 900px;
}

.hero-tagline {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(0.9rem, 2vw, 1.1rem);
    font-style: italic;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--gold-light);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.5s forwards;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.7s forwards;
}

.hero-title span {
    display: block;
    color: var(--gold-light);
    font-size: 0.5em;
    margin-top: 0.5rem;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    font-weight: 300;
    opacity: 0;
    animation: fadeInUp 1s ease 0.9s forwards;
    margin-bottom: 3rem;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 3rem;
    background: transparent;
    border: 1px solid var(--gold);
    color: var(--cream);
    font-size: 0.85rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    animation: fadeInUp 1s ease 1.1s forwards;
    position: relative;
    overflow: hidden;
}

.hero-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gold);
    transform: translateX(-101%);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.hero-btn:hover::before {
    transform: translateX(0);
}

.hero-btn span {
    position: relative;
    z-index: 1;
}

.hero-btn svg {
    position: relative;
    z-index: 1;
    transition: transform 0.3s;
}

.hero-btn:hover svg {
    transform: translateX(8px);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-scroll {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--cream);
    opacity: 0.6;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    letter-spacing: 0.2em;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(10px); }
    60% { transform: translateX(-50%) translateY(5px); }
}

/* Section Common Styles */
.section {
    padding: 6rem 4rem;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
}

.section-label {
    font-family: 'Cormorant Garamond', serif;
    font-size: 0.85rem;
    font-style: italic;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--terracotta);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    color: var(--coffee-deep);
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.section-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.9;
}

/* About Section - PPT第二页样式 */
.about {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.about-bg {
    position: absolute;
    inset: 0;
    background: url('../images/ppt_slide2_background.jpeg') center/cover no-repeat;
    z-index: 0;
}

.about-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(30, 18, 9, 0.7) 0%, rgba(30, 18, 9, 0.5) 50%, rgba(30, 18, 9, 0.3) 100%);
    z-index: 0;
}

.about-content {
    position: relative;
    z-index: 1;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 6rem 4rem;
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 4rem;
    align-items: center;
}

.about-logo {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: 0 20px 50px -10px rgba(0, 0, 0, 0.5);
    flex-shrink: 0;
    border: 4px solid rgba(255, 255, 255, 0.2);
}

.about-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-text {
    padding: 3rem;
    background: transparent;
}

.about-text h2 {
    font-size: 2rem;
    color: #FFFFFF;
    margin-bottom: 1.5rem;
    font-weight: 600;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
}

.about-text p {
    color: #FFFFFF;
    margin-bottom: 1rem;
    font-size: 0.95rem;
    line-height: 1.9;
    text-indent: 2em;
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.5);
}

.about-text .highlight {
    font-size: 1.1rem;
    font-weight: 600;
    color: #FFD700;
    text-indent: 0;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    text-shadow: 0 1px 5px rgba(0, 0, 0, 0.5);
}

.about-philosophy {
    margin-top: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, var(--coffee-deep), var(--coffee-rich));
    border-radius: 4px;
    position: relative;
    overflow: hidden;
}

.about-philosophy::before {
    content: '"';
    position: absolute;
    top: -20px;
    left: 20px;
    font-family: 'Cormorant Garamond', serif;
    font-size: 6rem;
    color: var(--gold);
    opacity: 0.2;
    line-height: 1;
}

.about-philosophy-text {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.3rem;
    color: var(--cream);
    font-style: italic;
    position: relative;
    z-index: 1;
}

.about-philosophy-sub {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--gold-light);
    letter-spacing: 0.1em;
}

/* Services Section */
.services {
    background: var(--coffee-deep);
    color: var(--cream);
    position: relative;
    overflow: hidden;
}

.services::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

.services .section-label {
    color: var(--gold-light);
}

.services .section-title {
    color: var(--cream);
}

.services .section-desc {
    color: rgba(248, 244, 238, 0.7);
}

.services-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.service-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(201, 162, 39, 0.2);
    border-radius: 4px;
    padding: 2.5rem 2rem;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    text-decoration: none;
    display: block;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--terracotta), var(--gold));
    transform: scaleX(0);
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(201, 162, 39, 0.4);
    transform: translateY(-8px);
}

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

.service-icon {
    width: 70px;
    height: 70px;
    margin-bottom: 1.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--gold), var(--terracotta));
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}

.service-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.service-card:hover .service-icon {
    transform: scale(1.1) rotate(5deg);
}

.service-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--cream);
}

.service-card p {
    color: rgba(248, 244, 238, 0.7);
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.service-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gold-light);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    transition: all 0.3s;
}

.service-card:hover .service-link {
    gap: 1rem;
    color: var(--gold);
}

/* Footer */
.footer {
    background: url('../images/ppt_homepage_background.jpeg') center/cover no-repeat;
    color: var(--cream);
    padding: 2rem 1rem;
    text-align: center;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(30, 18, 9, 0.9);
}

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

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 0.5rem;
}

.footer-logo {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.footer-brand-name {
    font-family: 'Noto Serif SC', serif;
    font-size: 1.3rem;
    letter-spacing: 0.1em;
}

.footer-tagline {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    color: var(--gold-light);
    font-size: 1rem;
    margin-bottom: 0.8rem;
}

.footer-copyright {
    color: rgba(248, 244, 238, 0.5);
    font-size: 0.85rem;
}

/* Floating Particles */
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--gold);
    border-radius: 50%;
    opacity: 0.3;
    animation: float-particle 15s infinite linear;
}

@keyframes float-particle {
    0% {
        transform: translateY(100vh) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 0.3;
    }
    90% {
        opacity: 0.3;
    }
    100% {
        transform: translateY(-100vh) rotate(720deg);
        opacity: 0;
    }
}

/* Mouse cursor effect */
.cursor-dot {
    width: 8px;
    height: 8px;
    background: var(--gold);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    transition: transform 0.1s ease;
    mix-blend-mode: difference;
}

.cursor-outline {
    width: 40px;
    height: 40px;
    border: 1px solid var(--gold);
    border-radius: 50%;
    position: fixed;
    pointer-events: none;
    z-index: 9998;
    transition: transform 0.15s ease, width 0.3s ease, height 0.3s ease;
    mix-blend-mode: difference;
}

.cursor-outline.hover {
    width: 60px;
    height: 60px;
    background: rgba(201, 162, 39, 0.1);
}

/* Smooth hover effects */
.service-card, .product-item, .quality-step, .timeline-item {
    cursor: pointer;
}

/* Hero content animations */
.hero-content > * {
    will-change: transform, opacity;
}

/* Enhanced reveal animations */
.reveal-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* Stagger animation delays */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* Card hover lift effect */
.card-lift {
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-lift:hover {
    transform: translateY(-12px);
    box-shadow: 0 25px 50px -15px rgba(30, 18, 9, 0.2);
}

/* Image zoom on hover */
.img-zoom {
    overflow: hidden;
}

.img-zoom img {
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.img-zoom:hover img {
    transform: scale(1.08);
}

/* Text gradient animation */
.text-gradient {
    background: linear-gradient(90deg, var(--gold-light), var(--cream), var(--gold-light));
    background-size: 200% auto;
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient-shift 3s linear infinite;
}

@keyframes gradient-shift {
    0% { background-position: 0% center; }
    100% { background-position: 200% center; }
}

/* Scroll bar indicator */
.scroll-indicator {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--terracotta), var(--gold));
    z-index: 10001;
    transition: width 0.1s ease;
}

/* Parallax sections */
.parallax-section {
    position: relative;
    overflow: hidden;
}

.parallax-bg {
    position: absolute;
    top: -20%;
    left: 0;
    right: 0;
    height: 140%;
    background-size: cover;
    background-position: center;
    will-change: transform;
}

/* Scroll Animations */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Page Header for subpages */
.page-header {
    min-height: 50vh;
    background: var(--coffee-deep);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.page-header-bg {
    position: absolute;
    inset: 0;
    opacity: 0.2;
    background-size: cover;
    background-position: center;
}

.page-header-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(30, 18, 9, 0.5) 0%, rgba(30, 18, 9, 0.9) 100%);
}

.page-header-content {
    position: relative;
    text-align: center;
    color: var(--cream);
    padding: 2rem;
}

.page-header-label {
    font-family: 'Cormorant Garamond', serif;
    font-size: 0.9rem;
    font-style: italic;
    letter-spacing: 0.3em;
    color: var(--gold-light);
    margin-bottom: 1rem;
}

.page-header-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 500;
    margin-bottom: 1rem;
}

.page-header-desc {
    font-size: 1.1rem;
    color: rgba(248, 244, 238, 0.8);
    max-width: 600px;
    margin: 0 auto;
}

/* Content Sections */
.content-section {
    padding: 5rem 4rem;
}

.content-section-alt {
    background: var(--cream-dark);
}

.content-wrapper {
    max-width: 1200px;
    margin: 0 auto;
}

/* Grid layouts */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

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

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}

/* Image styles */
.img-fluid {
    width: 100%;
    height: auto;
    border-radius: 4px;
}

.img-cover {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 4px;
    box-shadow: 0 20px 40px -10px rgba(30, 18, 9, 0.15);
}

.img-circle {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

/* Cards */
.card {
    background: var(--cream);
    border-radius: 4px;
    padding: 2rem;
    transition: all 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px -10px rgba(30, 18, 9, 0.1);
}

.card-dark {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(201, 162, 39, 0.15);
}

.card-dark:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(201, 162, 39, 0.3);
}

/* Step list */
.step-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.step-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--cream);
    border-radius: 4px;
    border-left: 3px solid transparent;
    transition: all 0.3s;
}

.step-item:hover {
    border-left-color: var(--terracotta);
    box-shadow: 0 10px 25px -5px rgba(30, 18, 9, 0.1);
}

.step-number {
    font-family: 'Cormorant Garamond', serif;
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--gold);
    line-height: 1;
    min-width: 50px;
}

.step-content h4 {
    font-size: 1.1rem;
    color: var(--coffee-deep);
    margin-bottom: 0.5rem;
}

.step-content p {
    font-size: 0.95rem;
    color: var(--text-muted);
    line-height: 1.7;
}

/* Process Grid */
.process-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.process-item {
    background: var(--cream);
    border-radius: 4px;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.process-item:hover {
    border-left-color: var(--terracotta);
    transform: translateY(-3px);
    box-shadow: 0 10px 25px -5px rgba(30, 18, 9, 0.1);
}

.process-icon {
    width: 50px;
    height: 50px;
    min-width: 50px;
    border-radius: 50%;
    overflow: hidden;
    background: linear-gradient(135deg, var(--sand), var(--cream-dark));
}

.process-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.process-content h4 {
    font-size: 1rem;
    color: var(--coffee-deep);
    margin-bottom: 0.3rem;
}

.process-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* Highlight box */
.highlight-box {
    background: linear-gradient(135deg, var(--terracotta), var(--gold));
    color: var(--cream);
    padding: 2rem 3rem;
    border-radius: 4px;
    text-align: center;
    font-family: 'Noto Serif SC', serif;
    font-size: 1.3rem;
    box-shadow: 0 10px 30px -5px rgba(184, 92, 56, 0.4);
}

/* Badge */
.badge {
    position: absolute;
    top: -15px;
    right: -15px;
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--terracotta), var(--gold));
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--cream);
    text-align: center;
    box-shadow: 0 15px 30px -5px rgba(184, 92, 56, 0.5);
}

.badge-number {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.8rem;
    font-weight: 600;
    line-height: 1;
}

.badge-text {
    font-size: 0.55rem;
    letter-spacing: 0.1em;
    margin-top: 0.2rem;
}

/* Contact Section */
.contact-section {
    text-align: center;
}

.contact-images {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-images img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    border-radius: 50%;
    box-shadow: 0 20px 40px -10px rgba(30, 18, 9, 0.2);
    transition: transform 0.4s;
}

.contact-images img:hover {
    transform: scale(1.05);
}

.contact-title {
    font-size: clamp(2rem, 4vw, 2.5rem);
    color: var(--coffee-deep);
    margin-bottom: 1rem;
}

.contact-desc {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 3rem;
    background: linear-gradient(135deg, var(--coffee-deep), var(--coffee-rich));
    color: var(--cream);
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    border-radius: 4px;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 30px -10px rgba(30, 18, 9, 0.4);
}

.contact-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px -10px rgba(30, 18, 9, 0.5);
}

/* Responsive */
@media (max-width: 1024px) {
    .section {
        padding: 4rem 2rem;
    }

    .content-section {
        padding: 3rem 2rem;
    }

    .nav {
        padding: 1rem 2rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 4rem 2rem;
    }

    .about-logo {
        width: 200px;
        height: 200px;
        margin: 0 auto;
    }

    .about-text {
        padding: 1.5rem;
    }

    .grid-2 {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .services-grid,
    .grid-3 {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .contact-images {
        flex-wrap: wrap;
    }

    .badge {
        width: 80px;
        height: 80px;
    }

    .badge-number {
        font-size: 1.4rem;
    }
}

@media (max-width: 768px) {
    .nav-mobile-toggle {
        display: flex;
    }

    .nav {
        padding: 0.8rem 1rem;
    }

    .nav-logo img {
        width: 32px;
        height: 32px;
    }

    .nav-logo-text {
        font-size: 1rem;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 75%;
        max-width: 300px;
        height: 100vh;
        background: var(--coffee-deep);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 1.5rem;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        padding: 3rem 2rem;
        z-index: 999;
    }

    .nav-links.active {
        right: 0;
        box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
    }

    .nav-links a {
        font-size: 1.1rem;
        padding: 0.8rem 0;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 0.95rem;
    }

    .hero-btn {
        padding: 1rem 2rem;
        font-size: 0.8rem;
    }

    .hero-content {
        padding: 1.5rem;
    }

    .about {
        min-height: auto;
        padding-top: 5rem;
        padding-bottom: 3rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 3rem 1.5rem;
    }

    .about-logo {
        width: 150px;
        height: 150px;
        margin: 0 auto;
    }

    .about-text h2 {
        font-size: 1.4rem;
        text-align: center;
    }

    .about-text p {
        text-align: left;
        font-size: 0.9rem;
    }

    .about-text .highlight {
        font-size: 1rem;
        text-align: center;
    }

    .about-philosophy {
        padding: 1.5rem;
    }

    .about-philosophy-text {
        font-size: 1.1rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .service-card {
        padding: 1.5rem;
    }

    .service-icon {
        width: 50px;
        height: 50px;
    }

    .service-card h4 {
        font-size: 1.1rem;
    }

    .service-card p {
        font-size: 0.85rem;
    }

    .grid-4 {
        grid-template-columns: 1fr;
    }

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

    .contact-images {
        flex-direction: column;
        align-items: center;
    }

    .contact-images img {
        width: 120px;
        height: 120px;
    }

    .section {
        padding: 3rem 1rem;
    }

    .section-header {
        margin-bottom: 2.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .section-desc {
        font-size: 0.95rem;
    }

    .content-section {
        padding: 2rem 1rem;
    }

    .grid-2, .grid-3 {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .page-header {
        min-height: 40vh;
    }

    .page-header-content {
        padding: 1.5rem;
    }

    .page-header-label {
        font-size: 0.8rem;
    }

    .page-header-title {
        font-size: 1.8rem;
    }

    .page-header-desc {
        font-size: 0.95rem;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

    .footer {
        padding: 1.5rem 1rem;
    }

    .footer-logo {
        width: 35px;
        height: 35px;
    }

    .footer-brand-name {
        font-size: 1.1rem;
    }

    .footer-tagline {
        font-size: 0.9rem;
    }

    /* Preloader mobile */
    .preloader-logo {
        width: 60px;
        height: 60px;
    }

    .preloader-text {
        font-size: 1rem;
    }

    .preloader-bar {
        width: 150px;
    }
}

/* Extra small devices */
@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .hero-tagline {
        font-size: 0.75rem;
        letter-spacing: 0.2em;
    }

    .section-label {
        font-size: 0.75rem;
    }

    .about-logo {
        width: 120px;
        height: 120px;
    }

    .service-card {
        padding: 1.2rem;
    }

    .contact-btn {
        padding: 1rem 2rem;
        font-size: 0.8rem;
    }

    .hero-scroll {
        display: none;
    }

    .page-header-label {
        font-size: 0.8rem;
    }

    .page-header-title {
        font-size: 1.5rem;
    }
}

/* Mobile touch optimizations */
@media (max-width: 768px) {
    /* 禁用hover效果以提升移动端性能 */
    .service-card:hover,
    .product-item:hover,
    .quality-feature-card:hover,
    .quality-step:hover,
    .timeline-item:hover,
    .contact-method:hover,
    .contact-card:hover {
        transform: none;
    }

    /* 优化触摸区域 */
    .nav-links a,
    .hero-btn,
    .contact-btn,
    .service-link {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    /* 隐藏粒子效果提升性能 */
    .particles {
        display: none;
    }

    /* 优化滚动指示器 */
    .scroll-indicator {
        display: none;
    }
}

/* 图片懒加载样式 */
.img-lazy {
    opacity: 0;
    transition: opacity 0.5s ease;
}

.img-lazy.loaded {
    opacity: 1;
}

/* 图片加载占位符 */
.img-placeholder {
    background: linear-gradient(135deg, var(--cream-dark) 0%, var(--cream) 50%, var(--cream-dark) 100%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* 产品图片背景优化 */
.product-img {
    background: linear-gradient(135deg, #f5f0e8 0%, #ebe4d8 100%);
}