/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1a1a1a;
    --background-color: #f8f9fa;
    --text-color: #111111;
    --hover-color: #666666;
    --max-width: 1200px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
}

body {
    font-family: var(--font-family);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
    position: relative;
}

/* Ambient Background (Scroll-Triggered) */
#ambient-bg {
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    opacity: 0; /* Hidden by default */
    transition: opacity 0.8s ease-in-out;
}

#ambient-bg.show {
    opacity: 1; /* Triggered by JS */
}

.ambient-shape {
    position: absolute;
    width: 60vw;
    height: 60vw;
    max-width: 800px;
    max-height: 800px;
    border-radius: 50%;
    filter: blur(80px);
}

.left-orb {
    top: 10%;
    left: -20%;
    background: radial-gradient(circle, rgba(0,0,0,0.03) 0%, transparent 60%);
}

.right-orb {
    bottom: 5%;
    right: -20%;
    background: radial-gradient(circle, rgba(0,0,0,0.03) 0%, transparent 60%);
}

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

/* Navigation - Floating Pill Header */
.navigation {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 90%;
    max-width: 1000px;
    background-color: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    z-index: 1000;
    padding: 10px 20px;
    border: 1px solid rgba(255, 255, 255, 0.8);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0;
}

.nav-brand h1 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    letter-spacing: -0.02em;
    margin: 0;
}

.nav-brand a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

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

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

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 400;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-links a::after {
    display: none;
}

.nav-links a.active {
    color: var(--primary-color);
    font-weight: 500;
}

.nav-links a.active::after {
    display: none;
}

/* CTA Button in Navigation */
.nav-cta {
    background: #111111;
    color: white !important;
    border-radius: 30px;
    padding: 10px 24px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background: #333333;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

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

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 var(--spacing-md);
    position: relative;
    overflow: hidden;
}

/* Parallax Background Container */
#parallax-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    overflow-x: hidden;
    pointer-events: none;
}

/* Container handles the drop shadow for all shapes */
.float-item {
    position: absolute;
    z-index: -1;
    filter: drop-shadow(0px 24px 32px rgba(0,0,0,0.02));
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
    will-change: transform;
    opacity: 0.6;
}

/* Base shape styles */
.shape {
    transition: transform 0.3s ease;
}

/* 1. Tilted Pill - Very Blurry (Foreground) */
.shape-pill {
    width: 240px;
    height: 90px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.5) 0%, rgba(240, 240, 240, 0.4) 100%);
    border-radius: 50px;
    transform: rotate(-30deg);
    filter: blur(16px);
    opacity: 0.5;
}

/* 2. Soft Gradient Circle - Moderately Blurry */
.shape-circle {
    width: 180px;
    height: 180px;
    background: linear-gradient(135deg, rgba(250, 250, 250, 0.6) 0%, rgba(235, 235, 235, 0.5) 100%);
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 0, 0.03);
    filter: blur(8px);
    opacity: 0.6;
}

/* 3. Accent Diamond - Slightly Out of Focus */
.shape-diamond {
    width: 32px;
    height: 32px;
    background: rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    transform: rotate(45deg);
    filter: blur(3px);
    opacity: 0.7;
}

/* 4. Hollow Ring - Subtle Blur */
.shape-ring {
    width: 140px;
    height: 140px;
    border: 20px solid rgba(0, 0, 0, 0.04);
    border-radius: 50%;
    background: transparent;
    filter: blur(6px);
    opacity: 0.5;
}

/* 5. Tilted Soft Square - Light Blur */
.shape-square {
    width: 80px;
    height: 80px;
    background: linear-gradient(120deg, rgba(245, 245, 245, 0.6) 0%, rgba(230, 230, 230, 0.5) 100%);
    border-radius: 20px;
    transform: rotate(15deg);
    filter: blur(5px);
    opacity: 0.6;
}

.hero-content {
    text-align: center;
    max-width: 90%;
}

/* Hero Title - Ultra-thin Apple Style */
.hero-title {
    font-size: clamp(4rem, 8vw, 8rem);
    font-weight: 100;
    letter-spacing: 0.5em;
    color: #333333;
    margin: 0;
    line-height: 1.1;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 1.5s ease-out 0.5s forwards;
    cursor: default;
    user-select: none;
    transition: all 0.3s ease;
}

/* Individual letter spans for mouse interaction */
.hero-title span {
    display: inline-block;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    filter: blur(0px);
    opacity: 1;
}

/* Breathing animation for idle state */
.hero-title.breathing {
    animation: breathe 4s ease-in-out infinite;
}

@keyframes breathe {
    0%, 100% {
        opacity: 1;
        transform: translateY(0);
    }
    50% {
        opacity: 0.8;
        transform: translateY(-5px);
    }
}

/* Hero Subtitle */
.hero-subtitle {
    font-size: 1rem;
    font-weight: 300;
    color: #666666;
    margin-top: 3rem;
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 1.5s ease-out 1s forwards;
    letter-spacing: 0.1em;
    line-height: 1.6;
}

/* Subtitle letter spans for mouse interaction */
.hero-subtitle span {
    display: inline-block;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    filter: blur(0px);
    opacity: 1;
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Gallery - Shelf Display */
.gallery-shelf {
    background-color: var(--background-color);
    padding: var(--spacing-lg) 0;
}

/* Gallery Header */
.gallery-header {
    text-align: center;
    margin-bottom: 60px;
    padding-top: 40px;
}

/* Gallery Headline */
.gallery-headline {
    font-size: 4rem;
    font-weight: 700;
    color: #111;
    letter-spacing: 0.02em;
    line-height: 1.2;
    margin-bottom: 50px;
}

.gallery-subheadline {
    display: block;
    font-size: 1.6rem;
    font-weight: 300;
    font-family: "Helvetica Neue", Helvetica, -apple-system, BlinkMacSystemFont, Arial, sans-serif;
    color: #777;
    margin-top: 15px;
    letter-spacing: 0;
}

.highlight-underline {
    position: relative;
    display: inline-block;
    z-index: 1;
}

.highlight-underline::after {
    content: '';
    position: absolute;
    left: -5%;
    bottom: 0px;
    width: 110%;
    height: 5px;
    background-color: #007AFF; /* Vibrant SaaS blue */
    z-index: -1;
    border-radius: 4px;
    opacity: 0.6;
}

/* Marquee Styles */
.marquee-wrapper {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    overflow: hidden;
    /* Faded edges mask */
    -webkit-mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
    mask-image: linear-gradient(to right, transparent, black 15%, black 85%, transparent);
}

.marquee-track {
    display: flex;
    width: max-content;
    animation: scrollMarquee 25s linear infinite;
}

.marquee-track:hover {
    animation-play-state: paused; /* Optional: pause on hover */
}

.marquee-content {
    display: flex;
    gap: 40px;
    padding-right: 40px; /* matches gap */
}

.marquee-content span {
    font-size: 1.1rem;
    font-weight: 300;
    font-family: "Helvetica Neue", Helvetica, -apple-system, BlinkMacSystemFont, Arial, sans-serif;
    color: #999; /* Subtle light gray */
    text-transform: none;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

@keyframes scrollMarquee {
    0% { 
        transform: translateX(0); 
    }
    100% { 
        transform: translateX(-50%); 
    }
}

/* Shelf Rows */
.shelf-row {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 80px var(--spacing-md);
    border-bottom: 1px solid #f0f0f0;
}

.shelf-row:last-of-type {
    border-bottom: none;
}

.shelf-items {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-end;
    gap: 40px;
    flex-wrap: wrap;
}

.shelf-item {
    position: relative;
    transition: all 0.4s ease-out;
    flex: 0 0 auto;
    max-width: 300px;
}

.shelf-item a {
    display: block;
    position: relative;
    text-decoration: none;
    color: inherit;
}

.shelf-item:hover {
    cursor: pointer;
}

.shelf-item img {
    display: block;
    border-radius: 8px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transition: all 0.4s ease-out;
    width: 100%;
    max-width: 300px;
    height: auto;
}

.shelf-item:hover img {
    transform: scale(0.95);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
}

.shelf-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.7) 100%);
    display: flex;
    align-items: flex-end;
    padding: 20px;
    opacity: 0;
    transition: all 0.4s ease-out;
    border-radius: 8px;
}

.shelf-item:hover .shelf-overlay {
    opacity: 1;
}

.shelf-overlay h3 {
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

/* Brand Strip */
.brand-strip {
    background-color: var(--background-color);
    padding: 60px 0;
    border-top: 1px solid #f0f0f0;
}

.brand-items {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
}

.brand-icon {
    height: 50px;
    width: 50px;
    object-fit: contain;
    opacity: 0.6;
    filter: grayscale(100%) contrast(150%);
    transition: all 0.3s ease;
    margin: 0 10px;
}

.brand-icon:hover {
    opacity: 1;
    filter: none;
}

/* Responsive Design for Shelf Gallery */
@media (max-width: 1024px) {
    .shelf-items {
        gap: 30px;
    }
    
    .shelf-item {
        max-width: 280px;
    }
}

@media (max-width: 768px) {
    .shelf-row {
        padding: 60px var(--spacing-md);
    }
    
    .shelf-items {
        gap: 25px;
        justify-content: center;
    }
    
    .shelf-item {
        max-width: 250px;
    }
    
    .brand-strip {
        padding: 40px 0;
    }
    
    .brand-items {
        gap: 30px;
    }
    
    .brand-icon {
        height: 45px;
        width: 45px;
        margin: 0 8px;
    }
}

@media (max-width: 480px) {
    .shelf-row {
        padding: 40px var(--spacing-sm);
    }
    
    .shelf-items {
        flex-direction: column;
        align-items: center;
        gap: 30px;
    }
    
    .shelf-item {
        max-width: 100%;
        width: 90%;
    }
    
    .brand-items {
        gap: 25px;
    }
    
    .brand-icon {
        height: 40px;
        width: 40px;
        margin: 0 5px;
    }
}

/* Profile + Skills Section */
.profile-skills {
    padding: var(--spacing-lg) 0;
    background-color: var(--background-color);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.profile-skills-container {
    max-width: 1200px;
    width: 80%;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    gap: 4rem;
    align-items: flex-start;
}

/* Left Column - Profile (30% width) */
.profile-column {
    flex: 0 0 30%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.avatar-container {
    margin-bottom: 1.5rem;
    align-self: flex-start;
    margin-top: 0;
}

.avatar {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #f0f0f0;
}

.profile-name {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--primary-color);
    margin-bottom: 2.5rem;
    letter-spacing: 0.1em;
    align-self: flex-start;
}

.profile-buttons {
    display: flex;
    gap: 1rem;
    align-self: flex-start;
}

.btn-resume, .btn-contact {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    border: none;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.05em;
    text-decoration: none;
    text-align: center;
}

.btn-resume {
    background-color: #ff6b35;
    color: white;
}

.btn-resume:hover {
    background-color: #e55a2b;
    transform: translateY(-2px);
}

.btn-contact {
    background-color: white;
    color: var(--primary-color);
    border: 2px solid #e0e0e0;
}

.btn-contact:hover {
    background-color: #f8f8f8;
    border-color: #d0d0d0;
    transform: translateY(-2px);
}

/* Right Column - Skills (70% width) */
.skills-column {
    flex: 0 0 70%;
    padding-left: 2rem;
}

.skills-title {
    font-size: 1.5rem;
    font-weight: 300;
    color: var(--primary-color);
    margin-bottom: 2rem;
    letter-spacing: 0.1em;
}

.skills-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.skill-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.skill-name {
    font-size: 0.95rem;
    color: var(--text-color);
    font-weight: 400;
}

.skill-percentage {
    font-size: 0.85rem;
    color: var(--hover-color);
    font-weight: 500;
}

.skill-bar {
    width: 100%;
    height: 8px;
    background-color: #e8e8e8;
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background-color: #333333;
    border-radius: 4px;
    transition: width 1s ease-out;
}

/* Minimal Footer */
.footer {
    padding: 2rem 0;
    background-color: var(--background-color);
    border-top: 1px solid #f5f5f5;
}

.footer-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    text-align: center;
}

.contact-text {
    font-size: 0.9rem;
    color: #999999;
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.copyright-text {
    font-size: 0.8rem;
    color: #cccccc;
    letter-spacing: 0.05em;
}

/* Responsive Design for Profile + Skills */
@media (max-width: 768px) {
    .profile-skills-container {
        flex-direction: column;
        gap: 3rem;
        width: 95%;
    }
    
    .profile-column {
        flex: none;
        align-items: center;
        text-align: center;
    }
    
    .skills-column {
        flex: none;
        width: 100%;
        padding-left: 0;
    }
    
    .avatar {
        width: 150px;
        height: 150px;
    }
    
    .profile-name {
        align-self: center;
        text-align: center;
    }
    
    .profile-buttons {
        justify-content: center;
        align-self: center;
    }
    
    .btn-resume, .btn-contact {
        padding: 0.5rem 1.2rem;
        font-size: 0.8rem;
    }
    
    .skills-title {
        text-align: center;
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .profile-skills {
        padding: var(--spacing-md) 0;
    }
    
    .profile-skills-container {
        gap: 2rem;
    }
    
    .avatar {
        width: 100px;
        height: 100px;
    }
    
    .profile-name {
        font-size: 1.3rem;
    }
    
    .skills-title {
        font-size: 1.2rem;
    }
    
    .contact-text {
        font-size: 0.8rem;
        line-height: 1.4;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .gallery {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 1.5rem;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-md: 1rem;
        --spacing-lg: 2rem;
    }

    .nav-container {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--background-color);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        gap: var(--spacing-md);
    }

    .nav-links.active {
        display: flex;
    }

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

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

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

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero {
        height: 100vh;
        margin: 0;
        padding: 0 var(--spacing-md);
    }

    .hero-title {
        font-size: clamp(3rem, 12vw, 6rem);
        letter-spacing: 0.3em;
    }

    .hero-subtitle {
        font-size: 0.9rem;
        margin-top: 2rem;
        padding: 0 1rem;
    }

    .gallery {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        margin: var(--spacing-md) auto;
    }

    .gallery-item {
        max-width: 100%;
    }

    .footer-content {
        gap: var(--spacing-sm);
    }

    .social-links {
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: var(--spacing-sm);
    }

    .nav-brand h1 {
        font-size: 1.3rem;
    }

    .hero-title {
        font-size: clamp(2.5rem, 15vw, 4rem);
        letter-spacing: 0.2em;
    }

    .hero-subtitle {
        font-size: 0.8rem;
        line-height: 1.5;
        margin-top: 1.5rem;
    }

    .gallery {
        padding: 0 var(--spacing-sm);
    }

    .gallery-overlay {
        padding: var(--spacing-sm);
    }

    .gallery-overlay h3 {
        font-size: 1rem;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus states for accessibility */
a:focus,
button:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* About Section */
.about {
    padding: 100px 0;
    background-color: var(--background-color);
}

/* About Page (Dedicated Page) - Premium Editorial Style */
.about-page {
    min-height: calc(100vh - 200px);
    padding: 0;
    background-color: var(--background-color);
}

.about-premium-container {
    max-width: 900px;
    margin: 120px auto 100px auto;
    padding: 0 20px;
    color: #111;
}

.about-hero {
    text-align: center;
    margin-bottom: 80px;
}

.about-headline {
    font-size: 3rem;
    font-weight: 700;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
}

.about-subheadline {
    font-size: 1.2rem;
    font-weight: 300;
    color: #666;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

/* Blue Highlight Effects */
.text-blue {
    color: #007AFF;
    padding-right: 4px;
    font-weight: 800;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.highlight-blue {
    position: relative;
    z-index: 1;
    display: inline-block;
}

.highlight-blue::after {
    content: '';
    position: absolute;
    left: -2%;
    bottom: 6px;
    width: 104%;
    height: 10px;
    background-color: #007AFF;
    opacity: 0.35;
    z-index: -1;
    border-radius: 4px;
}

.about-section {
    margin-bottom: 60px;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 24px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eaeaea;
}

.about-body p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: #444;
    margin-bottom: 20px;
}

/* Premium Douyin Link */
.premium-link-wrapper {
    margin: 30px 0;
}

.douyin-link {
    display: inline-block;
    background-color: #007AFF;
    color: #fff;
    padding: 14px 28px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.douyin-link:hover {
    background-color: #0066d6;
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(0, 122, 255, 0.25);
}

/* Value Props Grid */
.about-value-props {
    margin-top: 100px;
    padding-top: 60px;
    border-top: 1px solid #eaeaea;
}

.value-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 50px;
}

.value-title span {
    display: block;
    font-size: 1.1rem;
    font-weight: 300;
    color: #888;
    margin-top: 10px;
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
}

.prop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.prop-card {
    background: #fff;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.04);
    border: 1px solid rgba(0,0,0,0.02);
    transition: transform 0.3s ease;
}

.prop-card:hover {
    transform: translateY(-5px);
}

.prop-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: #111;
}

.prop-card p {
    font-size: 1rem;
    line-height: 1.6;
    color: #555;
    margin: 0;
}

/* About Section Responsive */
@media (max-width: 768px) {
    .about {
        padding: 60px 0;
    }
    
    .about-premium-container {
        margin: 80px auto 60px auto;
        padding: 0 20px;
    }
    
    .about-hero {
        margin-bottom: 60px;
    }
    
    .about-headline {
        font-size: 2.2rem;
    }
    
    .about-subheadline {
        font-size: 1.05rem;
    }
    
    .about-section {
        margin-bottom: 50px;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .about-body p {
        font-size: 1.05rem;
    }
    
    .about-value-props {
        margin-top: 80px;
        padding-top: 50px;
    }
    
    .value-title {
        font-size: 1.7rem;
        margin-bottom: 40px;
    }
    
    .prop-grid {
        gap: 24px;
    }
    
    .prop-card {
        padding: 30px 24px;
    }
}

@media (max-width: 480px) {
    .about {
        padding: 40px 0;
    }
    
    .about-premium-container {
        margin: 60px auto 60px auto;
        padding: 0 16px;
    }
    
    .about-hero {
        margin-bottom: 50px;
    }
    
    .about-headline {
        font-size: 1.8rem;
        line-height: 1.3;
    }
    
    .about-subheadline {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.2rem;
    }
    
    .about-body p {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .douyin-link {
        font-size: 0.95rem;
        padding: 12px 24px;
    }
    
    .about-value-props {
        margin-top: 60px;
        padding-top: 40px;
    }
    
    .value-title {
        font-size: 1.5rem;
        margin-bottom: 35px;
    }
    
    .value-title span {
        font-size: 1rem;
    }
    
    .prop-card {
        padding: 28px 20px;
    }
    
    .prop-card h3 {
        font-size: 1.2rem;
    }
    
    .prop-card p {
        font-size: 0.95rem;
    }
}

/* Contact Page (Dedicated Page) */
.contact-page {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 0;
    background-color: var(--background-color);
}

.contact-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.contact-card {
    text-align: center;
    padding: 60px 40px;
    background-color: var(--background-color);
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.contact-title {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--primary-color);
    margin-bottom: 3rem;
    letter-spacing: 0.1em;
}

.contact-details {
    margin-bottom: 3rem;
}

.contact-item {
    margin-bottom: 2rem;
}

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

.contact-item h3 {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
}

.contact-item p {
    font-size: 1.1rem;
    color: #555555;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.contact-note {
    padding-top: 2rem;
    border-top: 1px solid #f0f0f0;
}

.contact-note p {
    font-size: 1rem;
    color: #777777;
    line-height: 1.6;
    font-style: italic;
}

/* Contact Page Responsive */
@media (max-width: 768px) {
    .contact-page {
        padding: 60px 0;
        min-height: calc(100vh - 160px);
    }
    
    .contact-card {
        padding: 40px 30px;
    }
    
    .contact-title {
        font-size: 2rem;
        margin-bottom: 2rem;
    }
    
    .contact-item h3 {
        font-size: 1.1rem;
    }
    
    .contact-item p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .contact-page {
        padding: 40px 0;
    }
    
    .contact-card {
        padding: 30px 20px;
    }
    
    .contact-title {
        font-size: 1.8rem;
    }
    
    .contact-item h3 {
        font-size: 1rem;
    }
    
    .contact-item p {
        font-size: 0.95rem;
    }
    
    .contact-note p {
        font-size: 0.9rem;
    }
}

/* Project Detail Page */
.project-detail {
    background-color: var(--background-color);
}

.project-hero {
    padding: 0;
    margin-top: 0;
}

.project-hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0;
}

.project-video-container {
    width: 100%;
    background-color: #000;
    margin-top: 120px;
}

.project-video-container video {
    width: 100%;
    height: auto;
    display: block;
}

.project-video-container.vertical-layout {
    aspect-ratio: auto;
    max-height: 75vh;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.project-video-container.vertical-layout video {
    width: auto;
    height: 100%;
    max-height: 75vh;
}

.project-hero-image {
    width: 100%;
    height: auto;
    max-height: 600px;
    object-fit: cover;
    display: block;
}

.project-content {
    padding: 80px 0;
}

.project-content-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.project-header {
    text-align: center;
    margin-bottom: 60px;
}

.project-title {
    font-size: 2.5rem;
    font-weight: 300;
    color: var(--primary-color);
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}

.project-subtitle {
    font-size: 1.1rem;
    color: var(--hover-color);
    font-weight: 400;
    letter-spacing: 0.1em;
}

.project-body {
    margin-bottom: 60px;
}

.project-section {
    margin-bottom: 40px;
}

.project-section h2 {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--primary-color);
    margin-bottom: 20px;
    letter-spacing: 0.05em;
}

.project-section p {
    font-size: 1rem;
    line-height: 1.8;
    color: #555555;
    margin-bottom: 20px;
    text-align: left;
}

.project-section p:last-child {
    margin-bottom: 0;
}

.project-navigation {
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid #f0f0f0;
}

.back-to-work {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    transition: all 0.3s ease;
}

.back-to-work:hover {
    background-color: var(--hover-color);
    transform: translateY(-2px);
}

/* Project Detail Responsive */
@media (max-width: 768px) {
    .project-content {
        padding: 60px 0;
    }
    
    .project-header {
        margin-bottom: 40px;
    }
    
    .project-title {
        font-size: 2rem;
    }
    
    .project-subtitle {
        font-size: 1rem;
    }
    
    .project-section h2 {
        font-size: 1.3rem;
    }
    
    .project-section p {
        font-size: 0.95rem;
        line-height: 1.7;
    }
}

@media (max-width: 480px) {
    .project-content {
        padding: 40px 0;
    }
    
    .project-title {
        font-size: 1.8rem;
    }
    
    .project-section h2 {
        font-size: 1.2rem;
    }
    
    .project-section p {
        font-size: 0.9rem;
    }
    
    .back-to-work {
        padding: 10px 25px;
        font-size: 0.85rem;
    }
}