:root {
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #fafafa;
    --color-text: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #86868b;
    --color-accent: #0071e3;
    --color-accent-hover: #0077ed;
    --color-border: #d2d2d7;
    --color-border-light: #e8e8ed;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.1);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 28px;
    --easing: cubic-bezier(0.25, 0.1, 0.25, 1);
    --easing-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --transition-fast: 0.2s var(--easing);
    --transition-base: 0.35s var(--easing);
    --transition-slow: 0.6s var(--easing);
    --max-width: 1200px;
    --nav-height: 48px;
    --font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-stack);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

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

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: 16px;
    background: linear-gradient(180deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: var(--color-text-secondary);
    font-weight: 400;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 980px;
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:active {
    transform: scale(0.97);
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
    border: 1.5px solid var(--color-accent);
    padding: 12.5px 28px;
}

.btn-secondary:hover {
    background-color: rgba(0, 113, 227, 0.06);
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.88);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--max-width);
    width: 100%;
    height: 100%;
    margin: 0px 100px 1px 150px;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 17px;
}

.logo-mark {
    width: 24px;
    height: 24px;
    border-radius: 7px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #5ac8fa 100%);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}

.nav-link {
    position: relative;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: 8px;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text);
    background-color: rgba(0, 0, 0, 0.04);
}

.nav-link.active {
    color: var(--color-text);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background-color: var(--color-accent);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.hero {
    position: relative;
    min-height: 100vh;
    padding-top: calc(var(--nav-height) + 40px);
    padding-bottom: 80px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}

.gradient-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    animation: float 20s ease-in-out infinite;
}

.blob-1 {
    width: 600px;
    height: 600px;
    background: linear-gradient(135deg, #e8f4fd 0%, #f0e6ff 100%);
    top: -200px;
    left: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 500px;
    height: 500px;
    background: linear-gradient(135deg, #fff0e6 0%, #ffe8f0 100%);
    bottom: -150px;
    right: -100px;
    animation-delay: -7s;
}

.blob-3 {
    width: 400px;
    height: 400px;
    background: linear-gradient(135deg, #e6fff0 0%, #e6f4ff 100%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(30px, -30px) scale(1.05);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.95);
    }
}

.hero-content {
    position: relative;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background-color: rgba(0, 113, 227, 0.08);
    border-radius: 980px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 24px;
}

.hero-title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.08;
    margin-bottom: 24px;
}

.hero-name {
    background: linear-gradient(135deg, var(--color-accent) 0%, #5856d6 50%, #af52de 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-role {
    display: inline-flex;
    align-items: center;
    font-size: clamp(24px, 3.5vw, 40px);
    font-weight: 600;
    color: var(--color-text-secondary);
    min-height: 1.2em;
}

.typewriter {
    color: var(--color-text);
}

.cursor {
    display: inline-block;
    color: var(--color-accent);
    animation: blink 1s step-end infinite;
    margin-left: 2px;
}

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

.hero-subtitle {
    font-size: clamp(16px, 1.6vw, 19px);
    color: var(--color-text-secondary);
    margin-bottom: 40px;
    max-width: 520px;
    line-height: 1.7;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 56px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 24px 0;
    border-top: 1px solid var(--color-border-light);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-size: clamp(28px, 3vw, 36px);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.stat-label {
    font-size: 13px;
    color: var(--color-text-tertiary);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background-color: var(--color-border-light);
}

.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 500px;
}

.avatar-wrapper {
    position: relative;
    width: 360px;
    height: 360px;
}

.avatar-ring {
    position: absolute;
    inset: -12px;
    border-radius: 50%;
    background: conic-gradient(from 0deg, var(--color-accent), #5856d6, #af52de, #ff2d55, #ff9500, var(--color-accent));
    animation: rotate 10s linear infinite;
    opacity: 0.8;
}

.avatar-ring::before {
    content: '';
    position: absolute;
    inset: 4px;
    border-radius: 50%;
    background-color: white;
}

@keyframes rotate {
    to { transform: rotate(360deg); }
}

.avatar-glow {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 113, 227, 0.15) 0%, transparent 70%);
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.1); opacity: 1; }
}

.avatar {
    position: absolute;
    inset: 12px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

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

.floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 18px;
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
    animation: floatCard 6s ease-in-out infinite;
}

.card-1 {
    top: 40px;
    left: -20px;
    animation-delay: 0s;
}

.card-2 {
    bottom: 60px;
    right: -10px;
    animation-delay: -3s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.card-icon {
    font-size: 24px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.card-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
}

.card-desc {
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-tertiary);
    font-size: 12px;
    font-weight: 500;
    animation: bounceInfinite 2s ease-in-out infinite;
}

.scroll-arrow {
    animation: bounceArrow 2s ease-in-out infinite;
}

@keyframes bounceArrow {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

@keyframes bounceInfinite {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

.about {
    padding: 120px 0;
    background-color: var(--color-bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.about-heading {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 24px;
}

.about-text {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 32px;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background-color: white;
    border: 1px solid var(--color-border-light);
    border-radius: 980px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.tag:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-border);
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.highlight-card {
    padding: 28px 24px;
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid transparent;
}

.highlight-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-border-light);
}

.highlight-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, rgba(88, 86, 214, 0.1) 100%);
    color: var(--color-accent);
    margin-bottom: 20px;
}

.highlight-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.highlight-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.projects {
    padding: 120px 0;
    background-color: var(--color-bg);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.project-card {
    background-color: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-light);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background-color: var(--color-bg-secondary);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--easing);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(0, 0, 0, 0.6) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
    display: flex;
    align-items: flex-end;
    justify-content: flex-end;
    padding: 20px;
}

.project-card:hover .project-overlay {
    opacity: 1;
}

.project-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white;
    border-radius: 50%;
    color: var(--color-text);
    transform: scale(0.8);
    transition: transform var(--transition-base) var(--easing-spring);
    box-shadow: var(--shadow-md);
}

.project-card:hover .project-link {
    transform: scale(1);
}

.project-link:hover {
    background-color: var(--color-accent);
    color: white;
}

.project-body {
    padding: 24px;
}

.project-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.project-category {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.project-date {
    font-size: 12px;
    color: var(--color-text-tertiary);
    font-weight: 500;
}

.project-title {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 10px;
    line-height: 1.3;
}

.project-desc {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-tags span {
    padding: 5px 12px;
    background-color: var(--color-bg-secondary);
    border-radius: 980px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.contact {
    padding: 120px 0;
    background-color: var(--color-bg-secondary);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background-color: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.contact-card:hover {
    transform: translateX(6px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 52px;
    height: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, rgba(88, 86, 214, 0.08) 100%);
    color: var(--color-accent);
    flex-shrink: 0;
}

.contact-label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text-tertiary);
    margin-bottom: 4px;
}

.contact-value {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
}

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

.social-links {
    display: flex;
    gap: 12px;
    margin-top: 12px;
    padding: 0 4px;
}

.social-link {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: white;
    border-radius: 50%;
    color: var(--color-text-secondary);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.social-link:hover {
    transform: translateY(-4px);
    color: white;
    background: linear-gradient(135deg, var(--color-accent) 0%, #5856d6 100%);
    box-shadow: var(--shadow-md);
}

.contact-form {
    background-color: white;
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    font-family: inherit;
    color: var(--color-text);
    background-color: var(--color-bg-secondary);
    border: 1.5px solid transparent;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
    resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-tertiary);
}

.form-group input:hover,
.form-group textarea:hover {
    background-color: #ececf0;
}

.form-group input:focus,
.form-group textarea:focus {
    background-color: white;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
}

.btn-submit {
    width: 100%;
    justify-content: center;
    padding: 16px 28px;
    font-size: 16px;
}

.form-success {
    display: none;
    margin-top: 20px;
    padding: 14px 18px;
    background-color: rgba(52, 199, 89, 0.12);
    border-radius: var(--radius-md);
    color: #34c759;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
}

.form-success.show {
    display: block;
    animation: fadeInUp 0.4s var(--easing);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.footer {
    padding: 48px 0 32px;
    background-color: var(--color-text);
    color: white;
}

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

.footer-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-brand .logo-text {
    color: white;
    font-weight: 600;
}

.footer-text {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 8px;
}

.footer-copyright {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background-color: white;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    color: var(--color-text);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

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

.back-to-top:hover {
    background-color: var(--color-accent);
    color: white;
    transform: translateY(-4px);
}

.back-to-top:active {
    transform: scale(0.95);
}

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--easing), transform 0.8s var(--easing);
}

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

@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }

    .hero-text {
        order: 2;
    }

    .hero-visual {
        order: 1;
        min-height: 380px;
    }

    .avatar-wrapper {
        width: 280px;
        height: 280px;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

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

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

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links.mobile-open {
        display: flex;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        padding: 16px;
        background-color: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--color-border-light);
    }

    .nav-links.mobile-open .nav-link {
        width: 100%;
        padding: 14px 16px;
        font-size: 15px;
    }

    .about {
        padding: 80px 0;
    }

    .projects {
        padding: 80px 0;
    }

    .contact {
        padding: 80px 0;
    }

    .section-header {
        margin-bottom: 48px;
    }

    .about-highlights {
        grid-template-columns: 1fr;
    }

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

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .contact-form {
        padding: 28px 20px;
    }

    .hero-stats {
        gap: 24px;
    }

    .floating-card {
        padding: 10px 14px;
    }

    .card-1 {
        left: 0;
    }

    .card-2 {
        right: 0;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

.hero-centered {
    padding-top: calc(var(--nav-height) + 60px);
    padding-bottom: 100px;
}

.hero-content-centered {
    grid-template-columns: 1fr;
    gap: 0;
}

.hero-text-centered {
    text-align: center;
    margin: 0 auto;
    max-width: 900px;
}

.hero-text-centered .hero-eyebrow {
    margin-left: auto;
    margin-right: auto;
}

.hero-text-centered .hero-subtitle {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.hero-text-centered .hero-cta {
    justify-content: center;
}

.hero-text-centered .hero-stats {
    justify-content: center;
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

.projects-prominent {
    padding-top: 100px;
    padding-bottom: 140px;
}

.projects-featured {
    margin-bottom: 56px;
}

.project-card-large {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 0;
    overflow: hidden;
    border-radius: var(--radius-xl);
    background: white;
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
}

.project-card-large:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.project-image-large {
    aspect-ratio: auto;
    height: 100%;
    min-height: 360px;
}

.project-image-large img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.project-card-large .project-body {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.project-card-large .project-title {
    font-size: 28px;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
}

.project-card-large .project-desc {
    font-size: 16px;
    line-height: 1.75;
    margin-bottom: 24px;
}

.project-card-large .project-tags {
    margin-bottom: 24px;
}

.project-card-large .project-tags span {
    padding: 7px 14px;
    font-size: 13px;
}

.project-link-large {
    width: auto !important;
    height: auto !important;
    border-radius: 980px !important;
    padding: 12px 22px !important;
    display: inline-flex !important;
    align-items: center !important;
    gap: 8px !important;
    font-size: 14px !important;
    font-weight: 500 !important;
}

.project-badge-featured {
    position: absolute;
    top: 20px;
    left: 20px;
    z-index: 2;
    padding: 6px 14px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #5856d6 100%);
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: 980px;
    letter-spacing: 0.3px;
    box-shadow: 0 4px 12px rgba(0, 113, 227, 0.3);
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid var(--color-border-light);
}

.project-rating {
    display: flex;
    align-items: center;
    gap: 10px;
}

.project-rating .stars {
    color: #ffb400;
    font-size: 15px;
    letter-spacing: 1px;
}

.project-rating span {
    font-size: 13px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.project-platform {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.project-platform:hover {
    background-color: var(--color-accent);
    color: white;
}

.about-grid-simple {
    gap: 64px;
}

@media (max-width: 968px) {
    .project-card-large {
        grid-template-columns: 1fr;
    }

    .project-image-large {
        min-height: 280px;
    }

    .project-card-large .project-body {
        padding: 28px 24px;
    }

    .project-card-large .project-title {
        font-size: 22px;
    }

    .project-card-large .project-desc {
        font-size: 15px;
    }

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

    .about-grid-simple {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .hero-centered {
        padding-top: calc(var(--nav-height) + 40px);
        padding-bottom: 60px;
    }

    .btn-large {
        padding: 14px 24px;
        font-size: 15px;
    }

    .projects-prominent {
        padding-top: 60px;
        padding-bottom: 80px;
    }

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

    .project-card-large .project-body {
        padding: 24px 20px;
    }

    .project-card-large .project-title {
        font-size: 20px;
    }

    .project-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 14px;
    }

    .project-badge-featured {
        top: 14px;
        left: 14px;
        padding: 5px 12px;
        font-size: 11px;
    }
}

.apps-section {
    padding: 120px 0;
    background-color: var(--color-bg-secondary);
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px 32px;
    max-width: 900px;
    margin: 0 auto;
    padding: 40px;
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(40px);
    -webkit-backdrop-filter: blur(40px);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.8);
    box-shadow: var(--shadow-md);
}

.app-icon-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: all var(--transition-base) var(--easing-spring);
    padding: 8px;
    border-radius: var(--radius-lg);
}

.app-icon-wrapper:hover {
    transform: translateY(-6px) scale(1.05);
}

.app-icon-wrapper:active {
    transform: scale(0.95);
}

.app-icon {
    width: 84px;
    height: 84px;
    border-radius: 22px;
    background: white;
    box-shadow:
        0 8px 24px rgba(0, 0, 0, 0.1),
        0 2px 6px rgba(0, 0, 0, 0.06),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    padding: 2px;
    transition: all var(--transition-base);
    overflow: hidden;
}

.app-icon-wrapper:hover .app-icon {
    box-shadow:
        0 14px 36px rgba(0, 0, 0, 0.14),
        0 4px 10px rgba(0, 0, 0, 0.08),
        inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

.app-icon-inner {
    width: 100%;
    height: 100%;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-name {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    text-align: center;
    line-height: 1.2;
}

.app-category {
    font-size: 11px;
    color: var(--color-text-tertiary);
    font-weight: 500;
    margin-top: -6px;
}

.app-modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.app-modal.open {
    display: flex;
    animation: fadeIn 0.2s var(--easing);
}

.app-modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.app-modal-content {
    position: relative;
    width: 100%;
    max-width: 720px;
    max-height: 90vh;
    overflow-y: auto;
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.25);
    animation: modalIn 0.4s var(--easing-spring);
    -webkit-overflow-scrolling: touch;
}

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

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.92) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.app-modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 10;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.06);
    border-radius: 50%;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.app-modal-close:hover {
    background: rgba(0, 0, 0, 0.12);
    color: var(--color-text);
    transform: scale(1.05);
}

.app-modal-close:active {
    transform: scale(0.95);
}

.app-modal-header {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 32px 32px 24px;
    border-bottom: 1px solid var(--color-border-light);
}

.app-modal-icon {
    width: 96px;
    height: 96px;
    border-radius: 24px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow:
        0 8px 24px rgba(0, 0, 0, 0.12),
        0 2px 6px rgba(0, 0, 0, 0.06);
    padding: 2px;
}

.app-modal-icon > svg {
    width: 100%;
    height: 100%;
}

.app-modal-header-info {
    flex: 1;
    min-width: 0;
}

.app-modal-header-info h2 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
    line-height: 1.2;
}

.app-modal-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--color-text-secondary);
    font-weight: 500;
    margin-bottom: 8px;
}

.dot-sep {
    opacity: 0.5;
}

.app-modal-rating {
    display: flex;
    align-items: center;
    gap: 10px;
}

.app-modal-rating .stars {
    color: #ffb400;
    font-size: 14px;
    letter-spacing: 1px;
}

.app-modal-rating span {
    font-size: 13px;
    color: var(--color-text-secondary);
}

.app-modal-download {
    padding: 12px 22px;
    font-size: 14px;
    gap: 6px;
    flex-shrink: 0;
}

.apk-download-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    margin-top: 14px;
    padding: 12px 16px;
    border-radius: 12px;
    color: #ffffff;
    background: linear-gradient(135deg, #ff9500 0%, #ff7a00 100%);
    box-shadow: 0 8px 20px rgba(255, 149, 0, 0.24);
    text-decoration: none;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.apk-download-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(255, 149, 0, 0.32);
}

.apk-download-btn[hidden] {
    display: none;
}

.apk-download-copy {
    display: flex;
    flex-direction: column;
    gap: 2px;
    line-height: 1.2;
}

.apk-download-copy strong {
    font-size: 15px;
    font-weight: 700;
}

.apk-download-copy small {
    font-size: 12px;
    opacity: 0.82;
}

.app-modal-screenshots {
    padding: 24px 0 24px 32px;
    overflow: hidden;
}

.screenshots-scroll {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    padding-right: 32px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
}

.screenshots-scroll::-webkit-scrollbar {
    height: 4px;
}

.screenshots-scroll::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
    border-radius: 4px;
}

.screenshots-scroll::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

.screenshots-scroll img {
    width: 220px;
    height: 294px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    flex-shrink: 0;
    scroll-snap-align: start;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border-light);
}

.app-modal-body {
    padding: 0 32px 32px;
}

.app-modal-body h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 12px;
    margin-top: 24px;
    letter-spacing: -0.01em;
}

.app-modal-body h3:first-child {
    margin-top: 0;
}

.app-modal-body p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.75;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feature-list li {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.5;
    padding: 10px 14px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.modal-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.modal-tags span {
    padding: 7px 14px;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.08) 0%, rgba(88, 86, 214, 0.08) 100%);
    color: var(--color-accent);
    border-radius: 980px;
    font-size: 13px;
    font-weight: 500;
}

.chat-widget {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 1500;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
}

.chat-toggle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent) 0%, #5856d6 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 28px rgba(0, 113, 227, 0.4);
    transition: all var(--transition-base) var(--easing-spring);
    cursor: pointer;
}

.chat-toggle:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 36px rgba(0, 113, 227, 0.5);
}

.chat-toggle:active {
    transform: scale(0.95);
}

.chat-icon-close {
    display: none;
}

.chat-widget.open .chat-icon-open {
    display: none;
}

.chat-widget.open .chat-icon-close {
    display: block;
}

.chat-panel {
    width: 380px;
    max-width: calc(100vw - 48px);
    height: 560px;
    max-height: calc(100vh - 120px);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.15),
        0 4px 12px rgba(0, 0, 0, 0.06);
    display: none;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid var(--color-border-light);
    animation: chatIn 0.35s var(--easing-spring);
}

@keyframes chatIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.96);
        transform-origin: bottom right;
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.chat-widget.open .chat-panel {
    display: flex;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: linear-gradient(135deg, var(--color-accent) 0%, #5856d6 100%);
    color: white;
    flex-shrink: 0;
}

.chat-header-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-title {
    font-size: 15px;
    font-weight: 600;
}

.chat-subtitle {
    font-size: 12px;
    opacity: 0.85;
    display: flex;
    align-items: center;
    gap: 6px;
}

.chat-status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #34c759;
    box-shadow: 0 0 0 2px rgba(52, 199, 89, 0.25);
    display: inline-block;
}

.chat-panel-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.chat-panel-close:hover {
    background: rgba(255, 255, 255, 0.25);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background: var(--color-bg-secondary);
}

.chat-message {
    display: flex;
    max-width: 85%;
}

.agent-message {
    align-self: flex-start;
}

.user-message {
    align-self: flex-end;
}

.chat-bubble {
    padding: 10px 14px;
    border-radius: var(--radius-lg);
    font-size: 14px;
    line-height: 1.55;
    word-wrap: break-word;
}

.agent-message .chat-bubble {
    background: white;
    color: var(--color-text);
    border-bottom-left-radius: 6px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.user-message .chat-bubble {
    background: linear-gradient(135deg, var(--color-accent) 0%, #5856d6 100%);
    color: white;
    border-bottom-right-radius: 6px;
}

.chat-bubble p + p {
    margin-top: 8px;
}

.chat-quick-replies {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--color-border-light);
}

.quick-reply {
    padding: 6px 12px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-light);
    color: var(--color-accent);
    border-radius: 980px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.quick-reply:hover {
    background: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.chat-input-area {
    padding: 12px 16px;
    background: white;
    border-top: 1px solid var(--color-border-light);
    flex-shrink: 0;
}

.chat-input-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: 6px 6px 6px 16px;
    transition: box-shadow var(--transition-fast), background var(--transition-fast);
}

.chat-input-wrapper:focus-within {
    background: white;
    box-shadow: 0 0 0 2px rgba(0, 113, 227, 0.2);
}

.chat-input-wrapper input {
    flex: 1;
    border: none;
    background: transparent;
    outline: none;
    font-size: 14px;
    font-family: inherit;
    padding: 8px 0;
    color: var(--color-text);
}

.chat-input-wrapper input::placeholder {
    color: var(--color-text-tertiary);
}

.chat-send-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent) 0%, #5856d6 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: transform var(--transition-fast);
}

.chat-send-btn:hover {
    transform: scale(1.05);
}

.chat-send-btn:active {
    transform: scale(0.95);
}

.chat-send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.chat-disclaimer {
    font-size: 10px;
    color: var(--color-text-tertiary);
    text-align: center;
    margin-top: 8px;
}

.typing-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 0;
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-text-tertiary);
    animation: typing 1.4s infinite;
}

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

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

@keyframes typing {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.4;
    }
    30% {
        transform: translateY(-4px);
        opacity: 1;
    }
}

@media (max-width: 968px) {
    .apps-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 32px 24px;
        padding: 32px 24px;
    }

    .app-icon {
        width: 72px;
        height: 72px;
    }

    .app-icon-inner svg {
        width: 36px !important;
        height: 36px !important;
    }
}

@media (max-width: 768px) {
    .apps-section {
        padding: 60px 0;
    }

    .apps-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 28px 16px;
        padding: 24px 16px;
        border-radius: var(--radius-lg);
    }

    .app-icon {
        width: 64px;
        height: 64px;
        border-radius: 16px;
    }

    .app-icon-inner {
        border-radius: 14px;
    }

    .app-icon-inner svg {
        width: 32px !important;
        height: 32px !important;
    }

    .app-name {
        font-size: 12px;
    }

    .app-modal {
        padding: 0;
    }

    .app-modal-content {
        max-height: 100vh;
        height: 100vh;
        border-radius: 0;
        max-width: 100%;
    }

    .app-modal-header {
        padding: 56px 20px 20px;
        flex-wrap: wrap;
        gap: 16px;
    }

    .app-modal-download {
        width: 100%;
        justify-content: center;
    }

    .app-modal-icon {
        width: 80px;
        height: 80px;
        border-radius: 20px;
    }

    .app-modal-screenshots {
        padding: 20px 0 20px 20px;
    }

    .screenshots-scroll {
        padding-right: 20px;
    }

    .screenshots-scroll img {
        width: 180px;
        height: 240px;
    }

    .app-modal-body {
        padding: 0 20px 32px;
    }

    .chat-widget {
        right: 16px;
        bottom: 16px;
    }

    .chat-panel {
        width: calc(100vw - 32px);
        position: fixed;
        left: 16px;
        right: 16px;
        bottom: 84px;
        height: 70vh;
        max-height: calc(100vh - 120px);
    }

    .chat-toggle {
        width: 52px;
        height: 52px;
    }
}

@media (max-width: 480px) {
    .apps-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 24px 12px;
    }

    .app-icon {
        width: 58px;
        height: 58px;
    }

    .app-icon-inner svg {
        width: 28px !important;
        height: 28px !important;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.apps-section.apps-hero {
    padding-top: calc(var(--nav-height) + 32px);
}

.apps-hero-intro {
    text-align: center;
    max-width: 760px;
    margin: 0 auto 24px;
}

.apps-hero-eyebrow {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-accent);
    margin-bottom: 16px;
    letter-spacing: 0.02em;
}

.apps-hero-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--color-text);
}

.apps-hero-name {
    background: linear-gradient(135deg, var(--color-accent) 0%, #5856d6 50%, #af52de 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.apps-hero-subtitle {
    font-size: clamp(15px, 1.4vw, 18px);
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 36px;
}

.apps-hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 36px;
    padding: 24px 0;
    border-top: 1px solid var(--color-border-light);
    border-bottom: 1px solid var(--color-border-light);
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .apps-section.apps-hero {
        padding-top: calc(var(--nav-height) + 20px);
    }
    .apps-hero-stats {
        gap: 20px;
        padding: 20px 0;
    }
    .stat-divider {
        display: none;
    }
    .apps-hero-stats .stat-item {
        flex: 1 1 40%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .apps-hero-stats {
        gap: 16px 12px;
    }
    .apps-hero-stats .stat-number {
        font-size: 24px;
    }
}

/* ===================================
   左右分栏布局（桌面端）
   左侧：参考 Guang's Space 单列居中布局
   右侧：聊天框独立一列贴右缘
   =================================== */
@media (min-width: 1100px) {
    .page-layout {
        display: grid;
        grid-template-columns: 1fr 380px;
        gap: 0;
        max-width: none;
        margin: 0;
        padding: 0;
        width: 100%;
    }

    .page-main {
        min-width: 0;
        padding-right: 32px;
        background: transparent;
    }

    .page-sidebar {
        position: sticky;
        top: calc(var(--nav-height) + 24px);
        height: calc(100vh - var(--nav-height) - 48px);
        padding-left: 0;
        padding-right: 0;
        margin-right: 0;
    }

    /* 侧边栏模式下的 Agent：去掉浮窗，全高度展开 */
    .chat-widget.sidebar-mode {
        position: static;
        width: 100%;
        height: 100%;
        margin: 0;
        z-index: 10;
        background: #FFFFFF;
        border: 1px solid rgba(0, 0, 0, 0.05);
        border-radius: 18px 0 0 18px;
        overflow: hidden;
    }

    .chat-widget.sidebar-mode .chat-toggle {
        display: none;
    }

    .chat-widget.sidebar-mode .chat-panel {
        position: relative;
        right: auto;
        bottom: auto;
        width: 100%;
        height: 100%;
        max-height: none;
        opacity: 1 !important;
        visibility: visible !important;
        transform: none !important;
        display: flex !important;
        pointer-events: auto;
        box-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
        border: 1px solid var(--color-border-light);
        border-radius: 20px;
        flex-direction: column;
    }

    .chat-widget.sidebar-mode .chat-messages {
        flex: 1 1 auto;
        min-height: 0;
    }

    .chat-widget.sidebar-mode .chat-header {
        flex-shrink: 0;
    }

    .chat-widget.sidebar-mode .chat-input-area {
        flex-shrink: 0;
        display: block !important;
    }

    .chat-widget.sidebar-mode .chat-panel-close {
        display: none;
    }
}

@media (min-width: 1280px) {
    .page-layout {
        grid-template-columns: 1fr 400px;
    }
    .chat-widget.sidebar-mode {
        border-radius: 18px 0 0 18px;
    }
}

/* 移动端：恢复浮窗模式（page-sidebar 不做 sticky，chat-widget 用原来的浮窗样式） */
@media (max-width: 1099px) {
    .page-layout {
        display: block;
    }

    .page-sidebar {
        position: static;
        height: auto;
    }

    .chat-widget.sidebar-mode {
        position: fixed;
        right: 24px;
        bottom: 24px;
        z-index: 100;
    }

    .chat-widget.sidebar-mode:not(.open) .chat-panel {
        display: none;
    }
}

/* ===================================
   参考 Guang's Space 的整体风格
   =================================== */
body {
    background: linear-gradient(180deg, #FAF6F0 0%, #FDFBF7 50%, #FDFBF7 100%);
}

/* -------- Hero 大卡片 -------- */
.hero-card {
    border-radius: 18px;
    padding: 48px 56px;
    margin-bottom: 32px;
    background: #FFFFFF;
    border: 1px solid rgba(0, 0, 0, 0.05);
    overflow: hidden;
}

.hero-card-tag {
    font-size: 12px;
    letter-spacing: 0.28em;
    font-weight: 600;
    color: #9A8B7A;
    margin: 0 0 20px;
    text-transform: uppercase;
}

.hero-card-title {
    font-size: clamp(42px, 6vw, 68px);
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.02;
    color: #111;
    margin: 0 0 20px;
}

.hero-card-desc {
    font-size: 15px;
    line-height: 1.7;
    color: #55534F;
    margin: 0;
    max-width: 640px;
}

/* -------- 作品列表头部 -------- */
.works-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 0 0 24px;
    gap: 16px;
    flex-wrap: wrap;
}

.works-title {
    font-size: 18px;
    font-weight: 700;
    color: #1A1A1A;
    letter-spacing: -0.01em;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.works-count {
    font-size: 16px;
    color: #8A8680;
    font-weight: 500;
}

.works-filters {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    height: 34px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    background: #FFF;
    color: #444;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
}

.filter-btn:hover {
    background: #F6F2EC;
    color: #111;
    transform: translateY(-1px);
}

.filter-btn:active {
    transform: scale(0.97);
}

.filter-btn.active {
    background: #FF6B00;
    color: #FFF;
    border-color: transparent;
    box-shadow: 0 4px 12px rgba(255, 107, 0, 0.22);
}

.filter-dropdown .filter-btn::after {
    content: '';
    display: block;
    width: 1px;
    height: 14px;
    background: rgba(0,0,0,0.08);
    margin: 0 2px;
}

/* -------- 作品卡片网格 -------- */
.works-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.work-card {
    background: #FFFFFF;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 14px;
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    cursor: pointer;
    position: relative;
}

.work-card::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.06);
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}

.work-card:hover {
    transform: translateY(-3px);
    border-color: rgba(255, 107, 0, 0.2);
}

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

.work-card:active {
    transform: scale(0.98);
}

.work-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
}

.status-tag {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.status-online {
    background: #E6F7EC;
    color: #1F8A4C;
    border: 1px solid rgba(31, 138, 76, 0.15);
}

.status-wip {
    background: #FFF2D6;
    color: #B26B00;
    border: 1px solid rgba(178, 107, 0, 0.15);
}

.work-date {
    color: #9B958C;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
}

.work-title {
    font-size: 19px;
    font-weight: 700;
    letter-spacing: -0.015em;
    line-height: 1.3;
    color: #111;
    margin: 0;
}

.work-desc {
    font-size: 13.5px;
    line-height: 1.65;
    color: #625E57;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: calc(13.5px * 1.65 * 2);
}

.work-card-bottom {
    margin-top: auto;
    padding-top: 8px;
    border-top: 1px dashed rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.work-stats {
    display: inline-flex;
    align-items: center;
    gap: 14px;
}

.stat-item-mini {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12.5px;
    font-weight: 500;
    color: #8A8680;
    font-variant-numeric: tabular-nums;
    cursor: pointer;
    transition: color 0.15s ease;
}

.stat-item-mini:hover {
    color: #FF6B00;
}

.stat-item-mini svg {
    color: inherit;
}

.btn-view-work {
    height: 30px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid rgba(0, 0, 0, 0.08);
    background: #FAF7F2;
    color: #333;
    font-size: 12.5px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    font-family: inherit;
    white-space: nowrap;
}

.btn-view-work:hover {
    background: #111;
    color: #FFF;
    border-color: #111;
}

.btn-view-work:active {
    transform: scale(0.95);
}

/* -------- 响应式适配 -------- */
@media (max-width: 1024px) {
    .works-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .hero-card {
        padding: 36px 32px;
    }
}

@media (max-width: 640px) {
    .works-grid {
        grid-template-columns: 1fr;
    }
    .hero-card {
        padding: 28px 22px;
        border-radius: 14px;
        margin-bottom: 32px;
    }
    .hero-card-title {
        font-size: 40px;
    }
    .works-header {
        align-items: flex-start;
        flex-direction: column;
    }
}


/* 下载次数统计 */
.app-modal-download-stats {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin-top: 12px;
    color: #6e6e73;
    font-size: 14px;
    line-height: 1;
}

.app-modal-download-stats[hidden] {
    display: none;
}

.app-modal-download-stats strong {
    color: #1d1d1f;
    font-weight: 700;
}


/* Full-size project screenshot viewer */
.screenshots-scroll img {
    cursor: zoom-in;
}

.image-lightbox {
    position: fixed;
    inset: 0;
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    overscroll-behavior: contain;
}

.image-lightbox.open {
    display: flex;
}

.image-lightbox img {
    display: block;
    width: auto;
    height: auto;
    max-width: 96vw;
    max-height: 92vh;
    object-fit: contain;
    border-radius: 16px;
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.image-lightbox-close {
    position: fixed;
    top: max(20px, env(safe-area-inset-top));
    right: max(20px, env(safe-area-inset-right));
    z-index: 1;
    display: grid;
    place-items: center;
    width: 48px;
    height: 48px;
    padding: 0;
    color: #fff;
    background: rgba(44, 44, 46, 0.82);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    cursor: pointer;
}

@media (max-width: 640px) {
    .image-lightbox {
        padding: 12px;
    }

    .image-lightbox img {
        max-width: 100%;
        max-height: 88vh;
        border-radius: 10px;
    }
}