:root {
    --qt-primary: #6366F1;
    --qt-secondary: #4F46E5;
    --qt-accent: #F472B6;
    --qt-text: #1E1B4B;
    --qt-text-secondary: #6B7280;
    --qt-bg: #FAFBFF;
    --qt-bg-dark: #0F0E2A;
    --qt-border: #E0E7FF;
    --qt-shadow: rgba(99, 102, 241, 0.1);
    --qt-gradient-start: #6366F1;
    --qt-gradient-end: #A855F7;
    --qt-glass-bg: rgba(255, 255, 255, 0.2);
    --qt-glass-border: rgba(255, 255, 255, 0.3);
    --qt-elastic: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --qt-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--qt-text);
    background-color: var(--qt-bg);
    overflow-x: hidden;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 6rem);
    line-height: 1.05;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--qt-text);
}

h2 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    line-height: 1.1;
    font-weight: 700;
    color: var(--qt-text);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    line-height: 1.2;
    font-weight: 600;
    color: var(--qt-text);
}

h4 {
    font-size: clamp(1.125rem, 2vw, 1.5rem);
    line-height: 1.3;
    font-weight: 600;
}

h5 {
    font-size: 1.125rem;
    font-weight: 600;
}

p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--qt-text-secondary);
}

a {
    text-decoration: none;
    color: var(--qt-primary);
    transition: color 0.3s var(--qt-elastic);
}

a:hover {
    color: var(--qt-secondary);
}

img {
    max-width: 100%;
    height: auto;
}

.qt-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 80px;
    transition: all 0.4s var(--qt-elastic);
    background: transparent;
}

.qt-header-scrolled {
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border-bottom: 1px solid var(--qt-glass-border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.05);
}

.qt-header-inner {
    max-width: 1400px;
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 2rem;
    position: relative;
}

.qt-nav-left,
.qt-nav-right {
    flex: 1;
    display: flex;
    justify-content: space-around;
    align-items: center;
}

.qt-nav-link {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--qt-text);
    padding: 0.5rem 0;
    position: relative;
    font-weight: 500;
    transition: color 0.3s var(--qt-elastic);
}

.qt-header:not(.qt-header-scrolled) .qt-nav-link {
    color: #fff;
    text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.qt-nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--qt-primary);
    transition: width 0.3s var(--qt-elastic);
}

.qt-nav-link:hover::after,
.qt-nav-active::after {
    width: 100%;
}

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

.qt-logo-center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.qt-logo-link {
    display: flex;
    align-items: center;
}

.qt-logo-img {
    height: 48px;
    width: auto;
    transition: transform 0.4s var(--qt-elastic);
}

.qt-logo-img:hover {
    transform: scale(1.05);
}

.qt-mobile-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    position: absolute;
    right: 1.5rem;
    z-index: 1001;
}

.qt-mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--qt-text);
    margin: 3px 0;
    transition: all 0.3s var(--qt-elastic);
    border-radius: 2px;
}

.qt-header:not(.qt-header-scrolled) .qt-mobile-toggle span {
    background: #fff;
}

.qt-mobile-toggle.qt-active span:nth-child(1) {
    transform: rotate(45deg) translate(4px, 4px);
}

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

.qt-mobile-toggle.qt-active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
}

.qt-mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    z-index: 999;
    transform: translateX(100%);
    transition: transform 0.4s var(--qt-elastic);
    display: flex;
    align-items: center;
    justify-content: center;
}

.qt-mobile-menu.qt-menu-open {
    transform: translateX(0);
}

.qt-mobile-menu-inner {
    text-align: center;
}

.qt-mobile-link {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--qt-text);
    padding: 1rem 2rem;
    transition: all 0.3s var(--qt-elastic);
}

.qt-mobile-link:hover,
.qt-mobile-active {
    color: var(--qt-primary);
    transform: scale(1.05);
}

.qt-mobile-phone {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2rem;
    padding: 1rem 2rem;
    background: var(--qt-primary);
    color: #fff;
    border-radius: 50px;
    font-weight: 600;
}

.qt-main-content {
    min-height: 100vh;
}

.qt-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.qt-hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.qt-hero-slide {
    position: absolute;
    inset: 0;
    opacity: 0;
    transition: opacity 1s ease;
}

.qt-hero-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.qt-hero-active {
    opacity: 1;
}

.qt-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 14, 42, 0.7) 0%, rgba(99, 102, 241, 0.4) 100%);
    z-index: 1;
}

.qt-hero-content {
    position: relative;
    z-index: 2;
    width: 100%;
    padding: 6rem 0;
}

.qt-hero-text {
    max-width: 700px;
}

.qt-hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    color: #fff;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    letter-spacing: 0.05em;
}

.qt-hero-title {
    color: #fff;
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.qt-hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.qt-hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.qt-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: all 0.4s var(--qt-elastic);
    text-decoration: none;
}

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

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

.qt-btn-primary {
    background: linear-gradient(135deg, var(--qt-gradient-start), var(--qt-gradient-end));
    color: #fff;
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
}

.qt-btn-primary:hover {
    box-shadow: 0 12px 35px rgba(99, 102, 241, 0.4);
    color: #fff;
}

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

.qt-btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #fff;
    color: #fff;
}

.qt-btn-lg {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

.qt-btn-block {
    display: flex;
    width: 100%;
    justify-content: center;
}

.qt-hero-trust {
    display: flex;
    gap: 2.5rem;
}

.qt-trust-item {
    text-align: center;
}

.qt-trust-num {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
}

.qt-trust-label {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
}

.qt-hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    animation: qt-bounce 2s infinite;
}

.qt-hero-scroll i {
    display: block;
    font-size: 1.5rem;
    margin-top: 0.5rem;
}

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

.breathe-lg {
    padding: 15vh 0;
}

.breathe-md {
    padding: 10vh 0;
}

.breathe-sm {
    padding: 5vh 0;
}

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

.qt-section-header-light .qt-section-title,
.qt-section-header-light .qt-section-desc {
    color: #fff;
}

.qt-section-tag {
    display: inline-block;
    padding: 0.375rem 1.25rem;
    background: linear-gradient(135deg, var(--qt-primary), var(--qt-accent));
    color: #fff;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.qt-section-title {
    margin-bottom: 1rem;
}

.qt-section-desc {
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto;
}

.qt-glass {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
}

.qt-hover-depth {
    perspective: 1000px;
    transition: all 0.4s var(--qt-elastic);
}

.qt-hover-depth:hover {
    transform: perspective(1000px) translateZ(20px) translateY(-4px);
    box-shadow: 0 20px 40px rgba(99, 102, 241, 0.15);
}

.qt-dynamic-text {
    position: relative;
    overflow: hidden;
}

.qt-dynamic-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--qt-bg) 0%, #EEF2FF 100%);
    z-index: 0;
}

.qt-dynamic-text .container {
    position: relative;
    z-index: 1;
}

.qt-dynamic-display {
    text-align: center;
    margin-bottom: 4rem;
}

.qt-dynamic-main {
    margin-bottom: 2rem;
}

.qt-dynamic-word {
    font-size: clamp(3rem, 10vw, 8rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--qt-primary), var(--qt-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
    position: relative;
}

.qt-dynamic-word::after {
    content: '|';
    -webkit-text-fill-color: var(--qt-primary);
    animation: qt-blink 1s step-end infinite;
    margin-left: 4px;
}

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

.qt-dynamic-list {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.qt-dynamic-item {
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--qt-text-secondary);
    border: 1px solid var(--qt-border);
    transition: all 0.4s var(--qt-elastic);
}

.qt-dynamic-active {
    background: var(--qt-primary);
    color: #fff;
    border-color: var(--qt-primary);
    transform: scale(1.1);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

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

.qt-feature-card {
    padding: 2.5rem;
    text-align: center;
    transition: all 0.4s var(--qt-elastic);
}

.qt-feature-card.qt-animate-in {
    opacity: 1;
    transform: translateY(0);
}

.qt-feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--qt-primary), var(--qt-accent));
    border-radius: 16px;
    color: #fff;
    font-size: 1.5rem;
}

.qt-feature-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.qt-feature-card p {
    font-size: 0.95rem;
}

.qt-split-section {
    overflow: hidden;
}

.qt-split-text {
    padding: 4rem;
}

.qt-split-inner {
    max-width: 560px;
}

.qt-split-inner .qt-section-tag {
    margin-bottom: 1rem;
}

.qt-split-title {
    margin-bottom: 1.5rem;
    font-size: clamp(1.75rem, 4vw, 2.75rem);
}

.qt-split-desc {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: var(--qt-text-secondary);
}

.qt-split-detail {
    margin-bottom: 2rem;
}

.qt-split-image {
    height: 100%;
    min-height: 500px;
    overflow: hidden;
}

.qt-split-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--qt-smooth);
}

.qt-split-image:hover .qt-split-img {
    transform: scale(1.03);
}

.qt-service-list {
    list-style: none;
    margin-bottom: 2rem;
}

.qt-service-list li {
    padding: 0.75rem 0;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--qt-border);
}

.qt-service-list li:last-child {
    border-bottom: none;
}

.qt-service-list i {
    color: var(--qt-primary);
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.qt-stats-section {
    position: relative;
    overflow: hidden;
}

.qt-stats-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--qt-bg-dark) 0%, #1E1B4B 50%, #312E81 100%);
    z-index: 0;
}

.qt-stats-section .container {
    position: relative;
    z-index: 1;
}

.qt-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.qt-stat-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.qt-stat-icon {
    font-size: 2rem;
    color: var(--qt-accent);
    margin-bottom: 1rem;
}

.qt-stat-number {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    color: #fff;
    display: inline;
}

.qt-stat-suffix {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--qt-accent);
}

.qt-stat-label {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.7);
}

.qt-physics-section {
    background: linear-gradient(180deg, var(--qt-bg) 0%, #EEF2FF 100%);
}

.qt-physics-container {
    position: relative;
    height: 400px;
    background: linear-gradient(135deg, #EEF2FF, #E0E7FF);
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--qt-border);
    cursor: grab;
}

.qt-physics-item {
    position: absolute;
    width: 70px;
    height: 70px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 16px;
    cursor: grab;
    transition: box-shadow 0.3s;
    user-select: none;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.1);
}

.qt-physics-item i {
    font-size: 1.5rem;
    color: var(--qt-primary);
}

.qt-physics-item[data-label]::after {
    content: attr(data-label);
    font-size: 0.65rem;
    color: var(--qt-text-secondary);
    margin-top: 2px;
}

.qt-physics-dragging {
    cursor: grabbing;
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.3);
    z-index: 10;
}

.qt-services-section {
    background: var(--qt-bg);
}

.qt-process-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}

.qt-process-card {
    padding: 2rem 1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.qt-process-step {
    font-size: 3rem;
    font-weight: 900;
    color: rgba(99, 102, 241, 0.1);
    position: absolute;
    top: 0.5rem;
    right: 1rem;
}

.qt-process-icon {
    font-size: 2rem;
    color: var(--qt-primary);
    margin-top: 1rem;
    opacity: 0.5;
}

.qt-process-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    color: var(--qt-primary);
}

.qt-process-card p {
    font-size: 0.9rem;
}

.qt-safety-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.qt-safety-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: rgba(99, 102, 241, 0.05);
    border-radius: 12px;
    transition: all 0.3s var(--qt-elastic);
}

.qt-safety-item:hover {
    background: rgba(99, 102, 241, 0.1);
    transform: translateX(5px);
}

.qt-safety-item i {
    font-size: 1.5rem;
    color: var(--qt-primary);
}

.qt-safety-item span {
    font-weight: 500;
    font-size: 0.95rem;
}

.qt-news-section {
    background: #F5F3FF;
}

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

.qt-news-card {
    overflow: hidden;
    transition: all 0.4s var(--qt-elastic);
}

.qt-news-img-wrap {
    height: 200px;
    overflow: hidden;
}

.qt-news-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s var(--qt-smooth);
}

.qt-news-card:hover .qt-news-img-wrap img {
    transform: scale(1.08);
}

.qt-news-body {
    padding: 1.5rem;
}

.qt-news-body time {
    font-size: 0.8rem;
    color: var(--qt-text-secondary);
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-bottom: 0.75rem;
}

.qt-news-body h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.qt-news-body p {
    font-size: 0.9rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 1rem;
}

.qt-news-more {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--qt-primary);
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.qt-news-more:hover {
    gap: 0.75rem;
}

.qt-city-section {
    background: var(--qt-bg);
}

.qt-city-current h3 {
    font-size: 1.25rem;
    color: var(--qt-text);
}

.qt-city-current strong {
    color: var(--qt-primary);
}

.qt-city-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 0.75rem;
}

.qt-city-card {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 0.5rem;
    background: #fff;
    border: 1px solid var(--qt-border);
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s var(--qt-elastic);
}

.qt-city-card h5 {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--qt-text);
    margin: 0;
}

.qt-city-card:hover {
    background: var(--qt-primary);
    border-color: var(--qt-primary);
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.2);
}

.qt-city-card:hover h5 {
    color: #fff;
}

.qt-cta-section {
    position: relative;
    overflow: hidden;
}

.qt-cta-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--qt-bg-dark) 0%, #312E81 100%);
}

.qt-cta-section .container {
    position: relative;
    z-index: 1;
}

.qt-cta-content {
    text-align: center;
    padding: 4rem 3rem;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.qt-cta-title {
    color: #fff;
    margin-bottom: 1rem;
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

.qt-cta-desc {
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.125rem;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

.qt-cta-actions {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.qt-footer {
    background: var(--qt-bg-dark);
    color: rgba(255, 255, 255, 0.8);
}

.qt-footer-top {
    padding: 5rem 0 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.qt-footer-logo {
    height: 40px;
    margin-bottom: 1.5rem;
}

.qt-footer-desc {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.qt-footer-social {
    display: flex;
    gap: 1rem;
}

.qt-footer-social a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: #fff;
    font-size: 1.125rem;
    transition: all 0.3s var(--qt-elastic);
}

.qt-footer-social a:hover {
    background: var(--qt-primary);
    transform: scale(1.1);
}

.qt-footer-title {
    color: #fff;
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.qt-footer-links {
    list-style: none;
}

.qt-footer-links li {
    margin-bottom: 0.75rem;
}

.qt-footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    transition: all 0.3s var(--qt-elastic);
}

.qt-footer-links a:hover {
    color: var(--qt-accent);
    padding-left: 5px;
}

.qt-footer-contact p {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

.qt-footer-contact i {
    color: var(--qt-primary);
}

.qt-footer-qrcode {
    text-align: center;
    margin-top: 1.5rem;
}

.qt-qr-img {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.qt-footer-qrcode span {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

.qt-footer-middle {
    padding: 2rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.qt-friend-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
}

.qt-friend-links a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
    transition: color 0.3s;
}

.qt-friend-links a:hover {
    color: var(--qt-accent);
}

.qt-sitemap-links a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;
    margin: 0 0.5rem;
}

.qt-sitemap-links span {
    color: rgba(255, 255, 255, 0.3);
}

.qt-footer-bottom {
    padding: 1.5rem 0;
}

.qt-footer-copyright {
    text-align: center;
}

.qt-footer-copyright p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    margin: 0;
}

.qt-back-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: var(--qt-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.4s var(--qt-elastic);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
    z-index: 999;
}

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

.qt-back-top:hover {
    transform: translateY(-5px) scale(1.1);
}

.qt-page-banner {
    position: relative;
    padding: 10rem 0 5rem;
    overflow: hidden;
}

.qt-page-banner-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--qt-bg-dark) 0%, #312E81 100%);
}

.qt-page-banner-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.qt-page-banner-content h1 {
    color: #fff;
    font-size: clamp(2rem, 5vw, 3.5rem);
    margin-bottom: 1rem;
}

.qt-page-banner-content p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.125rem;
}

.qt-breadcrumb {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    list-style: none;
    margin-top: 1.5rem;
    padding: 0;
}

.qt-breadcrumb li {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

.qt-breadcrumb li::after {
    content: '/';
    margin-left: 0.5rem;
}

.qt-breadcrumb li:last-child::after {
    display: none;
}

.qt-breadcrumb li.active {
    color: var(--qt-accent);
}

.qt-breadcrumb a {
    color: rgba(255, 255, 255, 0.7);
}

.qt-breadcrumb a:hover {
    color: #fff;
}

.qt-news-list-section {
    background: var(--qt-bg);
}

.qt-list-card {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    margin-bottom: 2rem;
    overflow: hidden;
}

.qt-list-img {
    flex-shrink: 0;
    border-radius: 12px;
    overflow: hidden;
}

.qt-list-img img {
    width: 280px;
    height: 180px;
    object-fit: cover;
    transition: transform 0.4s var(--qt-smooth);
}

.qt-list-card:hover .qt-list-img img {
    transform: scale(1.05);
}

.qt-list-body h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.qt-list-body h3 a {
    color: var(--qt-text);
    transition: color 0.3s;
}

.qt-list-body h3 a:hover {
    color: var(--qt-primary);
}

.qt-list-body p {
    font-size: 0.95rem;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.qt-list-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.qt-tag {
    padding: 0.25rem 0.75rem;
    background: rgba(99, 102, 241, 0.08);
    color: var(--qt-primary);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
}

.qt-list-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--qt-text-secondary);
}

.qt-list-read {
    color: var(--qt-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

.qt-sidebar {
    position: sticky;
    top: 100px;
}

.qt-sidebar-card {
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.qt-sidebar-title {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--qt-primary);
}

.qt-sidebar-recommend {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.qt-recommend-item {
    display: flex;
    gap: 1rem;
    align-items: center;
    padding: 0.75rem;
    border-radius: 10px;
    transition: all 0.3s var(--qt-elastic);
}

.qt-recommend-item:hover {
    background: rgba(99, 102, 241, 0.05);
}

.qt-recommend-item img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
}

.qt-recommend-item span {
    font-size: 0.9rem;
    color: var(--qt-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.qt-sidebar-contact p {
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.qt-pagination {
    margin-top: 3rem;
    text-align: center;
}

.qt-detail-section {
    background: var(--qt-bg);
}

.qt-detail-article {
    padding: 3rem;
    margin-bottom: 3rem;
}

.qt-detail-header {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--qt-border);
}

.qt-detail-header h1 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    margin-bottom: 1.5rem;
}

.qt-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--qt-text-secondary);
}

.qt-detail-meta span {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
}

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

.content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--qt-text);
}

.content img {
    max-width: 100%;
    border-radius: 12px;
    margin: 1.5rem 0;
}

.content p {
    margin-bottom: 1.5rem;
    color: var(--qt-text);
}

.content h2, .content h3, .content h4 {
    margin: 2rem 0 1rem;
}

.qt-detail-footer {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--qt-border);
}

.qt-detail-share {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.qt-detail-share span {
    font-size: 0.9rem;
    color: var(--qt-text-secondary);
}

.qt-detail-share a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 50%;
    color: var(--qt-primary);
    transition: all 0.3s var(--qt-elastic);
}

.qt-detail-share a:hover {
    background: var(--qt-primary);
    color: #fff;
    transform: scale(1.1);
}

.qt-related-articles {
    margin-top: 3rem;
}

.qt-related-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.qt-related-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.qt-related-card {
    padding: 1.5rem;
    display: block;
}

.qt-related-card h4 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--qt-text);
    line-height: 1.4;
}

.qt-related-more {
    font-size: 0.85rem;
    color: var(--qt-primary);
    font-weight: 500;
}

.qt-about-intro {
    background: var(--qt-bg);
}

.qt-about-text .qt-section-tag {
    margin-bottom: 1rem;
}

.qt-about-text h2 {
    margin-bottom: 1.5rem;
}

.qt-about-desc {
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.qt-about-image {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.15);
}

.qt-about-img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.qt-about-values {
    background: #F5F3FF;
}

.qt-values-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.qt-value-card {
    padding: 2.5rem 2rem;
    text-align: center;
}

.qt-value-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--qt-primary), var(--qt-accent));
    border-radius: 20px;
    color: #fff;
    font-size: 1.75rem;
}

.qt-value-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.qt-value-card p {
    font-size: 0.9rem;
}

.qt-about-timeline {
    background: var(--qt-bg);
}

.qt-timeline {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    position: relative;
}

.qt-timeline::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: linear-gradient(90deg, var(--qt-primary), var(--qt-accent));
    border-radius: 3px;
}

.qt-timeline-item {
    padding: 2rem 1.5rem;
    text-align: center;
    position: relative;
}

.qt-timeline-year {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    background: var(--qt-primary);
    color: #fff;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.qt-timeline-item h4 {
    margin-bottom: 0.5rem;
    color: var(--qt-text);
}

.qt-timeline-item p {
    font-size: 0.875rem;
}

.qt-about-contact {
    background: #F5F3FF;
}

.qt-about-contact-card {
    padding: 3rem;
    background: linear-gradient(135deg, var(--qt-primary), var(--qt-secondary));
    border: none;
}

.qt-about-contact-card h3 {
    color: #fff;
    margin-bottom: 0.5rem;
}

.qt-about-contact-card p {
    color: rgba(255, 255, 255, 0.8);
}

.qt-contact-section {
    background: var(--qt-bg);
}

.qt-contact-info h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.qt-contact-intro {
    font-size: 1.05rem;
    margin-bottom: 2rem;
}

.qt-contact-items {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.qt-contact-item {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem;
}

.qt-contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--qt-primary), var(--qt-accent));
    border-radius: 12px;
    color: #fff;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.qt-contact-item h4 {
    font-size: 0.85rem;
    color: var(--qt-text-secondary);
    margin-bottom: 0.25rem;
    font-weight: 500;
}

.qt-contact-item p {
    font-size: 1rem;
    color: var(--qt-text);
    font-weight: 600;
    margin: 0;
}

.qt-contact-qr {
    text-align: center;
}

.qt-qr-img-lg {
    width: 140px;
    height: 140px;
    border-radius: 12px;
    border: 3px solid var(--qt-border);
    margin-bottom: 0.75rem;
}

.qt-contact-qr span {
    display: block;
    font-size: 0.85rem;
    color: var(--qt-text-secondary);
}

.qt-contact-form-wrap {
    padding: 3rem;
}

.qt-contact-form-wrap h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.qt-contact-form-wrap > p {
    margin-bottom: 2rem;
}

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

.qt-form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--qt-text);
    margin-bottom: 0.5rem;
}

.qt-form-group label span {
    color: var(--qt-accent);
}

.qt-form-group input,
.qt-form-group select,
.qt-form-group textarea {
    width: 100%;
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--qt-border);
    border-radius: 12px;
    font-size: 1rem;
    color: var(--qt-text);
    background: rgba(255, 255, 255, 0.8);
    transition: all 0.3s var(--qt-elastic);
    outline: none;
}

.qt-form-group input:focus,
.qt-form-group select:focus,
.qt-form-group textarea:focus {
    border-color: var(--qt-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
}

.qt-form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.qt-form-message {
    margin-top: 1rem;
    display: none;
}

.qt-msg-success {
    color: #059669;
    font-weight: 500;
}

.qt-msg-error {
    color: #DC2626;
    font-weight: 500;
}

.qt-animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s var(--qt-elastic);
}

.qt-animate-in.qt-visible {
    opacity: 1;
    transform: translateY(0);
}

.qt-menu-lock {
    overflow: hidden;
}

@media (max-width: 991px) {
    .qt-nav-left,
    .qt-nav-right {
        display: none;
    }

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

    .qt-logo-center {
        position: relative;
        left: auto;
        transform: none;
    }

    .qt-header-inner {
        justify-content: space-between;
    }

    .qt-dynamic-features {
        grid-template-columns: 1fr;
    }

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

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

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

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

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

    .qt-timeline::before {
        display: none;
    }

    .qt-split-text {
        padding: 3rem 2rem;
    }

    .qt-split-image {
        min-height: 300px;
    }

    .qt-related-grid {
        grid-template-columns: 1fr;
    }

    .qt-list-card {
        flex-direction: column;
    }

    .qt-list-img img {
        width: 100%;
        height: 200px;
    }
}

@media (max-width: 767px) {
    .qt-hero {
        min-height: 100svh;
    }

    .qt-hero-text {
        text-align: center;
    }

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

    .qt-hero-trust {
        justify-content: center;
    }

    .qt-btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }

    .qt-btn-lg {
        padding: 1rem 2rem;
    }

    .qt-split-section .row {
        flex-direction: column-reverse;
    }

    .qt-split-image {
        min-height: 250px;
    }

    .qt-split-text {
        padding: 2rem 1.5rem;
    }

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

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

    .qt-news-grid {
        grid-template-columns: 1fr;
    }

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

    .qt-values-grid {
        grid-template-columns: 1fr;
    }

    .qt-timeline {
        grid-template-columns: 1fr;
    }

    .qt-cta-content {
        padding: 2.5rem 1.5rem;
    }

    .qt-cta-actions {
        flex-direction: column;
        align-items: center;
    }

    .qt-detail-article {
        padding: 1.5rem;
    }

    .qt-contact-form-wrap {
        padding: 2rem 1.5rem;
    }

    .qt-page-banner {
        padding: 8rem 0 3rem;
    }

    .breathe-lg {
        padding: 8vh 0;
    }

    .breathe-md {
        padding: 6vh 0;
    }

    .breathe-sm {
        padding: 4vh 0;
    }

    .qt-physics-container {
        height: 300px;
    }

    .qt-physics-item {
        width: 55px;
        height: 55px;
    }

    .qt-about-contact-card {
        padding: 2rem;
    }

    .qt-about-contact-card .text-lg-end {
        text-align: center !important;
        margin-top: 1.5rem;
    }
}

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

    .qt-hero-scroll {
        animation: none;
    }

    .qt-hover-depth:hover {
        transform: none;
    }
}