ul { list-style: none; }

/* ===================== Hero Section ===================== */
.about-hero {
    position: relative;
    min-height: 420px;
    background: linear-gradient(135deg, #0a0f1e 0%, #0d1b3e 40%, #1a1040 70%, #0c1225 100%);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.about-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37,99,235,0.15) 0%, transparent 70%);
    pointer-events: none;
    animation: heroFloat 8s ease-in-out infinite;
}

.about-hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(167,139,250,0.12) 0%, transparent 70%);
    pointer-events: none;
    animation: heroFloat 10s ease-in-out infinite reverse;
}

@keyframes heroFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -20px) scale(1.05); }
}

.about-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 80%, rgba(59,130,246,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(167,139,250,0.08) 0%, transparent 50%);
    opacity: 1;
    pointer-events: none;
}

/* Grid pattern overlay */
.about-hero-bg::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
}

.about-hero-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 70px 20px 40px;
    position: relative;
    z-index: 10;
}

.about-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, rgba(37,99,235,0.2), rgba(167,139,250,0.2));
    border: 1px solid rgba(96,165,250,0.3);
    padding: 10px 24px;
    border-radius: 50px;
    font-size: 14px;
    color: #93c5fd;
    margin-bottom: 24px;
    backdrop-filter: blur(10px);
    animation: badgePulse 3s ease-in-out infinite;
}

@keyframes badgePulse {
    0%, 100% { box-shadow: 0 0 20px rgba(37,99,235,0.1); }
    50% { box-shadow: 0 0 30px rgba(37,99,235,0.2); }
}

.about-hero-badge i {
    color: #fbbf24;
}

.about-hero-content h1 {
    text-align: center;
    font-size: 36px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 12px;
    line-height: 1.3;
    background: linear-gradient(90deg, #fff 0%, #93c5fd 50%, #c4b5fd 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 1px;
}

.about-hero-desc {
    text-align: center;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.7;
    margin-bottom: 28px;
    max-width: 560px;
}

.about-hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 0;
    margin-bottom: 28px;
    flex-wrap: wrap;
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(12px);
    padding: 20px 36px;
    border-radius: 16px;
    border: 1px solid rgba(255,255,255,0.1);
    position: relative;
}

.about-hero-stats::before {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 20px;
    padding: 1px;
    background: linear-gradient(135deg, rgba(96,165,250,0.3), rgba(167,139,250,0.1), rgba(96,165,250,0.3));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.about-stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 0 28px;
}

.about-stat-num {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, #60a5fa, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.about-stat-label {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
    font-weight: 500;
}

.about-stat-divider {
    width: 1px;
    height: 36px;
    background: linear-gradient(180deg, transparent, rgba(255,255,255,0.2), transparent);
}

.about-hero-btns {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.about-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: linear-gradient(135deg, #2563eb, #3b82f6);
    color: #fff;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(37,99,235,0.3);
}

.about-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37,99,235,0.4);
}

.about-btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    background: rgba(255,255,255,0.05);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.about-btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.4);
}

/* ===================== Tab Navigation ===================== */
.about-tab {
    background: rgba(0,0,0,0.3);
    backdrop-filter: blur(10px);
    position: relative;
    z-index: 10;
}

.about-tab-inner {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
}

.about-tab a {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 20px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
}

.about-tab a:hover {
    color: #fff;
    background: rgba(255,255,255,0.05);
}

.about-tab a.active {
    color: #fff;
    background: rgba(37,99,235,0.3);
    border-bottom-color: #2563eb;
}

.about-tab a i {
    font-size: 16px;
}

/* ===================== Main Content ===================== */
.about-main {
    background: #f8fafc;
    padding: 40px 15px 24px;
}

.about-container {
    max-width: 1200px;
    margin: 0 auto;
}

/* ===================== Section Styles ===================== */
.about-section {
    margin-bottom: 12px;
}

.section-header {
    text-align: center;
    margin-bottom: 36px;
}

.section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: #2563eb;
    background: #eff6ff;
    padding: 4px 16px;
    border-radius: 20px;
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.section-header h2 {
    font-size: 28px;
    font-weight: 700;
    color: #111827;
    margin-bottom: 12px;
}

.section-header p {
    font-size: 15px;
    color: #6b7280;
    max-width: 600px;
    margin: 0 auto;
}

/* ===================== Company Intro ===================== */
.about-intro-content {
    background: #fff;
    border-radius: 16px;
    padding: 32px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.intro-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: 32px;
}

@media(min-width: 768px) {
    .intro-main {
        grid-template-columns: 2fr 1fr;
    }
}

.intro-text p {
    font-size: 15px;
    color: #4b5563;
    line-height: 1.8;
    margin-bottom: 16px;
    text-indent: 2em;
}

.intro-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.intro-feature-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: #f8fafc;
    border-radius: 8px;
    font-size: 14px;
    color: #374151;
}

.intro-feature-item i {
    color: #10b981;
    font-size: 16px;
}

.intro-highlight {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 32px;
}

.highlight-card {
    text-align: center;
    padding: 24px 16px;
    background: linear-gradient(135deg, #eff6ff 0%, #f0f4ff 100%);
    border-radius: 12px;
    border: 1px solid #e0e7ff;
}

.highlight-icon {
    width: 56px;
    height: 56px;
    background: #2563eb;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 12px;
}

.highlight-icon i {
    font-size: 24px;
    color: #fff;
}

.highlight-card h4 {
    font-size: 16px;
    color: #111827;
    margin-bottom: 8px;
    font-weight: 600;
}

.highlight-card p {
    font-size: 13px;
    color: #6b7280;
    margin: 0;
    line-height: 1.5;
}

.intro-extra {
    padding-top: 24px;
    border-top: 1px solid #e5e7eb;
}

.intro-extra p {
    font-size: 15px;
    color: #4b5563;
    line-height: 1.8;
    margin-bottom: 16px;
    text-indent: 2em;
}

/* ===================== Products Section ===================== */
.about-section#products {
    background: linear-gradient(180deg, #f0f5ff 0%, #ffffff 100%);
    padding: 32px 32px 40px;
    border-radius: 20px;
    position: relative;
}

.about-section#products .section-header {
    margin-bottom: 28px;
}

@media(max-width: 768px) {
    .about-section#products {
        padding: 20px 16px 28px;
    }
}

/* ===================== Products Grid ===================== */
.products-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media(min-width: 768px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media(min-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .product-card-large {
        grid-column: span 3;
    }
}

.product-card {
    background: #fff;
    border-radius: 16px;
    padding: 28px 24px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    border: 1px solid #eef2f6;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(37,99,235,0.12);
    border-color: #bfdbfe;
}

.product-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.product-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    position: relative;
    overflow: hidden;
}

.product-icon::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
}

.product-icon-purple {
    background: linear-gradient(135deg, #a855f7, #7c3aed);
    color: #fff;
}

.product-card:nth-child(2)::before {
    background: linear-gradient(90deg, #3b82f6, #60a5fa);
}
.product-card:nth-child(3)::before {
    background: linear-gradient(90deg, #f97316, #fb923c);
}
.product-card:nth-child(4)::before {
    background: linear-gradient(90deg, #10b981, #34d399);
}

.product-icon-blue {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #fff;
}

.product-icon-orange {
    background: linear-gradient(135deg, #f97316, #ea580c);
    color: #fff;
}

.product-icon-green {
    background: linear-gradient(135deg, #10b981, #059669);
    color: #fff;
}

.product-badge {
    font-size: 12px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 20px;
    background: #f3f4f6;
    color: #6b7280;
}

.product-card h3 {
    font-size: 20px;
    color: #111827;
    margin-bottom: 12px;
    font-weight: 600;
}

.product-desc {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

.product-models {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.model-tag {
    display: inline-block;
    padding: 6px 14px;
    background: #f3e8ff;
    color: #7c3aed;
    font-size: 12px;
    border-radius: 20px;
    font-weight: 500;
}

/* ===================== Models Showcase ===================== */
.models-showcase {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-bottom: 20px;
}

@media(min-width: 768px) {
    .models-showcase {
        grid-template-columns: repeat(2, 1fr);
    }
}

.models-group {
    background: #f8fafc;
    border-radius: 12px;
    padding: 16px;
    border: 1px solid #e5e7eb;
}

.models-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e5e7eb;
}

.models-region-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 16px;
}

.models-region-tag.domestic {
    background: #dbeafe;
    color: #1d4ed8;
}

.models-region-tag.domestic::before {
    content: '🇨🇳';
}

.models-region-tag.international {
    background: #d1fae5;
    color: #059669;
}

.models-region-tag.international::before {
    content: '🌍';
}

.models-count {
    font-size: 12px;
    color: #9ca3af;
}

.models-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.model-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: #fff;
    border-radius: 8px;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.model-item:hover {
    border-color: #bfdbfe;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.model-logo {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.model-name {
    flex: 1;
    font-size: 14px;
    color: #111827;
    font-weight: 500;
}

.model-badge {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 10px;
    background: #f3f4f6;
    color: #6b7280;
    font-weight: 500;
}

.model-badge.hot {
    background: #fef2f2;
    color: #dc2626;
}

.model-badge.new {
    background: #eff6ff;
    color: #2563eb;
}

.product-features {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.product-feature-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: #6b7280;
}

.product-feature-item i {
    color: #10b981;
    font-size: 14px;
}

.product-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.product-tags span {
    display: inline-block;
    padding: 4px 12px;
    background: #f0f4ff;
    color: #2563eb;
    font-size: 12px;
    border-radius: 20px;
    font-weight: 500;
}

.product-card:nth-child(2) .product-tags span {
    background: #eff6ff;
    color: #2563eb;
}

.product-card:nth-child(3) .product-tags span {
    background: #fff7ed;
    color: #ea580c;
}

.product-card:nth-child(4) .product-tags span {
    background: #ecfdf5;
    color: #059669;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #2563eb;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    margin-top: auto;
    transition: all 0.3s ease;
}

.product-link:hover {
    gap: 10px;
    color: #1d4ed8;
}

/* ===================== Advantages ===================== */
.adv-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

@media(min-width: 768px) {
    .adv-list {
        grid-template-columns: repeat(2, 1fr);
    }
}

.adv-item {
    display: flex;
    gap: 18px;
    background: #fff;
    border-radius: 12px;
    padding: 24px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    border: 1px solid #eef2f6;
}

.adv-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(37,99,235,0.1);
    border-color: #bfdbfe;
}

.adv-num {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    color: #fff;
    font-size: 18px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.adv-body h3 {
    font-size: 17px;
    color: #111827;
    margin-bottom: 6px;
}

.adv-body p {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.7;
    margin: 0;
}

/* ===================== Contact Section ===================== */
.contact-wrapper {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

@media(min-width: 768px) {
    .contact-cards {
        grid-template-columns: repeat(4, 1fr);
    }
}

.contact-card {
    background: #fff;
    border-radius: 14px;
    padding: 24px 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
    border: 1px solid #eef2f6;
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(37,99,235,0.12);
    border-color: #bfdbfe;
}

.contact-card-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.contact-card-icon i {
    font-size: 22px;
    color: #fff;
}

.contact-card h4 {
    font-size: 15px;
    color: #6b7280;
    margin-bottom: 8px;
    font-weight: 500;
}

.contact-card p {
    font-size: 16px;
    color: #111827;
    font-weight: 600;
    margin-bottom: 8px;
}

.contact-card-tip {
    font-size: 12px;
    color: #9ca3af;
}

.contact-cta {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    border-radius: 16px;
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 24px;
}

@media(min-width: 768px) {
    .contact-cta {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
        padding: 40px 48px;
    }
}

.cta-content h3 {
    font-size: 24px;
    color: #fff;
    margin-bottom: 8px;
    font-weight: 600;
}

.cta-content p {
    font-size: 15px;
    color: rgba(255,255,255,0.8);
    margin: 0;
}

.cta-btns {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    justify-content: center;
}

.cta-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: #fff;
    color: #2563eb;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.cta-btn-primary:hover {
    background: #f0f4ff;
    transform: translateY(-2px);
}

.cta-btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.cta-btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.5);
}

/* ===================== API Hero Layout ===================== */
.api-hero-layout {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 20px;
}

@media(min-width: 768px) {
    .api-hero-layout {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
        align-items: stretch;
    }
}

.api-hero-left {
    display: flex;
    flex-direction: column;
}

.api-hero-left h3 {
    font-size: 22px;
    color: #111827;
    margin-bottom: 10px;
    font-weight: 700;
}

.api-hero-left .product-desc {
    font-size: 14px;
    color: #6b7280;
    line-height: 1.7;
    margin-bottom: 18px;
}

.api-stats-row {
    display: flex;
    gap: 24px;
    margin-top: auto;
}

.api-stat {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.api-stat-num {
    font-size: 22px;
    font-weight: 700;
    color: #2563eb;
}

.api-stat-label {
    font-size: 12px;
    color: #9ca3af;
}

/* Code Block */
.api-hero-right {
    display: flex;
    align-items: stretch;
}

.api-code-block {
    width: 100%;
    background: #0f172a;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    display: flex;
    flex-direction: column;
}

.api-code-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 12px 16px;
    background: rgba(255,255,255,0.06);
    flex-shrink: 0;
}

.api-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.api-dot.red { background: #ef4444; }
.api-dot.yellow { background: #f59e0b; }
.api-dot.green { background: #22c55e; }

.api-code-title {
    margin-left: 8px;
    font-size: 12px;
    color: #94a3b8;
}

.api-code {
    padding: 18px 20px;
    margin: 0;
    font-size: 13px;
    line-height: 1.6;
    color: #e2e8f0;
    font-family: 'SF Mono', 'Consolas', monospace;
    overflow-x: auto;
    flex: 1;
}

.api-code code {
    font-family: inherit;
}

.code-kw { color: #c084fc; }
.code-str { color: #86efac; }

/* Models Bar */
.api-models-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding: 14px 16px;
    background: linear-gradient(135deg, #f0f4ff 0%, #eff6ff 100%);
    border-radius: 12px;
    border: 1px solid #e0e7ff;
    overflow: hidden;
}

.api-models-scroll {
    display: flex;
    gap: 8px;
    flex-wrap: nowrap;
    overflow-x: auto;
    flex: 1;
    padding: 2px 0;
    scrollbar-width: none;
}

.api-models-scroll::-webkit-scrollbar { display: none; }

.api-model-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
    flex-shrink: 0;
    transition: transform 0.2s;
}

.api-model-chip:hover {
    transform: scale(1.05);
}

.chip-letter {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: rgba(255,255,255,0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 700;
}

.api-more-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    color: #2563eb;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
    transition: gap 0.3s;
}

.api-more-link:hover {
    gap: 8px;
}

@media(max-width: 640px) {
    .api-stats-row { gap: 16px; }
    .api-stat-num { font-size: 18px; }
    .api-models-bar { flex-direction: column; align-items: flex-start; }
}

/* ===================== Mobile Responsive ===================== */
@media (max-width: 768px) {
    .about-hero {
        min-height: auto;
    }
    
    .about-hero-content {
        padding: 50px 16px 24px;
    }
    
    .about-hero-content h1 {
        font-size: 22px;
    }
    
    .about-hero-desc {
        font-size: 13px;
    }
    
    .about-hero-stats {
        gap: 12px;
        padding: 14px 16px;
    }
    
    .about-stat-num {
        font-size: 18px;
    }
    
    .about-stat-item {
        padding: 0 16px;
    }
    
    .about-tab a {
        padding: 12px 8px;
        font-size: 13px;
    }
    
    .about-tab a i {
        display: none;
    }
    
    .about-main {
        padding: 24px 12px 40px;
    }
    
    .section-header h2 {
        font-size: 22px;
    }
    
    .about-intro-content {
        padding: 20px 16px;
    }
    
    .intro-highlight {
        grid-template-columns: 1fr;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    .contact-cta {
        padding: 24px 20px;
    }
    
    .cta-content h3 {
        font-size: 20px;
    }

    .product-card-large {
        padding: 20px 16px;
    }

    .api-hero-layout {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .api-hero-right {
        overflow: hidden;
    }

    .api-hero-left h3 {
        font-size: 18px;
    }

    .api-hero-left .product-desc {
        font-size: 13px;
        line-height: 1.6;
    }

    .api-stats-row {
        gap: 12px;
    }

    .api-stat-num {
        font-size: 18px;
    }

    .api-stat-label {
        font-size: 11px;
    }

    .api-models-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        padding: 12px;
    }

    .api-models-scroll {
        overflow-x: auto;
        gap: 6px;
        padding: 2px 0;
    }

    .api-model-chip {
        padding: 5px 10px;
        font-size: 11px;
    }

    .api-more-link {
        font-size: 12px;
        justify-content: center;
    }

    .product-features {
        gap: 10px;
    }

    .product-feature-item {
        font-size: 12px;
    }

    .product-link {
        font-size: 13px;
    }

    .products-grid {
        gap: 16px;
    }
}