/* ============================================
   吉娃娃生物 - Genewawa
   Professional Peptide Biotech Homepage
   ============================================ */

/* --- CSS Variables --- */
:root {
    --primary: #00C9A7;
    --primary-dark: #00A88A;
    --secondary: #0891B2;
    --secondary-dark: #0E7490;
    --accent: #F59E0B;
    --dark: #0F172A;
    --dark-light: #1E293B;
    --text: #334155;
    --text-light: #64748B;
    --text-lighter: #94A3B8;
    --bg: #FFFFFF;
    --bg-light: #F8FAFC;
    --bg-section: #F1F5F9;
    --border: #E2E8F0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.12);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.15);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-cn: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;
}

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-cn);
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition);
}

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Top Bar --- */
.top-bar {
    background: var(--dark);
    color: rgba(255,255,255,0.7);
    font-size: 13px;
    padding: 6px 0;
}

.top-bar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-links a {
    color: rgba(255,255,255,0.7);
    font-size: 13px;
}

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

.top-links .divider {
    margin: 0 10px;
    opacity: 0.3;
}

/* --- Header --- */
.header {
    background: var(--bg);
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
    position: relative;
    z-index: 100;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 14px;
}

.logo-icon {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-en {
    font-family: var(--font-display);
    font-size: 26px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.logo-cn {
    font-size: 14px;
    color: var(--text-light);
    font-weight: 500;
    letter-spacing: 2px;
}

.header-info {
    text-align: right;
}

.tagline-main {
    display: block;
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    letter-spacing: 1px;
}

.tagline-sub {
    display: block;
    font-size: 12px;
    color: var(--text-light);
    margin-top: 2px;
    letter-spacing: 1px;
}

.header-contact {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    margin-top: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
}

.phone-icon {
    width: 16px;
    height: 16px;
}

/* --- Navigation --- */
.nav {
    background: var(--bg);
    position: sticky;
    top: 0;
    z-index: 999;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}

.nav.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.nav-list {
    display: flex;
    gap: 0;
}

.nav-item a {
    display: block;
    padding: 14px 20px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    position: relative;
    transition: all var(--transition);
}

.nav-item a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 3px 3px 0 0;
    transition: width var(--transition);
}

.nav-item:hover a,
.nav-item.active a {
    color: var(--primary);
}

.nav-item:hover a::after,
.nav-item.active a::after {
    width: 70%;
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    position: absolute;
    right: 0;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    transition: all var(--transition);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

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

.hero-bg canvas {
    width: 100%;
    height: 100%;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0,201,167,0.06) 0%, rgba(8,145,178,0.08) 50%, rgba(255,255,255,0.95) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 60px 0;
}

.hero-left {
    position: relative;
    min-height: 400px;
}

.hero-bubbles {
    position: relative;
    width: 100%;
    height: 100%;
}

.bubble {
    position: absolute;
    background: rgba(255,255,255,0.85);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0,201,167,0.2);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    animation: float 6s ease-in-out infinite;
    box-shadow: 0 4px 24px rgba(0,201,167,0.1);
}

.bubble-1 {
    width: 140px;
    height: 140px;
    top: 10%;
    left: 5%;
    animation-delay: 0s;
}

.bubble-2 {
    width: 120px;
    height: 120px;
    top: 5%;
    right: 15%;
    animation-delay: -2s;
}

.bubble-main {
    width: 180px;
    height: 180px;
    top: 38%;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, rgba(0,201,167,0.15), rgba(8,145,178,0.15));
    border: 2px solid rgba(0,201,167,0.3);
    animation-delay: -1s;
}

.bubble-3 {
    width: 130px;
    height: 130px;
    bottom: 5%;
    left: 15%;
    animation-delay: -3s;
}

.bubble-zh {
    font-size: 14px;
    font-weight: 700;
    color: var(--dark);
}

.bubble-main .bubble-zh {
    font-size: 16px;
}

.bubble-en {
    font-size: 10px;
    color: var(--text-light);
    margin-top: 4px;
}

.bubble-main .bubble-en {
    font-size: 11px;
}

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

.bubble-main {
    animation-name: floatMain;
}

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

.hero-molecule {
    position: absolute;
    top: 0;
    left: 0;
    width: 200px;
    height: 200px;
    opacity: 0.5;
    animation: rotate 30s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.molecule-svg {
    width: 100%;
    height: 100%;
}

.hero-right {
    padding: 20px 0;
}

.hero-title {
    font-size: 32px;
    font-weight: 900;
    color: var(--dark);
    line-height: 1.3;
    margin-bottom: 8px;
}

.hero-subtitle {
    font-size: 14px;
    color: var(--primary);
    font-weight: 500;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.hero-desc {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 28px;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-xl);
    transition: all var(--transition);
    box-shadow: 0 4px 16px rgba(0,201,167,0.3);
}

.hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,201,167,0.4);
}

.hero-btn svg {
    transition: transform var(--transition);
}

.hero-btn:hover svg {
    transform: translateX(4px);
}

.hero-equipment {
    display: flex;
    gap: 16px;
    margin-top: 36px;
}

.equip-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 500;
    color: var(--text);
    transition: all var(--transition);
}

.equip-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.equip-icon {
    width: 36px;
    height: 36px;
    color: var(--primary);
    flex-shrink: 0;
}

.equip-icon svg {
    width: 100%;
    height: 100%;
}

/* --- Keywords Bar --- */
.keywords-bar {
    background: var(--bg-light);
    padding: 14px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    overflow: hidden;
}

.keywords-bar .container {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
}

.kw-label {
    font-weight: 600;
    color: var(--text);
    margin-right: 4px;
}

.keywords-bar a {
    color: var(--secondary);
    transition: color var(--transition);
}

.keywords-bar a:hover {
    color: var(--primary);
}

.kw-sep {
    color: var(--border);
    margin: 0 2px;
}

/* --- Section Common --- */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header.left {
    text-align: left;
}

.section-title {
    font-size: 30px;
    font-weight: 900;
    color: var(--dark);
    margin-bottom: 6px;
}

.section-subtitle {
    font-size: 14px;
    color: var(--text-lighter);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.title-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
    margin: 0 auto;
}

.section-header.left .title-line {
    margin: 0;
}

.section-header.light .section-title {
    color: white;
}

.section-header.light .section-subtitle {
    color: rgba(255,255,255,0.6);
}

/* --- Services Section --- */
.services {
    padding: 80px 0;
    background: var(--bg);
}

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

.service-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: transform var(--transition);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

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

.service-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 20px;
}

.service-icon svg {
    width: 100%;
    height: 100%;
}

.service-card h3 {
    font-size: 22px;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 2px;
}

.service-card > p:nth-of-type(1) {
    font-size: 12px;
    color: var(--text-lighter);
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 14px;
}

.service-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 18px;
}

.service-features {
    margin-bottom: 20px;
}

.service-features li {
    font-size: 13px;
    color: var(--text);
    padding: 5px 0;
    border-bottom: 1px dashed var(--border);
}

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

.service-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all var(--transition);
}

.service-link:hover {
    color: var(--secondary);
    gap: 8px;
}

/* --- Custom Detail Section --- */
.custom-detail {
    padding: 80px 0;
    background: var(--bg-light);
}

.custom-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 48px;
}

.custom-intro h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
}

.custom-intro p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

.custom-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 60px;
}

.custom-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
}

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

.custom-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.custom-card h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.custom-card p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

.custom-process {
    background: var(--bg);
    border-radius: var(--radius-lg);
    padding: 40px;
    border: 1px solid var(--border);
}

.custom-process h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--dark);
    text-align: center;
    margin-bottom: 32px;
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.process-step {
    display: flex;
    align-items: center;
    gap: 12px;
}

.step-num {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 2px;
}

.step-content p {
    font-size: 12px;
    color: var(--text-light);
}

.process-arrow {
    font-size: 24px;
    color: var(--primary);
    font-weight: 700;
}

/* --- Technology Section --- */
.technology {
    padding: 80px 0;
    background: var(--bg-light);
}

.tech-banner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.tech-badge {
    display: inline-block;
    padding: 6px 16px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-xl);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.tech-banner h2 {
    font-size: 28px;
    font-weight: 900;
    color: var(--dark);
    margin-bottom: 4px;
}

.tech-banner > .tech-banner-content > p {
    font-size: 13px;
    color: var(--text-lighter);
    letter-spacing: 1px;
    margin-bottom: 32px;
}

.tech-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.tech-feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.tech-num {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
    width: 60px;
}

.tech-feature h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.tech-feature p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

.tech-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.peptide-chain {
    display: flex;
    align-items: center;
    gap: 0;
    flex-wrap: wrap;
    justify-content: center;
}

.amino-acid {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-md);
    background: var(--bg);
    border: 2px solid var(--color);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    animation: fadeInUp 0.6s ease-out forwards;
    animation-delay: var(--delay);
    opacity: 0;
    transition: all var(--transition);
}

.amino-acid:hover {
    transform: scale(1.15);
    box-shadow: 0 4px 16px rgba(0,201,167,0.3);
}

.amino-acid.modified {
    background: linear-gradient(135deg, rgba(245,158,11,0.1), rgba(239,68,68,0.1));
    border-style: dashed;
}

.aa-letter {
    font-size: 18px;
    font-weight: 800;
    color: var(--color);
    line-height: 1;
}

.aa-name {
    font-size: 9px;
    color: var(--text-lighter);
    margin-top: 2px;
}

.bond {
    width: 16px;
    height: 2px;
    background: var(--border);
    flex-shrink: 0;
}

.peptide-label {
    font-size: 12px;
    color: var(--text-lighter);
    text-align: center;
}

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

/* --- Products Section --- */
.products {
    padding: 80px 0;
    background: var(--bg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.product-card {
    display: grid;
    grid-template-columns: 200px 1fr;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition);
}

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

.product-img {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.product-info {
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.product-info h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 2px;
}

.product-info > p:nth-of-type(1) {
    font-size: 11px;
    color: var(--text-lighter);
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.product-desc {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.7;
}

/* --- Advantages Section --- */
.advantages {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    position: relative;
    overflow: hidden;
}

.advantages::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0,201,167,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.advantages::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(8,145,178,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    position: relative;
    z-index: 1;
}

.advantage-item {
    text-align: center;
    padding: 32px 20px;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    background: rgba(255,255,255,0.03);
    backdrop-filter: blur(10px);
    transition: all var(--transition);
}

.advantage-item:hover {
    background: rgba(255,255,255,0.06);
    border-color: rgba(0,201,167,0.3);
    transform: translateY(-4px);
}

.adv-number {
    font-family: var(--font-display);
    font-size: 42px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), #34D399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: 8px;
}

.adv-label {
    font-size: 16px;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
}

.adv-desc {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    line-height: 1.6;
}

/* --- News Section --- */
.news {
    padding: 80px 0;
    background: var(--bg);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.news-card {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

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

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 70px;
    padding: 12px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-md);
    color: white;
}

.news-day {
    font-size: 28px;
    font-weight: 900;
    line-height: 1;
}

.news-month {
    font-size: 12px;
    margin-top: 4px;
}

.news-content {
    flex: 1;
}

.news-content h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
    line-height: 1.4;
}

.news-content p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 12px;
}

.news-link {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    transition: color var(--transition);
}

.news-link:hover {
    color: var(--secondary);
}

/* --- Tech Knowledge Section --- */
.tech-knowledge {
    padding: 80px 0;
    background: var(--bg-light);
}

.section-desc-text {
    font-size: 15px;
    color: var(--text-light);
    max-width: 800px;
    margin: 16px auto 0;
    line-height: 1.8;
}

.tech-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.tech-tab {
    padding: 10px 24px;
    border: 2px solid var(--border);
    border-radius: var(--radius-xl);
    background: var(--bg);
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font-cn);
}

.tech-tab:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.tech-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-color: transparent;
    color: white;
}

.tech-tab-content {
    display: none;
}

.tech-tab-content.active {
    display: block;
    animation: fadeIn 0.4s ease-out;
}

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

.tech-panel {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
}

.tech-panel h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.tech-intro {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 32px;
}

/* SOP Steps Grid */
.sop-steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.sop-step-card {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--transition);
    position: relative;
}

.sop-step-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.sop-step-num {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 12px;
}

.sop-step-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.sop-step-card p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.7;
}

.tech-sub-section {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.tech-sub-section h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
}

.tech-sub-section p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* Tech Tables */
.tech-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-top: 12px;
}

.tech-table-wrap table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}

.tech-table-wrap thead th {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-weight: 600;
    text-align: left;
    padding: 10px 14px;
    white-space: nowrap;
}

.tech-table-wrap tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.tech-table-wrap tbody tr:nth-child(even) {
    background: var(--bg-light);
}

.tech-table-wrap tbody tr:hover {
    background: rgba(0,201,167,0.05);
}

.tech-table-wrap .highlight-row {
    background: rgba(0,201,167,0.08) !important;
    font-weight: 600;
}

/* Modification Cards */
.modify-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

.modify-card {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all var(--transition);
}

.modify-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.modify-badge {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: var(--radius-xl);
    margin-bottom: 12px;
}

.modify-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.modify-card p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

.modify-types-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.modify-type {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    transition: all var(--transition);
}

.modify-type:hover {
    border-color: var(--primary);
}

.modify-type h5 {
    font-size: 14px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
}

.modify-type p {
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.6;
}

/* Difficulty Cards */
.difficulty-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.difficulty-card {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: all var(--transition);
}

.difficulty-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.difficulty-icon {
    font-size: 28px;
    margin-bottom: 12px;
}

.difficulty-card h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 8px;
}

.difficulty-card > p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 14px;
}

.difficulty-solutions {
    background: rgba(0,201,167,0.05);
    border: 1px solid rgba(0,201,167,0.15);
    border-radius: var(--radius-sm);
    padding: 14px;
}

.difficulty-solutions strong {
    display: block;
    font-size: 13px;
    color: var(--primary);
    margin-bottom: 8px;
}

.difficulty-solutions span {
    display: inline-block;
    font-size: 12px;
    color: var(--text);
    background: var(--bg);
    padding: 4px 10px;
    border-radius: var(--radius-xl);
    margin: 3px 4px 3px 0;
    border: 1px solid var(--border);
}

/* Trend Cards */
.trend-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 32px;
}

.trend-card {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 28px;
    transition: all var(--transition);
    position: relative;
}

.trend-card:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.trend-num {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 12px;
}

.trend-card h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px;
}

.trend-card p {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.7;
}

/* Market Stats */
.trend-market {
    background: linear-gradient(135deg, var(--dark) 0%, var(--dark-light) 100%);
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 32px;
}

.trend-market h4 {
    font-size: 17px;
    font-weight: 700;
    color: white;
    margin-bottom: 20px;
}

.market-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.market-stat {
    text-align: center;
    padding: 16px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-md);
}

.market-num {
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 900;
    background: linear-gradient(135deg, var(--primary), #34D399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: 6px;
}

.market-label {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
    line-height: 1.4;
}

/* Responsive for Tech Section */
@media (max-width: 1024px) {
    .modify-grid {
        grid-template-columns: 1fr;
    }
    .modify-types-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .difficulty-grid {
        grid-template-columns: 1fr;
    }
    .trend-grid {
        grid-template-columns: 1fr;
    }
    .market-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .tech-panel {
        padding: 24px 18px;
    }
    .sop-steps-grid {
        grid-template-columns: 1fr;
    }
    .modify-types-grid {
        grid-template-columns: 1fr;
    }
    .market-stats {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    .tech-tabs {
        gap: 6px;
    }
    .tech-tab {
        padding: 8px 16px;
        font-size: 13px;
    }
}

/* --- About Section --- */
.about {
    padding: 80px 0;
    background: var(--bg-light);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-top: 24px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    transition: all var(--transition);
}

.highlight-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.highlight-icon {
    width: 20px;
    height: 20px;
    color: var(--primary);
    flex-shrink: 0;
}

.highlight-icon svg {
    width: 100%;
    height: 100%;
}

.about-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.about-card-stack {
    position: relative;
    width: 360px;
    height: 380px;
}

.about-card {
    position: absolute;
    width: 260px;
    padding: 28px;
    background: var(--bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
}

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

.card-1 {
    top: 0;
    left: 0;
    z-index: 3;
    border-top: 4px solid var(--primary);
}

.card-2 {
    top: 80px;
    right: 0;
    z-index: 2;
    border-top: 4px solid var(--secondary);
}

.card-3 {
    bottom: 0;
    left: 40px;
    z-index: 1;
    border-top: 4px solid var(--accent);
}

.card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.about-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}

.about-card p {
    font-size: 13px;
    color: var(--text-light);
}

/* --- Contact Section --- */
.contact {
    padding: 80px 0;
    background: var(--bg);
}

.contact-info-full {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, rgba(0,201,167,0.1), rgba(8,145,178,0.1));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--primary);
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

.contact-item h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 2px;
}

.contact-item p {
    font-size: 14px;
    color: var(--text-light);
}

.qr-section {
    display: flex;
    gap: 24px;
    margin-top: 16px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.qr-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.qr-img {
    width: 120px;
    height: 120px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px;
    background: var(--bg);
    object-fit: contain;
}

.qr-item span {
    font-size: 13px;
    color: var(--text-light);
    font-weight: 500;
}

.contact-form {
    background: var(--bg-light);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
}

.contact-form h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
}

.contact-form > p {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-cn);
    color: var(--text);
    background: var(--bg);
    transition: all var(--transition);
    margin-bottom: 12px;
    outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0,201,167,0.1);
}

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

.contact-form textarea {
    resize: vertical;
    min-height: 100px;
}

.submit-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 600;
    font-family: var(--font-cn);
    cursor: pointer;
    transition: all var(--transition);
}

.submit-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(0,201,167,0.3);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* --- Footer --- */
.footer {
    background: var(--dark);
    color: rgba(255,255,255,0.6);
    padding: 48px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 36px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    margin-bottom: 12px;
}

.footer-logo-en {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 900;
    color: white;
    line-height: 1.2;
}

.footer-logo-cn {
    font-size: 13px;
    color: var(--primary);
    letter-spacing: 2px;
}

.footer-about {
    font-size: 13px;
    line-height: 1.7;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul li a {
    font-size: 13px;
    color: rgba(255,255,255,0.5);
    transition: color var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary);
}

.footer-contact li {
    font-size: 13px;
    display: flex;
    align-items: flex-start;
    gap: 4px;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 12px;
    color: rgba(255,255,255,0.3);
}

.footer-icp {
    margin-top: 4px;
}

/* --- Floating Contact --- */
.floating-contact {
    position: fixed;
    bottom: 80px;
    right: 24px;
    z-index: 999;
}

.float-btn {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(0,201,167,0.4);
    transition: all var(--transition);
    color: white;
}

.float-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 24px rgba(0,201,167,0.5);
}

.float-btn svg {
    width: 24px;
    height: 24px;
}

.float-panel {
    position: absolute;
    bottom: 64px;
    right: 0;
    width: 220px;
    background: var(--bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    padding: 20px;
    text-align: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
}

.float-panel.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.float-panel h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 6px;
}

.float-panel > p {
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 14px;
}

.float-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.float-qr-img {
    width: 120px;
    height: 120px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 8px;
    background: var(--bg);
    object-fit: contain;
}

.float-qr span {
    font-size: 12px;
    color: var(--text-light);
}

/* --- Back to Top --- */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 44px;
    height: 44px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
    color: var(--text);
    z-index: 998;
}

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

.back-to-top:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .hero-left {
        min-height: 300px;
    }
    .services-grid {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin: 0 auto;
    }
    .custom-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tech-banner {
        grid-template-columns: 1fr;
    }
    .news-grid {
        grid-template-columns: 1fr;
    }
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .about-grid {
        grid-template-columns: 1fr;
    }
    .about-visual {
        order: -1;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .top-bar {
        display: none;
    }
    .header-inner {
        flex-direction: column;
        gap: 12px;
    }
    .header-info {
        text-align: center;
    }
    .header-contact {
        justify-content: center;
    }
    .nav-inner {
        justify-content: flex-end;
    }
    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        box-shadow: var(--shadow-lg);
        border-top: 1px solid var(--border);
    }
    .nav-list.active {
        display: flex;
    }
    .nav-item a {
        padding: 14px 24px;
        border-bottom: 1px solid var(--border);
    }
    .mobile-menu-btn {
        display: flex;
    }
    .hero {
        min-height: auto;
    }
    .hero-title {
        font-size: 24px;
    }
    .hero-equipment {
        flex-direction: column;
    }
    .custom-grid {
        grid-template-columns: 1fr;
    }
    .custom-process {
        padding: 24px;
    }
    .process-steps {
        flex-direction: column;
    }
    .process-arrow {
        transform: rotate(90deg);
    }
    .products-grid {
        grid-template-columns: 1fr;
    }
    .product-card {
        grid-template-columns: 120px 1fr;
    }
    .news-card {
        flex-direction: column;
    }
    .news-date {
        flex-direction: row;
        min-width: auto;
        gap: 8px;
    }
    .advantages-grid {
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }
    .adv-number {
        font-size: 32px;
    }
    .about-card-stack {
        width: 100%;
        height: auto;
        display: flex;
        flex-direction: column;
        gap: 16px;
    }
    .about-card {
        position: static;
        width: 100%;
    }
    .about-highlights {
        grid-template-columns: 1fr;
    }
    .qr-section {
        flex-direction: column;
        align-items: center;
    }
    .contact-info-full {
        align-items: stretch;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .bubble {
        transform: scale(0.8);
    }
    .bubble-main {
        transform: scale(0.85) translateX(-50%);
    }
}

@media (max-width: 480px) {
    .hero-bubbles {
        display: none;
    }
    .hero-molecule {
        display: none;
    }
    .hero-left {
        min-height: auto;
    }
    .section-title {
        font-size: 24px;
    }
    .peptide-chain {
        gap: 0;
    }
    .amino-acid {
        width: 44px;
        height: 44px;
    }
    .aa-letter {
        font-size: 14px;
    }
    .bond {
        width: 8px;
    }
}