/* ========================================
   缮阳生物 - 云南缮阳生物科技有限公司
   主样式表
   ======================================== */

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

:root {
    --color-primary: #0d7b6a;
    --color-primary-dark: #095e51;
    --color-primary-light: #4fc3a1;
    --color-primary-bg: #e6f7f2;
    --color-secondary: #1a365d;
    --color-secondary-light: #2a4a7f;
    --color-accent: #38b2ac;
    --color-accent-light: #e6fffa;
    --color-gold: #c9a84c;
    --color-gold-light: #fef9e7;
    --color-text: #2d3748;
    --color-text-light: #4a5568;
    --color-text-muted: #718096;
    --color-bg: #ffffff;
    --color-bg-alt: #f0f7f5;
    --color-bg-dark: #0f2420;
    --color-border: #e2e8f0;
    --color-white: #ffffff;
    --color-black: #000000;
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.10);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

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

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

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

.section {
    padding: 100px 0;
}

.section-alt {
    background: var(--color-bg-alt);
}

/* --- Section Headers --- */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 20px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 50px;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-family);
    border-radius: 50px;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    letter-spacing: 0.02em;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(13, 123, 106, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255,255,255,0.5);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--color-white);
    transform: translateY(-2px);
}

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    padding: 10px 0;
}

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

.navbar.scrolled .nav-link:hover,
.navbar.scrolled .nav-link.active {
    color: var(--color-primary);
}

.navbar.scrolled .logo-text {
    color: var(--color-secondary);
}

.navbar.scrolled .hamburger span {
    background: var(--color-text);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    z-index: 1001;
}

.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.logo-text {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 0.02em;
    transition: var(--transition);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2px;
}

.nav-menu li {
    flex-shrink: 0;
}

.nav-link {
    display: block;
    padding: 8px 13px;
    color: rgba(255,255,255,0.85);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 500;
    border-radius: 50px;
    white-space: nowrap;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-white);
    background: rgba(255,255,255,0.15);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
    padding: 8px;
    background: none;
    border: none;
    outline-offset: 4px;
}

.hamburger:focus-visible {
    outline: 2px solid var(--color-primary-light);
    border-radius: 4px;
}

.hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    border-radius: 2px;
    transition: var(--transition);
}

.hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a3d34 0%, #0d5a4a 30%, #0f6b58 60%, #0a2e28 100%);
    overflow: hidden;
    text-align: center;
    padding: 120px 0 80px;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(79, 195, 161, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(56, 178, 172, 0.12) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(13, 123, 106, 0.2) 0%, transparent 50%);
}

.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    border-radius: 50%;
    background: rgba(255,255,255,0.08);
    animation: float linear infinite;
}

@keyframes float {
    0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-100px) rotate(360deg); opacity: 0; }
}

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    padding: 8px 24px;
    border: 1px solid rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.9);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 50px;
    letter-spacing: 0.15em;
    margin-bottom: 32px;
}

.hero-title {
    margin-bottom: 24px;
}

.hero-title-sub {
    display: block;
    font-size: 1.15rem;
    font-weight: 400;
    color: rgba(255,255,255,0.75);
    letter-spacing: 0.1em;
    margin-bottom: 8px;
}

.hero-title-main {
    display: block;
    font-size: 3.8rem;
    font-weight: 900;
    color: var(--color-white);
    letter-spacing: 0.04em;
    line-height: 1.2;
}

.hero-desc {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.7);
    max-width: 700px;
    margin: 0 auto 40px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    gap: 48px;
    justify-content: center;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: baseline;
    gap: 4px;
    color: var(--color-white);
    flex-direction: column;
    text-align: center;
}

.stat-item > span:first-child {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1;
    color: var(--color-primary-light);
}

.stat-item > span:nth-child(2) {
    font-size: 1rem;
    color: rgba(255,255,255,0.6);
}

.stat-label {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
    margin-top: 4px;
}

.hero-scroll {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.4);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    margin-top: 48px;
    animation: fadeInUp 1s 1.5s backwards;
}

.scroll-indicator {
    width: 2px;
    height: 40px;
    background: rgba(255,255,255,0.2);
    border-radius: 1px;
    position: relative;
    overflow: hidden;
}

.scroll-indicator::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 30%;
    background: var(--color-primary-light);
    border-radius: 1px;
    animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
    0%, 100% { top: 0; }
    50% { top: 70%; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translate(-50%, 20px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

/* ========================================
   ABOUT SECTION
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.about-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.about-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.card-icon {
    width: 56px;
    height: 56px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.card-icon svg {
    width: 28px;
    height: 28px;
}

.about-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 16px;
}

.about-card p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.8;
}

.value-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.value-list li {
    padding: 10px 16px;
    background: var(--color-primary-bg);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--color-text);
    border-left: 3px solid var(--color-primary);
}

/* ========================================
   BUSINESS SECTION
   ======================================== */
.business-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 48px;
}

.business-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.business-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.business-card-img {
    height: 200px;
    overflow: hidden;
    background: var(--color-primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.business-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.business-card-body {
    padding: 28px;
}

.business-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-primary-bg);
    line-height: 1;
    margin-bottom: 8px;
}

.business-card-body h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 12px;
}

.business-card-body > p {
    color: var(--color-text-light);
    font-size: 0.92rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

.business-features {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.business-features li {
    padding: 6px 14px;
    background: var(--color-primary-bg);
    color: var(--color-primary-dark);
    font-size: 0.82rem;
    font-weight: 500;
    border-radius: 50px;
}

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

.more-item {
    padding: 32px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px dashed var(--color-border);
    text-align: center;
    transition: var(--transition);
}

.more-item:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-bg);
    border-style: solid;
}

.more-item h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.more-item p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ========================================
   TEAM SECTION
   ======================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 48px;
}

.team-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    text-align: center;
}

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

.team-avatar {
    width: 110px;
    height: 110px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
    border: 3px solid var(--color-primary-bg);
    background: var(--color-bg-alt);
}

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

.avatar-placeholder {
    display: block;
}

.team-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 10px;
}

.team-roles {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
    margin-bottom: 14px;
}

.team-role {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-bg-alt);
    color: var(--color-text-light);
    font-size: 0.8rem;
    font-weight: 500;
    border-radius: 50px;
}

.team-role-primary {
    background: var(--color-primary-bg);
    color: var(--color-primary-dark);
    font-weight: 600;
}

.team-bio {
    color: var(--color-text-light);
    font-size: 0.9rem;
    line-height: 1.7;
}

.team-vision {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 18px 28px;
    background: var(--color-gold-light);
    border-radius: var(--radius-md);
    color: var(--color-gold);
    font-weight: 600;
    font-size: 1rem;
    border-left: 4px solid var(--color-gold);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   PROJECT SECTION
   ======================================== */
.project-content {
    max-width: 900px;
    margin: 0 auto;
}

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

.project-source h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-primary-bg);
}

.project-source p {
    color: var(--color-text-light);
    font-size: 1.05rem;
    line-height: 1.9;
}

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

.project-goals h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 20px;
}

.project-goals-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.project-goal-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 28px 20px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: var(--transition);
}

.project-goal-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.goal-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 50%;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 14px;
}

.project-goal-card p {
    color: var(--color-text-light);
    font-size: 0.92rem;
    line-height: 1.6;
}

.project-advantage {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 28px 32px;
    background: var(--color-primary-bg);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.advantage-icon {
    flex-shrink: 0;
    color: var(--color-primary);
    margin-top: 2px;
}

.project-status {
    margin-top: 40px;
}

.project-status > h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 20px;
}

.project-status-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.project-status-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 28px 22px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.project-status-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.status-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
    color: var(--color-primary);
}

.status-header h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-secondary);
}

.project-status-card p {
    color: var(--color-text-light);
    font-size: 0.92rem;
    line-height: 1.7;
}

.project-advantage h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.project-advantage p {
    color: var(--color-text-light);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========================================
   PLAN SECTION
   ======================================== */
.plan-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.plan-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--color-border);
    text-align: center;
}

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

.plan-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary-bg), var(--color-accent-light));
    color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.plan-icon svg {
    width: 30px;
    height: 30px;
}

.plan-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 14px;
}

.plan-card p {
    color: var(--color-text-light);
    font-size: 0.92rem;
    line-height: 1.7;
}

/* ========================================
   IP SECTION
   ======================================== */
.ip-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
}

.ip-tab {
    padding: 10px 28px;
    background: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: 50px;
    color: var(--color-text-muted);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-family);
    cursor: pointer;
    transition: var(--transition);
}

.ip-tab.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.ip-tab:hover:not(.active) {
    border-color: var(--color-primary-light);
    color: var(--color-primary);
}

.ip-content {
    display: none;
}

.ip-content.active {
    display: block;
    animation: fadeUp 0.5s ease;
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.ip-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.ip-patent-grid {
    grid-template-columns: repeat(3, 1fr);
}

.ip-patent-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: var(--transition);
}

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

.ip-patent-card img {
    width: 100%;
    height: auto;
    display: block;
}

.ip-patent-card .ip-number {
    display: block;
    padding: 12px 16px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-secondary);
    letter-spacing: 0.03em;
    font-family: 'SF Mono', 'Consolas', monospace;
    background: var(--color-bg-alt);
}

.ip-number {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-secondary);
    letter-spacing: 0.03em;
    font-family: 'SF Mono', 'Consolas', monospace;
}

.software-card .ip-card-header {
    margin-bottom: 16px;
    color: var(--color-primary);
}

.software-card h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 8px;
}

.software-card p {
    color: var(--color-text-muted);
    font-size: 0.88rem;
    line-height: 1.6;
}

/* ========================================
   LAB GALLERY SECTION
   ======================================== */
.lab-gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.lab-gallery-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 3/2;
    background: var(--color-bg-alt);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.lab-gallery-item:hover {
    transform: scale(1.03);
    box-shadow: var(--shadow-lg);
}

.lab-gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.lab-gallery-item:hover img {
    transform: scale(1.08);
}

/* ========================================
   LAB SECTION (Honors - legacy)
   ======================================== */
.lab-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.lab-img-wrapper {
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: var(--color-bg-alt);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.lab-img-wrapper:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.lab-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.lab-img-wrapper:hover img {
    transform: scale(1.08);
}

/* ========================================
   CONTACT SECTION
   ======================================== */
.contact-info-centered {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    width: 52px;
    height: 52px;
    background: var(--color-primary-bg);
    color: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-item h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--color-text-light);
    font-size: 0.95rem;
}


/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--color-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 64px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 16px;
}

.footer-logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    vertical-align: middle;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-links h4,
.footer-business h4,
.footer-philosophy h4 {
    color: var(--color-white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links ul,
.footer-business ul,
.footer-philosophy ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-business li,
.footer-philosophy li {
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.35);
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.back-to-top svg {
    width: 22px;
    height: 22px;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
    .about-grid,
    .business-grid,
    .plan-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .ip-grid,
    .ip-patent-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .project-goals-grid,
    .project-status-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .lab-gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title-main {
        font-size: 2.5rem;
    }
    .hero-title-sub {
        font-size: 1rem;
    }
    .hero-desc {
        font-size: 0.95rem;
    }
    .hero-stats {
        gap: 28px;
    }
    .about-grid,
    .business-grid,
    .plan-grid,
    .ip-grid,
    .ip-patent-grid {
        grid-template-columns: 1fr;
    }
    .lab-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .business-more {
        grid-template-columns: 1fr;
    }
    .project-goals-grid,
    .project-status-grid {
        grid-template-columns: 1fr;
    }
    .project-advantage {
        flex-direction: column;
    }
    .section-title {
        font-size: 2rem;
    }
    .section {
        padding: 64px 0;
    }
    .hamburger {
        display: flex;
    }
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        padding: 100px 32px 32px;
        gap: 4px;
        box-shadow: var(--shadow-xl);
        transition: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: 1000;
    }
    .nav-menu.active {
        right: 0;
    }
    .nav-menu .nav-link {
        color: var(--color-text);
        padding: 12px 16px;
        border-radius: var(--radius-sm);
    }
    .nav-menu .nav-link:hover,
    .nav-menu .nav-link.active {
        color: var(--color-primary);
        background: var(--color-primary-bg);
    }
    .team-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .hero-title-main {
        font-size: 2rem;
    }
    .lab-grid {
        grid-template-columns: 1fr;
    }
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    .ip-tabs {
        flex-direction: column;
        align-items: center;
    }
}