/* ======================================== Section Common Styles ======================================== */
.section-header { margin-bottom: 45px; text-align: center; }
.section-badge { align-items: center; background: rgba(54, 105, 239, 0.1); border-radius: 20px; color: var(--brand-blue); display: inline-flex; font-size: 13px; font-weight: 500; gap: 8px; margin-bottom: 10px; padding: 8px 16px; }
.section-title { color: var(--brand-black); font-size: clamp(28px, 4vw, 36px); font-weight: 700; margin-bottom: 8px; }
.section-subtitle { color: var(--brand-blue); font-size: 16px; font-weight: 500; }
/* Hero Carousel Section */
.hero-carousel { min-height: 85vh; overflow: hidden; position: relative; }
.carousel-container { height: 85vh; position: relative; width: 100%; }
.carousel-slide { inset: 0; opacity: 0; position: absolute; transition: opacity 1s ease, visibility 1s ease; visibility: hidden; }
.carousel-slide.active { opacity: 1; visibility: visible; }
/* Slide Background */
.slide-bg { inset: 0; position: absolute; z-index: 0; }
.slide-bg img { height: 100%; object-fit: cover; transform: scale(1.1); width: 100%; }
.carousel-slide.active .slide-bg img { transform: scale(1); }
.slide-overlay { background: linear-gradient(to right, rgba(0, 0, 0, 0.60), rgba(0, 0, 0, 0.4) 50%, transparent); inset: 0; position: absolute; }
/* Slide Content */
.slide-content { display: flex; flex-direction: column; height: 100%; justify-content: center; margin: 0 auto; max-width: 1200px; padding: 160px 24px 100px; position: relative; width: 100%; z-index: 2; }
.slide-badge { align-items: center; backdrop-filter: blur(8px); background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 24px; display: inline-flex; gap: 8px; margin-bottom: 32px; opacity: 0; padding: 8px 16px; transform: translateY(30px); transition: all 0.8s ease 0.3s; width: fit-content; }
.carousel-slide.active .slide-badge { opacity: 1; transform: translateY(0); }
.slide-badge svg { color: var(--brand-blue); }
.slide-badge span { color: rgba(255, 255, 255, 0.9); font-size: 14px; }
.slide-title { margin-bottom: 24px; opacity: 0; transform: translateY(30px); transition: all 0.8s ease 0.5s; }
.carousel-slide.active .slide-title { opacity: 1; transform: translateY(0); }
.title-line { color: var(--brand-white); display: block; font-size: clamp(40px, 6vw, 60px); font-weight: 700; line-height: 1.15; }
.title-line.gradient { background: linear-gradient(135deg, var(--brand-blue), var(--brand-blue-light)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.slide-desc { color: rgba(255, 255, 255, 0.85); font-size: 17px; line-height: 1.8; margin-bottom: 40px; max-width: 600px; opacity: 0; transform: translateY(30px); transition: all 0.8s ease 0.7s; }
.carousel-slide.active .slide-desc { opacity: 1; transform: translateY(0); }
.slide-content .btn { align-self: flex-start; /* 防止按钮被拉伸 */ opacity: 0; transform: translateY(30px); transition: all 0.8s ease 0.9s; width: auto; /* 确保宽度自适应内容 */ }
.carousel-slide.active .btn { align-self: flex-start; /* 防止按钮被拉伸 */ opacity: 1; transform: translateY(0); width: auto; /* 确保宽度自适应内容 */ }
/* Carousel Navigation */
.carousel-nav { align-items: center; backdrop-filter: blur(8px); background: rgba(255, 255, 255, 0.1); border: 1px solid rgba(255, 255, 255, 0.2); border-radius: 50%; color: var(--brand-white); display: flex; height: 50px; justify-content: center; position: absolute; top: 50%; transform: translateY(-50%); transition: all var(--transition-normal); width: 50px; z-index: 10; }
.carousel-nav:hover { background: rgba(255, 255, 255, 0.2); transform: translateY(-50%) scale(1.1); }
.carousel-nav.prev { left: 24px; }
.carousel-nav.next { right: 24px; }
/* Carousel Indicators */
.carousel-indicators { bottom: 50px; display: flex; gap: 12px; left: 50%; position: absolute; transform: translateX(-50%); z-index: 10; }
.indicator { background: rgba(255, 255, 255, 0.3); border: 2px solid transparent; border-radius: 50%; height: 12px; transition: all var(--transition-normal); width: 12px; }
.indicator.active { background: var(--brand-blue); border-color: var(--brand-white); transform: scale(1.2); }
.indicator:hover { background: rgba(255, 255, 255, 0.6); }
/* Progress Bar */
.carousel-progress { background: rgba(255, 255, 255, 0.1); bottom: 0; height: 4px; left: 0; position: absolute; right: 0; z-index: 10; }
.progress-bar { background: var(--brand-blue); height: 100%; transition: width 0.1s linear; width: 0; }
/* Floating Particles */
.floating-particles { inset: 0; overflow: hidden; pointer-events: none; position: absolute; z-index: 1; }
.floating-particles span { animation: float 3s ease-in-out infinite; background: rgba(54, 105, 239, 0.3); border-radius: 50%; height: 8px; position: absolute; width: 8px; }
.floating-particles span:nth-child(1) { animation-delay: 0s; left: 15%; top: 20%; }
.floating-particles span:nth-child(2) { animation-delay: 0.5s; left: 30%; top: 45%; }
.floating-particles span:nth-child(3) { animation-delay: 1s; left: 45%; top: 25%; }
.floating-particles span:nth-child(4) { animation-delay: 1.5s; left: 60%; top: 60%; }
.floating-particles span:nth-child(5) { animation-delay: 2s; left: 75%; top: 35%; }
.floating-particles span:nth-child(6) { animation-delay: 2.5s; left: 85%; top: 70%; }
@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}
.btn { align-items: center; border-radius: 28px; display: inline-flex; font-size: 15px; font-weight: 500; gap: 8px; padding: 14px 28px; transition: all var(--transition-normal); }
.btn-primary { background: var(--brand-blue); color: var(--brand-white); }
.btn-primary:hover { box-shadow: 0 10px 30px rgba(54, 105, 239, 0.4); transform: scale(1.05); }
.btn-primary svg { transition: transform var(--transition-fast); }
.btn-primary:hover svg { transform: translateX(4px); }
.btn-outline-hero { backdrop-filter: blur(8px); background: transparent; border: 1px solid rgba(255, 255, 255, 0.3); color: var(--brand-white); }
.btn-outline-hero:hover { background: rgba(255, 255, 255, 0.1); }
.hero-bottom-gradient { background: linear-gradient(to top, var(--brand-white), transparent); bottom: 0; height: 150px; left: 0; position: absolute; right: 0; z-index: 2; }
/* ======================================== Philosophy Section ======================================== */
.philosophy { background: var(--brand-white); padding: 100px 0; }
.philosophy-grid { display: grid; gap: 32px; grid-template-columns: repeat(3, 1fr); }
.philosophy-card { background: var(--brand-white); border: 1px solid var(--brand-gray3); border-radius: 20px; box-shadow: var(--shadow-md); padding: 40px 32px; text-align: center; transition: all var(--transition-slow); }
.philosophy-card:hover { border-color: transparent; box-shadow: var(--shadow-xl); transform: translateY(-8px); }
.philosophy-icon { align-items: center; border-radius: 16px; color: var(--brand-white); display: flex; height: 72px; justify-content: center; margin: 0 auto 24px; transition: transform var(--transition-slow); width: 72px; }
.philosophy-card:hover .philosophy-icon { transform: scale(1.1); }
.philosophy-icon.blue { background: linear-gradient(135deg, #3B82F6, #06B6D4); }
.philosophy-icon.purple { background: linear-gradient(135deg, #8B5CF6, #EC4899); }
.philosophy-icon.green { background: linear-gradient(135deg, #22C55E, #10B981); }
.philosophy-card h3 { color: var(--brand-black); font-size: 22px; font-weight: 600; margin-bottom: 16px; }
.philosophy-card p { color: var(--brand-gray1); font-size: 15px; line-height: 1.8; }
/* ======================================== Research Section ======================================== */
.research { background: var(--brand-gray2); overflow: hidden; padding: 100px 0; position: relative; }
.research-bg { background-image: radial-gradient(circle at 1px 1px, var(--brand-blue) 1px, transparent 0); background-size: 40px 40px; inset: 0; opacity: 0.4; position: absolute; }
.research-grid { align-items: center; display: grid; gap: 80px; grid-template-columns: 1.2fr 1fr; margin-bottom: 60px; position: relative; z-index: 1; }
.research-text { margin: 28px 0; }
.research-text p { color: var(--brand-gray1); font-size: 15px; line-height: 1.9; margin-bottom: 16px; }
.research-stats { display: grid; gap: 20px; grid-template-columns: repeat(3, 1fr); }
.stat-card { background: var(--brand-white); border-radius: 16px; box-shadow: var(--shadow-md); padding: 32px 24px; text-align: center; transition: all var(--transition-slow); }
.stat-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.stat-number { color: var(--brand-blue); font-size: 48px; font-weight: 700; line-height: 1; }
.stat-unit { color: var(--brand-blue); font-size: 24px; font-weight: 600; }
.stat-label { color: var(--brand-gray1); display: block; font-size: 14px; margin-top: 8px; }
/* Lab Types */
.lab-types { display: grid; gap: 24px; grid-template-columns: repeat(3, 1fr); position: relative; z-index: 1; }
.lab-type-card { background: var(--brand-white);border-radius: 20px; box-shadow: var(--shadow-sm); padding: 0 0 32px 0; text-align: center; transition: all var(--transition-slow); }
.lab-type-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.lab-type-icon { align-items: center; border-radius: 20px; color: var(--brand-blue); display: flex; justify-content: center; margin: 0 auto 20px; }
.lab-type-icon img {border-top-left-radius: 20px;border-top-right-radius: 20px;}
.lab-type-card h4 { color: var(--brand-black); font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.lab-type-card p { color: var(--brand-gray1); font-size: 14px; line-height: 1.6; }
/* ======================================== Safety Section ======================================== */
.safety { background: var(--brand-white); padding: 10px 0; }
.safety-grid { align-items: center; display: grid; gap: 80px; grid-template-columns: 1.2fr 1fr; }
.safety-text { margin: 24px 0; }
.safety-text p { color: var(--brand-gray1); font-size: 15px; line-height: 1.8; }
.safety-list { display: flex; flex-direction: column; gap: 16px; margin: 32px 0; }
.safety-list li { align-items: flex-start; display: flex; gap: 16px; }
.check-icon { background: linear-gradient(135deg, var(--brand-blue), var(--brand-blue-light)); border-radius: 50%; flex-shrink: 0; height: 24px; margin-top: 2px; position: relative; width: 24px; }
.check-icon::after { border: solid white; border-width: 0 2px 2px 0; content: ""; height: 9px; left: 9px; position: absolute; top: 6px; transform: rotate(45deg); width: 5px; }
.safety-list li div { display: flex; flex-direction: column; gap: 2px; }
.safety-list li strong { color: var(--brand-black); font-size: 15px; font-weight: 600; }
.safety-list li span { color: var(--brand-gray1); font-size: 14px; }
.safety-footer { border-top: 1px solid var(--brand-gray3); color: var(--brand-gray1); font-size: 14px; line-height: 1.7; padding-top: 16px; }
.safety-visual { position: relative; }
.safety-image { border-radius: 20px; box-shadow: var(--shadow-xl); overflow: hidden; }
.safety-image img { height: 100%; object-fit: cover; width: 100%; }
.safety-badges { bottom: 10px; display: flex; gap: 20px; padding: 10px; position: relative;}
.safety-badge { align-items: center; background: var(--brand-white); border-radius: 30px; box-shadow: var(--shadow-lg); color: var(--brand-black); display: flex; font-size: 14px; font-weight: 500; gap: 8px; padding: 12px 20px; }
.safety-badge svg { color: var(--brand-blue); }
/* ======================================== Skin Test Section ======================================== */
.skin-test { background: var(--brand-gray2); overflow: hidden; padding: 100px 0; position: relative; }
.skin-test-bg { background: linear-gradient(135deg, rgba(54, 105, 239, 0.03), transparent, rgba(139, 92, 246, 0.03)); inset: 0; position: absolute; }
.skin-test-grid { align-items: center; display: grid; gap: 80px; grid-template-columns: 1fr 1.1fr; position: relative; z-index: 1; }
.skin-test-text { margin: 24px 0; }
.skin-test-text p { color: var(--brand-gray1); font-size: 15px; line-height: 1.8; }
.skin-test-list { display: flex; flex-direction: column; gap: 16px; margin: 32px 0; }
.skin-test-list li { align-items: center; display: flex; gap: 16px; }
.skin-test-list .number { align-items: center; background: linear-gradient(135deg, var(--brand-blue), var(--brand-blue-light)); border-radius: 50%; color: var(--brand-white); display: flex; flex-shrink: 0; font-size: 16px; font-weight: 600; height: 36px; justify-content: center; width: 36px; }
.skin-test-list span:last-child { color: var(--brand-black); font-size: 15px; }
.skin-test-visual { position: relative; }
.test-device { border-radius: 20px; box-shadow: var(--shadow-xl); overflow: hidden; }
.test-device img { height: 100%; object-fit: cover; width: 100%; }
.floating-card { align-items: center; animation: floatCard 3s ease-in-out infinite; background: var(--brand-white); border-radius: 12px; box-shadow: var(--shadow-lg); color: var(--brand-black); display: flex; font-size: 14px; font-weight: 500; gap: 10px; padding: 14px 20px; position: absolute; }
.floating-card svg { color: var(--brand-blue); }
.floating-card.card-1 { animation-delay: 0s; left: -20px; top: 10%; }
.floating-card.card-2 { animation-delay: 1s; right: -30px; top: 40%; }
.floating-card.card-3 { animation-delay: 2s; bottom: 15%; left: 10%; }
@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}
/* ========================================首页 Responsive Design ======================================== */
@media (max-width: 1024px) {
    /* Carousel Responsive */
    .carousel-container { height: auto; }
    .carousel-slide { min-height: 700px; }
    .slide-bg img { min-height: 700px; }
    .carousel-nav { height: 44px; width: 44px; }
    .carousel-nav.prev { left: 16px; }
    .carousel-nav.next { right: 16px; }
    .slide-content { min-height: 700px; padding: 140px 24px 100px; }
    .carousel-indicators { bottom: 40px; }
    .philosophy-grid { grid-template-columns: 1fr; }
    .research-grid { gap: 48px; grid-template-columns: 1fr; }
    .research-stats { margin: 0 auto; max-width: 500px; }
    .lab-types { grid-template-columns: 1fr; }
    .safety-grid { gap: 48px; grid-template-columns: 1fr; }
    .safety-visual { order: -1; }
    .skin-test-grid { gap: 48px; grid-template-columns: 1fr; }
    .skin-test-visual { order: -1; }
    .floating-card { display: none; }
    .slide-title .title-line { font-size: clamp(32px, 5vw, 48px); }
}
/* ======================================== Mobile Responsive (640px) ======================================== */
@media (max-width: 640px) {
    /* Carousel Mobile - Fixed with Fade Effect */
    .hero-carousel { height: auto; min-height: auto; }
    .carousel-container { height: auto; min-height: auto; position: relative; }
    .carousel-slide { display: block; height: 100%; inset: 0; min-height: 100vh; opacity: 0; position: absolute; transition: opacity 0.6s ease-in-out, visibility 0.6s ease-in-out; visibility: hidden; z-index: 1; }
    .carousel-slide.active { opacity: 1; position: relative; visibility: visible; z-index: 2; }
    .slide-bg { height: 100%; inset: 0; min-height: 100vh; position: absolute; }
    .slide-bg img { height: 100vh; min-height: 600px; object-position: center; }
    .slide-content { justify-content: center; min-height: 100vh; padding: 100px 20px 120px; position: relative; }
    .slide-desc { font-size: 16px; line-height: 1.7; margin-bottom: 30px; }
    .slide-badge { margin-bottom: 20px; padding: 6px 12px; }
    .slide-badge span { font-size: 12px; }
    .carousel-nav { display: none; }
    .carousel-indicators { bottom: 70px; gap: 10px; }
    .indicator { height: 10px; width: 10px; }
    .carousel-progress { height: 3px; }
    .stat-card { padding: 15px; }
    .stat-number { font-size: 30px; }
    .safety-badges { align-items: center; flex-direction: column; gap: 12px; }
    .container {padding: 15px;}
    .slide-title .title-line { font-size: clamp(32px, 5vw, 48px); }
}