/* --- Global Styles --- */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;
    background-color: #f8f9fa;
    overflow-x: hidden;
    width: 100%;
}

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

.container {
    width: 85%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 15px;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: #1a2b48;
}

a {
    color: #007bff;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* --- Header --- */
header {
    background: #fff;
    border-bottom: 1px solid #e9ecef;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    position: relative; /* 为移动端菜单定位提供基准 */
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #1a2b48;
    display: inline-block;
    pointer-events: auto;
}

.logo img {
    width: 188px;
    height: 145px;
    max-width: 100%;
    display: block;
    pointer-events: auto;
}

nav {
    display: flex;
    align-items: center;
}

nav ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
}

nav li {
    margin-left: 20px;
}

nav a {
    color: #333;
    font-weight: 500;
    text-decoration: none;
}

nav a:hover {
    text-decoration: none;
    color: #007bff;
}

nav a.active {
    color: #007bff;
}

.lang-switcher a {
    margin-left: 10px;
    font-size: 0.9rem;
}


/* --- Hero Section --- */
.hero {
    background: #1a2b48;
    color: #fff;
    padding: 6rem 0;
    text-align: center;
    background-size: cover;
    background-position: center;
    position: relative;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

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

.hero h1 {
    color: #fff;
    font-size: 3.2rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero .btn {
    padding: 12px 25px;
    font-size: 1rem;
    border-radius: 5px;
    text-decoration: none;
    display: inline-block;
    transition: background-color 0.3s ease;
}

.hero .btn-primary {
    background-color: #007bff;
    color: #fff;
}

.hero .btn-primary:hover {
    background-color: #0056b3;
}

.hero .btn-secondary {
    background-color: transparent;
    color: #fff;
    border: 1px solid #fff;
    margin-left: 10px;
}

.hero .btn-secondary:hover {
    background-color: #fff;
    color: #1a2b48;
}

/* --- Advantages Section --- */
.advantages {
    padding: 5rem 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 50%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.advantages::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,123,255,0.3), transparent);
}

.advantages .container {
    text-align: center;
    max-width: 1200px;
    position: relative;
    z-index: 1;
}

.advantages-grid {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.advantage-item {
    position: relative;
    flex: 1;
    min-width: 280px;
    max-width: 350px;
    padding: 2.5rem 2rem;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0,123,255,0.1);
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out backwards;
    text-align: center;
}

.advantage-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #007bff, #28a745, #ff6b35);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.advantage-item:hover::before {
    transform: scaleX(1);
}

.advantage-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0,123,255,0.25);
    border-color: rgba(0,123,255,0.3);
}

.advantage-icon-wrapper {
    position: relative;
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

.advantage-icon {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 90px;
    height: 90px;
    margin: 0 auto;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    flex-shrink: 0;
}

.advantage-icon.active {
    transform: scale(1.1) rotate(360deg);
    box-shadow: 0 8px 30px rgba(0,123,255,0.4);
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
}

.advantage-icon.active svg {
    fill: #fff !important;
}

.advantage-icon svg {
    display: block;
    width: 50px !important;
    height: 50px !important;
    max-width: 50px !important;
    max-height: 50px !important;
    flex-shrink: 0;
    transition: all 0.4s ease;
}

.advantage-icon-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(0,123,255,0.3) 0%, transparent 70%);
    border-radius: 50%;
    transition: width 0.4s ease, height 0.4s ease;
    pointer-events: none;
}

.advantage-icon-glow.active {
    width: 150px;
    height: 150px;
}

.advantage-item h3 {
    font-size: 1.4rem;
    color: #1a2b48;
    margin: 1.5rem 0 1rem;
    font-weight: 600;
    line-height: 1.4;
}

.advantage-item p {
    font-size: 1rem;
    color: #666;
    line-height: 1.7;
    margin: 0;
}

.advantage-card-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.6s ease;
    pointer-events: none;
}

.advantage-card-shine.active {
    left: 100%;
}

/* --- Manufacturing Lab Section --- */
.manufacturing-lab {
    padding: 5rem 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 50%, #f0f4f8 100%);
    position: relative;
    overflow: hidden;
}

.manufacturing-lab::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,123,255,0.3), transparent);
}

.manufacturing-lab .container {
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

/* 统一的section标题样式 */
.section-header {
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1a2b48;
    background: linear-gradient(135deg, #1a2b48 0%, #007bff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, #007bff, #28a745);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.3rem;
    color: #666;
    font-weight: 400;
    margin-top: 1.5rem;
    line-height: 1.6;
}

.manufacturing-subtitle {
    font-size: 1.3rem;
    color: #007bff;
    font-weight: 600;
    margin-bottom: 2.5rem;
}

.manufacturing-content {
    margin-top: 3rem;
}

/* 实验室特性卡片 */
.lab-feature {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.lab-feature-card {
    position: relative;
    flex: 1;
    min-width: 280px;
    max-width: 350px;
    padding: 2rem;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0,123,255,0.1);
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out backwards;
}

.lab-feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #007bff, #28a745);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.lab-feature-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0,123,255,0.2);
    border-color: rgba(0,123,255,0.3);
}

.feature-icon-wrapper {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
}

.feature-icon {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    border-radius: 50%;
    color: #fff;
    transition: all 0.4s ease;
    box-shadow: 0 4px 15px rgba(0,123,255,0.3);
}

.feature-icon svg {
    width: 35px !important;
    height: 35px !important;
    max-width: 35px !important;
    max-height: 35px !important;
    flex-shrink: 0;
}

.feature-icon.active {
    transform: rotate(360deg) scale(1.1);
    box-shadow: 0 6px 25px rgba(0,123,255,0.5);
}

.feature-icon.active svg {
    width: 35px !important;
    height: 35px !important;
}

.lab-feature-card h3 {
    font-size: 1.4rem;
    color: #1a2b48;
    margin: 0;
    font-weight: 600;
}

/* 技术列表 */
.tech-list {
    display: flex;
    justify-content: center;
    gap: 25px;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.tech-item {
    position: relative;
    flex: 1;
    min-width: 220px;
    max-width: 300px;
    padding: 2rem 1.5rem;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0,123,255,0.1);
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out backwards;
}

.tech-item::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(0,123,255,0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.tech-item:hover::before {
    opacity: 1;
}

.tech-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 12px 40px rgba(0,123,255,0.25);
    border-color: rgba(0,123,255,0.3);
}

.tech-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    border-radius: 12px;
    color: #fff;
    transition: all 0.4s ease;
}

.tech-icon svg {
    width: 30px !important;
    height: 30px !important;
    max-width: 30px !important;
    max-height: 30px !important;
    flex-shrink: 0;
}

.tech-icon.active {
    transform: scale(1.15) rotate(5deg);
    box-shadow: 0 8px 20px rgba(0,123,255,0.4);
}

.tech-icon.active svg {
    width: 30px !important;
    height: 30px !important;
}

.tech-item h4 {
    font-size: 1.2rem;
    color: #1a2b48;
    margin: 0;
    font-weight: 600;
    line-height: 1.4;
}

.tech-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.5s ease;
}

.tech-shine.active {
    left: 100%;
}

.tech-summary {
    margin-top: 2rem;
}

.tech-benefits {
    font-size: 1.2rem;
    color: #28a745;
    font-weight: 600;
    margin: 2rem 0 1rem;
    letter-spacing: 0.5px;
}

.platform-desc {
    font-size: 1.2rem;
    color: #1a2b48;
    font-weight: 500;
    margin-top: 1.5rem;
    line-height: 1.6;
}

/* --- Ingredients Section --- */
.ingredients {
    padding: 5rem 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 50%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.ingredients::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,123,255,0.3), transparent);
}

.ingredients .container {
    text-align: center;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.ingredients-subtitle {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 3rem;
}

.ingredients-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-top: 3rem;
}

/* 中等屏幕优化 - 平板横屏 */
@media (max-width: 992px) and (min-width: 769px) {
    .ingredients-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
}

.ingredient-card {
    position: relative;
    background: #fff;
    padding: 2rem 1.8rem;
    border-radius: 16px;
    border: 1px solid rgba(0,123,255,0.1);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: left;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out backwards;
}

.ingredient-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #007bff, #28a745);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

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

.ingredient-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 12px 40px rgba(0,123,255,0.2);
    border-color: rgba(0,123,255,0.3);
    background: #fff;
}

.ingredient-header {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    margin-bottom: 1.2rem;
}

.ingredient-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: #fff;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0,123,255,0.3);
    transition: transform 0.3s ease;
}

.ingredient-card:hover .ingredient-number {
    transform: scale(1.1) rotate(5deg);
}

.ingredient-card h3 {
    font-size: 1.1rem;
    color: #1a2b48;
    margin: 0;
    font-weight: 600;
    line-height: 1.4;
    flex: 1;
}

.ingredient-divider {
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(0,123,255,0.2), transparent);
    margin: 1.2rem 0;
    border-radius: 1px;
}

.ingredient-desc {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.8;
    margin: 0;
    position: relative;
    z-index: 1;
}

.ingredient-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(0,123,255,0.15) 0%, transparent 70%);
    border-radius: 50%;
    transition: width 0.4s ease, height 0.4s ease;
    pointer-events: none;
}

.ingredient-glow.active {
    width: 200%;
    height: 200%;
}

/* Vue 过渡动画 */
.fade-up-enter-active,
.fade-up-leave-active {
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-up-enter-from {
    opacity: 0;
    transform: translateY(30px);
}

.fade-up-enter-to {
    opacity: 1;
    transform: translateY(0);
}

.stagger-enter-active,
.stagger-leave-active {
    transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.stagger-enter-from {
    opacity: 0;
    transform: translateY(30px) scale(0.9);
}

.stagger-enter-to {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.stagger-grid-enter-active,
.stagger-grid-leave-active {
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.stagger-grid-enter-from {
    opacity: 0;
    transform: translateY(20px) scale(0.95);
}

.stagger-grid-enter-to {
    opacity: 1;
    transform: translateY(0) scale(1);
}

/* 动画关键帧 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Generic Page Header --- */
.page-header {
    background: #e9ecef;
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid #dee2e6;
    background-size: cover;
    background-position: center;
    position: relative;
    color: #fff;
}

.page-header::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 1;
}

.page-header .container {
    position: relative;
    z-index: 2;
}

.page-header h1 {
    font-size: 2.5rem;
    color: #fff;
    margin: 0;
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
}

/* --- Content Section --- */
.content-section {
    padding: 3rem 0;
    background: #fff;
}

.content-section .container {
    max-width: 900px;
}

/* --- Product Page --- */
.product {
    display: flex;
    gap: 40px;
    margin-bottom: 3rem;
    align-items: flex-start;
}
.product:last-child {
    margin-bottom: 0;
}
.product-image {
    flex: 0 0 300px;
    height: auto;
    border-radius: 8px;
    overflow: hidden;
}
.product-image img {
    width: 100%;
    height: auto;
    display: block;
}
.product-info h2 {
    margin-top: 0;
}

.product-cta {
    margin-top: 20px;
}

.product-cta .btn {
    margin-right: 10px;
    margin-bottom: 10px;
}

/* --- About Page --- */
.about-section h2 {
    border-bottom: 2px solid #007bff;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.about-item {
    margin-bottom: 2.5rem;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    align-items: start;
}

.about-grid-item img {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 15px;
}

/* --- Partner Page --- */
.partner-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-bottom: 3rem;
}

.partner-feature-item h2 {
    color: #007bff;
}

.partner-feature-item ul {
    list-style-type: none;
    padding-left: 0;
}

.partner-feature-item li {
    margin-bottom: 1rem;
    line-height: 1.7;
}

/* --- Partner Form --- */
.form-section {
    max-width: 700px;
    margin: 0 auto;
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: .5rem;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    max-width: 100%;
    padding: .75rem;
    font-size: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
    box-sizing: border-box;
}

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

.btn-submit {
    display: block;
    width: 100%;
    padding: 1rem;
    font-size: 1.1rem;
    background: #007bff;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn-submit:hover {
    background: #0056b3;
}


/* --- Footer --- */
footer {
    background: #343a40;
    color: #fff;
    text-align: center;
    padding: 2rem 0;
    margin-top: 40px;
}

footer .container {
    padding: 0 20px;
}

/* --- 汉堡菜单按钮样式 --- */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    position: relative;
    z-index: 1001;
    min-width: 44px;
    min-height: 44px;
    gap: 5px;
}

.menu-toggle .bar {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #333;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.menu-toggle.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.menu-toggle.active .bar:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}


@media (max-width: 992px) {
    body {
        overflow-x: hidden;
    }

    .container {
        width: 100%;
        padding: 15px 10px;
        max-width: 100%;
    }

    header {
        padding: 0.5rem 0;
    }

    header .container {
        flex-wrap: wrap; /* 允许换行 */
        justify-content: space-between;
    }

    .logo {
        order: 1; /* logo 在左 */
    }

    .lang-switcher {
        order: 2; /* 语言切换在中间 */
    }

    .menu-toggle {
        display: flex; /* 在移动端显示按钮 */
        order: 3; /* 按钮在最右 */
    }

    nav {
        order: 4; /* 导航栏在最下方 */
        width: 100%;
        margin-top: 10px; /* 与上方元素留出间距 */
    }

    nav ul.nav-list {
        display: none; /* 默认隐藏 */
        flex-direction: column;
        width: 100%;
        padding: 0;
        margin: 0;
    }
    
    nav ul.nav-list.active {
        display: flex; /* 点击后显示 */
    }

    nav li {
        margin: 0;
        width: 100%;
        text-align: center;
    }

    nav li a {
        padding: 15px 10px;
        display: block;
        font-size: 16px;
        color: #333;
        border-bottom: 1px solid #f0f0f0;
    }

    nav li:last-child a {
        border-bottom: none;
    }

    nav li a:hover,
    nav li a.active {
        background-color: #007bff;
        color: #fff;
    }

    .hero {
        padding: 4rem 0;
    }

    .hero h1 {
        font-size: 2rem;
        line-height: 1.3;
        margin-bottom: 1rem;
    }

    .hero p {
        font-size: 1rem;
        padding: 0 10px;
    }

    .hero .btn {
        padding: 10px 20px;
        font-size: 0.95rem;
        margin: 5px;
    }

    .hero .btn-secondary {
        margin-left: 0;
    }

    .advantages {
        padding: 3rem 0;
    }

    .advantages-grid {
        flex-direction: column;
        gap: 20px;
    }

    .advantage-item {
        min-width: 100%;
        max-width: 100%;
        padding: 2rem 1.5rem;
    }

    .advantage-icon {
        width: 80px;
        height: 80px;
    }

    .advantage-icon svg {
        width: 45px !important;
        height: 45px !important;
    }

    .manufacturing-lab {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .section-subtitle {
        font-size: 1.1rem;
    }

    .lab-feature {
        flex-direction: column;
        gap: 20px;
    }

    .lab-feature-card {
        min-width: 100%;
        max-width: 100%;
        padding: 1.5rem;
    }

    .lab-feature-card h3 {
        font-size: 1.2rem;
    }

    .tech-list {
        flex-direction: column;
        gap: 20px;
    }

    .tech-item {
        min-width: 100%;
        max-width: 100%;
        padding: 1.5rem;
    }

    .tech-item h4 {
        font-size: 1.1rem;
    }

    .ingredients {
        padding: 3rem 0;
    }

    .ingredients-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .page-header {
        padding: 1.5rem 0;
    }

    .page-header h1 {
        font-size: 1.8rem;
        line-height: 1.3;
        padding: 0 10px;
    }

    .page-header p {
        font-size: 1rem;
        padding: 0 10px;
    }

    .content-section {
        padding: 2rem 0;
    }

    .about-grid,
    .partner-features {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .partner-feature-item {
        margin-bottom: 1.5rem;
    }

    .product {
        flex-direction: column;
        align-items: center;
        gap: 20px;
        margin-bottom: 2.5rem;
    }

    .product-image {
        flex: 0 0 auto;
        width: 100%;
        max-width: 300px;
        margin-bottom: 1rem;
    }

    .product-info h2 {
        font-size: 1.5rem;
        line-height: 1.3;
    }

    .product-cta .btn {
        display: block;
        width: 100%;
        margin: 10px 0;
        text-align: center;
    }

    .form-section {
        padding: 1.5rem;
        margin: 0;
        width: 100%;
        max-width: 100%;
    }

    .form-group {
        width: 100%;
    }

    .form-group input,
    .form-group textarea,
    .form-group select {
        font-size: 16px; /* 防止iOS自动缩放 */
        max-width: 100%;
        width: 100%;
    }
}

@media (max-width: 768px) {
    .container {
        width: 100%;
        padding: 10px 8px;
        max-width: 100%;
    }

    header {
        padding: 0.4rem 0;
    }

    header .container {
        padding: 5px 8px;
    }

    .logo img {
        width: 80px;
        height: 61px;
        max-width: 80px;
    }

    nav li a {
        padding: 14px 18px;
        font-size: 14px;
    }

    .lang-switcher a {
        font-size: 0.75rem;
        margin-left: 4px;
    }

    .hero {
        padding: 3rem 0;
    }

    .hero h1 {
        font-size: 1.6rem;
    }

    .hero p {
        font-size: 0.95rem;
    }

    .advantages {
        padding: 2rem 0;
    }

    .advantage-item {
        padding: 1.5rem 1.2rem;
    }

    .advantage-icon {
        width: 70px;
        height: 70px;
    }

    .advantage-icon svg {
        width: 40px !important;
        height: 40px !important;
    }

    .advantage-item h3 {
        font-size: 1.2rem;
    }

    .advantage-item p {
        font-size: 0.95rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .section-subtitle {
        font-size: 1rem;
    }

    .lab-feature-card {
        padding: 1.2rem;
    }

    .lab-feature-card h3 {
        font-size: 1.1rem;
    }

    .tech-item {
        padding: 1.2rem;
    }

    .tech-item h4 {
        font-size: 1rem;
    }

    .ingredients-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .ingredient-card {
        padding: 1.5rem 1.2rem;
    }

    .ingredient-number {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }

    .ingredient-card h3 {
        font-size: 1rem;
    }

    .ingredient-desc {
        font-size: 0.9rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    .page-header p {
        font-size: 0.95rem;
    }

    .content-section {
        padding: 1.5rem 0;
    }

    .about-item h2,
    .partner-feature-item h2 {
        font-size: 1.4rem;
    }

    .product-info h2 {
        font-size: 1.3rem;
    }

    .product-info h3 {
        font-size: 1.1rem;
    }

    .btn-submit {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    body {
        max-width: 100vw;
        overflow-x: hidden;
    }

    .container {
        width: 100%;
        padding: 8px 5px;
        max-width: 100%;
    }

    header .container {
        padding: 5px;
    }

    .logo img {
        width: 70px;
        height: 54px;
        max-width: 70px;
    }

    nav li a {
        padding: 12px 15px;
        font-size: 13px;
    }

    .lang-switcher {
        margin-left: 5px;
    }

    .lang-switcher a {
        font-size: 0.7rem;
        margin-left: 3px;
    }

    .hero h1 {
        font-size: 1.4rem;
        line-height: 1.2;
    }

    .hero p {
        font-size: 0.9rem;
    }

    .hero .btn {
        padding: 8px 16px;
        font-size: 0.9rem;
        display: block;
        width: 90%;
        margin: 8px auto;
    }

    .page-header h1 {
        font-size: 1.3rem;
        line-height: 1.2;
    }

    .advantage-item h3 {
        font-size: 1.1rem;
    }

    .advantage-item p {
        font-size: 0.95rem;
    }

    .form-section {
        padding: 1rem 0.75rem;
        width: 100%;
        max-width: 100%;
    }

    .form-section h2 {
        font-size: 1.3rem;
        word-wrap: break-word;
    }

    .form-group input,
    .form-group textarea,
    .form-group select {
        width: 100%;
        max-width: 100%;
    }

    .hero .btn,
    .product-cta .btn,
    .btn-submit {
        width: 100%;
        max-width: 100%;
    }
}

/* 手机端专用优化 (小屏幕) */
@media (max-width: 768px) {
    header .container {
        padding: 5px 8px;
        gap: 6px;
    }

    .logo img {
        width: 70px !important;
        height: 54px !important;
        max-width: 70px !important;
    }

    .lang-switcher a {
        font-size: 0.7rem;
        margin-left: 3px;
        padding: 3px 5px;
    }

    nav ul {
        max-width: 100%;
        gap: 6px;
    }

    nav li {
        flex: 0 0 calc(33.33% - 4px);
        min-width: 0;
    }

    nav li a {
        padding: 8px 6px;
        font-size: 11px;
    }
}