/* ===== 页面容器 ===== */
.page {
    display: none;
    animation: fadeUp 0.4s ease forwards;
}
.page.active { display: block; }
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--gray-900);
    margin-bottom: 0.5rem;
}
.section-sub {
    color: var(--gray-600);
    font-size: 1.1rem;
    margin-bottom: 2.5rem;
}
.badge-safe {
    display: inline-block;
    background: #DCFCE7;
    color: #166534;
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 40px;
    margin-bottom: 12px;
}

/* ===== 首页 ===== */
.hero {
    padding: 60px 0 40px 0;
    background: linear-gradient(165deg, #FFFFFF 0%, var(--primary-bg) 100%);
    border-bottom: 1px solid var(--gray-200);
}
.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.hero h1 {
    font-size: 3.2rem;
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.03em;
    color: var(--gray-900);
    margin-bottom: 16px;
}
.hero h1 .highlight { color: var(--primary); }
.hero p {
    font-size: 1.15rem;
    color: var(--gray-600);
    max-width: 480px;
    margin-bottom: 32px;
}
.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-image {
    background: #ffffff;
    padding: 40px 32px;
    border-radius: 16px;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
    text-align: center;
    width: 100%;
}
.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 8px;
}
.stat-item .num {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
}
.stat-item .label {
    font-size: 0.9rem;
    color: var(--gray-600);
}

/* 商品卡片 */
.products {
    padding: 80px 0;
}
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-top: 16px;
}
.product-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 32px 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-100);
    transition: var(--transition);
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}
.product-card .icon { font-size: 2.4rem; margin-bottom: 8px; }
.product-card h3 {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 4px;
}
.product-card .tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 2px 12px;
    border-radius: 40px;
    margin-bottom: 12px;
}
.product-card ul {
    margin: 16px 0 24px 0;
    padding: 0;
}
.product-card ul li {
    font-size: 0.95rem;
    color: var(--gray-600);
    padding: 4px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
.product-card ul li::before {
    content: "✓";
    color: var(--primary);
    font-weight: 700;
}
.product-card .btn-outline {
    padding: 8px 24px;
    font-size: 0.9rem;
}

/* 信任区 */
.trust {
    background: var(--gray-50);
    padding: 80px 0;
    border-top: 1px solid var(--gray-200);
}
.trust-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}
.steps {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.step-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 18px;
    background: #fff;
    border-radius: 60px;
    border: 1px solid var(--gray-200);
    transition: var(--transition);
}
.step-item:hover {
    border-color: var(--primary);
    background: var(--primary-bg);
}
.step-item .num {
    background: var(--primary);
    color: #fff;
    width: 32px;
    height: 32px;
    border-radius: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    flex-shrink: 0;
}
.step-item .text { font-weight: 500; }
.step-item .desc {
    font-size: 0.9rem;
    color: var(--gray-600);
}
.reviews {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.review-card {
    background: #fff;
    padding: 20px 24px;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow);
}
.review-card .stars {
    color: #F59E0B;
    letter-spacing: 2px;
    margin-bottom: 4px;
}
.review-card blockquote {
    font-style: normal;
    color: var(--gray-700);
}
.review-card .meta {
    font-size: 0.8rem;
    color: var(--gray-600);
    margin-top: 8px;
}

/* ===== 首页 FAQ 区域 ===== */
.faq-home {
    padding: 80px 0;
    background: #fff;
    border-top: 1px solid var(--gray-200);
}
.faq-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 900px;
    margin: 0 auto;
}
.faq-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
}
.faq-question {
    background: #fff;
    padding: 18px 24px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
    user-select: none;
}
.faq-question:hover {
    background: var(--gray-50);
}
.faq-question .arrow {
    transition: transform 0.3s ease;
    font-size: 1.2rem;
}
.faq-item.open .faq-question .arrow {
    transform: rotate(180deg);
}
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 24px;
    background: var(--gray-50);
    color: var(--gray-700);
}
.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 18px 24px;
}


/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .hero-grid { grid-template-columns: 1fr; gap: 40px; }
    .hero h1 { font-size: 2.6rem; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .trust-grid { grid-template-columns: 1fr; gap: 40px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
    .navbar .container { flex-wrap: wrap; height: auto; padding: 12px 0; }
    .nav-links { gap: 16px; flex-wrap: wrap; }
    .nav-links a { font-size: 0.85rem; }
    .hero h1 { font-size: 2rem; }
    .product-grid { grid-template-columns: 1fr; }
    .step-item { flex-wrap: wrap; border-radius: var(--radius); }
    .footer-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 1.6rem; }
    .hero-image { padding: 24px 16px; }
    .stat-grid { gap: 8px; }
    .stat-item .num { font-size: 1.4rem; }
}