*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    color: #1e293b;
    background: radial-gradient(circle at top, #020617 0, #020617 40%, #0f172a 100%);
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
}

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

.wrap {
    width: min(1120px, 100% - 32px);
    margin-inline: auto;
}

.site-header {
    border-bottom: 1px solid rgba(148, 163, 184, 0.25);
    padding: 20px 0 10px;
    color: #e5e7eb;
}

.site-header h1 {
    font-size: 1.9rem;
    font-weight: 700;
    text-align: center;
}

.site-header .subtitle {
    margin-top: 6px;
    text-align: center;
    font-size: 0.9rem;
    color: #9ca3af;
}

.main-nav {
    margin-top: 14px;
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.95rem;
}

.main-nav a {
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid transparent;
    color: #e5e7eb;
}

.main-nav a:hover {
    border-color: rgba(94, 234, 212, 0.5);
    background: rgba(15, 23, 42, 0.8);
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 32px;
    align-items: center;
    padding: 32px 0 12px;
}

.hero-text h2 {
    font-size: 2.1rem;
    color: #f9fafb;
    margin-bottom: 12px;
}

.hero-text p {
    color: #cbd5f5;
    line-height: 1.7;
    font-size: 0.98rem;
    margin-bottom: 20px;
}

.hero-image img {
    border-radius: 20px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.8);
    object-fit: cover;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    letter-spacing: 0.03em;
    background: linear-gradient(135deg, #22c55e, #4ade80);
    color: #022c22;
    box-shadow: 0 10px 30px rgba(34, 197, 94, 0.4);
    font-size: 0.96rem;
}

.btn-primary:hover {
    filter: brightness(1.05);
}

.btn-outline {
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid rgba(148, 163, 184, 0.6);
    background: rgba(15, 23, 42, 0.7);
    color: #e5e7eb;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-outline:hover {
    border-color: #67e8f9;
}

.section-intro {
    color: #cbd5e1;
    font-size: 0.95rem;
    text-align: center;
    margin-top: 6px;
}

.plans {
    margin-top: 32px;
    padding-bottom: 20px;
}

.plans h2 {
    text-align: center;
    color: #f9fafb;
    font-size: 1.6rem;
}

.plan-grid {
    margin-top: 20px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.plan-card {
    background: radial-gradient(circle at top, #0f172a, #020617);
    border-radius: 18px;
    padding: 16px 16px 18px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    color: #e5e7eb;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.plan-image img {
    border-radius: 14px;
    border: 1px solid rgba(148, 163, 184, 0.6);
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.9);
    object-fit: cover;
    width: 100%;
    height: 180px;
}

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

.price {
    font-size: 1.1rem;
    font-weight: 600;
    color: #4ade80;
}

.feature-list {
    list-style: none;
    font-size: 0.9rem;
    color: #cbd5e1;
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 4px;
}

.why-us {
    margin: 10px 0 36px;
    padding: 20px 18px 24px;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(8, 47, 73, 0.9));
    border: 1px solid rgba(148, 163, 184, 0.5);
    color: #e5e7eb;
}

.why-us h2 {
    font-size: 1.4rem;
    margin-bottom: 12px;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
    font-size: 0.92rem;
    color: #cbd5e1;
}

.why-grid h3 {
    margin-bottom: 4px;
    color: #e5e7eb;
}

.site-footer {
    border-top: 1px solid rgba(148, 163, 184, 0.25);
    padding: 18px 0 24px;
    margin-top: 12px;
    color: #9ca3af;
    font-size: 0.88rem;
    text-align: center;
    background: rgba(15, 23, 42, 0.95);
}

.site-footer a {
    color: #67e8f9;
}

.site-footer a:hover {
    text-decoration: underline;
}

.side-service {
    position: fixed;
    top: 50%;
    right: 18px;
    transform: translateY(-50%);
    z-index: 50;
}

.side-service a {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 8px 10px;
    border-radius: 999px;
    background: linear-gradient(135deg, #38bdf8, #1d4ed8);
    color: #eff6ff;
    font-size: 0.86rem;
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.7);
}

.side-service a:hover {
    filter: brightness(1.08);
}

.back-to-top {
    position: fixed;
    right: 22px;
    bottom: 26px;
    width: 40px;
    height: 40px;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    background: radial-gradient(circle at 30% 0, #fbbf24, #e11d48);
    color: #fefce8;
    font-weight: 700;
    display: none;
    box-shadow: 0 14px 30px rgba(190, 24, 93, 0.65);
}

.back-to-top:hover {
    filter: brightness(1.05);
}

.order-layout {
    margin: 26px 0 24px;
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 24px;
}

.order-products h2,
.order-form-wrapper h2 {
    color: #f9fafb;
    margin-bottom: 10px;
}

.order-product-card {
    background: rgba(15, 23, 42, 0.9);
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    padding: 12px 12px 14px;
    color: #e5e7eb;
    margin-bottom: 14px;
}

.order-product-card img {
    border-radius: 12px;
    margin-bottom: 8px;
    object-fit: cover;
}

.order-product-card h3 {
    font-size: 1.02rem;
    margin-bottom: 4px;
}

.order-product-card p {
    font-size: 0.9rem;
    color: #cbd5e1;
    margin-bottom: 4px;
}

.order-product-card ul {
    list-style: disc;
    padding-left: 18px;
    font-size: 0.86rem;
    color: #e5e7eb;
}

.order-form-wrapper {
    background: rgba(15, 23, 42, 0.9);
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    padding: 16px 16px 18px;
    color: #e5e7eb;
}

.order-form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.order-form label {
    font-size: 0.88rem;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.order-form input,
.order-form select,
.order-form textarea {
    border-radius: 10px;
    border: 1px solid rgba(148, 163, 184, 0.6);
    background: rgba(15, 23, 42, 0.9);
    color: #e5e7eb;
    padding: 7px 10px;
    font-size: 0.9rem;
}

.order-form input:focus,
.order-form select:focus,
.order-form textarea:focus {
    outline: none;
    border-color: #67e8f9;
    box-shadow: 0 0 0 1px rgba(103, 232, 249, 0.7);
}

.order-form textarea {
    resize: vertical;
}

.full-width {
    width: 100%;
    justify-content: center;
}

.form-tip {
    margin-top: 4px;
    font-size: 0.82rem;
    color: #9ca3af;
}

.product-detail-page {
    margin: 26px 0 26px;
}

.product-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 24px;
    align-items: center;
    margin-bottom: 20px;
}

.product-hero .hero-image img {
    border-radius: 18px;
    border: 1px solid rgba(148, 163, 184, 0.6);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.85);
    object-fit: cover;
}

.product-hero .hero-text h2 {
    font-size: 1.6rem;
    color: #f9fafb;
    margin-bottom: 10px;
}

.product-hero .hero-text p {
    color: #cbd5e1;
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 12px;
}

.price-large {
    font-size: 1.2rem;
    color: #4ade80;
    font-weight: 600;
    margin-bottom: 12px;
}

.detail-section {
    margin-top: 22px;
    background: rgba(15, 23, 42, 0.9);
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.4);
    padding: 16px 16px 18px;
    color: #e5e7eb;
}

.detail-section h2 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.columns-2 {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.columns-2 ul {
    list-style: disc;
    padding-left: 18px;
    font-size: 0.9rem;
    color: #e5e7eb;
}

.review-list {
    display: grid;
    gap: 10px;
    font-size: 0.9rem;
}

.review-item {
    background: rgba(15, 23, 42, 0.9);
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.5);
    padding: 10px 12px;
}

.review-item h3 {
    font-size: 0.95rem;
    margin-bottom: 4px;
    color: #e5e7eb;
}

.review-item p {
    color: #cbd5e1;
    line-height: 1.6;
}

.stars {
    margin-top: 4px;
    color: #facc15;
    font-size: 0.9rem;
}

@media (max-width: 960px) {
    .hero,
    .order-layout,
    .product-hero,
    .columns-2 {
        grid-template-columns: minmax(0, 1fr);
    }

    .plan-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .why-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .side-service {
        top: auto;
        bottom: 90px;
        transform: none;
    }
}

@media (max-width: 640px) {
    .hero {
        padding-top: 22px;
    }

    .hero-text h2 {
        font-size: 1.5rem;
    }

    .plan-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .why-grid {
        grid-template-columns: minmax(0, 1fr);
    }

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