:root {
    --color-primary: #1f6bff;
    --color-primary-dark: #0d47c6;
    --color-secondary: #1ac4a4;
    --color-bg: #f5f7fb;
    --color-text: #1a2233;
    --color-muted: #5a657a;
    --color-border: #e1e7f0;
    --color-white: #ffffff;
    --shadow-soft: 0 15px 40px rgba(23, 52, 101, 0.08);
    --shadow-card: 0 12px 30px rgba(20, 40, 80, 0.12);
    --max-width: 1120px;
    font-family: "PingFang SC", "Microsoft YaHei", "Heiti SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--color-text);
    background-color: var(--color-bg);
    font-size: 16px;
    line-height: 1.8;
    color-scheme: light;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease, opacity 0.2s ease;
}

a:hover,
a:focus-visible {
    color: var(--color-primary);
}

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

.container {
    width: min(92%, var(--max-width));
    margin: 0 auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 999;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(17, 27, 56, 0.08);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 0;
}

.logo {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.logo-mark {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.08em;
}

.logo-tagline {
    font-size: 0.82rem;
    color: var(--color-muted);
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 24px;
}

.site-nav ul {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 28px;
    margin: 0;
    padding: 0;
}

.site-nav a {
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 4px 0;
}

.site-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 100%;
    height: 2px;
    background: var(--color-primary);
    opacity: 0;
    transform: scaleX(0.3);
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
    opacity: 1;
    transform: scaleX(1);
}

.nav-toggle {
    display: none;
    background: var(--color-primary);
    color: var(--color-white);
    border: none;
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
    background: var(--color-primary-dark);
    transform: translateY(-1px);
}

.hero {
    padding: 120px 0 80px;
    background: radial-gradient(120% 120% at 10% 10%, rgba(32, 107, 255, 0.16), transparent 62%),
        radial-gradient(100% 100% at 90% 0, rgba(26, 196, 164, 0.16), transparent 60%),
        linear-gradient(180deg, var(--color-white) 0%, #f8faff 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 48px;
    align-items: center;
}

.hero h1 {
    font-size: clamp(2.2rem, 3.2vw + 1rem, 3.2rem);
    line-height: 1.25;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.05rem;
    color: var(--color-muted);
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.hero-highlight {
    background: var(--color-white);
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow-soft);
}

.hero-highlight ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 16px;
}

.hero-highlight li {
    font-weight: 600;
    display: flex;
    gap: 12px;
    align-items: center;
}

.hero-highlight li::before {
    content: "•";
    color: var(--color-secondary);
    font-size: 1.6rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    border: 1px solid transparent;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn.primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    box-shadow: 0 10px 25px rgba(31, 107, 255, 0.25);
}

.btn.primary:hover,
.btn.primary:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(31, 107, 255, 0.32);
}

.btn.secondary {
    background: var(--color-white);
    color: var(--color-primary);
    border-color: rgba(31, 107, 255, 0.3);
}

.btn.secondary:hover,
.btn.secondary:focus-visible {
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.section {
    padding: 96px 0;
    scroll-margin-top: 110px;
}

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

.section-header {
    text-align: center;
    margin-bottom: 54px;
}

.section-header h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: -12px;
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 999px;
}

.section-header p {
    color: var(--color-muted);
    margin: 0 auto;
    max-width: 580px;
}

.section:target {
    animation: section-glow 1.2s ease;
}

@keyframes section-glow {
    0% {
        box-shadow: 0 0 0 rgba(31, 107, 255, 0);
    }
    40% {
        box-shadow: 0 10px 40px rgba(31, 107, 255, 0.18);
    }
    100% {
        box-shadow: 0 0 0 rgba(31, 107, 255, 0);
    }
}

.about-content {
    display: grid;
    gap: 40px;
}

.about-highlights {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.about-highlights article {
    background: var(--color-white);
    border-radius: 18px;
    padding: 28px;
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.about-highlights article:hover,
.about-highlights article:focus-within {
    transform: translateY(-6px);
    box-shadow: var(--shadow-card);
}

.about-highlights h3 {
    margin-bottom: 12px;
    font-size: 1.15rem;
}

.news-list {
    display: grid;
    gap: 24px;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.news-item {
    background: var(--color-white);
    border-radius: 18px;
    padding: 28px;
    display: grid;
    gap: 12px;
    border: 1px solid rgba(31, 107, 255, 0.08);
    box-shadow: var(--shadow-soft);
    transition: transform 0.2s ease, border 0.2s ease, box-shadow 0.2s ease;
}

.news-item:hover,
.news-item:focus-within {
    transform: translateY(-6px);
    border-color: rgba(31, 107, 255, 0.2);
    box-shadow: var(--shadow-card);
}

.news-item time {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 600;
}

.news-item h3 {
    font-size: 1.15rem;
    margin: 0;
}

.news-item p {
    color: var(--color-muted);
    margin: 0;
}

.news-link {
    font-weight: 600;
    color: var(--color-primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.news-link::after {
    content: "→";
    transition: transform 0.2s ease;
}

.news-link:hover::after,
.news-link:focus-visible::after {
    transform: translateX(4px);
}

.product-grid {
    display: grid;
    gap: 28px;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.product-card {
    background: var(--color-white);
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(31, 107, 255, 0.08);
    display: grid;
    gap: 16px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border 0.2s ease;
}

.product-card:hover,
.product-card:focus-within {
    transform: translateY(-6px);
    border-color: rgba(26, 196, 164, 0.22);
    box-shadow: var(--shadow-card);
}

.product-card h3 {
    margin: 0;
    font-size: 1.2rem;
}

.product-card p {
    color: var(--color-muted);
    margin: 0;
}

.product-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 8px;
    color: var(--color-text);
}

.product-card li {
    position: relative;
    padding-left: 20px;
}

.product-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.case-list {
    display: grid;
    gap: 28px;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.case-card {
    background: rgba(31, 107, 255, 0.04);
    border-radius: 18px;
    padding: 28px;
    display: grid;
    gap: 12px;
    border: 1px solid rgba(31, 107, 255, 0.1);
    transition: transform 0.2s ease, border 0.2s ease, box-shadow 0.2s ease;
}

.case-card:hover,
.case-card:focus-within {
    transform: translateY(-6px);
    border-color: rgba(31, 107, 255, 0.24);
    box-shadow: var(--shadow-card);
}

.case-card h3 {
    margin: 0;
    font-size: 1.15rem;
}

.case-card p {
    color: var(--color-muted);
    margin: 0;
}

.case-tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    background: var(--color-white);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 0.85rem;
}

.contact-section {
    background: linear-gradient(140deg, rgba(31, 107, 255, 0.08), rgba(26, 196, 164, 0.08));
}

.contact-content {
    display: grid;
    gap: 32px;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    align-items: stretch;
}

.contact-details,
.contact-cta {
    background: var(--color-white);
    border-radius: 20px;
    padding: 32px;
    box-shadow: var(--shadow-soft);
}

.contact-details p,
.contact-details a {
    margin: 0 0 12px;
    color: var(--color-text);
}

.contact-details a {
    font-weight: 600;
}

.contact-cta h3 {
    margin-top: 0;
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.contact-cta p {
    margin-bottom: 20px;
    color: var(--color-muted);
}

.site-footer {
    background: #0f1a33;
    color: rgba(255, 255, 255, 0.7);
    padding: 40px 0;
    text-align: center;
    font-size: 0.9rem;
}

.site-footer p {
    margin: 6px 0;
}

.site-footer .police-beian {
    margin-top: 12px;
}

.site-footer .police-beian a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    column-gap: 6px;
    row-gap: 4px;
    flex-wrap: nowrap;
    padding: 4px 12px;
    border-radius: 999px;
    color: inherit;
    background: rgba(255, 255, 255, 0.08);
}

.site-footer .police-beian a:hover,
.site-footer .police-beian a:focus-visible {
    color: rgba(255, 255, 255, 0.95);
    background: rgba(255, 255, 255, 0.14);
}

.site-footer .police-beian img {
    height: 18px;
    width: auto;
    display: inline-block;
}

@media (max-width: 960px) {
    .site-header .container {
        padding: 16px 0;
    }

    .hero {
        padding: 100px 0 70px;
    }
}

@media (max-width: 768px) {
    .site-nav {
        position: relative;
    }

    .nav-toggle {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .site-nav ul {
        position: absolute;
        right: 0;
        top: calc(100% + 12px);
        background: var(--color-white);
        border-radius: 16px;
        box-shadow: var(--shadow-card);
        padding: 18px 22px;
        display: none;
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
        min-width: 200px;
    }

    .site-nav:focus-within ul,
.site-nav:hover ul,
.site-nav.is-open ul {
        display: flex;
    }

    .hero {
        padding: 92px 0 60px;
    }

    .section {
        padding: 80px 0;
    }

    .about-highlights,
    .news-list,
    .product-grid,
    .case-list,
    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-highlight {
        padding: 26px;
    }

    .btn {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}