/* ============================================================
   顺新光电 - 光电产品展示网站样式
   配色：深海军蓝 + 青蓝光感（呼应光电主题）
   ============================================================ */

:root {
    --c-bg: #f4f7fb;
    --c-bg-alt: #ffffff;
    --c-ink: #0b1727;
    --c-ink-soft: #3a4a5f;
    --c-muted: #6b7a8f;
    --c-line: #e2e8f0;

    --c-primary: #0077b6;
    --c-primary-dark: #023e8a;
    --c-accent: #00b4d8;
    --c-accent-soft: #caf0f8;
    --c-glow: #90e0ef;

    --c-dark: #03045e;
    --c-dark-2: #0b1727;

    --radius: 14px;
    --radius-sm: 8px;
    --shadow-sm: 0 2px 8px rgba(11, 23, 39, .06);
    --shadow: 0 12px 32px rgba(11, 23, 39, .10);
    --shadow-lg: 0 24px 60px rgba(3, 6, 94, .18);

    --container: 1600px;
    --ease: cubic-bezier(.22, .61, .36, 1);
}

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

html {
    scroll-behavior: smooth;
    /* 锚点定位时为 sticky 导航预留空间，避免区块标题被遮挡 */
    scroll-padding-top: 96px;
}

body {
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC",
                 "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--c-ink);
    background: var(--c-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, .85);
    backdrop-filter: saturate(180%) blur(14px);
    -webkit-backdrop-filter: saturate(180%) blur(14px);
    border-bottom: 1px solid var(--c-line);
    transition: box-shadow .3s var(--ease);
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }

.nav-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 68px;
}

.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { display: flex; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 17px; color: var(--c-dark); letter-spacing: .5px; }
.brand-text small { font-size: 10.5px; color: var(--c-muted); letter-spacing: 1.5px; }

.main-nav { display: flex; gap: 28px; }
.main-nav a {
    font-size: 14.5px;
    color: var(--c-ink-soft);
    font-weight: 500;
    position: relative;
    padding: 6px 0;
    transition: color .2s var(--ease);
}
.main-nav a::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    width: 0; height: 2px;
    background: linear-gradient(90deg, var(--c-accent), var(--c-primary));
    transition: width .3s var(--ease);
}
.main-nav a:hover { color: var(--c-primary); }
.main-nav a:hover::after { width: 100%; }

.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.menu-toggle span {
    width: 22px; height: 2px;
    background: var(--c-ink);
    transition: transform .3s var(--ease), opacity .2s var(--ease);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    transition: transform .2s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease);
}
.btn-primary {
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary));
    color: #fff;
    box-shadow: 0 8px 20px rgba(0, 119, 182, .35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(0, 119, 182, .45); }
.btn-ghost {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, .55);
}
.btn-ghost:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }
.btn-block { width: 100%; }

/* ---------- Hero ---------- */
.hero .container { max-width: none; padding: 0 48px; }
.hero {
    position: relative;
    color: #fff;
    overflow: hidden;
    padding: 110px 0 90px;
    background: linear-gradient(135deg, #03045e 0%, #023e8a 45%, #0077b6 100%);
}
.hero-bg {
    position: absolute; inset: 0;
    background:
        radial-gradient(circle at 18% 30%, rgba(144, 224, 239, .35), transparent 40%),
        radial-gradient(circle at 82% 70%, rgba(0, 180, 216, .30), transparent 45%),
        radial-gradient(circle at 50% 100%, rgba(202, 240, 248, .18), transparent 55%);
    pointer-events: none;
}
.hero-bg::after {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
    -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 75%);
}
.hero-inner { position: relative; z-index: 2; max-width: none; }
.hero-eyebrow {
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--c-glow);
    margin-bottom: 18px;
    font-weight: 600;
}
.hero-title {
    font-size: clamp(32px, 5vw, 52px);
    line-height: 1.18;
    font-weight: 800;
    letter-spacing: -0.5px;
    margin-bottom: 20px;
    background: linear-gradient(120deg, #ffffff 30%, #caf0f8 70%, #90e0ef);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-sub {
    font-size: 17px;
    color: rgba(255, 255, 255, .85);
    max-width: 640px;
    margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; }

.hero-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    padding-top: 32px;
    border-top: 1px solid rgba(255, 255, 255, .15);
}
.stat { display: flex; flex-direction: column; }
.stat strong {
    font-size: 30px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
}
.stat span {
    font-size: 13px;
    color: rgba(255, 255, 255, .7);
    margin-top: 6px;
}

/* ---------- 通用 section ---------- */
.section { padding: 88px 0; }
.section-alt { background: var(--c-bg-alt); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
.section-eyebrow {
    font-size: 12px;
    letter-spacing: 3px;
    color: var(--c-accent);
    font-weight: 600;
    margin-bottom: 12px;
}
.section-title {
    font-size: clamp(26px, 3.4vw, 36px);
    font-weight: 800;
    color: var(--c-dark);
    letter-spacing: -.5px;
    margin-bottom: 14px;
}
.section-desc { color: var(--c-muted); font-size: 15.5px; }

.loading {
    text-align: center;
    color: var(--c-muted);
    padding: 48px 0;
    grid-column: 1 / -1;
}

/* ---------- 分类卡片 ---------- */
.category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
    margin-bottom: 36px;
}
.category-grid:empty { display: none; }
.cat-card {
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    padding: 28px 24px;
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}
.cat-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 3px;
    background: linear-gradient(90deg, var(--c-accent), var(--c-primary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .3s var(--ease);
}
.cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
.cat-card:hover::before { transform: scaleX(1); }
.cat-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--c-accent-soft), var(--c-accent));
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 18px;
    color: var(--c-dark);
}
.cat-card h3 { font-size: 18px; color: var(--c-dark); margin-bottom: 6px; font-weight: 700; }
.cat-brand {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: var(--c-primary);
    background: var(--c-accent-soft);
    padding: 2px 10px;
    border-radius: 999px;
    margin-bottom: 8px;
    letter-spacing: .5px;
}
.cat-card p { font-size: 14px; color: var(--c-muted); margin-bottom: 14px; }
.cat-card .cat-count {
    font-size: 12.5px;
    color: var(--c-primary);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* ---------- 工具栏 ---------- */
.toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}
.filter-chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
    padding: 8px 18px;
    border-radius: 999px;
    font-size: 13.5px;
    font-weight: 500;
    color: var(--c-ink-soft);
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
    transition: all .2s var(--ease);
}
.chip:hover { border-color: var(--c-accent); color: var(--c-primary); }
.chip.active {
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary));
    color: #fff;
    border-color: transparent;
    box-shadow: 0 6px 14px rgba(0, 119, 182, .3);
}
.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
    border-radius: 999px;
    color: var(--c-muted);
    min-width: 280px;
    transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.search-box:focus-within {
    border-color: var(--c-accent);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, .15);
}
.search-box input {
    border: none; outline: none; background: none;
    font-size: 14px; color: var(--c-ink);
    width: 100%; font-family: inherit;
}

/* ---------- 产品卡片 ---------- */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.product-card {
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
    display: flex;
    flex-direction: column;
    cursor: pointer;
    animation: fadeUp .5s var(--ease) both;
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.product-media {
    position: relative;
    aspect-ratio: 1 / 1;
    background: linear-gradient(135deg, #eef5fb, #dceef6);
    overflow: hidden;
}
.product-media img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform .4s var(--ease);
}
.product-card:hover .product-media img { transform: scale(1.06); }
.product-badge {
    position: absolute;
    top: 12px; left: 12px;
    background: rgba(3, 6, 94, .85);
    color: #fff;
    font-size: 11.5px;
    padding: 5px 12px;
    border-radius: 999px;
    backdrop-filter: blur(4px);
}
.product-brand {
    position: absolute;
    top: 12px; right: 12px;
    background: linear-gradient(135deg, #f77f00, #fcbf49);
    color: #fff;
    font-size: 10.5px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 999px;
    letter-spacing: .5px;
    z-index: 2;
}
.modal-brand {
    position: absolute;
    top: 12px; right: 12px;
    background: linear-gradient(135deg, #f77f00, #fcbf49);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 999px;
    letter-spacing: .5px;
    z-index: 2;
}
.product-price {
    position: absolute;
    bottom: 12px; right: 12px;
    background: rgba(255, 255, 255, .92);
    color: var(--c-primary-dark);
    font-size: 13px;
    font-weight: 700;
    padding: 5px 11px;
    border-radius: 8px;
}
.product-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.product-model {
    font-size: 12px;
    color: var(--c-accent);
    letter-spacing: 1px;
    font-weight: 600;
    margin-bottom: 6px;
}
.product-name {
    font-size: 17px;
    font-weight: 700;
    color: var(--c-dark);
    margin-bottom: 8px;
    line-height: 1.35;
}
.product-tag {
    font-size: 13.5px;
    color: var(--c-muted);
    margin-bottom: 16px;
    flex: 1;
}
.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}
.spec-pill {
    font-size: 11.5px;
    color: var(--c-ink-soft);
    background: var(--c-bg);
    border: 1px solid var(--c-line);
    padding: 4px 10px;
    border-radius: 6px;
}
.product-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--c-primary);
    font-size: 14px;
    font-weight: 600;
    transition: gap .2s var(--ease);
}
.product-card:hover .product-cta { gap: 12px; }

.empty-hint { text-align: center; color: var(--c-muted); padding: 40px 0; }

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---------- 关于我们 ---------- */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 56px;
    align-items: center;
}
.about-text .section-title { text-align: left; margin-bottom: 18px; }
.about-text p { color: var(--c-ink-soft); margin-bottom: 22px; }
.about-points { list-style: none; display: grid; gap: 14px; }
.about-points li {
    padding-left: 26px;
    position: relative;
    color: var(--c-ink-soft);
    font-size: 14.5px;
}
.about-points li::before {
    content: "";
    position: absolute;
    left: 0; top: 7px;
    width: 14px; height: 14px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary));
    box-shadow: 0 0 0 4px rgba(0, 180, 216, .15);
}
.about-points strong { color: var(--c-dark); display: block; font-size: 15.5px; margin-bottom: 2px; }

.about-visual {
    position: relative;
    aspect-ratio: 1;
    max-width: 380px;
    margin: 0 auto;
}
.orb {
    position: absolute;
    inset: 30%;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #fff, var(--c-glow) 40%, var(--c-accent) 75%, var(--c-primary));
    box-shadow: 0 0 60px rgba(0, 180, 216, .5), inset 0 0 40px rgba(3, 6, 94, .3);
    animation: pulse 4s ease-in-out infinite;
}
.ring {
    position: absolute;
    inset: 0;
    border-radius: 50%;
    border: 1.5px solid rgba(0, 119, 182, .25);
    animation: spin 18s linear infinite;
}
.ring.r2 { inset: 12%; border-color: rgba(0, 180, 216, .35); border-style: dashed; animation-duration: 12s; animation-direction: reverse; }
.ring.r3 { inset: 22%; border-color: rgba(144, 224, 239, .5); animation-duration: 8s; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.08); } }

/* ---------- 联系我们 ---------- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}
.contact-list { list-style: none; margin-top: 24px; display: grid; gap: 16px; }
.contact-list li {
    display: flex;
    flex-direction: column;
    padding: 16px 20px;
    background: var(--c-bg);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--c-accent);
}
.contact-list span { font-size: 12px; color: var(--c-muted); margin-bottom: 4px; letter-spacing: 1px; }
.contact-list strong { font-size: 15.5px; color: var(--c-dark); font-weight: 600; }

.contact-form {
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow-sm);
}
.contact-form h3 { font-size: 19px; color: var(--c-dark); margin-bottom: 20px; }
.contact-form label {
    display: block;
    font-size: 13px;
    color: var(--c-ink-soft);
    font-weight: 500;
    margin-bottom: 14px;
}
.contact-form input,
.contact-form textarea {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 10px 14px;
    border: 1px solid var(--c-line);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: inherit;
    color: var(--c-ink);
    background: var(--c-bg);
    transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--c-accent);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, .15);
    background: #fff;
}
.form-feedback { font-size: 13.5px; margin-top: 12px; min-height: 18px; }
.form-feedback.ok { color: #0a7d3a; }
.form-feedback.err { color: #c0392b; }

/* ---------- 页脚 ---------- */
.site-footer {
    background: var(--c-dark-2);
    color: rgba(255, 255, 255, .7);
    padding: 48px 0 28px;
}
.footer-inner {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1.4fr;
    gap: 32px;
    align-items: start;
}
.footer-brand strong { color: #fff; font-size: 18px; display: block; margin-bottom: 6px; }
.footer-brand p { font-size: 13.5px; }
.footer-nav { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a { font-size: 14px; transition: color .2s var(--ease); }
.footer-nav a:hover { color: var(--c-glow); }
.footer-copy {
    grid-column: 1 / -1;
    border-top: 1px solid rgba(255, 255, 255, .12);
    margin-top: 12px;
    padding-top: 20px;
    font-size: 12.5px;
    color: rgba(255, 255, 255, .5);
    text-align: center;
}
.footer-beian {
    grid-column: 1 / -1;
    text-align: center;
    font-size: 12.5px;
    margin-top: 6px;
}
.footer-beian a {
    color: rgba(255, 255, 255, .55);
    text-decoration: none;
    transition: color .2s var(--ease);
}
.footer-beian a:hover { color: var(--c-glow); }

/* ---------- 弹窗 ---------- */
.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}
.modal.open { display: flex; animation: fadeIn .25s var(--ease); }
.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(3, 6, 94, .55);
    backdrop-filter: blur(6px);
}
.modal-card {
    position: relative;
    background: #fff;
    border-radius: 18px;
    max-width: 880px;
    width: 100%;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    animation: popIn .3s var(--ease);
}
.modal-close {
    position: absolute;
    top: 14px; right: 14px;
    z-index: 5;
    width: 36px; height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .9);
    color: var(--c-ink);
    font-size: 24px;
    line-height: 1;
    display: flex; align-items: center; justify-content: center;
    box-shadow: var(--shadow-sm);
    transition: transform .2s var(--ease), background .2s var(--ease);
}
.modal-close:hover { transform: rotate(90deg); background: #fff; }
.modal-body {
    max-height: 90vh;
    overflow-y: auto;
}
.modal-hero {
    position: relative;
    aspect-ratio: 1 / 1;
    background: #eef3f9;
    overflow: hidden;
}
.modal-hero img { width: 100%; height: 100%; object-fit: contain; display: block; }
.modal-hero .modal-badge {
    position: absolute; top: 18px; left: 18px;
    background: rgba(3, 6, 94, .85);
    color: #fff;
    font-size: 12.5px;
    padding: 6px 14px; border-radius: 999px;
    backdrop-filter: blur(4px);
}
.modal-content { padding: 32px 36px 36px; }
.modal-content .m-model { color: var(--c-accent); font-size: 13px; font-weight: 600; letter-spacing: 1px; }
.modal-content h2 { font-size: 26px; color: var(--c-dark); margin: 6px 0 10px; }
.modal-content .m-tag { color: var(--c-ink-soft); font-size: 15px; margin-bottom: 22px; }
.modal-content .m-desc { color: var(--c-ink-soft); font-size: 14.5px; line-height: 1.75; margin-bottom: 26px; }
.modal-section-title {
    font-size: 14px; color: var(--c-dark);
    font-weight: 700; letter-spacing: .5px;
    margin-bottom: 14px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--c-line);
}
.spec-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 26px;
}
.spec-table td { padding: 11px 14px; font-size: 14px; border-bottom: 1px solid var(--c-line); }
.spec-table td:first-child { color: var(--c-muted); width: 38%; background: var(--c-bg); }
.spec-table td:last-child { color: var(--c-ink); font-weight: 500; }
.feature-list { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.feature-list span {
    font-size: 13px;
    color: var(--c-primary-dark);
    background: var(--c-accent-soft);
    padding: 6px 14px;
    border-radius: 999px;
    font-weight: 500;
}
.modal-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 22px;
    border-top: 1px solid var(--c-line);
}
.modal-price { font-size: 14px; color: var(--c-muted); }
.modal-price strong { color: var(--c-primary); font-size: 24px; font-weight: 800; }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes popIn { from { opacity: 0; transform: translateY(20px) scale(.97); } to { opacity: 1; transform: none; } }

/* ---------- 回到顶部 ---------- */
.back-to-top {
    position: fixed;
    bottom: 28px; right: 28px;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary));
    color: #fff;
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 22px rgba(0, 119, 182, .4);
    z-index: 90;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity .25s var(--ease), transform .25s var(--ease);
}
.back-to-top.show { opacity: 1; transform: none; }
.back-to-top:hover { transform: translateY(-2px); }

/* ---------- 行业新闻 ---------- */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.news-card {
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
    animation: fadeUp .5s var(--ease) both;
}
.news-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.news-media {
    position: relative;
    aspect-ratio: 4 / 3;
    background: linear-gradient(135deg, #023e8a, #0077b6);
    overflow: hidden;
    display: block;
}
.news-media img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: transform .4s var(--ease);
}
.news-card:hover .news-media img { transform: scale(1.06); }
.news-cat {
    position: absolute;
    top: 12px; left: 12px;
    background: rgba(0, 119, 182, .9);
    color: #fff;
    font-size: 11.5px;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 999px;
    backdrop-filter: blur(4px);
    letter-spacing: .5px;
}
.news-body { padding: 20px 22px 22px; flex: 1; display: flex; flex-direction: column; }
.news-date {
    font-size: 12.5px;
    color: var(--c-muted);
    margin-bottom: 8px;
    letter-spacing: .5px;
}
.news-title {
    font-size: 16.5px;
    font-weight: 700;
    color: var(--c-dark);
    line-height: 1.4;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-summary {
    font-size: 13.5px;
    color: var(--c-ink-soft);
    line-height: 1.65;
    flex: 1;
    margin-bottom: 14px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--c-primary);
    font-size: 13.5px;
    font-weight: 600;
    transition: gap .2s var(--ease);
}
.news-card:hover .news-more { gap: 12px; }

/* ---------- 置顶要闻条 ---------- */
.pin-bar {
    background: #fff;
    border-bottom: 1px solid var(--c-line);
}
.pin-inner {
    display: flex;
    align-items: center;
    gap: 12px;
    min-height: 42px;
    padding-top: 6px;
    padding-bottom: 6px;
    min-width: 0;
}
.pin-tag {
    flex-shrink: 0;
    background: #e63946;
    color: #fff;
    font-size: 11.5px;
    font-weight: 700;
    letter-spacing: 1.5px;
    padding: 4px 10px;
    border-radius: 4px;
}
.pin-title {
    flex: 1;
    min-width: 0;
    text-align: left;
    font-size: 14px;
    font-weight: 600;
    color: var(--c-dark);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: color .2s var(--ease);
}
.pin-title:hover { color: var(--c-primary); }
.pin-arrow {
    flex-shrink: 0;
    font-size: 12.5px;
    color: var(--c-primary);
    cursor: pointer;
    white-space: nowrap;
}
.pin-arrow:hover { text-decoration: underline; }

/* 置顶新闻卡标记 */
.news-card.is-pinned {
    border-color: rgba(230, 57, 70, .5);
    box-shadow: 0 0 0 2px rgba(230, 57, 70, .1), var(--shadow-sm);
}
.news-pin {
    position: absolute;
    top: 12px;
    right: 12px;
    background: #e63946;
    color: #fff;
    font-size: 11.5px;
    font-weight: 700;
    padding: 5px 11px;
    border-radius: 999px;
    letter-spacing: 1.5px;
    box-shadow: 0 4px 12px rgba(230, 57, 70, .35);
}
@media (max-width: 600px) {
    .pin-title { font-size: 13px; }
    .pin-arrow { display: none; }
}

/* ---------- 行业覆盖 ---------- */
.industry-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 56px;
}
.industry-card {
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    padding: 26px 22px;
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
    position: relative;
    overflow: hidden;
    animation: fadeUp .5s var(--ease) both;
}
.industry-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 3px;
    background: linear-gradient(90deg, var(--c-accent), var(--c-primary));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .3s var(--ease);
}
.industry-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow);
    border-color: transparent;
}
.industry-card:hover::before { transform: scaleX(1); }
.industry-icon {
    width: 52px; height: 52px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--c-accent-soft), var(--c-accent));
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 16px;
    font-size: 26px;
}
.industry-card h3 {
    font-size: 17px;
    color: var(--c-dark);
    margin-bottom: 6px;
    font-weight: 700;
}
.industry-card > p {
    font-size: 13.5px;
    color: var(--c-muted);
    margin-bottom: 14px;
    line-height: 1.55;
}
.industry-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.industry-tags span {
    font-size: 11.5px;
    color: var(--c-primary);
    background: var(--c-accent-soft);
    padding: 4px 10px;
    border-radius: 6px;
    font-weight: 500;
}
.industry-tags .tag-link {
    cursor: pointer;
    transition: background .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.industry-tags .tag-link:hover {
    background: var(--c-primary);
    color: #fff;
    transform: translateY(-1px);
}
.desc-tip {
    display: inline-block;
    margin-top: 8px;
    font-size: 13px;
    color: var(--c-accent);
    font-weight: 500;
}

.industry-customers {
    background: linear-gradient(135deg, var(--c-dark) 0%, var(--c-primary-dark) 100%);
    border-radius: var(--radius);
    padding: 40px 36px;
    color: #fff;
    position: relative;
    overflow: hidden;
}
.industry-customers::before {
    content: "";
    position: absolute; inset: 0;
    background:
        radial-gradient(circle at 15% 30%, rgba(144, 224, 239, .25), transparent 40%),
        radial-gradient(circle at 85% 70%, rgba(0, 180, 216, .2), transparent 45%);
    pointer-events: none;
}
.industry-customers::after {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .03) 1px, transparent 1px);
    background-size: 36px 36px;
    pointer-events: none;
}
.industry-customers > * { position: relative; z-index: 1; }
.customers-label {
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--c-glow);
    font-weight: 600;
    margin-bottom: 22px;
    text-transform: uppercase;
}
/* 客户 / 品牌 Logo 墙 */
.logo-wall {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 14px;
}
.logo-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 18px 10px;
    background: rgba(255, 255, 255, .07);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 12px;
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    transition: transform .22s var(--ease), background .22s var(--ease), border-color .22s var(--ease);
}
.logo-item strong {
    color: #fff;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 1px;
    white-space: nowrap;
}
.logo-item span {
    font-size: 10px;
    color: rgba(255, 255, 255, .55);
    letter-spacing: 2px;
    white-space: nowrap;
}
a.logo-item { text-decoration: none; cursor: pointer; }
a.logo-item:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, .15);
    border-color: var(--c-glow);
}

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .industry-grid { grid-template-columns: repeat(2, 1fr); }
    .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
    .about-text .section-title { text-align: center; }
    .footer-inner { grid-template-columns: 1fr; text-align: center; }
    .footer-nav { align-items: center; }
}

@media (max-width: 720px) {
    .main-nav {
        position: fixed;
        top: 68px; right: 0;
        width: 70%;
        max-width: 280px;
        height: calc(100vh - 68px);
        background: #fff;
        flex-direction: column;
        padding: 28px 24px;
        gap: 18px;
        box-shadow: -10px 0 30px rgba(0, 0, 0, .1);
        transform: translateX(100%);
        transition: transform .3s var(--ease);
    }
    .main-nav.open { transform: none; }
    .menu-toggle { display: flex; }

    .hero { padding: 80px 0 60px; }
    .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 22px; }
    .hero-actions .btn { flex: 1; }

    .section { padding: 60px 0; }
    .toolbar { flex-direction: column; align-items: stretch; }
    .search-box { min-width: 0; }

    .category-grid, .product-grid, .news-grid, .industry-grid { grid-template-columns: 1fr; }
    .industry-customers { padding: 28px 22px; }
    .logo-wall { grid-template-columns: repeat(2, 1fr); gap: 10px; }
    .logo-item { padding: 14px 8px; }
    .logo-item strong { font-size: 14.5px; }
    .modal-content { padding: 24px 20px; }
    .modal-content h2 { font-size: 22px; }
    .modal-footer { flex-direction: column; gap: 14px; align-items: stretch; }
}

/* ============================================================
   高级感升级（动效 / 质感 / 微交互）— 纯增量，不改变布局功能
   ============================================================ */

/* 顶部滚动进度条 */
.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 3px;
    width: 0;
    z-index: 300;
    background: linear-gradient(90deg, var(--c-accent), var(--c-primary));
    box-shadow: 0 0 12px rgba(0, 180, 216, .55);
    transition: width .12s linear;
    pointer-events: none;
}

/* 页面首入淡入 */
@keyframes body-in { from { opacity: 0; } to { opacity: 1; } }
body { animation: body-in .5s var(--ease); }

/* 自定义滚动条与选中色 */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #edf2f8; }
::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--c-accent), var(--c-primary));
    border-radius: 10px;
    border: 2px solid #edf2f8;
}
::-webkit-scrollbar-thumb:hover { background: linear-gradient(var(--c-primary), var(--c-primary-dark)); }
::selection { background: rgba(0, 180, 216, .22); color: var(--c-dark); }

/* 导航滚动定位（scrollspy）激活态 —— 复用已有下划线 */
.main-nav a.active { color: var(--c-primary); font-weight: 600; }
.main-nav a.active::after { width: 100%; }

/* Hero 漂浮光斑 */
.hero-bg::before {
    content: "";
    position: absolute;
    width: 520px; height: 520px;
    left: -140px; top: -180px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(144, 224, 239, .28), transparent 65%);
    animation: orb-float 11s ease-in-out infinite;
    pointer-events: none;
}
.hero-bg > .orb {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
}
.hero-bg .orb-2 {
    width: 420px; height: 420px;
    right: -120px; bottom: -160px;
    background: radial-gradient(circle, rgba(0, 180, 216, .24), transparent 65%);
    animation: orb-float 13s ease-in-out infinite reverse;
}
@keyframes orb-float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(36px, 44px) scale(1.08); }
}

/* Hero 标题流光 */
.hero-title {
    background-size: 220% auto;
    animation: title-shine 7s linear infinite;
}
@keyframes title-shine { to { background-position: 220% center; } }

/* 主按钮扫光 */
.btn-primary { position: relative; overflow: hidden; isolation: isolate; }
.btn-primary::after {
    content: "";
    position: absolute;
    top: 0; left: -90%;
    width: 55%; height: 100%;
    background: linear-gradient(120deg, transparent, rgba(255, 255, 255, .42), transparent);
    transform: skewX(-20deg);
    transition: left .65s var(--ease);
    z-index: -1;
}
.btn-primary:hover::after { left: 130%; }

/* 区块标题滚动揭示 */
@keyframes head-in { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: none; } }
html.js .section .section-head {
    opacity: 0;
    transform: translateY(26px);
}
html.js .section.in-view .section-head {
    animation: head-in .7s var(--ease) both;
}
html.js .section .about-grid,
html.js .section .contact-grid { opacity: 0; transform: translateY(26px); }
html.js .section.in-view .about-grid,
html.js .section.in-view .contact-grid { animation: head-in .8s var(--ease) .08s both; }

/* 回到顶部质感 */
.back-to-top {
    box-shadow: 0 10px 26px rgba(2, 62, 138, .35);
}
.back-to-top:hover { box-shadow: 0 14px 32px rgba(2, 62, 138, .5); }

/* 尊重系统“减弱动态效果”偏好 */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: .001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: .001ms !important;
    }
    html.js .section .section-head,
    html.js .section .about-grid,
    html.js .section .contact-grid { opacity: 1 !important; transform: none !important; }
}

/* ============================================================
   高级感升级 第二期：专业图标 / 信任背书区 / 产品悬停浮层
   ============================================================ */

/* 行业卡片 SVG 图标（替换原 emoji，统一线框风格） */
.industry-icon { color: var(--c-dark); }
.industry-icon svg { width: 26px; height: 26px; display: block; }

/* ---------- 信任背书区（深色玻璃质感） ---------- */
.trust {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #03045e 0%, #023e8a 55%, #0077b6 100%);
}
.trust::before {
    content: "";
    position: absolute; inset: 0;
    background:
        radial-gradient(circle at 12% 25%, rgba(144, 224, 239, .22), transparent 42%),
        radial-gradient(circle at 88% 75%, rgba(0, 180, 216, .20), transparent 46%);
    pointer-events: none;
}
.trust::after {
    content: "";
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}
.trust .container { position: relative; z-index: 1; }
.trust .section-title { color: #fff; }
.trust .section-desc { color: rgba(255, 255, 255, .72); }
.trust-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
}
.trust-card {
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .16);
    border-radius: var(--radius);
    padding: 30px 24px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: transform .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease);
}
.trust-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, .14);
    border-color: rgba(144, 224, 239, .5);
}
.trust-icon {
    width: 50px; height: 50px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--c-accent), var(--c-glow));
    color: var(--c-dark);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 18px;
}
.trust-icon svg { width: 26px; height: 26px; display: block; }
.trust-value { margin-bottom: 8px; line-height: 1; }
.trust-num, .trust-num-static {
    font-size: 34px;
    font-weight: 800;
    color: #fff;
}
.trust-num-static { font-size: 30px; }
.trust-value em {
    font-style: normal;
    font-size: 14px;
    font-weight: 600;
    color: var(--c-glow);
    margin-left: 6px;
}
.trust-card h3 { color: #fff; font-size: 16.5px; margin-bottom: 8px; font-weight: 700; }
.trust-desc { color: rgba(255, 255, 255, .72); font-size: 13.5px; line-height: 1.65; }

/* ---------- 产品卡片悬停浮层 ---------- */
.product-badge, .product-price { z-index: 2; }
.product-overlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 22px 24px;
    background: linear-gradient(165deg, rgba(3, 6, 94, .55) 0%, rgba(3, 6, 94, .88) 100%);
    backdrop-filter: blur(2px);
    opacity: 0;
    transition: opacity .3s var(--ease);
}
.product-card:hover .product-overlay { opacity: 1; }
.ov-title {
    color: var(--c-glow);
    font-size: 11px;
    letter-spacing: 2.5px;
    font-weight: 700;
    margin-bottom: 14px;
}
.ov-list { list-style: none; display: grid; gap: 9px; margin-bottom: 16px; }
.ov-list li {
    color: #fff;
    font-size: 13px;
    line-height: 1.45;
    display: flex;
    align-items: baseline;
    gap: 8px;
}
.ov-list li::before {
    content: "";
    width: 5px; height: 5px;
    border-radius: 50%;
    background: var(--c-glow);
    flex: none;
    transform: translateY(-2px);
}
.ov-cta { color: var(--c-glow); font-size: 13px; font-weight: 600; }

/* 触屏设备无悬停，隐藏浮层避免遮挡点击 */
@media (hover: none) {
    .product-overlay { display: none; }
}

/* 信任区响应式 */
@media (max-width: 960px) {
    .trust-grid { grid-template-columns: repeat(2, 1fr); }
    .logo-wall { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 720px) {
    .trust-grid { grid-template-columns: 1fr; }
    .trust-card { padding: 26px 22px; }
}

/* ---------- Hero 真实场景图层 ---------- */
.hero-scene {
    position: absolute;
    inset: 0;
    z-index: 1;
    overflow: hidden;
    pointer-events: none;
}
.hero-scene img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .38;
    /* 左侧文字区保持干净，场景图向右侧渐入 */
    mask-image: linear-gradient(100deg, transparent 12%, rgba(0,0,0,.55) 48%, #000 78%);
    -webkit-mask-image: linear-gradient(100deg, transparent 12%, rgba(0,0,0,.55) 48%, #000 78%);
}
/* 场景图上再压一层品牌色渐变，保证文字对比度 */
.hero-scene::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(3, 4, 94, .55) 0%, rgba(2, 62, 138, .25) 55%, rgba(0, 119, 182, .15) 100%);
}
@media (max-width: 720px) {
    .hero-scene img { opacity: .25; }
}

/* ============================================================
   高级感升级 第三期：弹窗分栏 / 专业页脚 / 聚光悬停 / 细节打磨
   ============================================================ */

/* ---------- 区块标题装饰线 ---------- */
.section-head .section-title::after {
    content: "";
    display: block;
    width: 56px;
    height: 3px;
    margin: 14px auto 0;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--c-accent), var(--c-primary));
}

/* ---------- 卡片聚光悬停（跟随鼠标的柔光） ---------- */
.cat-card, .industry-card, .trust-card, .news-card, .product-card { position: relative; }
.cat-card::after, .industry-card::after, .trust-card::after,
.news-card::after, .product-card::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(240px circle at var(--mx, 50%) var(--my, 50%), rgba(0, 180, 216, .10), transparent 65%);
    opacity: 0;
    transition: opacity .3s var(--ease);
    pointer-events: none;
}
.cat-card:hover::after, .industry-card:hover::after, .trust-card:hover::after,
.news-card:hover::after, .product-card:hover::after { opacity: 1; }

/* 分类图标悬停微动效 */
.cat-icon { transition: transform .3s var(--ease); }
.cat-card:hover .cat-icon { transform: scale(1.08) rotate(-4deg); }

/* ---------- 图片懒加载渐显（默认可见，仅 pending 期间隐藏，绝不永久透明） ---------- */
img.img-fade { transition: opacity .55s var(--ease); }
img.img-fade.pending { opacity: 0; }
img.img-fade.loaded { opacity: 1; }

/* ---------- 产品/新闻详情弹窗：桌面端图左文右 ---------- */
@media (min-width: 760px) {
    .modal-card { max-width: 980px; }
    .modal-body {
        display: grid;
        grid-template-columns: minmax(300px, 41%) 1fr;
        overflow: hidden;
    }
    .modal-body .modal-hero {
        aspect-ratio: auto;
        height: 100%;
        background:
            radial-gradient(circle at 20% 20%, rgba(0, 180, 216, .12), transparent 50%),
            linear-gradient(135deg, #eef5fb, #e0edf6);
    }
    .modal-body .modal-content {
        max-height: 90vh;
        overflow-y: auto;
    }
}
.spec-table tbody tr:nth-child(even) td,
.spec-table tbody tr:nth-child(even) td:first-child { background: #fafcfe; }

/* ---------- 专业页脚（四列） ---------- */
.site-footer { padding: 64px 0 24px; }
.site-footer .footer-inner {
    grid-template-columns: 1.6fr 0.9fr 1.3fr 1.3fr;
    gap: 40px;
    align-items: start;
}
.footer-brand .footer-slogan {
    color: var(--c-glow);
    font-size: 13.5px;
    letter-spacing: 1px;
    margin-bottom: 12px;
}
.footer-brand .footer-desc {
    font-size: 13px;
    color: rgba(255, 255, 255, .55);
    line-height: 1.75;
}
.footer-col h4 {
    color: #fff;
    font-size: 14.5px;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 10px;
}
.footer-col h4::after {
    content: "";
    position: absolute;
    left: 0; bottom: 0;
    width: 22px; height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--c-accent), var(--c-primary));
}
.footer-prod-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px 14px;
}
.footer-prod-grid a,
.footer-nav a {
    font-size: 13.5px;
    color: rgba(255, 255, 255, .6);
    transition: color .2s var(--ease), transform .2s var(--ease);
}
.footer-prod-grid a { display: inline-block; }
.footer-prod-grid a:hover,
.footer-nav a:hover { color: var(--c-glow); transform: translateX(3px); }
.footer-contact { list-style: none; display: grid; gap: 12px; }
.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 9px;
    font-size: 13px;
    color: rgba(255, 255, 255, .6);
    line-height: 1.6;
}
.footer-contact svg { flex: none; margin-top: 3px; color: var(--c-accent); }
.footer-contact a { transition: color .2s var(--ease); }
.footer-contact a:hover { color: var(--c-glow); }
.footer-bottom {
    grid-column: 1 / -1;
    border-top: 1px solid rgba(255, 255, 255, .12);
    margin-top: 18px;
    padding-top: 20px;
    text-align: center;
}
.footer-bottom .footer-copy,
.footer-bottom .footer-beian { grid-column: auto; border-top: none; margin-top: 0; padding-top: 0; }

@media (max-width: 960px) {
    .site-footer .footer-inner { grid-template-columns: repeat(2, 1fr); text-align: left; }
    .footer-col h4::after { left: 0; }
    .footer-brand { grid-column: 1 / -1; }
    .footer-bottom { text-align: center; }
}
@media (max-width: 720px) {
    .site-footer .footer-inner { grid-template-columns: 1fr; gap: 28px; }
}

/* ---------- 浮动咨询按钮 ---------- */
.fab-consult {
    position: fixed;
    bottom: 84px; right: 28px;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: #fff;
    color: var(--c-primary);
    border: 1px solid var(--c-line);
    display: flex; align-items: center; justify-content: center;
    box-shadow: 0 8px 22px rgba(11, 23, 39, .18);
    z-index: 90;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s,
                background .2s var(--ease), color .2s var(--ease);
}
.fab-consult.show { opacity: 1; visibility: visible; transform: none; }
.fab-consult:hover {
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary));
    color: #fff;
    border-color: transparent;
    transform: translateY(-2px);
}

/* ============================================================
   高级感升级 第四期：专业字体 / 骨架屏 / 导航CTA / 粒子背景 / 3D卡片
   ============================================================ */

/* ---------- 导航 CTA 按钮 ---------- */
.nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 20px;
    border-radius: 999px;
    font-size: 13.5px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary));
    box-shadow: 0 4px 14px rgba(0, 119, 182, .3);
    transition: transform .2s var(--ease), box-shadow .2s var(--ease);
    white-space: nowrap;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(0, 119, 182, .42); }
@media (max-width: 720px) { .nav-cta { display: none; } }

/* ---------- Hero 粒子网络背景 ---------- */
.hero-particles {
    position: absolute;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* ---------- 骨架屏（Shimmer 加载占位） ---------- */
@keyframes skel-shimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}
.skeleton-card, .skeleton-product, .skeleton-news {
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    overflow: hidden;
}
.skeleton-card { padding: 28px 24px; }
.skeleton-product { display: flex; flex-direction: column; }
.skeleton-news { display: flex; flex-direction: column; }
.skel-img {
    aspect-ratio: 1 / 1;
    background: linear-gradient(90deg, #eef3f9 25%, #e2ecf4 50%, #eef3f9 75%);
    background-size: 200% 100%;
    animation: skel-shimmer 1.4s infinite linear;
}
.skeleton-news .skel-img { aspect-ratio: 4 / 3; }
.skel-body { padding: 20px 22px; display: flex; flex-direction: column; gap: 8px; }
.skel-icon {
    width: 48px; height: 48px;
    border-radius: 12px;
    background: linear-gradient(90deg, #eef3f9 25%, #e2ecf4 50%, #eef3f9 75%);
    background-size: 200% 100%;
    animation: skel-shimmer 1.4s infinite linear;
    margin-bottom: 18px;
}
.skel-line {
    height: 12px;
    border-radius: 6px;
    background: linear-gradient(90deg, #eef3f9 25%, #e2ecf4 50%, #eef3f9 75%);
    background-size: 200% 100%;
    animation: skel-shimmer 1.4s infinite linear;
}
.skel-line.w30 { width: 30%; }
.skel-line.w40 { width: 40%; }
.skel-line.w60 { width: 60%; }
.skel-line.w80 { width: 80%; }
.skel-line.w90 { width: 90%; }
.skeleton-card .skel-line:last-child { margin-top: 4px; }

/* ---------- 产品卡片 3D 倾斜（仅精确指针设备） ---------- */
@media (pointer: fine) {
    .product-card {
        transform-style: preserve-3d;
        transition: transform .15s ease-out, box-shadow .25s var(--ease), border-color .25s var(--ease);
    }
    .product-card.tilt-3d {
        box-shadow: 0 24px 50px rgba(3, 6, 94, .22);
    }
    .product-card .product-media,
    .product-card .product-body {
        transform-style: preserve-3d;
    }
    .product-card .product-body { transform: translateZ(20px); }
}

/* ============================================================
   高级感升级 第五期：Logo跑马灯 / 搜索建议 / 灯箱 / 流程时间线 / 细节
   ============================================================ */

/* ---------- 客户 Logo 无限跑马灯 ---------- */
.logo-marquee {
    position: relative;
    overflow: hidden;
    margin: 0 -6px;
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
    mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.logo-track {
    display: flex;
    gap: 14px;
    width: max-content;
    animation: marquee 42s linear infinite;
}
.logo-marquee:hover .logo-track { animation-play-state: paused; }
.logo-track .logo-item { flex: 0 0 auto; min-width: 152px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* ---------- 搜索实时建议 ---------- */
.search-box { position: relative; }
.search-suggest {
    position: absolute;
    top: calc(100% + 8px);
    left: 0; right: 0;
    z-index: 80;
    background: #fff;
    border: 1px solid var(--c-line);
    border-radius: var(--radius-sm);
    box-shadow: 0 18px 44px rgba(11, 23, 39, .16);
    overflow: hidden;
    animation: fadeIn .18s var(--ease);
}
.suggest-item {
    display: flex;
    align-items: baseline;
    gap: 10px;
    width: 100%;
    text-align: left;
    padding: 11px 16px;
    border-bottom: 1px solid #f1f5f9;
    transition: background .15s var(--ease);
}
.suggest-item:last-child { border-bottom: none; }
.suggest-item:hover, .suggest-item.active { background: #f2f9fd; }
.suggest-model {
    font-size: 13px;
    font-weight: 700;
    color: var(--c-primary);
    letter-spacing: .5px;
    white-space: nowrap;
}
.suggest-name { font-size: 13.5px; color: var(--c-ink); flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.suggest-cat { font-size: 11px; color: var(--c-muted); white-space: nowrap; }
.suggest-more {
    display: block;
    width: 100%;
    padding: 10px 16px;
    font-size: 12.5px;
    font-weight: 600;
    color: var(--c-primary);
    background: #f8fbfd;
    text-align: center;
    transition: background .15s var(--ease);
}
.suggest-more:hover { background: var(--c-accent-soft); }

/* ---------- 选型服务流程时间线 ---------- */
.process-steps {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 22px;
    position: relative;
}
.process-steps::before {
    content: "";
    position: absolute;
    top: 27px;
    left: 12%; right: 12%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--c-accent) 18%, var(--c-primary) 82%, transparent);
    opacity: .35;
}
.step {
    position: relative;
    background: var(--c-bg-alt);
    border: 1px solid var(--c-line);
    border-radius: var(--radius);
    padding: 56px 24px 26px;
    transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
}
.step:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.step-num {
    position: absolute;
    top: -22px; left: 24px;
    width: 54px; height: 54px;
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--c-accent), var(--c-primary));
    box-shadow: 0 8px 20px rgba(0, 119, 182, .3);
    letter-spacing: 1px;
}
.step h3 { font-size: 17px; color: var(--c-dark); margin-bottom: 8px; font-weight: 700; }
.step p { font-size: 13.5px; color: var(--c-muted); line-height: 1.65; }
@media (max-width: 960px) {
    .process-steps { grid-template-columns: repeat(2, 1fr); gap: 30px 22px; }
    .process-steps::before { display: none; }
}
@media (max-width: 720px) {
    .process-steps { grid-template-columns: 1fr; }
}

/* ---------- 图片灯箱 ---------- */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 32px;
    background: rgba(3, 6, 30, .82);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.lightbox.open { display: flex; animation: fadeIn .22s var(--ease); }
.lightbox-img {
    max-width: 92vw;
    max-height: 86vh;
    border-radius: 10px;
    box-shadow: 0 30px 80px rgba(0, 0, 0, .5);
    animation: lightbox-zoom .28s var(--ease);
    background: #fff;
}
@keyframes lightbox-zoom {
    from { opacity: 0; transform: scale(.94); }
    to { opacity: 1; transform: scale(1); }
}
.lightbox-close {
    position: absolute;
    top: 22px; right: 26px;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .12);
    color: #fff;
    font-size: 28px;
    line-height: 1;
    display: flex; align-items: center; justify-content: center;
    transition: background .2s var(--ease), transform .2s var(--ease);
}
.lightbox-close:hover { background: rgba(255, 255, 255, .25); transform: rotate(90deg); }
.lightbox-hint {
    position: absolute;
    bottom: 22px;
    left: 0; right: 0;
    text-align: center;
    font-size: 12.5px;
    color: rgba(255, 255, 255, .55);
    letter-spacing: 1px;
}
.modal-hero img { cursor: zoom-in; }

/* ---------- 排版细节 ---------- */
h1, h2, h3 { text-wrap: balance; }
.stat strong, .trust-num, .trust-num-static { font-variant-numeric: tabular-nums; }
.news-date, .product-model { font-variant-numeric: tabular-nums; }

/* 磁吸按钮复位过渡复用已有 .btn transition，仅禁用其 box-shadow 冲突即可 */
.btn.magnetic { will-change: transform; }

/* 尊重减弱动效偏好：跑马灯与灯箱动画降级 */
@media (prefers-reduced-motion: reduce) {
    .logo-marquee {
        overflow: visible;
        -webkit-mask-image: none;
        mask-image: none;
    }
    .logo-track {
        animation: none;
        display: grid;
        grid-template-columns: repeat(6, 1fr);
        width: auto;
    }
    .lightbox-img { animation: none; }
}

/* ============================================================
   高级感升级 第六期：无障碍 / SEO / 国内访问稳定性 / 移动端补全
   ============================================================ */

/* 菜单内 CTA：桌面端隐藏（导航外已有独立按钮），仅移动抽屉内显示 */
.nav-cta-mobile { display: none; }
@media (max-width: 720px) {
    .nav-cta-mobile {
        display: inline-flex;
        margin-top: 8px;
        align-self: flex-start;
    }
}

/* 键盘可达卡片的焦点样式（产品卡 / 分类卡） */
.product-card:focus-visible,
.cat-card:focus-visible {
    outline: none;
    border-color: var(--c-accent);
    box-shadow: 0 0 0 3px rgba(0, 180, 216, .28), var(--shadow-lg);
}

/* 跳过导航链接（键盘用户直达正文） */
.skip-link {
    position: absolute;
    top: -60px; left: 16px;
    z-index: 400;
    padding: 10px 20px;
    border-radius: 0 0 10px 10px;
    background: var(--c-primary);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    transition: top .2s var(--ease);
}
.skip-link:focus { top: 0; }