/* 环球链条 — 简约现代营销站 */
:root {
    --brand: #e60012;
    --brand-dark: #c40010;
    --text: #1a1a1a;
    --text-muted: #666;
    --text-light: #999;
    --bg: #ffffff;
    --bg-soft: #f7f7f8;
    --bg-dark: #0d0d0d;
    --border: #e8e8ea;
    --container: min(1280px, 94vw);
    --container-narrow: min(1120px, 94vw);
    --header-h: 64px;
    --section-y: clamp(40px, 4vw, 52px);
    /* 字号参考 snma.cn：commer.css + main.css + index.css */
    --fs-base: 14px;
    --fs-copy: 16px;
    --fs-nav: 16px;
    --fs-section: 28px;
    --fs-hero: 44px;
    --fs-hero-sub: 16px;
    --fs-card-title: 18px;
    --fs-stat: 56px;
    --fs-stat-label: 16px;
    /* 区块标题下说明段（内页 / 首页 section lead 统一） */
    --section-lead-fs: clamp(15px, 0.98vw, 16px);
    --section-lead-lh: 1.72;
    --section-lead-color: #555;
    --section-lead-ls: 0.03em;
    /* 内页区块字阶（对齐首页 / 新闻 / 联系我们） */
    --inner-section-title-fs: clamp(22px, 1.85vw, 28px);
    --inner-section-title-lh: 1.35;
    --inner-eyebrow-fs: clamp(13px, 0.9vw, 14px);
    --inner-eyebrow-ls: 0.18em;
    --inner-body-fs: var(--fs-copy, 16px);
    --inner-body-lh: 1.72;
    --inner-meta-fs: clamp(13px, 0.9vw, 14px);
    --inner-label-fs: clamp(14px, 0.92vw, 15px);
    --inner-card-title-fs: var(--fs-card-title, 18px);
    --inner-stat-num-fs: clamp(22px, 1.95vw, 28px);
    --lh-copy: 1.875;
    --lh-card: 1.72;
    --color-title: #333;
    --color-copy: #666;
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.12);
    --shadow-brand: 0 16px 40px rgba(230, 0, 18, 0.22);
    --radius: 8px;
    --radius-lg: 12px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-h);
    overflow-x: hidden;
    max-width: 100%;
}

body {
    margin: 0;
    overflow-x: hidden;
    max-width: 100%;
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: var(--fs-base);
    color: var(--color-copy);
    background: var(--bg);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

img {
    image-rendering: auto;
}


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

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

.container {
    width: var(--container);
    margin-inline: auto;
}

.section {
    padding: var(--section-y) 0;
}

.section--soft {
    background: var(--bg-soft);
}

.section-more {
    margin: 20px 0 0;
    text-align: right;
}

.section-head {
    text-align: left;
    max-width: none;
    margin: 0 0 20px;
}

.section-head .label {
    display: none;
}

.section-head h2 {
    margin: 0 0 6px;
    font-size: var(--fs-section);
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--color-title);
    padding-left: 12px;
    border-left: 3px solid var(--brand);
    line-height: 1.35;
}

.section-head h2::after {
    display: none;
}

.section-head p {
    margin: 0;
    max-width: 640px;
    font-size: var(--section-lead-fs);
    line-height: var(--section-lead-lh);
    letter-spacing: var(--section-lead-ls);
    color: var(--section-lead-color);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: var(--fs-copy);
    font-weight: 500;
    border-radius: 2px;
    border: none;
    cursor: pointer;
    transition: background 0.25s var(--ease), color 0.25s var(--ease), transform 0.2s;
}

.btn-primary {
    background: var(--brand);
    color: #fff;
}

.btn-primary:hover {
    background: var(--brand-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-brand);
}

.btn-primary {
    box-shadow: 0 8px 24px rgba(230, 0, 18, 0.25);
}

.btn-outline {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.6);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: #fff;
}

.btn-dark {
    background: var(--text);
    color: #fff;
}

.btn-dark:hover {
    background: #333;
}

.btn-pill {
    border-radius: 999px;
    padding: 12px 36px;
    min-width: 140px;
}

.link-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: var(--fs-copy);
    color: var(--brand);
    font-weight: 500;
}

.link-more:hover {
    gap: 10px;
}

/* Header */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-h);
    transition: background 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.site-header.is-scrolled,
.site-header.is-solid {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--border);
}

.site-header.is-scrolled .nav-link,
.site-header.is-solid .nav-link {
    color: var(--text);
}

.site-header.is-scrolled .logo img.logo-light,
.site-header.is-solid .logo img.logo-light {
    display: none;
}

.site-header.is-scrolled .logo img.logo-dark,
.site-header.is-solid .logo img.logo-dark {
    display: block;
}

.site-header.is-scrolled .header-phone,
.site-header.is-solid .header-phone {
    color: var(--text);
}

.site-header.is-scrolled .lang-switch a,
.site-header.is-solid .lang-switch a {
    color: var(--text-muted);
}

.site-header.is-scrolled .menu-toggle span,
.site-header.is-solid .menu-toggle span {
    background: var(--text);
}

.header-inner {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.logo img {
    height: 46px;
    width: auto;
}

.logo img.logo-dark {
    display: none;
}

.nav-main {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 10px 18px;
    font-size: var(--fs-nav);
    color: rgba(255, 255, 255, 0.92);
    position: relative;
    transition: color 0.25s;
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 4px;
    height: 2px;
    background: var(--brand);
    transform: scaleX(0);
    transition: transform 0.3s var(--ease-out);
}

.nav-link:hover::after,
.nav-item.is-open>.nav-link::after {
    transform: scaleX(1);
}

.nav-link:hover,
.nav-item.is-open>.nav-link {
    color: #fff;
}

.site-header.is-scrolled .nav-link:hover,
.site-header.is-solid .nav-link:hover {
    color: var(--brand);
}

.header-cta {
    padding: 10px 22px;
    font-size: 14px;
    border-radius: 999px;
    background: var(--brand);
    color: #fff !important;
    font-weight: 500;
    box-shadow: var(--shadow-brand);
    transition: transform 0.25s, box-shadow 0.25s;
}

.header-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 12px 28px rgba(230, 0, 18, 0.35);
}

.site-header.is-scrolled .header-cta,
.site-header.is-solid .header-cta {
    background: var(--brand);
    color: #fff !important;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 20px;
}

.header-phone {
    font-size: var(--fs-nav);
    font-weight: 600;
    color: #fff;
    white-space: nowrap;
}

.header-phone small {
    display: block;
    font-size: 11px;
    font-weight: 400;
    opacity: 0.75;
}

.header-phone--kbs {
    display: none !important;
}

.header-lang {
    display: inline-flex;
    align-items: center;
    white-space: nowrap;
}

.header-lang--seg {
    gap: 0;
    min-height: 38px;
    padding: 4px 5px 4px 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(10px);
    box-sizing: border-box;
}

.header-lang__globe {
    display: flex;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    align-self: stretch;
    padding: 0 12px 0 8px;
    margin-right: 2px;
    color: rgba(255, 255, 255, 0.9);
    border-right: 1px solid rgba(255, 255, 255, 0.22);
    pointer-events: none;
}

.header-lang__globe svg {
    display: block;
    width: 16px;
    height: 16px;
}

.header-lang__track {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 0 3px 0 6px;
}

.header-lang__btn {
    min-width: 2.85em;
    padding: 8px 18px;
    font: inherit;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.1em;
    line-height: 1;
    color: rgba(255, 255, 255, 0.72);
    background: transparent;
    border: none;
    border-radius: 999px;
    cursor: pointer;
    transition: color 0.22s ease, background 0.22s ease, box-shadow 0.22s ease;
}

.header-lang__btn:hover {
    color: #fff;
}

.header-lang--seg .header-lang__btn.is-active {
    color: var(--brand, #e60012);
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-lang__sep {
    display: none;
}


/* Mega menu */
.mega-panel {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 580px;
    background: #fff;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius);
    padding: 28px 32px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.25s var(--ease), transform 0.25s var(--ease), visibility 0.25s;
}

.nav-item.has-mega:hover .mega-panel,
.nav-item.has-mega.is-open .mega-panel {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.mega-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px 32px;
}

.mega-grid a {
    padding: 10px 0;
    font-size: 14px;
    color: var(--text);
    border-bottom: 1px solid transparent;
}

.mega-grid a:hover {
    color: var(--brand);
}

.mega-grid a span {
    display: none;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    transition: transform 0.3s, opacity 0.3s;
}

/* Hero video */
.hero {
    position: relative;
    height: 72vh;
    min-height: 420px;
    max-height: 640px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-media {
    position: absolute;
    inset: 0;
}

.hero-media video {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-media .hero-fallback {
    position: absolute;
    inset: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 50%, #1a1a1a 100%);
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(105deg, rgba(0, 0, 0, 0.82) 0%, rgba(0, 0, 0, 0.45) 45%, rgba(0, 0, 0, 0.55) 100%),
        linear-gradient(to top, rgba(0, 0, 0, 0.5) 0%, transparent 40%);
}

.hero-overlay::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 60% at 70% 40%, rgba(230, 0, 18, 0.12), transparent 55%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: #fff;
    max-width: 780px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    letter-spacing: 0.04em;
    opacity: 0.92;
    margin-bottom: 16px;
    animation: heroFade 1s var(--ease-out) both;
}

.hero-tag::before {
    content: "";
    width: 40px;
    height: 3px;
    background: var(--brand);
    flex-shrink: 0;
}

.hero h1 {
    margin: 0 0 16px;
    font-size: clamp(32px, 4.2vw, 44px);
    font-weight: 600;
    line-height: 1.15;
    letter-spacing: 0.06em;
    animation: heroFade 1s var(--ease-out) 0.1s both;
}

@keyframes heroFade {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
}

.hero-desc {
    margin: 0 0 24px;
    font-size: var(--fs-hero-sub);
    line-height: 1.65;
    opacity: 0.88;
    max-width: 520px;
    animation: heroFade 1s var(--ease-out) 0.2s both;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    animation: heroFade 1s var(--ease-out) 0.35s both;
}

.hero-scroll {
    display: none;
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    color: rgba(255, 255, 255, 0.5);
    font-size: 11px;
    letter-spacing: 0.2em;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.hero-scroll::after {
    content: "";
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.5), transparent);
    animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {

    0%,
    100% {
        transform: scaleY(0.6);
        opacity: 0.4;
    }

    50% {
        transform: scaleY(1);
        opacity: 1;
    }
}

@keyframes float {

    0%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    50% {
        transform: translateX(-50%) translateY(6px);
    }
}

/* Stats strip */
.stats-strip {
    position: relative;
    z-index: 3;
    margin-top: -32px;
    padding: 0 0 8px;
    background: transparent;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
    text-align: center;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.06);
}

.stat-item {
    padding: clamp(28px, 3vw, 36px) 16px;
    position: relative;
}

.stat-item:not(:last-child)::after {
    content: "";
    position: absolute;
    right: 0;
    top: 25%;
    height: 50%;
    width: 1px;
    background: var(--border);
}

.stat-item strong {
    display: block;
    font-size: clamp(36px, 4.5vw, 52px);
    font-weight: 600;
    font-family: Arial, "Helvetica Neue", sans-serif;
    color: var(--brand);
    line-height: 1;
}

.stat-item span {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-copy);
    margin-top: 10px;
    display: block;
}

/* Products */
.products-section {
    background: var(--bg-soft);
}

.product-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-start;
    gap: 8px;
    margin-bottom: 20px;
}

.product-tabs button {
    padding: 6px 16px;
    font-size: 13px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 999px;
    cursor: pointer;
    transition: all 0.25s var(--ease-out);
}

.product-tabs button.is-active,
.product-tabs button:hover {
    background: var(--brand);
    border-color: var(--brand);
    color: #fff;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.product-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out), border-color 0.3s;
    position: relative;
}

.product-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--brand);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s var(--ease-out);
    z-index: 2;
}

.product-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
    border-color: rgba(230, 0, 18, 0.12);
}

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

.product-card-thumb img {
    transition: transform 0.6s var(--ease-out);
}

.product-card:hover .product-card-thumb img {
    transform: scale(1.06);
}

.product-card-body h3 {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.product-card-thumb {
    aspect-ratio: 4/3;
    background: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 12px;
}

.product-card-thumb--cover img {
    object-fit: cover;
    padding: 0;
}

.product-card-body {
    padding: 14px 16px 16px;
}

.product-card-body h3 {
    margin: 0 0 10px;
    font-size: var(--fs-card-title);
    font-weight: 600;
    color: var(--color-title);
}

.product-card-body p {
    margin: 0;
    font-size: 14px;
    color: var(--color-copy);
    line-height: 1.55;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Tech features */
.tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

.tech-card {
    padding: 20px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    transition: transform 0.35s var(--ease-out), box-shadow 0.35s, border-color 0.25s;
}

.tech-card:hover {
    border-color: transparent;
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.tech-card .num {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.15em;
    color: var(--brand);
    line-height: 1;
    margin-bottom: 20px;
}

.tech-card h3 {
    margin: 0 0 12px;
    font-size: var(--fs-card-title);
    font-weight: 600;
    color: var(--color-title);
}

.tech-card p {
    margin: 0;
    font-size: var(--fs-copy);
    color: var(--color-copy);
    line-height: var(--lh-card);
}

/* CTA band */
.cta-band {
    position: relative;
    background: var(--brand);
    color: #fff;
    padding: 36px 0;
    text-align: center;
}

.cta-band .container {
    position: relative;
    z-index: 1;
}

.cta-band h2 {
    margin: 0 0 16px;
    font-size: clamp(28px, 3vw, var(--fs-section));
    font-weight: 600;
}

.cta-band p {
    margin: 0 0 32px;
    font-size: var(--fs-copy);
    line-height: var(--lh-copy);
    opacity: 0.95;
}

.cta-band .btn-outline {
    border-color: #fff;
}

/* Industries */
.industry-slider {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.industry-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-title);
    transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.industry-item:hover {
    background: var(--brand);
    color: #fff;
    border-color: var(--brand);
}

.industry-item .icon {
    display: none;
}

/* 关于我们 — 永利恺博式板式 */
.about-section {
    position: relative;
    padding: var(--section-y) 0;
    background: #fff;
    overflow: hidden;
}

.about-section__bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: linear-gradient(180deg, var(--bg-soft) 0%, #fff 100%);
}

.about-section__bg::before {
    display: none;
}

.about-section__inner {
    position: relative;
    z-index: 1;
}

.about-section__main {
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
}

.about-section__en {
    display: none;
}

.about-section__title {
    margin: 0 0 16px;
    font-size: var(--fs-section);
    padding-left: 12px;
    border-left: 3px solid var(--brand);
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--color-title);
}

.about-section__title::after {
    display: none;
}

.about-section__text p {
    margin: 0 0 12px;
    font-size: var(--fs-copy);
    line-height: var(--lh-copy);
    color: var(--color-copy);
    text-align: justify;
}

.about-section__text p:last-child {
    margin-bottom: clamp(28px, 4vw, 40px);
}

.about-section__media {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 4 / 3.2;
    background: linear-gradient(160deg, #ececec, #d8d8d8);
    position: relative;
}

.about-section__media::before {
    content: "";
    position: absolute;
    inset: 0;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: inherit;
    pointer-events: none;
    z-index: 1;
}

.about-section__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-section__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-top: clamp(56px, 7vw, 88px);
    padding-top: clamp(40px, 5vw, 56px);
    border-top: 1px solid var(--border);
}

.about-stat {
    text-align: center;
}

.about-stat__value {
    margin: 0;
    font-size: clamp(42px, 5vw, var(--fs-stat));
    font-weight: 600;
    font-family: Arial, "Helvetica Neue", sans-serif;
    line-height: 1;
    color: var(--brand);
    letter-spacing: -0.02em;
}

.about-stat__value .unit {
    font-size: 0.55em;
    font-weight: 600;
    margin-left: 0.05em;
}

.about-stat__value em {
    font-style: normal;
    font-size: 0.85em;
}

.about-stat__label {
    margin: 8px 0 0;
    font-size: var(--fs-stat-label);
    font-weight: 600;
    color: var(--color-title);
    letter-spacing: 0.02em;
}

/* 内页复用旧类名 */
.about-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.about-split .about-visual {
    aspect-ratio: 4/3;
    background: linear-gradient(160deg, #f0f0f0, #e0e0e0);
    border-radius: 4px;
}

/* News */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.news-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: #fff;
    transition: transform 0.35s var(--ease-out), box-shadow 0.35s;
}

.news-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.news-card:hover .news-card-thumb img {
    transform: scale(1.05);
}

.news-card-thumb img {
    transition: transform 0.6s var(--ease-out);
}

.news-card-thumb {
    aspect-ratio: 16/10;
    background: var(--bg-soft);
}

.news-card-body {
    padding: clamp(26px, 2.5vw, 32px);
}

.news-card time {
    font-size: 12px;
    color: var(--text-light);
}

.news-card h3 {
    margin: 10px 0 14px;
    font-size: var(--fs-card-title);
    font-weight: 600;
    color: var(--color-title);
    line-height: 1.5;
}

.news-card p {
    margin: 0;
    font-size: var(--fs-copy);
    color: var(--color-copy);
    line-height: var(--lh-card);
}

/* Partners */
.partners-row {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 32px 48px;
    opacity: 0.6;
    font-size: 14px;
    font-weight: 500;
}

.partners-logos {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px 28px;
    align-items: center;
}

.partners-panel {
    padding: 8px 0 0;
}

.partners-logos img {
    display: block;
    max-height: 52px;
    max-width: 100%;
    width: auto;
    margin-inline: auto;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.55;
    transition: filter 0.35s, opacity 0.35s, transform 0.35s var(--ease-out);
}

.partners-logos img:hover {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.05);
}

.news-card-thumb {
    aspect-ratio: 16/10;
    background: var(--bg-soft);
    overflow: hidden;
}

.news-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.business-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.business-card {
    padding: 28px 22px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
    transition: transform 0.35s var(--ease-out), box-shadow 0.35s, border-color 0.3s;
    border-top: 3px solid transparent;
}

.business-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-top-color: var(--brand);
}

.business-card h3 {
    margin: 0 0 10px;
    font-size: var(--fs-card-title);
    color: var(--color-title);
}

.business-card p {
    margin: 0;
    font-size: var(--fs-base);
    line-height: var(--lh-card);
    color: var(--color-copy);
}

.strength-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 48px;
}

.strength-gallery img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
    border-radius: var(--radius);
    transition: transform 0.5s var(--ease-out), box-shadow 0.35s;
    box-shadow: var(--shadow);
}

.strength-gallery img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

.reveal-delay-1 {
    transition-delay: 0.08s;
}

.reveal-delay-2 {
    transition-delay: 0.16s;
}

.reveal-delay-3 {
    transition-delay: 0.24s;
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* Footer */
.site-footer {
    /* 字号对齐 snma.cn：正文 14px、h6 16px、h4 20px、h5 18px */
    --footer-text: 14px;
    --footer-text-md: 16px;
    --footer-title: 20px;
    --footer-brand-title: 18px;
    --footer-link-lh: 1.58;
    --footer-link-gap: 2px;
    --footer-desc-lh: 1.875;
    --footer-pad-top: clamp(22px, 2.8vw, 28px);
    --footer-pad-main: clamp(48px, 5vw, 65px);
    --footer-pad-main-bottom: 50px;
    --footer-pad-bottom: 20px;
    --footer-gap-brand: clamp(40px, 4.2vw, 56px);
    --footer-gap-x: clamp(32px, 3.6vw, 48px);
    --footer-gap-y: clamp(28px, 3vw, 36px);
    --footer-fg: #666;
    --footer-fg-muted: #888;
    --footer-heading: #333;
    --footer-link: #555;
    --footer-border: rgba(15, 18, 28, 0.08);
    background: linear-gradient(180deg, #f8f9fb 0%, #eef1f5 52%, #e8ebf0 100%);
    color: var(--footer-fg);
    font-size: var(--footer-text-md);
    line-height: var(--footer-link-lh);
    padding-top: 0;
    border-top: 1px solid var(--footer-border);
}

.footer-top {
    padding: var(--footer-pad-top) 0;
    border-bottom: 1px solid var(--footer-border);
    background: rgba(255, 255, 255, 0.45);
}

.footer-top__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 20px 40px;
}

.footer-hotline {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    min-width: 0;
}

.footer-hotline__main {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 12px 20px;
}

.footer-hotline__label {
    font-size: var(--footer-text);
    color: var(--footer-fg-muted);
    letter-spacing: 0.06em;
}

.footer-hotline__num {
    font-size: clamp(28px, 3.2vw, 36px);
    font-weight: 600;
    color: var(--footer-heading);
    letter-spacing: 0.04em;
    line-height: 1.1;
    transition: color 0.2s;
}

.footer-hotline__num:hover {
    color: var(--brand);
}

.footer-hotline__hours {
    margin: 0;
    font-size: var(--footer-text);
    color: var(--footer-fg-muted);
    line-height: 1.65;
    letter-spacing: 0.02em;
}

.footer-top__btn {
    flex-shrink: 0;
    padding: 13px 34px;
    font-size: var(--footer-text-md);
    letter-spacing: 0.08em;
    border-radius: 2px;
}

.footer-main {
    padding: var(--footer-pad-main) 0 var(--footer-pad-main-bottom);
    border-bottom: 1px solid var(--footer-border);
}

.footer-main__layout {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
}

.footer-brand {
    flex: 0 0 auto;
    width: min(100%, 400px);
    max-width: 400px;
}

.footer-nav {
    flex: 1 1 0;
    min-width: 0;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: var(--footer-gap-x);
    row-gap: var(--footer-gap-y);
    align-items: start;
}

.footer-col {
    align-self: start;
    height: auto;
}

.footer-brand__logo {
    display: inline-block;
    margin-bottom: clamp(18px, 2vw, 22px);
    transition: opacity 0.2s;
}

.footer-brand__logo:hover {
    opacity: 0.88;
}

.footer-brand__logo img {
    display: block;
    width: auto;
    height: clamp(64px, 6.8vw, 84px);
    max-width: min(100%, 300px);
}

.footer-brand__name {
    margin: 0 0 14px;
    font-size: var(--footer-brand-title);
    font-weight: 600;
    line-height: 1.5;
    color: var(--footer-heading);
    letter-spacing: 0.02em;
}

.footer-brand__desc {
    font-size: var(--footer-text-md);
    line-height: var(--footer-desc-lh);
    color: var(--footer-fg);
    max-width: none;
}

.footer-brand__heritage {
    display: inline-flex;
    align-items: stretch;
    margin: clamp(20px, 2.4vw, 26px) 0 0;
    padding: clamp(12px, 1.4vw, 16px) clamp(18px, 2vw, 24px) clamp(12px, 1.4vw, 16px) clamp(16px, 1.8vw, 20px);
    background: rgba(255, 255, 255, 0.72);
    border: 1px solid var(--footer-border);
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(15, 18, 28, 0.04);
}

.footer-brand__heritage-mark {
    flex-shrink: 0;
    width: 3px;
    margin-right: clamp(14px, 1.6vw, 18px);
    background: var(--brand);
    border-radius: 2px;
}

.footer-brand__heritage-text {
    display: flex;
    align-items: baseline;
    gap: clamp(10px, 1.2vw, 12px);
}

.footer-brand__heritage-en {
    font-size: clamp(11px, 0.78vw, 12px);
    font-weight: 600;
    line-height: 1;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--footer-fg-muted);
}

.footer-brand__heritage-year {
    font-size: clamp(28px, 2.6vw, 36px);
    font-weight: 700;
    line-height: 1;
    letter-spacing: 0.04em;
    color: var(--footer-heading);
    font-variant-numeric: tabular-nums;
}

.footer-col h4 {
    color: var(--footer-heading);
    font-size: var(--footer-title);
    margin: 0 0 14px;
    padding: 0;
    font-weight: 600;
    line-height: 1.45;
    letter-spacing: 0.02em;
    border: none;
}

.footer-col>a {
    display: block;
    font-size: var(--footer-text-md);
    line-height: var(--footer-link-lh);
    padding: 5px 0;
    color: var(--footer-link);
    transition: color 0.2s, transform 0.2s var(--ease-out);
}

.footer-col>a:hover {
    color: var(--brand);
    transform: translateX(3px);
}

.footer-col>a.footer-col__more {
    display: block;
    width: max-content;
    margin-top: 2px;
    padding: 5px 0;
    color: var(--footer-fg-muted);
}

.footer-col__more-dots {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.footer-col__more-dots i {
    display: block;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: currentColor;
    transition: background 0.2s, transform 0.2s var(--ease-out);
}

.footer-col>a.footer-col__more:hover {
    color: var(--brand);
    transform: translateX(3px);
}

.footer-col>a.footer-col__more:hover .footer-col__more-dots i:nth-child(2) {
    transform: translateY(-1px);
}

.footer-contact {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-contact li {
    margin-bottom: 10px;
}

.footer-contact li:last-child {
    margin-bottom: 0;
}

.footer-contact__label {
    display: block;
    font-size: var(--footer-text);
    font-weight: 500;
    color: var(--footer-fg-muted);
    margin-bottom: 4px;
    letter-spacing: 0.02em;
}

.footer-contact a {
    display: inline-block;
    padding: 0;
    font-size: var(--footer-text-md);
    line-height: var(--footer-link-lh);
    color: var(--footer-heading);
    font-weight: 600;
    transition: color 0.2s;
    overflow-wrap: anywhere;
}

.footer-contact a:hover {
    color: var(--brand);
}

.footer-contact__text {
    display: block;
    font-size: var(--footer-text-md);
    line-height: var(--footer-link-lh);
    color: var(--footer-link);
    max-width: 18em;
}

.footer-col--contact {
    min-width: 0;
}

@media (min-width: 1025px) {
    .footer-brand {
        width: min(100%, 400px);
        max-width: 400px;
        padding-right: 0;
    }

    .footer-main__layout {
        justify-content: flex-start;
    }

    .footer-nav {
        flex: 1 1 0;
        width: auto;
        max-width: none;
        margin-left: 8%;
        --footer-gap-x: clamp(48px, 5.8vw, 80px);
        grid-template-columns:
            minmax(0, 0.92fr) minmax(0, 1.08fr) minmax(0, 0.92fr) minmax(272px, 1.15fr);
    }

    .footer-col--contact {
        min-width: 272px;
    }

    .footer-contact__text {
        max-width: none;
        white-space: nowrap;
    }

    .footer-contact a[href^="mailto:"] {
        white-space: nowrap;
    }
}

@media (max-width: 1440px) {
    .footer-brand {
        width: min(100%, 320px);
        max-width: 320px;
    }
}

/* 1280～1480 版心：压缩品牌区与列间距，避免导航链文字折行（如 1366 笔记本） */
@media (min-width: 1025px) and (max-width: 1366px) {
    .footer-brand {
        width: min(100%, 280px);
        max-width: 280px;
    }

    .footer-brand__logo img {
        height: clamp(56px, 5.2vw, 72px);
        max-width: min(100%, 248px);
    }

    .footer-brand__name {
        font-size: 17px;
        margin-bottom: 10px;
    }

    .footer-brand__desc {
        font-size: 15px;
        line-height: 1.72;
    }

    .footer-brand__heritage {
        margin-top: clamp(16px, 1.8vw, 20px);
        padding: 10px 16px 10px 14px;
    }


    .footer-col h4 {
        font-size: 18px;
        margin-bottom: 12px;
        white-space: nowrap;
    }

    .footer-col>a:not(.footer-col__more) {
        font-size: 15px;
        white-space: nowrap;
    }

    .footer-col--contact {
        min-width: 236px;
    }

    .footer-contact__label,
    .footer-contact a,
    .footer-contact__text {
        font-size: 15px;
    }
}
@media (max-width: 1080px) {
    .footer-nav{
        margin-left: 5%;
    }
}

.footer-bottom {
    padding: var(--footer-pad-bottom) 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px 32px;
    font-size: var(--footer-text);
    line-height: var(--footer-link-lh);
    color: var(--footer-fg);
}

.footer-bottom__copy {
    margin: 0;
    min-width: 0;
    flex: 1 1 16rem;
    padding-right: 8px;
}

.footer-bottom__end {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    margin-left: auto;
    flex: 0 1 auto;
}

.footer-bottom__legal {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 14px;
}

.footer-bottom__split {
    flex-shrink: 0;
    width: 1px;
    height: 0.85em;
    background: rgba(15, 18, 28, 0.14);
}

.footer-bottom__links {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 0 14px;
}

.footer-bottom__links a {
    font-size: var(--footer-text);
    color: var(--footer-fg-muted);
    transition: color 0.2s;
    white-space: nowrap;
}

.footer-bottom__links a+a::before {
    content: "";
    display: inline-block;
    width: 3px;
    height: 3px;
    margin-right: 14px;
    vertical-align: middle;
    border-radius: 50%;
    background: rgba(15, 18, 28, 0.22);
}

.footer-bottom__links a:hover {
    color: var(--brand);
}

.footer-beian__link {
    font-size: inherit;
    line-height: inherit;
    color: var(--footer-fg);
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: color 0.2s ease;
    white-space: nowrap;
}

.footer-beian__link:hover {
    color: var(--brand);
}

/* 手机端页脚：保留结构与横向导航，优化字号与间距 */
@media (max-width: 767px) {
    .site-footer {
        --footer-text: 12px;
        --footer-text-md: 13px;
        --footer-title: 15px;
        --footer-brand-title: 16px;
        --footer-link-lh: 1.48;
        --footer-desc-lh: 1.62;
        --footer-pad-top: 18px;
        --footer-pad-main: clamp(26px, 6.5vw, 32px);
        --footer-pad-main-bottom: clamp(24px, 6vw, 30px);
        --footer-pad-bottom: 14px;
        --footer-gap-x: 0;
        --footer-gap-y: 20px;
    }

    .footer-main__layout {
        gap: clamp(20px, 5.2vw, 28px);
    }

    .footer-brand__logo {
        margin-bottom: 12px;
    }

    .footer-brand__logo img {
        height: clamp(48px, 12vw, 54px);
        max-width: min(100%, 216px);
    }

    .footer-brand__name {
        margin-bottom: 8px;
        line-height: 1.42;
        letter-spacing: 0.01em;
    }

    .footer-brand__desc {
        line-height: var(--footer-desc-lh);
    }

    .footer-brand__heritage {
        margin-top: 14px;
        padding: 8px 14px 8px 11px;
    }

    .footer-brand__heritage-mark {
        margin-right: 12px;
    }

    .footer-brand__heritage-en {
        font-size: 10px;
        letter-spacing: 0.28em;
    }

    .footer-brand__heritage-year {
        font-size: clamp(22px, 5.8vw, 26px);
    }

    .footer-nav {
        gap: clamp(16px, 4.2vw, 22px);
        padding-bottom: 4px;
    }

    .footer-col {
        min-width: clamp(104px, 27vw, 148px);
        max-width: min(72vw, 260px);
    }

    .footer-col h4 {
        margin-bottom: 8px;
        line-height: 1.35;
        letter-spacing: 0.015em;
    }

    .footer-col > a {
        padding: 2px 0;
    }

    .footer-col > a.footer-col__more {
        margin-top: 0;
        padding: 2px 0 0;
    }

    .footer-col--contact {
        min-width: clamp(132px, 34vw, 196px);
        max-width: min(82vw, 280px);
    }

    .footer-contact li {
        margin-bottom: 8px;
    }

    .footer-contact__label {
        margin-bottom: 2px;
        font-size: 11px;
        line-height: 1.35;
    }

    .footer-contact a {
        font-size: var(--footer-text-md);
        line-height: var(--footer-link-lh);
        font-weight: 600;
    }

    .footer-contact__text {
        max-width: none;
        font-size: var(--footer-text-md);
        line-height: var(--footer-link-lh);
    }

    .footer-contact a[href^="mailto:"] {
        white-space: normal;
        word-break: break-all;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
        font-size: var(--footer-text);
        line-height: 1.52;
    }

    .footer-bottom__copy {
        flex: none;
        padding-right: 0;
        font-size: 12px;
        line-height: 1.52;
        letter-spacing: 0.01em;
    }

    .footer-bottom__end {
        margin-left: 0;
        width: 100%;
        max-width: 100%;
        min-width: 0;
        flex-wrap: nowrap;
        justify-content: flex-start;
        gap: 10px 12px;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .footer-bottom__end::-webkit-scrollbar {
        display: none;
    }

    .footer-beian__link {
        flex: 0 0 auto;
        min-width: 0;
        font-size: 12px;
        white-space: nowrap;
    }

    .footer-bottom__legal {
        flex: 0 0 auto;
        margin-left: auto;
        gap: 10px;
    }

    .footer-bottom__links {
        gap: 0 8px;
    }

    .footer-bottom__links a {
        font-size: 12px;
    }

    .footer-bottom__links a + a::before {
        margin-right: 8px;
    }
}

@media (max-width: 640px) {
    .footer-top__inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-top__btn {
        width: 100%;
        text-align: center;
    }

    /* 页脚整体居中；收紧主区与底栏留白 */
    .site-footer {
        --footer-pad-main: clamp(18px, 4.5vw, 24px);
        --footer-pad-main-bottom: 14px;
        --footer-pad-bottom: 10px;
    }

    .site-footer .footer-main__layout {
        align-items: center;
        gap: 10px;
    }

    .site-footer .footer-brand {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .site-footer .footer-brand__desc {
        max-width: 22em;
    }

    .site-footer .footer-brand__heritage {
        margin-top: 10px;
    }

    .site-footer .footer-nav {
        flex-wrap: wrap;
        justify-content: center;
        overflow-x: visible;
        gap: 10px 12px;
        padding-bottom: 0;
        margin-top: 2px;
    }

    .site-footer .footer-col {
        min-width: clamp(96px, 40vw, 140px);
        max-width: min(88vw, 260px);
        text-align: center;
    }

    .site-footer .footer-col h4 {
        text-align: center;
    }

    .site-footer .footer-col--contact {
        min-width: min(100%, 280px);
        max-width: min(100%, 320px);
    }

    .site-footer .footer-contact li {
        text-align: center;
    }

    .site-footer .footer-contact__label,
    .site-footer .footer-contact__text {
        display: block;
    }

    .site-footer .footer-bottom {
        align-items: center;
        text-align: center;
        gap: 8px;
    }

    .site-footer .footer-bottom__copy {
        text-align: center;
    }

    .site-footer .footer-bottom__end {
        justify-content: center;
        flex-wrap: wrap;
        overflow-x: visible;
        gap: 4px 8px;
    }

    .site-footer .footer-bottom__legal {
        margin-left: 0;
        gap: 6px;
    }

    .site-footer .footer-bottom__links {
        gap: 0 6px;
    }

    .site-footer .footer-bottom__links a + a::before {
        margin-right: 6px;
    }
}

/* Inner page hero */
.page-hero {
    padding-top: calc(var(--header-h) + 48px);
    padding-bottom: 48px;
    background: var(--bg-soft);
}

.page-hero h1 {
    margin: 0;
    font-size: clamp(32px, 4vw, 44px);
}

.breadcrumb {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.breadcrumb a:hover {
    color: var(--brand);
}

/* Mobile nav drawer */
.mobile-nav {
    position: fixed;
    inset: 0;
    z-index: 1200;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.mobile-nav.is-open {
    opacity: 1;
    visibility: visible;
}

.mobile-nav-panel {
    position: absolute;
    top: 0;
    right: 0;
    width: min(320px, 85vw);
    height: 100%;
    background: #fff;
    padding: 24px;
    transform: translateX(100%);
    transition: transform 0.35s var(--ease);
    overflow-y: auto;
}

.mobile-nav.is-open .mobile-nav-panel {
    transform: translateX(0);
}

.mobile-nav-panel a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    font-size: 15px;
    color: var(--text);
    transition: color 0.2s;
}

.mobile-nav-panel a.is-active {
    color: var(--brand);
    font-weight: 600;
}

.mobile-nav-close {
    position: absolute;
    top: 16px;
    right: 16px;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

@media (max-width: 1024px) {
    .nav-main {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .product-grid,
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .industry-slider {
        grid-template-columns: repeat(3, 1fr);
    }

    .about-split {
        grid-template-columns: 1fr;
    }

    .about-section__main {
        grid-template-columns: 1fr;
    }

    .about-section__media {
        order: -1;
        max-width: none;
        margin: 0;
        width: 100%;
    }

    .about-section__stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px 16px;
    }

    .footer-main__layout {
        flex-direction: column;
    }

    .footer-brand {
        width: 100%;
        max-width: none;
    }

    .footer-nav {
        display: flex;
        flex-wrap: nowrap;
        align-items: flex-start;
        gap: clamp(22px, 4.5vw, 36px);
        width: 100%;
        max-width: 100%;
        min-width: 0;
        margin-left: 0;
        padding-bottom: 2px;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

    .footer-nav::-webkit-scrollbar {
        display: none;
    }

    .footer-col {
        flex: 0 0 auto;
        width: max-content;
        min-width: clamp(120px, 28vw, 168px);
        max-width: min(78vw, 280px);
    }

    .footer-col>a:not(.footer-col__more) {
        white-space: nowrap;
    }

    .footer-col--contact {
        grid-column: auto;
        min-width: clamp(148px, 36vw, 220px);
        max-width: min(85vw, 300px);
    }

    .footer-col--contact .footer-contact__text,
    .footer-col--contact a[href^="mailto:"] {
        white-space: normal;
    }
}

@media (max-width: 1200px) {
    :root {
        --fs-stat: 48px;
        --fs-hero: 40px;
    }
}

@media (max-width: 1043px) {
    :root {
        --fs-stat: 42px;
        --fs-hero: 36px;
    }

    .hero-desc {
        margin-bottom: 45px;
    }
}

@media (max-width: 768px) {
    :root {
        --fs-stat: 28px;
        --fs-section: 22px;
        --fs-hero: 24px;
        --fs-stat-label: 16px;
    }

    .hero-desc {
        margin-bottom: 20px;
    }

    .section-head h2::after {
        width: 30px;
        margin-left: 12px;
    }
}

#technology.section {
    background: #fff;
}

/* 全站右侧快捷栏（第一版：独立圆钮 + 电话悬停展开） */
.site-float {
    position: fixed;
    right: clamp(10px, 1.2vw, 18px);
    bottom: clamp(64px, 9vh, 96px);
    z-index: 900;
}

.site-float__nav {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
}

.site-float__item {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    padding: 0;
    color: #fff;
    background: var(--brand, #e60012);
    border: none;
    border-radius: 50%;
    box-shadow: 0 4px 14px rgba(230, 0, 18, 0.28);
    cursor: pointer;
    text-decoration: none;
    transition:
        background 0.2s ease,
        transform 0.2s ease,
        box-shadow 0.2s ease;
}

.site-float__item:hover,
.site-float__item:focus-visible {
    color: #fff;
    background: var(--brand-dark, #c40010);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(230, 0, 18, 0.32);
}

/* 联系页等后加载 layui.css 时 a:hover{color:#777} 会盖掉侧栏颜色，需提高优先级 */
.site-float a.site-float__item,
.site-float a.site-float__item:hover,
.site-float a.site-float__item:focus-visible,
.site-float button.site-float__item,
.site-float button.site-float__item:hover,
.site-float button.site-float__item:focus-visible {
    color: #fff;
}

.site-float__item:focus-visible {
    outline: 2px solid rgba(230, 0, 18, 0.45);
    outline-offset: 2px;
}

.site-float__item--top {
    background: #4a4a4a;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.18);
}

.site-float__item--top:hover,
.site-float__item--top:focus-visible {
    background: #333;
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.22);
}

.site-float__item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* 胶囊向左展开（与电话一致，替代左侧白底气泡） */
.site-float__item--slide {
    justify-content: flex-start;
    width: 46px;
    min-height: 46px;
    height: auto;
    padding: 0;
    overflow: hidden;
    border-radius: 23px;
    transition:
        width 0.28s ease,
        background 0.2s ease,
        box-shadow 0.2s ease,
        transform 0.2s ease;
}

.site-float__item--slide:hover,
.site-float__item--slide:focus-visible {
    transform: translateY(-2px);
}

.site-float__item--slide .site-float__item-icon {
    width: 46px;
    height: 46px;
    flex-shrink: 0;
}

.site-float__slide-text {
    display: flex;
    align-items: center;
    max-width: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
    white-space: nowrap;
    opacity: 0;
    transition:
        max-width 0.28s ease,
        opacity 0.22s ease;
}

.site-float__slide-text>span {
    display: block;
    padding-right: 14px;
    line-height: 1.25;
}

.site-float__slide-text--message {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.site-float__slide-text--email {
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.site-float a.site-float__item--message:hover,
.site-float a.site-float__item--message:focus-visible {
    width: 212px;
    color: #1f2937;
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.14);
}

.site-float__item--message:hover .site-float__item-icon,
.site-float__item--message:focus-visible .site-float__item-icon {
    color: var(--brand, #e60012);
}

.site-float__item--message:hover .site-float__slide-text,
.site-float__item--message:focus-visible .site-float__slide-text {
    max-width: 162px;
    opacity: 1;
}

.site-float__item--message .site-float__slide-text>span {
    overflow: hidden;
    text-overflow: ellipsis;
}

.site-float a.site-float__item--email:hover,
.site-float a.site-float__item--email:focus-visible {
    width: 244px;
    color: #1f2937;
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.08);
    box-shadow: 0 8px 22px rgba(15, 23, 42, 0.14);
}

.site-float__item--email:hover .site-float__item-icon,
.site-float__item--email:focus-visible .site-float__item-icon {
    color: var(--brand, #e60012);
}

.site-float__item--email:hover .site-float__slide-text,
.site-float__item--email:focus-visible .site-float__slide-text {
    max-width: 192px;
    opacity: 1;
}

.site-float__phone-pulse {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 46px;
    height: 46px;
    margin: -23px 0 0 -23px;
    border-radius: 50%;
    pointer-events: none;
}

.site-float__phone-pulse::before,
.site-float__phone-pulse::after {
    content: "";
    position: absolute;
    inset: 0;
    border: 2px solid rgba(230, 0, 18, 0.45);
    border-radius: 50%;
    animation: site-float-phone-ring 2.4s ease-out infinite;
}

.site-float__phone-pulse::after {
    animation-delay: 1.2s;
}

@keyframes site-float-phone-ring {
    0% {
        transform: scale(1);
        opacity: 0.55;
    }

    100% {
        transform: scale(1.75);
        opacity: 0;
    }
}

.site-float__item--phone .site-float__item-icon {
    position: relative;
    z-index: 1;
    width: 46px;
    height: 46px;
}

.site-float__item--phone .site-float__item-icon svg {
    transform-origin: 50% 85%;
    animation: site-float-phone-shake 3.2s ease-in-out infinite;
}

@keyframes site-float-phone-shake {

    0%,
    52%,
    100% {
        transform: rotate(0);
    }

    54% {
        transform: rotate(-14deg);
    }

    56% {
        transform: rotate(14deg);
    }

    58% {
        transform: rotate(-12deg);
    }

    60% {
        transform: rotate(12deg);
    }

    62% {
        transform: rotate(-6deg);
    }

    64% {
        transform: rotate(0);
    }
}

.site-float__phone-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 2px;
    max-width: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
    white-space: nowrap;
    opacity: 0;
    transition:
        max-width 0.28s ease,
        opacity 0.22s ease,
        padding 0.28s ease;
}

.site-float__phone-label {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.2;
    color: #fff;
    letter-spacing: 0.06em;
    opacity: 0.92;
}

.site-float__phone-num {
    font-size: 17px;
    font-weight: 700;
    line-height: 1.2;
    color: #fff;
    letter-spacing: 0.02em;
    font-variant-numeric: tabular-nums;
}

.site-float a.site-float__item--phone,
.site-float a.site-float__item--phone:hover,
.site-float a.site-float__item--phone:focus-visible {
    color: #fff;
}

.site-float a.site-float__item--phone:hover,
.site-float a.site-float__item--phone:focus-visible {
    width: 200px;
    padding-right: 14px;
}

.site-float a.site-float__item--phone:hover .site-float__item-icon,
.site-float a.site-float__item--phone:focus-visible .site-float__item-icon {
    color: #fff;
}

.site-float__item--phone:hover .site-float__phone-text,
.site-float__item--phone:focus-visible .site-float__phone-text {
    max-width: 150px;
    padding-right: 4px;
    opacity: 1;
}

@media (max-width: 768px) {
    .site-float {
        bottom: clamp(56px, 8vh, 72px);
    }

    .site-float__item--phone {
        width: 178px;
        padding-right: 12px;
    }

    .site-float__item--phone .site-float__phone-text {
        max-width: 128px;
        opacity: 1;
    }

    .site-float__phone-label {
        font-size: 12px;
    }

    .site-float__phone-num {
        font-size: 16px;
    }

}

@media (max-width: 640px) {
    .site-float__nav > :not(.site-float__item--top) {
        display: none;
    }

    .site-float {
        right: 12px;
        bottom: max(16px, env(safe-area-inset-bottom, 0px));
    }
}

@media (prefers-reduced-motion: reduce) {

    .site-float__phone-pulse::before,
    .site-float__phone-pulse::after,
    .site-float__item--phone .site-float__item-icon svg {
        animation: none;
    }

    .site-float__item--slide,
    .site-float__phone-text,
    .site-float__slide-text {
        transition: none;
    }
}