@charset "utf-8";
/* =========================================================================
   华煤科技 · 首页样式（对应 /Hmkj.aspx）
   说明：本文件原先存放的是旧版首页（#div1~#div5）的样式，与现在的页面
         结构（nav / hero / product / about / features / footer）完全不
         对应，浏览器一条规则也匹配不上，所以页面"没有样式"。
         现按 Hmkj.aspx 的实际结构重写。
   配色：深空蓝底 + 青色(00d4ff)点缀，与 hero 中的 SVG 描边保持一致。
   ========================================================================= */

/* ---------------------------- 基础重置 ---------------------------- */
*,
*::before,
*::after {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 96px;
    -webkit-text-size-adjust: 100%;
}

/* ========== 全局滚动条（Chrome / Edge / Safari） ========== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}
::-webkit-scrollbar-track {
    background: #0a0e17;
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #00d4ff, #0099cc);
    border-radius: 6px;
    border: 2px solid #0a0e17;
}
::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #00e6ff, #00aadd);
}
::-webkit-scrollbar-button {
    display: none;
}
::-webkit-scrollbar-corner {
    background: #0a0e17;
}
/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: #0099cc #0a0e17;
}

body {
    margin: 0;
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    color: #1f2d3d;
    background: #fff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, p, figure {
    margin: 0;
}

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

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

img {
    max-width: 100%;
    border: 0;
    vertical-align: middle;
}

::selection {
    background: rgba(0, 212, 255, .28);
    color: #04121f;
}

/* ---------------------------- 顶部导航 ---------------------------- */
.nav-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 80px;
    background: rgba(20, 45, 75, .72);
    border-bottom: 1px solid rgba(0, 212, 255, .18);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    -webkit-transition: background .3s ease, box-shadow .3s ease;
    transition: background .3s ease, box-shadow .3s ease;
}

    .nav-container.scrolled {
        background: rgba(15, 35, 60, .9);
        box-shadow: 0 10px 30px rgba(0, 0, 0, .3);
    }

.nav-content {
    max-width: 1280px;
    height: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
    gap: 24px;
}

.nav-logo {
    position: relative;
    padding-left: 26px;
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff;
    white-space: nowrap;
}

    .nav-logo::before {
        content: "";
        position: absolute;
        left: 0;
        top: 50%;
        width: 12px;
        height: 12px;
        margin-top: -6px;
        border-radius: 3px;
        background: linear-gradient(135deg, #00d4ff, #39f0c8);
        box-shadow: 0 0 14px rgba(0, 212, 255, .85);
        -webkit-transform: rotate(45deg);
        -ms-transform: rotate(45deg);
        transform: rotate(45deg);
    }

.nav-menu {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    gap: 4px;
}

    .nav-menu li {
        -ms-flex-negative: 0;
        flex-shrink: 0;
    }

    .nav-menu a {
        position: relative;
        display: block;
        padding: 10px 16px;
        border-radius: 6px;
        font-size: 15px;
        color: rgba(228, 240, 255, .78);
        white-space: nowrap;
        -webkit-transition: color .25s ease, background .25s ease;
        transition: color .25s ease, background .25s ease;
    }

        .nav-menu a::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 4px;
            height: 2px;
            border-radius: 1px;
            background: linear-gradient(90deg, #00d4ff, #39f0c8);
            -webkit-transform: scaleX(0);
            -ms-transform: scaleX(0);
            transform: scaleX(0);
            -webkit-transition: transform .25s ease;
            transition: transform .25s ease;
        }

        .nav-menu a:hover,
        .nav-menu a:focus {
            color: #00d4ff;
            background: rgba(0, 212, 255, .08);
        }

            .nav-menu a:hover::after,
            .nav-menu a:focus::after {
                -webkit-transform: scaleX(1);
                -ms-transform: scaleX(1);
                transform: scaleX(1);
            }

/* ---------------------------- 首屏 ---------------------------- */
.hero-section {
    position: relative;
    min-height: 100vh;
    padding: 120px 24px 80px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    overflow: hidden;
    text-align: center;
    background: radial-gradient(1200px 600px at 50% 0%, #14416d 0%, #0a1c31 48%, #050e19 100%);
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("../img/beijingtu.png");
    background-size: cover;
    background-position: center;
    opacity: .55;
    pointer-events: none;
}

    .hero-bg::after {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background-image: linear-gradient(rgba(0, 212, 255, .07) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 212, 255, .07) 1px, transparent 1px);
        background-size: 68px 68px;
        -webkit-mask-image: radial-gradient(circle at 50% 42%, #000 0%, rgba(0, 0, 0, .55) 45%, transparent 78%);
        mask-image: radial-gradient(circle at 50% 42%, #000 0%, rgba(0, 0, 0, .55) 45%, transparent 78%);
    }

#particles-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1000px;
}

.hero-title {
    font-size: clamp(30px, 4.8vw, 60px);
    line-height: 1.28;
    font-weight: 700;
    letter-spacing: 3px;
    color: #fff;
    text-shadow: 0 6px 34px rgba(0, 132, 220, .55);
    -webkit-animation: fxFadeUp .9s .1s both;
    animation: fxFadeUp .9s .1s both;
}

.hero-subtitle {
    margin-top: 24px;
    font-size: clamp(14px, 1.6vw, 21px);
    letter-spacing: 4px;
    color: rgba(214, 233, 252, .82);
    -webkit-animation: fxFadeUp .9s .32s both;
    animation: fxFadeUp .9s .32s both;
}

.hero-btn {
    display: inline-block;
    margin-top: 46px;
    padding: 14px 46px;
    border-radius: 999px;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 2px;
    color: #04121f;
    background: linear-gradient(135deg, #00d4ff, #39f0c8);
    box-shadow: 0 12px 32px rgba(0, 212, 255, .35);
    -webkit-animation: fxFadeUp .9s .5s both;
    animation: fxFadeUp .9s .5s both;
    -webkit-transition: transform .25s ease, box-shadow .25s ease;
    transition: transform .25s ease, box-shadow .25s ease;
}

    .hero-btn:hover,
    .hero-btn:focus {
        -webkit-transform: translateY(-3px);
        -ms-transform: translateY(-3px);
        transform: translateY(-3px);
        box-shadow: 0 18px 46px rgba(0, 212, 255, .55);
        color: #04121f;
    }

.hero-scroll {
    position: absolute;
    left: 50%;
    bottom: 30px;
    z-index: 2;
    margin-left: -15px;
    opacity: .8;
    -webkit-animation: fxBounce 2.2s infinite;
    animation: fxBounce 2.2s infinite;
}

/* ---------------------------- 通用区块 ---------------------------- */
.section {
    position: relative;
    padding: 108px 24px;
}

.section-title {
    position: relative;
    padding-bottom: 20px;
    font-size: clamp(24px, 2.8vw, 36px);
    font-weight: 700;
    letter-spacing: 2px;
    text-align: center;
    color: #0d2138;
}

    .section-title::after {
        content: "";
        position: absolute;
        left: 50%;
        bottom: 0;
        width: 62px;
        height: 4px;
        margin-left: -31px;
        border-radius: 2px;
        background: linear-gradient(90deg, #00a8e0, #39f0c8);
    }

.section-subtitle {
    max-width: 860px;
    margin: 20px auto 0;
    font-size: 15px;
    line-height: 1.95;
    text-align: center;
    color: #6b7c93;
}

/* ---------------------------- 产品中心 ---------------------------- */
.product-section {
    background: linear-gradient(180deg, #eaf3fd 0%, #d6e7f8 100%);
}
.product-section .section-title {
    color: #0d2138;
}
.product-section .section-subtitle {
    color: #5b7290;
}

.product-grid {
    max-width: 1240px;
    margin: 54px auto 0;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 28px;
}

.product-card {
    overflow: hidden;
    border: 1px solid #dbe8f5;
    border-radius: 14px;
    background: #ffffff;
    box-shadow: 0 10px 26px rgba(16, 42, 67, .08);
    -webkit-transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
    transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}

    .product-card:hover {
        -webkit-transform: translateY(-8px);
        -ms-transform: translateY(-8px);
        transform: translateY(-8px);
        border-color: #7fc9e8;
        box-shadow: 0 20px 40px rgba(0, 132, 220, .16);
    }

    .product-card > div {
        height: 100%;
    }

    .product-card a {
        display: block;
    }

.product-image {
    display: block;
    width: 100%;
    height: 212px;
    object-fit: cover;
    -webkit-transition: transform .55s ease;
    transition: transform .55s ease;
}

.product-card:hover .product-image {
    -webkit-transform: scale(1.06);
    -ms-transform: scale(1.06);
    transform: scale(1.06);
}

.product-info {
    padding: 18px 20px 22px;
}

.product-title {
    display: block;
    font-size: 16px;
    font-weight: 600;
    line-height: 1.55;
    color: #12324f;
    -webkit-transition: color .2s ease;
    transition: color .2s ease;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

    .product-title:hover {
        color: #0089b3;
    }

/* 无图占位 */
.product-image--empty {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    width: 100%;
    height: 212px;
    font-size: 13px;
    letter-spacing: 2px;
    color: #9fb0c4;
    background: repeating-linear-gradient(45deg, #eef3f8, #eef3f8 12px, #e5edf6 12px, #e5edf6 24px);
}

/* 数据加载失败 / 空状态 */
.data-empty {
    grid-column: 1 / -1;
    padding: 46px 20px;
    border: 1px dashed #cfdce9;
    border-radius: 14px;
    background: #fbfdff;
    font-size: 14px;
    line-height: 2;
    text-align: center;
    color: #8a9bb0;
}

    .data-empty strong {
        display: block;
        margin-bottom: 6px;
        font-size: 15px;
        color: #6b7c93;
    }

/* ---------------------------- 关于我们 ---------------------------- */
.about-section {
    background: linear-gradient(180deg, #e4f4fb 0%, #cfe9f5 100%);
    border-top: 1px solid #c2e0ee;
}
.about-section .section-title {
    color: #0d2138;
}
.about-section .section-subtitle {
    color: #5b7290;
}

.about-content {
    max-width: 1240px;
    margin: 54px auto 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
}

.about-image {
    display: block;
    width: 100%;
    height: 384px;
    border-radius: 16px;
    object-fit: cover;
    box-shadow: 0 24px 54px rgba(16, 42, 67, .18);
}

/* 简介图片缺失时的占位块（与 .about-image 同尺寸） */
.about-image--empty {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    font-size: 13px;
    letter-spacing: 2px;
    color: #9fb0c4;
    background: repeating-linear-gradient(45deg, #eef3f8, #eef3f8 12px, #e5edf6 12px, #e5edf6 24px);
}

.about-text h3 {
    margin-bottom: 18px;
    font-size: 25px;
    font-weight: 700;
    line-height: 1.5;
    color: #12324f;
}

.about-text p {
    font-size: 15px;
    line-height: 2;
    text-align: justify;
    color: #475c72;
    word-break: break-all;
}

.about-btn {
    display: inline-block;
    margin-top: 28px;
    padding: 12px 36px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    color: #fff;
    background: linear-gradient(135deg, #0b8fd6, #00d4ff);
    box-shadow: 0 10px 24px rgba(0, 150, 220, .28);
    -webkit-transition: transform .25s ease, box-shadow .25s ease;
    transition: transform .25s ease, box-shadow .25s ease;
}

    .about-btn:hover,
    .about-btn:focus {
        -webkit-transform: translateY(-3px);
        -ms-transform: translateY(-3px);
        transform: translateY(-3px);
        box-shadow: 0 16px 34px rgba(0, 150, 220, .42);
        color: #fff;
    }

/* 荣誉证书横滑 */
.certificates-scroll {
    margin-top: 64px;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 12px;
    -webkit-overflow-scrolling: touch;
}

.certificates-container {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 20px;
    max-width: 1240px;
    min-height: 232px;
    margin: 0 auto;
}

.certificate-item {
    -webkit-box-flex: 0;
    -ms-flex: 0 0 190px;
    flex: 0 0 190px;
    height: 232px;
    padding: 10px;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -ms-flex-pack: center;
    justify-content: center;
    border: 1px solid #cfe2f3;
    border-radius: 12px;
    background: linear-gradient(180deg, #eef6ff 0%, #dbeaf9 100%);
    box-shadow: 0 8px 22px rgba(16, 42, 67, .10);
    -webkit-transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
    transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}

    .certificate-item:hover {
        -webkit-transform: translateY(-6px);
        -ms-transform: translateY(-6px);
        transform: translateY(-6px);
        border-color: #7fc9e8;
        box-shadow: 0 18px 38px rgba(0, 132, 220, .20);
    }

    .certificate-item a {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        width: 100%;
        height: 100%;
        -webkit-box-align: center;
        -ms-flex-align: center;
        align-items: center;
        -webkit-box-pack: center;
        -ms-flex-pack: center;
        justify-content: center;
    }

    .certificate-item img {
        max-width: 100%;
        max-height: 100%;
        object-fit: contain;
    }

    /* 后台未上传图片时，用标题文字兜底 */
    .certificate-text {
        padding: 0 6px;
        font-size: 13px;
        line-height: 1.8;
        text-align: center;
        color: #b8c9dc;
        display: -webkit-box;
        -webkit-line-clamp: 4;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }

/* ---------------------------- 我们的优势 ---------------------------- */
.features-section {
    overflow: hidden;
    background: linear-gradient(180deg, #e8f2fd 0%, #d5e7f9 100%);
}

    .features-section .section-title {
        color: #0d2138;
    }

    .features-section .section-subtitle {
        color: #5b7290;
    }

.features-grid {
    max-width: 1240px;
    margin: 54px auto 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 38px 24px 34px;
    text-align: center;
    border: 1px solid #dbe8f5;
    border-radius: 16px;
    background: #ffffff;
    box-shadow: 0 10px 26px rgba(16, 42, 67, .07);
    -webkit-transition: transform .3s ease, background .3s ease, border-color .3s ease, box-shadow .3s ease;
    transition: transform .3s ease, background .3s ease, border-color .3s ease, box-shadow .3s ease;
}

    .feature-card:hover {
        -webkit-transform: translateY(-6px);
        -ms-transform: translateY(-6px);
        transform: translateY(-6px);
        background: #ffffff;
        border-color: #7fc9e8;
        box-shadow: 0 20px 44px rgba(0, 140, 220, .18);
    }

.feature-icon {
    font-size: 38px;
    line-height: 1;
}

.feature-number {
    margin-top: 16px;
    font-size: 44px;
    font-weight: 700;
    line-height: 1;
    color: #0090c4;
    letter-spacing: 1px;
    text-shadow: 0 0 18px rgba(0, 144, 196, .18);
}

.feature-title {
    margin-top: 14px;
    font-size: 18px;
    font-weight: 600;
    color: #12324f;
}

.feature-desc {
    margin-top: 14px;
    font-size: 13.5px;
    line-height: 1.9;
    text-align: left;
    color: #5b7290;
}

/* ---------------------------- 底部 ---------------------------- */
.footer-section {
    padding: 76px 24px 0;
    color: #4a6379;
    background: linear-gradient(180deg, #eef6fe 0%, #dcebfa 100%);
    border-top: 1px solid #cfe2f3;
}

.footer-content {
    max-width: 1240px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.15fr 1fr 1fr;
    gap: 48px;
}

.footer-column h3 {
    position: relative;
    padding-bottom: 14px;
    margin-bottom: 20px;
    font-size: 17px;
    font-weight: 600;
    letter-spacing: 1px;
    color: #0d2138;
}

    .footer-column h3::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: 0;
        width: 36px;
        height: 3px;
        border-radius: 2px;
        background: linear-gradient(90deg, #00d4ff, #39f0c8);
    }

.footer-contact li,
.footer-column ul li {
    padding: 7px 0;
    font-size: 14px;
    line-height: 1.9;
    word-break: break-all;
}

.footer-column ul li a {
    color: #4a6379;
    -webkit-transition: color .2s ease, padding-left .2s ease;
    transition: color .2s ease, padding-left .2s ease;
}

    .footer-column ul li a:hover,
    .footer-column ul li a:focus {
        padding-left: 4px;
        color: #0079a8;
    }

.footer-qr {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    gap: 28px;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
}

.qr-item {
    font-size: 13px;
    color: #52697f;
    text-align: center;
}

    .qr-item img {
        display: block;
        width: 106px;
        height: 106px;
        margin-bottom: 10px;
        padding: 6px;
        border-radius: 8px;
        background: #fff;
        object-fit: contain;
    }

.footer-bottom {
    max-width: 1240px;
    margin: 60px auto 0;
    padding: 22px 0;
    border-top: 1px solid rgba(13, 33, 56, .14);
    font-size: 13px;
    text-align: center;
    color: #6b8199;
}

/* ---------------------------- iframe 子页容器 ---------------------------- */
.iframe-container {
    background: #fff;
}

#sub-frame {
    background: #fff;
}

/* ---------------------------- 滚动出现动画（仅在 JS 就绪时启用） ---------------------------- */
.fx-ready .product-card,
.fx-ready .feature-card,
.fx-ready .certificate-item,
.fx-ready .about-content > * {
    opacity: 0;
    -webkit-transform: translateY(26px);
    -ms-transform: translateY(26px);
    transform: translateY(26px);
    -webkit-transition: opacity .7s ease, transform .7s ease;
    transition: opacity .7s ease, transform .7s ease;
}

.fx-ready .is-in {
    opacity: 1;
    -webkit-transform: translateY(0);
    -ms-transform: translateY(0);
    transform: translateY(0);
}

/* ---------------------------- 关键帧 ---------------------------- */
@-webkit-keyframes fxFadeUp {
    from {
        opacity: 0;
        -webkit-transform: translateY(26px);
        transform: translateY(26px);
    }

    to {
        opacity: 1;
        -webkit-transform: translateY(0);
        transform: translateY(0);
    }
}

@keyframes fxFadeUp {
    from {
        opacity: 0;
        -webkit-transform: translateY(26px);
        transform: translateY(26px);
    }

    to {
        opacity: 1;
        -webkit-transform: translateY(0);
        transform: translateY(0);
    }
}

@-webkit-keyframes fxBounce {
    0%, 100% {
        -webkit-transform: translateY(0);
        transform: translateY(0);
    }

    50% {
        -webkit-transform: translateY(10px);
        transform: translateY(10px);
    }
}

@keyframes fxBounce {
    0%, 100% {
        -webkit-transform: translateY(0);
        transform: translateY(0);
    }

    50% {
        -webkit-transform: translateY(10px);
        transform: translateY(10px);
    }
}

/* ---------------------------- 响应式 ---------------------------- */
@media (max-width: 1200px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .about-image {
        height: 300px;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
    }

    .certificates-container {
        padding: 0 4px;
    }
}

@media (max-width: 820px) {
    .nav-content {
        padding: 0 16px;
        gap: 12px;
    }

    .nav-logo {
        font-size: 16px;
        padding-left: 20px;
    }

        .nav-logo::before {
            width: 9px;
            height: 9px;
            margin-top: -4.5px;
        }

    .nav-menu {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }

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

        .nav-menu a {
            padding: 8px 11px;
            font-size: 14px;
        }

            .nav-menu a::after {
                left: 11px;
                right: 11px;
            }

    .section {
        padding: 72px 18px;
    }

    .product-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .product-image,
    .product-image--empty {
        height: 190px;
    }

    .feature-number {
        font-size: 38px;
    }
}

@media (max-width: 640px) {
    .hero-section {
        min-height: 92vh;
        padding: 110px 18px 70px;
    }

    .hero-title {
        letter-spacing: 1px;
    }

    .hero-subtitle {
        letter-spacing: 2px;
    }

    .hero-btn {
        margin-top: 34px;
        padding: 12px 36px;
        font-size: 15px;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }

    .footer-section {
        padding: 56px 18px 0;
    }

    .footer-bottom {
        margin-top: 40px;
    }

    .certificate-item {
        -ms-flex: 0 0 150px;
        flex: 0 0 150px;
        height: 196px;
    }
}

/* ---------------------------- 降低动效偏好 ---------------------------- */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .hero-title,
    .hero-subtitle,
    .hero-btn,
    .hero-scroll {
        -webkit-animation: none;
        animation: none;
    }

    .fx-ready .product-card,
    .fx-ready .feature-card,
    .fx-ready .certificate-item,
    .fx-ready .about-content > * {
        opacity: 1;
        -webkit-transform: none;
        -ms-transform: none;
        transform: none;
        -webkit-transition: none;
        transition: none;
    }
}