/* mk-13 站点样式：白底分区、绿色主行动、橙色提示标签、参数密度优先 */

:root {
    --ink: #1c1c1e;
    --ink-soft: #55555b;
    --ink-mute: #86868b;
    --line: #e3e3e6;
    --line-soft: #f0f0f2;
    --soft: #f5f5f7;
    --green: #1e8a4f;
    --green-dark: #15693b;
    --green-soft: #eef7f1;
    --orange: #d97706;
    --orange-soft: #fdf3e4;
    --maxw: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

html body {
    margin: 0;
    background: #ffffff;
    color: var(--ink);
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.72;
    letter-spacing: 0.01em;
}

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

body p {
    margin: 0 0 12px;
}

body h1,
body h2,
body h3 {
    margin: 0 0 12px;
    line-height: 1.35;
    font-weight: 600;
    text-align: left;
}

body h1 {
    font-size: 30px;
    letter-spacing: 0.01em;
}

body h2 {
    font-size: 21px;
}

body h3 {
    font-size: 16px;
}

body ul,
body ol,
body dl,
body figure {
    margin: 0;
    padding: 0;
}

body li {
    list-style: none;
}

body img {
    display: block;
    width: 100%;
    max-width: 100%;
    max-height: 520px;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    object-position: center;
    background: var(--soft);
}

body table {
    border-collapse: collapse;
    width: 100%;
}

caption {
    caption-side: top;
    text-align: left;
    color: var(--ink-mute);
    font-size: 13px;
    padding: 0 0 10px;
}

.wrap {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 20px;
}

.band {
    background: var(--soft);
}

.sec {
    padding: 52px 0;
}

.sec-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--line);
    margin-bottom: 26px;
}

.sec-head h2 {
    margin: 0;
}

.sec-note {
    margin: 0;
    max-width: 560px;
    color: var(--ink-soft);
    font-size: 13px;
    text-align: right;
}

.sub-head {
    margin: 32px 0 16px;
    padding-left: 10px;
    border-left: 3px solid var(--green);
    font-size: 17px;
}

.tag-orange {
    display: inline-block;
    padding: 2px 8px;
    background: var(--orange-soft);
    color: var(--orange);
    border: 1px solid #f0d3a8;
    font-size: 12px;
    line-height: 1.6;
}

.btn {
    display: inline-block;
    padding: 11px 22px;
    font-size: 14px;
    line-height: 1.4;
    border: 1px solid transparent;
    text-align: center;
}

.btn-solid {
    background: var(--green);
    color: #ffffff;
}

.btn-solid:hover {
    background: var(--green-dark);
}

.btn-line {
    border-color: var(--ink);
    color: var(--ink);
    background: #ffffff;
}

.btn-line:hover {
    border-color: var(--green);
    color: var(--green);
}

.link-arrow {
    display: inline-block;
    color: var(--green);
    font-size: 14px;
    border-bottom: 1px solid var(--green);
}

/* 页头与 MegaMenu */

.mall-head {
    position: sticky;
    top: 0;
    z-index: 40;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
}

.mall-head.is-scrolled {
    border-bottom-color: #d8d8dc;
}

.head-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 20px;
    min-height: 62px;
}

.brand {
    font-size: 17px;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: 0.02em;
    white-space: nowrap;
}

.head-nav {
    flex: 1 1 auto;
}

.nav-list {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 22px;
}

.nav-list > li > a {
    display: block;
    padding: 8px 2px;
    font-size: 14px;
    color: var(--ink);
}

.nav-list > li > a:hover {
    color: var(--green);
}

.has-mega {
    position: relative;
}

.mega-panel {
    display: none;
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: min(1080px, calc(100vw - 32px));
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    padding: 22px 24px 16px;
    background: #ffffff;
    border: 1px solid var(--line);
    z-index: 30;
}

.has-mega:hover .mega-panel,
.has-mega:focus-within .mega-panel {
    display: grid;
}

.mega-col-title {
    margin: 0 0 8px;
    font-size: 13px;
    color: var(--ink-mute);
    border-bottom: 1px solid var(--line-soft);
    padding-bottom: 6px;
}

.mega-col li a {
    display: block;
    padding: 5px 0;
    font-size: 13px;
    color: var(--ink-soft);
}

.mega-col li a:hover {
    color: var(--green);
}

.mega-foot {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 6px;
    padding-top: 12px;
    border-top: 1px solid var(--line);
    font-size: 13px;
    color: var(--ink-mute);
}

.mega-foot a {
    color: var(--green);
}

.head-tools {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--ink-soft);
}

.head-tools a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.head-tools a:hover {
    color: var(--green);
}

.nav-toggle {
    display: none;
    align-items: center;
    gap: 6px;
    padding: 7px 12px;
    background: #ffffff;
    border: 1px solid var(--line);
    color: var(--ink);
    font-size: 13px;
    cursor: pointer;
}

/* 首页 Hero：产品族错位图栈 */

.family-hero {
    padding: 46px 0 40px;
    border-bottom: 1px solid var(--line);
}

.hero-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 40px;
    align-items: center;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 20px;
}

.hero-kicker {
    margin: 0 0 10px;
    font-size: 13px;
    color: var(--green);
    letter-spacing: 0.04em;
}

.family-copy h1 {
    font-size: 32px;
    margin-bottom: 16px;
}

.family-copy p {
    color: var(--ink-soft);
    font-size: 14px;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 20px;
}

.family-stack {
    display: flex;
    flex-direction: column;
}

.stack-item {
    position: relative;
    padding: 6px;
    background: #ffffff;
    border: 1px solid var(--line);
}

.stack-item + .stack-item {
    margin-top: -24px;
}

.stack-one {
    width: 78%;
    margin-left: auto;
    z-index: 3;
}

.stack-two {
    width: 70%;
    margin-left: auto;
    z-index: 2;
}

.stack-three {
    width: 62%;
    margin-left: auto;
    z-index: 1;
}

.stack-item img {
    aspect-ratio: 4 / 3;
    max-height: 260px;
}

.stack-three img {
    aspect-ratio: 3 / 4;
    max-height: 300px;
    object-position: center 22%;
}

.stack-item figcaption {
    padding: 6px 2px 0;
    font-size: 12px;
    color: var(--ink-mute);
}

/* 产品族行式列表 */

.family-list {
    border-top: 1px solid var(--line);
}

.fam-row {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 28px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.fam-figure img {
    aspect-ratio: 16 / 9;
    max-height: 210px;
}

.fam-row:nth-child(2) .fam-figure img {
    aspect-ratio: 16 / 10;
    object-position: center 18%;
}

.fam-row:nth-child(3) .fam-figure img {
    aspect-ratio: 3 / 2;
    object-position: left center;
}

.fam-row:nth-child(4) .fam-figure img {
    aspect-ratio: 16 / 9;
    object-position: right center;
}

.fam-info h3 {
    margin-bottom: 8px;
}

.fam-info p {
    color: var(--ink-soft);
    font-size: 14px;
}

.param-dl {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--line-soft);
}

.param-dl dt {
    font-size: 12px;
    color: var(--ink-mute);
}

.param-dl dd {
    margin: 2px 0 0;
    font-size: 13px;
    color: var(--ink);
}

/* 对照表 */

.table-scroll {
    width: 100%;
    overflow-x: auto;
}

.compare {
    table-layout: fixed;
    min-width: 760px;
    border: 1px solid var(--line);
}

.compare th,
.compare td {
    padding: 10px 12px;
    font-size: 13px;
    text-align: left;
    border-bottom: 1px solid var(--line);
}

.compare thead th {
    background: #ffffff;
    font-weight: 600;
    border-bottom: 1px solid var(--ink);
}

.compare tbody th {
    width: 22%;
    background: var(--soft);
    font-weight: 500;
    color: var(--ink-soft);
}

.compare tbody tr:hover th {
    background: var(--green-soft);
    color: var(--green-dark);
}

.compare-after {
    margin-top: 18px;
    color: var(--ink-soft);
    font-size: 14px;
}

/* 版本块与下载块 */

.version-grid,
.dl-blocks,
.std-grid,
.support-grid {
    display: grid;
    gap: 20px;
}

.version-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.ver-block {
    padding: 20px 18px;
    background: #ffffff;
    border: 1px solid var(--line);
}

.ver-block h3 {
    margin-top: 10px;
}

.ver-block p {
    color: var(--ink-soft);
    font-size: 13px;
}

.dl-split {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 32px;
    align-items: start;
}

.dl-copy p {
    color: var(--ink-soft);
    font-size: 14px;
}

.dl-copy figure {
    margin-top: 16px;
}

.dl-copy img {
    aspect-ratio: 16 / 9;
    max-height: 150px;
    object-position: center 30%;
}

.dl-blocks {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.dl-block {
    display: block;
    padding: 20px 16px;
    background: #ffffff;
    border: 1px solid var(--line);
}

.dl-block:hover {
    border-color: var(--green);
}

.dl-block i {
    font-size: 20px;
    color: var(--green);
}

.dl-block h3 {
    margin: 10px 0 8px;
}

.dl-block p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 13px;
}

/* 安全保障 */

.safety-rows {
    border-top: 1px solid var(--line);
}

.safety-row {
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: 24px;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.safety-row h3 {
    margin: 0;
}

.safety-row p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 14px;
}

.safety-band {
    margin-top: 26px;
}

.safety-band img {
    aspect-ratio: 4 / 1;
    max-height: 260px;
    object-position: center 40%;
}

.safety-band figcaption {
    max-width: var(--maxw);
    margin: 8px auto 0;
    padding: 0 20px;
    font-size: 12px;
    color: var(--ink-mute);
}

/* 支持区 */

.support-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.sup-card {
    display: block;
    padding: 18px 16px;
    background: #ffffff;
    border: 1px solid var(--line);
}

.sup-card:hover {
    border-color: var(--green);
}

.sup-card h3 {
    margin: 0 0 6px;
    font-size: 15px;
}

.sup-card p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 13px;
}

.sup-card span {
    display: inline-block;
    margin-top: 10px;
    font-size: 12px;
    color: var(--green);
}

.faq-mini {
    border-top: 1px solid var(--line);
}

.faq-row {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 5fr) minmax(0, 2fr);
    gap: 20px;
    align-items: start;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}

.faq-row h3 {
    margin: 0;
    font-size: 15px;
}

.faq-row p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 13px;
}

.faq-row a {
    font-size: 13px;
    color: var(--green);
    text-align: right;
}

/* 内页页头 */

.page-head {
    padding: 44px 0 30px;
    border-bottom: 1px solid var(--line);
}

.page-head h1 {
    margin-bottom: 12px;
}

.page-lede {
    max-width: 760px;
    margin: 0;
    color: var(--ink-soft);
    font-size: 14px;
}

.page-anchors {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 18px;
    font-size: 13px;
}

.page-anchors a {
    color: var(--green);
    border-bottom: 1px solid var(--green);
}

/* 关于页 */

.about-mall {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 32px;
    align-items: start;
}

.about-visual img {
    aspect-ratio: 3 / 2;
    max-height: 300px;
}

.about-visual figcaption,
.about-supply figcaption {
    margin-top: 8px;
    font-size: 12px;
    color: var(--ink-mute);
}

.about-text p {
    color: var(--ink-soft);
    font-size: 14px;
}

.about-standards {
    padding: 46px 0;
}

.std-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.std-card {
    padding: 20px 18px;
    background: #ffffff;
    border: 1px solid var(--line);
}

.std-card h3 {
    font-size: 15px;
}

.std-dl dt {
    font-size: 12px;
    color: var(--ink-mute);
    padding-top: 8px;
}

.std-dl dd {
    margin: 2px 0 0;
    font-size: 13px;
    color: var(--ink-soft);
}

.about-supply {
    padding: 46px 0 54px;
}

.supply-dl {
    margin-top: 18px;
    border-top: 1px solid var(--line);
}

.supply-dl > div {
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: 20px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
}

.supply-dl dt {
    font-size: 14px;
    font-weight: 600;
}

.supply-dl dd {
    margin: 0;
    font-size: 13px;
    color: var(--ink-soft);
}

.supply-band img {
    aspect-ratio: 4 / 1;
    max-height: 220px;
    object-position: left center;
    margin-top: 22px;
}

/* 产品页 */

.prod-detail {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 32px;
    align-items: start;
    padding: 44px 0;
}

.prod-aside {
    border: 1px solid var(--line);
    padding: 18px 16px;
}

.prod-aside h2 {
    font-size: 16px;
    margin-bottom: 12px;
}

.prod-nav a {
    display: block;
    padding: 9px 0 9px 12px;
    font-size: 14px;
    color: var(--ink-soft);
    border-left: 3px solid transparent;
    border-bottom: 1px solid var(--line-soft);
}

.prod-nav a[aria-current="true"] {
    border-left-color: var(--green);
    color: var(--ink);
    font-weight: 600;
}

.prod-nav a:hover {
    color: var(--green);
}

.prod-main figure img {
    aspect-ratio: 16 / 9;
    max-height: 330px;
}

.spec-dl {
    margin: 22px 0;
    border-top: 1px solid var(--line);
}

.spec-dl > div {
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 18px;
    padding: 10px 0;
    border-bottom: 1px solid var(--line);
}

.spec-dl dt {
    font-size: 13px;
    color: var(--ink-mute);
}

.spec-dl dd {
    margin: 0;
    font-size: 13px;
}

.prod-main p {
    color: var(--ink-soft);
    font-size: 14px;
}

.prod-alt {
    padding: 10px 0 50px;
}

.alt-block {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 30px;
    align-items: center;
    padding: 26px 0;
    border-top: 1px solid var(--line);
}

.alt-block-flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
}

.alt-block-flip .alt-media {
    order: 2;
}

.alt-media img {
    aspect-ratio: 4 / 3;
    max-height: 240px;
}

.alt-block-flip .alt-media img {
    aspect-ratio: 3 / 4;
    max-height: 300px;
    object-position: center 25%;
}

.alt-block p {
    color: var(--ink-soft);
    font-size: 14px;
}

.alt-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-top: 14px;
}

.alt-grid dl {
    padding: 12px 14px;
    border: 1px solid var(--line);
    background: #ffffff;
}

.alt-grid dt {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
}

.alt-grid dd {
    margin: 0 0 4px;
    font-size: 13px;
    color: var(--ink-soft);
}

.mini-table {
    margin-top: 14px;
    border: 1px solid var(--line);
}

.mini-table th,
.mini-table td {
    padding: 9px 12px;
    font-size: 13px;
    text-align: left;
    border-bottom: 1px solid var(--line);
}

.mini-table th {
    background: var(--soft);
    color: var(--ink-soft);
    font-weight: 500;
}

/* 资讯页 */

.news-mall {
    padding: 44px 0 20px;
}

.news-lead {
    display: grid;
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 30px;
    align-items: center;
    padding-bottom: 30px;
    border-bottom: 1px solid var(--line);
}

.news-lead figure img {
    aspect-ratio: 4 / 3;
    max-height: 280px;
}

.news-lead p {
    color: var(--ink-soft);
    font-size: 14px;
}

.news-lead .lead-band img {
    aspect-ratio: 16 / 9;
    max-height: 120px;
    object-position: center 65%;
    margin-top: 14px;
}

.news-list {
    padding: 8px 0 30px;
    border-top: 1px solid var(--line);
}

.news-item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 9fr) minmax(0, 2fr);
    gap: 18px;
    align-items: start;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}

.news-item h3 {
    margin: 0;
    font-size: 15px;
}

.news-item p {
    margin: 4px 0 0;
    color: var(--ink-soft);
    font-size: 13px;
}

.news-quarter {
    font-size: 12px;
    color: var(--ink-mute);
    text-align: right;
}

.news-note {
    padding: 26px 0 50px;
}

.news-note p {
    color: var(--ink-soft);
    font-size: 14px;
}

/* 联系页 */

.contact-block {
    padding: 44px 0;
}

.contact-mall {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 32px;
    padding: 0 20px;
    align-items: start;
}

.srv-block {
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
}

.srv-block h3 {
    margin-bottom: 6px;
    font-size: 15px;
}

.srv-block p {
    margin: 0 0 6px;
    color: var(--ink-soft);
    font-size: 13px;
}

.contact-side figure {
    margin-top: 18px;
}

.contact-side img {
    aspect-ratio: 4 / 3;
    max-height: 210px;
    object-position: center 20%;
}

.contact-form {
    padding: 22px 20px;
    background: #ffffff;
    border: 1px solid var(--line);
}

.field {
    margin-bottom: 14px;
}

.field label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    color: var(--ink-soft);
}

.field input,
.field textarea {
    width: 100%;
    padding: 9px 10px;
    font-family: inherit;
    font-size: 14px;
    color: var(--ink);
    background: #ffffff;
    border: 1px solid var(--line);
    border-radius: 0;
}

.field textarea {
    min-height: 108px;
    resize: vertical;
}

.form-note {
    margin: 12px 0 0;
    font-size: 12px;
    color: var(--ink-mute);
}

.form-status {
    margin: 10px 0 0;
    font-size: 13px;
    color: var(--green);
}

.contact-faq {
    padding: 30px 0 50px;
    border-top: 1px solid var(--line);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px;
}

.faq-card {
    padding: 18px 16px;
    background: #ffffff;
    border: 1px solid var(--line);
}

.faq-card h3 {
    margin-bottom: 8px;
    font-size: 15px;
}

.faq-card p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 13px;
}

.contact-band img {
    aspect-ratio: 4 / 1;
    max-height: 180px;
    object-position: right center;
    margin-top: 24px;
}

/* 指南页 */

.guide-head {
    padding: 44px 0 30px;
    background: #ffffff;
    border-bottom: 1px solid var(--line);
}

.guide-head img {
    aspect-ratio: 4 / 1;
    max-height: 190px;
    object-position: center 55%;
    margin-top: 20px;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    padding: 44px 0;
}

.guide-steps li {
    padding: 20px 16px;
    background: #ffffff;
    border: 1px solid var(--line);
}

.step-num {
    display: block;
    font-size: 26px;
    line-height: 1;
    color: var(--green);
    margin-bottom: 10px;
}

.guide-steps h3 {
    font-size: 15px;
}

.guide-steps p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 13px;
}

.guide-table {
    padding: 40px 0 30px;
    border-top: 1px solid var(--line);
}

.guide-table figure {
    margin-top: 20px;
}

.guide-table img {
    aspect-ratio: 16 / 9;
    max-height: 190px;
    object-position: center 35%;
}

.guide-table figcaption {
    margin-top: 8px;
    font-size: 12px;
    color: var(--ink-mute);
}

.guide-faq {
    padding: 30px 0 50px;
    border-top: 1px solid var(--line);
}

.guide-table table {
    border: 1px solid var(--line);
    table-layout: fixed;
    min-width: 680px;
}

.guide-table th,
.guide-table td {
    padding: 10px 12px;
    font-size: 13px;
    text-align: left;
    border-bottom: 1px solid var(--line);
}

.guide-table thead th {
    background: var(--soft);
    font-weight: 600;
}

.guide-table tbody th {
    font-weight: 500;
}

/* 页脚 */

.mall-foot {
    background: var(--soft);
    border-top: 1px solid var(--line);
    padding: 40px 0 24px;
}

.foot-cols {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(0, 1fr);
    gap: 28px;
}

.foot-col h3 {
    font-size: 14px;
    margin-bottom: 10px;
}

.foot-col li a {
    display: block;
    padding: 4px 0;
    font-size: 13px;
    color: var(--ink-soft);
}

.foot-col li a:hover {
    color: var(--green);
}

.foot-about p {
    margin: 0 0 10px;
    font-size: 13px;
    color: var(--ink-soft);
}

.foot-pages {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    margin-top: 26px;
    padding-top: 16px;
    border-top: 1px solid var(--line);
    font-size: 13px;
}

.foot-pages a {
    color: var(--ink-soft);
}

.foot-pages a:hover {
    color: var(--green);
}

.foot-copy {
    margin: 14px 0 0;
    font-size: 12px;
    color: var(--ink-mute);
}

/* 响应式：1024 / 900 / 640 */

@media (max-width: 1024px) {
    .sec {
        padding: 40px 0;
    }

    .support-grid,
    .version-grid,
    .dl-blocks,
    .std-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

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

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

@media (max-width: 900px) {
    .nav-toggle {
        display: inline-flex;
    }

    .head-nav {
        position: static;
    }

    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0;
        padding: 12px 16px 18px;
        background: #ffffff;
        border: 1px solid var(--line);
        max-height: 78vh;
        overflow-y: auto;
    }

    .mall-head.is-open .nav-list {
        display: flex;
    }

    .nav-list > li > a {
        padding: 11px 2px;
        border-bottom: 1px solid var(--line-soft);
    }

    .mega-panel,
    .has-mega:hover .mega-panel,
    .has-mega:focus-within .mega-panel {
        position: static;
        display: grid;
        transform: none;
        width: 100%;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        border: 0;
        padding: 10px 0 4px;
    }

    .mega-foot {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .hero-grid,
    .about-mall,
    .prod-detail,
    .news-lead,
    .contact-mall,
    .dl-split,
    .alt-block,
    .alt-block-flip {
        grid-template-columns: minmax(0, 1fr);
    }

    .alt-block-flip .alt-media {
        order: 0;
    }

    .family-hero {
        padding: 30px 0 32px;
    }

    .family-stack {
        margin-top: 26px;
    }

    .fam-row,
    .safety-row,
    .supply-dl > div,
    .spec-dl > div,
    .faq-row,
    .news-item {
        grid-template-columns: minmax(0, 1fr);
    }

    .sec-head {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .sec-note {
        text-align: left;
    }

    .faq-row a,
    .news-quarter {
        text-align: left;
    }

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

@media (max-width: 640px) {
    body h1 {
        font-size: 24px;
    }

    .family-copy h1 {
        font-size: 25px;
    }

    .support-grid,
    .version-grid,
    .dl-blocks,
    .std-grid,
    .guide-steps,
    .param-dl,
    .alt-grid,
    .faq-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .head-tools a span {
        display: none;
    }

    .stack-one,
    .stack-two,
    .stack-three {
        width: 100%;
        margin-left: 0;
    }

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