/* mk-29 深色核心科技专题站 —— 全站样式表 */

:root {
    --bg-deep: #0d1117;
    --bg-panel: #161c24;
    --line: #232b36;
    --tech-green: #2fbf71;
    --text-main: #e6edf3;
    --text-dim: #7d8794;
    --mono: "SFMono-Regular", "Menlo", "Consolas", monospace;
    --shell: 1180px;
}

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

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

html body {
    margin: 0;
    background-color: var(--bg-deep);
    color: var(--text-main);
    font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
    font-size: 15.5px;
    line-height: 1.9;
}

body img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    object-fit: cover;
    filter: saturate(0.85);
    background-color: var(--bg-panel);
}

body a {
    color: var(--tech-green);
    text-decoration: none;
}

a:hover {
    color: #6fdca0;
}

body p {
    margin: 0 0 14px;
}

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

.wrap {
    width: 100%;
    max-width: var(--shell);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

.mono {
    font-family: var(--mono);
    letter-spacing: 0.06em;
}

/* ---------- 页头 ---------- */

.tech-head {
    position: sticky;
    top: 0;
    z-index: 40;
    background-color: #0d1117;
    border-bottom: 1px solid transparent;
}

.tech-head.is-scrolled {
    border-bottom-color: rgba(47, 191, 113, 0.5);
}

.head-inner {
    display: flex;
    align-items: center;
    gap: 20px;
    min-height: 64px;
}

.brand {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 10px;
    color: var(--text-main);
    font-weight: 700;
    font-size: 16px;
}

.brand::before {
    content: "";
    width: 9px;
    height: 9px;
    background-color: var(--tech-green);
    align-self: center;
}

.brand-sub {
    color: var(--text-dim);
    font-weight: 400;
    font-size: 12px;
    letter-spacing: 0.04em;
}

.tech-nav {
    margin-left: auto;
}

.tech-nav ul {
    display: flex;
    gap: 26px;
}

.tech-nav a {
    color: var(--text-main);
    font-size: 14px;
    padding-bottom: 3px;
    border-bottom: 1px solid transparent;
}

.tech-nav a:hover,
.tech-nav a.is-current {
    color: var(--tech-green);
    border-bottom-color: var(--tech-green);
}

.tech-entry {
    display: inline-block;
    flex: none;
    padding: 7px 18px;
    font-size: 13px;
    color: var(--tech-green);
    border: 1px solid var(--tech-green);
}

.tech-entry:hover {
    background-color: rgba(47, 191, 113, 0.12);
    color: var(--tech-green);
}

.nav-drawer {
    display: none;
    margin-left: auto;
    position: relative;
}

.nav-drawer summary {
    cursor: pointer;
    padding: 7px 14px;
    font-size: 13px;
    color: var(--tech-green);
    border: 1px solid var(--line);
    list-style: none;
}

.nav-drawer summary::-webkit-details-marker {
    display: none;
}

.nav-drawer ul {
    position: absolute;
    right: 0;
    top: 44px;
    min-width: 190px;
    padding: 10px 0;
    background-color: var(--bg-panel);
    border: 1px solid var(--line);
}

.nav-drawer li a {
    display: block;
    padding: 9px 18px;
    color: var(--text-main);
    font-size: 14px;
}

.nav-drawer li a:hover {
    color: var(--tech-green);
    background-color: rgba(47, 191, 113, 0.08);
}

/* ---------- Hero 技术宣言 ---------- */

.tech-statement {
    border-bottom: 1px solid var(--line);
    padding-top: 58px;
}

.statement-copy {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
    padding: 0 24px 40px;
}

.statement-label {
    display: inline-block;
    margin-bottom: 16px;
    padding: 4px 14px;
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--tech-green);
    border: 1px solid rgba(47, 191, 113, 0.45);
}

.statement-copy h1 {
    margin: 0 0 18px;
    font-size: clamp(30px, 4.6vw, 48px);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-main);
}

.statement-copy p {
    color: var(--text-dim);
    margin-bottom: 26px;
}

.statement-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 18px;
}

.cta-outline {
    display: inline-block;
    padding: 10px 26px;
    font-size: 14px;
    color: var(--tech-green);
    border: 1px solid var(--tech-green);
}

.cta-outline:hover {
    background-color: rgba(47, 191, 113, 0.12);
}

.cta-plain {
    font-size: 14px;
    color: var(--text-main);
    border-bottom: 1px solid var(--line);
}

.cta-plain:hover {
    color: var(--tech-green);
    border-bottom-color: var(--tech-green);
}

.statement-visual {
    position: relative;
    overflow: hidden;
    border-top: 1px solid var(--line);
}

.statement-visual img {
    aspect-ratio: 1902 / 761;
    max-height: 520px;
    object-position: center 42%;
}

.statement-grid {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        repeating-linear-gradient(to right, rgba(47, 191, 113, 0.1) 0 1px, transparent 1px 24px),
        repeating-linear-gradient(to bottom, rgba(47, 191, 113, 0.1) 0 1px, transparent 1px 24px);
}

.statement-scan {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image: linear-gradient(
        to bottom,
        rgba(47, 191, 113, 0) 0%,
        rgba(47, 191, 113, 0.14) 46%,
        rgba(47, 191, 113, 0.3) 50%,
        rgba(47, 191, 113, 0.14) 54%,
        rgba(47, 191, 113, 0) 100%
    );
    animation: scan-sweep 7s linear infinite;
}

@keyframes scan-sweep {
    0% {
        transform: translateY(-100%);
    }

    100% {
        transform: translateY(100%);
    }
}

/* ---------- 通用分区 ---------- */

.sec {
    padding-top: 70px;
    padding-bottom: 70px;
    border-top: 1px solid var(--line);
}

.sec-panel {
    background-color: var(--bg-panel);
}

.sec h2 {
    margin: 0 0 16px;
    font-size: 26px;
    font-weight: 700;
    line-height: 1.4;
}

.sec h3 {
    margin: 0 0 8px;
    font-size: 17px;
    font-weight: 700;
}

.sec-kicker {
    margin-bottom: 10px;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--tech-green);
}

.sec-lead {
    max-width: 780px;
    color: var(--text-dim);
}

.sec-note {
    color: var(--text-dim);
    font-size: 13px;
}

/* ---------- 编号技术条目 ---------- */

.tech-numbered {
    margin-top: 28px;
    border: 1px solid var(--line);
    background-color: var(--bg-panel);
}

.tech-num {
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: 0 20px;
    padding: 32px;
    border-top: 1px solid var(--line);
}

.tech-num:first-child {
    border-top: 0;
}

.tech-num .num {
    font-family: var(--mono);
    font-size: 26px;
    letter-spacing: 0.06em;
    color: var(--tech-green);
}

.tech-body p {
    color: var(--text-dim);
    margin-bottom: 10px;
}

.tech-body p:last-child {
    margin-bottom: 0;
}

/* ---------- 玩法两栏 ---------- */

.play-duo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 42px;
    align-items: start;
}

.play-list {
    margin-top: 22px;
    border-top: 1px solid var(--line);
}

.play-list li {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.play-list p {
    margin: 0;
    color: var(--text-dim);
}

.play-figure {
    margin: 0;
    border: 1px solid var(--line);
}

.play-figure img {
    aspect-ratio: 3 / 2;
}

.play-figure figcaption {
    padding: 12px 18px;
    font-size: 13px;
    color: var(--text-dim);
    border-top: 1px solid var(--line);
}

/* ---------- 数据面板示例 ---------- */

.live-board {
    margin-top: 26px;
    padding: 32px;
    border: 1px solid var(--line);
    background-color: var(--bg-panel);
}

.live-row {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
}

.live-key {
    color: var(--text-dim);
}

.live-val {
    font-family: var(--mono);
    font-size: 13px;
    letter-spacing: 0.06em;
    color: var(--tech-green);
}

.live-chart {
    margin: 26px 0 12px;
}

.live-chart-head {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-dim);
    margin-bottom: 10px;
}

.live-bar {
    height: 16px;
    border: 1px solid var(--line);
    background-color: var(--bg-deep);
}

.live-bar span {
    display: block;
    height: 100%;
    background-image: linear-gradient(to right, rgba(47, 191, 113, 0.45), #2fbf71);
}

.live-note {
    margin: 0;
    font-size: 13px;
    color: var(--text-dim);
}

.band-figure {
    margin: 30px 0 0;
    border: 1px solid var(--line);
}

.band-figure img {
    aspect-ratio: 6 / 1;
    max-height: 220px;
    object-position: center 55%;
}

.band-figure figcaption {
    padding: 10px 18px;
    font-size: 13px;
    color: var(--text-dim);
    border-top: 1px solid var(--line);
}

.band-figure-alt img {
    aspect-ratio: 7 / 1;
    object-position: center 28%;
}

/* ---------- 四端网格 ---------- */

.client-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 28px;
}

.client-block {
    padding: 24px;
    border: 1px solid var(--line);
    background-color: var(--bg-deep);
}

.client-ico {
    display: inline-block;
    margin-bottom: 12px;
    font-size: 20px;
    color: var(--tech-green);
}

.client-block h3 {
    font-size: 16px;
}

.client-block img {
    margin: 14px 0 12px;
    aspect-ratio: 16 / 10;
    max-height: 150px;
}

.client-block p {
    margin: 0;
    font-size: 14px;
    color: var(--text-dim);
}

/* ---------- 获取说明 ---------- */

.dl-tech {
    border: 1px solid var(--line);
    background-color: var(--bg-panel);
    padding: 32px;
}

.dl-rows {
    margin: 20px 0 24px;
    border-top: 1px solid var(--line);
}

.dl-row {
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: 18px;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.dl-row .dl-num {
    font-family: var(--mono);
    font-size: 14px;
    letter-spacing: 0.06em;
    color: var(--tech-green);
}

.dl-row p {
    margin: 0;
    color: var(--text-dim);
}

/* ---------- 服务三行 ---------- */

.svc-tech {
    margin-top: 26px;
    border-top: 1px solid var(--line);
}

.svc-row {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 28px;
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.svc-row h3 {
    margin: 0;
}

.svc-row p {
    margin: 0;
    color: var(--text-dim);
}

/* ---------- 资讯行 ---------- */

.news-tech-2 {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 36px;
}

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

.news-item {
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}

.news-date {
    display: block;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--tech-green);
    margin-bottom: 6px;
}

.news-item h3 {
    margin-bottom: 6px;
    font-size: 16px;
}

.news-item p {
    margin: 0;
    font-size: 14px;
    color: var(--text-dim);
}

.news-figs {
    display: grid;
    gap: 20px;
}

.news-figs figure {
    margin: 0;
    border: 1px solid var(--line);
}

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

.news-figs figure:last-child img {
    object-position: center 20%;
}

.news-figs figcaption {
    padding: 10px 14px;
    font-size: 12px;
    color: var(--text-dim);
    border-top: 1px solid var(--line);
}

.news-more {
    margin-top: 22px;
}

/* ---------- 内页页头 ---------- */

.page-head {
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
    padding-top: 56px;
    padding-bottom: 46px;
    background-color: var(--bg-panel);
}

.page-head::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        repeating-linear-gradient(to right, rgba(47, 191, 113, 0.08) 0 1px, transparent 1px 24px),
        repeating-linear-gradient(to bottom, rgba(47, 191, 113, 0.08) 0 1px, transparent 1px 24px);
}

.page-head .wrap {
    position: relative;
}

.page-head h1 {
    margin: 0 0 16px;
    font-size: clamp(26px, 3.6vw, 40px);
    font-weight: 700;
    line-height: 1.35;
}

.page-head .sec-lead {
    margin-bottom: 0;
}

.page-head-figure {
    margin: 32px 0 0;
    border: 1px solid var(--line);
}

.page-head-figure img {
    aspect-ratio: 5 / 2;
    max-height: 340px;
    object-position: center 45%;
}

/* ---------- about ---------- */

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
    margin-top: 28px;
    border: 1px solid var(--line);
}

.about-col {
    padding: 30px;
    border-left: 1px solid var(--line);
    background-color: var(--bg-panel);
}

.about-col:first-child {
    border-left: 0;
}

.about-col h2 {
    font-size: 20px;
}

.about-col p {
    color: var(--text-dim);
    font-size: 15px;
}

.stage-strip {
    margin: 30px 0 0;
    border: 1px solid var(--line);
}

.stage-strip img {
    aspect-ratio: 4 / 1;
    max-height: 180px;
    object-position: center 30%;
}

.about-stages {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    margin-top: 30px;
    border-top: 1px solid var(--line);
}

.stage {
    padding: 26px 26px 26px 0;
    border-right: 1px solid var(--line);
    padding-left: 26px;
}

.stage:first-child {
    padding-left: 0;
}

.stage:last-child {
    border-right: 0;
}

.stage .stage-num {
    display: block;
    font-family: var(--mono);
    font-size: 22px;
    letter-spacing: 0.06em;
    color: var(--tech-green);
    margin-bottom: 10px;
}

.stage h3 {
    font-size: 17px;
}

.stage p {
    margin: 0;
    color: var(--text-dim);
    font-size: 14px;
}

.about-open {
    margin-top: 52px;
    padding: 40px 24px;
    text-align: center;
    border: 1px solid var(--line);
    background-color: var(--bg-panel);
}

.about-open p {
    max-width: 640px;
    margin: 0 auto 22px;
    color: var(--text-dim);
}

/* ---------- product ---------- */

.prod-toc {
    margin-top: 26px;
    border: 1px solid var(--line);
    background-color: var(--bg-panel);
}

.prod-toc h2 {
    margin: 0;
    padding: 20px 30px;
    font-size: 18px;
    border-bottom: 1px solid var(--line);
}

.prod-toc ul {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.prod-toc li {
    border-left: 1px solid var(--line);
}

.prod-toc li:first-child {
    border-left: 0;
}

.prod-toc a {
    display: block;
    padding: 20px 24px;
    color: var(--text-main);
}

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

.prod-toc .toc-num {
    display: block;
    font-family: var(--mono);
    font-size: 12px;
    letter-spacing: 0.06em;
    color: var(--tech-green);
    margin-bottom: 6px;
}

.prod-toc .toc-name {
    font-size: 15px;
}

.toc-note {
    padding: 20px 30px 24px;
    border-top: 1px solid var(--line);
}

.toc-note p {
    margin: 0 0 8px;
    font-size: 14px;
    color: var(--text-dim);
}

.toc-note p:last-child {
    margin-bottom: 0;
}

.prod-mods {
    margin-top: 34px;
}

.prod-mod {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
    padding: 48px 0;
    border-top: 1px solid var(--line);
}

.prod-mod::before {
    content: "";
    position: absolute;
    top: -1px;
    left: 0;
    width: 88px;
    height: 2px;
    background-color: var(--tech-green);
}

.prod-mod-alt .mod-body {
    order: 2;
}

.prod-mod-alt .mod-figure {
    order: 1;
}

.mod-num {
    display: block;
    font-family: var(--mono);
    font-size: 22px;
    letter-spacing: 0.06em;
    color: var(--tech-green);
    margin-bottom: 12px;
}

.mod-body h2 {
    font-size: 24px;
}

.mod-body p {
    color: var(--text-dim);
}

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

.mod-list li {
    padding: 12px 0 12px 20px;
    border-bottom: 1px solid var(--line);
    color: var(--text-dim);
    font-size: 14px;
    position: relative;
}

.mod-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 22px;
    width: 8px;
    height: 1px;
    background-color: var(--tech-green);
}

.mod-figure {
    margin: 0;
    border: 1px solid var(--line);
}

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

.mod-figure figcaption {
    padding: 12px 18px;
    font-size: 13px;
    color: var(--text-dim);
    border-top: 1px solid var(--line);
}

/* ---------- news 页 ---------- */

.news-duo {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: stretch;
}

.news-lead-col {
    padding: 32px;
    border: 1px solid var(--line);
    background-color: var(--bg-panel);
}

.news-lead-col p {
    color: var(--text-dim);
}

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

.news-list-col h2 {
    margin-top: 20px;
}

.news-band {
    margin-top: 34px;
    border: 1px solid var(--line);
}

.news-band img {
    aspect-ratio: 6 / 1;
    max-height: 200px;
    object-position: center 40%;
}

.news-band-text {
    padding: 20px 26px;
    border-top: 1px solid var(--line);
}

.news-band-text h2 {
    margin-bottom: 8px;
    font-size: 20px;
}

.news-band-text p {
    margin: 0;
    color: var(--text-dim);
}

.news-observe {
    display: grid;
    grid-template-columns: 260px 1fr 260px;
    gap: 30px;
    align-items: center;
    margin-top: 40px;
}

.news-observe figure {
    margin: 0;
    border: 1px solid var(--line);
}

.news-observe img {
    aspect-ratio: 2 / 3;
    max-height: 340px;
}

.news-observe figure:first-child img {
    object-position: center 30%;
}

.news-observe figure:last-child img {
    object-position: center 70%;
}

.news-observe figcaption {
    padding: 10px 14px;
    font-size: 12px;
    color: var(--text-dim);
    border-top: 1px solid var(--line);
}

/* ---------- contact 页 ---------- */

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-note {
    padding: 24px 0;
    border-bottom: 1px solid var(--line);
}

.contact-note h2 {
    font-size: 18px;
    color: var(--tech-green);
}

.contact-note p {
    margin: 0;
    color: var(--text-dim);
    font-size: 14px;
}

.contact-note:first-of-type {
    border-top: 1px solid var(--line);
}

.contact-figure {
    margin: 26px 0 0;
    border: 1px solid var(--line);
}

.contact-figure img {
    aspect-ratio: 1 / 1;
    max-height: 260px;
    object-position: 40% 60%;
}

.contact-figure figcaption {
    padding: 10px 16px;
    font-size: 12px;
    color: var(--text-dim);
    border-top: 1px solid var(--line);
}

.contact-form {
    padding: 30px;
    border: 1px solid var(--tech-green);
    background-color: var(--bg-deep);
}

.contact-form h2 {
    font-size: 20px;
}

.field {
    margin-bottom: 18px;
}

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

.field input,
.field select,
.field textarea {
    width: 100%;
    padding: 10px 12px;
    font-family: inherit;
    font-size: 14px;
    color: var(--text-main);
    background-color: var(--bg-panel);
    border: 1px solid rgba(47, 191, 113, 0.45);
    border-radius: 0;
}

.field textarea {
    min-height: 104px;
    resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
    outline: 1px solid var(--tech-green);
    outline-offset: 1px;
}

.form-status {
    margin: 16px 0 0;
    font-size: 13px;
    color: var(--text-dim);
}

.faq-band {
    margin-top: 44px;
    border: 1px solid var(--line);
    background-color: var(--bg-panel);
}

.faq-band img {
    aspect-ratio: 16 / 9;
    max-height: 260px;
    object-position: 70% 50%;
    border-bottom: 1px solid var(--line);
}

.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 30px;
    padding: 30px;
}

.qa {
    border-bottom: 1px solid var(--line);
}

.qa summary {
    cursor: pointer;
    padding: 16px 0;
    font-size: 15px;
    color: var(--text-main);
    list-style: none;
}

.qa summary::-webkit-details-marker {
    display: none;
}

.qa summary::before {
    content: "";
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-right: 12px;
    background-color: var(--tech-green);
}

.qa[open] summary {
    color: var(--tech-green);
}

.qa p {
    padding: 0 0 16px 20px;
    margin: 0;
    font-size: 14px;
    color: var(--text-dim);
}

/* ---------- sports 页 ---------- */

.sport-modes {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    margin-top: 28px;
    border: 1px solid var(--line);
}

.sport-mode {
    padding: 30px;
    border-left: 1px solid var(--line);
    border-top: 1px solid var(--line);
    background-color: var(--bg-panel);
}

.sport-mode:nth-child(odd) {
    border-left: 0;
}

.sport-mode:nth-child(-n + 2) {
    border-top: 0;
}

.sport-mode .num {
    display: block;
    font-family: var(--mono);
    font-size: 20px;
    letter-spacing: 0.06em;
    color: var(--tech-green);
    margin-bottom: 10px;
}

.sport-mode h2 {
    font-size: 19px;
}

.sport-mode p {
    margin: 0;
    color: var(--text-dim);
    font-size: 14px;
}

.sport-data {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 36px;
    align-items: start;
}

.sport-panel {
    margin-top: 24px;
    padding: 30px;
    border: 1px solid var(--line);
    background-color: var(--bg-panel);
}

.sport-panel .live-row {
    padding: 12px 0;
}

.sport-figure {
    margin: 0;
    border: 1px solid var(--line);
}

.sport-figure img {
    aspect-ratio: 4 / 3;
    max-height: 300px;
    object-position: left center;
}

.sport-figure figcaption {
    padding: 10px 16px;
    font-size: 12px;
    color: var(--text-dim);
    border-top: 1px solid var(--line);
}

.sport-faq {
    margin-top: 30px;
    border-top: 1px solid var(--line);
}

.sport-faq .qa {
    padding-left: 0;
}

/* ---------- 页脚 ---------- */

.tech-foot {
    border-top: 1px solid var(--line);
    background-color: var(--bg-panel);
    padding-top: 46px;
}

.foot-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.foot-title {
    margin: 0 0 14px;
    font-size: 15px;
    color: var(--text-main);
}

.foot-title::before {
    content: "";
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-right: 10px;
    background-color: var(--tech-green);
}

.foot-col li {
    margin-bottom: 8px;
}

.foot-col a {
    color: var(--text-dim);
    font-size: 14px;
}

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

.foot-note {
    margin-top: 34px;
    padding-top: 18px;
    padding-bottom: 26px;
    border-top: 1px solid var(--line);
    font-size: 13px;
    color: var(--text-dim);
}

.foot-note p {
    margin: 0 0 6px;
}

/* ---------- 滚动进场 ---------- */

.js-on .reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.55s ease, transform 0.55s ease;
}

.js-on .reveal.is-in {
    opacity: 1;
    transform: none;
}

/* ---------- 响应式 ---------- */

@media (max-width: 1024px) {
    .client-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .news-tech-2 {
        grid-template-columns: 1fr 280px;
    }

    .prod-toc ul {
        grid-template-columns: repeat(2, 1fr);
    }

    .prod-toc li:nth-child(3) {
        border-left: 0;
    }

    .prod-toc li:nth-child(n + 3) {
        border-top: 1px solid var(--line);
    }

    .news-observe {
        grid-template-columns: 200px 1fr 200px;
    }
}

@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
    }

    .about-col {
        border-left: 0;
        border-top: 1px solid var(--line);
    }

    .about-col:first-child {
        border-top: 0;
    }

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

    .stage {
        padding-left: 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

    .stage:last-child {
        border-bottom: 0;
    }

    .news-tech-2,
    .news-duo,
    .play-duo,
    .contact-grid,
    .sport-data,
    .prod-mod {
        grid-template-columns: 1fr;
    }

    .prod-mod-alt .mod-body,
    .prod-mod-alt .mod-figure {
        order: 0;
    }

    .news-observe {
        grid-template-columns: 1fr 1fr;
    }

    .news-observe .observe-copy {
        grid-column: 1 / -1;
        order: -1;
    }

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

@media (max-width: 768px) {
    .tech-nav {
        display: none;
    }

    .head-inner {
        position: relative;
    }

    .nav-drawer {
        display: block;
        position: static;
    }

    .nav-drawer ul {
        left: 0;
        right: 0;
        top: 100%;
        width: 100%;
        min-width: 0;
        z-index: 5;
    }

    .sec {
        padding-top: 52px;
        padding-bottom: 52px;
    }

    .tech-num,
    .dl-row {
        grid-template-columns: 64px 1fr;
        gap: 0 14px;
        padding: 24px;
    }

    .svc-row {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .client-4 {
        grid-template-columns: 1fr;
    }

    .sport-modes {
        grid-template-columns: 1fr;
    }

    .sport-mode {
        border-left: 0;
        border-top: 1px solid var(--line);
    }

    .sport-mode:nth-child(-n + 2) {
        border-top: 1px solid var(--line);
    }

    .sport-mode:first-child {
        border-top: 0;
    }

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

@media (max-width: 480px) {
    .head-inner {
        flex-wrap: wrap;
        gap: 8px 12px;
        padding-top: 8px;
        padding-bottom: 8px;
    }

    .brand {
        flex: 1 1 100%;
        font-size: 15px;
    }

    .brand-sub {
        font-size: 11.5px;
    }

    .nav-drawer {
        margin-left: 0;
    }

    .nav-drawer summary {
        white-space: nowrap;
        padding: 6px 12px;
    }

    .tech-entry {
        margin-left: auto;
        padding: 6px 14px;
    }

    .statement-copy {
        padding-left: 16px;
        padding-right: 16px;
    }

    .news-observe {
        grid-template-columns: 1fr;
    }

    .live-board,
    .dl-tech,
    .contact-form,
    .news-lead-col,
    .prod-toc h2 {
        padding: 22px;
    }

    .wrap {
        padding-left: 16px;
        padding-right: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .statement-scan {
        animation: none;
        opacity: 0.5;
    }

    .js-on .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ---------- 基础排版加固 ----------
   Tailwind 的 preflight 在运行时注入，晚于本站样式表，
   这里用更高特异性的元素选择器保证深色正文排版不被覆盖。 */

html body {
    line-height: 1.9;
    font-family: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
}

html p {
    margin: 0 0 14px;
}

html h1,
html h2,
html h3 {
    line-height: 1.4;
}

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

html img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: auto;
    object-fit: cover;
}

html a {
    color: var(--tech-green);
    text-decoration: none;
}