/* ============================================================
   asia-neon-terminal — site.css
   设计系统：午夜蓝霓虹比赛终端
   底色 #070d1f / 电光青 #22d3ee / 辉光紫 #a855f7
   意象：HUD 直角框、数据条、玻璃拟态卡、扫描线、状态 ticker
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
    --bg-deep: #070d1f;
    --bg-panel: #0b1530;
    --bg-panel-2: #0e1a3a;
    --neon: #22d3ee;
    --glow: #a855f7;
    --text-main: #d9e6ff;
    --text-dim: #8fa3c8;
    --line-soft: rgba(34, 211, 238, 0.28);
    --line-dim: rgba(139, 162, 202, 0.18);
    --glass-a: rgba(13, 27, 56, 0.88);
    --glass-b: rgba(11, 21, 48, 0.6);
    --shadow-neon: 0 0 18px rgba(34, 211, 238, 0.35);
    --shadow-purple: 0 0 18px rgba(168, 85, 247, 0.3);
    --shell-w: 1180px;
}

/* ---------- 基础 ---------- */
html,
body {
    background: var(--bg-deep);
    color: var(--text-main);
    overflow-x: hidden;
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.75;
    /* 微弱扫描线纹理，只在浅色文字处透出，不遮挡正文 */
    background-image: repeating-linear-gradient(
        0deg,
        rgba(34, 211, 238, 0.035) 0px,
        rgba(34, 211, 238, 0.035) 1px,
        transparent 1px,
        transparent 5px
    );
}

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

img {
    display: block;
    max-width: 100%;
}

.shell {
    width: 100%;
    max-width: var(--shell-w);
    margin: 0 auto;
    padding-left: 1rem;
    padding-right: 1rem;
}

/* ---------- 页头与导航 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid var(--line-dim);
    background: rgba(7, 13, 31, 0.92);
    transition: box-shadow 0.25s ease;
}

.site-header.is-scrolled {
    box-shadow: 0 6px 24px rgba(2, 6, 18, 0.6);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    min-height: 64px;
}

.brand-short {
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 0.02em;
    color: var(--neon);
    text-shadow: 0 0 12px rgba(34, 211, 238, 0.4);
}

.brand-short span {
    color: var(--text-main);
    font-weight: 500;
    margin-left: 0.4rem;
    font-size: 1rem;
}

.site-nav {
    display: flex;
    gap: 0.35rem;
    align-items: center;
}

.nav-link {
    display: inline-block;
    padding: 0.55rem 0.9rem;
    border-radius: 6px;
    color: var(--text-dim);
    font-size: 0.95rem;
    border: 1px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
    color: var(--text-main);
    border-color: var(--line-soft);
}

.nav-link.is-current {
    color: var(--neon);
    border-color: var(--line-soft);
    box-shadow: inset 0 -2px 0 var(--neon);
}

.btn-capsule {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    padding: 0.55rem 1.2rem;
    border-radius: 999px;
    border: 1px solid var(--line-soft);
    color: var(--neon);
    font-weight: 600;
    transition: background 0.2s ease, box-shadow 0.2s ease;
}

.btn-capsule:hover {
    background: rgba(34, 211, 238, 0.12);
    box-shadow: var(--shadow-neon);
}

.nav-toggle {
    display: none;
    align-items: center;
    gap: 0.4rem;
    min-height: 44px;
    padding: 0.5rem 0.9rem;
    border-radius: 8px;
    border: 1px solid var(--line-soft);
    background: transparent;
    color: var(--text-main);
    font-size: 0.95rem;
    cursor: pointer;
}

/* 移动抽屉：默认收起，JS 控制 open 类 */
.mobile-nav {
    display: none;
    padding: 0.4rem 1rem 1rem;
    flex-direction: column;
    gap: 0.3rem;
}

/* ---------- 主按钮体系 ---------- */
.btn-neon,
.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0.7rem 1.6rem;
    border-radius: 10px;
    font-weight: 700;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-neon {
    background: linear-gradient(120deg, var(--neon), #38bdf8 45%, var(--glow));
    color: #05101f;
    box-shadow: var(--shadow-neon);
}

.btn-neon:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-neon), var(--shadow-purple);
}

.btn-ghost {
    border: 1px solid var(--line-soft);
    color: var(--neon);
    background: transparent;
}

.btn-ghost:hover {
    background: rgba(34, 211, 238, 0.1);
}

/* ---------- Hero：全宽背景 + HUD ---------- */
.hero {
    position: relative;
    display: flex;
    flex-direction: column;
    min-height: 560px;
    border-bottom: 1px solid var(--line-soft);
    overflow: hidden;
}

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

.hero-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    /* 冷色压暗，让文字浮在画面上 */
    filter: brightness(0.55) saturate(0.85) hue-rotate(-6deg);
}

/* 遮罩 + HUD 顶部信号条 */
.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(7, 13, 31, 0.55) 0%,
        rgba(7, 13, 31, 0.2) 40%,
        rgba(7, 13, 31, 0.92) 100%
    );
}

.hero::after {
    content: "SYS·LIVE";
    position: absolute;
    top: 14px;
    left: 16px;
    color: rgba(34, 211, 238, 0.7);
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.72rem;
    letter-spacing: 0.3em;
}

.hero-content {
    position: relative;
    z-index: 2;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 1.25rem 2.5rem;
}

.hero-chip {
    display: inline-block;
    padding: 0.3rem 0.9rem;
    border: 1px solid var(--line-soft);
    border-radius: 999px;
    color: var(--neon);
    background: rgba(34, 211, 238, 0.08);
    font-size: 0.85rem;
    margin-bottom: 1.1rem;
    letter-spacing: 0.05em;
}

.hero-content h2 {
    font-size: clamp(1.9rem, 4.4vw, 3.2rem);
    line-height: 1.25;
    font-weight: 800;
    color: #ffffff;
    text-shadow: 0 0 22px rgba(34, 211, 238, 0.55);
    margin-bottom: 1rem;
}

.hero-sub {
    max-width: 640px;
    color: var(--text-dim);
    font-size: 1.05rem;
    margin-bottom: 0.6rem;
}

.hero-note {
    color: rgba(143, 163, 200, 0.75);
    font-size: 0.82rem;
    margin-bottom: 1.6rem;
}

/* CTA 上下排布（Recipe CTA 字段） */
.cta-stack {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    align-items: center;
}

.cta-stack .btn-neon,
.cta-stack .btn-ghost {
    min-width: 220px;
}

/* ---------- ticker 状态滚动条 ---------- */
.ticker {
    position: relative;
    z-index: 2;
    overflow: hidden;
    border-top: 1px solid var(--line-dim);
    background: rgba(7, 13, 31, 0.7);
}

.ticker ul {
    display: flex;
    width: max-content;
    list-style: none;
    margin: 0;
    padding: 0.45rem 0;
    animation: ticker-run 36s linear infinite;
}

.ticker li {
    padding: 0 1.6rem;
    color: var(--text-dim);
    font-size: 0.85rem;
    white-space: nowrap;
    border-right: 1px solid var(--line-dim);
}

@keyframes ticker-run {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(-50%);
    }
}

/* ---------- Hero 玩法标签横滚条 ---------- */
.command-tags {
    position: relative;
    z-index: 2;
    display: flex;
    gap: 0.6rem;
    overflow-x: auto;
    padding: 0.9rem 1.25rem;
    scrollbar-width: none;
    background: rgba(11, 21, 48, 0.55);
    border-top: 1px solid var(--line-dim);
}

.command-tags::-webkit-scrollbar {
    display: none;
}

.command-tags span {
    flex: 0 0 auto;
    padding: 0.35rem 1rem;
    border-radius: 6px;
    border: 1px solid var(--line-soft);
    color: var(--neon);
    background: rgba(34, 211, 238, 0.06);
    font-size: 0.9rem;
    white-space: nowrap;
}

/* ---------- 正文分区块通用 ---------- */
.section-block {
    padding: 2.6rem 1.25rem;
    border-bottom: 1px solid var(--line-dim);
}

.section-head {
    max-width: var(--shell-w);
    margin: 0 auto 1.6rem;
}

.section-head h3 {
    position: relative;
    display: inline-block;
    font-size: 1.45rem;
    color: #ffffff;
    margin-bottom: 0.5rem;
    padding-left: 1rem;
}

/* HUD 分区标题左侧直角光条 */
.section-head h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.35rem;
    bottom: 0.35rem;
    width: 3px;
    background: linear-gradient(180deg, var(--neon), var(--glow));
    box-shadow: var(--shadow-neon);
}

.section-sub {
    color: var(--text-dim);
    font-size: 0.95rem;
    max-width: 720px;
}

.sample-tag {
    margin-left: 0.6rem;
    padding: 0.15rem 0.6rem;
    font-size: 0.75rem;
    border-radius: 4px;
    color: var(--glow);
    border: 1px solid rgba(168, 85, 247, 0.45);
    vertical-align: middle;
}

.micro-note {
    color: rgba(143, 163, 200, 0.8);
    font-size: 0.8rem;
    margin-top: 0.8rem;
}

/* ---------- databar 数据条 ---------- */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    max-width: var(--shell-w);
    margin: 0 auto 0.4rem;
}

.stat {
    border: 1px solid var(--line-soft);
    background: linear-gradient(160deg, var(--glass-a), var(--glass-b));
    padding: 1rem 1.1rem;
    text-align: center;
}

.stat dd {
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 2rem;
    font-weight: 700;
    color: var(--neon);
    text-shadow: var(--shadow-neon);
    margin: 0 0 0.2rem;
    font-variant-numeric: tabular-nums;
}

.stat dt {
    color: var(--text-dim);
    font-size: 0.85rem;
    letter-spacing: 0.08em;
}

/* ---------- gateways 入口卡 ---------- */
.gate-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    max-width: var(--shell-w);
    margin: 0 auto;
}

.gate-card {
    position: relative;
    border: 1px solid var(--line-soft);
    background: linear-gradient(160deg, var(--glass-a), var(--glass-b));
    padding: 1.6rem 1.4rem 1.4rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* HUD 直角装饰角 */
.gate-card::before,
.gate-card::after {
    content: "";
    position: absolute;
    width: 16px;
    height: 16px;
}

.gate-card::before {
    top: -1px;
    left: -1px;
    border-top: 2px solid var(--neon);
    border-left: 2px solid var(--neon);
}

.gate-card::after {
    right: -1px;
    bottom: -1px;
    border-right: 2px solid var(--glow);
    border-bottom: 2px solid var(--glow);
}

.gate-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-neon);
}

.gate-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    border: 1px solid var(--line-soft);
    color: var(--neon);
    font-size: 1.15rem;
    margin-bottom: 0.9rem;
    box-shadow: inset 0 0 12px rgba(34, 211, 238, 0.15);
}

.gate-card h4 {
    font-size: 1.15rem;
    color: #ffffff;
    margin-bottom: 0.5rem;
}

.gate-card p {
    color: var(--text-dim);
    font-size: 0.93rem;
    margin-bottom: 1rem;
}

.more-link {
    color: var(--neon);
    font-size: 0.9rem;
    font-weight: 600;
}

.more-link i {
    margin-left: 0.4rem;
    font-size: 0.8rem;
}

.more-link:hover {
    text-shadow: var(--shadow-neon);
}

/* ---------- 玻璃卡与图片框 ---------- */
.img-frame {
    position: relative;
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--line-soft);
    background: var(--bg-panel-2);
    aspect-ratio: 16 / 9;
}

.img-frame::after {
    content: "";
    position: absolute;
    inset: 0;
    box-shadow: inset 0 0 0 1px rgba(34, 211, 238, 0.1);
    pointer-events: none;
}

.img-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.card-body h4,
.card-body h3 {
    color: #ffffff;
    font-size: 1.12rem;
    margin-bottom: 0.55rem;
}

.card-body p {
    color: var(--text-dim);
    font-size: 0.95rem;
}

.ui-note {
    display: inline-block;
    margin-top: 0.7rem;
    font-size: 0.78rem;
    color: var(--glow);
}

/* ---------- playbook 双卡与 device 卡 ---------- */
.panel-pair,
.device-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.4rem;
    max-width: var(--shell-w);
    margin: 0 auto;
}

.play-card,
.device-card {
    border: 1px solid var(--line-dim);
    background: linear-gradient(165deg, var(--glass-a), var(--glass-b));
    overflow: hidden;
}

/* 竖幅图：手机场景裁切比例 */
.device-grid .device-card:first-child .img-frame {
    aspect-ratio: 3 / 4;
}

.card-body {
    padding: 1.2rem 1.3rem 1.4rem;
}

.play-card .card-body .more-link,
.device-card .card-body .more-link {
    display: inline-block;
    margin-top: 0.8rem;
}

/* ---------- welfare 任务时间线 ---------- */
.task-timeline {
    position: relative;
    list-style: none;
    margin: 0 auto;
    padding: 0 0 0 1.6rem;
    max-width: var(--shell-w);
    border-left: 1px solid var(--line-soft);
}

.task-timeline li {
    position: relative;
    padding: 0 0 1.6rem 1.2rem;
}

/* 方形节点光点 */
.task-timeline li::before {
    content: "";
    position: absolute;
    left: -1.85rem;
    top: 0.4rem;
    width: 10px;
    height: 10px;
    border: 2px solid var(--neon);
    background: var(--bg-deep);
    box-shadow: var(--shadow-neon);
    transform: rotate(45deg);
}

.task-timeline h4 {
    color: #ffffff;
    font-size: 1.05rem;
    margin-bottom: 0.3rem;
}

.task-timeline p {
    color: var(--text-dim);
    font-size: 0.93rem;
    max-width: 780px;
}

/* ---------- voices 印象卡 ---------- */
.voices-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.2rem;
    max-width: var(--shell-w);
    margin: 0 auto;
}

.note-card {
    border: 1px solid var(--line-dim);
    border-left: 3px solid var(--neon);
    background: linear-gradient(170deg, var(--glass-a), var(--glass-b));
    padding: 1.2rem 1.3rem;
}

.note-tag {
    display: inline-block;
    font-size: 0.78rem;
    color: var(--neon);
    border: 1px solid var(--line-soft);
    padding: 0.1rem 0.6rem;
    border-radius: 999px;
    margin-bottom: 0.6rem;
}

.note-card p {
    color: var(--text-dim);
    font-size: 0.93rem;
}

/* ---------- FAQ 终端式折叠 ---------- */
.faq-list {
    max-width: 860px;
    margin: 0 auto;
}

.faq {
    border: 1px solid var(--line-dim);
    background: linear-gradient(165deg, var(--glass-a), var(--glass-b));
    margin-bottom: 0.8rem;
}

.faq summary {
    list-style: none;
    cursor: pointer;
    padding: 1rem 1.2rem;
    color: #e8f1ff;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

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

/* 折叠图标：方括号 */
.faq summary::before {
    content: "+";
    width: 20px;
    height: 20px;
    flex: 0 0 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line-soft);
    color: var(--neon);
    font-family: "SF Mono", Menlo, Consolas, monospace;
}

.faq[open] summary::before {
    content: "–";
    box-shadow: var(--shadow-neon);
}

.faq-a {
    padding: 0 1.2rem 1.1rem 3.1rem;
    color: var(--text-dim);
    font-size: 0.94rem;
}

.faq-a i {
    color: var(--neon);
    margin-right: 0.5rem;
    font-size: 0.8rem;
}

/* ---------- final-cta 渐变带 ---------- */
.final-cta {
    padding: 0;
}

.cta-band {
    text-align: center;
    padding: 3.4rem 1.25rem;
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.16), rgba(168, 85, 247, 0.14));
    border-top: 1px solid var(--line-soft);
    border-bottom: 1px solid var(--line-dim);
}

.cta-band h3 {
    font-size: 1.6rem;
    color: #ffffff;
    text-shadow: 0 0 16px rgba(34, 211, 238, 0.5);
    margin-bottom: 0.5rem;
}

.cta-band p {
    color: var(--text-dim);
    margin-bottom: 1.4rem;
}

.cta-row {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* ---------- 页脚：深蓝四区（品牌/下载/导航/友链） ---------- */
.site-footer {
    background: #050a18;
    border-top: 1px solid var(--line-soft);
    padding-top: 2.6rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.3fr 1fr 1fr 1.4fr;
    gap: 2rem;
    padding-bottom: 2rem;
}

.footer-brand {
    display: inline-block;
    color: var(--neon);
    font-weight: 700;
    font-size: 1.15rem;
    margin-bottom: 0.7rem;
    text-shadow: 0 0 12px rgba(34, 211, 238, 0.35);
}

.foot-desc {
    color: var(--text-dim);
    font-size: 0.9rem;
    max-width: 300px;
}

.zone-title {
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 0.7rem;
    letter-spacing: 0.05em;
}

.foot-links,
.foot-friends {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 0.35rem;
}

.foot-links a,
.foot-friends a {
    color: var(--text-dim);
    font-size: 0.9rem;
    transition: color 0.2s ease;
}

.foot-links a:hover,
.foot-friends a:hover {
    color: var(--neon);
}

.foot-bar {
    border-top: 1px solid var(--line-dim);
    padding-top: 1.1rem;
    padding-bottom: 1.4rem;
    text-align: center;
}

.foot-bar p {
    color: rgba(143, 163, 200, 0.75);
    font-size: 0.82rem;
}

/* ---------- 内页头部区 ---------- */
.page-head {
    max-width: var(--shell-w);
    margin: 0 auto;
    padding: 3rem 1.25rem 1.2rem;
}

.kicker {
    color: var(--neon);
    font-size: 0.85rem;
    letter-spacing: 0.25em;
    margin-bottom: 0.8rem;
}

.page-head h2 {
    font-size: clamp(1.6rem, 3.4vw, 2.4rem);
    color: #ffffff;
    text-shadow: 0 0 18px rgba(34, 211, 238, 0.4);
    margin-bottom: 0.8rem;
    line-height: 1.3;
}

.lead {
    color: var(--text-dim);
    max-width: 760px;
    font-size: 1rem;
}

/* ---------- 品牌时间轴（about） ---------- */
.brand-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.4fr;
    gap: 2rem;
    max-width: var(--shell-w);
    margin: 0 auto;
    align-items: start;
}

.story-media {
    display: grid;
    gap: 1rem;
}

.brand-timeline {
    list-style: none;
    margin: 0;
    padding: 0 0 0 1.5rem;
    border-left: 1px solid var(--line-soft);
    position: relative;
}

.brand-timeline::before {
    content: "";
    position: absolute;
    left: -2px;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--neon), var(--glow));
    opacity: 0.5;
}

.tl-node {
    position: relative;
    padding: 0 0 1.9rem 1.3rem;
}

.tl-node::before {
    content: "";
    position: absolute;
    left: -1.79rem;
    top: 0.35rem;
    width: 9px;
    height: 9px;
    background: var(--bg-deep);
    border: 2px solid var(--glow);
    transform: rotate(45deg);
    box-shadow: var(--shadow-purple);
}

.tl-node h3 {
    color: #ffffff;
    font-size: 1.12rem;
    margin-bottom: 0.35rem;
}

.tl-node p {
    color: var(--text-dim);
    font-size: 0.94rem;
    max-width: 640px;
}

.vision-note {
    border: 1px solid var(--line-soft);
    background: linear-gradient(160deg, rgba(168, 85, 247, 0.12), rgba(34, 211, 238, 0.08));
    padding: 1.6rem 1.8rem;
    max-width: var(--shell-w);
    margin: 0 auto;
}

.vision-note i {
    color: var(--glow);
    font-size: 1.3rem;
}

.vision-note p {
    color: #e8f1ff;
    font-size: 1.1rem;
    margin: 0.6rem 0 0;
}

.page-cta {
    text-align: center;
}

.page-cta > p {
    color: var(--text-dim);
    margin-bottom: 1.2rem;
}

/* ---------- 目录页 tab（product） ---------- */
.tab-index {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    max-width: var(--shell-w);
    margin: 0 auto 1.6rem;
    padding: 0 1.25rem;
}

.tab-index a {
    padding: 0.5rem 1.2rem;
    border: 1px solid var(--line-soft);
    border-radius: 6px;
    color: var(--text-dim);
    font-size: 0.92rem;
}

.tab-index a:hover {
    color: var(--neon);
    border-color: var(--neon);
}

.tab-block {
    max-width: var(--shell-w);
    margin: 0 auto;
    padding: 1.6rem 1.25rem;
    border-bottom: 1px solid var(--line-dim);
}

.tab-head {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    margin-bottom: 1rem;
}

.tab-icon {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--line-soft);
    color: var(--neon);
    border-radius: 8px;
}

.tab-head h3 {
    color: #ffffff;
    font-size: 1.25rem;
}

.tab-body {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1.4rem;
    align-items: start;
}

.thumb {
    aspect-ratio: 4 / 3;
}

.tab-notes {
    margin: 0;
    padding: 0.2rem 0 0 1.1rem;
    color: var(--text-dim);
    font-size: 0.95rem;
    display: grid;
    gap: 0.6rem;
}

.tab-block .micro-note {
    margin-top: 0.9rem;
}

/* ---------- 资讯流（news） ---------- */
.news-layout {
    display: grid;
    grid-template-columns: 1fr 250px;
    gap: 2rem;
    align-items: start;
}

.news-stream {
    min-width: 0;
}

.news-group h3 {
    color: var(--neon);
    font-size: 1.05rem;
    letter-spacing: 0.1em;
    border-bottom: 1px dashed var(--line-dim);
    padding-bottom: 0.5rem;
    margin: 1.6rem 0 1rem;
}

.news-item {
    position: relative;
    padding: 0 0 1.6rem 1.2rem;
    border-left: 1px solid var(--line-dim);
    margin-left: 0.35rem;
}

/* 时间轴方点 */
.news-item::before {
    content: "";
    position: absolute;
    left: -5px;
    top: 0.45rem;
    width: 9px;
    height: 9px;
    background: var(--bg-deep);
    border: 2px solid var(--neon);
    box-shadow: var(--shadow-neon);
}

.news-item time {
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.8rem;
    color: var(--glow);
    margin-right: 0.6rem;
}

.chip {
    display: inline-block;
    font-size: 0.75rem;
    padding: 0.05rem 0.55rem;
    border-radius: 4px;
    border: 1px solid var(--line-soft);
    color: var(--text-dim);
    vertical-align: middle;
}

.news-item h4 {
    color: #ffffff;
    font-size: 1.05rem;
    margin: 0.5rem 0 0.35rem;
}

.news-item p {
    color: var(--text-dim);
    font-size: 0.93rem;
    max-width: 640px;
}

.thumb-inline {
    max-width: 340px;
    aspect-ratio: 16 / 9;
    margin: 0.7rem 0;
}

.cat-index {
    position: sticky;
    top: 84px;
    border: 1px solid var(--line-dim);
    background: linear-gradient(165deg, var(--glass-a), var(--glass-b));
    padding: 1.2rem 1.3rem;
}

.cat-index ul {
    list-style: none;
    margin: 0 0 1rem;
    padding: 0;
    display: grid;
    gap: 0.5rem;
}

.cat-index a {
    color: var(--text-dim);
    font-size: 0.92rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.cat-index a::before {
    content: "▸";
    color: var(--neon);
    font-size: 0.75rem;
}

.cat-index a:hover {
    color: var(--neon);
}

/* ---------- 支持中心双栏（contact） ---------- */
.support-deck {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 2rem;
    align-items: start;
    max-width: var(--shell-w);
    margin: 0 auto;
}

.deck-col {
    display: grid;
    gap: 1rem;
    align-content: start;
}

.support-card,
.process-card,
.channel-card {
    border: 1px solid var(--line-dim);
    background: linear-gradient(165deg, var(--glass-a), var(--glass-b));
    padding: 1.3rem 1.4rem;
}

.support-card h3 {
    color: #ffffff;
    font-size: 1.05rem;
    margin-bottom: 0.5rem;
}

.support-card h3 i {
    color: var(--neon);
    margin-right: 0.5rem;
}

.support-card p,
.process-card p,
.channel-card li {
    color: var(--text-dim);
    font-size: 0.92rem;
}

.step-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 1.1rem;
}

.step-list li {
    display: flex;
    gap: 0.9rem;
    align-items: flex-start;
}

.step-num {
    flex: 0 0 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--neon);
    color: var(--neon);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: "SF Mono", Menlo, Consolas, monospace;
    font-weight: 700;
    box-shadow: var(--shadow-neon);
}

.step-list h3 {
    color: #ffffff;
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.channel-card {
    display: grid;
    grid-template-columns: 1fr 170px;
    gap: 1.2rem;
    align-items: center;
}

.channel-card .thumb {
    aspect-ratio: 3 / 4;
}

.channel-card ul {
    margin: 0 0 0.8rem;
    padding-left: 1.1rem;
    display: grid;
    gap: 0.4rem;
}

/* ---------- 客户端下载页（app） ---------- */
.dl-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.4rem;
    max-width: var(--shell-w);
    margin: 0 auto;
    align-items: start;
}

.dl-card {
    border: 1px solid var(--line-dim);
    background: linear-gradient(165deg, var(--glass-a), var(--glass-b));
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.dl-card:first-child .img-frame {
    aspect-ratio: 3 / 4;
}

.dl-card .card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.dl-card h3 {
    color: #ffffff;
    font-size: 1.15rem;
    margin-bottom: 0.6rem;
}

.dl-card h3 i {
    color: var(--neon);
    margin-right: 0.5rem;
}

.dl-notes {
    margin: 0 0 1.1rem;
    padding-left: 1.1rem;
    color: var(--text-dim);
    font-size: 0.92rem;
    display: grid;
    gap: 0.4rem;
}

.dl-card .btn-neon,
.dl-card .btn-ghost {
    margin-top: auto;
    width: 100%;
    font-size: 0.92rem;
}

.dl-web {
    border-style: dashed;
}

.hud-web {
    aspect-ratio: 3 / 4;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    text-align: center;
    padding: 1rem;
    background: radial-gradient(circle at 50% 30%, rgba(34, 211, 238, 0.14), transparent 65%);
    border-bottom: 1px solid var(--line-dim);
}

.hud-web i {
    font-size: 2.2rem;
    color: var(--neon);
    text-shadow: var(--shadow-neon);
}

.hud-web p {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.req-list {
    list-style: none;
    margin: 0 auto;
    padding: 0;
    max-width: var(--shell-w);
    border-top: 1px solid var(--line-dim);
}

.req-list li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.8rem 0.2rem;
    border-bottom: 1px solid var(--line-dim);
    color: var(--text-dim);
    font-size: 0.94rem;
}

.req-name {
    color: var(--neon);
    font-weight: 600;
    flex: 0 0 110px;
    font-family: "SF Mono", Menlo, Consolas, monospace;
    letter-spacing: 0.05em;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1020px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

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

    .dl-card:last-child {
        grid-column: 1 / -1;
    }

    .dl-web {
        display: grid;
        grid-template-columns: 200px 1fr;
    }

    .dl-web .hud-web {
        aspect-ratio: auto;
        border-bottom: none;
        border-right: 1px solid var(--line-dim);
    }

    .tab-body {
        grid-template-columns: 240px 1fr;
    }
}

@media (max-width: 820px) {
    .site-nav,
    .header-cta {
        display: none;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .mobile-nav.open {
        display: flex;
    }

    .stat-grid,
    .gate-grid,
    .voices-grid {
        grid-template-columns: 1fr 1fr;
    }

    .panel-pair,
    .device-grid,
    .brand-grid,
    .news-layout,
    .support-deck {
        grid-template-columns: 1fr;
    }

    .news-layout {
        display: block;
    }

    .cat-index {
        position: static;
        margin-top: 1.6rem;
    }

    .channel-card {
        grid-template-columns: 1fr 130px;
    }

    .hero {
        min-height: 520px;
    }
}

@media (max-width: 560px) {
    .header-inner {
        min-height: 56px;
    }

    .brand-short {
        font-size: 1.05rem;
    }

    .brand-short span {
        display: none;
    }

    .hero {
        min-height: 560px;
    }

    .hero-content {
        padding-top: 5rem;
    }

    .hero-content h2 {
        font-size: 1.7rem;
    }

    .cta-stack .btn-neon,
    .cta-stack .btn-ghost {
        min-width: 100%;
        max-width: 300px;
    }

    .stat-grid,
    .gate-grid,
    .voices-grid,
    .dl-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .tab-body {
        grid-template-columns: 1fr;
    }

    .tab-notes {
        padding-left: 0;
    }

    .channel-card {
        grid-template-columns: 1fr;
    }

    .dl-web {
        display: flex;
        flex-direction: column;
    }

    .dl-web .hud-web {
        width: 100%;
        aspect-ratio: 3 / 4;
        border-right: none;
        border-bottom: 1px solid var(--line-dim);
    }

    .req-list li {
        flex-direction: column;
        gap: 0.2rem;
    }

    .news-item {
        padding-left: 0.9rem;
    }

    .foot-bar p {
        padding: 0 0.6rem;
    }
}