/* ============================================================
   虹小轩OA · 官网（对外公开）
   说明：严格遵循《设计契约.md》的 minimal-light 风格，并**优先复用 HongXiaoXuanUI
   现成组件**（.hxx-card / .hxx-btn / .hxx-tag / .hxx-notice / .hxx-tabs-bar …）。
   - 颜色/圆角/阴影/间距/字号一律走 --hxx-* 令牌，禁止自造近似值。
   - 本文件只写「页面级变体」（导航、Hero、栅格、页脚等官网专属骨架），
     控件本体一律用库里的类，不重画。
   ============================================================ */

/* ---------- 基础 ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    background: var(--hxx-bg);
    color: var(--hxx-text);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
/* 库组件多为 display:flex/inline-flex，会盖掉原生 [hidden] 的 display:none，这里统一兜住 */
[hidden] { display: none !important; }

/* 文本选择策略（契约 §8）：界面部件禁选、可读内容可选 */
.s-nav, .s-foot-links, .s-btn-lg, .s-plat, .s-lang { -webkit-user-select: none; user-select: none; }

/* ---------- 布局 ---------- */
.s-wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 24px; }
.s-section { padding: 72px 0; }
.s-section--tight { padding: 48px 0; }

/* ---------- 导航（契约 §9：固定 56px，白底毛玻璃，胶囊链接，active 主色底白字） ---------- */
.s-nav {
    position: fixed; top: 0; left: 0; right: 0;
    height: var(--hxx-nav-height);
    z-index: 10001;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--hxx-border);
    transition: box-shadow var(--hxx-t);
}
.s-nav.is-scrolled { box-shadow: var(--hxx-shadow); }
.s-nav-inner { max-width: 1080px; height: 100%; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 14px; }
.s-brand { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 700; color: var(--hxx-text); }
.s-brand img { width: 30px; height: 30px; border-radius: var(--hxx-radius-sm); }
.s-links { display: flex; align-items: center; gap: 2px; margin-left: 10px; }
.s-link {
    padding: 7px 14px;
    border-radius: var(--hxx-radius-full);
    font-size: 14px;
    font-weight: 500;
    color: var(--hxx-text-2);
    transition: background var(--hxx-t), color var(--hxx-t);
}
.s-link:hover { background: var(--hxx-hover); color: var(--hxx-text); }
.s-link.is-active { background: var(--hxx-primary); color: #fff; font-weight: 600; }
.s-nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }

/* 语言切换：复用库的分段器 .hxx-tabs-bar / .hxx-tab（页面级变体：去掉底部外边距、收窄内距） */
.s-lang.hxx-tabs-bar { margin-bottom: 0; padding: 3px; border-radius: var(--hxx-radius-full); }
.s-lang .hxx-tab { padding: 5px 12px; font-size: 12.5px; font-weight: 600; border-radius: var(--hxx-radius-full); }

/* ---------- Hero ---------- */
.s-hero { padding: calc(var(--hxx-nav-height) + 64px) 0 56px; }
.s-hero-grid { display: grid; grid-template-columns: 0.86fr 1.14fr; gap: 44px; align-items: center; }
/* 页面级变体：官网 Hero 主标题放大到 40px（契约全局 h1 为 26px，官网首页需要更强的首屏层级） */
.s-title { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.2; font-weight: 800; letter-spacing: -0.3px; margin: 0 0 16px; }
.s-title .accent { color: var(--hxx-primary); }
.s-sub { font-size: 16px; color: var(--hxx-text-2); max-width: 520px; margin: 0 0 28px; }
.s-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
/* 页面级变体：首屏主按钮放大到 44px（契约按钮基线 38px） */
.s-btn-lg { min-height: 44px; padding: 0 24px; font-size: 15px; }
.s-btn-lg svg { width: 17px; height: 17px; margin-right: 7px; }
.s-hero-meta { display: flex; flex-wrap: wrap; gap: 26px; margin-top: 30px; }
.s-hero-meta .m { display: flex; align-items: baseline; gap: 7px; }
.s-hero-meta .m b { font-size: 20px; font-weight: 800; color: var(--hxx-text); font-variant-numeric: tabular-nums; }
.s-hero-meta .m span { font-size: 12.5px; color: var(--hxx-text-3); }

/* ---------- 客户端界面示意（高保真复刻真实主界面：左栏 + 会话列 + 聊天区） ----------
   规格取自 HongXiaoXuan_OA_Web/app.html 的真实样式（.side / .conv-item / .chat-* / .bubble），
   按示意尺寸等比压缩；颜色 / 圆角 / 阴影一律走 --hxx-* 令牌。
   仅官网首页与下载页使用；外层 .s-mock3d 提供轻微 3D（透视 + 倾斜 + 层次阴影）。 */
.s-mock { position: relative; }
.s-mock3d { perspective: 1700px; perspective-origin: 62% 38%; }

.appwin {
    position: relative; overflow: hidden;
    border: 1px solid var(--hxx-border); border-radius: 13px;
    background: var(--hxx-surface);
    box-shadow: -26px 34px 70px rgba(16, 24, 40, .16), 0 2px 6px rgba(16, 24, 40, .05);
    text-align: left;
    transform: rotateY(-9deg) rotateX(5deg);
    transition: transform .7s var(--s-ease), box-shadow .7s var(--s-ease);
}
.s-mock3d:hover .appwin { transform: rotateY(-4deg) rotateX(2deg); }
.appwin, .appwin * { box-sizing: border-box; }

/* 自绘标题栏（对齐客户端顶部 32px 拖拽条） */
.appwin-bar { height: 26px; display: flex; align-items: center; gap: 6px; padding: 0 11px; background: var(--hxx-muted); border-bottom: 1px solid var(--hxx-border); }
.appwin-bar .dots { display: flex; gap: 5px; }
.appwin-bar .dots i { width: 8px; height: 8px; border-radius: 50%; background: #d9dce3; }
.appwin-bar .ttl { flex: 1; text-align: center; font-size: 10.5px; color: var(--hxx-text-3); }
.appwin-body { display: flex; height: 336px; }

/* 左栏（.side） */
.appwin .side { width: 104px; flex: none; display: flex; flex-direction: column; background: var(--hxx-surface); border-right: 1px solid var(--hxx-border); }
.appwin .side-profile { display: flex; align-items: center; gap: 7px; padding: 9px 9px 8px; border-bottom: 1px solid var(--hxx-border); }
.appwin .sp-name { font-size: 10.5px; font-weight: 600; line-height: 1.25; }
.appwin .sp-sub { font-size: 8.5px; color: var(--hxx-text-3); }
.appwin .side-menu { flex: 1; padding: 7px; display: flex; flex-direction: column; gap: 1px; }
.appwin .menu-item { position: relative; display: flex; align-items: center; gap: 7px; padding: 7px 8px; border-radius: 8px; font-size: 10.5px; color: var(--hxx-text-2); }
.appwin .menu-item svg { width: 14px; height: 14px; flex: none; }
.appwin .menu-item.active { background: var(--hxx-primary-soft); color: var(--hxx-primary); font-weight: 600; }
.appwin .menu-item.active::before { content: ""; position: absolute; left: 0; top: 50%; width: 2px; height: 12px; border-radius: 0 2px 2px 0; background: var(--hxx-primary); transform: translateY(-50%); }
.appwin .menu-item .bdg { margin-left: auto; }
.appwin .side-foot { padding: 7px; border-top: 1px solid var(--hxx-border); }

/* 会话列（.conv-pane） */
.appwin .conv-pane { width: 170px; flex: none; display: flex; flex-direction: column; background: var(--hxx-surface); border-right: 1px solid var(--hxx-border); }
.appwin .conv-top { padding: 8px; border-bottom: 1px solid var(--hxx-border); }
.appwin .conv-search { height: 24px; display: flex; align-items: center; gap: 5px; padding: 0 8px; border-radius: 6px; background: var(--hxx-muted); border: 1px solid var(--hxx-border); font-size: 10px; color: var(--hxx-text-placeholder); }
.appwin .conv-search svg { width: 11px; height: 11px; }
.appwin .conv-list { flex: 1; padding: 6px; display: flex; flex-direction: column; gap: 1px; overflow: hidden; }
.appwin .conv-item { display: flex; align-items: center; gap: 7px; padding: 7px; border-radius: 8px; }
.appwin .conv-item.active { background: var(--hxx-primary-soft); }
.appwin .ci-body { flex: 1; min-width: 0; }
.appwin .ci-name { font-size: 10.5px; font-weight: 600; color: var(--hxx-text); }
.appwin .ci-last { font-size: 9px; color: var(--hxx-text-3); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.appwin .ci-side { display: flex; flex-direction: column; align-items: flex-end; gap: 3px; flex: none; }
.appwin .ci-time { font-size: 8.5px; color: var(--hxx-text-3); }

/* 聊天区（.chat-pane） */
.appwin .chat-pane { flex: 1; min-width: 0; display: flex; flex-direction: column; background: var(--hxx-surface); }
.appwin .chat-head { display: flex; align-items: center; gap: 7px; padding: 9px 10px; border-bottom: 1px solid var(--hxx-border); }
.appwin .ch-name { font-size: 11.5px; font-weight: 700; color: var(--hxx-text); }
.appwin .ch-sub { font-size: 9px; color: var(--hxx-text-3); }
.appwin .ch-actions { margin-left: auto; display: flex; gap: 7px; color: var(--hxx-text-3); flex: none; }
.appwin .ch-actions svg { width: 13px; height: 13px; }
.appwin .chat-msgs { flex: 1; display: flex; flex-direction: column; gap: 9px; padding: 11px 10px; background: var(--hxx-bg); overflow: hidden; }
.appwin .sys-tip { align-self: center; font-size: 8.5px; color: var(--hxx-text-3); background: var(--hxx-border); border-radius: 4px; padding: 2px 7px; }
.appwin .msg-row { display: flex; gap: 6px; align-items: flex-start; max-width: 88%; }
.appwin .msg-row.mine { align-self: flex-end; flex-direction: row-reverse; }
.appwin .msg-col { display: flex; flex-direction: column; min-width: 0; }
.appwin .msg-row.mine .msg-col { align-items: flex-end; }
.appwin .msg-sender { font-size: 8.5px; color: var(--hxx-text-3); margin: 0 0 3px 2px; }
.appwin .bubble { padding: 6px 9px; border-radius: 10px; font-size: 10.5px; line-height: 1.5; background: var(--hxx-muted); color: var(--hxx-text); word-break: break-word; }
.appwin .msg-row.mine .bubble { background: var(--hxx-primary); color: #fff; }
.appwin .bubble .at { color: var(--hxx-primary); background: var(--hxx-primary-soft); border-radius: 4px; padding: 0 3px; }
.appwin .msg-row.mine .bubble .at { color: #fff; background: rgba(255, 255, 255, .24); }

/* 输入区（.chat-input） */
.appwin .chat-input { border-top: 1px solid var(--hxx-border); padding: 7px 9px 9px; display: flex; flex-direction: column; gap: 6px; }
.appwin .chat-toolbar { display: flex; align-items: center; gap: 6px; color: var(--hxx-text-3); }
.appwin .chat-toolbar svg { width: 13px; height: 13px; }
.appwin .chat-input-row { display: flex; gap: 6px; align-items: flex-end; }
.appwin .chat-editor { flex: 1; min-height: 30px; display: flex; align-items: center; border: 1px solid var(--hxx-border-strong); border-radius: 8px; padding: 0 8px; font-size: 10px; color: var(--hxx-text-placeholder); }
.appwin .chat-send { width: 30px; height: 30px; flex: none; border-radius: 50%; display: grid; place-items: center; background: var(--hxx-primary); color: #fff; }
.appwin .chat-send svg { width: 14px; height: 14px; }

/* 头像：渐变圆 + 首字（不伪造真人照片）。全局类，官网各示意图共用 */
.av { display: grid; place-items: center; border-radius: 50%; flex: none; color: #fff; font-weight: 600; font-size: 9.5px; }
.av-1 { background: linear-gradient(135deg, #7cc0ff, #158aff); }
.av-2 { background: linear-gradient(135deg, #ffd08a, #f0a23c); }
.av-3 { background: linear-gradient(135deg, #a5e6b8, #35b06a); }
.av-4 { background: linear-gradient(135deg, #7fe0d8, #17a2a0); }
.av-5 { background: linear-gradient(135deg, #b9c6d8, #8496ad); }
.appwin .side-profile .av { width: 24px; height: 24px; }
.appwin .conv-item .av { width: 27px; height: 27px; font-size: 10px; }
.appwin .chat-head .av { width: 22px; height: 22px; }
.appwin .msg-row .av { width: 22px; height: 22px; }

/* 悬浮小卡：会议进行中（增强 3D 层次，非 3D 变换） */
.s-float {
    position: absolute; right: -18px; bottom: -46px; z-index: 3;
    display: flex; align-items: center; gap: 10px;
    padding: 11px 13px; border-radius: 12px;
    background: var(--hxx-surface); border: 1px solid var(--hxx-border);
    box-shadow: 0 20px 44px rgba(16, 24, 40, .18);
}
.s-float .badge { width: 32px; height: 32px; border-radius: 9px; display: grid; place-items: center; background: var(--hxx-primary-soft); color: var(--hxx-primary); flex: none; }
.s-float .badge svg { width: 17px; height: 17px; }
.s-float .txt { font-size: 10.5px; color: var(--hxx-text-3); }
.s-float .txt b { display: block; font-size: 12.5px; color: var(--hxx-text); font-weight: 600; }

/* ---------- 信任条 ---------- */
.s-trust { border-top: 1px solid var(--hxx-border); border-bottom: 1px solid var(--hxx-border); background: var(--hxx-surface); }
.s-trust-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px 40px; padding: 20px 24px; }
.s-trust-item { display: flex; align-items: center; gap: 9px; color: var(--hxx-text-3); font-size: 13px; font-weight: 500; }
.s-trust-item svg { width: 18px; height: 18px; color: var(--hxx-text-2); }

/* ---------- 段落标题 ---------- */
.s-head { max-width: 640px; margin-bottom: 36px; }
.s-head.is-center { margin-left: auto; margin-right: auto; text-align: center; }
.s-kicker { display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 1.6px; color: var(--hxx-primary); margin-bottom: 10px; }
.s-h2 { font-size: 24px; font-weight: 800; line-height: 1.3; margin: 0 0 10px; }
.s-lead { font-size: 14.5px; color: var(--hxx-text-2); margin: 0; }

/* ---------- 栅格 ---------- */
.s-grid { display: grid; gap: 16px; }
.s-grid--3 { grid-template-columns: repeat(3, 1fr); }
.s-grid--2 { grid-template-columns: repeat(2, 1fr); }

/* 特色卡（用 .hxx-card，仅补图标块与标签行）
   图标块规格对齐契约 §10.7 信息行图标：36px / 圆角 8 / --hxx-muted 底 / 内 SVG 18px */
.s-ico {
    width: 36px; height: 36px; border-radius: var(--hxx-radius-sm);
    display: grid; place-items: center; margin-bottom: 14px;
    background: var(--hxx-muted); color: var(--hxx-primary);
}
.s-ico svg { width: 18px; height: 18px; }
.s-card h3 { font-size: 16px; font-weight: 600; margin: 0 0 7px; color: var(--hxx-text); }
.s-card p { font-size: 13.5px; color: var(--hxx-text-2); margin: 0; }
.s-card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }

/* ---------- 技术亮点 ---------- */
.s-split { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 44px; align-items: start; }
.s-tech-list { display: grid; gap: 12px; }
.s-tech { display: flex; gap: 14px; }
.s-tech .n {
    flex: none; width: 30px; height: 30px; border-radius: var(--hxx-radius-sm);
    display: grid; place-items: center; background: var(--hxx-primary-soft);
    color: var(--hxx-primary-deep); font-size: 12.5px; font-weight: 700; font-variant-numeric: tabular-nums;
}
.s-tech h4 { font-size: 14.5px; font-weight: 600; margin: 0 0 5px; color: var(--hxx-text); }
.s-tech p { font-size: 13px; color: var(--hxx-text-2); margin: 0; }

/* ---------- 多端支持 ---------- */
.s-plats { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.s-plat { display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center; padding: 22px 12px; }
.s-plat svg { width: 30px; height: 30px; color: var(--hxx-text-2); }
.s-plat .nm { font-size: 14px; font-weight: 600; }
.s-plat .st { font-size: 12px; color: var(--hxx-text-3); }
/* 平台品牌图标：真实彩色 SVG（assets/img/platform/*.svg） */
.plat-ico { width: 30px; height: 30px; object-fit: contain; display: block; }

/* ---------- 安全 ---------- */
.s-sec { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }

/* ---------- CTA ---------- */
.s-cta { text-align: center; background: var(--hxx-primary-soft); border-color: #c5defc; padding: 44px 32px; }
/* 页面级变体：CTA 标题居中，去掉 .hxx-card h2 的左侧主色竖条（居中标题带竖条会失衡） */
.s-cta h2 { font-size: 24px; font-weight: 800; margin: 0 0 10px; padding-left: 0; }
.s-cta h2::before { display: none; }
.s-cta p { color: var(--hxx-text-2); margin: 0 auto 24px; max-width: 520px; }
.s-cta .s-actions { justify-content: center; }

/* ---------- 页脚 ---------- */
.s-footer { border-top: 1px solid var(--hxx-border); background: var(--hxx-surface); padding: 44px 0 28px; }
.s-foot-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 28px; margin-bottom: 30px; }
.s-foot-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; font-weight: 700; font-size: 16px; }
.s-foot-brand img { width: 28px; height: 28px; border-radius: var(--hxx-radius-sm); }
.s-foot-about { font-size: 13px; color: var(--hxx-text-3); max-width: 300px; margin: 0; }
.s-foot-col h5 { font-size: 13px; font-weight: 700; color: var(--hxx-text); margin: 0 0 12px; }
.s-foot-links { display: flex; flex-direction: column; gap: 9px; }
.s-foot-links a { font-size: 13.5px; color: var(--hxx-text-2); transition: color var(--hxx-t); }
.s-foot-links a:hover { color: var(--hxx-primary); }
.s-foot-bottom { display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between; align-items: center; padding-top: 20px; border-top: 1px solid var(--hxx-border); font-size: 12.5px; color: var(--hxx-text-3); }

/* ---------- 下载页 · 居中 Hero（标语 + 主按钮 + 平台磁贴 + 设备示意） ---------- */
.dl-hero { padding: calc(var(--hxx-nav-height) + 76px) 0 20px; text-align: center; }
.dl-title { font-size: clamp(28px, 3.8vw, 46px); font-weight: 800; letter-spacing: -0.5px; line-height: 1.24; margin: 0 0 14px; }
.dl-sub { font-size: 15.5px; color: var(--hxx-text-2); margin: 0 auto 32px; max-width: 580px; }

/* 主下载按钮：中性深色（近黑），不使用品牌彩色 */
.dl-primary {
    display: inline-flex; align-items: center; gap: 10px;
    min-height: 52px; padding: 0 32px;
    border: 1px solid var(--hxx-text); border-radius: var(--hxx-radius-full);
    background: var(--hxx-text); color: #fff;
    font-family: inherit; font-size: 16px; font-weight: 700; letter-spacing: 0.2px;
    cursor: pointer; transition: opacity var(--hxx-t), transform var(--hxx-t);
}
.dl-primary:hover { opacity: .88; }
.dl-primary:active { transform: scale(.98); }
/* 彩色品牌图标 → 白色剪影（深色按钮上可见） */
.dl-primary .btn-ico { width: 20px; height: 20px; filter: brightness(0) invert(1); }
.dl-ver { display: flex; align-items: center; justify-content: center; gap: 7px; margin-top: 14px; font-size: 12.5px; color: var(--hxx-text-3); }
.dl-ver .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--hxx-success); }

/* 平台磁贴行 */
.dl-tiles { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin-top: 30px; }
.dl-tile {
    width: 106px; padding: 16px 8px 13px;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    background: var(--hxx-surface); border: 1px solid var(--hxx-border);
    border-radius: var(--hxx-radius); cursor: pointer;
    font-family: inherit; color: var(--hxx-text);
    transition: box-shadow var(--hxx-t), border-color var(--hxx-t), transform var(--hxx-t);
}
.dl-tile:hover { box-shadow: var(--hxx-shadow-md); border-color: var(--hxx-border-strong); transform: translateY(-2px); }
.dl-tile.is-rec { border-color: var(--hxx-primary); box-shadow: var(--hxx-shadow-md); }
.dl-tile .plat-ico { width: 28px; height: 28px; }
.dl-tile .nm { font-size: 13px; font-weight: 600; }
.dl-tile .tg { font-size: 10.5px; color: var(--hxx-text-3); }

/* 设备示意（笔记本 + 手机，纯 CSS 绘制） */
.dl-devices { position: relative; max-width: 640px; margin: 60px auto 72px; }
.dl-laptop-screen {
    border: 1px solid var(--hxx-border-strong); border-radius: 14px 14px 0 0;
    overflow: hidden; background: var(--hxx-surface);
    box-shadow: var(--hxx-shadow-lg); text-align: left;
}
/* 笔记本屏幕里的界面：去掉独立卡片外壳与 3D（由笔记本边框提供），略降高度 */
.dl-laptop-screen .appwin { border: 0; border-radius: 0; box-shadow: none; transform: none; }
.dl-laptop-screen .appwin-body { height: 292px; }
.dl-laptop-base {
    height: 14px; margin: 0 -26px; position: relative;
    background: var(--hxx-muted); border: 1px solid var(--hxx-border);
    border-top: 0; border-radius: 0 0 14px 14px;
}
.dl-laptop-base::after {
    content: ""; position: absolute; left: 50%; top: 0; transform: translateX(-50%);
    width: 84px; height: 5px; border-radius: 0 0 6px 6px; background: var(--hxx-border-strong);
}
.dl-phone {
    position: absolute; right: -34px; bottom: -38px; width: 152px;
    padding: 7px; border-radius: 24px; background: var(--hxx-text);
    box-shadow: var(--hxx-shadow-lg); text-align: left;
}
.dl-phone-screen { border-radius: 18px; background: var(--hxx-surface); overflow: hidden; height: 216px; display: flex; flex-direction: column; }
.dl-phone-bar { height: 20px; display: grid; place-items: center; }
.dl-phone-bar i { width: 46px; height: 5px; border-radius: 3px; background: var(--hxx-border-strong); }
.dl-phone-head { display: flex; align-items: center; gap: 7px; padding: 7px 10px 9px; border-bottom: 1px solid var(--hxx-border); }
.dl-phone-head .av { width: 22px; height: 22px; }
.dl-phone-head .nm { font-size: 11px; font-weight: 600; color: var(--hxx-text); }
.dl-phone-head .more { margin-left: auto; color: var(--hxx-text-3); }
.dl-phone-head .more svg { width: 13px; height: 13px; display: block; }
.dl-phone-body { flex: 1; padding: 11px; display: flex; flex-direction: column; gap: 8px; }
.dl-phone-body .pb { max-width: 82%; padding: 6px 9px; border-radius: 11px 11px 11px 3px; background: var(--hxx-muted); font-size: 10.5px; line-height: 1.45; color: var(--hxx-text-2); }
.dl-phone-body .pb.me { align-self: flex-end; background: var(--hxx-primary); color: #fff; border-radius: 11px 11px 3px 11px; }
.dl-phone-input { display: flex; align-items: center; gap: 7px; padding: 8px 10px 10px; border-top: 1px solid var(--hxx-border); }
.dl-phone-input .box { flex: 1; height: 26px; border-radius: 13px; background: var(--hxx-muted); border: 1px solid var(--hxx-border); }
.dl-phone-input .send { width: 26px; height: 26px; flex: none; border-radius: 50%; display: grid; place-items: center; background: var(--hxx-primary); color: #fff; }
.dl-phone-input .send svg { width: 13px; height: 13px; }

/* 系统要求（紧凑多列） */
.dl-reqs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; }
.dl-req-card { display: flex; flex-direction: column; gap: 12px; }
.dl-req-card .hd { display: flex; align-items: center; gap: 9px; }
.dl-req-card .hd .plat-ico { width: 22px; height: 22px; }
.dl-req-card .hd .nm { font-size: 14px; font-weight: 600; }
.d-req { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.d-req li { display: flex; gap: 8px; font-size: 12.5px; color: var(--hxx-text-2); }
.d-req li svg { width: 14px; height: 14px; flex: none; margin-top: 3px; color: var(--hxx-text-3); }

/* ---------- 入场动效（契约 §12：卡片 hxx-fade-up translateY(12px)→0 / .35s） ---------- */
[data-reveal] { opacity: 0; transform: translateY(12px); transition: opacity .35s ease, transform .35s ease; }
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .05s; }
[data-reveal][data-delay="2"] { transition-delay: .1s; }
[data-reveal][data-delay="3"] { transition-delay: .15s; }
[data-reveal][data-delay="4"] { transition-delay: .2s; }
[data-reveal][data-delay="5"] { transition-delay: .25s; }

/* ---------- 响应式（契约 §14.2 网页版断点） ---------- */
@media (max-width: 1080px) {
    .s-hero-grid { grid-template-columns: 1fr; gap: 36px; }
    .s-mock { max-width: 520px; margin: 0 auto; width: 100%; }
    .s-split { grid-template-columns: 1fr; gap: 28px; }
    .s-grid--3 { grid-template-columns: repeat(2, 1fr); }
    .s-plats { grid-template-columns: repeat(3, 1fr); }
    .s-sec { grid-template-columns: repeat(2, 1fr); }
    .s-foot-grid { grid-template-columns: 1fr 1fr; }
    .dl-reqs { grid-template-columns: repeat(3, 1fr); }
    .dl-devices { max-width: 520px; }
}
@media (max-width: 768px) {
    .s-links { display: none; }
    .s-section { padding: 48px 0; }
    .s-hero { padding: calc(var(--hxx-nav-height) + 40px) 0 40px; }
    .s-grid--3, .s-grid--2 { grid-template-columns: 1fr; }
    .s-plats { grid-template-columns: repeat(2, 1fr); }
    .s-sec { grid-template-columns: 1fr; }
    .s-foot-grid { grid-template-columns: 1fr; gap: 22px; }
    .s-cta { padding: 32px 20px; }
    .s-wrap, .s-nav-inner { padding: 0 18px; }
    .dl-hero { padding: calc(var(--hxx-nav-height) + 44px) 0 12px; }
    .dl-reqs { grid-template-columns: repeat(2, 1fr); }
    .dl-devices { max-width: 100%; margin-top: 44px; }
    .dl-phone { display: none; }
    .dl-tile { width: 96px; }
}
@media (max-width: 480px) {
    .s-title { font-size: 26px; }
    .s-h2 { font-size: 21px; }
    .s-hero-meta { gap: 16px; }
    .dl-reqs { grid-template-columns: 1fr; }
    .dl-primary { width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    [data-reveal] { opacity: 1; transform: none; transition: none; }
    * { transition-duration: .01ms !important; }
}