/* 中扑科技官网 · 白光版样式（第三版规范）：瓷白为主，一段深色「大屏」区；大字细体标题、细线分隔，圆角只用在按钮
   颜色只在这里定义；页面里不写死颜色 */
@font-face { font-family: 'ZP Num'; font-weight: 200; font-style: normal; font-display: swap; src: url(fonts/zp-num-200.woff) format('woff'); }
@font-face { font-family: 'ZP Num'; font-weight: 300; font-style: normal; font-display: swap; src: url(fonts/zp-num-300.woff) format('woff'); }
@font-face { font-family: 'ZP Num'; font-weight: 400; font-style: normal; font-display: swap; src: url(fonts/zp-num-400.woff) format('woff'); }
@font-face { font-family: 'ZP Num'; font-weight: 500; font-style: normal; font-display: swap; src: url(fonts/zp-num-500.woff) format('woff'); }

:root {
  --porcelain: #F4F6F5;   /* 页面底：偏冷的瓷白 */
  --paper: #FFFFFF;
  --ink: #0C1613;         /* 墨绿黑：正文与标题 */
  --slate: #5A6662;       /* 次要文字 */
  --faint: #8A9692;
  --hair: #DCE2DF;        /* 细线 */
  --emerald: #0E9F76;     /* 品牌绿（浅底） */
  --glow: #19E6A0;        /* 品牌绿（深底） */
  --night: #07100D;       /* 深色区底 */
  --night-2: #0D1714;
  --night-text: #E9F1EE;
  --night-sub: #93A39D;
  --night-faint: #5F706A;
  --gold: #C9921A;        /* 只用在表盘节点 */
  --f-cn: 'PingFang SC', 'HarmonyOS Sans SC', 'MiSans', 'Source Han Sans SC', 'Noto Sans SC', 'Noto Sans CJK SC', 'Microsoft YaHei UI', 'Microsoft YaHei', sans-serif;
  --f-num: 'ZP Num', 'SF Pro Display', 'Helvetica Neue', Arial, var(--f-cn);
  --wrap: 1240px;
  color-scheme: light;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--porcelain); color: var(--ink); font-family: var(--f-cn); font-size: 16px; line-height: 1.75; font-weight: 400; overflow-x: hidden; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; display: flex; flex-direction: column; min-height: 100vh; }
main { flex: 1 0 auto; }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 60; background: var(--porcelain); }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--emerald); outline-offset: 3px; }
h1, h2, h3, h4, p, ul, ol, dl, dd, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
h1, h2 { text-wrap: balance; font-weight: 300; letter-spacing: -.01em; }
h3 { font-weight: 500; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: max(24px, env(safe-area-inset-left, 0px)); padding-right: max(24px, env(safe-area-inset-right, 0px)); }
.num { font-family: var(--f-num); font-variant-numeric: tabular-nums; }
.nw { white-space: nowrap; }
.skip-link { position: absolute; left: -9999px; top: 0; }
.skip-link:focus { left: 16px; top: 16px; z-index: 200; background: var(--paper); padding: 8px 14px; }

/* ---------- 导航 ---------- */
header.nav { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50; background: rgba(244, 246, 245, .86); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid transparent; transition: border-color .3s; }
header.nav.lined, header.nav.open { border-bottom-color: var(--hair); }
header.nav .bar { display: flex; align-items: center; height: 72px; gap: 32px; }
.brand { display: block; flex: none; height: 30px; }
.brand img { height: 30px; width: auto; }
.links { display: flex; gap: 28px; flex: 1; justify-content: flex-end; font-size: 14px; color: var(--slate); }
.links a { position: relative; padding: 4px 0; white-space: nowrap; }
.links a:hover, .links a[aria-current="page"] { color: var(--ink); }
.links a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1px; background: var(--ink); }
.menu-btn { display: none; margin-left: auto; width: 44px; height: 44px; border: 0; background: none; cursor: pointer; padding: 0; position: relative; }
.menu-btn span { position: absolute; left: 11px; right: 11px; height: 1.5px; background: var(--ink); transition: transform .25s, opacity .25s; }
.menu-btn span:nth-child(1) { top: 16px; } .menu-btn span:nth-child(2) { top: 22px; } .menu-btn span:nth-child(3) { top: 28px; }
header.nav.open .menu-btn span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
header.nav.open .menu-btn span:nth-child(2) { opacity: 0; }
header.nav.open .menu-btn span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.drawer { display: none; }

/* ---------- 按钮与文字链接 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; height: 44px; padding: 0 24px; border-radius: 22px; background: var(--ink); color: var(--paper); font-size: 14px; font-weight: 500; letter-spacing: .04em; white-space: nowrap; cursor: pointer; border: 1px solid var(--ink); transition: background .2s, color .2s, border-color .2s; }
.btn:hover { background: var(--emerald); border-color: var(--emerald); }
.btn.sm { height: 38px; padding: 0 18px; font-size: 13px; }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--hair); }
.btn.ghost:hover { border-color: var(--ink); background: transparent; }
.btn.light { background: transparent; color: var(--paper); border-color: rgba(255, 255, 255, .4); }
.btn.light:hover { background: var(--paper); color: var(--ink); border-color: var(--paper); }
.tlink { font-size: 15px; color: var(--ink); border-bottom: 1px solid var(--ink); padding-bottom: 2px; }
.tlink:hover { color: var(--emerald); border-color: var(--emerald); }
.tlink.light { color: var(--paper); border-color: rgba(255, 255, 255, .5); }
.cta { display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }

/* ---------- 通用标题 ---------- */
.k { font-size: 14px; color: var(--emerald); letter-spacing: .08em; }
.k .num { letter-spacing: .02em; margin-right: .6em; }
.h2 { font-size: clamp(32px, 4vw, 56px); line-height: 1.2; }
.lead { font-size: 18px; color: var(--slate); font-weight: 300; max-width: 32em; }
.shead { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 64px; align-items: end; margin-bottom: 72px; }
.shead p { font-size: 17px; color: var(--slate); font-weight: 300; max-width: 30em; }
.sec { padding-block: 140px; }
.sec + .sec { border-top: 1px solid var(--hair); }
.sec.paper { background: var(--paper); border-block: 1px solid var(--hair); }
.sec.paper + .sec { border-top: 0; }
.sec.tail { padding-block: 0 40px; border-top: 0; }
.caption { font-size: 12px; color: var(--faint); }

/* ---------- 首屏（首页）---------- */
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 64px; align-items: center; padding-block: 96px 120px; }
.hero h1 { font-size: clamp(36px, 5.2vw, 76px); line-height: 1.18; }
.hero h1 span { display: block; white-space: nowrap; }
.hero .k { margin-bottom: 28px; }
.hero .lead { margin-top: 32px; max-width: 30em; }
.hero .cta { margin-top: 44px; gap: 32px; }
.dial { position: relative; width: 100%; max-width: 560px; aspect-ratio: 1; justify-self: end; }
.dial svg { width: 100%; height: 100%; display: block; overflow: visible; }
.dial .face { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; pointer-events: none; }
.dial .lv { font-size: 14px; color: var(--slate); letter-spacing: .08em; }
.dial .t { font-family: var(--f-num); font-weight: 200; font-size: clamp(64px, 9.4vw, 128px); line-height: 1; letter-spacing: -.03em; font-variant-numeric: tabular-nums; margin-top: 10px; }
.dial .bl { margin-top: 14px; font-family: var(--f-num); font-weight: 400; font-size: clamp(17px, 1.8vw, 22px); font-variant-numeric: tabular-nums; }
.dial .nx { margin-top: 18px; font-size: 13px; color: var(--slate); }
.dial .nx b { font-family: var(--f-num); font-weight: 400; color: var(--ink); }
.t.swap, .bl.swap { animation: swap .6s ease; }
@keyframes swap { 0% { opacity: 1; } 40% { opacity: 0; } 100% { opacity: 1; } }

/* ---------- 一句话介绍 ---------- */
.intro-band { border-top: 1px solid var(--hair); }
.intro-band .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: 64px; padding-block: 120px; }
.intro-band h2 { font-size: clamp(30px, 3.6vw, 48px); line-height: 1.3; }
.intro-band p { font-size: 18px; color: var(--slate); font-weight: 300; max-width: 34em; }
.intro-band p + p { margin-top: 20px; }

/* ---------- 深色大屏区 ---------- */
.screen-band { background: var(--night); color: var(--night-text); }
.screen-band .wrap { padding-block: 140px 120px; text-align: center; }
.screen-band .k { color: var(--glow); }
.screen-band h2 { margin-top: 18px; font-size: clamp(34px, 4.6vw, 64px); line-height: 1.2; color: #FFFFFF; }
.screen-band .sub { margin: 24px auto 0; max-width: 32em; font-size: 18px; color: var(--night-sub); font-weight: 300; }
.facts3 { margin: 96px auto 0; max-width: 1080px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 48px; text-align: left; }
.facts3 h3 { font-size: 18px; color: #FFFFFF; }
.facts3 p { margin-top: 10px; font-size: 15px; color: var(--night-sub); font-weight: 300; }
.screen-band .caption { margin-top: 36px; color: var(--night-faint); }

/* ---------- 设备外框：电视 / 手机 / 电脑窗口 ---------- */
.tvset { margin: 80px auto 0; max-width: 1080px; }
.tvset .bezel { padding: 1.1%; border-radius: 14px; background: #121A17; box-shadow: 0 60px 140px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .06); }
.tvset img { width: 100%; height: auto; aspect-ratio: 16 / 9; border-radius: 6px; background: #05070A; }
.tvset .stand { width: 22%; height: 34px; margin: 0 auto; background: linear-gradient(#121A17, #0A110F); clip-path: polygon(30% 0, 70% 0, 100% 100%, 0 100%); }
.tvset.light .bezel { box-shadow: 0 40px 90px rgba(12, 22, 19, .22), 0 0 0 1px rgba(12, 22, 19, .08); }
.tvset.light .stand { background: linear-gradient(#1A2421, #0E1513); }

.phone { position: relative; width: 100%; max-width: 300px; aspect-ratio: 750 / 1564.6; border-radius: 13.5% / 6.47%; background: #0B0F0E; box-shadow: 0 30px 60px rgba(12, 22, 19, .16), 0 0 0 1px rgba(12, 22, 19, .1); }
.phone img { position: absolute; left: 3.4%; top: 1.63%; width: 93.2%; height: 96.74%; object-fit: cover; border-radius: 10.6% / 4.9%; background: var(--paper); }
.phone::after { content: ""; position: absolute; top: 2.7%; left: 50%; width: 24.8%; height: 3.1%; transform: translateX(-50%); border-radius: 999px; background: #0B0F0E; }
.on-night .phone { box-shadow: 0 30px 80px rgba(0, 0, 0, .55), 0 0 0 1px rgba(255, 255, 255, .08); }

.win { width: 100%; border-radius: 10px; overflow: hidden; background: var(--paper); box-shadow: 0 40px 90px rgba(12, 22, 19, .16), 0 0 0 1px rgba(12, 22, 19, .1); }
.win .tb { display: flex; align-items: center; gap: 8px; height: 34px; padding: 0 14px; background: #ECEFEE; border-bottom: 1px solid var(--hair); }
.win .tb i { width: 11px; height: 11px; border-radius: 50%; background: #D3D9D6; }
.win .tb span { flex: 1; text-align: center; font-size: 12px; color: var(--slate); margin-right: 50px; }
.win img { width: 100%; height: auto; aspect-ratio: 1440 / 900; }
.win.crop img { aspect-ratio: 1440 / 720; object-fit: cover; object-position: top; }

/* ---------- 四个端（首页目录） ---------- */
.plist { border-top: 1px solid var(--ink); }
.prow { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1.6fr) minmax(0, 1fr) auto; gap: 40px; align-items: baseline; padding-block: 44px; border-bottom: 1px solid var(--hair); transition: background .3s; }
.prow:hover { background: linear-gradient(90deg, rgba(14, 159, 118, .05), transparent 70%); }
.prow h3 { font-size: clamp(24px, 2.4vw, 32px); font-weight: 400; letter-spacing: .01em; }
.prow h3 small { display: block; font-family: var(--f-num); font-size: 13px; color: var(--emerald); font-weight: 400; letter-spacing: .04em; margin-bottom: 10px; }
.prow .pitch { font-size: 18px; }
.prow .feat { margin-top: 10px; font-size: 14px; color: var(--slate); font-weight: 300; }
.prow .who { font-size: 14px; color: var(--slate); font-weight: 300; }
.prow .who b { display: block; font-weight: 400; color: var(--ink); font-size: 13px; margin-bottom: 4px; }
.prow .go { font-size: 14px; color: var(--ink); white-space: nowrap; border-bottom: 1px solid var(--hair); padding-bottom: 2px; }
.prow .go:hover { color: var(--emerald); border-color: var(--emerald); }

/* ---------- 同一场比赛，几个端同时显示 ---------- */
.sync-stage { display: grid; grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr) minmax(0, 1fr); gap: 36px; align-items: end; }
.sync-stage figure { min-width: 0; }
.sync-stage figcaption, .shot figcaption { margin-top: 18px; font-size: 14px; color: var(--slate); }
.sync-stage figcaption b, .shot figcaption b { display: block; color: var(--ink); font-weight: 500; font-size: 15px; margin-bottom: 2px; }
.sync-stage .phone { max-width: 260px; margin: 0 auto; }

/* ---------- 细节网格 ---------- */
.dgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--hair); }
.ditem { padding: 40px 40px 44px 0; border-bottom: 1px solid var(--hair); min-width: 0; }
.ditem:not(:nth-child(3n+1)) { padding-left: 40px; border-left: 1px solid var(--hair); }
.ditem svg { width: 28px; height: 28px; color: var(--emerald); }
.ditem h3 { margin-top: 24px; font-size: 19px; }
.ditem p { margin-top: 10px; font-size: 15px; color: var(--slate); font-weight: 300; }

/* ---------- 开通流程 ---------- */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.steps li { padding: 36px 36px 40px 0; min-width: 0; }
.steps li + li { padding-left: 36px; border-left: 1px solid var(--hair); }
.steps .n { font-family: var(--f-num); font-weight: 200; font-size: 56px; line-height: 1; color: var(--ink); }
.steps h3 { margin-top: 22px; font-size: 19px; }
.steps p { margin-top: 10px; font-size: 15px; color: var(--slate); font-weight: 300; }

/* ---------- 联系 ---------- */
.contact .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 96px; padding-block: 120px; align-items: end; }
.contact h2 { font-size: clamp(32px, 3.6vw, 48px); line-height: 1.2; }
.contact .lead { margin-top: 24px; }
.contact dl { display: grid; gap: 0; border-top: 1px solid var(--ink); }
.contact dl div { display: grid; grid-template-columns: 7em minmax(0, 1fr); gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--hair); align-items: baseline; }
.contact dt { font-size: 14px; color: var(--slate); }
.contact dd { font-size: 17px; color: var(--ink); min-width: 0; }
.contact dd .big { font-family: var(--f-num); font-size: 28px; font-weight: 300; letter-spacing: .01em; }
.copy { margin-left: 14px; font-size: 13px; color: var(--slate); border: 0; background: none; border-bottom: 1px solid var(--hair); padding: 0 0 1px; cursor: pointer; }
.copy:hover { color: var(--emerald); border-color: var(--emerald); }

/* ---------- 产品页：首屏 ---------- */
.p-hero .wrap { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 56px; align-items: center; padding-block: 88px 112px; }
.p-hero h1 { margin-top: 22px; font-size: clamp(36px, 4.8vw, 68px); line-height: 1.18; }
.p-hero h1 span { display: block; }
.p-hero .lead { margin-top: 28px; }
.p-hero .cta { margin-top: 40px; }
.p-hero .stage { display: flex; justify-content: center; align-items: flex-end; gap: 6%; min-width: 0; }
.p-hero .stage .phone { flex: 0 1 46%; max-width: 280px; }
.p-hero .stage .phone:nth-child(2) { transform: translateY(8%); }
.p-hero.wide .wrap { grid-template-columns: minmax(0, 1fr); gap: 64px; padding-bottom: 96px; }
.p-hero.wide .text { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 64px; align-items: end; }
.p-hero.wide .text .lead { margin-top: 0; }

/* 适合谁 / 包含哪些端：两栏 + 细线表格 */
.kv { border-top: 1px solid var(--ink); }
.kv > div { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2.2fr); gap: 40px; padding: 30px 0; border-bottom: 1px solid var(--hair); align-items: baseline; }
.kv dt { font-size: 19px; font-weight: 500; }
.kv dt small { display: block; font-size: 13px; color: var(--slate); font-weight: 300; margin-top: 4px; }
.kv dd { font-size: 16px; color: var(--slate); font-weight: 300; min-width: 0; }
.kv dd b { color: var(--ink); font-weight: 400; }

/* 功能目录 */
.fgrid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.fgrid li { padding: 26px 32px 28px 0; border-bottom: 1px solid var(--hair); min-width: 0; }
.fgrid li:not(:nth-child(3n+1)) { padding-left: 32px; border-left: 1px solid var(--hair); }
.fgrid h3 { font-size: 17px; }
.fgrid p { margin-top: 6px; font-size: 14px; color: var(--slate); font-weight: 300; }

/* 重点功能：左右交替，大图大字 */
.feature { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr); gap: 80px; align-items: center; }
.feature + .feature { margin-top: 140px; }
.feature.flip .ftext { order: 2; }
.ftext .k { margin-bottom: 18px; }
.ftext h3 { font-size: clamp(26px, 2.8vw, 40px); font-weight: 300; line-height: 1.3; letter-spacing: -.005em; }
.ftext p { margin-top: 22px; font-size: 17px; color: var(--slate); font-weight: 300; max-width: 30em; }
.ftext ul { margin-top: 26px; border-top: 1px solid var(--hair); }
.ftext li { padding: 12px 0 12px 22px; border-bottom: 1px solid var(--hair); font-size: 15px; position: relative; }
.ftext li::before { content: ""; position: absolute; left: 2px; top: 1.15em; width: 8px; height: 1px; background: var(--emerald); }
.fvis { min-width: 0; display: flex; justify-content: center; gap: 5%; align-items: flex-end; }
.fvis .phone { flex: 0 1 44%; max-width: 280px; }
.fvis .phone:nth-child(2) { transform: translateY(7%); }
.fvis.three .phone { flex-basis: 31%; }
.fvis.three .phone:nth-child(2) { transform: translateY(5%); }
.fvis .tvset { margin: 0; width: 100%; }
.fvis .win { flex: 1; }

/* 截图一排（带说明） */
.shots { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 36px 28px; }
.shots.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.shots.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.shot { min-width: 0; }
.shot .phone { margin: 0 auto; max-width: 260px; }
.shot figcaption { max-width: 22em; }
.shots.tvs { gap: 56px 36px; }
.shots.tvs .tvset { margin: 0; }
.shots.tvs .tvset .stand { height: 18px; }
.shots.wins { gap: 64px 40px; }

/* 价格 / 咨询 */
.ask { border-top: 1px solid var(--ink); display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 40px; align-items: center; padding-top: 40px; }
.ask p { font-size: 17px; color: var(--slate); font-weight: 300; max-width: 36em; }
.ask .tel { font-family: var(--f-num); font-weight: 300; font-size: clamp(26px, 3vw, 36px); white-space: nowrap; }

/* 常见问题 */
.faq { border-top: 1px solid var(--ink); }
.faq details { border-bottom: 1px solid var(--hair); }
.faq summary { list-style: none; cursor: pointer; padding: 26px 48px 26px 0; font-size: 18px; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 6px; top: 50%; width: 12px; height: 12px; border-right: 1.5px solid var(--slate); border-bottom: 1.5px solid var(--slate); transform: translateY(-75%) rotate(45deg); transition: transform .25s; }
.faq details[open] summary::after { transform: translateY(-25%) rotate(225deg); }
.faq details p { padding: 0 48px 28px 0; font-size: 16px; color: var(--slate); font-weight: 300; max-width: 46em; }

/* 下一页 */
.next-nav { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); border-top: 1px solid var(--hair); }
.next-nav a { padding: 48px 0; min-width: 0; }
.next-nav .next { grid-column: 2; text-align: right; }
.next-nav .prev + .next { padding-left: 40px; border-left: 1px solid var(--hair); }
.next-nav small { display: block; font-size: 13px; color: var(--slate); }
.next-nav span { display: block; margin-top: 8px; font-size: clamp(22px, 2.4vw, 30px); font-weight: 300; }
.next-nav a:hover span { color: var(--emerald); }

/* ---------- 文档页（关于、隐私） ---------- */
.doc .wrap { padding-block: 96px 120px; }
.doc .head { max-width: 860px; }
.doc h1 { margin-top: 22px; font-size: clamp(36px, 4.4vw, 60px); line-height: 1.2; }
.doc .head .lead { margin-top: 24px; }
.doc .body { margin-top: 72px; max-width: 860px; border-top: 1px solid var(--ink); }
.doc .body section { padding: 40px 0; border-bottom: 1px solid var(--hair); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 2.4fr); gap: 40px; }
.doc .body h2 { font-size: 20px; font-weight: 500; letter-spacing: 0; }
.doc .body p, .doc .body li { font-size: 16px; color: var(--slate); font-weight: 300; }
.doc .body p + p, .doc .body p + ul, .doc .body ul + p { margin-top: 14px; }
.doc .body li { padding-left: 18px; position: relative; }
.doc .body li + li { margin-top: 8px; }
.doc .body li::before { content: ""; position: absolute; left: 0; top: .9em; width: 8px; height: 1px; background: var(--emerald); }
.doc .body b { color: var(--ink); font-weight: 400; }
.doc .meta { margin-top: 28px; font-size: 13px; color: var(--faint); }

/* ---------- 页脚 ---------- */
footer.foot { border-top: 1px solid var(--hair); background: var(--porcelain); }
footer.foot .top { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; padding-block: 40px 28px; }
footer.foot .brand, footer.foot .brand img { height: 26px; }
footer.foot nav { display: flex; gap: 24px; flex-wrap: wrap; font-size: 13px; color: var(--slate); }
footer.foot nav a:hover { color: var(--ink); }
footer.foot .bottom { display: flex; justify-content: space-between; align-items: center; gap: 12px 24px; flex-wrap: wrap; padding-block: 20px 44px; border-top: 1px solid var(--hair); font-size: 13px; color: var(--slate); }
footer.foot .bottom .legal { display: flex; gap: 8px 20px; flex-wrap: wrap; align-items: center; }
footer.foot .bottom a:hover { color: var(--ink); }
footer.foot .bottom .legal a { padding-block: 3px; }
footer.foot .psb { display: inline-flex; align-items: center; gap: 6px; }
footer.foot .psb img { width: 16px; height: 16px; }
footer.foot .motto { color: var(--ink); letter-spacing: .06em; }

/* ---------- 开场：刻度逐格点亮 → Logo 组装 → 缩入导航 ---------- */
#intro { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; background: var(--porcelain); animation: failsafe .5s ease 8s forwards; }
@keyframes failsafe { to { opacity: 0; visibility: hidden; } }
#intro.fade { transition: background-color .7s ease; background-color: rgba(244, 246, 245, 0); }
#intro .lock { width: min(560px, 78vw); height: auto; transform-origin: 0 0; overflow: visible; }
#intro.fly .lock { transition: transform .95s cubic-bezier(.65, 0, .3, 1); }
.lock .tk { opacity: 0; animation: tk .3s ease forwards; animation-delay: calc(var(--i) * 14ms); }
@keyframes tk { to { opacity: 1; } }
.lock .ring, .lock .gold { stroke-dasharray: 1; stroke-dashoffset: 1; }
.lock .ring { animation: draw 1s cubic-bezier(.6, 0, .25, 1) .55s forwards; }
.lock .gold { animation: draw .4s ease-out 1.3s forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.lock .node { opacity: 0; animation: show .4s ease 1.45s forwards; }
.lock .chip { opacity: 0; transform-origin: 60px 60px; animation: chip .8s cubic-bezier(.2, .8, .2, 1) .75s forwards; }
@keyframes chip { from { opacity: 0; transform: scale(.92); } to { opacity: 1; transform: none; } }
.lock .beam { transform-origin: 60px 60px; transform: scaleY(0); animation: beam .7s cubic-bezier(.6, 0, .2, 1) 1s forwards; }
@keyframes beam { to { transform: scaleY(1); } }
.lock .core { opacity: 0; animation: show .5s ease 1.4s forwards; }
.lock .ch { opacity: 0; animation: ch .7s cubic-bezier(.2, .8, .2, 1) forwards; animation-delay: calc(1.15s + var(--i) * 90ms); }
@keyframes ch { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
.lock .en { opacity: 0; animation: show .7s ease 1.6s forwards; }
@keyframes show { to { opacity: 1; } }
.skip { position: absolute; right: max(24px, env(safe-area-inset-right, 0px)); bottom: calc(24px + env(safe-area-inset-bottom, 0px)); border: 0; background: none; color: var(--slate); font-size: 13px; cursor: pointer; padding: 6px 2px; }
.skip:hover { color: var(--ink); }

/* ---------- 看大图 ---------- */
.zoomable { cursor: zoom-in; }
dialog.lightbox { border: 0; padding: 0; background: transparent; max-width: 96vw; max-height: 94vh; overflow: visible; }
dialog.lightbox::backdrop { background: rgba(7, 16, 13, .82); }
dialog.lightbox img { max-width: 96vw; max-height: 86vh; width: auto; height: auto; border-radius: 8px; box-shadow: 0 30px 80px rgba(0, 0, 0, .5); }
dialog.lightbox p { margin-top: 12px; text-align: center; font-size: 14px; color: #C9D6D1; }
dialog.lightbox button { position: fixed; top: max(16px, env(safe-area-inset-top, 0px)); right: max(16px, env(safe-area-inset-right, 0px)); width: 44px; height: 44px; border-radius: 22px; border: 1px solid rgba(255, 255, 255, .3); background: rgba(7, 16, 13, .6); color: #fff; font-size: 22px; line-height: 1; cursor: pointer; }

/* ---------- 下载页 ---------- */
.dl-top .wrap { padding-block: 88px 120px; }
.dl-head { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 64px; align-items: end; }
.dl-head h1 { margin-top: 22px; font-size: clamp(36px, 4.8vw, 68px); line-height: 1.18; }
.dl-head h1 span { display: block; }
.wx-tip { margin-top: 40px; padding: 14px 18px; border: 1px solid var(--emerald); background: var(--paper); font-size: 15px; }
.wx-tip[hidden] { display: none; }
.dl-grid { margin-top: 72px; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.dl-card { display: flex; flex-direction: column; min-width: 0; padding: 36px 36px 32px 0; scroll-margin-top: 96px; }
.dl-card + .dl-card { padding-left: 36px; border-left: 1px solid var(--hair); }
.dl-ico { width: 40px; height: 40px; fill: none; stroke: var(--emerald); stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.dl-kind { margin-top: 24px; font-size: 13px; color: var(--emerald); letter-spacing: .06em; }
.dl-card h2 { margin-top: 8px; font-size: clamp(24px, 2.2vw, 30px); line-height: 1.3; }
.dl-meta { margin-top: 10px; font-size: 14px; color: var(--slate); }
.dl-req { flex: 1; margin-top: 22px; border-top: 1px solid var(--hair); }
.dl-req li { position: relative; padding: 10px 0 10px 20px; border-bottom: 1px solid var(--hair); font-size: 14px; color: var(--slate); }
.dl-req li::before { content: ""; position: absolute; left: 2px; top: 1.35em; width: 8px; height: 1px; background: var(--emerald); }
.dl-act { margin-top: 28px; display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.dl-sha { margin-top: 22px; font-size: 13px; color: var(--slate); }
.dl-sha summary { display: inline-block; list-style: none; cursor: pointer; border-bottom: 1px solid var(--hair); padding-bottom: 1px; }
.dl-sha summary::-webkit-details-marker { display: none; }
.dl-sha summary:hover { color: var(--ink); border-color: var(--ink); }
.shabox { margin-top: 10px; display: flex; align-items: flex-start; gap: 12px; }
.shabox code { flex: 1; min-width: 0; padding: 8px 10px; background: var(--paper); border: 1px solid var(--hair); font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace; font-size: 12px; line-height: 1.6; color: var(--ink); word-break: break-all; }
.shabox .copy { flex: none; margin: 7px 0 0; }
.shabox.cmd { margin-top: 12px; }
.dl-split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 72px; align-items: start; }
.dl-copy .k { margin-bottom: 18px; }
.dl-copy .h3x { margin-bottom: 32px; }
.h3x { font-size: clamp(26px, 2.8vw, 40px); font-weight: 300; line-height: 1.3; }
.dl-vis { min-width: 0; }
.dl-vis .tvset { margin: 0; }
.dl-notes { margin-top: 36px; border-top: 1px solid var(--hair); }
.dl-notes li { display: grid; grid-template-columns: 6.5em minmax(0, 1fr); gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--hair); font-size: 14px; color: var(--slate); }
.dl-notes b { color: var(--ink); font-weight: 500; }
.dl-os { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 72px; }
.dl-os .os { min-width: 0; }
.dl-os h3 { margin-bottom: 18px; font-size: 22px; font-weight: 400; }
.more-line { margin-top: 36px; font-size: 15px; color: var(--slate); }
.more-line .tlink { margin-left: 10px; }
.dl-mini { margin-top: 16px; font-size: 13px; color: var(--slate); }

/* 竖排编号步骤（下载页） */
.isteps { counter-reset: s; border-top: 1px solid var(--ink); }
.isteps > li { position: relative; padding: 22px 0 22px 56px; border-bottom: 1px solid var(--hair); }
.isteps > li::before { counter-increment: s; content: counter(s); position: absolute; left: 0; top: 20px; font-family: var(--f-num); font-weight: 200; font-size: 34px; line-height: 1; color: var(--ink); }
.isteps h3 { font-size: 18px; }
.isteps li p { margin-top: 6px; font-size: 15px; color: var(--slate); font-weight: 300; }
.isteps li .note { margin-top: 10px; color: var(--ink); font-weight: 400; font-size: 14px; }
.isteps.sm > li { padding: 14px 0 14px 40px; }
.isteps.sm > li::before { top: 15px; font-size: 22px; font-weight: 300; color: var(--emerald); }
.isteps.sm li p { margin-top: 0; color: var(--ink); font-weight: 400; }

/* ---------- 使用教程 ---------- */
.g-hero .wrap { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 72px; align-items: end; padding-block: 88px 80px; }
.g-hero h1 { margin-top: 22px; font-size: clamp(36px, 4.8vw, 64px); line-height: 1.18; }
.g-hero h1 span { display: block; }
.g-hero .lead { margin-top: 28px; max-width: 34em; }
.g-meta { margin-top: 18px; font-size: 13px; color: var(--faint); }
.g-jump { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.g-jump a { min-width: 0; padding: 22px 20px 24px 0; border-bottom: 1px solid var(--hair); }
.g-jump a:nth-child(2n) { padding-left: 20px; border-left: 1px solid var(--hair); }
.g-jump .num { display: block; font-size: 13px; color: var(--emerald); }
.g-jump b { display: block; margin-top: 6px; font-size: 19px; font-weight: 500; }
.g-jump small { display: block; margin-top: 4px; font-size: 14px; color: var(--slate); font-weight: 300; }
.g-jump a:hover b { color: var(--emerald); }
.g-chips { display: none; }
.g-layout { display: grid; grid-template-columns: 236px minmax(0, 1fr); gap: 72px; border-top: 1px solid var(--hair); padding-bottom: 120px; }
.g-toc { position: sticky; top: calc(env(safe-area-inset-top, 0px) + 72px); align-self: start; max-height: calc(100vh - 72px - env(safe-area-inset-top, 0px)); overflow-y: auto; padding-block: 48px 32px; font-size: 14px; scrollbar-width: thin; }
.g-toc-h { font-size: 12px; letter-spacing: .14em; color: var(--faint); }
.g-toc > ol { margin-top: 14px; }
.g-toc > ol > li + li { margin-top: 16px; }
.g-toc > ol > li > a { display: block; font-weight: 500; }
.g-toc > ol > li > a .num { margin-right: 10px; font-weight: 400; color: var(--emerald); }
.g-toc > ol > li > a.on { color: var(--emerald); }
.g-toc ol ol { margin-top: 8px; border-left: 1px solid var(--hair); }
.g-toc ol ol a { display: block; margin-left: -1px; padding: 4px 0 4px 14px; border-left: 1px solid transparent; color: var(--slate); line-height: 1.5; }
.g-toc ol ol a:hover { color: var(--ink); }
.g-toc ol ol a.on { color: var(--emerald); border-left-color: var(--emerald); }
.g-main { min-width: 0; }
.g-part { padding-top: 80px; scroll-margin-top: 72px; }
.g-part:first-child { padding-top: 56px; }
.g-part-head { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 6px 28px; align-items: baseline; padding-bottom: 32px; border-bottom: 1px solid var(--ink); }
.g-part-head .pn { grid-row: span 2; font-family: var(--f-num); font-weight: 200; font-size: 64px; line-height: 1; color: var(--emerald); }
.g-part-head h2 { font-size: clamp(30px, 3.4vw, 44px); line-height: 1.2; }
.g-part-head p { font-size: 16px; color: var(--slate); font-weight: 300; max-width: 40em; }
.g-ch { padding-block: 48px; scroll-margin-top: 72px; }
.g-ch + .g-ch { border-top: 1px solid var(--hair); }
.g-ch h3 { display: flex; gap: 14px; align-items: baseline; font-size: 22px; line-height: 1.4; }
.g-ch h3 .num { flex: none; min-width: 2.6em; font-size: 16px; font-weight: 400; color: var(--emerald); }
.g-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 48px; align-items: start; margin-top: 24px; }
.g-row.n0, .g-row.n3, .g-row.n4 { grid-template-columns: minmax(0, 1fr); gap: 36px; }
.g-text { min-width: 0; max-width: 40em; }
.g-text h4 { margin-top: 26px; margin-bottom: 4px; font-size: 13px; font-weight: 500; letter-spacing: .1em; color: var(--emerald); }
.g-text h4:first-child { margin-top: 0; }
.g-p { font-size: 16px; color: var(--slate); font-weight: 300; margin-bottom: 14px; }
.g-steps { counter-reset: s; }
.g-steps > li { position: relative; padding: 11px 0 11px 36px; border-bottom: 1px solid var(--hair); font-size: 16px; line-height: 1.7; }
.g-steps > li:first-child { border-top: 1px solid var(--hair); }
.g-steps > li::before { counter-increment: s; content: counter(s); position: absolute; left: 2px; top: 11px; font-family: var(--f-num); font-size: 17px; font-weight: 400; line-height: 1.6; color: var(--emerald); }
.g-list > li { position: relative; padding: 11px 0 11px 22px; border-bottom: 1px solid var(--hair); font-size: 16px; line-height: 1.7; }
.g-list > li:first-child { border-top: 1px solid var(--hair); }
.g-list > li::before { content: ""; position: absolute; left: 2px; top: 1.55em; width: 8px; height: 1px; background: var(--emerald); }
.g-tip { margin-top: 18px; padding: 14px 18px; background: var(--paper); border-left: 2px solid var(--emerald); font-size: 14px; line-height: 1.7; color: var(--slate); }
.g-text .tlink { font-size: inherit; }
.g-shots { display: flex; gap: 20px; flex-wrap: wrap; align-items: flex-start; }
.gshot { width: 204px; min-width: 0; }
.gshot .phone { max-width: none; }
.gshot figcaption { margin-top: 12px; font-size: 13px; line-height: 1.55; color: var(--slate); }
.g-tv { margin-top: 28px; max-width: 420px; }
.g-tv .tvset { margin: 0; }
.g-tv .tvset .stand { height: 18px; }
.g-win { margin-top: 28px; max-width: 720px; }
.g-faq { margin-top: 8px; }
.g-faq .faq { border-top: 0; }
.g-end { margin-top: 48px; display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }
@media (max-width: 1240px) {
  .g-layout { grid-template-columns: 208px minmax(0, 1fr); gap: 48px; }
  .gshot { width: 184px; }
}
@media (max-width: 1080px) {
  .g-layout { grid-template-columns: minmax(0, 1fr); gap: 0; border-top: 0; }
  .g-toc { display: none; }
  .g-chips { display: block; position: sticky; top: calc(env(safe-area-inset-top, 0px) + 72px); z-index: 40; background: rgba(244, 246, 245, .94); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-block: 1px solid var(--hair); }
  .g-chips .wrap { display: flex; gap: 6px; overflow-x: auto; padding-block: 10px; scrollbar-width: none; }
  .g-chips .wrap::-webkit-scrollbar { display: none; }
  .g-chips a { flex: none; padding: 5px 14px; border: 1px solid var(--hair); border-radius: 999px; font-size: 13px; color: var(--slate); white-space: nowrap; background: var(--paper); }
  .g-chips a.on { background: var(--ink); border-color: var(--ink); color: var(--paper); }
  .g-part, .g-ch { scroll-margin-top: 128px; }
  .g-part:first-child { padding-top: 40px; }
}
@media (max-width: 980px) {
  .g-hero .wrap, .dl-head, .dl-split { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .g-hero .wrap { padding-block: 64px 56px; }
  .dl-top .wrap { padding-block: 64px 88px; }
  .dl-grid { grid-template-columns: minmax(0, 1fr); }
  .dl-card, .dl-card + .dl-card { padding: 32px 0; border-left: 0; }
  .dl-card + .dl-card { border-top: 1px solid var(--hair); }
  .dl-req { flex: none; }
  .dl-os { grid-template-columns: minmax(0, 1fr); gap: 48px; }
}
@media (max-width: 900px) {
  .g-row.n2 { grid-template-columns: minmax(0, 1fr); gap: 32px; }
}
@media (max-width: 760px) {
  .g-row { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .g-shots { gap: 24px 16px; }
  .gshot { width: calc(50% - 8px); max-width: 230px; }
  .g-row.n1 .gshot { width: 64%; max-width: 260px; }
  .g-ch { padding-block: 40px; }
  .g-ch h3 { font-size: 20px; }
  .g-part-head .pn { font-size: 48px; }
  .g-part { padding-top: 64px; }
}
@media (max-width: 600px) {
  .g-jump a, .g-jump a:nth-child(2n) { padding: 18px 12px 20px 0; }
  .g-jump a:nth-child(2n) { padding-left: 14px; }
  .g-jump b { font-size: 17px; }
  .g-steps > li, .g-list > li { font-size: 15px; }
  .g-part-head { grid-template-columns: minmax(0, 1fr); }
  .g-part-head .pn { grid-row: auto; font-size: 40px; }
  .isteps > li { padding-left: 44px; }
  .isteps > li::before { font-size: 28px; }
  .dl-notes li { grid-template-columns: minmax(0, 1fr); gap: 2px; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .links { gap: 20px; }
  .links a.opt { display: none; }
}
@media (max-width: 980px) {
  .links, header.nav .bar > .btn { display: none; }
  .menu-btn { display: block; }
  .drawer { display: block; overflow: hidden; max-height: 0; transition: max-height .35s ease; }
  header.nav.open .drawer { max-height: 80vh; }
  .drawer nav { display: grid; padding: 8px 0 24px; }
  .drawer nav a { padding: 14px 0; border-bottom: 1px solid var(--hair); font-size: 16px; }
  .drawer nav a[aria-current="page"] { color: var(--emerald); }
  .drawer .btn { margin-top: 20px; width: 100%; }
  .hero .wrap, .p-hero .wrap { grid-template-columns: minmax(0, 1fr); gap: 56px; padding-block: 64px 88px; }
  .dial { justify-self: center; max-width: 440px; }
  .intro-band .wrap, .shead, .contact .wrap, .p-hero.wide .text { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .shead { margin-bottom: 56px; }
  .prow { grid-template-columns: minmax(0, 1fr); gap: 10px; padding-block: 34px; }
  .prow .go { justify-self: start; margin-top: 6px; }
  .dgrid, .fgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ditem, .ditem:not(:nth-child(3n+1)), .fgrid li, .fgrid li:not(:nth-child(3n+1)) { padding: 32px 24px 32px 0; border-left: 0; }
  .ditem:nth-child(2n), .fgrid li:nth-child(2n) { padding-left: 24px; border-left: 1px solid var(--hair); }
  .facts3 { grid-template-columns: minmax(0, 1fr); gap: 32px; max-width: 520px; }
  .feature, .feature.flip { grid-template-columns: minmax(0, 1fr); gap: 48px; }
  .feature.flip .ftext { order: 0; }
  .feature + .feature { margin-top: 112px; }
  .sync-stage { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .sync-stage figure:first-child { grid-column: 1 / -1; }
  .shots { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .shots.c3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps { grid-template-columns: minmax(0, 1fr); }
  .steps li, .steps li + li { padding: 30px 0; border-left: 0; border-bottom: 1px solid var(--hair); }
  .kv > div { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .doc .body section { grid-template-columns: minmax(0, 1fr); gap: 14px; }
  .ask { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 600px) {
  .wrap { padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }
  .sec { padding-block: 88px; }
  .intro-band .wrap, .contact .wrap { padding-block: 88px; }
  .screen-band .wrap { padding-block: 96px 88px; }
  .hero h1 span { white-space: normal; }
  .tvset { margin-top: 56px; }
  .dgrid, .fgrid { grid-template-columns: minmax(0, 1fr); }
  .ditem, .ditem:nth-child(2n), .ditem:not(:nth-child(3n+1)), .fgrid li, .fgrid li:nth-child(2n), .fgrid li:not(:nth-child(3n+1)) { padding: 26px 0; border-left: 0; }
  .shots, .shots.c3 { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px 16px; }
  .shots.c2, .shots.tvs, .shots.wins { grid-template-columns: minmax(0, 1fr); }
  .shot figcaption { font-size: 13px; }
  .sync-stage { gap: 28px 16px; }
  .next-nav { grid-template-columns: minmax(0, 1fr); }
  .next-nav .next { grid-column: auto; text-align: left; }
  .next-nav .prev + .next { padding-left: 0; border-left: 0; border-top: 1px solid var(--hair); }
  .contact dl div { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  footer.foot .bottom { flex-direction: column; align-items: flex-start; }
  footer.foot nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 20px; width: 100%; font-size: 14px; }
  footer.foot nav a { padding-block: 13px; border-bottom: 1px solid var(--hair); }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-delay: 0s !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}