/* ============================================================================
   展示站样式 —— “机柜面板”语法：一条条机架单元带状分区，左侧贴标签带
   色：粉末涂层钢灰 / 深海军墨 / 钴蓝（品牌）/ LED 绿（只用来表示“在线”）
   字：Archivo（拉丁）+ Noto Sans SC（中文）+ Martian Mono（标签与数据）
   ============================================================================ */
:root {
  --ground: #e9edf1; --panel: #f3f5f8; --card: #ffffff;
  --ink: #0b1a2b; --ink-2: #435567; --ink-3: #66778a;
  --line: #cdd5de; --line-2: #aeb9c5;
  --accent-base: #1f4fff; --accent: var(--accent-base); --on-accent: #ffffff;
  --console-bg: #0b1a2b; --console-ink: #e8eef5; --console-ink-2: #9fb0c2; --console-ink-3: #7d90a5;
  --console-line: #25384d; --console-line-2: #35506b; --console-accent: #86a3ff;
  --led-ok: #16b364; --led-off: #c3ccd6;
  /* 软件界面示意：软件本身只有浅色界面，所以这一组不随主题变 */
  --m-bg: #f7f8fa; --m-card: #ffffff; --m-line: #e3e6ea; --m-ink: #24292f; --m-ink-2: #57606a;
  --m-accent: #0969da; --m-accent-soft: #e7f0ff; --m-ok: #1a7f37; --m-ok-soft: #e6f6ec;
  --font-sans: "Archivo", "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "Martian Mono", ui-monospace, "SF Mono", Menlo, Consolas, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --ground: #0a121b; --panel: #0e1823; --card: #121d29;
    --ink: #e8eef5; --ink-2: #a3b2c2; --ink-3: #7d8fa2;
    --line: #223142; --line-2: #34495f;
    --accent: #7c9bff; --on-accent: #06101c;
    --console-bg: #060c13; --console-line: #1d2c3d; --console-line-2: #2c425a;
    --led-off: #2a3a4c; color-scheme: dark;
  }
}
@supports (color: color-mix(in srgb, red, blue)) {
  @media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) { --accent: color-mix(in srgb, var(--accent-base) 52%, #ffffff); }
  }
}
:root[data-theme="dark"] {
  --ground: #0a121b; --panel: #0e1823; --card: #121d29;
  --ink: #e8eef5; --ink-2: #a3b2c2; --ink-3: #7d8fa2;
  --line: #223142; --line-2: #34495f;
  --accent: #7c9bff; --on-accent: #06101c;
  --console-bg: #060c13; --console-line: #1d2c3d; --console-line-2: #2c425a;
  --led-off: #2a3a4c; color-scheme: dark;
}
@supports (color: color-mix(in srgb, red, blue)) {
  :root[data-theme="dark"] { --accent: color-mix(in srgb, var(--accent-base) 52%, #ffffff); }
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 400 1rem/1.7 var(--font-sans); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
html:lang(en) body { line-height: 1.6; }
img, video, svg { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
button { font: inherit; color: inherit; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.wrap { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 clamp(20px, 4vw, 48px); }
.skip { position: absolute; left: 12px; top: -64px; z-index: 100; background: var(--ink); color: var(--ground); padding: 8px 14px; border-radius: 3px; text-decoration: none; }
.skip:focus { top: 12px; }

/* ---------- 标签带（机架上的路由标签）---------- */
.tape { display: inline-block; font: 500 .72rem/1 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink); background: var(--card); border: 1px solid var(--line-2); padding: .6em .85em; border-radius: 2px; box-shadow: 0 1px 0 var(--line); }

/* ---------- 按钮 ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .5em; min-height: 48px; padding: .7em 1.4em; font: 600 .95rem/1 var(--font-sans); letter-spacing: .01em; color: var(--ink); background: transparent; border: 1px solid var(--ink); border-radius: 3px; text-decoration: none; cursor: pointer; transition: background-color .15s, color .15s, border-color .15s, filter .15s; }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn--primary:hover { filter: brightness(.9); }
.btn--ghost:hover { background: var(--ink); color: var(--ground); }
.btn--onhl { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.btn--sm { min-height: 36px; padding: .5em 1.05em; font-size: .85rem; }

/* ---------- 顶栏 ---------- */
.bar { position: sticky; top: 0; z-index: 50; background: var(--ground); border-bottom: 1px solid var(--line); }
.bar__in { display: flex; align-items: center; gap: 24px; height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 700; letter-spacing: .01em; white-space: nowrap; }
.brand__logo { height: 28px; width: auto; }
.bar__nav { display: flex; gap: 4px; margin-left: auto; }
.bar__nav a { padding: 8px 12px; font-size: .92rem; font-weight: 500; color: var(--ink-2); text-decoration: none; border-radius: 3px; }
.bar__nav a:hover { color: var(--ink); background: var(--line); }
.bar__tools { display: flex; align-items: center; gap: 10px; }
.lang { font: 500 .74rem/1 var(--font-mono); letter-spacing: .04em; padding: .65em .8em; border: 1px solid var(--line-2); border-radius: 3px; text-decoration: none; color: var(--ink-2); }
.lang:hover { color: var(--ink); border-color: var(--ink); }
.icon-btn { display: grid; place-items: center; width: 36px; height: 36px; padding: 0; background: transparent; border: 1px solid var(--line-2); border-radius: 3px; color: var(--ink-2); cursor: pointer; }
.icon-btn:hover { color: var(--ink); border-color: var(--ink); }

/* ---------- 首屏 ---------- */
.hero { padding: clamp(36px, 6vw, 84px) 0 clamp(56px, 8vw, 104px); }
.hero__grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr); gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero h1 { margin: 22px 0 22px; font-size: clamp(2.6rem, 5.2vw, 4.9rem); font-weight: 800; line-height: 1.04; letter-spacing: -.028em; text-wrap: balance; }
html:lang(zh-CN) .hero h1 { font-weight: 700; line-height: 1.14; letter-spacing: -.01em; }
html:lang(en) .hero h1 { font-size: clamp(2.4rem, 4.2vw, 4.3rem); letter-spacing: -.03em; }
.hero__sub { max-width: 34em; font-size: clamp(1rem, 1.3vw, 1.18rem); color: var(--ink-2); }
.hero__cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.badges li { font: 500 .72rem/1 var(--font-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); border: 1px solid var(--line-2); padding: .6em .85em; border-radius: 2px; }
.stats { display: flex; flex-wrap: wrap; gap: 18px clamp(24px, 4vw, 52px); margin: 38px 0 0; padding-top: 26px; border-top: 1px solid var(--line); }
.stats > div { display: flex; flex-direction: column-reverse; gap: 8px; }
.stats dt { font: 500 .7rem/1.3 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.stats dd { margin: 0; font: 800 clamp(1.9rem, 3.2vw, 2.6rem)/1 var(--font-sans); letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.hero { position: relative; isolation: isolate; }
.hero::before { content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none; opacity: .4;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 70% 80% at 72% 30%, #000, transparent 72%); mask-image: radial-gradient(ellipse 70% 80% at 72% 30%, #000, transparent 72%); }
.hero__visual { justify-self: end; width: 100%; max-width: 620px; }
.hero__visual figcaption { margin-top: 12px; font: 400 .74rem/1.5 var(--font-mono); color: var(--ink-3); }
.hero__img { width: 100%; height: auto; border: 1px solid var(--line-2); border-radius: 6px; box-shadow: 0 40px 80px -40px rgba(11, 26, 43, .45); }

/* 软件窗口示意 */
.win { background: var(--m-bg); color: var(--m-ink); border: 1px solid var(--line-2); border-radius: 8px; overflow: hidden; font: 500 12px/1.4 var(--font-sans); box-shadow: 0 40px 80px -40px rgba(11, 26, 43, .5), 0 2px 8px rgba(11, 26, 43, .1); }
.win__bar { display: flex; align-items: center; gap: 10px; padding: 9px 12px; background: #eceff3; border-bottom: 1px solid var(--m-line); }
.win__dots { display: flex; gap: 6px; }
.win__dots i { width: 9px; height: 9px; border-radius: 50%; background: #c9d0d8; }
.win__name { font-weight: 700; color: var(--m-ink-2); letter-spacing: .02em; }
.win__tools { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 12px; background: var(--m-card); border-bottom: 1px solid var(--m-line); }
.win__tools span { padding: 4px 10px; border: 1px solid var(--m-line); border-radius: 5px; color: var(--m-ink-2); font-size: 11.5px; }
.win__tools .is-primary { background: var(--m-accent); border-color: var(--m-accent); color: #fff; }
.win__body { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 14px; padding: 14px; }
.radar { align-self: start; background: var(--m-card); border: 1px solid var(--m-line); border-radius: 6px; padding: 10px; }
.radar__head, .radar__foot { display: flex; justify-content: space-between; font: 500 10px/1.4 var(--font-mono); color: var(--m-ink-2); }
.radar__head b { font-weight: 500; color: var(--m-accent); }
.radar__grid { display: grid; grid-template-columns: repeat(16, 1fr); gap: 2px; margin: 9px 0; }
.radar__grid i { aspect-ratio: 1; background: #eef1f4; border-radius: 1px; transition: background-color .18s; }
.radar__grid i.edge { background: repeating-linear-gradient(45deg, #e1e6eb 0 2px, #f3f5f7 2px 4px); }
.radar__grid i.seen { background: #dbe3ec; }
.radar.is-done .radar__grid i:not(.edge) { background: #dbe3ec; }
.radar__grid i.cursor { background: #8dbbf1; }
.radar__grid i.hit, .radar.is-done .radar__grid i.hit { background: var(--m-accent); }
.rcards { display: grid; gap: 8px; align-content: start; min-width: 0; }
.rc { display: grid; grid-template-columns: minmax(0, 1fr) auto; grid-template-areas: "id badge" "ch open"; gap: 7px 10px; align-items: center; background: var(--m-card); border: 1px solid var(--m-line); border-left: 3px solid var(--m-ok); border-radius: 0 6px 6px 0; padding: 8px 10px; transition: opacity .45s, transform .45s; }
.rc--wan { border-left-color: var(--m-accent); }
.rc.is-dim { opacity: .55; transform: translateY(3px); }
.rc__id { grid-area: id; display: flex; flex-direction: column; min-width: 0; }
.rc__id b { display: inline-flex; align-items: center; gap: 5px; font-size: 12.5px; color: var(--m-ink); }
.rc__star { color: #d4a72c; }
.rc__id i { font: 400 10px/1.4 var(--font-mono); font-style: normal; color: var(--m-ink-2); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rc__badge { grid-area: badge; justify-self: end; font-size: 10.5px; padding: 1px 8px; border-radius: 999px; background: var(--m-ok-soft); color: var(--m-ok); border: 1px solid #b7e0c4; white-space: nowrap; }
.rc--wan .rc__badge { background: var(--m-accent-soft); color: var(--m-accent); border-color: #b6d4fe; }
.rc__ch { grid-area: ch; display: flex; gap: 6px; flex-wrap: wrap; }
.ch { font: 500 10px/1.5 var(--font-mono); padding: 0 6px; border-radius: 3px; background: #f0f2f5; color: #8b949e; }
.ch--ok { background: var(--m-ok-soft); color: var(--m-ok); }
.rc__open { grid-area: open; justify-self: end; font-size: 10.5px; color: #fff; background: var(--m-accent); padding: 2px 9px; border-radius: 5px; white-space: nowrap; }

/* ---------- 机架单元 ---------- */
.unit { border-top: 1px solid var(--line); padding: clamp(56px, 8vw, 104px) 0; scroll-margin-top: 60px; }
.unit__grid { display: grid; grid-template-columns: minmax(120px, 176px) minmax(0, 1fr); gap: 0 clamp(24px, 4vw, 64px); }
.unit__rail { position: sticky; top: 84px; align-self: start; }
.unit__body { display: flex; flex-direction: column; gap: clamp(28px, 4vw, 52px); min-width: 0; }
.unit__head { display: flex; flex-direction: column; gap: 14px; }
.unit__title { max-width: 22em; font-size: clamp(1.8rem, 3.3vw, 2.7rem); font-weight: 700; line-height: 1.16; letter-spacing: -.015em; text-wrap: balance; }
.unit__intro { max-width: 38em; font-size: 1.05rem; color: var(--ink-2); }
.unit__intro p + p { margin-top: .7em; }

/* 深色“控制台”单元：局部改写色板，里面的东西自动跟着变 */
.unit--console {
  --ink: var(--console-ink); --ink-2: var(--console-ink-2); --ink-3: var(--console-ink-3);
  --line: var(--console-line); --line-2: var(--console-line-2); --card: #0f2236; --accent: var(--console-accent);
  --on-accent: #06101c; --ground: var(--console-bg);
  background: var(--console-bg); color: var(--console-ink); border-top: 0;
}
.unit--console .tape { background: transparent; box-shadow: none; }

/* 痛点：LED 熄灭 → 点亮 */
.pains { border-bottom: 1px solid var(--line); }
.pain { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 4vw, 56px); padding: 24px 0; border-top: 1px solid var(--line); }
.pain p { display: flex; flex-direction: column; gap: 10px; font-size: 1.02rem; }
.pain__before { color: var(--ink-3); }
.pain__after { font-weight: 500; }
.pain__k { display: inline-flex; align-items: center; gap: 9px; font: 500 .7rem/1 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; }
.led { flex: none; width: 8px; height: 8px; border-radius: 50%; background: var(--led-off); }
.led--on { background: var(--led-ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--led-ok) 26%, transparent); }

/* 功能：规格行 */
.specs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(32px, 5vw, 72px); border-bottom: 1px solid var(--line); }
.spec { display: grid; grid-template-columns: 5.4rem minmax(0, 1fr); gap: 16px; padding: 22px 0 26px; border-top: 1px solid var(--line); }
.spec__tag { padding-top: .35em; font: 500 .7rem/1.5 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
.spec h3 { font-size: 1.12rem; font-weight: 700; line-height: 1.35; }
.spec p { margin-top: 6px; font-size: .97rem; color: var(--ink-2); }

/* 功能全景：模块卡片。每张卡 = 一块机架模块，顶上一小段主色边 */
.mods { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.mod { position: relative; display: flex; flex-direction: column; gap: 12px; min-width: 0; padding: 30px 30px 28px; background: var(--card); border: 1px solid var(--line); border-radius: 4px; }
.mod::before { content: ""; position: absolute; left: -1px; top: -1px; width: 56px; height: 3px; background: var(--accent); }
.mod--wide { grid-column: 1 / -1; }
.mod__tag { font: 500 .7rem/1 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--accent); }
.mod h3 { font-size: 1.3rem; font-weight: 700; line-height: 1.3; letter-spacing: -.005em; }
.mod__text { font-size: .97rem; color: var(--ink-2); }
.mod__list { display: grid; gap: 10px; margin-top: 6px; padding-top: 18px; border-top: 1px solid var(--line); font-size: .95rem; }
.mod--wide .mod__list { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(28px, 4vw, 56px); }
.mod__list li { position: relative; padding-left: 20px; }
.mod__list li::before { content: ""; position: absolute; left: 1px; top: .62em; width: 7px; height: 7px; border-radius: 1px; background: var(--accent); opacity: .85; }

/* 视频 */
.player { position: relative; aspect-ratio: 16 / 9; background: #02060b; border: 1px solid var(--line-2); border-radius: 4px; overflow: hidden; }
.player__video, .player iframe, .vlite { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.player__video { object-fit: contain; background: #02060b; }
.player__cap { font: 400 .8rem/1.6 var(--font-mono); color: var(--ink-3); }
.player--hero { box-shadow: 0 40px 80px -40px rgba(11, 26, 43, .5); }
.vlite { display: grid; place-items: center; background: #050b12; }
.vlite > img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .86; }
.vlite__btn { position: relative; width: 78px; height: 78px; padding: 0; border-radius: 50%; border: 1.5px solid rgba(255, 255, 255, .85); background: rgba(8, 16, 26, .55); cursor: pointer; transition: transform .15s, background-color .15s; }
.vlite__btn:hover { transform: scale(1.06); background: rgba(31, 79, 255, .75); }
.vlite__btn span { position: absolute; left: 50%; top: 50%; transform: translate(-36%, -50%); border-left: 22px solid #fff; border-top: 14px solid transparent; border-bottom: 14px solid transparent; }
.vlite__link { position: absolute; left: 14px; bottom: 12px; font: 500 .72rem/1 var(--font-mono); color: rgba(255, 255, 255, .78); text-decoration: none; padding: .5em .7em; background: rgba(5, 11, 18, .6); border-radius: 2px; }
.vlite__link:hover { color: #fff; }

/* 截图 */
.shots { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 28px 24px; }
.shot__img { display: block; width: 100%; padding: 0; background: var(--card); border: 1px solid var(--line-2); border-radius: 4px; overflow: hidden; cursor: zoom-in; }
.shot__img img { width: 100%; height: auto; }
.shot__cap { margin-top: 10px; font: 400 .78rem/1.6 var(--font-mono); color: var(--ink-3); }

/* 适合谁 */
.who { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(32px, 5vw, 72px); border-bottom: 1px solid var(--line); }
.who__item { padding: 22px 0 28px; border-top: 1px solid var(--line); }
.who h3 { font-size: 1.15rem; font-weight: 700; line-height: 1.4; }
.who p { margin-top: 6px; color: var(--ink-2); }

/* 步骤：一根线缆穿过四个端口 */
.steps { position: relative; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: clamp(20px, 3vw, 40px); }
.steps::before { content: ""; position: absolute; left: 0; right: 0; top: 22px; border-top: 1.5px dashed var(--line-2); }
.step { position: relative; }
.step__n { position: relative; display: grid; place-items: center; width: 44px; height: 44px; background: var(--ground); border: 1.5px solid var(--ink); border-radius: 3px; font: 500 1rem/1 var(--font-mono); }
.step h3 { margin-top: 18px; font-size: 1.08rem; font-weight: 700; line-height: 1.4; }
.step p { margin-top: 6px; font-size: .96rem; color: var(--ink-2); }

/* 方案 */
.plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.plan { display: flex; flex-direction: column; align-items: flex-start; gap: 16px; padding: 28px; background: var(--card); border: 1px solid var(--line); border-radius: 4px; }
.plan--hl { background: var(--ink); color: var(--ground); border-color: var(--ink); }
.plan__name { font: 500 .76rem/1.4 var(--font-mono); letter-spacing: .08em; text-transform: uppercase; opacity: .72; }
.plan__price { font-size: clamp(1.7rem, 3vw, 2.3rem); font-weight: 800; line-height: 1.15; letter-spacing: -.01em; }
.plan__list { display: flex; flex-direction: column; gap: 8px; flex: 1; font-size: .96rem; }
.plan__list li { position: relative; padding-left: 22px; }
.plan__list li::before { content: ""; position: absolute; left: 2px; top: .5em; width: 9px; height: 5px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }
.plans__note { font: 400 .8rem/1.6 var(--font-mono); color: var(--ink-3); }

/* 问答 */
.faq { border-bottom: 1px solid var(--line); }
.qa { border-top: 1px solid var(--line); }
.qa summary { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; padding: 20px 0; font-size: 1.08rem; font-weight: 600; line-height: 1.5; cursor: pointer; list-style: none; }
.qa summary::-webkit-details-marker { display: none; }
.qa summary::after { content: "+"; flex: none; font: 400 1.5rem/1 var(--font-mono); color: var(--ink-3); }
.qa[open] summary::after { content: "–"; color: var(--accent); }
.qa__a { max-width: 44em; padding: 0 0 24px; color: var(--ink-2); }
.qa__a p + p { margin-top: .8em; }

/* 自由文字 */
.textblock { display: grid; grid-template-columns: minmax(0, 1fr); gap: 36px; align-items: start; }
.textblock:has(.textblock__img) { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); }
.textblock.is-left .textblock__img { order: -1; }
.textblock__copy { display: flex; flex-direction: column; gap: 20px; }
.textblock__body { max-width: 40em; font-size: 1.05rem; color: var(--ink-2); }
.textblock__body p + p { margin-top: .9em; }
.textblock__img { width: 100%; height: auto; border: 1px solid var(--line-2); border-radius: 4px; }

/* 联系 */
.unit--contact { padding: clamp(64px, 10vw, 128px) 0; }
.unit--contact .unit__title { font-size: clamp(2rem, 4.6vw, 3.7rem); line-height: 1.1; }
.contacts { border-bottom: 1px solid var(--line); }
.crow { display: grid; grid-template-columns: 9rem minmax(0, 1fr) auto; gap: 6px 24px; align-items: center; padding: 22px 0; border-top: 1px solid var(--line); }
.crow__k { font: 500 .74rem/1.4 var(--font-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.crow__v { font-size: clamp(1.15rem, 2.2vw, 1.65rem); font-weight: 600; line-height: 1.3; overflow-wrap: anywhere; }
.crow__v a { text-decoration: none; border-bottom: 1.5px solid var(--accent); }
.crow__v a:hover { color: var(--accent); }
.crow__act { display: flex; align-items: center; gap: 10px; }
.crow__note { grid-column: 2 / -1; font-size: .92rem; color: var(--ink-2); }
.chip { padding: .6em 1em; font: 500 .74rem/1 var(--font-mono); background: transparent; border: 1px solid var(--line-2); border-radius: 2px; cursor: pointer; transition: color .15s, border-color .15s; }
.chip:hover { color: var(--accent); border-color: var(--accent); }
.qr { width: 56px; height: 56px; padding: 3px; background: #fff; border: 0; border-radius: 3px; cursor: zoom-in; }
.qr img { width: 100%; height: 100%; object-fit: contain; }
.contacts__hours { font: 400 .82rem/1.6 var(--font-mono); color: var(--ink-3); }

/* 页脚 */
.foot { padding: 28px 0 44px; border-top: 1px solid var(--line); font-size: .86rem; color: var(--ink-3); }
.foot__in { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 10px 28px; }
.foot__brand { font-weight: 700; color: var(--ink); }
.foot__brand span { margin-left: 8px; font: 400 .8rem var(--font-mono); color: var(--ink-3); }
.foot__links { display: flex; gap: 18px; }
.foot__links a { text-decoration: none; }
.foot__links a:hover { color: var(--ink); text-decoration: underline; }

/* 大图 */
.lightbox { max-width: min(94vw, 1200px); max-height: 92vh; padding: 0; background: transparent; border: 0; overflow: visible; }
.lightbox::backdrop { background: rgba(5, 10, 16, .88); }
.lightbox img { max-width: 100%; max-height: 86vh; margin: 0 auto; background: #fff; border-radius: 4px; }
.lightbox__x { position: absolute; top: -46px; right: 0; padding: .55em 1em; font: 500 .8rem/1 var(--font-mono); color: #fff; background: transparent; border: 1px solid rgba(255, 255, 255, .5); border-radius: 3px; cursor: pointer; }

.nf { display: flex; flex-direction: column; align-items: flex-start; gap: 20px; max-width: 640px; margin: 18vh auto 0; padding: 0 24px; }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero__grid { grid-template-columns: 1fr; }
  .hero__visual { justify-self: stretch; max-width: 680px; }
  .unit__grid { grid-template-columns: 1fr; gap: 22px; }
  .unit__rail { position: static; }
  .specs, .who { grid-template-columns: 1fr; }
  .mods { grid-template-columns: 1fr; }
  .textblock:has(.textblock__img) { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 28px; }
  .steps::before { left: 22px; right: auto; top: 0; bottom: 0; border-top: 0; border-left: 1.5px dashed var(--line-2); }
  .step { padding-left: 68px; }
  .step__n { position: absolute; left: 0; top: 0; }
  .step h3 { margin-top: 0; padding-top: 8px; }
}
@media (max-width: 720px) {
  .bar__nav { display: none; }
  .bar__tools { margin-left: auto; }
  .bar__in { gap: 12px; }
  .pain { grid-template-columns: 1fr; gap: 16px; }
  .win__body { grid-template-columns: 1fr; }
  .mod { padding: 24px 22px 22px; }
  .mod--wide .mod__list { grid-template-columns: 1fr; }
  .radar__grid { max-width: 230px; margin-left: auto; margin-right: auto; }
  .crow { grid-template-columns: minmax(0, 1fr) auto; }
  .crow__k { grid-column: 1 / -1; }
  .crow__note { grid-column: 1 / -1; }
  .spec { grid-template-columns: 1fr; gap: 6px; }
}
@media (max-width: 420px) {
  .brand__text { max-width: 9.5em; overflow: hidden; text-overflow: ellipsis; }
  .lang { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}