@charset "UTF-8"; /* 托管服务器返回的 CSS 不带字符集，声明一下，免得中文和符号被当成别的编码显示成乱码 */
/* ============================================================
   hero.css —— 首屏：没有载入视频时占满工作区
   左边大标题 + 拖放区，右边手机框演示动画，下面三张能力卡片；背景是一块 Canvas 柔光（js/lib/hero-canvas.js）。
   ============================================================ */

.hero { width: min(1280px, calc(100% - 40px)); margin: 0 auto; padding: 28px 0 36px; position: relative; }
/* 背景 Canvas：铺满窗口、在所有内容下面；玻璃透过去能看到流动的光 */
#heroCanvas { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: -1; pointer-events: none; }

.hero-main {
  display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: 40px; align-items: center;
  min-height: min(620px, calc(100vh - 260px));
}
.hero-kicker { margin: 0 0 14px; font-size: 13px; color: var(--muted); letter-spacing: .01em; }
.hero-title {
  margin: 0 0 28px; font-family: "SF Pro Display", var(--font); font-size: clamp(40px, 5.4vw, 64px); line-height: 1.22;
  font-weight: 800; letter-spacing: -.045em;
}
.hero-title mark {
  background: var(--brand); color: var(--on-brand); padding: 0 .16em; border-radius: .16em;
  box-shadow: 0 10px 34px var(--brand-glow);
}
/* 痛点一句：进入首屏时从灰到黑逐字点亮（每个字的 --i 是序号，用来错开 transition-delay） */
.hero-lede { margin: -12px 0 24px; max-width: 36em; text-wrap: balance; font-size: 17px; line-height: 1.6; font-weight: 500; letter-spacing: -.01em; }
.hero-lede > span[aria-hidden] > span { color: var(--line-strong); transition: color .35s var(--ease); }
.hero-lede.lit > span[aria-hidden] > span { color: var(--text); transition-delay: calc(var(--i) * 38ms); }
@media (prefers-reduced-motion: reduce) { .hero-lede > span[aria-hidden] > span { transition: none; } }
.hero-continue { display: inline-flex; align-items: center; gap: 4px; margin-bottom: 14px; max-width: 100%; }
.hero-continue b { font-weight: 600; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 260px; }
.hero-drop { min-height: 250px; max-width: 520px; }
.hero-drop[aria-disabled="true"] { cursor: default; }
.hero-busy { margin: 0; }
.hero-busy b { color: var(--text); font-weight: 600; }

/* ---------- 手机框演示 ----------
   三段：01 只有平台界面的虚线线稿 → 02 扫描线往下扫，扫过的地方显示实际画面 → 03 被挡住的字幕出现斜纹框，问题数跳到 1，最后打勾。
   左边的演示进度和左栏步骤导航是同一种“节点 + 连线”：完成 = 荧光绿实心，进行中 = 荧光绿圈 */
.hero-demo { display: flex; justify-content: center; align-items: center; gap: 30px; }
.hero-readout { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 14px; font-size: 13px; color: var(--muted); }
.hero-readout li { position: relative; display: flex; align-items: center; gap: 8px; transition: color var(--dur-base) var(--ease); }
.hero-readout li > i { width: 12px; height: 12px; border-radius: 50%; flex: none; box-shadow: inset 0 0 0 1.5px var(--line-strong); transition: background var(--dur-base), box-shadow var(--dur-base); }
.hero-readout li[data-stage]:not([data-stage="3"])::after { /* 节点之间的连线 */
  content: ""; position: absolute; left: 5.5px; top: calc(50% + 9px); width: 1px; height: calc(100% + 14px - 18px); background: var(--line-strong); transition: background var(--dur-base);
}
.hero-readout li.on { color: var(--text); font-weight: 500; }
.hero-readout li.on > i { box-shadow: inset 0 0 0 2px var(--brand-ink); }
.hero-readout li.done { color: var(--text); }
.hero-readout li.done > i { background: var(--brand); box-shadow: none; }
.hero-readout li.done::after { background: var(--brand-ink); }
.hero-readout .rd-count { margin-top: 6px; padding-top: 12px; border-top: 1px solid var(--line); align-items: baseline; gap: 10px; }
.hero-readout .rd-count b { font-size: 34px; line-height: 1; font-weight: 600; color: var(--text); }
.hero-phone {
  width: 240px; aspect-ratio: 9 / 19.5; padding: 9px; border-radius: 40px; background: #0b0b0c;
  box-shadow: inset 0 0 0 1.5px rgba(255, 255, 255, .14), 0 30px 80px rgba(0, 0, 0, .28), 0 2px 6px rgba(0, 0, 0, .2);
}
.hp-screen {
  position: relative; width: 100%; height: 100%; border-radius: 32px; overflow: hidden;
  /* 线稿底：深色 + 细网格，像图纸 */
  background:
    linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px) 0 0 / 100% 18px,
    linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px) 0 0 / 18px 100%,
    #0f1012;
}
.hp-real {
  position: absolute; inset: 0;
  background:
    radial-gradient(70% 45% at 50% 38%, rgba(255, 255, 255, .16), transparent 70%),
    linear-gradient(170deg, #3a3a40 0%, #1d1d22 55%, #121215 100%);
}
/* 线稿：各界面区域的虚线框 + 等宽英文标注 */
.hw { position: absolute; border: 1px dashed rgba(255, 255, 255, .42); border-radius: .7em; }
.hw span { position: absolute; left: .5em; top: .35em; font: 500 .8em/1 var(--mono); letter-spacing: .08em; color: rgba(255, 255, 255, .55); }
.hw-top { left: 24%; right: 24%; top: 3%; height: 5%; }
.hw-side { right: 3%; bottom: 13%; width: 4.6em; height: 58%; }
.hw-side span { writing-mode: vertical-rl; }
.hw-caption { left: 4%; right: 26%; bottom: 9%; height: 6.4em; }
.hw-sub { left: 10%; right: 10%; bottom: calc(13% - .2em); height: 2.6em; border-color: rgba(200, 240, 60, .7); }
.hw-sub span { color: rgba(200, 240, 60, .85); }
.hw-nav { left: 0; right: 0; bottom: 0; height: 7%; border-radius: 0 0 32px 32px; }
/* 仿短视频播放页。尺寸都用 em，跟着手机框的字号（.hero-phone 的 font-size）一起缩放 */
.hero-phone { font-size: 10px; }
.hp-screen { color: #fff; }
.hp-screen svg { fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; }
.hp-top { position: absolute; top: 4%; left: 0; right: 0; display: flex; justify-content: center; align-items: center; gap: 1.6em; font-size: 1.3em; color: rgba(255, 255, 255, .62); }
.hp-top .on { color: #fff; font-weight: 700; border-bottom: 2px solid #fff; padding-bottom: .15em; }
.hp-top svg { position: absolute; right: 7%; width: 1.4em; height: 1.4em; color: #fff; }
/* 右侧按钮列：头像、点赞、评论、收藏、分享、音乐唱片 */
.hp-side { position: absolute; right: 3%; bottom: 13%; width: 4.6em; display: flex; flex-direction: column; align-items: center; gap: 1.1em; }
.hp-avatar { position: relative; width: 3.8em; height: 3.8em; border-radius: 50%; border: 2px solid #fff; background: linear-gradient(135deg, #9a9aa2, #55555c); margin-bottom: .5em; }
.hp-avatar i { position: absolute; left: 50%; bottom: -.75em; width: 1.5em; height: 1.5em; margin-left: -.75em; border-radius: 50%; background: #fff; color: #111;
  font: 700 1.2em/1.25em var(--font); font-style: normal; text-align: center; }
.hp-act { display: flex; flex-direction: column; align-items: center; gap: .2em; }
.hp-act svg { width: 2.9em; height: 2.9em; filter: drop-shadow(0 1px 2px rgba(0, 0, 0, .4)); }
.hp-act span { font-size: 1em; font-weight: 600; text-shadow: 0 1px 2px rgba(0, 0, 0, .5); }
.hp-disc { width: 3.4em; height: 3.4em; border-radius: 50%; margin-top: .3em;
  background: radial-gradient(circle, #8a8a92 0 22%, #111 23% 60%, #2a2a2e 61% 100%); box-shadow: 0 0 0 .35em rgba(255, 255, 255, .08); animation: hp-disc 6s linear infinite; }
@keyframes hp-disc { to { transform: rotate(360deg); } }
/* 底部文案：昵称 + 两行文案 + 音乐，文字用灰色横条代替 */
.hp-caption { position: absolute; left: 4%; right: 26%; bottom: 9.5%; display: flex; flex-direction: column; gap: .55em; }
.hp-caption b { font-size: 1.35em; font-weight: 700; }
.hp-caption i, .hp-music i { display: block; height: .75em; border-radius: 1em; background: rgba(255, 255, 255, .55); }
.hp-music { display: flex; align-items: center; gap: .4em; }
.hp-music svg { width: 1.3em; height: 1.3em; flex: none; }
/* 底部导航栏：不透明黑底 */
.hp-nav { position: absolute; left: 0; right: 0; bottom: 0; height: 7%; background: #000; display: flex; justify-content: space-around; align-items: center;
  font-size: 1.15em; color: rgba(255, 255, 255, .6); }
.hp-nav .on { color: #fff; font-weight: 700; }
.hp-plus { width: 2.4em; height: 1.6em; border-radius: .4em; background: #fff; color: #000; font-weight: 800; display: grid; place-items: center; line-height: 1; }
/* 字幕压在两条文案横条和唱片上：演示“会被挡住” */
.hp-sub {
  position: absolute; left: 10%; right: 10%; bottom: 13%; padding: .35em .5em; border-radius: .5em; text-align: center;
  font-size: 1.2em; font-weight: 600; color: #fff; background: rgba(0, 0, 0, .55);
}
.hp-alert { position: absolute; left: 8%; right: 8%; bottom: calc(13% - .45em); height: 3.3em; border-radius: .8em;
  box-shadow: inset 0 0 0 2px #fff, 0 0 0 1px rgba(0, 0, 0, .45);
  background: repeating-linear-gradient(-45deg, rgba(255, 255, 255, .32) 0 4px, rgba(255, 255, 255, .06) 4px 9px); } /* 和画面遮挡里“被挡住”的框一样 */
/* 扫描线 + 上方拖尾（往下扫时拖尾在后面） */
.hp-scan { position: absolute; left: 0; right: 0; top: 0; height: 2px; background: var(--brand); box-shadow: 0 0 12px var(--brand); }
.hp-scan::before { content: ""; position: absolute; left: 0; right: 0; bottom: 2px; height: 60px; background: linear-gradient(transparent, var(--brand-glow)); }
.hp-check { position: absolute; left: 50%; top: 40%; width: 72px; height: 72px; margin: -36px 0 0 -36px; }
.hp-check circle { fill: var(--brand); }
.hp-check polyline { fill: none; stroke: var(--on-brand); stroke-width: 4; stroke-linecap: round; stroke-linejoin: round; }

/* ---------- 能力卡片：等宽编号 + 大数字 ---------- */
.hero-caps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 28px; }
.hero-cap { display: flex; flex-direction: column; gap: 8px; padding: 14px 18px 16px; border-radius: 20px; }
.hero-cap > * { position: relative; z-index: 1; }
.cap-stat { display: flex; align-items: flex-end; gap: 12px; }
.cap-stat b { font-size: clamp(40px, 4.4vw, 56px); line-height: .9; font-weight: 500; letter-spacing: -.05em; }
.cap-stat small { font-size: 12.5px; line-height: 1.4; color: var(--muted); padding-bottom: 2px; }

/* ---------- 首屏下方：功能说明、数据与隐私 ---------- */
.hero-more { display: flex; flex-direction: column; gap: 56px; margin-top: 72px; }
.hm-sec { scroll-margin-top: 96px; } /* 滚动到这一段时，标题不被顶栏挡住 */
.hm-head { max-width: 640px; margin-bottom: 18px; }
.hm-head h2 { margin: 6px 0 6px; font-family: "SF Pro Display", var(--font); font-size: clamp(24px, 2.6vw, 32px); line-height: 1.25; font-weight: 700; letter-spacing: -.03em; }
.hm-head p { margin: 0; color: var(--muted); font-size: 14px; }
.hm-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.hm-card { display: flex; flex-direction: column; gap: 8px; padding: 16px 18px 18px; border-radius: 20px; }
.hm-card > * { position: relative; z-index: 1; }
.hm-card h3 { font-size: 15px; }
.hm-card p { margin: 0; font-size: 13px; line-height: 1.6; color: var(--muted); }
.hm-grid.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }

/* ---------- 怎么用：横向时间线，三步永远并排（窄屏改竖排） ---------- */
.how-steps { list-style: none; margin: 8px 0 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0 28px; }
.how-step { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
/* 编号 + 节点 + 细线：线从节点一直画到下一步的编号前，三段连起来像一条进度线 */
.how-head { display: flex; flex-direction: column; gap: 14px; margin-bottom: 8px; }
.how-head b { font-size: clamp(44px, 5vw, 64px); line-height: .9; font-weight: 400; letter-spacing: -.06em; }
.how-rail { position: relative; display: block; height: 12px; margin-right: -28px; }
.how-rail::before { content: ""; position: absolute; left: 6px; right: 0; top: 50%; height: 1px; background: var(--line-strong); }
.how-step:last-child .how-rail { margin-right: 0; }
.how-step:last-child .how-rail::before { background: linear-gradient(90deg, var(--line-strong), transparent); }
.how-rail i { position: absolute; left: 0; top: 0; width: 12px; height: 12px; border-radius: 50%; background: var(--brand); box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 25%, transparent); }
.how-step h3 { font: 700 20px/1.3 "SF Pro Display", var(--font); letter-spacing: -.02em; }
.how-step > p { margin: 0; max-width: 34ch; font-size: 13.5px; line-height: 1.7; color: var(--muted); }
/* 每步配的一小块真实界面（只是展示，不能点） */
.how-ui { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 8px; pointer-events: none; }
.how-ui > b { font-size: 15px; font-weight: 500; margin-right: 6px; }
.how-drop { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border: 1.5px dashed var(--line-strong); border-radius: 10px; font-size: 12px; color: var(--muted); }
.how-drop svg { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.how-file { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; color: var(--muted); }

/* ---------- 功能介绍：左边大字目录固定，右边四块随滚动经过（参考 Cerebrium / Heron） ---------- */
.feat-scroll { display: grid; grid-template-columns: minmax(0, .85fr) minmax(0, 1.4fr); gap: 56px; align-items: start; }
.feat-nav { position: sticky; top: 130px; display: flex; flex-direction: column; gap: 4px; }
.feat-nav button {
  display: flex; align-items: baseline; gap: 14px; padding: 4px 0; border: 0; background: none; text-align: left; cursor: pointer;
  font: 700 clamp(30px, 3.6vw, 46px)/1.15 "SF Pro Display", var(--font); letter-spacing: -.045em; color: var(--line-strong);
  transition: color var(--dur-base) var(--ease);
}
.feat-nav button .mono-tag { font-size: 12px; color: inherit; }
.feat-nav button:hover { color: var(--subtle); }
.feat-nav button.on { color: var(--text); }
.feat-nav button.on .mono-tag { color: var(--brand-ink); }
.feat-panels { display: flex; flex-direction: column; }
.feat-panel { min-height: 62vh; display: flex; flex-direction: column; justify-content: center; gap: 10px; opacity: .3; transition: opacity var(--dur-emph) var(--ease); }
.feat-panel.on { opacity: 1; }
.feat-panel h3 { font: 700 24px/1.25 "SF Pro Display", var(--font); letter-spacing: -.03em; }
.feat-panel > p { margin: 0; max-width: 52ch; font-size: 14px; line-height: 1.7; color: var(--muted); }
/* 示意图：细线框 + 淡网格底，像图纸 */
.feat-vis {
  position: relative; height: 270px; margin-bottom: 14px; border: 1px solid var(--line-strong); border-radius: 18px; overflow: hidden;
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 24px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 24px 100%,
    var(--surface);
}
.feat-vis .mono-tag { font-size: 10.5px; }
/* 01 技术体检：参数读数，原值 → 修复后 */
.fv-tech { display: flex; flex-direction: column; justify-content: center; padding: 10px 26px; }
.fv-row { display: grid; grid-template-columns: 96px minmax(0, 1fr) 24px minmax(0, 1fr); align-items: center; padding: 13px 0; border-bottom: 1px dashed var(--line-strong); }
.fv-row:last-child { border-bottom: 0; }
.fv-row b { font-size: 15px; font-weight: 500; }
.fv-row i { font-style: normal; color: var(--subtle); }
.fv-row b.ok { justify-self: start; padding: 1px 9px; border-radius: 8px; background: var(--pass-bg); color: var(--pass); }
/* 02 画面遮挡：线稿手机 + 被挡住的字幕 + 建议 */
.fv-occ { display: flex; align-items: center; gap: 26px; padding: 0 26px; }
.fv-phone { position: relative; flex: none; width: 118px; height: 230px; border: 1.5px solid var(--text); border-radius: 20px; }
.fz { position: absolute; border: 1px dashed var(--subtle); border-radius: 6px; }
.fz-side { right: 6px; bottom: 16%; width: 17px; height: 52%; }
.fz-cap { left: 8px; right: 30px; bottom: 9%; height: 17%; }
.fz-nav { left: 0; right: 0; bottom: 0; height: 7%; border-width: 1px 0 0; border-radius: 0; }
.fv-sub {
  position: absolute; left: 12%; right: 12%; bottom: 15%; height: 9%; border: 2px solid var(--text); border-radius: 5px;
  background: repeating-linear-gradient(-45deg, color-mix(in srgb, var(--text) 35%, transparent) 0 3px, transparent 3px 7px);
}
.feat-panel.on .fv-sub { animation: fv-blink 1.6s steps(1) infinite; }
@keyframes fv-blink { 50% { border-color: transparent; } }
.fv-tip { display: flex; flex-direction: column; gap: 6px; padding: 14px 16px; border: 1px solid var(--line-strong); border-radius: 14px; background: var(--glass-strong); }
.fv-tip b { font-size: 14px; }
.fv-tip small { font-size: 12.5px; color: var(--muted); }
/* 03 封面适配：一张图上叠三个比例的裁切框 */
.fv-cover { display: grid; place-items: center; padding: 16px; }
.fv-img { position: relative; width: 100%; height: 100%; border-radius: 10px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--text) 6%, transparent), color-mix(in srgb, var(--text) 18%, transparent)); }
.fv-subject { position: absolute; left: 50%; top: 46%; width: 64px; height: 64px; margin: -32px 0 0 -32px; border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, color-mix(in srgb, var(--text) 30%, transparent), color-mix(in srgb, var(--text) 12%, transparent)); }
.fc { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); border: 1.5px solid var(--text); border-radius: 6px; }
.fc span { position: absolute; left: 6px; top: 4px; color: var(--text); }
.fc-916 { height: 92%; aspect-ratio: 9 / 16; }
.fc-34 { height: 92%; aspect-ratio: 3 / 4; border-style: dashed; border-color: var(--muted); }
.fc-34 span { top: auto; bottom: 4px; color: var(--muted); }
.fc-43 { height: 66%; aspect-ratio: 4 / 3; border-color: var(--subtle); }
.fc-43 span { left: auto; right: 6px; color: var(--subtle); }
/* 04 总报告：按轻重排好的条目 */
.fv-report { display: flex; flex-direction: column; justify-content: center; padding: 10px 26px; }
.fv-item { display: flex; align-items: center; gap: 12px; padding: 14px 0; border-bottom: 1px dashed var(--line-strong); }
.fv-item:last-child { border-bottom: 0; }
.fv-item b { flex: 1; font-size: 14.5px; font-weight: 500; }

/* ---------- 数据与隐私：四行大字 + 说明，滚到的那一行变实、扫过荧光绿高光；三个 0 放在玻璃面板里 ---------- */
.priv-rows { margin: 18px 0 28px; }
.priv-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 40px; align-items: center; padding: 18px 0; border-top: 1px solid var(--line); }
.priv-row:last-child { border-bottom: 1px solid var(--line); }
.priv-word { margin: 0; font: 700 clamp(40px, 6vw, 80px)/1.08 "SF Pro Display", var(--font); letter-spacing: -.045em; color: var(--line-strong); transition: color .5s var(--ease); }
/* 荧光笔：字下方一道品牌色宽线，点亮时从左往右画出来 */
.priv-word span {
  padding: 0 .04em; border-radius: .08em;
  background: linear-gradient(var(--brand), var(--brand)) 0 86% / 0% .3em no-repeat;
  transition: background-size .8s var(--ease) .1s;
}
.priv-row.lit .priv-word { color: var(--text); }
.priv-row.lit .priv-word span { background-size: 100% .3em; }
/* 深色模式：白字压在荧光绿上看不清，改成字下方一道细线 */
:root[data-theme="dark"] .priv-word span { padding-bottom: .1em; background-position: 0 100%; }
:root[data-theme="dark"] .priv-row.lit .priv-word span { background-size: 100% .09em; }
.priv-detail { display: flex; flex-direction: column; gap: 6px; opacity: .35; transform: translateY(6px); transition: opacity .5s var(--ease), transform .5s var(--ease); }
.priv-row.lit .priv-detail { opacity: 1; transform: none; }
.priv-detail .mono-tag { display: inline-flex; align-items: center; gap: 7px; color: var(--brand-ink); }
.priv-detail .mono-tag::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--brand); }
.priv-detail p { margin: 0; max-width: 42ch; font-size: 14px; line-height: 1.7; color: var(--muted); }
.priv-stats { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; padding: 22px 26px; border-radius: 24px; }
.priv-stats > div { position: relative; z-index: 1; display: flex; align-items: center; gap: 14px; }
.priv-stats b { font-size: clamp(48px, 5.5vw, 72px); line-height: 1; font-weight: 500; letter-spacing: -.06em; color: var(--brand-ink); }
.priv-stats b small { margin-left: 3px; font-size: .36em; letter-spacing: 0; }
.priv-stats span { max-width: 11em; font-size: 13px; line-height: 1.45; color: var(--muted); }
@media (prefers-reduced-motion: reduce) {
  .feat-panel, .feat-nav button, .priv-word, .priv-word span, .priv-detail { transition: none; }
  .feat-panel.on .fv-sub { animation: none; }
}

/* ---------- 窄屏：上下堆叠 ---------- */
@media (max-width: 900px) {
  .hero { width: calc(100% - 24px); padding-top: 18px; }
  .hero-main { grid-template-columns: minmax(0, 1fr); gap: 24px; min-height: 0; }
  .hero-drop { max-width: none; min-height: 200px; }
  .hero-phone { width: 160px; border-radius: 30px; padding: 7px; font-size: 6.6px; }
  .hero-demo { gap: 20px; }
  .hero-readout { font-size: 12px; gap: 12px; }
  .hero-readout li[data-stage]:not([data-stage="3"])::after { height: calc(100% + 12px - 18px); }
  .hero-readout .rd-count b { font-size: 26px; }
  .hw-nav { border-radius: 0 0 24px 24px; }
  .hm-grid, .hm-grid.cols-3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .priv-row { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .feat-scroll { grid-template-columns: minmax(0, 1fr); gap: 0; }
  /* 怎么用：改竖排，左边一条竖线串起三个节点（Linea 那样） */
  .how-steps { grid-template-columns: minmax(0, 1fr); gap: 30px; }
  .how-step { position: relative; padding-left: 34px; }
  .how-head { flex-direction: row; align-items: baseline; margin-bottom: 0; }
  .how-head b { font-size: 40px; }
  .how-rail { position: absolute; left: 0; top: 8px; bottom: -38px; width: 12px; height: auto; margin: 0; }
  .how-rail::before { left: 50%; right: auto; top: 12px; bottom: 0; width: 1px; height: auto; }
  .how-step:last-child .how-rail::before { display: none; }
  .how-step > p { max-width: none; }
  .feat-nav { display: none; } /* 窄屏：不要固定目录，四块依次排下来 */
  .feat-panel { min-height: 0; opacity: 1; padding: 20px 0; }
  .hero-more { margin-top: 48px; gap: 40px; }
  .hp-screen { border-radius: 24px; }
  .hp-check { width: 52px; height: 52px; margin: -26px 0 0 -26px; }
}
@media (prefers-reduced-motion: reduce) { .hp-disc { animation: none; } }
@media (max-width: 560px) {
  .hero-readout li { font-size: 0; gap: 6px; } /* 太窄：只留编号和节点 */
  .hero-readout .mono-tag { font-size: 11px; }
  .hero-caps { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .cap-stat b { font-size: 36px; }
  .hm-grid, .hm-grid.cols-3, .priv-stats { grid-template-columns: minmax(0, 1fr); }
  .hm-grid, .hm-grid.cols-3 { gap: 8px; }
  .feat-vis { height: 230px; }
  .fv-occ { gap: 14px; padding: 0 14px; }
  .fv-phone { width: 96px; height: 196px; }
  .fv-tech, .fv-report { padding: 6px 16px; }
  .fv-row { grid-template-columns: 76px minmax(0, 1fr) 18px minmax(0, 1fr); }
}