/* SubEar 官网 —— 纯白极简 + 暖金点缀，与桌面端 / 首页 index 统一 */
:root {
  --bg: #ffffff;
  --fg: #0a0a0a;
  --muted: #6b6f76;
  --line: #ececec;
  --card: #faf9f7;
  --accent: #c99a3f;      /* 暖金（原 Orange 橙已弃用，全站统一金） */
  --accent-ink: #ffffff;
  --gold: #a97f31; --gold-ink: #8a5e12; --gold-soft: #c99a3f; --gold-line: #ecdcb8;
  --radius: 14px;
  --maxw: 1160px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 40px; }

/* ---- 顶栏（与首页 index 完全一致：品牌含图标贴左、导航贴右、右端一枚金色按钮）---- */
header.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
/* 导航栏比正文更宽一档：品牌更贴左、右侧标题更贴右（正文仍是 --maxw 1160） */
.nav .wrap { display: flex; align-items: center; gap: 30px; height: 66px; max-width: 1320px; padding: 0 32px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; font-size: 21px; letter-spacing: -.01em; }
.brand img { width: 30px; height: 30px; border-radius: 8px; border: 1px solid #e2ded7; }
.brand .dot { color: var(--gold-soft); }
.nav nav { display: flex; gap: 26px; font-size: 15px; font-weight: 550; color: var(--muted); }
.nav nav a:hover { color: var(--fg); }
.nav nav a.on { color: var(--fg); font-weight: 700; }
/* 品牌贴最左，导航标题 + 登录 + 下载整体靠右（品牌 margin-right:auto 吃掉中间留白，
   移动端 <780px 隐藏 nav 时同样成立，比多个 margin-left:auto 更稳） */
.nav .brand { margin-right: auto; }
.nav #sa-nav { margin-left: 0; }
.nav .cta { margin-left: 0; }

/* ---- 按钮：暖金实心 + 描边（不用黑/深实心底），与首页一致 ---- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 12px 22px; border-radius: 999px;
  font-size: 15px; font-weight: 650; cursor: pointer;
  border: 1.5px solid #dcd7cc; background: #fff; color: var(--fg);
  transition: transform .14s cubic-bezier(.34,1.56,.64,1), border-color .15s ease, box-shadow .18s ease;
}
.btn:hover { transform: translateY(-2px); border-color: #b9b2a4; }
.btn.primary, .btn.solid { background: linear-gradient(135deg,#f2d891,#e2b74e); color: #5a4410; border-color: #d9ad46; font-weight: 700; }
.btn.primary:hover, .btn.solid:hover { box-shadow: 0 10px 24px rgba(201,154,63,.30); }
.btn.sm { padding: 9px 18px; font-size: 14px; }
.btn.lg { padding: 14px 26px; font-size: 16px; }
.btn.soon { background: var(--card); color: var(--muted); border-color: var(--line); cursor: default; font-weight: 650; }
.btn.soon:hover { transform: none; box-shadow: none; }
.btn:disabled { opacity: .55; cursor: default; transform: none; }
/* [hidden] 的 UA 规则(display:none)会被 .btn 的 display:inline-flex 覆盖，导致带 hidden 的
   「即将开放」按钮在 DOWNLOAD_READY=true 时仍露出。强制生效，修此泄漏。 */
[hidden] { display: none !important; }

/* ---- Hero ---- */
.hero { padding: 92px 0 64px; text-align: center; }
.hero h1 { font-size: clamp(34px, 6vw, 56px); line-height: 1.08; letter-spacing: -.02em; margin: 0 0 18px; }
.hero p.sub { font-size: clamp(16px, 2.4vw, 20px); color: var(--muted); max-width: 640px; margin: 0 auto 32px; }
.hero .actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero .ver { margin-top: 14px; font-size: 13px; color: var(--muted); }

/* ---- Hero 截图 ---- */
.shot-hero { margin: 48px auto 0; max-width: 900px; }
.shot-hero img,
.shot-hero video {
  width: 100%; height: auto; display: block;
  border-radius: var(--radius); border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(0,0,0,.10);
}

/* ---- 分句方式小图示（对应 App 内「分句方式」分段选择器） ---- */
.seg-chips { display: inline-flex; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; margin-top: 10px; background: #f4f2ee; }
.seg-chips .chip { padding: 10px 28px; font-size: 15px; color: var(--muted); }
.seg-chips .chip.on { background: #fff; color: var(--fg); font-weight: 600; border-radius: 12px; box-shadow: 0 1px 4px rgba(0,0,0,.08); }

/* ---- 界面截图画廊 ---- */
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 48px; }
.gallery figure { margin: 0; }
.gallery img {
  width: 100%; height: auto; display: block;
  border-radius: 12px; border: 1px solid var(--line);
  box-shadow: 0 10px 30px rgba(0,0,0,.06);
}
.gallery figcaption { text-align: center; color: var(--muted); font-size: 14px; margin-top: 12px; }

/* ---- 区块 ---- */
section { padding: 64px 0; border-top: 1px solid var(--line); }
section h2 { font-size: clamp(26px, 4vw, 36px); letter-spacing: -.02em; margin: 0 0 8px; text-align: center; }
section .lead { color: var(--muted); text-align: center; max-width: 620px; margin: 0 auto 44px; }

/* ---- 功能卡片：一排两个（媒体在上，文字在下） ---- */
.feat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 56px 44px; }
.feat { text-align: left; }
.feat-media {
  aspect-ratio: 1600 / 1156; overflow: hidden;   /* 对齐演示视频比例：视频铺满、截图完整不裁切 */
  border-radius: 14px; border: 1px solid var(--line);
  box-shadow: 0 14px 36px rgba(0,0,0,.08); background: #eceae6;
}
.feat-media video, .feat-media img {
  width: 100%; height: 100%; object-fit: contain; display: block;
}
.feat-media.todo {
  display: flex; align-items: center; justify-content: center;
  border-style: dashed; box-shadow: none; background: #faf9f7; color: var(--muted); font-size: 15px;
}
.feat .tag {
  display: inline-block; margin: 0 0 10px; padding: 3px 12px;
  font-size: 12.5px; color: var(--fg); background: #f4f2ee;
  border: 1px solid var(--line); border-radius: 20px;
}
.feat h3 { margin: 0 0 16px; font-size: 20px; letter-spacing: -.01em; }
.feat p { margin: 16px 0 0; color: var(--muted); font-size: 15px; line-height: 1.75; }
@media (max-width: 820px) { .feat-grid { grid-template-columns: 1fr; gap: 40px; } }

/* ---- 下载「即将开放」占位 + 说明 ---- */
.soon-pill { background: #f0efec; color: var(--muted); border: 1px solid var(--line); cursor: default; }
.dl-note { max-width: 640px; margin: 22px auto 0; color: var(--muted); font-size: 14px; line-height: 1.85; text-align: center; }

/* ---- Windows SmartScreen 安装提示（折叠） ---- */
.win-guide { max-width: 640px; margin: 20px auto 0; text-align: left; border: 1px solid var(--line); border-radius: var(--radius); background: var(--card); overflow: hidden; }
.win-guide > summary { list-style: none; cursor: pointer; padding: 14px 18px; font-size: 14.5px; font-weight: 600; color: var(--fg); display: flex; align-items: center; gap: 8px; }
.win-guide > summary::-webkit-details-marker { display: none; }
.win-guide > summary .chev { margin-left: auto; color: var(--muted); transition: transform .15s ease; }
.win-guide[open] > summary .chev { transform: rotate(90deg); }
.win-guide .wg-body { padding: 4px 18px 20px; }
.win-guide .wg-intro { margin: 0 0 16px; color: var(--muted); font-size: 14px; line-height: 1.8; }
.win-guide .wg-intro b { color: var(--fg); }
/* SmartScreen 弹窗示意（纯 CSS，无需截图） */
.ss-mock { border: 1px solid var(--line); border-radius: 10px; background: #fff; box-shadow: 0 8px 24px rgba(0,0,0,.06); overflow: hidden; margin: 0 0 18px; }
.ss-mock .ss-head { background: #f4f2ee; padding: 12px 16px; font-size: 14px; font-weight: 600; color: var(--fg); border-bottom: 1px solid var(--line); }
.ss-mock .ss-body { padding: 14px 16px; font-size: 13px; color: var(--muted); line-height: 1.7; }
.ss-mock .ss-link { display: inline-block; margin-top: 8px; color: #2563eb; font-size: 13px; position: relative; }
.ss-mock .ss-actions { display: flex; gap: 10px; padding: 0 16px 16px; }
.ss-mock .ss-btn { font-size: 13px; padding: 7px 16px; border-radius: 6px; border: 1px solid var(--line); background: #f7f6f4; color: var(--fg); }
.ss-mock .ss-btn.hot { border: none; background: var(--accent); color: #fff; font-weight: 600; }
/* 橙色高亮圈 + 「点这里」气泡，标出用户该点的位置 */
.hilite { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.tag { display: inline-block; background: var(--accent); color: #fff; font-size: 11px; font-weight: 700; padding: 2px 8px; border-radius: 999px; margin-left: 8px; vertical-align: middle; white-space: nowrap; }
.win-guide .wg-steps { margin: 0; padding: 0; list-style: none; counter-reset: wg; }
.win-guide .wg-steps li { position: relative; padding: 0 0 12px 34px; color: var(--muted); font-size: 14px; line-height: 1.7; counter-increment: wg; }
.win-guide .wg-steps li::before { content: counter(wg); position: absolute; left: 0; top: 0; width: 22px; height: 22px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 12.5px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.win-guide .wg-steps li:last-child { padding-bottom: 0; }
.win-guide .wg-steps b { color: var(--fg); }
.win-guide .wg-foot { margin: 16px 0 0; font-size: 12.5px; color: var(--muted); line-height: 1.7; }

/* ---- 功能网格 ---- */
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px;
}
.card .ico { font-size: 26px; margin-bottom: 12px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---- 三大界面 步骤 ---- */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; counter-reset: s; }
.step { position: relative; padding-top: 8px; }
.step .n {
  width: 34px; height: 34px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 700;
  display: flex; align-items: center; justify-content: center; margin-bottom: 14px;
}
.step h3 { margin: 0 0 6px; font-size: 18px; }
.step p { margin: 0; color: var(--muted); font-size: 14.5px; }

/* ---- 定价 ---- */
.pricing { display: flex; justify-content: center; }
.plan {
  background: #fff; border: 2px solid var(--accent);
  border-radius: 18px; padding: 34px 40px; text-align: center; max-width: 380px; width: 100%;
}
.plan .price { font-size: 46px; font-weight: 800; letter-spacing: -.02em; }
.plan .price small { font-size: 16px; font-weight: 500; color: var(--muted); }
.plan ul { list-style: none; padding: 0; margin: 22px 0; text-align: left; }
.plan li { padding: 7px 0; color: var(--fg); font-size: 15px; }
.plan li::before { content: "✓"; color: var(--accent); font-weight: 700; margin-right: 10px; }

/* ---- 下载区 ---- */
.dl { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---- 卡密表单（claim / help 共用）---- */
.panel {
  max-width: 560px; margin: 0 auto;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px;
}
.panel label { display: block; font-weight: 600; margin-bottom: 8px; font-size: 15px; }
.panel input[type=text] {
  width: 100%; padding: 13px 15px; font-size: 15px;
  border: 1px solid #dcdcdc; border-radius: 10px; background: #fff;
  font-family: var(--font);
}
.panel input[type=text]:focus { outline: none; border-color: var(--accent); }
.panel .hint { font-size: 13px; color: var(--muted); margin: 8px 0 18px; }
.result {
  margin-top: 22px; padding: 18px; border-radius: 10px;
  display: none; word-break: break-all;
}
.result.show { display: block; }
.result.ok { background: #f1fbf3; border: 1px solid #cdeccf; }
.result.err { background: #fdf2f2; border: 1px solid #f3d0d0; color: #b02a2a; }
.result .key {
  font-size: 22px; font-weight: 700; letter-spacing: .04em;
  font-family: ui-monospace, "SF Mono", Menlo, monospace;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.copy { font-size: 13px; padding: 5px 12px; }

/* ---- 帮助 FAQ ---- */
.faq { max-width: 720px; margin: 0 auto; }
.faq details {
  border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 20px; margin-bottom: 12px; background: var(--card);
}
.faq summary { font-weight: 600; cursor: pointer; font-size: 16px; }
.faq details p { color: var(--muted); margin: 12px 0 0; }
.faq details ol { color: var(--muted); margin: 12px 0 0; padding-left: 20px; }
.faq code { background: #eee; padding: 2px 6px; border-radius: 5px; font-size: 13px; }

/* ---- 页脚 ---- */
footer { border-top: 1px solid var(--line); padding: 40px 0 34px; color: #9aa0a7; font-size: 13px; }
footer .wrap { display: flex; flex-direction: column; align-items: center; gap: 12px; text-align: center; }
footer .flinks { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
footer a:hover { color: var(--fg); }
/* 备案号：整行居中在页脚底部，比其它页脚文字更淡；警徽用 beian-police.png（与首页一致） */
footer .beian { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; font-size: 12px; opacity: .85; margin-top: 2px; }
footer .beian a { color: var(--muted); }
footer #policeBeian { display: inline-flex; align-items: center; }
footer #policeBeian img { height: 14px; margin-right: 5px; }

/* ---- 页内子标题 ---- */
.page-head { padding: 72px 0 20px; text-align: center; }
.page-head h1 { font-size: clamp(28px, 5vw, 40px); margin: 0 0 10px; letter-spacing: -.02em; }
.page-head p { color: var(--muted); margin: 0; }

@media (max-width: 780px) {
  .grid, .steps, .gallery { grid-template-columns: 1fr; }
  .nav nav { display: none; }
}