/* Orange 官网 —— 纯白极简，与桌面端风格一致 */
:root {
  --bg: #ffffff;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --line: #ececec;
  --card: #fafafa;
  --accent: #ff7a18;      /* Orange */
  --accent-ink: #ffffff;
  --radius: 14px;
  --maxw: 1040px;
  --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 24px; }

/* ---- 顶栏 ---- */
header.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 28px; height: 60px; }
.brand { font-weight: 700; font-size: 19px; letter-spacing: -.01em; }
.brand .dot { color: var(--accent); }
.nav nav { display: flex; gap: 22px; margin-left: auto; font-size: 14.5px; color: var(--muted); }
.nav nav a:hover { color: var(--fg); }
.nav .cta { margin-left: 8px; }

/* ---- 按钮 ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 999px;
  font-size: 15px; font-weight: 600; cursor: pointer;
  border: 1px solid var(--line); background: #fff; color: var(--fg);
  transition: transform .08s ease, background .15s ease, border-color .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { background: #f06a08; }
.btn.lg { padding: 14px 26px; font-size: 16px; }
.btn:disabled { opacity: .55; cursor: default; transform: none; }

/* ---- 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; }

/* ---- 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; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
footer a:hover { color: var(--fg); }

/* ---- 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; }
}