/* ============================================================
   XnView 中文站 (xnview.com.cn) — 全站样式
   配色提取自 XnSoft 官方 Logo（红橙色系）
   ============================================================ */

:root {
  --orange-700: #b83d1e;
  --orange-600: #c8441f;
  --orange-500: #f06048;
  --orange-100: #fde7e1;
  --orange-50:  #fef5f2;
  --ink-900: #221713;
  --ink-700: #3d2f29;
  --ink-500: #66564f;
  --ink-300: #a5948c;
  --line:    #ece2dd;
  --bg:      #ffffff;
  --bg-soft: #fbf6f4;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(34, 23, 19, .08), 0 8px 24px rgba(34, 23, 19, .06);
  --shadow-lg: 0 4px 12px rgba(34, 23, 19, .10), 0 24px 48px rgba(34, 23, 19, .12);
  --font-sans: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --wrap: 1160px;
  --nav-h: 64px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink-700);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; }

a { color: var(--orange-600); text-decoration: none; }
a:hover { color: var(--orange-500); text-decoration: underline; }

:focus-visible { outline: 3px solid var(--orange-500); outline-offset: 2px; border-radius: 4px; }

/* ---------- 布局 ---------- */
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

.section { padding: 72px 0; }
.section--soft { background: var(--bg-soft); }
.section--line { border-top: 1px solid var(--line); }

.section-head { max-width: 760px; margin: 0 auto 40px; text-align: center; }
.section-head h2 { margin: 0 0 12px; font-size: 30px; line-height: 1.3; color: var(--ink-900); }
.section-head p { margin: 0; color: var(--ink-500); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, .96);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav { display: flex; align-items: center;justify-content: space-around; gap: 28px; height: var(--nav-h); }

.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: var(--ink-900); }
.brand:hover { color: var(--ink-900); text-decoration: none; }
.brand svg, .footer-brand svg { flex: none; }
.brand-logo, .footer-brand .brand-logo { display: block; flex: none; }
.brand .brand-tail { color: var(--orange-600); }

.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; list-style: none; }
.nav-links a {
  display: block; padding: 8px 14px; border-radius: 8px;
  font-size: 15px; color: var(--ink-700);
}
.nav-links a:hover { color: var(--orange-600); background: var(--orange-50); text-decoration: none; }
.nav-links a[aria-current="page"] { color: var(--orange-700); background: var(--orange-100); font-weight: 600; }

.nav-cta { margin-left: 12px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border: 1px solid transparent; border-radius: 8px;
  font-family: inherit; font-size: 16px; font-weight: 600; line-height: 1.4;
  cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: background .15s ease, border-color .15s ease, color .15s ease;
}
.btn:hover { text-decoration: none; }
.btn--primary { background: var(--orange-600); color: #fff; }
.btn--primary:hover { background: var(--orange-700); color: #fff; }
.btn--ghost { background: transparent; color: var(--orange-700); border-color: var(--orange-600); }
.btn--ghost:hover { background: var(--orange-50); color: var(--orange-600); }
.btn--sm { padding: 8px 18px; font-size: 14px; }
.btn--block { width: 100%; }
.btn--quiet { background: transparent; color: var(--ink-500); border-color: var(--line); }
.btn--quiet:hover { color: var(--ink-700); border-color: var(--ink-300); background: var(--bg-soft); }
.btn .icon { flex: none; }

/* ---------- Hero ---------- */
.hero { padding: 88px 0 80px; background:
  radial-gradient(720px 340px at 88% -40px, rgba(240, 96, 72, .09), transparent 65%),
  radial-gradient(560px 280px at -8% 60%, rgba(240, 96, 72, .06), transparent 60%),
  var(--bg-soft);
}
.hero-grid { display: grid; grid-template-columns: 1.06fr .94fr; gap: 56px; align-items: center; }
.hero h1 { margin: 18px 0 16px; font-size: 40px; line-height: 1.25; color: var(--ink-900); }
.hero-lead { margin: 0 0 28px; font-size: 17.5px; color: var(--ink-500); }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-note { margin: 14px 0 0; font-size: 13.5px; color: var(--ink-300); }
.hero-note a { color: var(--ink-500); }
.hero-figure { margin: 0; }
.hero-figure img {
  display: block; width: 100%; border-radius: var(--radius);
  border: 1px solid var(--line); box-shadow: var(--shadow-lg); background: #fff;
}
.hero-figure figcaption { margin-top: 12px; font-size: 13px; color: var(--ink-300); text-align: center; }

.badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--orange-100); color: var(--orange-700);
  font-size: 13.5px; font-weight: 600;
}

/* ---------- 功能/卡片网格 ---------- */
.grid { display: grid; gap: 22px; }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; box-shadow: var(--shadow);
}
.card h3 { display: flex; align-items: center; gap: 10px; margin: 0 0 8px; font-size: 17.5px; color: var(--ink-900); }
.card p { margin: 0; font-size: 14.5px; color: var(--ink-500); }
.card .icon-tile { margin-bottom: 14px; }

.icon-tile {
  display: inline-flex; align-items: center; justify-content: center;
  width: 46px; height: 46px; border-radius: 10px;
  background: var(--orange-100); color: var(--orange-700);
}

/* ---------- 场景卡 ---------- */
.scene-card { display: flex; flex-direction: column; gap: 10px; }
.scene-card .scene-tag { align-self: flex-start; }

/* ---------- 数据带 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; text-align: center; }
.stats .stat h3 { margin: 0 0 2px; font-size: 34px; color: var(--orange-600); font-variant-numeric: tabular-nums; }
.stats .stat p { margin: 0; font-size: 14px; color: var(--ink-500); }

/* ---------- 版本时间线 ---------- */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before { content: ""; position: absolute; left: 7px; top: 8px; bottom: 8px; width: 2px; background: var(--line); }
.timeline li { position: relative; padding: 0 0 26px 36px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: 0; top: 8px;
  width: 16px; height: 16px; border-radius: 50%;
  background: #fff; border: 3px solid var(--orange-500);
}
.timeline .tl-version { font-weight: 700; color: var(--ink-900); }
.timeline .tl-date { margin-left: 8px; font-size: 13px; color: var(--ink-300); }
.timeline p { margin: 4px 0 0; font-size: 14.5px; color: var(--ink-500); }

/* ---------- 步骤 ---------- */
.steps { list-style: none; margin: 0; padding: 0; counter-reset: step; display: grid; gap: 14px; }
.steps li {
  counter-increment: step;
  display: grid; grid-template-columns: 40px 1fr; gap: 14px; align-items: start;
  padding: 18px 20px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
}
.steps li::before {
  content: counter(step);
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--orange-600); color: #fff; font-weight: 700; font-size: 16px;
}
.steps h3 { margin: 2px 0 6px; font-size: 16.5px; color: var(--ink-900); }
.steps p { margin: 0; font-size: 14.5px; color: var(--ink-500); }
.steps .kbd { margin-top: 8px; display: block; font-size: 13px; color: var(--ink-500); }
.steps .kbd kbd {
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-700);
  background: var(--bg-soft); border: 1px solid var(--line); border-bottom-width: 2px;
  border-radius: 5px; padding: 1px 7px;
}

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
caption { caption-side: top; text-align: left; padding: 16px 20px 4px; font-weight: 700; color: var(--ink-900); font-size: 16px; }
th, td { padding: 12px 20px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
thead th { background: var(--bg-soft); color: var(--ink-900); font-size: 13.5px; white-space: nowrap; }
tbody tr:last-child td { border-bottom: 0; }
td .ok { color: var(--orange-600); font-weight: 600; }
td .no { color: var(--ink-300); }

/* ---------- 下载卡片 ---------- */
.dl-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.dl-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; display: flex; flex-direction: column;
}
.dl-card-head {
  display: flex; align-items: center; gap: 14px;
  padding: 22px 24px; border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, var(--orange-50), #fff);
}
.dl-card-head .icon-tile { width: 52px; height: 52px; }
.dl-card-head h2 { margin: 0; font-size: 21px; color: var(--ink-900); }
.dl-card-head .dl-meta { margin: 2px 0 0; font-size: 13px; color: var(--ink-500); }
.dl-card-body { padding: 22px 24px; display: flex; flex-direction: column; gap: 16px; flex: 1; }
.dl-card-body p { margin: 0; font-size: 14.5px; color: var(--ink-500); }
.dl-req { font-size: 13.5px; color: var(--ink-500); padding: 12px 16px; background: var(--bg-soft); border: 1px dashed var(--line); border-radius: 8px; }
.dl-req strong { color: var(--ink-700); }
.pkg-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.pkg-list li {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; border: 1px solid var(--line); border-radius: 8px; background: #fff;
}
.pkg-list .icon { flex: none; color: var(--ink-500); }
.pkg-list .pkg-info { flex: 1; min-width: 0; }
.pkg-list .pkg-name { font-weight: 600; color: var(--ink-900); font-size: 14.5px; }
.pkg-list .pkg-sub { display: block; font-size: 12.5px; color: var(--ink-300); margin-top: 1px; }

/* ---------- 家族产品行 ---------- */
.family-row { display: flex; align-items: flex-start; gap: 14px; padding: 18px 20px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
.family-row .icon-tile { flex: none; }
.family-row h3 { margin: 0 0 4px; font-size: 16px; color: var(--ink-900); }
.family-row p { margin: 0; font-size: 14px; color: var(--ink-500); }
.family-row .fam-ver { font-size: 12.5px; color: var(--orange-700); background: var(--orange-100); border-radius: 999px; padding: 1px 10px; white-space: nowrap; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; }
.faq details {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0 22px; box-shadow: var(--shadow);
}
.faq details[open] { border-color: var(--orange-500); }
.faq summary {
  cursor: pointer; padding: 17px 0; font-weight: 600; font-size: 15.5px; color: var(--ink-900);
  display: flex; align-items: center; justify-content: space-between; gap: 16px; list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary .chev { flex: none; color: var(--ink-300); transition: transform .18s ease; }
.faq details[open] summary .chev { transform: rotate(180deg); color: var(--orange-600); }
.faq .faq-a { margin: 0; padding: 0 0 18px; font-size: 14.5px; color: var(--ink-500); max-width: 860px; }

/* ---------- 页脚 ---------- */
.site-footer { margin-top: 72px; background: var(--ink-900); color: #d6ccc7; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 36px; padding: 52px 0 40px; }
.footer-grid h3 { margin: 0 0 14px; font-size: 14px; color: #fff; letter-spacing: .08em; }
.footer-grid p { margin: 0 0 10px; line-height: 1.7; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.footer-grid a { color: #d6ccc7; }
.footer-grid a:hover { color: #fff; }
.footer-brand { display: inline-flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .12); padding: 20px 0; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; font-size: 13px; color: #a5948c; }
.footer-bottom a { color: #d6ccc7; }
.footer-bottom a:hover { color: #fff; text-decoration: none; }

/* ---------- 面包屑 ---------- */
.breadcrumb { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 18px 0 0; margin: 0; font-size: 13.5px; color: var(--ink-300); }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 6px; color: var(--ink-300); }
.breadcrumb a { color: var(--ink-500); }

/* ---------- 页面通用头 ---------- */
.page-head { padding: 48px 0 8px; }
.page-head h1 { margin: 10px 0 12px; font-size: 34px; color: var(--ink-900); line-height: 1.3; }
.page-head .lead { margin: 0; max-width: 820px; font-size: 16.5px; color: var(--ink-500); }

/* ---------- 提示条 ---------- */
.note {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 14px 18px; border-radius: 8px; font-size: 14px;
  background: var(--orange-50); border: 1px solid var(--orange-100); color: var(--ink-700);
}
.note .icon { flex: none; margin-top: 3px; color: var(--orange-600); }
.note strong { color: var(--ink-900); }

/* ---------- 锚点小节 ---------- */
.subsec { padding: 34px 0; }
.subsec + .subsec { border-top: 1px dashed var(--line); }
.subsec h2 { margin: 0 0 18px; font-size: 24px; color: var(--ink-900); }
.subsec h3 { margin: 26px 0 10px; font-size: 17.5px; color: var(--ink-900); }
.subsec p, .subsec li { font-size: 15px; color: var(--ink-500); }
.subsec ul, .subsec ol { padding-left: 22px; }
.subsec li { margin: 4px 0; }

/* ---------- 下载弹窗 ---------- */
.dl-overlay {
  position: fixed; inset: 0; z-index: 200;
  display: flex; align-items: center; justify-content: center; padding: 24px;
  background: rgba(34, 23, 19, .55);
  opacity: 0; visibility: hidden; transition: opacity .18s ease, visibility .18s ease;
}
.dl-overlay.is-open { opacity: 1; visibility: visible; }

.dl-modal {
  position: relative; width: 640px; max-width: 100%;
  background: #fff; border-radius: 14px; box-shadow: var(--shadow-lg);
  padding: 34px 36px 30px; text-align: center;
  transform: translateY(14px) scale(.97); transition: transform .18s ease;
}
.dl-overlay.is-open .dl-modal { transform: translateY(0) scale(1); }

.dl-modal__close {
  position: absolute; top: 14px; right: 14px;
  width: 36px; height: 36px; border: none; border-radius: 8px;
  background: transparent; color: var(--ink-500); cursor: pointer;
  display: inline-flex; align-items: center; justify-content: center;
}
.dl-modal__close:hover { background: var(--bg-soft); color: var(--ink-900); }

.dl-modal h2 { margin: 0 0 6px; font-size: 22px; color: var(--ink-900); }
.dl-modal .dl-modal__sub { margin: 0 0 22px; font-size: 14px; color: var(--ink-500); }

.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.qr-box {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 20px 14px 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--bg-soft);
}
.qr-box .qr-slot {
  width: 170px; height: 170px; background: #fff;
  border: 2px dashed var(--ink-300); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
}
.qr-box .qr-slot .icon { color: var(--ink-300); }
.qr-box .qr-label { font-size: 14px; font-weight: 600; color: var(--ink-700); }
.qr-box .qr-hint { margin: 0; font-size: 12.5px; color: var(--ink-300); }

.dl-modal__tip { margin: 22px 0 0; font-size: 13px; color: var(--ink-500); }
.dl-modal__tip a { color: var(--orange-600); }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 90;
  width: 44px; height: 44px; border-radius: 10px; border: 1px solid var(--line);
  background: #fff; color: var(--orange-700); cursor: pointer; box-shadow: var(--shadow);
  display: inline-flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity .18s ease, visibility .18s ease, transform .18s ease;
}
.to-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }
.to-top:hover { background: var(--orange-50); }

/* 菜单按钮：默认隐藏，小屏由媒体查询显示 */
.nav-toggle {
  display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; color: var(--ink-700); cursor: pointer; align-items: center; justify-content: center;
}

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero h1 { font-size: 33px; }
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .dl-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .section { padding: 52px 0; }
  .nav { gap: 10px; }
  .nav-links { display: none; }
  .nav-links.is-open {
    display: flex; flex-direction: column; align-items: stretch; gap: 2px;
    position: absolute; top: var(--nav-h); left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    padding: 10px 16px 16px; box-shadow: var(--shadow-lg);
  }
  .nav-toggle { display: inline-flex; margin-left: auto; }
  .nav-cta { display: none; }
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 52px; }
  .hero h1 { font-size: 27px; }
  .qr-grid { grid-template-columns: 1fr; }
  .dl-modal { padding: 26px 20px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 26px; }
  .nav-toggle { display: inline-flex; }
}