/* 基础重置 */
* { box-sizing: border-box; }
html,body { margin:0; padding:0; font-family: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif; color:#222; }
body { line-height:1.55; background:#fff; }
img { max-width:100%; display:block; }
a { color:inherit; text-decoration:none; }
a:hover { text-decoration:underline; }

:root {
  --c-bg-dark:#14161b;
  --c-bg-darker:#111318;
  --c-border:#2d3036;
  --c-text-light:#d0d3d8;
  --c-accent-green:#007d70;
  --c-accent-lime:#3fa800;
  --c-accent-blue:#003e7d;
  --c-accent-grad:linear-gradient(90deg,#008d7a,#00a67a);
  --c-slash:#999;
  --header-height:72px;
}

.container { width:100%; max-width:1240px; margin:0 auto; padding:0 32px; }
.visually-hidden{ position:absolute; width:1px; height:1px; overflow:hidden; clip:rect(1px,1px,1px,1px); white-space:nowrap; }

/* Header */
.site-header { position:fixed; top:0; left:0; right:0; height:var(--header-height); background:rgba(255,255,255,0.9); backdrop-filter: blur(8px); box-shadow:0 2px 4px rgba(0,0,0,.06); z-index:20; }
.header-inner { display:flex; align-items:center; gap:56px; height:100%; }
.brand img { height:46px; width:auto; }
.main-nav ul { list-style:none; margin:0; padding:0; display:flex; gap:40px; }
.main-nav a { font-size:15px; font-weight:500; position:relative; padding:4px 2px; }
.main-nav .current > a::after { content:''; position:absolute; left:0; right:0; bottom:-4px; height:2px; background:var(--c-accent-green); }
.has-sub { position:relative; }
.has-sub .sub { position:absolute; top:100%; left:0; background:#fff; box-shadow:0 8px 24px -8px rgba(0,0,0,.15); list-style:none; padding:8px 0; margin:8px 0 0; min-width:160px; opacity:0; visibility:hidden; transform:translateY(6px); transition:.25s; }
.has-sub:hover .sub { opacity:1; visibility:visible; transform:translateY(0); }
.has-sub .sub li a { display:block; padding:8px 16px; font-size:14px; white-space:nowrap; }
.has-sub .sub li a:hover { background:#f5f7fa; }

/* Hero */
.hero { position:relative; height:720px; display:flex; align-items:center; justify-content:center; margin-top:var(--header-height); }
.hero-bg { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; filter:brightness(.55); }
.hero-overlay { position:relative; z-index:2; text-align:center; color:#fff; padding:24px 32px; backdrop-filter: blur(3px); }
.tag-en { font-style:italic; font-size:28px; letter-spacing:.5px; margin:0 0 12px; color:#0f0f0f; }
.slogan { margin:0; font-size:54px; font-weight:600; letter-spacing:4px; display:flex; flex-wrap:wrap; justify-content:center; gap:4px; line-height:1.15; }
.slogan .word { position:relative; padding:4px 2px; }
.slogan .slashes { font-size:22px; line-height:60px; color:var(--c-slash); margin:0 14px; letter-spacing:-2px; }
.slogan .accent-green { background:var(--c-accent-grad); -webkit-background-clip:text; background-clip:text; color:transparent; }
.slogan .accent-lime { color:var(--c-accent-lime); }
.slogan .accent-blue { color:var(--c-accent-blue); }

.slogan-img {
  display:block;
  width:min(860px, 92vw);
  height:auto;
  margin:0 auto;
}

/* Download CTA (hero) */
.download-cta {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:220px;
  height:64px;
  padding:0 28px;
  margin:18px auto 22px;
  font-size:18px;
  font-weight:700;
  color:#fff;
  text-decoration:none;
  background-image: url("IMG/下载按钮.png");
  background-size:cover;
  background-position:center;
  background-repeat:no-repeat;
  border-radius:34px;
}

.download-cta:hover,
.download-cta:focus,
.download-cta:active,
.download-cta:visited {
  text-decoration:none;
  box-shadow:none;
}

/* Download panel */
body.download-open { overflow:hidden; }

.download-panel {
  position:fixed;
  top:var(--header-height);
  left:0;
  right:0;
  bottom:0;
  z-index:30;
  display:flex;
  align-items:flex-start;
  justify-content:center;
  padding:34px 24px 28px;
  background:rgba(0,0,0,.58);
}

/* Ensure hidden attribute actually hides the panel (override display:flex) */
.download-panel[hidden] { display:none; }

.download-panel a,
.download-panel a:hover { text-decoration:none; }

.download-panel-inner {
  width:min(1120px, 100%);
  margin-top:164px;
}

.download-card {
  position:relative;
  background:rgba(255,255,255,.92);
  border:1px solid rgba(255,255,255,.65);
  border-radius:14px;
  padding:34px 32px 28px;
  box-shadow:none;
}

.download-close {
  position:absolute;
  top:16px;
  right:16px;
  width:36px;
  height:36px;
  border:0;
  padding:0;
  border-radius:18px;
  background:transparent;
  cursor:pointer;
  -webkit-tap-highlight-color: transparent;
}

.download-close:focus,
.download-close:focus-visible {
  outline:none;
  box-shadow:none;
}

.download-close::-moz-focus-inner {
  border:0;
}

.download-close::before,
.download-close::after {
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  width:18px;
  height:2px;
  background:#0a0a0a;
  transform-origin:center;
}

.download-close::before { transform:translate(-50%,-50%) rotate(45deg); }
.download-close::after { transform:translate(-50%,-50%) rotate(-45deg); }

.download-mobile { display:none; }

.download-section { margin:0 0 14px; }

.download-section-title {
  background:#0a0a0a;
  color:#ffffff;
  font-size:14px;
  font-weight:700;
  padding:12px 14px;
  border-radius:8px;
  margin:0 0 10px;
}

.download-row {
  display:flex;
  align-items:center;
  gap:12px;
  width:100%;
  padding:14px 14px;
  background:#E4EAF3;
  border-radius:8px;
  color:#2b2f36;
}

.download-row + .download-row { margin-top:10px; }

.download-row-icon {
  width:22px;
  height:22px;
  object-fit:contain;
  flex:0 0 22px;
}

.download-row-text {
  font-size:16px;
  font-weight:700;
  letter-spacing:.5px;
}

.download-title {
  margin:0 0 6px;
  text-align:center;
  font-size:32px;
  font-weight:700;
  letter-spacing:2px;
  color:#0a0a0a;
}

.download-desc {
  margin:0 0 18px;
  text-align:center;
  font-size:14px;
  line-height:1.7;
  color:rgba(14, 13, 13, 0.9);
}

.download-grid {
  border-radius:10px;
  overflow:hidden;
  background:#efefef;
  display:grid;
  grid-template-columns:1fr 22px 1fr 1fr 1fr 22px 1fr;
}

.download-group-labels {
  display:grid;
  grid-template-columns:1fr 22px 1fr 1fr 1fr 22px 1fr;
  align-items:end;
  margin:0 0 10px;
}

.download-group-label {
  font-size:12px;
  line-height:1.2;
  color:#6b7280;
  text-align:center;
}

.download-group-label--desktop { grid-column:1; }
.download-group-label--mobile { grid-column:3 / 6; }
.download-group-label--doc { grid-column:7; }

.download-spacer {
  background:transparent;
}

.download-item {
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:16px;
  padding:22px 14px;
  min-height:170px;
  color:#2b2f36;
  background:#E4EAF3;
  transition:background-color .18s ease;
}

.download-item:last-child { border-right:0; }

.download-item:hover,
.download-item:focus-visible {
  background:#d2d9e4;
}

.download-icon {
  width:56px;
  height:56px;
  object-fit:contain;
}

.download-text {
  font-size:14px;
  font-weight:600;
  text-align:center;
  line-height:1.35;
}

@media (max-width: 960px) {
  .download-card { padding:24px 18px 18px; }
  .download-title { font-size:26px; }
  .download-grid { grid-template-columns:repeat(2, 1fr); }
  .download-spacer { display:none; }
  .download-group-labels { grid-template-columns:repeat(2, 1fr); }
  .download-group-label--desktop,
  .download-group-label--mobile,
  .download-group-label--doc { grid-column:auto; }
  .download-group-labels { display:none; }
  .download-item { border-right:0; border-bottom:0; }
}

@media (max-width: 720px) {
  .download-panel {
    top:0;
    padding:22px 18px;
    align-items:center;
    overflow:auto;
  }

  .download-panel-inner {
    margin-top:0;
    width:100%;
    max-width:520px;
  }

  .download-card {
    padding:48px 16px 18px;
    border-radius:16px;
    background:rgba(255,255,255,.96);
  }

  .download-title {
    font-size:22px;
    letter-spacing:1px;
  }

  .download-desc {
    font-size:12px;
    margin:0 0 14px;
  }

  .download-close {
    top:12px;
    right:12px;
    width:40px;
    height:40px;
  }

  .download-grid { display:none; }
  .download-mobile { display:block; }
}

@media (max-width: 520px) {
  .download-grid { grid-template-columns:1fr; }
  .download-spacer { display:none; }
  .download-item { border-right:0; border-bottom:0; }
}

/* (主内容区域已移除, 保留占位注释) */

/* Footer */
.site-footer { background:var(--c-bg-dark); color:var(--c-text-light); margin-top:0; font-size:14px; }
.footer-top { display:flex; flex-wrap:wrap; gap:48px; padding:56px 32px 40px; }
.footer-brand-block { display:flex; flex-direction:column; gap:18px; min-width:240px; }
.footer-logo { width:180px; }
.tel { font-size:20px; font-weight:600; margin:0 0 4px; letter-spacing:1px; }
.contact a { color:var(--c-text-light); }
.footer-links { display:flex; flex:1; gap:56px; flex-wrap:wrap; }
.footer-links .col { min-width:140px; }
.footer-links h3 { font-size:15px; margin:0 0 12px; font-weight:600; letter-spacing:1px; color:#fff; }
.footer-links ul { list-style:none; margin:0; padding:0; display:grid; gap:6px; }
.footer-links a { color:var(--c-text-light); transition:.25s; }
.footer-links a:hover { color:#fff; }
/* 已移除二维码模块样式 */
.legal { border-top:1px solid var(--c-border); display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:24px; padding:20px 32px; background:var(--c-bg-darker); }
.legal p { margin:0; font-size:12px; letter-spacing:.5px; }
.social { list-style:none; margin:0; padding:0; display:flex; gap:20px; }
.icon { width:26px; height:26px; display:inline-block; background:#2d3239; border-radius:50%; position:relative; overflow:hidden; }
.icon::after { content:''; position:absolute; inset:0; margin:auto; width:14px; height:14px; background:linear-gradient(135deg,#45cfa7,#2080d0); mask:radial-gradient(circle at 30% 30%,#000 55%,transparent 56%); -webkit-mask:radial-gradient(circle at 30% 30%,#000 55%,transparent 56%); opacity:.7; }
.icon:hover { background:#3a414b; }

/* 移动端抽屉导航与汉堡按钮 */
.nav-toggle { display:none; background:none; border:0; width:40px; height:40px; position:relative; margin-left:auto; cursor:pointer; }
.nav-toggle .bar,
.nav-toggle .bar::before,
.nav-toggle .bar::after { content:""; position:absolute; left:8px; right:8px; height:2px; background:#222; transition:.25s; }
.nav-toggle .bar { top:50%; transform:translateY(-50%); }
.nav-toggle .bar::before { top:-9px; }
.nav-toggle .bar::after { top:9px; }
body.nav-open .nav-toggle .bar { background:transparent; }
body.nav-open .nav-toggle .bar::before { top:0; transform:rotate(45deg); }
body.nav-open .nav-toggle .bar::after { top:0; transform:rotate(-45deg); }
body.nav-open { overflow:hidden; }

/* 下载图标基础样式（桌面与移动共用） */
.download-list .dl-item { display:flex; align-items:center; gap:8px; line-height:1.4; }
.download-list .dl-ico { width:18px; height:18px; object-fit:contain; display:block; flex-shrink:0; }
/* 强制覆盖更高特指度（确保不会被 .has-sub .sub li a 覆盖） */
.has-sub .download-list li a.dl-item { display:flex; align-items:center; }

@media (max-width:960px) {
  .header-inner { justify-content:space-between; }
  .nav-toggle { display:block; }
  /* 抽屉容器（改为自适应高度的弹出面板） */
  #site-nav.main-nav { position:fixed; z-index:21; top:calc(var(--header-height) + 8px); right:12px; bottom:auto; width:78%; max-width:340px; background:#fff; box-shadow:0 10px 28px -6px rgba(0,0,0,.25); transform:translateX(120%); transition:transform .28s ease; height:auto; max-height:80vh; overflow:hidden; border-radius:12px; }
  body.nav-open #site-nav { transform:translateX(0); }
  /* 遮罩 */
  body.nav-open::after { content:""; position:fixed; inset:0; background:rgba(0,0,0,.35); z-index:19; }
  /* 垂直菜单布局 */
  .main-nav ul { display:flex; flex-direction:column; gap:0; margin:0; padding:4px 0; border-radius:inherit; overflow:hidden; }
  .main-nav li { border-bottom:1px solid #e6e9ec; }
  .main-nav ul > li:last-child { border-bottom:0; }
  .main-nav a { display:block; padding:14px 18px; font-size:15px; }
  /* 子菜单折叠展开 */
  .has-sub .sub { position:static; box-shadow:none; margin:0; padding:0; min-width:auto; opacity:1; visibility:visible; transform:none; max-height:0; overflow:hidden; transition:max-height .25s ease; background:#f1f3f5; border-top:1px solid #dde1e5; }
  .has-sub.open .sub { max-height:480px; }
  .has-sub > a { position:relative; padding-right:34px; font-weight:600; }
  .has-sub > a::after { content:''; position:absolute; right:16px; top:50%; width:8px; height:8px; border-right:2px solid #666; border-bottom:2px solid #666; transform:translateY(-50%) rotate(-45deg); transition:.2s; }
  .has-sub.open > a::after { transform:translateY(-50%) rotate(45deg); }
  /* 颜色与交互 */
  .main-nav a:hover { background:#f5f7fa; }
  .has-sub.open > a { background:#eef1f4; }
  .has-sub .sub li a { padding:10px 26px 10px 40px; font-size:14px; background:transparent; position:relative; }
  .has-sub .sub li + li a { border-top:1px solid rgba(0,0,0,.05); }
  .has-sub .sub li a:hover { background:#fff; }
  /* 轻微渐变提升层次 */
  #site-nav.main-nav { background:linear-gradient(180deg,#ffffff,#f8f9fa); border:1px solid #e3e6ea; }

  /* 覆盖移动端下载项图标左内边距，与统一对齐 */
  .download-list .dl-item { padding-left:18px; }
  .download-list .dl-ico { flex:0 0 18px; }
}
@media (max-width:680px) {
  .slogan { font-size:36px; letter-spacing:2px; }
  .hero { height:520px; }
}
@media (max-width:520px) {
  :root { --header-height:60px; }
  .site-header { height:var(--header-height); }
  .brand img { height:40px; }
  .slogan { font-size:30px; }
  .slogan .slashes { display:none; }
  .footer-top { padding:40px 20px 28px; }
}

/* Privacy policy page */
.policy { padding:40px 0 72px; }
.policy-inner { max-width:920px; }

.policy-header { margin:0 0 22px; }
.policy-title { margin:8px 0 8px; font-size:32px; line-height:1.25; letter-spacing:1px; }
.policy-company { margin:0; font-weight:600; }

.policy-meta { margin:0 0 8px; font-size:13px; color:#6b7280; display:flex; flex-wrap:wrap; gap:8px; }
.policy-meta-sep { opacity:.7; }

.policy-section { margin:26px 0 0; }
.policy-section h2 { margin:0 0 10px; font-size:20px; line-height:1.35; }
.policy-section h3 { margin:14px 0 8px; font-size:16px; line-height:1.4; }

.policy-section p { margin:0 0 10px; }
.policy a { text-decoration:underline; }

.policy-toc,
.policy-list { margin:0 0 10px; padding-left:22px; }
.policy-toc li,
.policy-list li { margin:6px 0; }

.policy-sub { margin-top:8px; }

@media (max-width:520px) {
  .policy { padding:26px 0 52px; }
  .policy-title { font-size:26px; letter-spacing:.5px; }
  .policy-section h2 { font-size:18px; }
}