/* ==========================================================================
   NanaZip 中文站样式 - www.nanazip.net.cn
   品牌色取自官方 logo：主蓝 #0080E0 / 深蓝 #004578
   浅色主题 · 扁平现代专业风 · 无 emoji 图标
   ========================================================================== */

:root {
  --brand: #0080e0;
  --brand-dark: #0068c0;
  --brand-deep: #004578;
  --brand-soft: #e8f4fc;
  --brand-softer: #f4f9fe;
  --ink: #1c2530;
  --ink-2: #3d4a5c;
  --ink-3: #66788c;
  --line: #e3e9f0;
  --bg: #ffffff;
  --bg-alt: #f6f9fc;
  --ok: #0f8a4d;
  --radius: 10px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(16, 40, 72, .08), 0 8px 24px rgba(16, 40, 72, .06);
  --shadow-lg: 0 4px 12px rgba(16, 40, 72, .10), 0 20px 48px rgba(16, 40, 72, .12);
  --maxw: 1120px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
}

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

a { color: var(--brand-dark); text-decoration: none; }
a:hover { color: var(--brand); }

ul, ol { padding-left: 1.25em; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; gap: 32px;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; color: var(--ink); }
.brand img { width: 32px; height: 32px; }
.brand:hover { color: var(--brand-dark); }
.nav > nav { margin-left: auto; }
.nav-links { display: flex; align-items: center; gap: 10px; list-style: none; padding: 0; }
.nav-links a {
  display: block; padding: 8px 14px; border-radius: 8px;
  color: var(--ink-2); font-size: 15px; font-weight: 500; white-space: nowrap;
}
.nav-links a:hover { background: var(--brand-soft); color: var(--brand-dark); }
.nav-links a[aria-current="page"] { color: var(--brand-dark); font-weight: 700; }
.nav-cta {
  background: var(--brand); color: #fff !important; padding: 9px 20px !important;
  border-radius: 8px; font-weight: 600;
}
.nav-cta:hover { background: var(--brand-dark); color: #fff !important; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
/* 移动端：nav 容器不再右推，toggle 靠右 */
@media (max-width: 720px) {
  .nav > nav { margin-left: 0; }
  .nav-toggle { margin-left: auto; }
}
.nav-toggle svg { display: block; width: 24px; height: 24px; stroke: var(--ink); }

/* ---------- Hero ---------- */
.hero { padding: 88px 0 72px; background:
  radial-gradient(720px 320px at 82% -8%, rgba(0, 128, 224, .10), transparent 70%),
  radial-gradient(560px 280px at 8% 108%, rgba(0, 128, 224, .07), transparent 70%),
  var(--bg);
}
.hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 56px; align-items: center; }
.hero h1 { font-size: 42px; line-height: 1.25; font-weight: 800; letter-spacing: -.5px; }
.hero h1 .accent { color: var(--brand); }
.hero .sub { margin-top: 18px; font-size: 18px; color: var(--ink-3); max-width: 34em; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; list-style: none; padding: 0; }
.hero-badges li {
  font-size: 13px; font-weight: 600; color: var(--brand-deep);
  background: var(--brand-soft); border: 1px solid #cfe6f8;
  padding: 4px 12px; border-radius: 999px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; }
.hero-stats { display: flex; gap: 40px; margin-top: 40px; padding-top: 26px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.hero-stats .stat b { display: block; font-size: 26px; color: var(--brand-dark); font-weight: 800; }
.hero-stats .stat span { font-size: 13px; color: var(--ink-3); }

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 30px; border-radius: 10px; font-size: 16px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; font-family: inherit;
  transition: background .15s ease, color .15s ease, border-color .15s ease;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); color: #fff; }
.btn-ghost { background: #fff; color: var(--brand-dark); border-color: var(--brand); }
.btn-ghost:hover { background: var(--brand-soft); }
.btn-lg { padding: 15px 36px; font-size: 17px; }
.btn svg { width: 18px; height: 18px; }

/* Hero 插图 */
.hero-visual { position: relative; }

/* ---------- 通用区块 ---------- */
.section { padding: 76px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { max-width: 720px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.kicker {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .12em;
  color: var(--brand-dark); text-transform: uppercase; margin-bottom: 10px;
}
.section-head h2 { font-size: 32px; line-height: 1.3; font-weight: 800; letter-spacing: -.3px; }
.section-head p { margin-top: 12px; color: var(--ink-3); font-size: 16.5px; }

/* 卡片网格 */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg);
  padding: 28px; box-shadow: var(--shadow);
}
.card h3 { font-size: 18px; font-weight: 700; margin: 14px 0 8px; }
.card p { color: var(--ink-3); font-size: 15px; }
.card .icon {
  width: 46px; height: 46px; border-radius: 12px;
  background: var(--brand-soft); color: var(--brand-dark);
  display: flex; align-items: center; justify-content: center;
}
.card .icon svg { width: 24px; height: 24px; }
.card ul { margin-top: 10px; color: var(--ink-3); font-size: 14.5px; }
.card ul li { margin: 4px 0; }

/* ---------- 场景条 ---------- */
.scene-row {
  display: grid; grid-template-columns: 52px 1fr auto; gap: 18px; align-items: center;
  padding: 20px 24px; border: 1px solid var(--line); border-radius: var(--radius);
  background: #fff; box-shadow: var(--shadow);
}
.scene-row .num {
  font-size: 22px; font-weight: 800; color: var(--brand);
  background: var(--brand-soft); border-radius: 10px;
  width: 52px; height: 52px; display: flex; align-items: center; justify-content: center;
}
.scene-row h3 { font-size: 16.5px; font-weight: 700; }
.scene-row p { font-size: 14.5px; color: var(--ink-3); }
.scenes { display: grid; gap: 14px; }

/* ---------- 格式标签 ---------- */
.format-tags { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; }
.format-tags li {
  background: #fff; border: 1px solid var(--line); border-radius: 8px;
  padding: 8px 14px; font-size: 14px; font-weight: 600; color: var(--ink-2);
  font-family: Consolas, "SF Mono", monospace;
}
.format-tags li.ext { border-color: #bfe0f7; background: var(--brand-soft); color: var(--brand-deep); }

/* ---------- 表格 ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
thead th {
  text-align: left; background: var(--bg-alt); color: var(--ink-2);
  font-weight: 700; padding: 12px 16px; border-bottom: 1px solid var(--line); white-space: nowrap;
}
tbody td { padding: 12px 16px; border-bottom: 1px solid var(--line); color: var(--ink-2); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
td.mono, .mono { font-family: Consolas, "SF Mono", monospace; font-size: 13px; word-break: break-all; }

/* ---------- 面包屑 ---------- */
.breadcrumb { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; padding: 18px 0 0; font-size: 13.5px; color: var(--ink-3); }
.breadcrumb li:not(:last-child)::after { content: "/"; margin-left: 6px; color: #b3c0cd; }
.breadcrumb a { color: var(--ink-3); }
.breadcrumb a:hover { color: var(--brand-dark); }

/* ---------- 页头（内页） ---------- */
.page-head { padding: 46px 0 10px; }
.page-head h1 { font-size: 36px; font-weight: 800; letter-spacing: -.4px; }
.page-head .lead { margin-top: 12px; color: var(--ink-3); font-size: 17px; max-width: 46em; }

/* ---------- 下载卡片 ---------- */
.dl-card {
  border: 1px solid var(--line); border-radius: var(--radius-lg); background: #fff;
  padding: 30px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 6px;
}
.dl-card.featured { border: 2px solid var(--brand); position: relative; }
.dl-card .tag {
  position: absolute; top: -13px; left: 26px; background: var(--brand); color: #fff;
  font-size: 12px; font-weight: 700; padding: 3px 12px; border-radius: 999px; letter-spacing: .05em;
}
.dl-card h3 { font-size: 19px; font-weight: 800; }
.dl-card .ver { font-size: 13.5px; color: var(--ink-3); }
.dl-card ul { list-style: none; padding: 0; margin: 14px 0 20px; flex: 1; }
.dl-card ul li { font-size: 14.5px; color: var(--ink-2); padding: 5px 0 5px 24px; position: relative; }
.dl-card ul li::before {
  content: ""; position: absolute; left: 2px; top: 12px; width: 8px; height: 8px;
  border-radius: 2px; background: var(--brand);
}
.dl-card .btn { width: 100%; }
.meta-note { font-size: 13px; color: var(--ink-3); margin-top: 10px; }

/* ---------- 步骤 ---------- */
.steps { counter-reset: step; display: grid; gap: 18px; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 18px; align-items: start; }
.step::before {
  counter-increment: step; content: counter(step);
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--brand); color: #fff; font-weight: 800; font-size: 18px;
  display: flex; align-items: center; justify-content: center;
}
.step h3 { font-size: 17px; font-weight: 700; }
.step p, .step div { color: var(--ink-3); font-size: 15px; margin-top: 4px; }
.step code {
  background: var(--bg-alt); border: 1px solid var(--line); border-radius: 6px;
  padding: 2px 8px; font-size: 13.5px; color: var(--brand-deep);
}

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 12px; }
.faq details { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); }
.faq summary {
  cursor: pointer; padding: 16px 20px; font-weight: 600; font-size: 15.5px;
  list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 20px; color: var(--brand); font-weight: 700; flex: none; }
.faq details[open] summary::after { content: "−"; }
.faq details .faq-body { padding: 0 20px 18px; color: var(--ink-3); font-size: 15px; }
.faq details .faq-body p { margin: 6px 0; }

/* ---------- 提示框 ---------- */
.note {
  border-left: 4px solid var(--brand); background: var(--brand-softer);
  border-radius: 8px; padding: 14px 18px; font-size: 14.5px; color: var(--ink-2);
}
.note b { color: var(--brand-deep); }

/* ---------- 页脚 ---------- */
.site-footer { background: #0e1c2b; color: #9db2c8; margin-top: 40px; }
.footer-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 36px; padding: 52px 0 40px;
}
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 700; font-size: 18px; margin-bottom: 14px; }
.footer-brand img { width: 30px; height: 30px; }
.site-footer p { font-size: 13.5px; line-height: 1.8; }
.site-footer h4 { color: #fff; font-size: 14px; margin-bottom: 14px; letter-spacing: .05em; }
.footer-links { list-style: none; padding: 0; }
.footer-links li { margin: 8px 0; }
.footer-links a { color: #9db2c8; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid #1d3247; padding: 20px 0; font-size: 13px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}

/* ---------- 下载弹窗 ---------- */
.dl-modal {
  position: fixed; inset: 0; z-index: 200; display: none;
  align-items: center; justify-content: center; padding: 24px;
}
.dl-modal.open { display: flex;left: 0px;
    right: 0px;
    top: 0px;
    bottom: 0px;}
  button { outline: none } 
.dl-modal-backdrop { position: absolute; inset: 0; background: rgba(10, 24, 40, .55); }
.dl-modal-box {
  position: relative; background: #fff; border-radius: var(--radius-lg);
  width: 100%; max-width: 640px; box-shadow: var(--shadow-lg);
  padding: 34px 34px 28px; text-align: center;
}
.dl-modal-close {
  position: absolute; top: 14px; right: 14px; width: 34px; height: 34px;
  border: 0; background: var(--bg-alt); border-radius: 50%; cursor: pointer;
  font-size: 18px; color: var(--ink-3); line-height: 1;
}
.dl-modal-close:hover { background: var(--brand-soft); color: var(--brand-dark); }
.dl-modal-box h3 { font-size: 21px; font-weight: 800; margin-top: 6px; }
.dl-modal-box .dl-modal-ver { font-size: 13.5px; color: var(--ink-3); margin-top: 4px; }
.dl-modal-box .dl-modal-desc { font-size: 14.5px; color: var(--ink-3); margin: 12px 0 22px; }
.qr-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.qr-item {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 14px 16px;
  background: var(--bg-alt);
}
.qr-item img { width: 168px; height: 168px; margin: 0 auto; border-radius: 8px; background: #fff; padding: 8px; border: 1px solid var(--line); }
.qr-item .qr-name { margin-top: 12px; font-size: 14px; font-weight: 700; color: var(--ink); }
.qr-item .qr-tip { font-size: 12.5px; color: var(--ink-3); }
.dl-modal-foot { margin-top: 20px; font-size: 12.5px; color: var(--ink-3); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 56px 0 52px; }
  .hero h1 { font-size: 33px; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: stretch; gap: 0; padding: 10px 16px 16px;
    box-shadow: var(--shadow);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 10px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 54px 0; }
  .section-head h2 { font-size: 26px; }
  .page-head h1 { font-size: 28px; }
  .hero-stats { gap: 26px; }
  .qr-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
}