/* ============================================================
   Blockbench 中文站样式 - www.blockbench.net.cn
   扁平现代专业风 · 品牌色取自官方 logo 深蓝紫
   ============================================================ */

:root {
  --bb-navy: #1c2340;
  --bb-navy-deep: #141930;
  --bb-navy-soft: #262f52;
  --bb-accent: #5865d6;
  --bb-accent-hover: #6d79e0;
  --bb-ink: #1f2430;
  --bb-gray: #5b6272;
  --bb-gray-light: #8a90a0;
  --bb-bg: #ffffff;
  --bb-bg-soft: #f4f5fa;
  --bb-border: #e4e6ef;
  --bb-radius: 10px;
  --bb-shadow: 0 2px 12px rgba(28, 35, 64, 0.08);
  --bb-font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --bb-max: 1160px;
}

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

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

body {
  font-family: var(--bb-font);
  color: var(--bb-ink);
  background: var(--bb-bg);
  line-height: 1.7;
  font-size: 16px;
}

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

a { color: var(--bb-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

ul, ol { padding-left: 1.4em; }

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

.section { padding: 72px 0; }
.section-soft { background: var(--bb-bg-soft); }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.section-head .kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--bb-accent);
  margin-bottom: 10px;
}
.section-head h2 { font-size: 32px; line-height: 1.3; color: var(--bb-navy); }
.section-head p { color: var(--bb-gray); margin-top: 12px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--bb-border);
}
.nav-bar { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand svg { height: 30px; width: auto; }
.brand-mark { display: inline-flex; align-items: center; justify-content: center; }

.nav-links { display: flex; align-items: center; gap: 6px; list-style: none; }
.nav-links a {
  color: var(--bb-ink);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
}
.nav-links a:hover { background: var(--bb-bg-soft); text-decoration: none; color: var(--bb-navy); }
.nav-links a.active { color: var(--bb-accent); }

.nav-cta {
  background: var(--bb-accent);
  color: #fff !important;
  padding: 9px 20px !important;
  border-radius: 6px;
  font-weight: 600;
}
.nav-cta:hover { background: var(--bb-accent-hover) !important; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--bb-navy);
  margin: 5px 0;
  transition: 0.25s;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: background 0.2s, box-shadow 0.2s, transform 0.15s;
  font-family: inherit;
  text-decoration: none !important;
}
.btn-primary { background: var(--bb-accent); color: #fff; box-shadow: 0 4px 14px rgba(88, 101, 214, 0.35); }
.btn-primary:hover { background: var(--bb-accent-hover); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: #fff; border: 1.5px solid rgba(255, 255, 255, 0.45); }
.btn-ghost:hover { border-color: #fff; background: rgba(255, 255, 255, 0.08); }
.btn-outline { background: #fff; color: var(--bb-accent); border: 1.5px solid var(--bb-accent); }
.btn-outline:hover { background: var(--bb-bg-soft); }

.btn .btn-icon { width: 18px; height: 18px; flex: none; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(135deg, var(--bb-navy-deep) 0%, var(--bb-navy) 55%, #2b3462 100%);
  color: #fff;
  padding: 88px 0 96px;
  overflow: hidden;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 56px; align-items: center; }
.hero h1 { font-size: 44px; line-height: 1.25; font-weight: 700; letter-spacing: 0.5px; }
.hero h1 .accent { color: #9aa5ff; }
.hero-sub { font-size: 18px; color: rgba(255, 255, 255, 0.82); margin: 18px 0 32px; max-width: 520px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta { display: flex; gap: 28px; margin-top: 40px; flex-wrap: wrap; }
.hero-meta .stat { }
.hero-meta .stat b { display: block; font-size: 24px; color: #fff; }
.hero-meta .stat span { font-size: 13px; color: rgba(255, 255, 255, 0.65); }
.hero-figure img { border-radius: var(--bb-radius); box-shadow: 0 18px 50px rgba(0, 0, 0, 0.35); }

/* ---------- 徽标条 ---------- */
.logo-strip { background: var(--bb-navy-deep); padding: 26px 0; border-top: 1px solid rgba(255,255,255,0.06); }
.logo-strip .container { display: flex; align-items: center; justify-content: center; gap: 40px; flex-wrap: wrap; }
.logo-strip .label { font-size: 13px; color: rgba(255, 255, 255, 0.5); letter-spacing: 1px; }
.logo-strip .name { color: rgba(255, 255, 255, 0.75); font-weight: 600; font-size: 15px; }

/* ---------- 网格卡片 ---------- */
.grid { display: grid; gap: 24px; }
.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(--bb-border);
  border-radius: var(--bb-radius);
  padding: 28px;
  transition: box-shadow 0.2s, transform 0.15s;
}
.card:hover { box-shadow: var(--bb-shadow); transform: translateY(-2px); }
.card .icon {
  width: 46px;
  height: 46px;
  border-radius: 9px;
  background: rgba(88, 101, 214, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  color: var(--bb-accent);
}
.card .icon svg { width: 24px; height: 24px; }
.card h3 { font-size: 19px; color: var(--bb-navy); margin-bottom: 10px; }
.card p { font-size: 15px; color: var(--bb-gray); }
.card .more { display: inline-block; margin-top: 14px; font-size: 14px; font-weight: 600; }

/* ---------- 场景卡片（带编号） ---------- */
.scene-card { position: relative; overflow: hidden; }
.scene-card .num {
  font-size: 44px;
  font-weight: 800;
  color: rgba(88, 101, 214, 0.14);
  position: absolute;
  top: 10px;
  right: 20px;
  line-height: 1;
}

/* ---------- 优点列表 ---------- */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.feature-row + .feature-row { margin-top: 64px; }
.feature-row.reverse { direction: rtl; }
.feature-row.reverse > * { direction: ltr; }
.feature-row h3 { font-size: 26px; color: var(--bb-navy); margin-bottom: 14px; }
.feature-row p { color: var(--bb-gray); }
.check-list { list-style: none; margin-top: 18px; }
.check-list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 7px 0;
  color: var(--bb-ink);
  font-size: 15px;
}
.check-list svg { width: 19px; height: 19px; color: var(--bb-accent); flex: none; margin-top: 4px; }

/* ---------- 页面横幅 ---------- */
.page-banner {
  background: linear-gradient(135deg, var(--bb-navy-deep) 0%, var(--bb-navy) 60%, #2b3462 100%);
  color: #fff;
  padding: 56px 0;
}
.page-banner h1 { font-size: 34px; }
.page-banner p { color: rgba(255, 255, 255, 0.8); margin-top: 10px; max-width: 680px; }
.breadcrumb { font-size: 13px; color: rgba(255, 255, 255, 0.55); margin-bottom: 14px; }
.breadcrumb a { color: rgba(255, 255, 255, 0.75); }

/* ---------- 下载区 ---------- */
.dl-card { text-align: center; }
.dl-card .os-icon { width: 56px; height: 56px; margin: 0 auto 14px; color: var(--bb-accent); }
.dl-card h3 { font-size: 20px; color: var(--bb-navy); margin-bottom: 6px; }
.dl-card .req { font-size: 13px; color: var(--bb-gray-light); margin-bottom: 18px; }
.dl-card .btn { width: 100%; }

.web-callout {
  margin-top: 40px;
  background: #fff;
  border: 1.5px dashed var(--bb-border);
  border-radius: var(--bb-radius);
  padding: 26px 30px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.web-callout h3 { font-size: 18px; color: var(--bb-navy); }
.web-callout p { font-size: 14px; color: var(--bb-gray); }

.ver-box {
  margin-top: 40px;
  background: #fff;
  border: 1px solid var(--bb-border);
  border-radius: var(--bb-radius);
  overflow: hidden;
}
.ver-box .ver-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding: 18px 24px;
  background: var(--bb-bg-soft);
  border-bottom: 1px solid var(--bb-border);
}
.ver-box .ver-head h3 { font-size: 17px; color: var(--bb-navy); }
.ver-box .ver-head time { font-size: 13px; color: var(--bb-gray-light); }
.ver-box ul { padding: 18px 24px 20px 42px; color: var(--bb-gray); font-size: 14.5px; }
.ver-box li { margin: 4px 0; }

/* ---------- 通用表格 ---------- */
.table-wrap { overflow-x: auto; }
table.data { width: 100%; border-collapse: collapse; background: #fff; border: 1px solid var(--bb-border); border-radius: var(--bb-radius); overflow: hidden; font-size: 14.5px; }
table.data th, table.data td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--bb-border); }
table.data th { background: var(--bb-bg-soft); color: var(--bb-navy); font-weight: 600; white-space: nowrap; }
table.data tr:last-child td { border-bottom: none; }
table.data td .ok { color: #2e9e5b; font-weight: 600; }

/* ---------- FAQ ---------- */
.faq-item { background: #fff; border: 1px solid var(--bb-border); border-radius: var(--bb-radius); margin-bottom: 14px; overflow: hidden; }
.faq-item summary {
  cursor: pointer;
  padding: 18px 22px;
  font-weight: 600;
  color: var(--bb-navy);
  font-size: 16px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; font-size: 20px; color: var(--bb-accent); font-weight: 400; }
.faq-item[open] summary::after { content: "\2212"; }
.faq-item .faq-body { padding: 0 22px 18px; color: var(--bb-gray); font-size: 15px; }

/* ---------- 时间线 ---------- */
.timeline { position: relative; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px; width: 2px; background: var(--bb-border); }
.timeline .tl-item { position: relative; padding: 0 0 26px 16px; }
.timeline .tl-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bb-accent);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--bb-accent);
}
.timeline time { font-size: 13px; font-weight: 700; color: var(--bb-accent); }
.timeline h3 { font-size: 17px; color: var(--bb-navy); margin: 2px 0 4px; }
.timeline p { font-size: 14px; color: var(--bb-gray); }

/* ---------- 步骤 ---------- */
.steps { counter-reset: step; }
.steps .step { position: relative; padding: 0 0 30px 58px; }
.steps .step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bb-accent);
  color: #fff;
  font-weight: 700;
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.steps .step h3 { font-size: 18px; color: var(--bb-navy); margin-bottom: 6px; }
.steps .step p { font-size: 15px; color: var(--bb-gray); }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--bb-navy) 0%, #2b3462 100%);
  color: #fff;
  border-radius: 14px;
  padding: 48px 40px;
  text-align: center;
}
.cta-band h2 { font-size: 28px; margin-bottom: 10px; }
.cta-band p { color: rgba(255, 255, 255, 0.8); margin-bottom: 26px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--bb-navy-deep); color: rgba(255, 255, 255, 0.72); padding: 56px 0 0; font-size: 14px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-grid h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer-grid ul { list-style: none;padding-left: 0;}
.footer-grid li { margin: 8px 0; }
.footer-grid a { color: rgba(255, 255, 255, 0.72); }
.footer-grid a:hover { color: #fff; }
.footer-brand svg { height: 26px; margin-bottom: 14px; }
.footer-desc { max-width: 300px; line-height: 1.8; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 18px 0;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 下载弹窗 ---------- */
.dl-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(20, 25, 48, 0.62);
  backdrop-filter: blur(3px);
  padding: 20px;
}
.dl-modal.open { display: flex; }
.dl-modal-box {
  background: #fff;
  border-radius: 14px;
  max-width: 640px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 32px 34px;
  position: relative;
  animation: modalIn 0.22s ease;
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.dl-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border: none;
  background: var(--bb-bg-soft);
  border-radius: 50%;
  font-size: 18px;
  color: var(--bb-gray);
  cursor: pointer;
  line-height: 1;
}
.dl-close:hover { background: var(--bb-border); color: var(--bb-navy); }
.dl-modal-box h3 { font-size: 22px; color: var(--bb-navy); }
.dl-modal-box .dl-ver { font-size: 13px; color: var(--bb-gray-light); margin: 4px 0 8px; }
.dl-modal-box .dl-note { font-size: 14px; color: var(--bb-gray); margin-bottom: 22px; }
.dl-qrcodes { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.dl-qr {
  border: 1px solid var(--bb-border);
  border-radius: var(--bb-radius);
  padding: 20px 14px;
  text-align: center;
}
.dl-qr .qr-img {
  width: 170px;
  height: 170px;
  margin: 0 auto 12px;
  border: 1.5px dashed var(--bb-gray-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--bb-gray-light);
  font-size: 12px;
  background: var(--bb-bg-soft);
}
.dl-qr .qr-img img { width: 100%; height: 100%; object-fit: contain; border-radius: 6px; }
.dl-qr h4 { font-size: 15px; color: var(--bb-navy); margin-bottom: 2px; }
.dl-qr p { font-size: 13px; color: var(--bb-gray); }
.dl-tip { margin-top: 20px; font-size: 13px; color: var(--bb-gray-light); background: var(--bb-bg-soft); border-radius: 8px; padding: 12px 16px; }

/* ---------- 作品画廊 ---------- */
.gallery-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.gallery-item {
  border: 1px solid var(--bb-border);
  border-radius: var(--bb-radius);
  overflow: hidden;
  background: #fff;
  transition: box-shadow 0.2s, transform 0.15s;
}
.gallery-item:hover { box-shadow: var(--bb-shadow); transform: translateY(-2px); }
.gallery-item figure { margin: 0; background: #212637; }
.gallery-item img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.gallery-item figcaption {
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--bb-navy);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
.gallery-item figcaption .views {
  font-size: 12px;
  font-weight: 400;
  color: var(--bb-gray-light);
  flex: none;
}
.gallery-more { text-align: center; margin-top: 28px; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 36px; }
  .hero { padding: 56px 0 64px; }
  .hero h1 { font-size: 32px; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .feature-row { grid-template-columns: 1fr; gap: 24px; }
  .feature-row.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 12px 20px 18px;
    border-bottom: 1px solid var(--bb-border);
    box-shadow: var(--bb-shadow);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .nav-cta { text-align: center; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 52px 0; }
  .section-head h2 { font-size: 26px; }
  .hero h1 { font-size: 28px; }
  .hero-meta { gap: 18px; }
  .dl-qrcodes { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .dl-modal-box { padding: 24px 20px; }
  .dl-qr .qr-img { width: 150px; height: 150px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .cta-band { padding: 36px 22px; }
  .page-banner h1 { font-size: 27px; }
}