/* ============================================================
   MakeWorlds 官网 — 全站样式
   视觉基调参照 Cruip Cube：深藏青底 + 顶部径向辉光 + 居中大标题
   品牌主色：橙 #FF6E00（Cube 的靛紫一律替换为品牌橙）
   ============================================================ */

:root {
  --bg: #0b0e17;
  --bg-raise: #11141f;
  --bg-card: #151929;
  --line: rgba(148, 163, 184, 0.14);
  --line-strong: rgba(148, 163, 184, 0.24);
  --text: #eef1f8;
  --dim: #97a0b5;
  --dim-2: #6b7489;
  --orange: #ff6e00;
  --orange-hi: #ff8a2a;
  --orange-soft: rgba(255, 110, 0, 0.14);
  --violet: #6e63f6;
  --radius: 14px;
  --font: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }

/* ---------------- 顶部辉光（全站共享） ---------------- */
.glow-top {
  position: absolute; top: 0; left: 50%; transform: translateX(-50%);
  width: 1200px; max-width: 100vw; height: 560px; pointer-events: none; z-index: 0;
  background:
    radial-gradient(520px 300px at 32% 8%, rgba(255, 110, 0, 0.20), transparent 68%),
    radial-gradient(560px 320px at 68% 4%, rgba(110, 99, 246, 0.22), transparent 70%);
}

/* ---------------- 导航 ---------------- */
.site-nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 14, 23, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; gap: 36px; height: 68px; position: relative; z-index: 2; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 17px; letter-spacing: 0.01em; }
.brand img { height: 26px; width: 26px; }
.nav-links { display: flex; gap: 26px; font-size: 14.5px; color: var(--dim); }
.nav-links a { transition: color 0.15s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-actions { margin-left: auto; display: flex; align-items: center; gap: 14px; }
.nav-login { font-size: 14.5px; color: var(--dim); transition: color 0.15s; }
.nav-login:hover { color: var(--text); }

.site-nav .nav-panel { display: none; }

.nav-toggle {
  display: none; margin-left: auto; width: 40px; height: 40px;
  background: transparent; border: 1px solid var(--line-strong); border-radius: 8px;
  cursor: pointer; position: relative;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after {
  content: ""; position: absolute; left: 10px; right: 10px; height: 2px;
  background: var(--text); border-radius: 2px; transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle::before { top: 13px; }
.nav-toggle span { top: 19px; }
.nav-toggle::after { top: 25px; }
.site-nav.open .nav-toggle::before { transform: translateY(6px) rotate(45deg); }
.site-nav.open .nav-toggle span { opacity: 0; }
.site-nav.open .nav-toggle::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------------- 按钮 ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 22px; border-radius: 8px; font-size: 14.5px; font-weight: 600;
  border: 1px solid transparent; cursor: pointer; transition: all 0.18s; white-space: nowrap;
}
.btn-primary {
  background: var(--orange); color: #fff;
  box-shadow: 0 6px 24px rgba(255, 110, 0, 0.32);
}
.btn-primary:hover { background: var(--orange-hi); box-shadow: 0 8px 30px rgba(255, 110, 0, 0.42); transform: translateY(-1px); }
.btn-ghost { border-color: var(--line-strong); color: var(--text); background: rgba(255, 255, 255, 0.03); }
.btn-ghost:hover { border-color: var(--orange); color: var(--orange-hi); }
.btn-lg { padding: 14px 30px; font-size: 16px; border-radius: 10px; }
.btn .arrow { transition: transform 0.18s; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------------- Hero ---------------- */
.hero { position: relative; text-align: center; padding: 96px 24px 40px; overflow: hidden; }
.hero > :not(.glow-top):not(.hero-spot) { position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--dim);
  border: 1px solid var(--line-strong); border-radius: 999px;
  padding: 6px 16px; margin-bottom: 28px; background: rgba(255, 255, 255, 0.02);
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 10px var(--orange); }
.hero h1 {
  font-size: clamp(34px, 5.4vw, 60px); line-height: 1.16; font-weight: 800;
  letter-spacing: -0.02em; max-width: 860px; margin: 0 auto;
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--orange) 10%, #ffb25e 90%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { max-width: 660px; margin: 22px auto 38px; font-size: 17.5px; color: var(--dim); }
.hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 13px; color: var(--dim-2); }

/* ---------------- 产品窗口 mock ---------------- */
.app-window {
  max-width: 960px; margin: 64px auto 0; text-align: left;
  border: 1px solid var(--line-strong); border-radius: var(--radius);
  background: linear-gradient(165deg, #171b2b 0%, #0e1220 55%, #0d101c 100%);
  box-shadow:
    0 30px 90px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(255, 255, 255, 0.02) inset,
    0 -40px 120px rgba(110, 99, 246, 0.10);
  overflow: hidden;
}
.app-titlebar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.02);
}
.app-titlebar .mac { width: 11px; height: 11px; border-radius: 50%; }
.app-titlebar .mac.r { background: #ff5f57; }
.app-titlebar .mac.y { background: #febc2e; }
.app-titlebar .mac.g { background: #28c840; }
.app-titlebar .title { margin: 0 auto; font-size: 12.5px; color: var(--dim-2); transform: translateX(-22px); }
.app-body { display: grid; grid-template-columns: 210px 1fr; min-height: 380px; }
.app-side {
  border-right: 1px solid var(--line); padding: 16px 14px;
  background: rgba(255, 255, 255, 0.015); font-size: 12.5px;
}
.app-side .side-label { font-size: 10.5px; letter-spacing: 0.12em; color: var(--dim-2); margin: 14px 6px 8px; text-transform: uppercase; }
.app-side .side-label:first-child { margin-top: 0; }
.app-side li {
  display: flex; align-items: center; gap: 8px; padding: 6px 8px;
  border-radius: 6px; color: var(--dim);
}
.app-side li.on { background: var(--orange-soft); color: var(--orange-hi); }
.app-side li .tick { width: 6px; height: 6px; border-radius: 50%; background: currentColor; opacity: 0.8; }
.app-view { position: relative; display: grid; place-items: center; padding: 20px; overflow: hidden; }
.app-view .grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.06) 1px, transparent 1px);
  background-size: 34px 34px;
  mask-image: radial-gradient(70% 80% at 50% 50%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(70% 80% at 50% 50%, #000 40%, transparent 100%);
}
.app-view img.splat { position: relative; width: 92%; max-width: 560px; }
.view-chip {
  position: absolute; top: 14px; right: 14px;
  font-size: 11px; color: var(--dim); border: 1px solid var(--line-strong);
  background: rgba(11, 14, 23, 0.7); border-radius: 6px; padding: 4px 10px;
}
.view-chip b { color: var(--orange-hi); font-weight: 600; }
.view-status {
  position: absolute; left: 14px; bottom: 12px; display: flex; gap: 14px;
  font-size: 11px; color: var(--dim-2);
}
.view-status b { color: var(--dim); font-weight: 600; }

/* ---------------- 区块通用 ---------------- */
.section { position: relative; padding: 96px 0; }
.section + .section { border-top: 1px solid var(--line); }
.section-head { text-align: center; margin-bottom: 56px; position: relative; }
.section-head .glow-mid {
  position: absolute; left: 50%; top: -70px; transform: translateX(-50%);
  width: min(560px, 100vw); height: 260px; pointer-events: none;
  background: radial-gradient(closest-side, rgba(110, 99, 246, 0.16), transparent 72%);
}
.section-head h2 { font-size: clamp(26px, 3.6vw, 40px); font-weight: 800; letter-spacing: -0.015em; line-height: 1.22; }
.section-head p { color: var(--dim); margin-top: 14px; font-size: 16px; }
.eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: 0.14em;
  color: var(--orange-hi); text-transform: uppercase; margin-bottom: 14px;
}

/* ---------------- 四步工作流 ---------------- */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.flow-step {
  position: relative; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-card); padding: 26px 22px; transition: border-color 0.18s, transform 0.18s;
}
.flow-step:hover { border-color: rgba(255, 110, 0, 0.45); transform: translateY(-3px); }
.flow-no {
  display: inline-grid; place-items: center; width: 38px; height: 38px; border-radius: 50%;
  font-size: 14px; font-weight: 800; color: #fff;
  background: linear-gradient(140deg, var(--orange), #ff9a3d);
  box-shadow: 0 4px 16px rgba(255, 110, 0, 0.35); margin-bottom: 16px;
}
.flow-step h3 { font-size: 16px; margin-bottom: 8px; }
.flow-step p { font-size: 13.5px; color: var(--dim); }
.flow-step .flow-icon { position: absolute; top: 24px; right: 20px; width: 22px; height: 22px; color: var(--dim-2); }

/* ---------------- 能力卡片 ---------------- */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
  border: 1px solid var(--line); border-radius: var(--radius);
  background: linear-gradient(180deg, var(--bg-card), var(--bg-raise));
  padding: 28px 24px; transition: border-color 0.18s, transform 0.18s;
}
.card:hover { border-color: rgba(255, 110, 0, 0.45); transform: translateY(-3px); }
.card-badge {
  width: 46px; height: 46px; border-radius: 50%;
  display: grid; place-items: center; margin-bottom: 20px;
  background: radial-gradient(circle at 32% 28%, rgba(255, 154, 61, 0.55), rgba(255, 110, 0, 0.16) 70%);
  border: 1px solid rgba(255, 110, 0, 0.35);
  box-shadow: 0 0 24px rgba(255, 110, 0, 0.18);
  color: #ffb25e;
}
.card-badge svg { width: 22px; height: 22px; }
.card h3 { font-size: 16.5px; margin-bottom: 10px; }
.card p { font-size: 13.5px; color: var(--dim); margin-bottom: 18px; }
.card-link { font-size: 13.5px; font-weight: 600; color: var(--orange-hi); display: inline-flex; align-items: center; gap: 6px; }
.card-link .arrow { transition: transform 0.18s; }
.card:hover .card-link .arrow { transform: translateX(3px); }

/* ---------------- 精选作品带 ---------------- */
.works { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.work-card {
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
  background: var(--bg-card); transition: border-color 0.18s, transform 0.18s; display: block;
}
.work-card:hover { border-color: rgba(255, 110, 0, 0.45); transform: translateY(-3px); }
.work-thumb { aspect-ratio: 16 / 9; position: relative; overflow: hidden; }
.work-thumb svg { width: 100%; height: 100%; }
.work-body { padding: 18px 20px; }
.work-body h3 { font-size: 15px; margin-bottom: 6px; }
.work-body p { font-size: 13px; color: var(--dim); }
.band-more { text-align: center; margin-top: 36px; }

/* ---------------- 下载带 / 下载卡 ---------------- */
.dl-band {
  position: relative; text-align: center; border: 1px solid var(--line); border-radius: 18px;
  padding: 64px 32px; overflow: hidden;
  background:
    radial-gradient(420px 200px at 50% 0%, rgba(255, 110, 0, 0.12), transparent 70%),
    linear-gradient(180deg, var(--bg-card), var(--bg-raise));
}
.dl-band h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; }
.dl-band > p { color: var(--dim); margin: 14px auto 32px; max-width: 560px; }
.dl-row { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.dl-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.dl-card {
  border: 1px solid var(--line); border-radius: 18px; padding: 36px 32px;
  background: linear-gradient(180deg, var(--bg-card), var(--bg-raise));
  display: flex; flex-direction: column; align-items: flex-start; gap: 0;
  transition: border-color 0.18s;
}
.dl-card:hover { border-color: rgba(255, 110, 0, 0.45); }
.dl-os {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--orange-soft); border: 1px solid rgba(255, 110, 0, 0.35); color: #ffb25e; margin-bottom: 20px;
}
.dl-os svg { width: 26px; height: 26px; }
.dl-card h3 { font-size: 20px; margin-bottom: 8px; }
.dl-meta { font-size: 13px; color: var(--dim-2); margin-bottom: 6px; }
.dl-meta b { color: var(--dim); font-weight: 600; }
.dl-req { font-size: 13.5px; color: var(--dim); margin: 10px 0 24px; }
.dl-card .btn { margin-top: auto; }

/* ---------------- 特性详情（左右交错） ---------------- */
.feat-row {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
  padding: 64px 0;
}
.feat-row + .feat-row { border-top: 1px solid var(--line); }
.feat-row.flip .feat-text { order: 2; }
.feat-row.flip .feat-visual { order: 1; }
.feat-text .eyebrow { margin-bottom: 10px; }
.feat-text h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 800; letter-spacing: -0.01em; margin-bottom: 16px; }
.feat-text p { color: var(--dim); font-size: 15.5px; margin-bottom: 18px; }
.feat-list li { display: flex; gap: 10px; font-size: 14.5px; color: var(--dim); padding: 5px 0; }
.feat-list li::before { content: "—"; color: var(--orange); flex: none; }
.feat-visual {
  border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  background: linear-gradient(165deg, #171b2b, #0e1220);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  min-height: 300px; display: grid; place-items: center; position: relative;
}
.feat-visual img { width: 88%; }
.feat-visual .grid-bg {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(148, 163, 184, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148, 163, 184, 0.06) 1px, transparent 1px);
  background-size: 30px 30px;
  mask-image: radial-gradient(75% 85% at 50% 50%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(75% 85% at 50% 50%, #000 40%, transparent 100%);
}
.feat-visual .fv-label {
  position: absolute; bottom: 14px; left: 16px; font-size: 11.5px; color: var(--dim-2);
  border: 1px solid var(--line-strong); border-radius: 6px; padding: 3px 10px;
  background: rgba(11, 14, 23, 0.7);
}

/* ---------------- 规格表 ---------------- */
.spec-table { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.spec-table th, .spec-table td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.spec-table th { color: var(--dim-2); font-size: 12.5px; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; }
.spec-table td:first-child { color: var(--dim); width: 200px; }
.spec-wrap { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--bg-card); }

/* ---------------- 文档索引 ---------------- */
.doc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.doc-card {
  display: flex; gap: 16px; align-items: flex-start;
  border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-card); padding: 24px 22px; transition: border-color 0.18s, transform 0.18s;
}
.doc-card:hover { border-color: rgba(255, 110, 0, 0.45); transform: translateY(-2px); }
.doc-icon {
  flex: none; width: 40px; height: 40px; border-radius: 10px; display: grid; place-items: center;
  background: var(--orange-soft); border: 1px solid rgba(255, 110, 0, 0.3); color: #ffb25e;
}
.doc-icon svg { width: 19px; height: 19px; }
.doc-card h3 { font-size: 15px; margin-bottom: 6px; }
.doc-card p { font-size: 13px; color: var(--dim); }

/* ---------------- FAQ 手风琴 ---------------- */
.faq-list { max-width: 780px; margin: 0 auto; }
.faq-item { border: 1px solid var(--line); border-radius: 12px; background: var(--bg-card); margin-bottom: 12px; overflow: hidden; }
.faq-item summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 14px;
  padding: 20px 22px; font-size: 15.5px; font-weight: 600; transition: color 0.15s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--orange-hi); }
.faq-item summary .chev {
  margin-left: auto; flex: none; width: 18px; height: 18px; color: var(--dim);
  transition: transform 0.2s;
}
.faq-item[open] summary .chev { transform: rotate(180deg); color: var(--orange-hi); }
.faq-item .faq-a { padding: 0 22px 22px; font-size: 14.5px; color: var(--dim); }
.faq-item .faq-a p + p { margin-top: 10px; }
.faq-item .faq-a a { color: var(--orange-hi); font-weight: 600; }
.faq-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 40px; max-width: 100%; }
.faq-cols .faq-item { margin-bottom: 0; }

/* ---------------- CTA ---------------- */
.cta-band {
  position: relative; text-align: center; border: 1px solid var(--line); border-radius: 20px;
  padding: 72px 32px; overflow: hidden;
  background:
    radial-gradient(480px 220px at 50% 110%, rgba(255, 110, 0, 0.18), transparent 70%),
    linear-gradient(180deg, var(--bg-card), var(--bg-raise));
}
.cta-band h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; letter-spacing: -0.015em; }
.cta-band p { color: var(--dim); margin: 16px auto 32px; max-width: 520px; }

/* ---------------- 页脚 ---------------- */
.site-footer { border-top: 1px solid var(--line); padding: 64px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
.footer-brand img { height: 30px; width: 30px; margin-bottom: 16px; }
.footer-brand p { font-size: 13.5px; color: var(--dim-2); max-width: 260px; }
.footer-col h4 { font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--dim-2); margin-bottom: 16px; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { font-size: 14px; color: var(--dim); transition: color 0.15s; }
.footer-col a:hover { color: var(--text); }
.footer-bottom {
  margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: var(--dim-2);
}

/* ---------------- 页面级页头（子页 hero 缩小版） ---------------- */
.page-hero { position: relative; text-align: center; padding: 88px 24px 64px; overflow: hidden; }
.page-hero > :not(.glow-top) { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(30px, 4.4vw, 48px); font-weight: 800; letter-spacing: -0.02em; }
.page-hero p { color: var(--dim); max-width: 620px; margin: 16px auto 0; font-size: 16.5px; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .doc-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 860px) {
  .nav-links, .nav-actions .nav-login, .nav-actions .lang-dd { display: none; }
  .nav-toggle { display: block; flex: none; }
  .nav-inner { gap: 16px; }
  .nav-actions { margin-left: 0; }
  .site-nav .nav-panel {
    display: none; position: absolute; left: 0; right: 0; top: 68px;
    background: #0b0e17; border-bottom: 1px solid var(--line);
    padding: 12px 24px 20px; z-index: 49;
  }
  .site-nav.open .nav-panel { display: block; }
  .nav-panel a { display: block; padding: 12px 4px; font-size: 15px; color: var(--dim); border-bottom: 1px solid var(--line); }
  .nav-panel a:last-child { border-bottom: none; }
  .nav-panel a:hover { color: var(--text); }
  .feat-row { grid-template-columns: 1fr; gap: 32px; padding: 48px 0; }
  .feat-row.flip .feat-text { order: 1; }
  .feat-row.flip .feat-visual { order: 2; }
  .dl-cards { grid-template-columns: 1fr; }
  .faq-cols { grid-template-columns: 1fr; }
  .app-body { grid-template-columns: 1fr; }
  .app-side { display: none; }
}

@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .works, .cards, .flow, .doc-grid { grid-template-columns: 1fr; }
  .hero { padding: 72px 20px 32px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; }
  .dl-band, .cta-band { padding: 48px 20px; }
  .spec-table td:first-child { width: auto; }
}

/* 窄屏 nav：英文 CTA 较长，缩小按钮并隐藏箭头，避免汉堡按钮被挤出视口 */
@media (max-width: 480px) {
  .nav-inner { gap: 12px; }
  .brand { font-size: 15.5px; }
  .nav-actions .btn { padding: 8px 14px; font-size: 13px; }
  .nav-actions .btn .arrow { display: none; }
}

/* ============================================================
   灵动效果（全部走 transform / opacity，不触发 layout）
   ============================================================ */

/* hero 入场：依次淡入上滑 */
@keyframes heroIn {
  from { opacity: 0; transform: translateY(22px); }
  to { opacity: 1; transform: none; }
}
@keyframes heroFade {
  from { opacity: 0; }
  to { opacity: 1; }
}
.hero-badge, .hero h1, .hero-sub, .hero-ctas, .hero-note {
  animation: heroIn 0.8s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}
.hero h1 { animation-delay: 0.08s; }
.hero-sub { animation-delay: 0.16s; }
.hero-ctas { animation-delay: 0.24s; }
.hero-note { animation-delay: 0.32s; }
/* 产品窗口仅淡入（transform 留给鼠标视差，避免 forwards 填充冲突） */
.app-window { animation: heroFade 1.1s ease 0.3s both; }

/* hero 点云：缓慢漂浮 + 呼吸 */
@keyframes splatFloat {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-12px) scale(1.02); }
}
.app-view img.splat { animation: splatFloat 7s ease-in-out infinite; will-change: transform; }

/* 顶部辉光：缓慢漂移 */
@keyframes glowDrift {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-47%) translateY(16px); }
}
.glow-top { animation: glowDrift 18s ease-in-out infinite; will-change: transform; }

/* hero 大标题渐变文字：缓慢流动 */
@keyframes gradFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}
.hero h1 em { background-size: 220% 100%; animation: gradFlow 7s ease-in-out infinite; }

/* 主按钮：hover 光泽扫过（加宽加亮，确保肉眼可见） */
.btn-primary { position: relative; overflow: hidden; }
.btn-primary::after {
  content: ""; position: absolute; top: -10%; left: -80%; width: 60%; height: 120%;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.42), transparent);
  transform: skewX(-20deg); transition: left 0.65s ease; pointer-events: none;
}
.btn-primary:hover::after { left: 125%; }

/* 滚动入场：淡入上滑，位移 28px / 0.75s（site.js 只加类不删类；
   hover 过渡定义在下方更靠后的位置，确保悬停时覆盖入场过渡） */
.reveal { opacity: 0; transform: translateY(28px); }
.reveal.revealed {
  opacity: 1; transform: translateY(0);
  transition:
    opacity 0.75s cubic-bezier(0.22, 0.61, 0.36, 1) var(--reveal-delay, 0s),
    transform 0.75s cubic-bezier(0.22, 0.61, 0.36, 1) var(--reveal-delay, 0s);
  will-change: opacity, transform;
}

/* 卡片 hover：明显上浮 + 橙色描边外发光 + 图标徽章放大 */
.card, .flow-step, .work-card, .doc-card, .dl-card {
  transition: border-color 0.18s, transform 0.18s, box-shadow 0.25s;
}
.card:hover, .flow-step:hover, .work-card:hover, .doc-card:hover, .dl-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 110, 0, 0.6);
  box-shadow: 0 0 0 1px rgba(255, 110, 0, 0.5), 0 12px 40px rgba(255, 110, 0, 0.15);
  transition: border-color 0.18s, transform 0.18s, box-shadow 0.25s;
}
.card-badge, .dl-os, .doc-icon { transition: transform 0.2s, background 0.2s; }
.card:hover .card-badge {
  transform: scale(1.1);
  background: radial-gradient(circle at 32% 28%, rgba(255, 154, 61, 0.8), rgba(255, 110, 0, 0.32) 70%);
}

/* hero 鼠标探照光斑（桌面档，JS 驱动 transform 平滑跟随） */
.hero-spot {
  position: absolute; left: 0; top: 0; z-index: 2;
  width: 520px; height: 520px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 26, 0.30) 0%, rgba(255, 110, 0, 0.12) 42%, transparent 68%);
  mix-blend-mode: screen;
  pointer-events: none; opacity: 0; transition: opacity 0.5s;
  will-change: transform; display: none;
}
@media (min-width: 861px) { .hero-spot { display: block; } }
.hero-spot.on { opacity: 1; }

/* 回到顶部：右下角悬浮圆钮，滚动超过 600px 淡入 */
.back-top {
  position: fixed; right: 24px; bottom: 24px; z-index: 60;
  width: 44px; height: 44px; border-radius: 50%; border: none; cursor: pointer;
  background: var(--orange); color: #fff;
  display: grid; place-items: center;
  box-shadow: 0 6px 20px rgba(255, 110, 0, 0.38);
  opacity: 0; transform: translateY(12px); pointer-events: none;
  transition: opacity 0.3s, transform 0.3s, background 0.15s;
}
.back-top.show { opacity: 1; transform: none; pointer-events: auto; }
.back-top:hover { background: var(--orange-hi); }
.back-top svg { width: 20px; height: 20px; }
@media (max-width: 640px) {
  .back-top { right: 16px; bottom: 16px; width: 40px; height: 40px; }
}

/* 三列卡片变体（下载页「上手无忧」）；定义位置在响应式规则之后，需自带降级 */
.cards-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 640px) { .cards-3 { grid-template-columns: 1fr; } }

/* 「为什么本地训练」对照区块：本地侧品牌橙强调，在线侧灰色弱化 */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.compare-col {
  border: 1px solid var(--line); border-radius: 18px; padding: 32px 30px;
  background: linear-gradient(180deg, var(--bg-card), var(--bg-raise));
  transition: border-color 0.18s, transform 0.18s, box-shadow 0.25s;
}
.compare-col h3 {
  display: flex; align-items: center; gap: 10px;
  font-size: 17px; margin-bottom: 20px;
}
.compare-col .compare-mark { width: 22px; height: 22px; }
.compare-col.local {
  border-color: rgba(255, 110, 0, 0.55);
  box-shadow: 0 0 0 1px rgba(255, 110, 0, 0.22), 0 16px 48px rgba(255, 110, 0, 0.10);
}
.compare-col.local h3 { color: var(--orange-hi); }
.compare-col.cloud { opacity: 0.72; }
.compare-col.cloud h3 { color: var(--dim); }
.compare-cloud-ic { font-size: 20px; line-height: 1; }
.compare-row {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 15px 0; border-top: 1px solid var(--line);
}
.compare-row .mark {
  flex: none; width: 22px; height: 22px; border-radius: 50%;
  display: grid; place-items: center; font-size: 12.5px; font-weight: 700; margin-top: 1px;
}
.compare-col.local .mark { background: var(--orange-soft); color: var(--orange-hi); border: 1px solid rgba(255, 110, 0, 0.4); }
.compare-col.cloud .mark { background: rgba(148, 163, 184, 0.08); color: var(--dim-2); border: 1px solid var(--line); }
.compare-row b { font-size: 15px; }
.compare-row p { font-size: 13px; color: var(--dim); margin-top: 3px; }
.compare-col.cloud .compare-row b { color: var(--dim); }
.compare-note { text-align: center; margin-top: 26px; font-size: 13px; color: var(--dim-2); }
.compare-col:hover {
  transform: translateY(-6px);
  box-shadow: 0 0 0 1px rgba(255, 110, 0, 0.35), 0 12px 40px rgba(255, 110, 0, 0.12);
  border-color: rgba(255, 110, 0, 0.6);
}
@media (max-width: 860px) { .compare { grid-template-columns: 1fr; } }

/* 语言切换：nav 图标按钮 + hover 下拉面板（深色玻璃拟态） */
.lang-dd { position: relative; }
.lang-dd-btn {
  width: 36px; height: 36px; border-radius: 8px; display: grid; place-items: center;
  background: transparent; border: 1px solid transparent; color: var(--dim); cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.lang-dd-btn:hover, .lang-dd:focus-within .lang-dd-btn {
  color: var(--orange-hi); border-color: var(--line-strong); background: rgba(255, 255, 255, 0.03);
}
.lang-dd-btn svg { width: 19px; height: 19px; }
/* 按钮与面板之间的隐形桥接区，hover 滑向面板途中不掉出 */
.lang-dd::before { content: ""; position: absolute; top: 100%; left: -8px; right: -8px; height: 12px; }
.lang-dd-panel {
  position: absolute; top: calc(100% + 8px); right: 0; min-width: 172px; z-index: 70;
  background: rgba(17, 20, 31, 0.92);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line-strong); border-radius: 12px; padding: 6px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  /* 收起时 visibility 延迟 200ms：滑向面板途中的宽限 */
  transition: opacity 0.18s, transform 0.18s, visibility 0s 0.2s;
}
.lang-dd:hover .lang-dd-panel, .lang-dd:focus-within .lang-dd-panel {
  opacity: 1; visibility: visible; transform: none;
  transition: opacity 0.18s, transform 0.18s, visibility 0s;
}
.lang-dd-panel button {
  display: flex; align-items: baseline; gap: 10px; width: 100%;
  padding: 9px 12px; border: none; border-radius: 8px; background: transparent;
  color: var(--dim); font-size: 13.5px; font-family: var(--font); cursor: pointer;
  text-align: left; transition: background 0.15s, color 0.15s;
}
.lang-dd-panel button:hover { background: rgba(255, 255, 255, 0.05); color: var(--text); }
.lang-dd-panel button .code { font-size: 11px; letter-spacing: 0.08em; color: var(--dim-2); width: 22px; flex: none; }
.lang-dd-panel button.active { background: var(--orange-soft); color: var(--orange-hi); }
.lang-dd-panel button.active .code { color: var(--orange-hi); }

/* 登录态头像 + 点击浮层（与语言面板同风格） */
.user-dd { position: relative; }
.user-dd-btn {
  width: 36px; height: 36px; padding: 0; border: none; border-radius: 50%;
  background: transparent; cursor: pointer; display: grid; place-items: center;
  transition: box-shadow 0.15s;
}
.user-dd-btn:hover, .user-dd.open .user-dd-btn { box-shadow: 0 0 0 2px rgba(255, 110, 0, 0.55); }
.user-dd-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(140deg, var(--orange), #ff9a3d);
  color: #fff; font-size: 15px; font-weight: 800;
  display: grid; place-items: center;
  box-shadow: 0 4px 14px rgba(255, 110, 0, 0.35);
}
.user-dd-panel {
  position: absolute; top: calc(100% + 10px); right: 0; min-width: 200px; z-index: 70;
  background: rgba(17, 20, 31, 0.92);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--line-strong); border-radius: 12px; padding: 6px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity 0.18s, transform 0.18s, visibility 0s;
}
.user-dd.open .user-dd-panel { opacity: 1; visibility: visible; transform: none; }
.user-dd-email {
  padding: 10px 12px; font-size: 13px; color: var(--text);
  border-bottom: 1px solid var(--line); margin-bottom: 4px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.user-dd-item {
  display: block; padding: 9px 12px; border-radius: 8px;
  font-size: 13.5px; color: var(--dim); transition: background 0.15s, color 0.15s;
}
.user-dd-item:hover { background: rgba(255, 255, 255, 0.05); color: var(--text); }
.user-dd-item:last-child:hover { color: var(--orange-hi); }

/* 移动端汉堡面板内的登录态区块 */
.nav-user { padding: 12px 4px 4px; border-bottom: 1px solid var(--line); }
.nav-user-email {
  font-size: 13px; color: var(--dim-2); padding-bottom: 8px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}

/* 语言切换胶囊（移动端汉堡面板内） */
.lang-switch {
  display: inline-flex; border: 1px solid var(--line-strong); border-radius: 999px;
  overflow: hidden; background: rgba(255, 255, 255, 0.03);
}
.lang-switch button {
  padding: 6px 13px; font-size: 12.5px; font-weight: 600; font-family: var(--font);
  background: transparent; border: none; color: var(--dim); cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.lang-switch button:hover { color: var(--text); }
.lang-switch button.active { background: var(--orange); color: #fff; }
.lang-switch-panel { margin-top: 16px; }
.lang-switch-panel button { padding: 9px 18px; font-size: 13.5px; }

/* 减弱动效偏好：全部动画降级为瞬时，并关闭平滑滚动 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}