/* ============================================================
   WOG AI — 产品中心首页
   Apple 风格 · 极简 · 高级 · 大量留白
   ============================================================ */

:root {
  --bg: var(--wog-bg);
  --card: var(--wog-surface);
  --text: var(--wog-text);
  --text-2: var(--wog-text-2);
  --border: var(--wog-border);
  --border-strong: var(--wog-border-strong);
  --radius: var(--wog-radius-xl);
  --nav-h: var(--wog-nav-h);
  --font: var(--wog-font);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }

section[id] { scroll-margin-top: calc(var(--nav-h) + 24px); }

/* ---------- 导航 ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  transition: background .25s ease-out, border-color .25s ease-out, backdrop-filter .25s ease-out;
  border-bottom: 1px solid transparent;
}

.site-nav.scrolled {
  background: rgba(245, 245, 247, .72);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border-bottom-color: rgba(0, 0, 0, .06);
}

.nav-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  letter-spacing: -.01em;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--text);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}

.nav-links {
  display: flex;
  gap: 32px;
  font-size: 14px;
}

.nav-links a {
  color: var(--text-2);
  transition: color .2s ease-out;
}

.nav-links a:hover { color: var(--text); }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 登录状态（阶段 4.2） */
.nav-auth {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-user {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 3px 12px 3px 4px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, .6);
  color: inherit;
  text-decoration: none;
}

.nav-user:hover {
  border-color: var(--text-2);
}

.nav-avatar {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--text);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
}

.nav-name {
  font-size: 13px;
  color: var(--text);
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* 按钮 */
/* ⌘K 提示 */
.kbd-hint {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: rgba(255, 255, 255, .6);
  color: var(--text-2);
  font-size: 12px;
  transition: border-color .2s ease-out, color .2s ease-out;
}

.kbd-hint:hover { border-color: var(--text-2); color: var(--text); }

.kbd-hint .kbd { font-weight: 600; }

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px;
  background: none;
  border: none;
}

.nav-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .2s ease-out, opacity .2s ease-out;
}

/* ---------- Hero ---------- */

.hero {
  min-height: calc(100vh - var(--nav-h));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 96px 24px;
}

.hero-inner { text-align: center; max-width: 820px; }

.hero-eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 28px;
}

.hero-title {
  font-size: clamp(44px, 7.5vw, 84px);
  line-height: 1.05;
  letter-spacing: -.03em;
  font-weight: 700;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: clamp(18px, 2.4vw, 24px);
  font-weight: 500;
  color: var(--text);
  margin-bottom: 12px;
}

.hero-cn {
  font-size: 16px;
  color: var(--text-2);
  margin-bottom: 40px;
}

/* ---------- Tools 区域 ---------- */

.tools {
  max-width: 1080px;
  margin: 0 auto;
  padding: 120px 24px;
}

.section-head { text-align: center; margin-bottom: 72px; }

.section-label {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text-2);
  margin-bottom: 14px;
}

.section-title {
  font-size: var(--wog-fs-section);
  font-weight: 700;
  letter-spacing: -.025em;
  margin-bottom: 14px;
}

.section-sub { font-size: 17px; color: var(--text-2); }

.tools-list {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* 产品大卡片 */
.tool-card {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 48px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 56px 48px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .02), 0 12px 32px rgba(0, 0, 0, .04);
  transition: transform .25s ease-out, box-shadow .25s ease-out, border-color .25s ease-out;
}

.tool-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: 0 2px 4px rgba(0, 0, 0, .03), 0 20px 48px rgba(0, 0, 0, .07);
}

.tool-index {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--text-2);
  margin-bottom: 16px;
}

.tool-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: -.02em;
  margin-bottom: 6px;
}

.tool-sub { font-size: 17px; color: var(--text-2); margin-bottom: 14px; }

.tool-role {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 980px;
  padding: 5px 12px;
  margin-bottom: 20px;
}

.tool-desc {
  font-size: 16px;
  color: var(--text-2);
  margin-bottom: 32px;
}

.tool-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
}

.tool-cta .arrow { transition: transform .2s ease-out; display: inline-block; }
.tool-card:hover .tool-cta .arrow { transform: translateX(4px); }

/* 视觉区域：流程 */
.tool-visual {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 32px 28px;
}

.flow { display: flex; flex-direction: column; align-items: stretch; }

.flow-step {
  display: flex;
  align-items: center;
  gap: 14px;
  position: relative;
}

.flow-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--text-2);
  flex: none;
  transition: background .25s ease-out;
}

.tool-card:hover .flow-dot { background: var(--text); }

.flow-label {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .04em;
}

.flow-arrow {
  color: var(--border-strong);
  font-size: 14px;
  padding: 10px 0 10px 24px;
  line-height: 1;
}

/* ---------- About ---------- */

.about {
  max-width: 1080px;
  margin: 0 auto;
  padding: 120px 24px 160px;
}

.about-inner { text-align: center; max-width: 640px; margin: 0 auto; }

.about-title {
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 700;
  letter-spacing: -.025em;
  margin-bottom: 16px;
}

.about-cn { font-size: 17px; font-weight: 500; margin-bottom: 18px; }

.about-body {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.9;
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-brand { display: flex; align-items: center; gap: 8px; font-weight: 600; }

.footer-tagline {
  width: 100%;
  margin-top: 6px;
  font-size: 13px;
  font-weight: 400;
  color: var(--text-2);
}

.footer-links { display: flex; gap: 24px; font-size: 14px; color: var(--text-2); }
.footer-links a { transition: color .2s ease-out; }
.footer-links a:hover { color: var(--text); }

.footer-copy { font-size: 13px; color: var(--text-2); }

/* ---------- 快捷菜单（⌘K） ---------- */

.palette-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, .18);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 16vh 24px 24px;
  animation: fade-in .18s ease-out;
}

/* 修复：hidden 属性需真正隐藏弹层（否则遮罩常驻并拦截所有点击） */
.palette-overlay[hidden] {
  display: none;
}

.palette {
  width: 100%;
  max-width: 460px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: 0 24px 64px rgba(0, 0, 0, .12);
  overflow: hidden;
}

.palette-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 18px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text-2);
  border-bottom: 1px solid var(--border);
}

.palette-esc {
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 1px 8px;
  letter-spacing: .04em;
  text-transform: none;
}

.palette-list { padding: 8px; }

.palette-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  border-radius: 10px;
  font-size: 15px;
  transition: background .15s ease-out;
}

.palette-item:hover, .palette-item:focus {
  background: var(--bg);
  outline: none;
}

.palette-go { color: var(--text-2); font-size: 14px; }

.palette-foot {
  padding: 12px 18px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-2);
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ---------- 滚动显现动画 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .5s ease-out, transform .5s ease-out;
}

.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .tool-card, .btn, .arrow, .flow-dot { transition: none; }
}

/* ---------- 响应式 ---------- */

@media (max-width: 900px) {
  .tool-card {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 32px;
  }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(245, 245, 247, .96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 8px 0;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease-out, transform .2s ease-out;
  }

  .nav-links a {
    padding: 14px 24px;
    font-size: 16px;
    color: var(--text);
  }

  body.menu-open .nav-links {
    opacity: 1;
    transform: none;
    pointer-events: auto;
  }

  .nav-actions .btn-sm { display: none; }
  .kbd-hint { display: none; }
  .nav-toggle { display: flex; }

  .hero { padding: 72px 24px; }
  .tools { padding: 80px 20px; }
  .about { padding: 80px 20px 120px; }

  .tool-card { padding: 32px 24px; }

  .flow-step { gap: 10px; }
  .flow-arrow { padding-left: 18px; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: 16px; }
}

/* ---------- C6.1B：下载中心 ---------- *//* ---------- C6.1B：下载中心 ---------- */
.downloads { padding: 120px 24px 40px; max-width: 1080px; margin: 0 auto; }
.downloads-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.download-card {
  background: var(--wog-surface); border: 1px solid var(--wog-border);
  border-radius: 24px; padding: 30px 30px 24px;
  box-shadow: var(--wog-shadow-sm);
}
.dl-title { font-size: 20px; font-weight: 700; }
.dl-sub { font-size: 14px; color: var(--wog-text-2); font-weight: 500; margin-left: 6px; }
.dl-ver { font-size: 13px; color: var(--wog-text-2); margin: 4px 0 18px; }
.dl-row {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 0; border-top: 1px solid var(--wog-border); flex-wrap: wrap;
}
.dl-os { font-weight: 600; font-size: 14px; min-width: 76px; }
.dl-status { font-size: 11px; font-weight: 700; padding: 3px 9px; border-radius: 999px; letter-spacing: .3px; }
.dl-ok { background: var(--wog-success-bg); color: var(--wog-success); }
.dl-warn { background: var(--wog-warning-bg); color: var(--wog-warning); }
.dl-bad { background: var(--wog-error-bg); color: var(--wog-error); }
.dl-note { font-size: 12.5px; color: var(--wog-text-2); margin-top: 14px; line-height: 1.6; }
.dl-note-inline { font-size: 12.5px; color: var(--wog-text-2); }