/* ============================================================
   PC 布局扩展层(基于 ios.css 设计 token)
   ============================================================ */

/* -------- App shell 改写为 PC -------- */
.app {
  max-width: none;
  margin: 0;
  padding-bottom: 0;
  min-height: 100vh;
  background: var(--bg-grouped);
  overflow-x: hidden;
}
.app--no-tab { padding-bottom: 0; }
.tabbar { display: none !important; }

/* 容器 */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow { max-width: 1080px; margin: 0 auto; padding: 0 32px; }
.container-wide { max-width: 1440px; margin: 0 auto; padding: 0 32px; }

/* -------- Top Navigation -------- */
.topnav {
  position: sticky; top: 0; z-index: 80;
  width: 100%;
  height: 64px;
  background: rgba(252,252,253,0.78);
  backdrop-filter: saturate(180%) blur(28px);
  -webkit-backdrop-filter: saturate(180%) blur(28px);
  border-bottom: 0.5px solid var(--separator);
}
.topnav__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 36px;
}
.topnav__brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 700;
  color: var(--label-primary);
  letter-spacing: -0.4px;
  text-decoration: none;
}
.topnav__brand-mark {
  width: 32px; height: 32px;
  border-radius: 9px;
  background: linear-gradient(135deg, #007AFF 0%, #5856D6 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px rgba(0,122,255,0.35);
}
.topnav__links {
  flex: 1;
  display: flex;
  gap: 8px;
}
.topnav__link {
  position: relative;
  padding: 8px 14px;
  border-radius: var(--r-md);
  color: var(--label-primary);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--dur-fast), background var(--dur-fast);
}
.topnav__link:hover { background: var(--fill-quaternary); }
.topnav__link.is-active {
  color: var(--ios-blue);
  background: rgba(0,122,255,0.08);
}
.topnav__actions { display: flex; align-items: center; gap: 8px; }
.topnav__icon-btn {
  position: relative;
  width: 38px; height: 38px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--label-primary);
  background: transparent;
  transition: background var(--dur-fast), transform var(--dur-fast);
}
.topnav__icon-btn:hover { background: var(--fill-quaternary); }
.topnav__icon-btn:active { transform: scale(0.92); }
.topnav__icon-btn .badge {
  position: absolute; top: 4px; right: 4px;
}
.topnav__avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #007AFF, #5856D6);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 600; font-size: 14px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--dur-fast), border-color var(--dur-fast);
}
.topnav__avatar:hover { transform: scale(1.06); border-color: var(--ios-blue); }

/* 用户下拉菜单 */
.user-dropdown {
  position: absolute;
  top: 56px; right: 32px;
  width: 220px;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(24px);
  border-radius: 14px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.15);
  padding: 8px;
  display: none;
  z-index: 90;
  border: 0.5px solid var(--separator);
  animation: dd-pop var(--dur-base) var(--ease-spring);
}
.user-dropdown.is-show { display: block; }
@keyframes dd-pop {
  from { opacity: 0; transform: translateY(-8px) scale(0.96); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.user-dropdown__header {
  padding: 10px 12px;
  border-bottom: 0.5px solid var(--separator);
  margin-bottom: 4px;
}
.user-dropdown__item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  border-radius: 9px;
  color: var(--label-primary);
  font-size: 14px;
  text-decoration: none;
  transition: background var(--dur-fast);
  cursor: pointer;
}
.user-dropdown__item:hover { background: var(--fill-quaternary); }
.user-dropdown__item--destructive { color: var(--ios-red); }
.user-dropdown__sep { height: 0.5px; background: var(--separator); margin: 4px 0; }

/* -------- Hero (PC) -------- */
.hero-pc {
  position: relative;
  min-height: 560px;
  background: radial-gradient(ellipse at 20% 30%, rgba(0,122,255,0.18) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 70%, rgba(88,86,214,0.18) 0%, transparent 60%),
              linear-gradient(180deg, #ffffff 0%, #F2F2F7 100%);
  overflow: hidden;
  display: flex; align-items: center;
}
.hero-pc__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 32px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-pc__title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -1.6px;
  color: var(--label-primary);
}
.hero-pc__title .gradient-text {
  background: linear-gradient(135deg, #007AFF 0%, #AF52DE 60%, #FF2D55 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-pc__sub {
  margin-top: 22px;
  font-size: 18px;
  line-height: 1.6;
  color: var(--label-secondary);
  max-width: 480px;
}
.hero-pc__cta-row {
  margin-top: 36px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn-glow {
  position: relative;
  padding: 14px 30px;
  height: auto;
  font-size: 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, #007AFF, #5856D6);
  color: #fff;
  font-weight: 600;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 8px 28px rgba(0,122,255,0.38);
  overflow: hidden;
  transition: transform var(--dur-fast), box-shadow var(--dur-fast);
}
.btn-glow::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(135deg, #5AC8FA, #AF52DE);
  opacity: 0;
  transition: opacity var(--dur-base);
}
.btn-glow > span { position: relative; z-index: 1; display: inline-flex; align-items: center; gap: 8px; }
.btn-glow:hover { transform: translateY(-2px); box-shadow: 0 14px 40px rgba(0,122,255,0.55); }
.btn-glow:hover::before { opacity: 1; }
.btn-glow:active { transform: translateY(0); }

.btn-ghost {
  padding: 14px 28px;
  height: auto;
  font-size: 16px;
  border-radius: 14px;
  background: rgba(0,122,255,0.08);
  color: var(--ios-blue);
  font-weight: 600;
  border: none;
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 8px;
  transition: background var(--dur-fast), transform var(--dur-fast);
}
.btn-ghost:hover { background: rgba(0,122,255,0.15); transform: translateY(-2px); }

.hero-pc__visual {
  position: relative;
  height: 460px;
  display: flex; align-items: center; justify-content: center;
}
.hero-blob {
  position: absolute;
  width: 380px; height: 380px;
  border-radius: 50%;
  background: linear-gradient(135deg, #007AFF, #5856D6);
  opacity: 0.85;
  filter: blur(2px);
  animation: blob-float 8s ease-in-out infinite;
  box-shadow: 0 30px 80px rgba(0,122,255,0.45);
}
.hero-blob::after {
  content: ""; position: absolute; inset: -20px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(0,122,255,0.4), rgba(88,86,214,0.4));
  filter: blur(40px);
  z-index: -1;
}
@keyframes blob-float {
  0%, 100% { transform: translateY(0) rotate(0); border-radius: 60% 40% 55% 45%; }
  33%      { transform: translateY(-18px) rotate(60deg); border-radius: 45% 55% 40% 60%; }
  66%      { transform: translateY(8px) rotate(-30deg); border-radius: 55% 45% 60% 40%; }
}
.hero-glasses {
  position: relative;
  z-index: 2;
  font-size: 200px;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.25));
  animation: float 6s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-14px); }
}

/* 浮标卡片(挂在 Hero 视觉上) */
.hero-floating-card {
  position: absolute;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  padding: 12px 16px;
  border-radius: 14px;
  box-shadow: 0 12px 32px rgba(0,0,0,0.12);
  display: flex; align-items: center; gap: 10px;
  font-size: 13px;
  animation: card-pop 0.6s var(--ease-spring) backwards;
}
@keyframes card-pop { from { opacity: 0; transform: scale(0.8); } }
.hero-floating-card--1 { top: 30px; left: -10px; animation-delay: 0.4s; }
.hero-floating-card--2 { bottom: 40px; right: -20px; animation-delay: 0.7s; }
.hero-floating-card--3 { top: 50%; left: -40px; animation-delay: 1s; }
.hero-floating-card__ico {
  width: 32px; height: 32px;
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  flex-shrink: 0;
}

/* 信息条 */
.stats-strip {
  background: var(--bg-elevated);
  border-radius: 22px;
  padding: 24px 32px;
  margin: -60px auto 60px;
  max-width: 1080px;
  position: relative;
  z-index: 5;
  box-shadow: 0 20px 50px rgba(0,0,0,0.08);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stats-strip__item { text-align: center; }
.stats-strip__num {
  font-size: 32px; font-weight: 800; letter-spacing: -1px;
  background: linear-gradient(135deg, #007AFF, #5856D6);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stats-strip__label { font-size: 13px; color: var(--label-secondary); margin-top: 4px; }

/* 段落标题 */
.section-pc {
  padding: 60px 0 30px;
  text-align: center;
}
.section-pc__eyebrow {
  display: inline-block;
  padding: 6px 14px;
  background: rgba(0,122,255,0.08);
  color: var(--ios-blue);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.2px;
  border-radius: 999px;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-pc__title {
  font-size: 40px;
  font-weight: 700;
  letter-spacing: -1px;
  color: var(--label-primary);
}
.section-pc__sub {
  margin-top: 12px;
  font-size: 16px;
  color: var(--label-secondary);
}

/* 4 列功能卡 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card-pc {
  background: var(--bg-elevated);
  border-radius: 18px;
  padding: 28px;
  text-align: left;
  border: 1px solid var(--separator);
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base),
              border-color var(--dur-base);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.feature-card-pc::before {
  content: ""; position: absolute;
  top: -50%; right: -50%;
  width: 100%; height: 100%;
  background: radial-gradient(circle, var(--accent, #007AFF) 0%, transparent 60%);
  opacity: 0; transition: opacity var(--dur-base);
}
.feature-card-pc:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.12);
  border-color: transparent;
}
.feature-card-pc:hover::before { opacity: 0.15; }
.feature-card-pc__ico {
  width: 56px; height: 56px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  margin-bottom: 18px;
  background: linear-gradient(135deg, var(--accent, #007AFF), var(--accent2, #5856D6));
  box-shadow: 0 8px 24px var(--shadow-color, rgba(0,122,255,0.35));
}
.feature-card-pc__title { font-size: 18px; font-weight: 600; }
.feature-card-pc__desc {
  margin-top: 8px; font-size: 14px; color: var(--label-secondary); line-height: 1.5;
}
.feature-card-pc__link {
  margin-top: 18px;
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--ios-blue);
  font-size: 14px; font-weight: 500;
}

/* Showcase 大图区 */
.showcase {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  grid-template-rows: 240px 240px;
  gap: 20px;
}
.showcase__cell {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--dur-base);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 28px;
  color: #fff;
}
.showcase__cell:hover { transform: scale(1.02); }
.showcase__cell:hover .showcase__icon { transform: rotate(8deg) scale(1.08); }
.showcase__cell--big { grid-row: span 2; }
.showcase__cell-bg {
  position: absolute; inset: 0;
  background: var(--bg, linear-gradient(135deg, #007AFF, #5856D6));
  z-index: 0;
}
.showcase__cell-bg::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(255,255,255,0.25), transparent 60%);
}
.showcase__icon {
  position: absolute;
  top: 28px; right: 28px;
  font-size: 80px;
  transition: transform var(--dur-base) var(--ease-out);
  opacity: 0.85;
}
.showcase__cell-content { position: relative; z-index: 1; }
.showcase__cell-title { font-size: 22px; font-weight: 700; letter-spacing: -0.5px; }
.showcase__cell-desc { font-size: 14px; opacity: 0.9; margin-top: 6px; }
.showcase__cell-cta {
  margin-top: 14px;
  display: inline-flex; align-items: center; gap: 4px;
  background: rgba(255,255,255,0.22);
  backdrop-filter: blur(10px);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  width: fit-content;
}

/* PC 商品网格 */
.product-grid-pc {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.product-card-pc {
  background: var(--bg-elevated);
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--separator);
  transition: transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base),
              border-color var(--dur-base);
  cursor: pointer;
  display: flex; flex-direction: column;
}
.product-card-pc:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
  border-color: transparent;
}
.product-card-pc:hover .product-card-pc__img-wrap img { transform: scale(1.06); }
.product-card-pc:hover .product-card-pc__quick { opacity: 1; transform: translateY(0); }
.product-card-pc__img-wrap {
  aspect-ratio: 1/1;
  background: linear-gradient(135deg, #F2F2F7, #E5E5EA);
  position: relative;
  overflow: hidden;
}
.product-card-pc__img-wrap img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}
.product-card-pc__img-wrap-empty {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 64px; color: var(--ios-gray2);
}
.product-card-pc__quick {
  position: absolute; left: 12px; right: 12px; bottom: 12px;
  display: flex; gap: 8px;
  opacity: 0; transform: translateY(8px);
  transition: opacity var(--dur-base), transform var(--dur-base);
}
.product-card-pc__quick > * {
  flex: 1;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  border-radius: 9px;
  padding: 8px;
  text-align: center;
  font-size: 12px;
  font-weight: 500;
  color: var(--label-primary);
  border: none; cursor: pointer;
  transition: background var(--dur-fast);
}
.product-card-pc__quick > *:hover { background: #fff; color: var(--ios-blue); }
.product-card-pc__body { padding: 14px 16px 16px; flex: 1; display: flex; flex-direction: column; }
.product-card-pc__name {
  font-size: 14px; font-weight: 500;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 38px;
  line-height: 1.35;
}
.product-card-pc__tags { display: flex; gap: 4px; margin-top: 8px; flex-wrap: wrap; }
.product-card-pc__price-row {
  margin-top: auto; padding-top: 10px;
  display: flex; align-items: baseline; justify-content: space-between;
}
.product-card-pc__price {
  font-size: 20px; font-weight: 700; color: var(--ios-red);
}
.product-card-pc__price::before { content: "¥"; font-size: 13px; font-weight: 500; }

/* Sidebar (filters / nav) */
.sidebar {
  background: var(--bg-elevated);
  border-radius: 14px;
  padding: 20px;
  border: 1px solid var(--separator);
  position: sticky; top: 88px;
  height: fit-content;
}
.sidebar__title {
  font-size: 13px; font-weight: 600;
  color: var(--label-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.sidebar__group { margin-bottom: 22px; }
.sidebar__group:last-child { margin-bottom: 0; }

.layout-with-sidebar {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 28px;
  align-items: start;
}

/* 滚动浮现动画 */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* Scroll fade-in for cards (cascade) */
.cascade > * { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.cascade.is-visible > *:nth-child(1) { opacity: 1; transform: translateY(0); transition-delay: 0s; }
.cascade.is-visible > *:nth-child(2) { opacity: 1; transform: translateY(0); transition-delay: 0.08s; }
.cascade.is-visible > *:nth-child(3) { opacity: 1; transform: translateY(0); transition-delay: 0.16s; }
.cascade.is-visible > *:nth-child(4) { opacity: 1; transform: translateY(0); transition-delay: 0.24s; }
.cascade.is-visible > *:nth-child(n+5) { opacity: 1; transform: translateY(0); transition-delay: 0.32s; }

/* Footer */
.footer {
  margin-top: 80px;
  padding: 40px 32px 30px;
  background: #1c1c1e;
  color: rgba(255,255,255,0.7);
}
.footer__inner {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer__brand { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer__col h4 { font-size: 14px; color: #fff; margin-bottom: 12px; font-weight: 600; }
.footer__col a {
  display: block; font-size: 13px; color: rgba(255,255,255,0.6);
  padding: 4px 0;
  text-decoration: none;
  transition: color var(--dur-fast);
}
.footer__col a:hover { color: #fff; }
.footer__bottom {
  max-width: 1280px;
  margin: 30px auto 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 12px;
  color: rgba(255,255,255,0.4);
  text-align: center;
}

/* 大屏自适应,小屏退化为单列 */
@media (max-width: 1024px) {
  .container, .container-wide, .container-narrow,
  .topnav__inner, .hero-pc__inner, .footer__inner { padding-left: 20px; padding-right: 20px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .product-grid-pc { grid-template-columns: repeat(3, 1fr); }
  .hero-pc__title { font-size: 44px; }
  .layout-with-sidebar { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .showcase { grid-template-columns: 1fr 1fr; grid-template-rows: auto; }
  .showcase__cell--big { grid-row: auto; min-height: 240px; }
  .footer__inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .hero-pc { min-height: auto; }
  .hero-pc__inner { grid-template-columns: 1fr; padding: 50px 20px; }
  .hero-pc__visual { height: 280px; }
  .hero-pc__title { font-size: 34px; }
  .hero-blob { width: 240px; height: 240px; }
  .hero-glasses { font-size: 140px; }
  .feature-grid, .product-grid-pc { grid-template-columns: 1fr 1fr; gap: 12px; }
  .stats-strip { grid-template-columns: 1fr 1fr; gap: 16px; padding: 20px; margin: -40px 20px 40px; }
  .section-pc__title { font-size: 28px; }
  .topnav__links { display: none; }
  .footer__inner { grid-template-columns: 1fr; }
}