/* ============================================================
   Portraze Design System v2 — 「Studio」主题
   对标 aragon.ai 的版式语言（白底 / 大字号 / 高密度卡片网格 /
   hero 动效 / before-after 拖动条），但视觉识别独立：
   靛蓝 #4F46E5 → 紫罗兰 #7C3AED，不用对方的橙色。
   本文件为纯增量，不覆盖 style.css，逐页切换后再下线旧文件。
   ============================================================ */

:root {
  /* ---- 色彩 ---- */
  --pz-bg: #ffffff;
  --pz-bg-soft: #f6f7fb;
  --pz-bg-tint: #eef0fb;
  --pz-surface: #ffffff;
  --pz-ink: #0a0f1e;
  --pz-ink-2: #3c4657;
  --pz-muted: #6b7688;
  --pz-line: rgba(12, 18, 34, 0.09);
  --pz-line-2: rgba(12, 18, 34, 0.16);

  --pz-brand: #4f46e5;
  --pz-brand-2: #7c3aed;
  --pz-brand-ink: #3730a3;
  --pz-brand-wash: rgba(79, 70, 229, 0.08);
  --pz-grad: linear-gradient(100deg, #4f46e5 0%, #6d28d9 55%, #9333ea 100%);
  --pz-grad-soft: linear-gradient(120deg, #eef0ff 0%, #f6efff 100%);

  --pz-ok: #059669;
  --pz-warn: #b45309;

  /* ---- 形状 ---- */
  --pz-r-sm: 10px;
  --pz-r: 14px;
  --pz-r-lg: 20px;
  --pz-r-xl: 28px;
  --pz-r-pill: 999px;

  --pz-shadow-1: 0 1px 2px rgba(16, 24, 40, .05), 0 4px 12px rgba(16, 24, 40, .05);
  --pz-shadow-2: 0 2px 6px rgba(16, 24, 40, .06), 0 18px 40px rgba(16, 24, 40, .10);
  --pz-shadow-3: 0 30px 70px rgba(24, 22, 70, .16);
  --pz-ring: 0 0 0 3px rgba(79, 70, 229, .28);

  /* ---- 字体 ---- */
  --pz-font: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --pz-font-head: 'Sora', 'Inter', system-ui, sans-serif;

  /* ---- 版式 ---- */
  --pz-maxw: 1200px;
  --pz-maxw-wide: 1360px;
  --pz-gutter: 24px;
  --pz-section-y: 96px;
}

/* ============================================================
   基础
   ============================================================ */
.pz-wrap { max-width: var(--pz-maxw); margin: 0 auto; padding: 0 var(--pz-gutter); }
.pz-wrap-wide { max-width: var(--pz-maxw-wide); margin: 0 auto; padding: 0 var(--pz-gutter); }
.pz-section { padding: var(--pz-section-y) 0; }
.pz-section-tint { background: var(--pz-bg-soft); }
.pz-section-grad { background: var(--pz-grad-soft); }

.pz-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--pz-r-pill);
  background: var(--pz-brand-wash); color: var(--pz-brand-ink);
  font-size: 13px; font-weight: 600; letter-spacing: .01em;
}
.pz-eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--pz-brand-2); }

.pz-h1 {
  font-family: var(--pz-font-head);
  font-size: clamp(38px, 5.6vw, 66px);
  line-height: 1.05; letter-spacing: -.03em; font-weight: 700;
  color: var(--pz-ink); margin: 20px 0 0;
}
.pz-h2 {
  font-family: var(--pz-font-head);
  font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.12; letter-spacing: -.025em; font-weight: 700; margin: 0 0 14px;
}
.pz-h3 { font-family: var(--pz-font-head); font-size: 19px; font-weight: 650; letter-spacing: -.01em; margin: 0 0 8px; }
.pz-lead { font-size: clamp(16px, 1.5vw, 19px); line-height: 1.65; color: var(--pz-ink-2); max-width: 62ch; }
.pz-sub { font-size: 16px; color: var(--pz-muted); line-height: 1.7; }
.pz-center { text-align: center; }
.pz-center .pz-lead { margin-left: auto; margin-right: auto; }
.pz-head-block { max-width: 760px; margin: 0 auto 48px; }

/* ============================================================
   按钮
   ============================================================ */
.pz-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 14px 26px; border: 1px solid transparent; border-radius: var(--pz-r-pill);
  font-size: 15px; font-weight: 600; font-family: inherit;
  transition: transform .18s cubic-bezier(.22,1,.36,1), box-shadow .18s, background .18s, opacity .18s;
  will-change: transform;
}
.pz-btn:active { transform: translateY(1px) scale(.99); }
.pz-btn-primary {
  background: var(--pz-grad); color: #fff;
  box-shadow: 0 6px 20px rgba(79, 70, 229, .32);
}
.pz-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(79, 70, 229, .40); }
.pz-btn-ghost { background: #fff; color: var(--pz-ink); border-color: var(--pz-line-2); }
.pz-btn-ghost:hover { border-color: var(--pz-brand); color: var(--pz-brand); transform: translateY(-2px); }
.pz-btn-lg { padding: 17px 34px; font-size: 16.5px; }
.pz-btn-block { width: 100%; }

/* 光晕扫过（hero CTA） */
.pz-btn-shine { position: relative; overflow: hidden; }
.pz-btn-shine::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(105deg, transparent 30%, rgba(255,255,255,.45) 48%, transparent 66%);
  transform: translateX(-120%);
}
.pz-btn-shine:hover::after { animation: pzShine .9s ease; }
@keyframes pzShine { to { transform: translateX(120%); } }

/* ============================================================
   导航
   ============================================================ */
.pz-nav {
  position: sticky; top: 0; z-index: 60;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s, box-shadow .25s, background .25s;
}
.pz-nav.is-stuck { border-bottom-color: var(--pz-line); box-shadow: 0 4px 20px rgba(16,24,40,.05); }
.pz-nav-inner { display: flex; align-items: center; gap: 28px; height: 68px; }
.pz-logo { display: flex; align-items: center; gap: 9px; font-family: var(--pz-font-head); font-weight: 700; font-size: 19px; letter-spacing: -.02em; }
.pz-logo-mark {
  width: 28px; height: 28px; border-radius: 9px; background: var(--pz-grad);
  box-shadow: 0 4px 12px rgba(79,70,229,.35);
}
.pz-nav-links { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.pz-nav-link {
  padding: 8px 12px; border-radius: var(--pz-r-sm); font-size: 14.5px; font-weight: 550; color: var(--pz-ink-2);
  transition: background .16s, color .16s;
}
.pz-nav-link:hover { background: var(--pz-bg-soft); color: var(--pz-ink); }
.pz-nav-cta { margin-left: auto; display: flex; align-items: center; gap: 10px; }

/* 下拉（工具矩阵入口） */
.pz-nav-item { position: relative; }
.pz-nav-item:hover .pz-drop { opacity: 1; visibility: visible; transform: translateY(0); }
.pz-drop {
  position: absolute; top: calc(100% + 10px); left: -12px; width: 620px;
  background: #fff; border: 1px solid var(--pz-line); border-radius: var(--pz-r-lg);
  box-shadow: var(--pz-shadow-3); padding: 14px;
  opacity: 0; visibility: hidden; transform: translateY(-6px);
  transition: opacity .18s, transform .18s, visibility .18s;
  display: grid; grid-template-columns: 1fr 1fr; gap: 4px;
}
.pz-drop a {
  display: flex; gap: 10px; align-items: flex-start; padding: 10px 12px; border-radius: var(--pz-r-sm);
  transition: background .14s;
}
.pz-drop a:hover { background: var(--pz-bg-soft); }
.pz-drop .ic { font-size: 17px; line-height: 1.2; }
.pz-drop .t { font-size: 14px; font-weight: 600; color: var(--pz-ink); }
.pz-drop .d { font-size: 12.5px; color: var(--pz-muted); }
.pz-nav-toggle { display: none; }

/* ============================================================
   HERO — 视频底 + 光晕 + 浮动卡片
   ============================================================ */
.pz-hero { position: relative; padding: 72px 0 88px; overflow: hidden; }
.pz-hero::before {
  content: ''; position: absolute; top: -220px; left: 50%; transform: translateX(-50%);
  width: 1000px; height: 620px; border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(124,58,237,.20), rgba(79,70,229,.10) 45%, transparent 70%);
  filter: blur(10px); pointer-events: none;
}
.pz-hero-grid { position: relative; display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.pz-hero h1 .hl {
  background: var(--pz-grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.pz-hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.pz-hero-proof { display: flex; align-items: center; gap: 14px; margin-top: 26px; }
.pz-avatars { display: flex; }
.pz-avatars span {
  width: 34px; height: 34px; border-radius: 50%; margin-left: -10px;
  border: 2px solid #fff; background: var(--pz-grad-soft);
  display: grid; place-items: center; font-size: 12px; font-weight: 700; color: var(--pz-brand-ink);
  box-shadow: var(--pz-shadow-1);
}
.pz-avatars span:first-child { margin-left: 0; }
.pz-stars { color: #f59e0b; letter-spacing: 2px; font-size: 15px; }

/* 视觉区：主图 + 浮动小卡 + 视频层 */
.pz-hero-visual { position: relative; }
.pz-visual-main {
  position: relative; border-radius: var(--pz-r-xl); overflow: hidden;
  box-shadow: var(--pz-shadow-3); background: var(--pz-bg-tint);
  aspect-ratio: 4 / 5;
}
.pz-visual-main img, .pz-visual-main video {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
/* 多张图交叉淡入（aragon 同款做法） */
.pz-xfade { position: absolute; inset: 0; }
.pz-xfade img, .pz-xfade video {
  position: absolute; inset: 0; opacity: 0;
  animation: pzXfade 12s infinite;
}
.pz-xfade img:nth-child(2), .pz-xfade video:nth-child(2) { animation-delay: 4s; }
.pz-xfade img:nth-child(3), .pz-xfade video:nth-child(3) { animation-delay: 8s; }
@keyframes pzXfade {
  0%   { opacity: 0; transform: scale(1.04); }
  8%   { opacity: 1; transform: scale(1); }
  30%  { opacity: 1; transform: scale(1); }
  38%  { opacity: 0; transform: scale(1.02); }
  100% { opacity: 0; transform: scale(1.04); }
}

.pz-float-card {
  position: absolute; background: #fff; border: 1px solid var(--pz-line);
  border-radius: var(--pz-r-lg); box-shadow: var(--pz-shadow-2);
  padding: 12px 16px; display: flex; align-items: center; gap: 10px;
  font-size: 13.5px; font-weight: 600; color: var(--pz-ink);
  animation: pzFloat 6s ease-in-out infinite;
}
.pz-float-card.a { left: -34px; top: 12%; }
.pz-float-card.b { right: -26px; bottom: 16%; animation-delay: -2.4s; }
.pz-float-card .pill {
  padding: 3px 9px; border-radius: var(--pz-r-pill); font-size: 11.5px; font-weight: 700;
  background: rgba(5,150,105,.12); color: var(--pz-ok);
}
@keyframes pzFloat {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-12px); }
}

/* ============================================================
   Logo 墙 marquee
   ============================================================ */
.pz-marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.pz-marquee-track { display: flex; gap: 56px; width: max-content; animation: pzMarquee 28s linear infinite; }
.pz-marquee:hover .pz-marquee-track { animation-play-state: paused; }
.pz-marquee-track span {
  font-family: var(--pz-font-head); font-size: 17px; font-weight: 650;
  color: #9aa3b2; letter-spacing: -.01em; white-space: nowrap;
}
@keyframes pzMarquee { to { transform: translateX(-50%); } }

/* ============================================================
   卡片 / 网格
   ============================================================ */
.pz-grid { display: grid; gap: 20px; }
.pz-grid-2 { grid-template-columns: repeat(2, 1fr); }
.pz-grid-3 { grid-template-columns: repeat(3, 1fr); }
.pz-grid-4 { grid-template-columns: repeat(4, 1fr); }

.pz-card {
  background: var(--pz-surface); border: 1px solid var(--pz-line);
  border-radius: var(--pz-r-lg); padding: 26px;
  transition: transform .22s cubic-bezier(.22,1,.36,1), box-shadow .22s, border-color .22s;
}
.pz-card:hover { transform: translateY(-4px); box-shadow: var(--pz-shadow-2); border-color: var(--pz-line-2); }
.pz-card-ic {
  width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center;
  background: var(--pz-grad-soft); font-size: 20px; margin-bottom: 16px;
}
.pz-card p { color: var(--pz-muted); font-size: 15px; line-height: 1.65; }

/* 工具矩阵：高密度小卡（aragon 的 /photo-editor 形态） */
.pz-tools { display: grid; grid-template-columns: repeat(auto-fill, minmax(216px, 1fr)); gap: 14px; }
.pz-tool {
  position: relative; display: flex; flex-direction: column; gap: 6px;
  padding: 16px 18px; border: 1px solid var(--pz-line); border-radius: var(--pz-r);
  background: #fff; overflow: hidden;
  transition: transform .2s cubic-bezier(.22,1,.36,1), box-shadow .2s, border-color .2s;
}
.pz-tool::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--pz-grad); opacity: 0; transition: opacity .2s;
}
.pz-tool:hover { transform: translateY(-3px); box-shadow: var(--pz-shadow-2); border-color: rgba(79,70,229,.35); }
.pz-tool:hover::before { opacity: 1; }
.pz-tool .ic { font-size: 19px; }
.pz-tool .t { font-size: 14.5px; font-weight: 650; color: var(--pz-ink); }
.pz-tool .d { font-size: 13px; color: var(--pz-muted); line-height: 1.55; }
.pz-tool .tag {
  position: absolute; right: 10px; top: 10px; font-size: 10.5px; font-weight: 700;
  padding: 2px 7px; border-radius: var(--pz-r-pill);
  background: rgba(5,150,105,.12); color: var(--pz-ok);
}

/* 场景包卡片（/photo-generator 形态）：图 + 渐变遮罩 */
.pz-pack { position: relative; border-radius: var(--pz-r-lg); overflow: hidden; aspect-ratio: 3/4; background: var(--pz-bg-tint); }
.pz-pack img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s cubic-bezier(.22,1,.36,1); }
.pz-pack:hover img { transform: scale(1.07); }
.pz-pack::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(8,10,25,.78) 100%);
}
.pz-pack .lb { position: absolute; left: 16px; bottom: 14px; z-index: 2; color: #fff; }
.pz-pack .lb b { display: block; font-size: 16px; font-weight: 650; letter-spacing: -.01em; }
.pz-pack .lb i { font-style: normal; font-size: 12.5px; opacity: .82; }

/* ============================================================
   Before / After 拖动条（aragon 的 TransitionStrip）
   ============================================================ */
.pz-ba { position: relative; border-radius: var(--pz-r-xl); overflow: hidden; aspect-ratio: 16/10; user-select: none; touch-action: none; box-shadow: var(--pz-shadow-2); }
.pz-ba img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.pz-ba .after { clip-path: inset(0 0 0 var(--pz-pos, 50%)); }
.pz-ba-handle {
  position: absolute; top: 0; bottom: 0; left: var(--pz-pos, 50%); width: 2px;
  background: #fff; box-shadow: 0 0 0 1px rgba(0,0,0,.18); cursor: ew-resize; z-index: 3;
}
.pz-ba-handle::after {
  content: '‹ ›'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
  width: 42px; height: 42px; border-radius: 50%; background: #fff; color: var(--pz-ink);
  display: grid; place-items: center; font-size: 15px; font-weight: 700; letter-spacing: 1px;
  box-shadow: var(--pz-shadow-2);
}
.pz-ba .tag { position: absolute; top: 12px; z-index: 2; font-size: 11.5px; font-weight: 700; padding: 4px 10px; border-radius: var(--pz-r-pill); background: rgba(10,15,30,.55); color: #fff; backdrop-filter: blur(6px); }
.pz-ba .tag.l { left: 12px; }
.pz-ba .tag.r { right: 12px; }

/* ============================================================
   步骤 / 时间线
   ============================================================ */
.pz-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: s; }
.pz-step { position: relative; padding-top: 14px; }
.pz-step::before {
  counter-increment: s; content: counter(s);
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: var(--pz-grad); color: #fff; font-size: 14px; font-weight: 700;
  box-shadow: 0 6px 16px rgba(79,70,229,.30); margin-bottom: 14px;
}
.pz-step .t { font-size: 16.5px; font-weight: 650; margin-bottom: 6px; }
.pz-step .d { font-size: 14.5px; color: var(--pz-muted); line-height: 1.6; }

/* ============================================================
   定价
   ============================================================ */
.pz-pricing { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; align-items: start; }
.pz-plan {
  position: relative; background: #fff; border: 1px solid var(--pz-line);
  border-radius: var(--pz-r-xl); padding: 32px 28px;
  transition: transform .22s cubic-bezier(.22,1,.36,1), box-shadow .22s;
}
.pz-plan:hover { transform: translateY(-4px); box-shadow: var(--pz-shadow-2); }
.pz-plan.featured { border-color: transparent; box-shadow: var(--pz-shadow-3); }
.pz-plan.featured::before {
  content: ''; position: absolute; inset: -1px; border-radius: inherit; padding: 1px;
  background: var(--pz-grad); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.pz-plan .name { font-size: 15px; font-weight: 700; letter-spacing: .02em; text-transform: uppercase; color: var(--pz-muted); }
.pz-plan .price { font-family: var(--pz-font-head); font-size: 54px; font-weight: 700; letter-spacing: -.035em; line-height: 1; margin: 16px 0 6px; }
.pz-plan .price sub { font-size: 18px; font-weight: 600; vertical-align: baseline; color: var(--pz-muted); }
.pz-plan .note { font-size: 13.5px; color: var(--pz-muted); }
.pz-plan ul { list-style: none; margin: 22px 0 26px; display: grid; gap: 11px; }
.pz-plan li { display: flex; gap: 10px; font-size: 14.5px; color: var(--pz-ink-2); line-height: 1.5; }
.pz-plan li b { color: var(--pz-ink); font-weight: 650; }
.pz-plan li .ck { color: var(--pz-brand); font-weight: 700; }
.pz-badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--pz-grad); color: #fff; font-size: 12px; font-weight: 700;
  padding: 5px 14px; border-radius: var(--pz-r-pill); white-space: nowrap;
  box-shadow: 0 6px 16px rgba(79,70,229,.34);
}

/* ============================================================
   FAQ 手风琴
   ============================================================ */
.pz-faq { max-width: 820px; margin: 0 auto; }
.pz-faq details {
  border-bottom: 1px solid var(--pz-line); padding: 20px 0;
}
.pz-faq summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 20px;
  font-size: 17px; font-weight: 600; letter-spacing: -.01em; color: var(--pz-ink);
}
.pz-faq summary::-webkit-details-marker { display: none; }
.pz-faq summary::after {
  content: '+'; font-size: 22px; font-weight: 400; color: var(--pz-muted);
  transition: transform .22s, color .22s;
}
.pz-faq details[open] summary::after { content: '+'; transform: rotate(45deg); color: var(--pz-brand); }
.pz-faq details p { margin-top: 12px; font-size: 15.5px; line-height: 1.75; color: var(--pz-ink-2); }

/* ============================================================
   评价
   ============================================================ */
.pz-quote {
  background: #fff; border: 1px solid var(--pz-line); border-radius: var(--pz-r-lg);
  padding: 24px; display: flex; flex-direction: column; gap: 14px;
}
.pz-quote .who { display: flex; align-items: center; gap: 12px; margin-top: auto; }
.pz-quote .who .av { width: 38px; height: 38px; border-radius: 50%; background: var(--pz-grad-soft); display: grid; place-items: center; font-weight: 700; color: var(--pz-brand-ink); font-size: 13px; }
.pz-quote .who b { font-size: 14.5px; }
.pz-quote .who span { display: block; font-size: 13px; color: var(--pz-muted); font-weight: 400; }

/* ============================================================
   滚动入场
   ============================================================ */
.pz-reveal { opacity: 0; transform: translateY(22px); }
.pz-reveal.in {
  opacity: 1; transform: none;
  transition: opacity .7s cubic-bezier(.22,1,.36,1), transform .7s cubic-bezier(.22,1,.36,1);
}

/* ============================================================
   页脚
   ============================================================ */
.pz-footer { background: #0a0f1e; color: #c3c9d6; padding: 64px 0 28px; }
.pz-footer a { color: #c3c9d6; transition: color .16s; }
.pz-footer a:hover { color: #fff; }
.pz-footer .cols { display: grid; grid-template-columns: 1.4fr repeat(4, 1fr); gap: 32px; }
.pz-footer h4 { color: #fff; font-size: 13px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; margin-bottom: 14px; }
.pz-footer ul { list-style: none; display: grid; gap: 9px; font-size: 14px; }
.pz-footer .bottom {
  margin-top: 44px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.10);
  display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; font-size: 13px; color: #8b93a5;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  :root { --pz-section-y: 72px; }
  .pz-hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .pz-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .pz-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .pz-steps { grid-template-columns: repeat(2, 1fr); }
  .pz-pricing { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
  .pz-footer .cols { grid-template-columns: repeat(2, 1fr); }
  .pz-float-card.a { left: 0; }
  .pz-float-card.b { right: 0; }
}
@media (max-width: 720px) {
  .pz-nav-links, .pz-drop { display: none; }
  /* 汉堡菜单展开（main.js 给 #navLinks 加 .open） */
  .pz-nav-links.open {
    display: flex; flex-direction: column; align-items: stretch; gap: 2px;
    position: absolute; top: 100%; left: 0; right: 0; z-index: 70;
    background: #fff; border-top: 1px solid var(--pz-line); border-bottom: 1px solid var(--pz-line);
    padding: 12px var(--pz-gutter) 16px; box-shadow: var(--pz-shadow-2);
  }
  .pz-nav-toggle { display: inline-flex; }
  .pz-grid-2, .pz-grid-3, .pz-grid-4 { grid-template-columns: 1fr; }
  .pz-steps { grid-template-columns: 1fr; }
  .pz-hero { padding: 48px 0 60px; }
  .pz-tools { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}

/* ============================================================
   首页 hero 多图交叉淡入（由 js/main.js 驱动 .is-on 轮换）
   ============================================================ */
.pz-xfade-track { transition: transform .25s cubic-bezier(.22,1,.36,1); }
[data-crossfade] { position: relative; }
[data-crossfade] > img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transition: opacity 1s ease;
}
[data-crossfade] > img.is-on { opacity: 1; }

/* ============================================================
   FAQ 手风琴（首页沿用 .faq-item/.faq-q/.faq-a，由 js/main.js 控制 max-height）
   ============================================================ */
.pz-faq .faq-item {
  background: #fff; border: 1px solid var(--pz-line);
  border-radius: var(--pz-r-lg); margin-bottom: 12px; overflow: hidden;
  transition: box-shadow .2s, border-color .2s;
}
.pz-faq .faq-item.open { border-color: rgba(79,70,229,.4); box-shadow: var(--pz-shadow-1); }
.pz-faq .faq-q {
  width: 100%; text-align: left; background: none; border: 0;
  padding: 20px 24px; font-size: 16.5px; font-weight: 600; color: var(--pz-ink);
  font-family: inherit; letter-spacing: -.01em;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.pz-faq .faq-q .ic {
  font-size: 22px; font-weight: 400; color: var(--pz-muted);
  transition: transform .22s, color .22s;
}
.pz-faq .faq-item.open .faq-q .ic { transform: rotate(45deg); color: var(--pz-brand); }
.pz-faq .faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.pz-faq .faq-a p {
  padding: 0 24px 20px; font-size: 15.5px; line-height: 1.75; color: var(--pz-ink-2);
}

/* ============================================================
   生成区（studio）视觉对齐 v2
   —— DOM 与 id 保持原样（studio.js 依赖），只覆盖外观
   ============================================================ */
.studio { padding: var(--pz-section-y) 0; background: #fff; }
.studio .container { max-width: var(--pz-maxw); margin: 0 auto; padding: 0 var(--pz-gutter); }
.studio .sec-head { text-align: center; max-width: 720px; margin: 0 auto 40px; }
.studio .sec-eyebrow {
  display: inline-block; padding: 6px 14px; border-radius: var(--pz-r-pill);
  background: var(--pz-brand-wash); color: var(--pz-brand-ink);
  font-size: 13px; font-weight: 600;
}
.studio .sec-title {
  font-family: var(--pz-font-head); font-size: clamp(28px, 3.4vw, 44px);
  line-height: 1.12; letter-spacing: -.025em; font-weight: 700; margin: 16px 0 12px; color: var(--pz-ink);
}
.studio .sec-desc { font-size: 17px; color: var(--pz-ink-2); line-height: 1.6; }
.studio-wrap {
  background: var(--pz-bg-soft); border: 1px solid var(--pz-line);
  border-radius: var(--pz-r-xl); padding: 32px;
}
.studio .dropzone {
  background: #fff; border: 2px dashed var(--pz-line-2); border-radius: var(--pz-r-lg);
  padding: 40px 24px; text-align: center; cursor: pointer;
  transition: border-color .18s, background .18s, transform .18s;
}
.studio .dropzone:hover, .studio .dropzone.drag {
  border-color: var(--pz-brand); background: var(--pz-brand-wash); transform: translateY(-2px);
}
.studio .dropzone h3 { font-family: var(--pz-font-head); font-size: 18px; font-weight: 650; margin: 10px 0 6px; color: var(--pz-ink); }
.studio .dropzone p { font-size: 14.5px; color: var(--pz-muted); }
.studio .dz-icon { font-size: 34px; }

.studio .plan-picker { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 22px; }
.studio .plan-chip {
  position: relative; text-align: left; background: #fff; border: 1px solid var(--pz-line);
  border-radius: var(--pz-r); padding: 18px; font-family: inherit;
  transition: transform .2s cubic-bezier(.22,1,.36,1), box-shadow .2s, border-color .2s;
}
.studio .plan-chip:hover { transform: translateY(-3px); box-shadow: var(--pz-shadow-2); }
.studio .plan-chip.active { border-color: transparent; box-shadow: var(--pz-shadow-3); }
.studio .plan-chip.active::before {
  content: ''; position: absolute; inset: -1px; border-radius: inherit; padding: 1px;
  background: var(--pz-grad); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none;
}
.studio .plan-main { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.studio .plan-name { font-size: 15px; font-weight: 700; color: var(--pz-ink); }
.studio .plan-price { font-family: var(--pz-font-head); font-size: 24px; font-weight: 700; letter-spacing: -.02em; color: var(--pz-ink); }
.studio .plan-desc { display: block; margin-top: 6px; font-size: 13px; color: var(--pz-muted); line-height: 1.5; }
.studio .plan-badge {
  display: inline-block; margin-top: 10px; padding: 3px 10px; border-radius: var(--pz-r-pill);
  background: var(--pz-grad); color: #fff; font-size: 11.5px; font-weight: 700;
}

.studio .style-picker { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.studio .style-chip {
  display: inline-flex; align-items: center; gap: 7px; padding: 9px 15px;
  border: 1px solid var(--pz-line-2); border-radius: var(--pz-r-pill);
  background: #fff; font-size: 14px; font-weight: 550; color: var(--pz-ink-2); font-family: inherit;
  transition: border-color .16s, color .16s, background .16s, transform .16s;
}
.studio .style-chip:hover { border-color: var(--pz-brand); color: var(--pz-brand); transform: translateY(-2px); }
.studio .style-chip.active { background: var(--pz-grad); border-color: transparent; color: #fff; }

.studio .gen-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; justify-content: center; margin-top: 26px; }
.studio .btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 15px 30px; border-radius: var(--pz-r-pill); font-weight: 600; font-size: 16px;
  font-family: inherit; border: 1px solid transparent;
  transition: transform .18s cubic-bezier(.22,1,.36,1), box-shadow .18s, opacity .18s;
}
.studio .btn-primary { background: var(--pz-grad); color: #fff; box-shadow: 0 6px 20px rgba(79,70,229,.32); }
.studio .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(79,70,229,.40); }
.studio .btn-ghost { background: #fff; color: var(--pz-ink); border-color: var(--pz-line-2); }
.studio .btn-ghost:hover { border-color: var(--pz-brand); color: var(--pz-brand); }
.studio .btn-lg { padding: 17px 34px; font-size: 16.5px; }
.studio .btn-sm { padding: 10px 18px; font-size: 14px; }
.studio .gen-hint { font-size: 14.5px; color: var(--pz-muted); }

.studio .unlock-bar {
  display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap;
  margin-top: 24px; padding: 18px 22px; border-radius: var(--pz-r-lg);
  background: var(--pz-grad-soft); border: 1px solid rgba(79,70,229,.25);
}
.studio .ub-info { display: flex; align-items: center; gap: 12px; font-size: 15px; color: var(--pz-ink-2); }
.studio .ub-ico { font-size: 20px; }

.studio .progress-bar { margin-top: 22px; }
.studio .progress-track { height: 8px; border-radius: var(--pz-r-pill); background: var(--pz-bg-tint); overflow: hidden; }
.studio .progress-fill {
  height: 100%; width: 0; border-radius: var(--pz-r-pill); background: var(--pz-grad);
  transition: width .4s ease;
}
.studio .progress-label {
  display: flex; justify-content: space-between; margin-top: 10px;
  font-size: 14px; color: var(--pz-muted);
}
.studio .gen-error {
  margin-top: 16px; padding: 14px 18px; border-radius: var(--pz-r);
  background: rgba(180,35,24,.07); border: 1px solid rgba(180,35,24,.25);
  color: #b42318; font-size: 14.5px;
}
.studio .result-tools { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 22px; }
.studio .rt-hint { font-size: 14px; color: var(--pz-muted); }
.studio .size-select {
  padding: 10px 14px; border: 1px solid var(--pz-line-2); border-radius: var(--pz-r-sm);
  background: #fff; font-size: 14px; font-family: inherit; color: var(--pz-ink);
}
.studio .result-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 14px; margin-top: 20px;
}
.studio .result-grid img, .studio .result-grid .rc {
  width: 100%; border-radius: var(--pz-r); box-shadow: var(--pz-shadow-1);
  transition: transform .22s cubic-bezier(.22,1,.36,1), box-shadow .22s;
}
.studio .result-grid img:hover, .studio .result-grid .rc:hover { transform: translateY(-4px); box-shadow: var(--pz-shadow-2); }
.studio .thumb-grid { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.studio .thumb-grid img { width: 64px; height: 64px; object-fit: cover; border-radius: var(--pz-r-sm); border: 1px solid var(--pz-line); }

@media (max-width: 720px) {
  .studio-wrap { padding: 20px; }
  .studio .plan-picker { grid-template-columns: 1fr; }
  .studio .gen-actions { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; }
  .pz-reveal { opacity: 1; transform: none; }
}