/* ==========================================================================
   照片书页面 / 相框样式
   所有样式以 .page 为根，页面固定比例 3:4，通过 transform:scale 适配屏幕
   相框以 .photo-frame.frame-<name> 的组合类进行切换
   ========================================================================== */

/* ===== 书页本体 ===== */
.page-root{
  width:640px;height:854px;background:#fff;position:relative;box-shadow:var(--shadow-lg);
  border-radius:4px;overflow:hidden;flex:none;transition:background .2s
}
.page-root.paper-warm{background:#fffbef}
.page-root.paper-cream{background:#fbf4e3}
.page-root.paper-beige{background:#f5ead6}
.page-root.paper-dark{background:#1f1b16;color:#f6efe1}
.page-root.paper-linen{background:#f7f2e8;background-image:repeating-linear-gradient(45deg,rgba(0,0,0,.02) 0 2px,transparent 2px 4px)}
.page-root.paper-grid{background:#fffdf7;background-image:linear-gradient(#e8e0cf 1px,transparent 1px),linear-gradient(90deg,#e8e0cf 1px,transparent 1px);background-size:24px 24px}

.page-page-number{
  position:absolute;bottom:18px;left:0;right:0;text-align:center;color:var(--muted);font-size:12px;letter-spacing:3px
}

/* ===== 封面样式 ===== */
.cover-root{
  width:640px;height:854px;position:relative;overflow:hidden;border-radius:4px;box-shadow:var(--shadow-lg);
  display:flex;flex-direction:column;flex:none;background:#fff
}
.cover-root .cover-photo{position:absolute;inset:0;background-size:cover;background-position:center}
.cover-root .cover-overlay{position:absolute;inset:0}
.cover-root .cover-texts{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:44px;color:#fff;text-align:center}
.cover-root .cover-title{font-size:52px;font-weight:800;letter-spacing:3px;margin:0 0 16px;text-shadow:0 4px 16px rgba(0,0,0,.4);line-height:1.15}
.cover-root .cover-sub{font-size:18px;letter-spacing:6px;margin:0 0 12px;opacity:.95}
.cover-root .cover-author{font-size:14px;letter-spacing:4px;opacity:.9;margin-top:auto}

/* Cover: 经典 (classic) */
.cover-classic .cover-overlay{background:linear-gradient(to bottom, rgba(0,0,0,.1) 0%, rgba(0,0,0,.45) 60%, rgba(0,0,0,.75) 100%)}
.cover-classic .cover-texts{justify-content:flex-end;padding-bottom:76px}
.cover-classic .cover-title{font-family:"Noto Serif SC",SimSun,serif}

/* Cover: 极简 (minimal) */
.cover-minimal{background:#fffdf7}
.cover-minimal .cover-photo{position:absolute;top:80px;left:80px;right:80px;bottom:220px}
.cover-minimal .cover-overlay{display:none}
.cover-minimal .cover-texts{justify-content:flex-end;color:#2d2a26;padding:0 80px 90px}
.cover-minimal .cover-title{font-size:44px;text-shadow:none;font-family:"Noto Serif SC",serif}
.cover-minimal .cover-sub{color:var(--muted);font-size:14px;letter-spacing:4px}
.cover-minimal .cover-author{color:var(--muted);font-size:12px}

/* Cover: 宝丽来 (polaroid) */
.cover-polaroid{background:linear-gradient(160deg,#f1e6d2,#d9c7a5)}
.cover-polaroid .cover-photo{
  position:absolute;top:120px;left:50%;transform:translateX(-50%) rotate(-4deg);
  width:420px;height:420px;
  background-color:#fff;background-size:cover;background-position:center;
  padding:22px 22px 70px;
  border:22px solid #fff;border-bottom-width:70px;
  box-shadow:0 20px 40px rgba(0,0,0,.25);
}
.cover-polaroid .cover-overlay{display:none}
.cover-polaroid .cover-texts{justify-content:flex-end;color:#2d2a26;padding-bottom:80px}
.cover-polaroid .cover-title{font-family:"Caveat","Ma Shan Zheng",cursive;font-size:54px;color:#2d2a26;text-shadow:none}
.cover-polaroid .cover-sub{color:#6b6357}
.cover-polaroid .cover-author{color:#6b6357}

/* Cover: 复古 (vintage) */
.cover-vintage .cover-overlay{
  background:
    linear-gradient(rgba(60,40,20,.25),rgba(60,40,20,.6)),
    repeating-linear-gradient(45deg,rgba(255,220,160,.08) 0 2px,transparent 2px 4px)
}
.cover-vintage .cover-texts{justify-content:center}
.cover-vintage .cover-title{
  font-family:"Noto Serif SC",serif;font-size:48px;
  padding:18px 42px;border-top:2px solid rgba(255,240,210,.8);border-bottom:2px solid rgba(255,240,210,.8);
  display:inline-block
}
.cover-vintage .cover-sub{font-family:"Noto Serif SC",serif;margin-top:22px}
.cover-vintage .cover-author{position:absolute;bottom:60px;left:0;right:0;text-align:center;margin:0}

/* Cover: 杂志 (magazine) */
.cover-magazine{background:#111}
.cover-magazine .cover-photo{clip-path:polygon(0 0,100% 0,100% 75%,0 88%)}
.cover-magazine .cover-overlay{background:linear-gradient(to bottom,transparent 50%, rgba(0,0,0,.4) 70%, rgba(0,0,0,.9))}
.cover-magazine .cover-texts{justify-content:flex-end;padding:60px 50px 70px;align-items:flex-start;text-align:left}
.cover-magazine .cover-title{font-size:64px;letter-spacing:0;font-weight:900;line-height:1;font-family:"Noto Sans SC",sans-serif}
.cover-magazine .cover-sub{font-size:13px;letter-spacing:3px;opacity:.8;margin-top:14px}
.cover-magazine .cover-author{position:absolute;top:40px;right:40px;font-size:12px;letter-spacing:2px;margin:0;opacity:.85;border:1px solid rgba(255,255,255,.35);padding:6px 14px;border-radius:999px}

/* Cover: 信笺 (letter) */
.cover-letter{background:#f7eedc}
.cover-letter::before{
  content:"";position:absolute;inset:24px;border:1.5px solid #c7a86b;pointer-events:none
}
.cover-letter::after{
  content:"";position:absolute;inset:38px;border:1px solid #c7a86b;pointer-events:none;opacity:.5
}
.cover-letter .cover-photo{top:140px;left:80px;right:80px;bottom:260px;background-size:cover}
.cover-letter .cover-overlay{display:none}
.cover-letter .cover-texts{justify-content:flex-end;color:#4a3520;padding:0 70px 110px}
.cover-letter .cover-title{font-family:"Noto Serif SC",serif;font-size:46px;text-shadow:none;color:#4a3520}
.cover-letter .cover-sub{color:#8c6a3f}
.cover-letter .cover-author{color:#8c6a3f;font-size:12px}

/* ===== 内页版式（1~4张照片、图文混排） ===== */
.layout-root{
  position:absolute;inset:0;padding:50px 50px 64px;display:flex;flex-direction:column;gap:18px
}
.layout-photos{flex:1;display:flex;gap:18px;min-height:0}
.layout-text{padding:0 4px;line-height:1.9;font-size:15px;color:inherit;white-space:pre-wrap;word-break:break-word}
.page-root.paper-dark .layout-text{color:#f6efe1}

/* 单图满版 */
.layout-full .layout-photos{height:100%}
.layout-full .photo-frame{flex:1}
/* 单图居中 + 下方文字 */
.layout-one-text .layout-photos{height:64%}
.layout-one-text .layout-text{height:auto}
/* 上下两张 */
.layout-two-v .layout-photos{flex-direction:column}
.layout-two-v .photo-frame{flex:1;min-height:0}
/* 左右两张 */
.layout-two-h .photo-frame{flex:1;min-width:0}
/* 2x2 四张 */
.layout-grid4 .layout-photos{flex-wrap:wrap;gap:12px}
.layout-grid4 .photo-frame{flex:1 1 calc(50% - 6px);min-width:0}
/* 大图 + 右侧两张小图 */
.layout-big-side .layout-photos .big{flex:2;min-width:0}
.layout-big-side .layout-photos .side{flex:1;display:flex;flex-direction:column;gap:12px;min-width:0}
.layout-big-side .layout-photos .side .photo-frame{flex:1;min-height:0}
/* 纯文字 */
.layout-text-only .layout-photos{display:none}
.layout-text-only .layout-text{font-size:18px;padding:60px 16px;line-height:2.1}

/* 页眉页脚 */
.page-title{position:absolute;top:28px;left:50px;right:50px;text-align:center;font-size:12px;letter-spacing:4px;color:var(--muted);text-transform:uppercase}
.page-date{position:absolute;bottom:26px;right:50px;font-size:11px;color:var(--muted);letter-spacing:2px}

/* ==========================================================================
   PhotoFrame 相框样式
   每个相框：.photo-frame + .frame-<name>
   .photo-frame .ph 为照片容器；若无照片则显示占位
   ========================================================================== */
.photo-frame{
  position:relative;display:flex;align-items:stretch;justify-content:stretch;
  background:#fff;overflow:hidden;transition:transform .2s;
  cursor:pointer
}
.photo-frame .ph{
  flex:1;background-size:cover;background-position:center;background-repeat:no-repeat;
  background-color:#e9e0cf;
  display:flex;align-items:center;justify-content:center;color:rgba(0,0,0,.25);font-size:14px;
  position:relative
}
.photo-frame .ph::after{
  content:attr(data-empty);position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  pointer-events:none;color:rgba(0,0,0,.3);font-size:13px;letter-spacing:2px
}
.photo-frame.has-photo .ph::after{content:""}
.photo-frame:hover{transform:scale(1.01)}

/* 1. 无边 plain */
.photo-frame.frame-plain{border-radius:2px;background:transparent}

/* 2. 白边 white */
.photo-frame.frame-white{background:#fff;padding:10px;box-shadow:0 6px 18px rgba(0,0,0,.08);border-radius:4px}

/* 3. 宝丽来 polaroid */
.photo-frame.frame-polaroid{
  background:#fff;padding:14px 14px 52px;box-shadow:0 10px 22px rgba(0,0,0,.18);border-radius:3px;
  transform:rotate(-1.2deg);transform-origin:center;
}
.photo-frame.frame-polaroid::after{
  content:attr(data-caption);position:absolute;left:0;right:0;bottom:14px;text-align:center;
  color:#6b6357;font-family:"Caveat","Ma Shan Zheng",cursive;font-size:20px
}

/* 4. 木质 wood */
.photo-frame.frame-wood{
  padding:18px;border-radius:2px;
  background:
    linear-gradient(135deg, #b7865a, #8a5a33 40%, #c89764 70%, #85502a),
    #8a5a33;
  box-shadow:0 10px 22px rgba(0,0,0,.25), inset 0 0 0 2px rgba(255,255,255,.12)
}
.photo-frame.frame-wood .ph{box-shadow:inset 0 0 0 4px rgba(0,0,0,.15)}

/* 5. 金属金 gold */
.photo-frame.frame-gold{
  padding:12px;border-radius:2px;
  background:
    linear-gradient(135deg,#f6d889,#b6822a 45%,#f6d889 55%,#8a5e1b);
  box-shadow:0 10px 22px rgba(0,0,0,.25), inset 0 0 0 3px rgba(255,255,255,.25)
}

/* 6. 双线描边 double */
.photo-frame.frame-double{
  padding:12px;background:#fff;border:1px solid #2d2a26;
  outline:1px solid #2d2a26;outline-offset:4px;border-radius:0
}

/* 7. 胶卷 filmstrip */
.photo-frame.frame-film{
  padding:34px 14px;background:#222;border-radius:4px;
  background-image:
    radial-gradient(circle, #faf7f2 2.5px, transparent 3px),
    radial-gradient(circle, #faf7f2 2.5px, transparent 3px);
  background-size:16px 16px, 16px 16px;
  background-position:12px 10px, 12px calc(100% - 10px);
  background-repeat:repeat-x, repeat-x;
}

/* 8. 复古米色 vintage */
.photo-frame.frame-vintage{
  background:#f3e6cf;padding:14px 14px 46px;border:1px solid #d0b98a;box-shadow:0 4px 12px rgba(90,60,20,.2);border-radius:2px
}
.photo-frame.frame-vintage::after{
  content:attr(data-caption);position:absolute;left:0;right:0;bottom:12px;text-align:center;
  color:#8a6a3d;font-family:"Noto Serif SC",serif;font-size:13px;letter-spacing:2px
}

/* 9. 圆形 circle */
.photo-frame.frame-circle{
  background:transparent;border-radius:50%;aspect-ratio:1;align-self:center;justify-self:center;
  box-shadow:0 0 0 4px #fff, 0 10px 22px rgba(0,0,0,.18)
}
.photo-frame.frame-circle .ph{border-radius:50%}

/* 10. 胶带 (Washi tape) */
.photo-frame.frame-tape{
  background:#fff;padding:10px;box-shadow:0 6px 18px rgba(0,0,0,.1);border-radius:2px
}
.photo-frame.frame-tape::before, .photo-frame.frame-tape::after{
  content:"";position:absolute;top:-10px;width:72px;height:22px;
  background:repeating-linear-gradient(45deg,rgba(255,200,150,.75) 0 6px,rgba(255,170,110,.65) 6px 12px);
  box-shadow:0 2px 4px rgba(0,0,0,.12);border-radius:1px
}
.photo-frame.frame-tape::before{left:20px;transform:rotate(-6deg)}
.photo-frame.frame-tape::after{right:20px;transform:rotate(6deg);background:repeating-linear-gradient(45deg,rgba(180,220,255,.8) 0 6px,rgba(140,200,255,.7) 6px 12px)}

/* 11. 邮票 stamp —— 使用 SVG mask 做齿孔边缘 */
.photo-frame.frame-stamp{
  background:#fff;padding:14px;
  -webkit-mask-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' preserveAspectRatio='none'><defs><mask id='m'><rect width='20' height='20' fill='white'/><circle cx='0' cy='10' r='1.6' fill='black'/><circle cx='20' cy='10' r='1.6' fill='black'/><circle cx='10' cy='0' r='1.6' fill='black'/><circle cx='10' cy='20' r='1.6' fill='black'/></mask></defs><rect width='20' height='20' fill='white' mask='url(%23m)'/></svg>");
          mask-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' preserveAspectRatio='none'><defs><mask id='m'><rect width='20' height='20' fill='white'/><circle cx='0' cy='10' r='1.6' fill='black'/><circle cx='20' cy='10' r='1.6' fill='black'/><circle cx='10' cy='0' r='1.6' fill='black'/><circle cx='10' cy='20' r='1.6' fill='black'/></mask></defs><rect width='20' height='20' fill='white' mask='url(%23m)'/></svg>");
  -webkit-mask-size:100% 100%;mask-size:100% 100%;
  filter:drop-shadow(0 6px 14px rgba(0,0,0,.18))
}

/* 12. 暗相框 dark */
.photo-frame.frame-dark{
  background:#1f1b16;padding:14px;border-radius:4px;
  box-shadow:0 10px 22px rgba(0,0,0,.35), inset 0 0 0 1px rgba(255,255,255,.06)
}

/* 13. 圆角阴影 soft */
.photo-frame.frame-soft{
  background:#fff;padding:0;border-radius:24px;box-shadow:0 14px 28px rgba(0,0,0,.12)
}
.photo-frame.frame-soft .ph{border-radius:24px}

/* 14. 虚线描边 dashed */
.photo-frame.frame-dashed{
  background:transparent;padding:14px;border:2px dashed #c89b6c;border-radius:4px
}

/* 15. 撕纸效果 torn */
.photo-frame.frame-torn{
  background:#fff;padding:12px;
  filter: drop-shadow(0 10px 22px rgba(0,0,0,.12));
  clip-path: polygon(
    0% 3%, 5% 0%, 12% 3%, 22% 1%, 32% 3%, 42% 0%, 55% 3%, 68% 0%, 80% 3%, 92% 1%, 100% 3%,
    98% 20%, 100% 40%, 97% 60%, 100% 80%, 98% 97%,
    92% 100%, 80% 97%, 68% 100%, 55% 97%, 42% 100%, 32% 97%, 22% 100%, 12% 97%, 5% 100%, 0% 97%,
    3% 80%, 0% 60%, 3% 40%, 0% 20%
  );
}

/* ==========================================================================
   特殊设计页：序言 / 鸣谢 / 版权
   与普通 page-root 共享纸张主题，内部布局独立
   ========================================================================== */
.special-page{display:flex;align-items:stretch;justify-content:stretch}
.special-inner{
  flex:1;display:flex;flex-direction:column;justify-content:center;align-items:center;
  padding:90px 80px;text-align:center;gap:18px
}
.special-label{
  font-size:12px;color:var(--muted);letter-spacing:6px;text-transform:uppercase
}
.special-title{
  font-size:42px;margin:0;font-weight:400;letter-spacing:8px;color:#212529
}
.special-page .divider{
  width:60px;height:1px;background:#212529;margin:12px 0 22px
}
.special-text{
  font-size:17px;line-height:2.1;color:#3a3a3a;white-space:pre-wrap;max-width:460px;text-align:justify
}
.special-sign{
  font-size:15px;color:var(--muted);margin-top:22px;align-self:flex-end
}

/* 版权页 */
.copyright-page .copyright-inner{justify-content:flex-start;padding-top:140px}
.cr-title{font-size:24px;margin:0;letter-spacing:2px;font-weight:600}
.cr-sub{font-size:13px;color:var(--muted);letter-spacing:4px;margin-top:4px}
.cr-table{display:grid;grid-template-columns:auto 1fr;gap:10px 22px;margin:40px 0;width:340px;text-align:left}
.cr-table dt{color:var(--muted);font-size:13px;letter-spacing:2px}
.cr-table dd{margin:0;font-size:14px;color:#212529}
.cr-note{font-size:13px;color:var(--muted);line-height:1.8;margin-top:20px}
.cr-brand{margin-top:auto;font-size:12px;letter-spacing:4px;color:var(--muted)}

/* 夜色主题下的特殊页 */
.special-page.paper-dark .special-title,
.special-page.paper-dark .cr-title{color:#f6efe1}
.special-page.paper-dark .divider{background:#f6efe1}
.special-page.paper-dark .special-text,
.special-page.paper-dark .cr-table dd{color:#f6efe1}

/* mini 模式下压缩 */
.special-page.mini .special-inner{padding:10px;gap:3px}
.special-page.mini .special-label{font-size:4px;letter-spacing:1px}
.special-page.mini .special-title{font-size:9px;letter-spacing:2px}
.special-page.mini .divider{width:20px;margin:3px 0 6px}
.special-page.mini .special-text{font-size:4px;line-height:1.4;max-width:none}
.special-page.mini .special-sign{font-size:4px}
.special-page.mini .cr-title{font-size:7px}
.special-page.mini .cr-sub{font-size:4px}
.special-page.mini .cr-table{width:auto;gap:2px;margin:6px 0}
.special-page.mini .cr-table dt, .special-page.mini .cr-table dd{font-size:4px}
.special-page.mini .cr-note,.special-page.mini .cr-brand{font-size:3px}
.special-page.mini .copyright-inner{padding-top:20px}

/* mini 缩略图（侧边页面列表用） */
.mini .photo-frame{transform:none!important;padding:2px!important}
.mini .photo-frame.frame-polaroid{padding:2px 2px 10px!important}
.mini .photo-frame.frame-tape::before,
.mini .photo-frame.frame-tape::after{display:none}
.mini .layout-root{padding:6px 6px 8px;gap:4px}
.mini .layout-photos{gap:4px}
.mini .layout-text{display:none}
.mini .page-page-number{display:none}
.mini .page-title{display:none}
.mini .page-date{display:none}
.mini .cover-title{font-size:10px!important;margin:0}
.mini .cover-sub{font-size:6px!important;margin:0;letter-spacing:1px!important}
.mini .cover-author{font-size:5px!important;letter-spacing:0!important}
.mini .cover-texts{padding:6px!important}
.mini .cover-root.cover-polaroid .cover-photo{top:6px;left:50%;width:60%;height:60%;border-width:2px;border-bottom-width:10px;padding:0}
.mini .cover-root.cover-minimal .cover-photo{top:6px;left:6px;right:6px;bottom:28px}
.mini .cover-root.cover-letter::before{inset:3px}
.mini .cover-root.cover-letter::after{inset:5px}
.mini .cover-letter .cover-photo{top:10px;left:10px;right:10px;bottom:28px}