/* ========== sections.css · 各章节版式 ========== */
.section{position:relative;padding:11vh 20px}

/* ---------- 扉页 Hero ---------- */
.hero{min-height:100vh;min-height:100svh;display:flex;flex-direction:column;
      align-items:center;justify-content:center;text-align:center;padding:0 20px}
.hero-eyebrow{font-family:'Cormorant Infant','Noto Serif SC',serif;font-size:.8rem;
              letter-spacing:.55em;text-indent:.55em;color:#ab9066}
.hero h1{margin-top:24px;font-size:clamp(2.1rem,1.4rem + 4vw,3.4rem);
         font-weight:500;letter-spacing:.16em;text-indent:.16em;line-height:1.5}
.hero-poem{margin-top:22px;color:var(--ink-soft);font-size:1rem;letter-spacing:.5em;text-indent:.5em}
.hero-days{margin-top:52px;display:flex;flex-direction:column;align-items:center;gap:10px}
.days-label{font-size:.9rem;letter-spacing:.4em;text-indent:.4em;color:var(--muted)}
.days-row{display:flex;align-items:baseline;gap:12px}
.days-num{font-family:'Cormorant Infant','Noto Serif SC',serif;font-weight:500;
          font-size:clamp(3rem,2.2rem + 3.5vw,4.6rem);line-height:1}
.days-unit{font-size:1.05rem;color:var(--ink-soft);letter-spacing:.2em}
.scroll-hint{position:absolute;bottom:4.5vh;left:50%;transform:translateX(-50%);
             display:flex;flex-direction:column;align-items:center;gap:10px;
             color:#a98f6d;font-size:.75rem;letter-spacing:.4em;text-indent:.4em}
.scroll-hint svg{width:18px;height:18px;animation:chev 2.2s ease-in-out infinite}

/* ---------- 章节标题 ---------- */
.sec-head{text-align:center;margin-bottom:56px}
.sec-en{display:block;font-family:'Cormorant Infant','Noto Serif SC',serif;font-size:.78rem;
        letter-spacing:.5em;text-indent:.5em;color:#ab9066}
.sec-title{margin-top:12px;font-size:clamp(1.5rem,1.2rem + 1.6vw,2.1rem);
           font-weight:500;letter-spacing:.24em;text-indent:.24em;color:var(--ink)}
.sec-line{width:130px;height:auto;margin-top:16px}
.sec-sub{text-align:center;color:var(--muted);letter-spacing:.26em;font-size:.88rem;
         margin:-32px auto 48px}

/* ---------- 情书信纸 ---------- */
.letter-sec{padding:4vh 20px 12vh}
.letter{position:relative;max-width:720px;margin:0 auto;
        background:linear-gradient(180deg,rgba(255,253,248,.96),rgba(255,250,243,.97));
        border:1px solid var(--line);border-radius:14px;
        padding:clamp(46px,7vw,88px) clamp(26px,6.5vw,76px);
        box-shadow:0 30px 80px -32px rgba(150,105,70,.35),0 6px 24px rgba(160,120,80,.08)}
.letter::before{content:'';position:absolute;inset:13px;border:1px solid rgba(185,138,68,.22);
                border-radius:9px;pointer-events:none}
.postmark{position:absolute;top:30px;right:34px;width:86px;height:86px;opacity:.2;
          transform:rotate(-12deg);pointer-events:none}
.orn{width:150px;height:auto;display:block;margin:0 auto 8px;opacity:.9}
.letter h2{font-size:clamp(1.9rem,1.35rem + 3.2vw,2.9rem);font-weight:500;
           letter-spacing:.14em;text-indent:.14em;line-height:1.5;margin-top:10px;text-align:center}
.letter .sub{font-family:'Cormorant Infant','Noto Serif SC',serif;font-size:.72rem;
     letter-spacing:.5em;text-indent:.5em;color:#ab9066;margin-top:14px;text-align:center}
.flourish{width:min(240px,62vw);height:auto;display:block;margin:22px auto 46px}
.salute{font-size:clamp(1.12rem,1.06rem + .3vw,1.28rem);font-weight:500;letter-spacing:.1em;
        margin-bottom:1.7em;text-indent:0}
.letter p.body-p{font-size:clamp(1.06rem,1rem + .4vw,1.2rem);line-height:2.25;letter-spacing:.045em;
          text-align:justify;text-indent:2em;font-weight:400;color:var(--ink);margin-bottom:1.65em}
.hl{font-style:normal;color:var(--gold-deep);font-weight:500;
    border-bottom:1px dotted rgba(185,138,68,.5);padding-bottom:2px;
    text-shadow:0 0 14px rgba(216,178,110,.35);
    transition:color .4s ease,text-shadow .4s ease}
.hl:hover,.hl:active{color:#7c5a1c;
    text-shadow:0 0 10px rgba(216,178,110,.55),0 0 26px rgba(226,190,120,.4)}
.sign{text-align:right;margin-top:2.6em}
.sign .name{font-family:'Ma Shan Zheng','KaiTi','STKaiti',cursive;
            font-size:clamp(1.5rem,1.3rem + 1vw,1.9rem);
            letter-spacing:.08em;text-indent:0;text-align:right;font-weight:400;margin-bottom:0}
.sign .date{font-size:.82rem;color:var(--muted);letter-spacing:.22em;text-indent:0;
            text-align:right;margin-top:14px;margin-bottom:0}
.endorn{width:110px;height:auto;display:block;margin:64px auto 2px;opacity:.85}

/* ---------- 时光相册 ---------- */
.gallery-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
              gap:26px;max-width:1020px;margin:0 auto}
.photo{background:var(--paper);border:1px solid var(--line);border-radius:12px;
       padding:10px 10px 14px;box-shadow:0 18px 44px -22px rgba(150,105,70,.4);
       transition:transform .45s ease,box-shadow .45s ease,rotate .45s ease}
.photo.tilt-l{rotate:-1.4deg}
.photo.tilt-r{rotate:1.4deg}
.photo:hover{transform:translateY(-6px);rotate:0deg;
             box-shadow:0 26px 54px -22px rgba(150,105,70,.5)}
.ph-wrap{overflow:hidden;border-radius:8px;background:#f6ecdf}
.ph-wrap img{width:100%;aspect-ratio:4/5;object-fit:cover;display:block;filter:saturate(.97)}
.photo.wide .ph-wrap img{aspect-ratio:4/3}
.photo figcaption{margin-top:10px;text-align:center;font-size:.88rem;
                  color:var(--ink-soft);letter-spacing:.14em}

/* ---------- 我们的故事（时间轴） ---------- */
.tl{position:relative;max-width:860px;margin:0 auto;list-style:none;padding:6px 0}
.tl::before{content:'';position:absolute;left:50%;top:0;bottom:0;width:2px;transform:translateX(-50%);
            background:linear-gradient(180deg,transparent,rgba(185,138,68,.45) 10%,rgba(185,138,68,.45) 90%,transparent)}
.tl-item{position:relative;width:50%;padding:0 46px 54px 0}
.tl-item:nth-child(even){left:50%;padding:0 0 54px 46px}
.tl-item::before{content:'';position:absolute;top:26px;width:14px;height:14px;border-radius:50%;
                 background:#fffcf6;border:2px solid var(--gold);
                 box-shadow:0 0 0 4px rgba(185,138,68,.12)}
.tl-item:nth-child(odd)::before{right:-8px}
.tl-item:nth-child(even)::before{left:-8px}
.tl-card{background:var(--paper);border:1px solid var(--line);border-radius:12px;
         padding:22px 26px;box-shadow:0 14px 34px -20px rgba(150,105,70,.4);
         transition:transform .45s ease,box-shadow .45s ease}
.tl-card:hover{transform:translateY(-4px);box-shadow:0 20px 42px -20px rgba(150,105,70,.5)}
.tl-date{font-family:'Cormorant Infant','Noto Serif SC',serif;font-size:.95rem;
         letter-spacing:.3em;color:var(--gold-deep)}
.tl-card h3{font-size:1.15rem;margin:8px 0 8px;letter-spacing:.18em;font-weight:500}
.tl-card p{font-size:.95rem;color:var(--ink-soft);line-height:2.05;letter-spacing:.04em}

/* ---------- 想对你说（卡片墙） ---------- */
.wish-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));
           gap:22px;max-width:1000px;margin:0 auto;padding:0 4px}
.wish{aspect-ratio:4/5;background:transparent;border:0;cursor:pointer;padding:0;
      perspective:900px;transition:transform .35s ease}
.wish:hover{transform:translateY(-3px)}
.wish:focus-visible{outline:2px solid var(--gold);outline-offset:4px;border-radius:12px}
.wish-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;
            transition:transform .8s cubic-bezier(.25,.7,.25,1)}
.wish.flip .wish-inner{transform:rotateY(180deg)}
.w-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;
        border-radius:12px;display:flex;flex-direction:column;align-items:center;
        justify-content:center;gap:14px;padding:20px}
.w-front{background:linear-gradient(180deg,rgba(255,253,248,.94),rgba(255,248,240,.95));
         border:1px solid var(--line);box-shadow:0 14px 34px -18px rgba(150,105,70,.35)}
.w-back{transform:rotateY(180deg);background:linear-gradient(160deg,#fdf3ee,#f6ecf4);
        border:1px solid rgba(200,160,105,.35);box-shadow:0 14px 34px -18px rgba(150,105,70,.3)}
.w-num{font-family:'Cormorant Infant',serif;font-style:italic;font-size:1.9rem;color:#cba76b;line-height:1}
.w-hint{font-size:.72rem;letter-spacing:.3em;text-indent:.3em;color:var(--muted)}
.w-text{font-size:1.02rem;line-height:2.05;letter-spacing:.05em;color:var(--ink);text-align:center}
.w-heart{width:16px;height:16px;fill:rgba(201,138,146,.7)}

/* ---------- 结尾 ---------- */
.ending{min-height:88vh;min-height:88svh;display:flex;flex-direction:column;
        align-items:center;justify-content:center;text-align:center}
.end-title{font-size:clamp(1.8rem,1.2rem + 3.4vw,2.8rem);font-weight:500;
           letter-spacing:.18em;text-indent:.18em;line-height:1.6}
.end-sub{margin-top:16px;color:var(--muted);letter-spacing:.32em;text-indent:.32em;font-size:.9rem}
.heart-btn{margin-top:46px;width:92px;height:92px;border-radius:50%;cursor:pointer;position:relative;
           border:1px solid rgba(200,120,130,.35);
           background:radial-gradient(circle at 35% 30%,#fdeef0,#f7dcdf);
           display:flex;align-items:center;justify-content:center;
           box-shadow:0 16px 40px -14px rgba(180,90,100,.4);transition:transform .3s ease}
.heart-btn:hover{transform:scale(1.05)}
.heart-btn:focus-visible{outline:2px solid var(--rose-deep);outline-offset:4px}
.heart-btn svg{width:42px;height:42px;fill:#c26a76;
               filter:drop-shadow(0 3px 6px rgba(170,80,90,.35))}
.heart-btn.beat svg{animation:beat .55s ease}
.beat-count{margin-top:20px;font-size:.85rem;color:var(--muted);letter-spacing:.2em}
.burst-p{position:fixed;z-index:45;pointer-events:none;border-radius:50%;opacity:.95;
         animation:burstUp 1.15s ease-out forwards}

/* ---------- 侧边导航点（仅桌面） ---------- */
.dotnav{position:fixed;right:26px;top:50%;transform:translateY(-50%);z-index:30;
        display:flex;flex-direction:column;gap:16px}
.dotnav .dot{width:9px;height:9px;border-radius:50%;background:rgba(185,138,68,.28);
             position:relative;transition:background .3s,transform .3s,box-shadow .3s;cursor:pointer}
.dotnav .dot:hover,.dotnav .dot.active{background:var(--gold);transform:scale(1.3);
             box-shadow:0 0 0 4px rgba(185,138,68,.14)}
.dotnav .dot::after{content:attr(data-label);position:absolute;right:20px;top:50%;
             transform:translateY(-50%);font-size:.75rem;color:#8f7355;letter-spacing:.2em;
             white-space:nowrap;opacity:0;transition:opacity .3s;pointer-events:none;
             background:rgba(255,252,246,.92);padding:4px 10px;border-radius:8px;
             border:1px solid var(--line)}
.dotnav .dot:hover::after{opacity:1}

/* ---------- 页脚 ---------- */
.site-foot{text-align:center;padding:5vh 18px calc(6vh + env(safe-area-inset-bottom));
           color:var(--muted);font-size:.82rem;letter-spacing:.3em}
.site-foot svg{width:13px;height:13px;vertical-align:-2px;margin-right:8px;
               fill:rgba(201,138,146,.8)}

/* ---------- 响应式 ---------- */
@media (max-width:1023px){.dotnav{display:none}}
@media (max-width:768px){
  .tl::before{left:18px;transform:none}
  .tl-item{width:100%;padding:0 0 44px 52px}
  .tl-item:nth-child(even){left:0;padding:0 0 44px 52px}
  .tl-item::before{left:11px;right:auto}
  .tl-item:nth-child(odd)::before{right:auto;left:11px}
}
@media (max-width:560px){
  .postmark{display:none}
  .section{padding:10vh 16px}
  .letter-sec{padding:3vh 14px 11vh}
  .wish{aspect-ratio:4/3}
  .wish-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}
}