/* ============================================================
   文润草湖 · 影记铸魂 —— 翰墨红章设计系统
   纸 / 墨 / 朱砂 / 描金
   ============================================================ */

:root {
  --paper:    #FAF6EC;
  --paper-2:  #F2EAD8;
  --paper-3:  #EAE0C8;
  --ink:      #2E2720;
  --ink-soft: #4A4136;
  --ink-mute: #6E6252;
  --red:      #B01E2E;
  --red-deep: #8E1724;
  --red-soft: #C8444F;
  --gold:     #C2A25B;
  --gold-deep:#A3813F;
  --gold-line:rgba(163,129,63,.38);
  --paper-rgb:250,246,236;

  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",STSong,"SimSun",serif;
  --sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;

  --ease:cubic-bezier(.22,.61,.36,1);
  --shadow:0 18px 48px rgba(60,46,22,.14);
  --hairline:1px solid var(--gold-line);
}

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

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}

body{
  font-family:var(--sans);
  font-weight:300;
  color:var(--ink);
  background:var(--paper);
  line-height:1.9;
  letter-spacing:.02em;
  overflow-x:hidden;
}

/* 宣纸颗粒 */
body::before{
  content:"";position:fixed;inset:0;z-index:9;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='linear' slope='0.045'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
::selection{background:var(--red);color:var(--paper)}

img{max-width:100%}
figure{position:relative;overflow:hidden;background:var(--paper-3)}
figure img{display:block;width:100%;height:100%;object-fit:cover}
a{color:inherit;text-decoration:none}

.skip{
  position:fixed;top:-60px;left:16px;z-index:99;background:var(--red);color:#fff;
  padding:.5em 1.2em;font-size:.9rem;transition:top .3s;border-radius:2px
}
.skip:focus{top:12px}

button{cursor:pointer;font-family:inherit}

.wrap{width:min(1180px,92vw);margin-inline:auto}
.dot{padding:0 .45em;color:var(--gold-deep)}

/* ---------------- 顶部导航 ---------------- */
.masthead{
  position:fixed;inset:0 0 auto;z-index:60;
  transition:background .45s var(--ease),box-shadow .45s;
}
.masthead-inner{
  width:min(1280px,94vw);margin-inline:auto;
  display:flex;align-items:center;justify-content:space-between;gap:2rem;
  padding:.9rem .2rem;
}
.brand{display:flex;align-items:center;gap:.75rem}
.brand-seal{
  width:2.6rem;height:2.6rem;flex:none;display:grid;place-items:center;
  font-family:var(--serif);font-size:1.15rem;color:#FDF3DE;
  background:linear-gradient(160deg,var(--red),var(--red-deep));
  border-radius:.4rem;box-shadow:0 0 0 1px rgba(253,243,222,.55) inset,0 4px 10px rgba(142,23,36,.35);
}
.brand-text{line-height:1.25}
.brand-text b{
  display:block;font-family:var(--serif);font-size:.98rem;font-weight:600;letter-spacing:.12em
}
.brand-text i{display:block;font-style:normal;font-size:.72rem;opacity:.85;letter-spacing:.3em}
.chnav{display:flex;gap:.4rem;align-items:center}
.chnav a{
  padding:.42em 1.05em;font-size:.92rem;font-weight:400;letter-spacing:.18em;border-radius:99px;
  transition:color .3s,background .3s,border-color .3s;
}
.chnav a:hover{color:var(--red)}
.chnav a.is-active{background:rgba(176,30,46,.08);color:var(--red);font-weight:500}

/* 未滚动(压图状态) */
.masthead.at-top .brand-text,.masthead.at-top .chnav a{color:#F7EED9;text-shadow:0 1px 8px rgba(20,12,4,.5)}
.masthead.at-top .chnav a:hover{background:rgba(250,246,236,.14)}
.masthead.at-top .chnav a.is-active{background:rgba(250,246,236,.18);color:#fff}
/* 滚动后(纸底状态) */
.masthead.scrolled{
  background:rgba(var(--paper-rgb),.88);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:var(--hairline);
  box-shadow:0 6px 24px rgba(60,46,22,.08);
}

/* ---------------- 卷首 Hero ---------------- */
.hero{
  position:relative;min-height:100svh;display:flex;flex-direction:column;
  align-items:center;justify-content:center;text-align:center;
  padding:8rem 1rem 7rem;overflow:hidden;
}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{animation:kenburns 22s var(--ease) both}
@keyframes kenburns{from{transform:scale(1.12)}to{transform:scale(1)}}
.hero-scrim{
  position:absolute;inset:0;display:block;
  background:
    linear-gradient(180deg,rgba(24,17,9,.62) 0%,rgba(24,17,9,.18) 26%,rgba(24,17,9,.05) 48%,rgba(24,17,9,.32) 78%,rgba(30,22,13,.66) 100%),
    linear-gradient(90deg,rgba(24,17,9,.30) 0%,transparent 30%,transparent 70%,rgba(24,17,9,.30) 100%);
}
.hero-kicker{
  display:flex;align-items:center;gap:1.2rem;
  color:#EFE3C4;font-size:clamp(.78rem,1.5vw,1.02rem);letter-spacing:.42em;
  text-shadow:0 1px 10px rgba(0,0,0,.55);
}
.rule{width:clamp(2rem,6vw,5rem);height:1px;background:linear-gradient(90deg,transparent,#D8C08A);display:inline-block}
.rule:last-child{background:linear-gradient(90deg,#D8C08A,transparent)}
.hero-title{
  margin:.6em 0 .35em;color:#FBF3DE;font-family:var(--serif);font-weight:900;
  text-shadow:0 4px 30px rgba(0,0,0,.45);
}
.hero-title .ht1,.hero-title .ht2{display:block;line-height:1.22}
.hero-title .ht1{font-size:clamp(2.9rem,8.6vw,7.2rem);letter-spacing:.32em;text-indent:.32em}
.hero-title .ht2{
  font-size:clamp(2.9rem,8.6vw,7.2rem);letter-spacing:.44em;text-indent:.44em;
  color:transparent;
  background:linear-gradient(105deg,#F3E2B2 10%,#FFF6DD 38%,#D8B877 66%,#F3E2B2 92%);
  -webkit-background-clip:text;background-clip:text;
}
.hero-sub{
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
  margin-top:.2rem;
}
.hs-unit{
  font-family:var(--sans);font-weight:300;letter-spacing:.3em;
  font-size:clamp(.78rem,1.5vw,1.02rem);color:#E6D9B8;
  text-shadow:0 1px 8px rgba(0,0,0,.5);
}
.hs-name{
  font-family:var(--serif);font-weight:600;letter-spacing:.22em;
  font-size:clamp(1.02rem,2.4vw,1.6rem);color:#F5EAD0;
  text-shadow:0 2px 12px rgba(0,0,0,.5);
}
.hero-meta{
  margin-top:.9em;color:#DCCFAE;letter-spacing:.34em;font-size:clamp(.72rem,1.4vw,.95rem);
  text-shadow:0 1px 8px rgba(0,0,0,.5);
}
.hero-side{position:absolute;right:clamp(.8rem,3vw,2.6rem);top:50%;transform:translateY(-50%);display:flex;flex-direction:column;align-items:center;gap:1.4rem;z-index:0;pointer-events:none}
.vtext{
  writing-mode:vertical-rl;letter-spacing:.62em;color:#E9DCBA;font-size:.86rem;
  text-shadow:0 1px 8px rgba(0,0,0,.5);
}
/* 竖排题词:水印化叠层(与内容重合时呈现印染质感),窄屏/矮屏自动隐藏 */
.hero-side .vtext{
  opacity:.38;font-size:1.08rem;color:#EFE3C0;letter-spacing:.7em;
  filter:blur(.3px);text-shadow:0 2px 14px rgba(0,0,0,.35);
}
@media (max-width:1399px),(max-height:799px){
  .hero-side .vtext{display:none}
}
.hero-scroll{
  position:absolute;bottom:4.4rem;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:.5rem;
  color:#E7D9B4;font-size:.74rem;letter-spacing:.6em;text-indent:.6em;
}
.hero-scroll i{width:1px;height:3rem;background:linear-gradient(180deg,#E7D9B4,transparent);overflow:hidden;position:relative}
.hero-scroll i::after{
  content:"";position:absolute;top:-40%;left:-1px;width:3px;height:38%;border-radius:3px;
  background:#F5E6BF;animation:scrolldrip 1.9s var(--ease) infinite;
}
@keyframes scrolldrip{to{transform:translateY(3.2rem)}}
.mountains{position:absolute;left:0;right:0;bottom:-1px;width:100%;height:clamp(120px,20vh,240px);z-index:0;display:block;pointer-events:none}
.hero .hero-kicker,.hero .hero-title,.hero .hero-sub,.hero .hero-meta,.hero .hero-side,.hero .hero-scroll{position:relative;z-index:1}

/* ---------------- 成果速览 ---------------- */
.stats{
  background:linear-gradient(180deg,var(--paper) 0%,var(--paper-2) 100%);
  padding:4.5rem 0 2.2rem;
}
.stats-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1rem 1.6rem;
}
.stat{text-align:center;padding:.4rem .2rem;position:relative}
.stat::before{
  content:"";position:absolute;top:-.2rem;left:50%;transform:translateX(-50%);
  width:2.4rem;height:2px;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);
}
.num{
  display:block;font-family:var(--serif);font-weight:700;line-height:1.05;
  font-size:clamp(2.6rem,5.4vw,4.2rem);
  color:transparent;
  background:linear-gradient(180deg,var(--red) 0%,var(--red-deep) 88%);
  -webkit-background-clip:text;background-clip:text;
  font-variant-numeric:tabular-nums;
}
.num em{font-style:normal;font-size:.34em;color:var(--ink-mute);-webkit-text-fill-color:var(--ink-mute);padding-left:.2em;letter-spacing:.1em}
.cap{display:block;font-style:normal;color:var(--ink-mute);font-size:clamp(.7rem,1.15vw,.88rem);letter-spacing:.16em;margin-top:.55rem;line-height:1.7}
.stats-note{text-align:center;color:var(--gold-deep);font-size:.72rem;letter-spacing:.08em;margin-top:1.6rem;opacity:.9}

/* ---------------- 卷首语 ---------------- */
.prelude{background:var(--paper-2);padding:5.5rem 0}
.prelude-grid{display:grid;grid-template-columns:150px 1fr;gap:2.5rem}
.prelude-side{display:flex;flex-direction:column;align-items:center;gap:1.5rem;border-right:var(--hairline);padding-right:1.8rem}
.seal-sm{
  writing-mode:horizontal-tb;font-family:var(--serif);font-size:1.02rem;font-weight:600;color:var(--red);
  padding:.35em 1em;border:2px solid currentColor;border-radius:.35rem;
  box-shadow:0 0 0 3px var(--paper-2),0 0 0 5px var(--red);display:inline-block;letter-spacing:.3em;text-indent:.3em;
}
.vtext-tall{color:var(--ink-mute)}
.prelude-quote p{font-family:var(--serif);font-weight:600;font-size:clamp(1.3rem,3vw,2.1rem);line-height:2;letter-spacing:.08em}
.prelude-quote p+p{margin-top:.6em;font-weight:400;color:var(--ink-soft)}
.q-red{color:var(--red);font-weight:700}
.prelude-quote footer{margin-top:1.4rem;font-style:normal;letter-spacing:.3em;color:var(--gold-deep);font-size:.85rem;text-align:right}

/* ---------------- 章节通用 ---------------- */
.chapter{padding:6.5rem 0 7rem;background:var(--paper)}
.chapter-head{display:grid;grid-template-columns:auto 1fr;grid-template-areas:"no title" "no intro";column-gap:2.6rem;row-gap:1.6rem;margin-bottom:4.2rem;position:relative}
.chapter-head::after{
  content:"";grid-column:1/-1;height:1px;margin-top:.4rem;
  background:linear-gradient(90deg,var(--gold),rgba(194,162,91,.25) 55%,transparent);
}
.ch-no{grid-area:no;display:grid;place-items:center}
.ch-no span{
  writing-mode:vertical-rl;font-family:var(--serif);font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:600;
  color:var(--paper);padding:.5rem .32rem;letter-spacing:.2em;
  background:linear-gradient(160deg,var(--red),var(--red-deep));
  border-radius:.4rem;box-shadow:0 0 0 1px rgba(250,246,236,.6) inset;
}
.ch-no i{
  writing-mode:vertical-rl;font-style:normal;font-size:.8rem;letter-spacing:.5em;
  color:var(--gold-deep);margin-top:.9rem;
}
.ch-title{grid-area:title;align-self:end}
.ch-title h2{font-family:var(--serif);font-size:clamp(2.2rem,5.6vw,4rem);font-weight:900;letter-spacing:.24em;text-indent:.24em;line-height:1.2}
.ch-en{color:var(--gold-deep);font-size:.72rem;letter-spacing:.42em;margin-top:.9rem;font-weight:500}
.ch-intro{grid-area:intro;color:var(--ink-soft);font-size:clamp(.95rem,1.7vw,1.12rem);line-height:2.1;max-width:52ch;border-left:2px solid var(--red);padding-left:1.4rem;align-self:start}

/* ---------------- 卷一 · 图文交替 ---------------- */
.feature{
  display:grid;grid-template-columns:7fr 5fr;gap:clamp(2rem,5vw,4.2rem);
  align-items:center;margin-bottom:5rem;
}
.feature-flip .f-text{order:-1;text-align:right}
.feature-flip .f-photo::after{right:auto;left:-1.1rem}
.f-photo::before,.f-photo::after{content:"";position:absolute;border:1px solid var(--gold-line);z-index:1}
.f-photo::before{inset:.9rem;-webkit-mask:linear-gradient(#000 0 0);pointer-events:none}
.f-photo::after{right:-1.1rem;bottom:-1.1rem;width:46%;height:46%;border-top:0;border-left:0}
.f-photo img{aspect-ratio:4/3;transition:transform 1.2s var(--ease)}
.feature:hover .f-photo img{transform:scale(1.045)}
.f-text{position:relative;padding-block:1rem}
.f-index{
  font-family:var(--serif);font-size:1rem;letter-spacing:.3em;color:var(--gold-deep);
  border-bottom:1px solid var(--gold-line);padding-bottom:.9rem;display:inline-block;margin-bottom:1.6rem;
}
.feature-flip .f-index{text-align:right}
.f-text h3{font-family:var(--serif);font-size:clamp(1.5rem,3.1vw,2.3rem);font-weight:700;letter-spacing:.14em;margin-bottom:1rem;color:var(--ink)}
.f-text p{color:var(--ink-soft);font-size:clamp(.95rem,1.6vw,1.06rem);line-height:2.15}

/* 纪实小墙 */
.mini-wall{display:grid;grid-template-columns:repeat(12,1fr);grid-auto-rows:clamp(160px,21vw,250px);gap:.9rem}
.mw{grid-column:span 3}
.mw-1,.mw-6{grid-column:span 6}
.mw img{transition:transform 1.1s var(--ease),filter .5s}
.mw:hover img{transform:scale(1.06)}
.mw figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:.8em 1.1em;
  color:#F6EDD8;font-size:clamp(.72rem,1.3vw,.9rem);letter-spacing:.14em;
  background:linear-gradient(180deg,transparent,rgba(30,23,13,.82));
  opacity:0;transform:translateY(8px);transition:.45s var(--ease);
}
.mw:hover figcaption,.mw:focus-within figcaption{opacity:1;transform:none}
.mw img{cursor:zoom-in}

/* ---------------- 墨色章节(卷二·手记) ---------------- */
.chapter-ink{
  background:
    radial-gradient(1200px 520px at 85% -10%,rgba(194,162,91,.13),transparent 60%),
    radial-gradient(900px 480px at -10% 108%,rgba(176,30,46,.10),transparent 55%),
    linear-gradient(175deg,#26201A 0%,#1D1813 55%,#201A15 100%);
  color:#EDE3CB;
}
.chapter-ink .ch-title h2{color:#F4EADA}
.chapter-ink .ch-en{color:#D0AF72}
.chapter-ink .ch-intro{color:#CFC4AC;border-left-color:var(--red)}
.chapter-ink .chapter-head::after{background:linear-gradient(90deg,var(--gold),rgba(194,162,91,.14) 55%,transparent)}

/* 一方水土 横幅 */
.land-scroll{display:grid;grid-template-columns:repeat(12,1fr);grid-auto-rows:clamp(170px,17vh,240px);gap:.9rem;margin-bottom:.9rem}
.ls{grid-column:span 4}
.ls-1{grid-column:1/-1;height:clamp(300px,52vh,540px)}
.ls figcaption,.land-quad figcaption{
  position:absolute;left:1rem;bottom:1rem;z-index:2;
  color:#F4E9CE;font-family:var(--serif);letter-spacing:.24em;font-size:.92rem;
  padding:.28em .5em;text-shadow:0 1px 6px rgba(0,0,0,.6);
}
.ls figcaption::before{content:"";position:absolute;inset:0;border-left:3px solid var(--red);background:rgba(20,14,8,.3);z-index:-1}
.land-quad{display:grid;grid-template-columns:repeat(2,1fr);grid-auto-rows:clamp(190px,26vw,300px);gap:.9rem}
.land-quad img{transition:transform 1.1s var(--ease)}
.land-quad figure:hover img{transform:scale(1.05)}
.land-quad figure img{cursor:zoom-in}

/* ---------------- 卷三 · 百张笑脸 ---------------- */
.tap-hint{text-align:center;color:var(--ink-mute);letter-spacing:.24em;font-size:.85rem;margin-bottom:1.6rem}
.tap-hint .dot{color:var(--red)}
.smile-grid{display:grid;grid-template-columns:repeat(12,1fr);grid-auto-rows:clamp(120px,15vw,190px);gap:.7rem}
.smile{position:relative;overflow:hidden;background:var(--paper-3);cursor:zoom-in;outline-offset:-2px}
.smile img{width:100%;height:100%;object-fit:cover;transition:transform 1s var(--ease),filter .5s;filter:saturate(.92)}
.smile:hover img{transform:scale(1.07);filter:saturate(1.08)}
.smile::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(190deg,transparent 62%,rgba(40,26,12,.4));
  opacity:0;transition:.4s;
}
.smile:hover::after{opacity:1}
.smile span{
  position:absolute;left:.75rem;bottom:.55rem;z-index:1;color:#F7EDD7;
  font-family:var(--serif);font-size:.68rem;letter-spacing:.24em;
  text-shadow:0 1px 5px rgba(0,0,0,.6);opacity:0;transform:translateY(4px);transition:.4s var(--ease);
}
.smile:hover span{opacity:1;transform:none}
.s-w{grid-column:span 6}
.s-m{grid-column:span 3}
.s-xl{grid-column:span 6;grid-row:span 2}
.noscript-note{padding:2rem;text-align:center;color:var(--red);border:1px dashed var(--gold-line)}
.gallery-err{
  margin:1rem auto;max-width:640px;padding:1rem 1.4rem;
  color:var(--red-deep);background:rgba(176,30,46,.07);
  border:1px dashed var(--red);border-radius:.35rem;
  font-size:.9rem;letter-spacing:.06em;line-height:1.9;text-align:center;
}

/* ---------------- 肆 · 影记图库(手卷横屏) ---------------- */
.gallery-sec{background:linear-gradient(180deg,var(--paper-2) 0%,var(--paper) 45%,var(--paper) 100%)}
.gallery-sec .chapter-head{margin-bottom:1.2rem}
.scroll-stage{overflow:visible}

/* 单卷 */
.vol{position:relative;margin-bottom:3.2rem}
.vol:last-child{margin-bottom:0}
.vol-bar{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;margin-bottom:1rem}
.vol-tag{display:flex;align-items:center;gap:.8rem}
.vol-tag i{
  writing-mode:vertical-rl;font-style:normal;font-family:var(--serif);font-weight:600;
  font-size:.8rem;color:var(--paper);letter-spacing:.35em;
  background:linear-gradient(160deg,var(--red),var(--red-deep));
  padding:.42rem .2rem;border-radius:.28rem;box-shadow:0 0 0 1px rgba(250,246,236,.6) inset;
}
.vol-tag b{font-family:var(--serif);font-size:clamp(1.15rem,2.2vw,1.55rem);font-weight:700;letter-spacing:.18em}
.vol-tag em{font-style:normal;color:var(--gold-deep);font-size:.76rem;letter-spacing:.2em;border:1px solid var(--gold-line);border-radius:99px;padding:.14em .8em}
.vol-desc{color:var(--ink-mute);font-size:.82rem;letter-spacing:.1em}
.vol-ctrl{margin-left:auto;display:flex;align-items:center;gap:.9rem}
.vol-prog{width:clamp(120px,16vw,220px);height:2px;background:rgba(46,39,32,.14);position:relative;overflow:hidden}
.vol-prog i{
  position:absolute;inset:0 auto 0 0;width:0%;
  background:linear-gradient(90deg,var(--gold),var(--red));
  transition:width .1s linear;
}
.vol-pos{font-family:var(--serif);color:var(--red);font-size:.84rem;letter-spacing:.14em;font-variant-numeric:tabular-nums;white-space:nowrap}
.vol-btn{
  width:2.2rem;height:2.2rem;border-radius:50%;flex:none;
  border:1px solid var(--gold-line);color:var(--ink);background:transparent;
  font-size:1.15rem;line-height:1;display:grid;place-items:center;
  transition:.3s;
}
.vol-btn:hover{background:var(--red);border-color:var(--red);color:var(--paper)}
.vol-btn:disabled{opacity:.35;pointer-events:none}
.vol-play{min-width:3.4em;width:auto;padding:0 .7em;border-radius:99px;font-size:.76rem;letter-spacing:.14em;color:var(--gold-deep)}
.vol-play.is-on{background:var(--red);border-color:var(--red);color:var(--paper)}
.vol-rail.is-auto{scroll-snap-type:none}

/* 卷轴轨道 */
.vol-rail{
  display:flex;align-items:flex-start;gap:.8rem;
  overflow-x:auto;overflow-y:hidden;
  scroll-snap-type:x proximity;
  padding:.6rem .6rem 1rem;
  height:clamp(300px,52vh,470px);
  scrollbar-width:none;
  cursor:grab;
  user-select:none;-webkit-user-select:none;
  background:
    linear-gradient(180deg,rgba(46,39,32,.055),rgba(46,39,32,0) 38%),
    linear-gradient(0deg,rgba(46,39,32,.05),rgba(46,39,32,0) 30%);
  border-top:var(--hairline);border-bottom:var(--hairline);
  touch-action:pan-x pan-y;
}
.vol-rail::-webkit-scrollbar{display:none}
.vol-rail.dragging{cursor:grabbing;scroll-snap-type:none}
.vol-rail.dragging .vr img{pointer-events:none}

/* 帧 */
.vr{
  flex:none;position:relative;overflow:hidden;height:100%;
  background:#FDF9EE;border-radius:3px;
  box-shadow:0 6px 18px rgba(60,46,22,.16),0 0 0 1px rgba(163,129,63,.22);
  scroll-snap-align:start;
  cursor:zoom-in;
  transition:transform .4s var(--ease),box-shadow .4s;
}
.vr img{display:block;height:100%;width:auto;max-width:none;object-fit:cover;transition:opacity .5s}
.vr img.lazy-bg{opacity:0}
.vr figcaption{
  position:absolute;left:0;right:0;bottom:0;max-height:46%;
  overflow:hidden;padding:.5em .7em .55em;
  color:#F8EFDB;font-size:.72rem;line-height:1.7;letter-spacing:.06em;
  background:linear-gradient(180deg,transparent,rgba(28,20,12,.9));
  opacity:0;transform:translateY(6px);transition:.4s var(--ease);
  pointer-events:none;
}
.vr:hover{transform:translateY(-4px);box-shadow:0 14px 30px rgba(60,46,22,.28),0 0 0 1px rgba(163,129,63,.4)}
.vr:hover figcaption,.vr:focus-visible figcaption{opacity:1;transform:none}
.vr .vr-no{
  position:absolute;right:.45rem;top:.4rem;
  font-family:var(--serif);font-size:.64rem;color:rgba(248,239,219,.85);letter-spacing:.1em;
  background:rgba(28,20,12,.4);border-radius:2px;padding:.1em .5em;
  text-shadow:0 1px 3px rgba(0,0,0,.5);
}

/* 拖动提示 */
.vol-tip{text-align:center;color:var(--gold-deep);font-size:.74rem;letter-spacing:.32em;margin-top:.35rem;text-indent:.32em;opacity:.85}
.vol-tip::before,.vol-tip::after{content:"——";color:var(--gold);padding:0 .8em}

@media (max-width:1080px){.vol-desc{display:none}}
@media (prefers-reduced-motion:reduce){
  .vol-rail{scroll-snap-type:none}
  .vr{transition:none}
}

/* ---------------- 手记 ---------------- */
.notes-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.note{
  position:relative;padding:2.2rem 1.9rem 1.6rem;border:var(--hairline);
  background:rgba(250,246,236,.04);color:#E7DCC2;
  transition:transform .5s var(--ease),background .5s;
}
.note::before{
  content:"「";position:absolute;top:.2rem;left:1.1rem;
  font-family:var(--serif);font-size:3.4rem;line-height:1;color:rgba(194,162,91,.5);
}
.note p{font-family:var(--serif);font-weight:500;font-size:clamp(1rem,1.6vw,1.16rem);line-height:2.1;letter-spacing:.05em}
.note footer{color:#B99A5E;font-size:.78rem;letter-spacing:.26em;margin-top:1.2rem;font-style:normal}
.note:hover{transform:translateY(-6px);background:rgba(250,246,236,.07)}

/* 手记 · 纪实配图 */
.kids-fig{
  margin:2.6rem auto 0;width:min(440px,92%);overflow:visible;background:transparent;
}
.kids-fig img{
  width:100%;height:auto;aspect-ratio:870/616;object-fit:cover;display:block;
  border:8px solid var(--paper);
  box-shadow:0 0 0 1px var(--gold-line),0 18px 40px rgba(0,0,0,.35);
}
.kids-fig figcaption{
  text-align:center;color:#CFC4AC;font-size:.8rem;letter-spacing:.3em;margin-top:.9rem;
}
.kids-fig figcaption::before,.kids-fig figcaption::after{content:"——";color:#B99A5E;padding:0 .6em}

/* ---------------- 后记 ---------------- */
.colophon{background:linear-gradient(180deg,var(--paper-2),var(--paper));padding:5.5rem 0 2rem}
.colophon-inner{display:flex;align-items:center;justify-content:center;gap:clamp(2rem,6vw,4.5rem);flex-wrap:wrap}
.seal-lg{
  display:grid;place-items:center;text-align:center;
  font-family:var(--serif);font-weight:700;font-size:1.5rem;line-height:1.8;letter-spacing:.3em;text-indent:.3em;
  color:#F6E8C8;width:6.6rem;height:6.6rem;flex:none;
  background:linear-gradient(160deg,#C2232F,var(--red-deep));
  border-radius:.65rem;box-shadow:0 0 0 1px rgba(246,232,200,.7) inset,0 0 0 5px var(--paper-2),0 0 0 6px var(--red-deep);
  transform:rotate(-2.5deg);
}
.col-text{
  font-family:var(--serif);font-weight:600;font-size:clamp(1.15rem,2.4vw,1.7rem);line-height:2.3;
  letter-spacing:.1em;text-align:center;color:var(--ink);
}
.col-foot{margin-top:3.4rem;padding:1.8rem 0 2rem;text-align:center;color:var(--ink-mute);font-size:.88rem;letter-spacing:.16em;border-top:var(--hairline)}
.foot-emblem{
  width:3.4rem;height:3.4rem;object-fit:cover;border-radius:50%;
  box-shadow:0 0 0 1px rgba(163,129,63,.55) inset,0 0 0 4px var(--paper),0 0 0 5px var(--gold-line);
  margin-bottom:1rem;vertical-align:middle;
}
.col-sub{margin-top:.5em;font-size:.75rem;color:var(--gold-deep);letter-spacing:.2em}

/* ---------------- 滚动显现 ---------------- */
[data-reveal]{opacity:0;transform:translateY(30px);transition:opacity .95s var(--ease),transform .95s var(--ease)}
[data-reveal].in{opacity:1;transform:none}
.chapter-head[data-reveal],.prelude [data-reveal],.feature[data-reveal],.stats [data-reveal],.colophon [data-reveal]{transition-delay:.08s}

/* ---------------- 灯箱 ---------------- */
.lightbox{
  position:fixed;inset:0;z-index:80;display:grid;place-items:center;
  background:rgba(24,17,10,.94);
  opacity:0;visibility:hidden;transition:opacity .4s,visibility .4s;
}
.lightbox.open{opacity:1;visibility:visible}
.lb-stage{max-width:min(1180px,92vw);margin:0 auto;text-align:center}
.lb-stage img{
  max-height:82svh;max-width:100%;width:auto;margin-inline:auto;object-fit:contain;
  box-shadow:0 24px 70px rgba(0,0,0,.5);
  transition:transform .3s;
}
.lb-stage figcaption{color:#E9DCBA;letter-spacing:.2em;font-size:.92rem;padding:.9em 0 0;font-family:var(--serif)}
.lb-close,.lb-prev,.lb-next{
  position:fixed;border:1px solid rgba(233,220,186,.5);color:#E9DCBA;background:transparent;
  border-radius:50%;transition:.3s;line-height:1;display:grid;place-items:center;
}
.lb-close:hover,.lb-prev:hover,.lb-next:hover{background:var(--red);border-color:var(--red);color:#fff}
.lb-close{top:1.2rem;right:1.4rem;width:3rem;height:3rem;font-size:1.6rem}
.lb-prev,.lb-next{top:50%;transform:translateY(-50%);width:3.4rem;height:3.4rem;font-size:2.2rem;font-family:var(--serif)}
.lb-prev{left:1.2rem;transform:translateY(-50%) translateX(-2px)}
.lb-next{right:1.2rem;transform:translateY(-50%) translateX(2px)}
body.lb-open{overflow:hidden}

/* ---------------- 响应式 ---------------- */
@media (max-width:1080px){
  .stats-grid{grid-template-columns:repeat(2,1fr);row-gap:2.4rem}
  .notes-grid{grid-template-columns:1fr}
  .feature{grid-template-columns:1fr;gap:2rem}
  .feature-flip .f-text{order:0;text-align:left}
  .land-scroll{grid-auto-rows:clamp(140px,20vh,220px)}
}
@media (max-width:880px){
  .chnav{display:none}
  .vol-rail{height:clamp(230px,44vw,330px)}
  .hero-side{display:none}
  .prelude-grid{grid-template-columns:1fr;gap:2rem}
  .prelude-side{border-right:0;border-bottom:var(--hairline);flex-direction:row;padding:0 0 1.6rem}
  .chapter{padding:4.5rem 0 5rem}
  .chapter-head{grid-template-areas:"no title" "intro intro";column-gap:1.6rem}
  .land-quad{grid-template-columns:1fr;grid-auto-rows:clamp(170px,40vw,260px)}
  .mini-wall{grid-auto-rows:clamp(150px,34vw,230px)}
  .mw,.mw-1,.mw-6{grid-column:span 6}
  .smile-grid{grid-auto-rows:clamp(110px,30vw,170px);gap:.5rem}
  .s-w,.s-xl{grid-column:span 6}
  .s-m{grid-column:span 3}
  .s-xl{grid-row:span 1}
  .brand-text i{display:none}
  .colophon{padding-top:4rem}
}
@media (max-width:560px){
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .brand-text b{font-size:.8rem;letter-spacing:.06em}
  .hero-scroll{display:none}
  .masthead-inner{padding-block:.55rem}
  .brand-seal{width:2.2rem;height:2.2rem;font-size:1rem}
}

/* 键盘焦点 */
a:focus-visible,button:focus-visible,figure:focus-visible,[tabindex]:focus-visible{
  outline:2px solid var(--red);outline-offset:3px;border-radius:3px;
}
@media (prefers-reduced-motion:no-preference){
  .hero-bg img{transform-origin:center}
}