/* ===== v8：开场屏 / 背景音乐按钮 / 光瀑沉浸式作品集 / 时间轴 ===== */

/* ---- 开场屏（每次会话一次；不在 buy.html 出现） ---- */
.splash{display:none}
.has-splash,.has-splash body{overflow:hidden}
.has-splash .splash{display:flex;position:fixed;inset:0;z-index:300;align-items:center;justify-content:center;background:#030406;color:var(--ink);cursor:pointer;overflow:hidden}
.splash__rain{position:absolute;inset:-10% 0;opacity:0;background:
  repeating-linear-gradient(90deg,rgba(120,160,255,0) 0 3px,rgba(120,160,255,.10) 3px 4px,rgba(120,160,255,0) 4px 11px),
  repeating-linear-gradient(180deg,rgba(170,200,255,0) 0 60px,rgba(170,200,255,.16) 60px 120px,rgba(170,200,255,0) 120px 190px);
  -webkit-mask-image:radial-gradient(ellipse 34% 60% at 50% 46%,#000 30%,transparent 72%);mask-image:radial-gradient(ellipse 34% 60% at 50% 46%,#000 30%,transparent 72%);
  animation:splashFall 2.4s linear infinite;transition:opacity 1.6s}
@keyframes splashFall{from{background-position:0 0,0 0}to{background-position:0 0,0 190px}}
.splash__line{position:absolute;left:50%;top:8%;bottom:8%;width:1px;margin-left:-.5px;background:linear-gradient(180deg,transparent,rgba(170,200,255,.95) 30%,rgba(190,215,255,1) 50%,rgba(170,200,255,.95) 70%,transparent);
  box-shadow:0 0 12px rgba(120,160,255,.8),0 0 40px rgba(90,130,255,.45);transform:scaleY(0);transition:transform 2.6s cubic-bezier(.7,0,.2,1) .3s}
.splash.is-ready .splash__line{transform:scaleY(1)}
.splash__body{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center;text-align:center;padding:40px 46px;background:radial-gradient(ellipse at center,rgba(3,4,6,.92) 40%,rgba(3,4,6,0) 72%);opacity:0;transform:translateY(10px);transition:opacity 2s 1.6s,transform 2s 1.6s var(--ease)}
.splash.is-ready .splash__body{opacity:1;transform:none}
.splash__logo{width:74px;height:auto;opacity:.92}
.splash__brand{margin-top:22px;font-family:var(--geo);font-weight:600;font-size:clamp(18px,2.2vw,26px);letter-spacing:.42em;padding-left:.42em}
.splash__sub{margin-top:10px;font-family:var(--geo);font-size:10px;letter-spacing:.5em;color:var(--ink-3);text-transform:uppercase;padding-left:.5em}
.splash__enter{margin-top:44px;display:inline-flex;align-items:baseline;gap:12px;padding:14px 38px 14px 44px;border:1px solid rgba(190,210,255,.42);border-radius:30px;background:rgba(20,30,60,.25);color:var(--ink);
  font-family:var(--serif-sc);font-size:15px;letter-spacing:.5em;cursor:pointer;transition:border-color .5s,background .5s,box-shadow .5s}
.splash__enter em{font-family:var(--serif);font-style:italic;font-size:14px;letter-spacing:.12em;color:#a9bbe6}
.splash__enter:hover,.splash__enter:focus-visible{border-color:rgba(200,220,255,.9);background:rgba(60,90,170,.22);box-shadow:0 0 34px rgba(110,150,255,.35);outline:none}
.splash__tip{margin-top:18px;font-size:11px;letter-spacing:.32em;color:var(--ink-3)}
.splash.is-leaving{pointer-events:none}






/* ---- 背景音乐按钮（细线声波） ---- */
.music{position:fixed;left:18px;bottom:18px;z-index:120;width:44px;height:44px;border-radius:50%;border:1px solid rgba(233,230,224,.22);background:rgba(8,8,7,.45);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;cursor:pointer;color:rgba(233,230,224,.8);transition:border-color .4s,color .4s,opacity .4s}
.music:hover{border-color:rgba(233,230,224,.55);color:#fff}
.music svg{width:24px;height:18px;overflow:visible}
.music path{fill:none;stroke:currentColor;stroke-width:1.1;stroke-linecap:round}
.music__w{opacity:0;stroke-dasharray:6 3;animation:musicWave 1.6s linear infinite;transition:opacity .4s}
.music__off{opacity:1;transition:opacity .4s}
.music.is-on .music__w{opacity:1}.music.is-on .music__off{opacity:0}
.music.is-on{color:#c9d6f5;border-color:rgba(160,185,240,.45)}
@keyframes musicWave{to{stroke-dashoffset:-18}}
.has-splash .music{opacity:0;pointer-events:none}
.footer__music{margin-top:10px;font-size:10.5px;letter-spacing:.06em;color:var(--ink-3);line-height:1.7;padding:0 var(--pad)}
.footer__music a{color:var(--ink-2);border-bottom:1px solid var(--line)}

/* ---- 光瀑作品集 ---- */
.has-falls #photography .section--grid{display:none}
.has-falls.falls-grid #photography .section--grid{display:block}
.section--grid{padding-top:0}
.falls{position:relative;margin-top:clamp(24px,4vw,56px)}
.falls__hold{position:relative;height:100vh;height:100svh;min-height:520px}
.falls__stage{position:absolute;inset:0;background:#030406;overflow:hidden;touch-action:pan-y;-webkit-tap-highlight-color:transparent;cursor:pointer}
.falls__stage.is-fixed{position:fixed;left:0;right:0;top:0;height:100vh;height:100dvh;min-height:0;z-index:80;touch-action:none}
.falls-lock,.falls-lock body{overflow:hidden}
.falls-lock .nav,.falls-lock .music{z-index:120}
.falls-lock .nav{opacity:0;pointer-events:none}
.falls__canvas{position:absolute;inset:0;width:100%;height:100%;display:block}
.falls__hint{position:absolute;left:0;right:0;bottom:clamp(26px,6vh,64px);text-align:center;pointer-events:none;opacity:0;transform:translateY(8px);transition:opacity 1.2s,transform 1.2s var(--ease)}
.falls__hint.is-show{opacity:1;transform:none}
.falls__hint-t{display:block;font-family:var(--serif-sc);font-size:15px;letter-spacing:.6em;padding-left:.6em;color:#dfe6f7;text-shadow:0 0 18px rgba(110,150,255,.6)}
.falls__hint-s{display:block;margin-top:8px;font-family:var(--geo);font-size:9.5px;letter-spacing:.38em;text-transform:uppercase;color:rgba(190,205,235,.55)}
.falls__hint-t::before{content:"";display:block;width:1px;height:28px;margin:0 auto 14px;background:linear-gradient(180deg,transparent,rgba(180,205,255,.9));animation:fallsHint 2.2s ease-in-out infinite}
@keyframes fallsHint{0%,100%{transform:scaleY(.4);transform-origin:top;opacity:.4}50%{transform:scaleY(1);opacity:1}}
.falls__ui{position:absolute;inset:0;pointer-events:none;opacity:0;transition:opacity .8s}
.is-immersive .falls__ui{opacity:1}
.falls__brand{position:absolute;left:clamp(18px,3vw,40px);top:22px;font-family:var(--geo);font-size:11px;font-weight:600;letter-spacing:.38em;color:rgba(233,230,224,.82)}
.falls__brand em{font-family:var(--serif);font-weight:400;font-style:italic;letter-spacing:.12em;color:var(--ink-3);margin-left:8px}
.falls__close,.falls__next{position:absolute;pointer-events:auto;font-family:var(--geo);font-size:10.5px;letter-spacing:.3em;color:rgba(233,230,224,.86);border:1px solid rgba(233,230,224,.28);border-radius:20px;padding:9px 16px 9px 19px;background:rgba(5,6,9,.45);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);cursor:pointer;transition:border-color .4s,background .4s}
.falls__close{right:clamp(18px,3vw,40px);top:16px}
.falls__close i,.falls__next i{font-style:normal;margin-left:6px}
.falls__close:hover,.falls__next:hover{border-color:rgba(233,230,224,.7);background:rgba(30,40,70,.5)}
.falls__next{right:clamp(18px,3vw,40px);bottom:22px;opacity:0;pointer-events:none;transition:opacity .6s}
.falls[data-state="cards"] .falls__next{opacity:1;pointer-events:auto}
.falls__stagehint{position:absolute;left:0;right:0;bottom:30px;text-align:center;font-size:11.5px;letter-spacing:.32em;color:rgba(215,225,245,.78);text-shadow:0 1px 8px #000;opacity:0;transition:opacity .8s}
.falls__stagehint.is-show{opacity:1}
.falls[data-state="timeline"] .falls__stagehint{opacity:0}
.falls__more{text-align:center;padding:22px 0 0}
.falls__gridbtn{font-family:var(--geo);font-size:10.5px;letter-spacing:.3em;color:var(--ink-3);border-bottom:1px solid var(--line);padding:6px 2px;cursor:pointer}
.falls__gridbtn:hover{color:var(--ink)}
.falls-grid .section--grid{padding-top:clamp(32px,5vw,60px)}

/* ---- 时间轴故事 ---- */
.falls__tl{position:absolute;inset:0;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;overscroll-behavior:contain;background:#050608;opacity:0;transition:opacity 1s;cursor:default;touch-action:pan-y}
.falls__tl[hidden]{display:none}
.is-tl .falls__tl{opacity:1}
.tl__axis{position:absolute;left:50%;top:0;width:1px;margin-left:-.5px;height:var(--tlh,100%);min-height:100%;background:linear-gradient(180deg,rgba(150,175,230,0),rgba(150,175,230,.38) 12%,rgba(150,175,230,.38) 88%,rgba(150,175,230,0));transform:scaleY(0);transform-origin:top;transition:transform 1.8s cubic-bezier(.6,0,.2,1)}
.is-tl .tl__axis{transform:scaleY(1)}
.tl__head{position:relative;z-index:1;text-align:center;padding:clamp(90px,16vh,150px) 20px clamp(40px,8vh,80px);background:radial-gradient(ellipse 30% 60% at 50% 60%,#050608 40%,transparent)}
.tl__eyebrow{font-family:var(--geo);font-size:10px;letter-spacing:.5em;color:#8796b8;text-transform:uppercase}
.tl__h{font-family:var(--serif-sc);font-weight:300;font-size:clamp(30px,3.6vw,46px);letter-spacing:.3em;margin-top:14px;padding-left:.3em}
.tl__sub{font-size:12px;letter-spacing:.24em;color:var(--ink-3);margin-top:12px}
.tl__list{position:relative;padding:0 var(--pad) 40px;max-width:1240px;margin:0 auto}
.tl__item{position:relative;display:grid;grid-template-columns:1fr minmax(0,clamp(230px,24vw,330px)) 1fr;column-gap:clamp(28px,4.4vw,70px);align-items:center;margin:0 auto clamp(70px,11vh,120px)}
.tl__item.is-h{grid-template-columns:1fr minmax(0,clamp(300px,34vw,470px)) 1fr}
.tl__dot{position:absolute;left:50%;top:-22px;width:5px;height:5px;margin-left:-2.5px;border-radius:50%;background:#a9bbe6;box-shadow:0 0 10px rgba(130,160,240,.9);opacity:0;transition:opacity .8s}
.tl__img{grid-column:2;grid-row:1;display:block;width:100%;padding:0;border:0;background:#0b0d12;cursor:zoom-in;overflow:hidden;
  clip-path:inset(0 49.6% 0 49.6%);transition:clip-path 1.4s cubic-bezier(.7,0,.2,1)}
.tl__img img{display:block;width:100%;height:auto;transform:scale(1.12);opacity:.6;transition:transform 1.8s var(--ease),opacity 1.4s,filter .6s;filter:saturate(.9)}
.tl__img:hover img{filter:saturate(1.05) brightness(1.06)}
.tl__txt{grid-row:1;grid-column:1;text-align:right;opacity:0;transform:translateY(26px);transition:opacity 1.1s .55s,transform 1.3s .55s var(--ease)}
.tl__item.is-r .tl__txt{grid-column:3;text-align:left}
.tl__label{font-family:var(--geo);font-size:9.5px;letter-spacing:.36em;color:#8796b8;text-transform:uppercase}
.tl__series{font-size:11px;letter-spacing:.3em;color:var(--ink-3);margin-top:6px}
.tl__title{font-family:var(--serif-sc);font-weight:400;font-size:clamp(18px,1.6vw,22px);letter-spacing:.22em;margin-top:14px;cursor:pointer}
.tl__line{font-family:var(--serif-sc);font-size:14px;line-height:2.1;color:var(--ink-2);margin-top:12px;max-width:340px;display:inline-block}
.tl__more{display:block;margin-top:16px;font-family:var(--geo);font-size:10px;letter-spacing:.3em;color:#a9bbe6;cursor:pointer;padding:4px 0}
.tl__item:not(.is-r) .tl__more{margin-left:auto}
.tl__more:hover{color:#fff}
.tl__item.is-in .tl__img{clip-path:inset(0 0 0 0)}
.tl__item.is-in .tl__img img{transform:none;opacity:1}
.tl__item.is-in .tl__txt{opacity:1;transform:none}
.tl__item.is-in .tl__dot{opacity:1}
.tl__foot{position:relative;z-index:1;display:flex;gap:14px;justify-content:center;flex-wrap:wrap;padding:20px 20px 90px;background:#050608}
@media (max-width:760px){
  .tl__item,.tl__item.is-h{grid-template-columns:1fr;row-gap:22px;margin-bottom:76px}
  .tl__img{grid-column:1;grid-row:1;width:min(76vw,360px);margin:0 auto}
  .tl__item.is-h .tl__img{width:min(88vw,460px)}
  .tl__txt,.tl__item.is-r .tl__txt{grid-column:1;grid-row:2;text-align:center;background:#050608;padding:6px 0 4px;position:relative}
  .tl__item:not(.is-r) .tl__more{margin:16px auto 0}
  .tl__item.is-r .tl__more{margin:16px auto 0}
  .tl__line{max-width:none}
  .falls__brand{top:24px;font-size:10px;letter-spacing:.3em}
  .falls__brand em{display:none}
  .falls__next{bottom:66px;right:50%;transform:translateX(50%)}
  .falls__stagehint{bottom:24px;font-size:10.5px;letter-spacing:.18em;padding:0 16px}
}
/* 自定义光标：时间轴照片上显示放大镜 */
.cursor.is-zoom span{background:rgba(233,230,224,.1);border:1px solid rgba(233,230,224,.85);-webkit-backdrop-filter:blur(1px);backdrop-filter:blur(1px)}
.cursor.is-zoom span::after{content:"";width:22px;height:22px;background:no-repeat center/contain url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23f2f0ea' stroke-width='1.2' stroke-linecap='round'%3E%3Ccircle cx='10.5' cy='10.5' r='6.5'/%3E%3Cpath d='M15.5 15.5L21 21M10.5 7.5v6M7.5 10.5h6'/%3E%3C/svg%3E")}
.has-cursor .tl__img{cursor:none}
.has-cursor .falls__tl{cursor:auto}
.has-falls #photography > .section:first-child{padding-bottom:clamp(10px,2vw,24px)}
/* 时间轴阶段仍保留「返回主页」按钮（叠在时间轴之上） */
.falls__tl{z-index:2}
.falls__ui{z-index:3}
.is-tl .falls__brand{opacity:0;transition:opacity .6s}
.is-tl .falls__close{background:rgba(5,6,9,.72)}

/* 开场：点击进入后幕布缓缓左右拉开 */
.has-splash .splash{background:transparent}
.splash{--g:0}
.splash__curtain{position:absolute;top:0;bottom:0;width:50.5%;background:#030406;z-index:0;will-change:transform}
.has-splash .splash{touch-action:none}
.splash.is-ready .splash__line{width:calc(1px + var(--g) * 5px);margin-left:calc(-.5px - var(--g) * 2.5px);filter:brightness(calc(1 + var(--g) * .9));
  box-shadow:0 0 calc(12px + var(--g) * 22px) rgba(140,175,255,calc(.8 + var(--g) * .2)),0 0 calc(40px + var(--g) * 70px) rgba(100,140,255,calc(.45 + var(--g) * .35))}
.splash__line::before{content:"";position:absolute;left:50%;top:-6%;bottom:-6%;width:calc(60px + var(--g) * 260px);transform:translateX(-50%);pointer-events:none;
  background:radial-gradient(ellipse 50% 50% at 50% 50%,rgba(150,185,255,.55),rgba(110,150,255,.18) 45%,rgba(90,130,255,0) 75%);opacity:var(--g);filter:blur(6px)}
.splash.is-leaving .splash__line::before{opacity:0;transition:opacity 1s}
.splash.is-leaving .splash__curtain{transition:transform 3.4s cubic-bezier(.65,0,.25,1) 1.1s}
.splash__curtain--l{left:0;box-shadow:inset -1px 0 0 rgba(150,180,255,.06)}
.splash__curtain--r{right:0;box-shadow:inset 1px 0 0 rgba(150,180,255,.06)}
.splash__rain{z-index:0}
.splash__line{z-index:1}
.splash__body{z-index:2}
.splash.is-leaving .splash__body{opacity:0;transform:translateY(-10px) scale(.98);transition:opacity 1.1s,transform 1.4s var(--ease)}
.splash.is-leaving .splash__rain{opacity:0;transition:opacity 1s}
.splash.is-leaving .splash__curtain--l{transform:translateX(-101%)}
.splash.is-leaving .splash__curtain--r{transform:translateX(101%)}
.splash.is-leaving .splash__line{opacity:0;transition:opacity 1.6s 1.3s;box-shadow:0 0 18px rgba(140,175,255,.95),0 0 70px rgba(100,140,255,.6)}
@media (prefers-reduced-motion: reduce){.splash.is-leaving .splash__curtain{transition-duration:1.2s;transition-delay:.2s}}