:root{color-scheme:dark;--ink:#edf0ee;--muted:#a7b0b2;--bg:#090d10;--hw-red:#cf0a2c;--hw-red-bright:#ff3b52}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",sans-serif}button,input,a{-webkit-tap-highlight-color:transparent}button,a,label{touch-action:manipulation}button,input{font:inherit}button,a{color:inherit}a{text-decoration:none}button{cursor:pointer}button:disabled{cursor:wait}button:focus-visible,a:focus-visible,input:focus-visible,label:focus-within{outline:2px solid #92d7ed;outline-offset:5px}[hidden]{display:none!important}.header{height:90px;position:relative;z-index:10;display:flex;align-items:center;justify-content:space-between;padding:0 4.4%;background:#090d10;border-bottom:1px solid #ffffff16}.wordmark{font:28px "Noto Serif SC","Songti SC",SimSun,serif;letter-spacing:.08em;display:flex;align-items:center;gap:17px}.wordmark span{font:9px sans-serif;letter-spacing:.25em;color:#a5acb0}nav{display:flex;gap:40px;height:100%;align-items:center}nav a{font-size:14px;letter-spacing:.1em;position:relative;padding:15px 0;color:#aeb4b5}nav a.active{color:#fff}nav a.active:after{content:"";position:absolute;bottom:3px;height:1px;background:#fff;left:0;right:0}.nav-note{font-size:11px;color:#939b9f;letter-spacing:.08em}.page{min-height:calc(100svh - 90px);position:relative}.home{display:grid;grid-template-columns:1fr 1.15fr;gap:6%;padding:5vh 6.7% 3vh;align-items:center}.eyebrow{font-size:11px;letter-spacing:.17em;color:#b9c0c1}.home h1,.hero h1{font-family:"Noto Serif SC","Songti SC",SimSun,serif;font-weight:400;line-height:1.24;letter-spacing:.02em;font-size:clamp(43px,5.4vw,83px);margin:30px 0}.lead,.hero p{font-size:15px;line-height:2;color:#c3c9c9;letter-spacing:.06em}.upload-actions{display:flex;gap:12px;margin:32px 0 0}.button{display:inline-flex;justify-content:center;align-items:center;border:1px solid #536064;padding:13px 25px;font-size:13px;letter-spacing:.1em;border-radius:2px;cursor:pointer}.primary{background:#e5eeee;color:#16242b;border-color:#e5eeee}.primary:hover{background:#fff}.secondary{background:transparent}.secondary:hover{background:#ffffff0b}.upload-note,.privacy{font-size:11px;line-height:1.7;color:#829094}.status{font-size:12px;line-height:1.7;min-height:42px;color:#9abbc7;max-width:370px}.home-bottom{margin-top:6vh;display:flex;gap:24px;align-items:center;color:#78848a;font-size:11px}.text-link{display:inline-block;background:none;border:0;border-bottom:1px solid #829398;padding:6px 0;font-size:12px;letter-spacing:.06em;color:#c4d8df}.text-link:hover{color:#fff}.photo-workspace{width:100%;max-width:640px;justify-self:end}.preview-frame{position:relative;aspect-ratio:1/1;max-height:65svh;background:#131e23;overflow:hidden}.sample,.result{height:100%;width:100%;position:relative}.sample img{width:100%;height:100%;object-fit:cover}.sample-tag{position:absolute;bottom:16px;left:16px;background:#071016d9;padding:7px 10px;color:#c6cdcc;font-size:10px}.result img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;background:#f7f5f1}.result .after{clip-path:inset(0 0 0 var(--pos,50%))}.split-line{position:absolute;top:0;bottom:0;left:var(--pos,50%);width:1px;background:#f8f7f3}.split-line span{position:absolute;left:-18px;top:50%;font-size:10px;color:#222;background:#f7f5f1;padding:10px 7px;border-radius:30px}.busy{position:absolute;inset:0;background:#081118dd;display:flex;align-items:center;justify-content:center;gap:15px;font-size:13px;letter-spacing:.1em}.loader{width:19px;height:19px;border:1px solid #a6c0c2;border-top-color:transparent;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.preview-tools{display:flex;align-items:center;gap:15px;margin:16px 0;font-size:10px;color:#97a7ac}input[type=range]{flex:1;accent-color:#a5c9d4;height:14px;cursor:ew-resize}.result-actions{display:flex;justify-content:space-between;align-items:center;font-size:11px;color:#a0afb2;min-height:30px}.privacy{margin-top:8px;max-width:510px}.hero{height:calc(100svh - 90px);min-height:630px;overflow:hidden;background:#0a1111}.hero-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;transition:filter .6s,transform .7s}.hero-content{position:relative;z-index:1;padding:7vh 0 0 8%;max-width:54%;text-shadow:0 1px 20px #0004}.hero h1{margin:7vh 0 24px;font-size:clamp(54px,6vw,90px)}.hero p{font-size:14px;margin-bottom:32px;color:#e1e1dc}.light{color:#eee;border-color:#d2d9d0}.side-caption{position:absolute;right:4.5%;top:9%;font:10px/1.7 Georgia,serif;letter-spacing:.08em;color:#e0e5de}.hero-footer{position:absolute;bottom:24px;left:8%;right:4.5%;display:flex;align-items:center;justify-content:space-between;font-size:10px;color:#c9d0c9;z-index:1}.feature-row{display:flex;gap:28px;margin:34px 0;font-size:12px}.feature-row span{padding-right:22px;border-right:1px solid #ffffff35}.feature-row span:last-child{border:0}.feature-row small{display:block;margin-top:9px;font-size:11px;color:#b7c1b8}.outlined{background:#10171444;border-color:#e1e5de;border-radius:25px}.welcome .hero-image{filter:saturate(.92) brightness(.66)}.welcome:before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:radial-gradient(42% 56% at 76% 46%,#cf0a2c47,transparent 66%),linear-gradient(90deg,#04070bd9,#04070b00 60%)}.welcome .hero-content,.welcome .hero-footer,.welcome .side-caption{z-index:2}.hw-watermark{position:absolute;z-index:1;right:-2%;top:48%;transform:translateY(-50%);width:min(34vw,470px);color:var(--hw-red);opacity:.17;pointer-events:none}.hw-lockup{display:inline-flex;align-items:center;gap:11px;margin-bottom:30px}.hw-mark{width:30px;height:30px;color:var(--hw-red-bright);flex:none}.hw-word{font:600 12px/1 "Helvetica Neue",Helvetica,Arial,sans-serif;letter-spacing:.38em;color:#f2f4f2}.brand[data-tone=green] .hero-image{filter:hue-rotate(-40deg)}.brand[data-tone=violet] .hero-image{filter:hue-rotate(45deg)}.product[data-view=detail] .hero-image{transform:scale(1.32);transform-origin:70% 60%}dialog{max-width:500px;width:calc(100% - 36px);background:#122027;color:#edf1ec;border:1px solid #53636a;padding:40px;border-radius:4px}dialog::backdrop{background:#000b;backdrop-filter:blur(7px)}dialog h2{font-family:SimSun,serif;font-size:30px;font-weight:400;margin-top:26px}dialog p{font-size:13px;line-height:1.9;color:#becbcf}.close{float:right;border:0;background:none;color:#b8c2c8;font-size:11px}.choices{display:flex;gap:12px;margin:25px 0}.choices button{background:#1b323c;border:1px solid #62727a;padding:12px;font-size:12px}form{display:grid;gap:14px}form label{font-size:12px}form input{background:#09171e;color:white;border:1px solid #586a72;padding:13px;width:100%}dialog small{display:block;line-height:1.8;font-size:10px;color:#82979f;margin-top:18px}@media(max-width:900px){.nav-note{display:none}.wordmark span{display:none}nav{gap:24px}.home{gap:4%;padding:5vh 5%}.home h1{font-size:47px}.hero-content{max-width:66%}.hero h1{font-size:65px}.side-caption{display:none}}@media(max-width:600px){.header{height:76px;padding:0 18px}.wordmark{font-size:22px}nav{gap:17px}nav a{font-size:12px;letter-spacing:0}.page{min-height:calc(100svh - 76px)}.home{display:flex;flex-direction:column;padding:28px 24px;gap:25px;align-items:stretch}.home h1{font-size:43px;margin:20px 0 15px}.home .lead{font-size:12px;margin-bottom:15px}.upload-actions{margin-top:20px}.home-bottom{display:none}.status{min-height:0;margin:10px 0}.upload-note{margin-bottom:0}.photo-workspace{max-width:440px;align-self:center}.preview-frame{max-height:none}.hero{height:calc(100svh - 76px);min-height:620px}.hero-content{padding:40px 24px;max-width:92%}.hero h1{font-size:54px;margin:55px 0 24px}.hero-image{object-position:62% center;filter:brightness(.7)}.hero p{font-size:12px}.hero-footer{left:24px;right:24px;bottom:25px;gap:15px}.hero-footer span{max-width:180px;font-size:9px}.feature-row{gap:14px}.feature-row span{padding-right:12px;font-size:11px}.feature-row small{font-size:10px}.eyebrow{font-size:9px}.welcome .hero-image{object-position:62% center}.result-actions{font-size:10px}.button{padding:12px 22px}.hw-lockup{margin-bottom:16px}.hw-mark{width:24px;height:24px}.hw-word{font-size:10px;letter-spacing:.32em}.hw-watermark{width:66vw;right:-18%;opacity:.15}dialog{padding:28px}}@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.hero h1{font-size:clamp(54px,7vw,102px);margin-top:9vh}@media(max-width:600px){.hero h1{font-size:54px;margin-top:55px}}
/* 最后一页（#welcome）背景视频：夜间素材本身偏暗，单独放宽亮度滤镜，避免整段发灰 */
.welcome .hero-video{filter:saturate(.95) brightness(.8)}
@media(max-width:600px){.welcome .hero-video{object-position:38% center}}