/* ==========================================================================
   澜宸官网样式表
   组织顺序：变量与基础 → 页头 → 首屏 → 章节 → 联系 → 底栏 → 启动层 → 动效 → 断点。
   一个选择器只在一处定义，同一属性的最终值直接写在这里，不再靠后面的块覆盖前面的块。
   断点统一排在最后，按“桌面 → 窄屏 → 超窄 → 减动效”排列，后出现的块覆盖先出现的块。
   ========================================================================== */

/* ---------- 1. 字体 ---------- */
/* 子集只包含页面上会出现的字符，由“维护工具/重建字体.py”生成；版本号由打包脚本写入。 */
@font-face{font-family:"Launcher Site Sans";src:url("fonts/launcher-site-sans.woff2?v=6203f20961de") format("woff2");font-weight:100 900;font-style:normal;font-display:swap}
/* 隐私声明正文用字不在这份子集里，单独一份按需下载：首页访客不会碰到它，
   从首页点进隐私页时主字体已在缓存，只补这一份。 */
@font-face{font-family:"Launcher Site Sans";src:url("fonts/launcher-site-sans-privacy.woff2?v=d6a82e74903d") format("woff2");font-weight:100 900;font-style:normal;font-display:swap;unicode-range:U+4E03,U+4E09,U+4E0D,U+4E49,U+4E8C,U+4E8E,U+4E91,U+4E94,U+4EC5,U+4ED6,U+4ED8,U+4F7F,U+5168,U+516B,U+516D,U+5176,U+518C,U+51B5,U+51C6,U+51CF,U+5206,U+5219,U+5220,U+5229,U+529F,U+5305,U+534F,U+539F,U+53CA,U+53D8,U+53F0,U+5404,U+544A,U+54A8,U+552E,U+5546,U+56DB,U+56F4,U+5927,U+5B58,U+5B89,U+5BA2,U+5C06,U+5C11,U+5C3D,U+5C65,U+5E03,U+5E73-5E74,U+5E76,U+5E7F,U+5E94,U+5F53,U+5F8B,U+5FC5,U+6001,U+60C5,U+6237,U+6258,U+62EC,U+636E,U+6392,U+63AA,U+6536,U+6599,U+65B9,U+65BD,U+65E5,U+663E,U+6708,U+672C,U+67E5,U+6839,U+6848,U+6863,U+6A21,U+6CE8,U+72B6,U+751F,U+7531,U+7591,U+76EE,U+786E,U+793A,U+79F0,U+7B49,U+7B56,U+7B80,U+7F18,U+7F6E,U+817E,U+8282,U+8303,U+89C4,U+89C6,U+8BAE-8BAF,U+8BBF,U+8BDA,U+8BE2,U+8BEF,U+8FB9,U+8FC7,U+8FF0,U+9002,U+901F,U+9075,U+914D,U+91C7,U+91CF,U+94AE,U+94FE,U+9500,U+9519,U+957F,U+95F4,U+9605,U+9632,U+9646,U+9664,U+9669,U+969C,U+96C6,U+98CE}

/* ---------- 2. 变量 ---------- */
:root{
 --ink:#234d7b;--muted:#506b8b;--blue:#3277cb;--sky:#83b8eb;--pink:#df9fbd;--gold:#d7a743;
 --page-limit:1440px;--page-gutter:clamp(20px,5vw,80px);--header-height:68px;
 /* --hero-room 是首屏可用高度，app.js 每次布局重算后覆盖；--header-height 同理。 */
 --hero-room:calc(100svh - var(--header-height));--hero-pad:clamp(20px,3.8vh,46px);
 --ease:cubic-bezier(.22,1,.36,1);
}

/* ---------- 3. 基础重置与通用元素 ---------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-height) + 16px);scrollbar-gutter:stable}
body{margin:0;padding-top:var(--header-height);background:#dfedfc;color:var(--ink);font:400 16px/1.75 "Launcher Site Sans",sans-serif;-webkit-font-smoothing:antialiased;overflow-x:clip}
/* 图片失败时保留预留尺寸并隐藏破图文字，避免装饰资源异常造成布局跳动。 */
img{color:transparent}
img[data-image-error="true"]{visibility:hidden}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer}
a,button{-webkit-tap-highlight-color:transparent}
button:focus-visible,a:focus-visible{outline:2px solid #347bd0;outline-offset:5px}
::selection{background:#bcd8fa;color:#20436c}
[hidden]{display:none!important}
#main:focus,.intro:focus{outline:0}
.skip-link{position:fixed;top:-100px;left:16px;z-index:100;background:#fff5fb;color:#315d8e;padding:10px 18px}
.skip-link:focus{top:12px}
/* 宽屏时内容两侧留白自动加大，内容始终居中在 --page-limit 以内。 */
.header,.hero,.section,.footer{padding-inline:max(var(--page-gutter),calc((100% - var(--page-limit))/2),env(safe-area-inset-left))}

/* ---------- 4. 页头与导航 ---------- */
/* 固定导航不参与文档流；高度由 app.js 实测后写回 --header-height，锚点偏移才不会偏。 */
.header{position:fixed;inset:0 0 auto;z-index:40;display:flex;align-items:center;justify-content:space-between;gap:28px;min-height:68px;height:auto;padding-block:8px;background:#bbd7f2f5;border-bottom:1px solid #99bce052;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);isolation:isolate;box-shadow:0 5px 24px #356ba10c}
/* 公司名字号不在样式表里定死：这里的值只是基准，最终由 brand-lockup.js 按容器宽度计算。 */
.company-link{display:grid;justify-items:start;row-gap:2px;flex:0 1 auto;min-width:0;max-width:100%;line-height:1}
.company-cn,.company-en{display:block;width:max-content;max-width:100%;white-space:nowrap;letter-spacing:0}
.company-link .company-cn{font-size:20px;font-weight:650;line-height:1.15;color:#204a78}
.company-link .company-en{font-size:11.6px;font-weight:400;color:#486b91;line-height:1.2}
.header nav{display:flex;flex:0 0 auto;align-items:center;justify-content:flex-end;gap:32px}
.header nav a{position:relative;display:flex;align-items:center;min-height:44px;white-space:nowrap;padding:10px 0;font-size:14px;font-weight:500;color:#46698e;transition:color .25s}
.header nav a.active,.header nav a:hover{color:#1c568f}
.header nav a::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:2px;background:#3e80c7;border-radius:2px;transform:scaleX(0);transition:transform .35s var(--ease)}
.header nav a.active::after{transform:scaleX(1)}
.nav-toggle{display:none}  /* 桌面隐藏汉堡按钮，窄屏由断点里的 .js .nav-toggle 打开 */
.reading-progress{position:absolute;bottom:-1px;left:0;right:0;height:2px;transform:scaleX(0);transform-origin:left;background:linear-gradient(90deg,#6aa8e9,#dfa0c0)}
/* 启动层显示期间主体整体隐藏，避免用户看到半加载的页面。 */
.page-shell{opacity:1;transition:opacity .65s var(--ease)}
body.booting{overflow:hidden}
.booting .page-shell{opacity:0}

/* ---------- 5. 首屏文案 ---------- */
.hero{position:relative;isolation:isolate;min-height:var(--hero-room);padding-block:var(--hero-pad);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-items:center;gap:clamp(30px,4vw,68px);overflow:hidden;background:radial-gradient(ellipse at 18% 42%,#abd5f78c,transparent 49%),radial-gradient(ellipse at 95% 83%,#efc9dc7a,transparent 56%),linear-gradient(115deg,#cce5fc,#dceafc 53%,#e4e9f7)}
.hero-grid,.hero-glow,#starfield{position:absolute;inset:0;pointer-events:none;z-index:-1}
.hero-grid{z-index:-3;background-image:linear-gradient(#438bd40b 1px,transparent 1px),linear-gradient(90deg,#438bd40b 1px,transparent 1px);background-size:76px 76px;mask-image:linear-gradient(100deg,#000,transparent)}
.hero-glow{z-index:-2;background:radial-gradient(ellipse at 24% 45%,#9ad6fc45,transparent 65%)}
#starfield{width:100%;height:100%;opacity:.7;mix-blend-mode:multiply}
.hero-copy{grid-column:2;grid-row:1;position:relative;z-index:3;min-width:0}
.eyebrow{display:flex;align-items:center;gap:11px;margin:0 0 22px;font-size:11px;font-weight:550;line-height:1.8;letter-spacing:2.3px;color:#4f7198}
.status-dot{display:inline-block;flex-shrink:0;width:6px;height:6px;background:#daac4e;border-radius:50%;box-shadow:0 0 0 4px #f2c36e19}
.hero h1{font-size:clamp(34px,min(4.3vw,8vh),68px);font-weight:680;line-height:1.32;letter-spacing:-1px;margin:0;color:#1d4676}
.headline-accent{color:#3477ca}
.hero-english{font-size:10px;font-weight:500;line-height:1.9;letter-spacing:1.8px;color:#526d90;margin:22px 0 26px}
.hero-english::before{content:"";display:block;width:46px;height:3px;margin-bottom:16px;border-radius:2px;background:linear-gradient(90deg,#ddb052,#db9fbc)}
.hero-lead{font-size:clamp(18px,1.45vw,23px);font-weight:570;line-height:1.8;letter-spacing:.1px;margin:0 0 14px;color:#2c527c}
.hero-description{font-size:clamp(14px,1.14vw,17px);line-height:1.95;color:#4c6686;margin:0}
.hero-bottom{display:flex;align-items:center;justify-content:flex-end;width:100%;margin-top:26px;min-height:76px;gap:14px}
.hero-location{display:flex;flex-direction:column;align-items:flex-end;gap:5px;margin:0;text-align:right;font-size:14px;line-height:1.8;color:#42678f}
.location-cn{display:inline-flex;align-items:center;gap:9px}
.hero-location .status-dot{background:#639bd4;box-shadow:none;width:5px;height:5px}
.hero-location .location-en{font-size:10px;letter-spacing:1.3px;color:#5c7698;white-space:nowrap}
/* 音乐按钮：小图标 + 40px 触控区，兼顾视觉克制与手机可点。 */
.music-toggle{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;width:40px;height:40px;padding:10px;background:#eaf2fc91;border:1px solid #9db7d45c;border-radius:50%;transition:background .25s,border-color .25s,transform .25s}
.music-toggle:hover{background:#f9f3fa;border-color:#cba6c1;transform:translateY(-1px)}
.music-toggle img{display:block;width:18px;height:18px;pointer-events:none}
.music-toggle .music-icon-on{display:none}
.music-toggle[data-playing=true] .music-icon-on{display:block}
.music-toggle[data-playing=true] .music-icon-off{display:none}
.music-toggle:focus-visible{outline:2px solid #739ac6;outline-offset:4px}

/* ---------- 6. 首屏插画场景 ---------- */
.hero-scene{grid-column:1;grid-row:1;position:relative;width:100%;height:clamp(250px,calc(var(--hero-room) - var(--hero-pad)*2),680px);perspective:1200px;z-index:2}
.scene-aura{position:absolute;inset:0;background:radial-gradient(circle 180px at var(--spot-x,50%) var(--spot-y,45%),#7fc9ff45,transparent 76%);opacity:0;transition:opacity .45s;pointer-events:none}
.pointer-active .scene-aura{opacity:1}
.character-parallax{position:absolute;inset:0;transform:translate3d(var(--px,0px),var(--py,0px),0) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg));transform-origin:center;will-change:transform}
.character-float{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;animation:levitate 7s ease-in-out infinite}
.mascot-hit{display:flex;align-items:center;justify-content:center;background:none;border:0;padding:0;touch-action:manipulation;border-radius:28px}
.hero-mascot{height:87%;max-height:620px;max-width:86%;aspect-ratio:1992/2646;transform:rotate(9deg)}
.mascot-hit img{display:block;width:100%;height:100%;object-fit:contain;pointer-events:none;transition:filter .3s,translate .3s,scale .3s}
.hero-character{filter:drop-shadow(0 22px 26px #3b7bb82e)}
.mascot-hit:hover img{filter:drop-shadow(0 18px 25px #3287d945)}
.mascot-hit:active img{scale:.98}
.mascot-hit.is-greeting img{animation:happy-tap .6s var(--ease)}
.scene-rings{position:absolute;inset:8% 4% 6%;transform:rotate(-18deg);pointer-events:none;overflow:hidden;contain:paint}
.scene-rings i{position:absolute;left:2%;top:15%;width:92%;height:68%;border:1px solid #5e9ed337;border-radius:50%;transform:rotateX(20deg)}
.scene-rings i:nth-child(2){width:100%;height:82%;left:0;top:8%;border-style:dashed;border-color:#649fda2b;animation:orbit-turn 45s linear infinite}
.scene-rings i:nth-child(3){width:66%;height:50%;left:17%;top:25%;transform:rotate(36deg);border-color:#c08fae39}
.scene-floor{position:absolute;left:16%;width:65%;height:14%;bottom:0;background:radial-gradient(ellipse,#5daae337,transparent 70%);filter:blur(10px)}
.speech-bubble{min-height:0;display:flex;flex-direction:column;justify-content:center;position:absolute;z-index:4;min-width:0;width:max-content;max-width:calc(100% - 6px);padding:13px 16px;background:linear-gradient(140deg,#fff9fcf5,#ffeef6f5);border:1px solid #e2b6cd;border-radius:20px;box-shadow:0 9px 25px #789bc620,0 3px 0 #e0b3c820;color:#665474;text-align:left;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.speech-bubble p{font-size:12.5px;font-weight:500;line-height:1.8;margin:0}
.bubble-line{display:block;white-space:nowrap}
.hello-bubble{top:6%;right:0;transform:rotate(3deg)}
.hello-bubble p{font-size:15.5px;font-weight:600;line-height:1.6}
.mascot-note{bottom:1%;left:-2%;transform:rotate(-3deg)}
.scene-coordinate{position:absolute;bottom:8%;right:-1%;font-size:10px;letter-spacing:2px;writing-mode:vertical-rl;color:#5c7fa7}
.floating-star,.gold-spark{position:absolute;z-index:1;line-height:1;pointer-events:none;font-weight:400;animation:gold-glimmer 6s ease-in-out infinite}
.star-one{right:0;top:54%;font-size:27px;color:#d788aa}
.gold-spark{color:#d6a63d}
.spark-two{top:16%;left:7%;font-size:13px;animation-delay:-1.6s}
.spark-three{bottom:22%;left:4%;font-size:22px;animation-delay:-3.4s}
.spark-four{top:29%;right:9%;font-size:10px;animation-delay:-4.7s}

/* ---------- 7. 章节与澜宸足迹 ---------- */
.section{--section-pad:clamp(32px,4.5vh,62px);position:relative;min-height:var(--hero-room);padding-block:var(--section-pad);display:flex;flex-direction:column;justify-content:center;overflow:hidden}
.section-heading{margin:0 0 36px}
.section-heading h2{display:flex;align-items:center;gap:15px;margin:0;font-size:clamp(27px,2.65vw,38px);font-weight:650;letter-spacing:.8px;line-height:1.45;color:#28527f}
.section-heading h2>span{font-size:17px;color:#cd9a3e}
.section-heading>p{margin:8px 0 0;font-size:15px;font-weight:450;line-height:1.8;letter-spacing:1.1px;color:#5d789c}
.journey{isolation:isolate;background:radial-gradient(ellipse at 94% 94%,#efd1e259,transparent 62%),linear-gradient(135deg,#dceafb,#e5edfb);border-top:1px solid #bdcfe651}
/* 桌面用 3 列 × 2 行：6 列并排时每列只有约 190px，正文一行只放得下十几个字，读起来像注脚。
   连线由每个条目自己向右画一段（::after），每行第三项不画，两行各自成轨。 */
.timeline{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:46px;row-gap:48px;list-style:none;padding:0;margin:18px 0 0}
.timeline::before{display:none}  /* 桌面不用整段长轨，改由 ::after 分段连接 */
.timeline-item{position:relative;min-width:0}
.timeline-item::before{content:"";position:absolute;top:41px;left:0;width:9px;height:9px;border:2px solid #e3edfc;border-radius:50%;background:#ce8fae;box-shadow:0 0 0 4px #d8a5c220}
.timeline-item::after{content:"";position:absolute;top:45px;left:15px;right:-38px;height:1px;background:linear-gradient(90deg,#d7ad62,#c79fc0 56%,#8bb5df)}
.timeline-item:nth-child(3n)::after{display:none}
.timeline time{display:block;font-size:14px;font-weight:550;line-height:24px;letter-spacing:1px;color:#416994;font-variant-numeric:tabular-nums;margin-bottom:40px}
.timeline h3{font-size:20px;font-weight:600;line-height:1.5;letter-spacing:.2px;margin:0 0 11px;color:#254f7c}
.timeline p{font-size:14.5px;line-height:2;color:#4b6685;margin:0;text-wrap:pretty;overflow-wrap:anywhere}
.timeline p span{color:#3267a6;white-space:nowrap}
.journey-note{display:flex;justify-content:flex-end;margin-top:50px}
.journey-intro{display:flex;flex-direction:column;align-items:flex-start;gap:5px;width:max-content;max-width:100%;margin:0;line-height:1.8;text-align:left}
.journey-intro span:first-child{font-size:clamp(15px,1.2vw,18px);font-weight:550;letter-spacing:.4px;color:#3e638c}
.journey-intro span:last-child{align-self:flex-end;margin-left:40px;font-size:13px;font-weight:400;letter-spacing:.5px;color:#657f9f}
.journey-spark{position:absolute;left:max(var(--page-gutter),calc((100% - var(--page-limit))/2));bottom:29px;line-height:1;color:#bd7c9e;font-size:19px}

/* ---------- 8. 联系区 ---------- */
.contact{background:radial-gradient(ellipse at 92% 35%,#f1d2e365,transparent 62%),linear-gradient(130deg,#dfedfc,#e9effc)}
.contact-heading-row{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:28px}
.contact-heading-row .section-heading{margin:0}
.paper-plane{display:block;width:106px;height:auto;flex:none;margin-right:16px;animation:paper-drift 9s ease-in-out infinite}
.contact-card{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-template-areas:"copy portrait";min-height:clamp(350px,calc(var(--hero-room) - 188px),535px);background:linear-gradient(112deg,#f8fbff,#f8fbff 57%,#fff0f6);border:1px solid #c1d5ec;border-radius:25px;box-shadow:0 20px 55px #3869a31c;overflow:hidden;flex-shrink:0}
.contact-copy{grid-area:copy;align-self:center;min-width:0;padding:34px 5% 34px 10%}
.contact-copy .eyebrow{font-size:9px;letter-spacing:1.3px;color:#627593;line-height:1.9;margin-bottom:20px}
.contact-copy h3{font-size:clamp(29px,2.8vw,44px);font-weight:620;line-height:1.5;letter-spacing:-.5px;margin:0;color:#244c78}
.blue-text{color:#397fcd}
.contact-description{font-size:clamp(14px,1.05vw,17px);line-height:1.95;color:#58718f;margin:23px 0}
.contact-email{display:flex;gap:23px;align-items:center;font-size:clamp(25px,2.65vw,40px);line-height:1.5;letter-spacing:-.6px;color:#285688;white-space:nowrap;margin:24px 0}
.contact-email>span{font-size:27px;color:#b66f90;transition:transform .3s}
.contact-email:hover>span{transform:translate(3px,-3px)}
.contact-actions{display:flex;align-items:center;flex-wrap:wrap;gap:26px}
.button{display:inline-flex;align-items:center;justify-content:space-between;gap:35px;min-height:48px;padding:13px 23px;font-size:15px;border:1px solid transparent;border-radius:10px;transition:transform .34s cubic-bezier(.2,1.5,.4,1),background .3s,box-shadow .3s}
.button:hover{transform:translateY(-2px)}
/* 按下是一段独立反馈：先落回原位再轻微收缩，松手用带回弹的曲线复位，与小狼的按压语言一致。
   :active 必须写在 :hover 之后（同权重），否则按住时仍会被悬停位移盖掉。 */
.button:active{transform:translateY(0) scale(.968);box-shadow:0 3px 10px #2b6ec52e;transition:transform .09s cubic-bezier(.35,0,.65,1),background .3s,box-shadow .09s}
.button>span{font-size:21px;line-height:1;color:#ffe0a1}
.primary{background:#3477c6;color:#fff;box-shadow:0 7px 20px #2b6ec51a}
.primary:hover{background:#2b6dbb;box-shadow:0 10px 28px #2b6ec529}
.copy-email{display:inline-flex;gap:12px;align-items:center;min-height:44px;padding:12px 0;border:0;background:none;color:#5b779c;font-size:13px;transition:color .25s,transform .34s cubic-bezier(.2,1.5,.4,1)}
.copy-email:hover{color:#2b65af}
.copy-email:active{transform:scale(.94);transition:color .25s,transform .09s cubic-bezier(.35,0,.65,1)}
.contact-portrait{grid-area:portrait;position:relative;min-width:0;display:flex;align-items:center;justify-content:center;isolation:isolate;background:radial-gradient(ellipse at 50% 58%,#e0edfc,#fcecf5 85%);padding:44px 30px}
.portrait-art{mix-blend-mode:multiply;pointer-events:none;position:relative;z-index:2;width:76%;max-width:332px;height:86%;max-height:358px;aspect-ratio:1188/1324;transform-origin:50% 50%;animation:portrait-like 5s cubic-bezier(.45,0,.35,1) infinite}
.portrait-art img{display:block;width:100%;height:100%;object-fit:contain;mix-blend-mode:normal;filter:none}
.portrait-orbit{position:absolute;left:8%;right:8%;top:14%;bottom:13%;border:1px solid #b8d1ee;border-radius:50%;transform:rotate(-25deg);z-index:0}
.portrait-orbit::after{content:"";position:absolute;inset:20px -10px;border:1px dashed #e1b9d2;border-radius:50%;transform:rotate(36deg)}
.portrait-caption{position:absolute;top:26px;left:28px;font-size:8px;letter-spacing:1.8px;color:#637e9d}
.portrait-star{position:absolute;right:14%;top:18%;font-size:24px;color:#d594b4;z-index:3}
.portrait-spark{position:absolute;left:15%;top:31%;font-size:17px;color:#c8a253;z-index:3;animation:gold-glimmer 6s ease-in-out infinite}
.portrait-plus{position:absolute;left:10%;bottom:22%;font-size:23px;color:#8aafd8;z-index:3}

/* ---------- 9. 底栏与提示条 ---------- */
.footer{display:flex;align-items:center;justify-content:space-between;gap:20px;padding-block:6px max(6px,env(safe-area-inset-bottom));background:#bcd7ef;border-top:1px solid #98bcdd55}
.music-credit{display:flex;align-items:center;gap:10px;max-width:470px;min-width:0;font-size:10.5px;line-height:1.45;font-weight:400;color:#516b8c;text-align:left}
.music-attribution{min-width:0}
.music-attribution a{text-decoration:underline;text-decoration-thickness:.6px;text-decoration-color:#8aa6c47a;text-underline-offset:2px}
.music-credit a:hover,.music-credit a:focus-visible{color:#305d8b;text-decoration-color:currentColor}
/* License 与隐私声明做成同一规格的小胶囊，保持底栏节奏一致。 */
.license-pill,.footer-privacy{display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;min-height:26px;padding:3px 10px;border:1px solid #9eb8d078;border-radius:999px;background:linear-gradient(140deg,#e8f2fccc,#f5eaf4b3);font-size:10px;line-height:1.4;color:#536f90}
.license-pill{cursor:default}
.footer-privacy{border-color:#8eafd080;background:#eaf3fccc;color:#426b94;text-decoration:none;white-space:nowrap;transition:background .2s,border-color .2s,color .2s,transform .2s}
.footer-privacy:hover,.footer-privacy:focus-visible{background:#fff2f8;border-color:#caa4c2;color:#315d8d;transform:translateY(-1px)}
.audio-edit{color:#5d7694}
.toast{position:fixed;left:50%;bottom:calc(24px + env(safe-area-inset-bottom));z-index:80;max-width:calc(100vw - 32px);width:max-content;padding:12px 20px;background:#fff4f9;color:#694d71;border:1px solid #deb8d1;border-radius:12px;box-shadow:0 12px 32px #53769c20;font-size:14px;opacity:0;pointer-events:none;transform:translate(-50%,18px);transition:opacity .3s,transform .45s}
.toast.visible{opacity:1;transform:translate(-50%,0)}

/* ---------- 10. 启动层 ---------- */
/* 由 app.js 控制显隐；index.html 头部另有一段同名内联样式，只负责外部样式到达前的第一帧。 */
.intro{position:fixed;inset:0;z-index:90;display:grid;grid-template-rows:minmax(0,1fr);place-items:center;height:100%;height:100dvh;padding:28px 24px 112px;overflow:hidden;opacity:1;transition:opacity .16s ease-out;background:radial-gradient(ellipse at 69% 70%,#efcadd80,transparent 60%),radial-gradient(ellipse at 35% 36%,#c2dff9,#e1edfc 76%)}
.intro-content{position:relative;text-align:center;width:min(560px,calc(100vw - 36px));max-height:100%;padding:12px 18px 0}
.intro-art-wrap{width:clamp(178px,18vw,224px);aspect-ratio:960/775;margin:0 auto 22px}
.intro-art{display:block;width:100%;height:auto;opacity:0;transition:opacity .25s}
.intro-art.ready{opacity:1}
.intro-art.waiting-wave{animation:waiting-wave .8s ease-in-out infinite;transform-origin:50% 85%}
.intro-brand{display:grid;justify-items:center;gap:2px;max-width:100%;margin:0 auto 9px}
.intro-brand .intro-company-cn{margin:0;color:#2b527e;font-size:clamp(21px,2.6vw,30px);font-weight:650;line-height:1.15;letter-spacing:.02em}
/* white-space:normal 只是无脚本时的兜底；脚本启动后会注入 nowrap!important 统一锁版。 */
.intro-brand .intro-company-en{margin:0;color:#527296;font-size:clamp(10px,1.1vw,13px);font-weight:450;line-height:1.2;letter-spacing:.02em;white-space:normal}
.intro-greeting{display:block;margin:0;color:#657e9c;font-size:12px;font-weight:450;line-height:1.6;letter-spacing:1.3px}
.intro-progress{height:2px;width:150px;margin:22px auto 0;background:#8eb7df44;overflow:hidden;border-radius:2px}
.intro-progress i{display:block;width:100%;height:100%;background:linear-gradient(90deg,#639fe4,#dd9ebc);transform-origin:left;transform:scaleX(var(--resource-progress,0));transition:transform .22s}
.intro .intro-status{display:flex;align-items:center;justify-content:center;gap:11px;margin:13px 0 0;min-height:24px;font-size:12px;font-weight:400;line-height:1.7;letter-spacing:.08em;color:#527296}
.intro .intro-status.is-error{display:block;font-size:11px;letter-spacing:.3px;color:#8c5575}
.loading-label{font-size:12px;line-height:1.8;font-weight:500;letter-spacing:1.2px;color:#4f7094}
.loading-english{display:inline-flex;align-items:center;gap:5px;font-size:10px;font-weight:400;letter-spacing:1px;color:#6783a2}
.loading-dots{display:inline-flex;align-items:center;gap:3px;width:17px;margin-left:1px}
.loading-dots i{width:2px;height:2px;background:#7193b8;border-radius:50%;animation:loading-dots 1.5s ease-in-out infinite}
.loading-dots i:nth-child(2){animation-delay:.18s}
.loading-dots i:nth-child(3){animation-delay:.36s;background:#c58da8}
.intro-connection{position:absolute;left:24px;right:24px;bottom:max(28px,env(safe-area-inset-bottom));display:grid;justify-content:center;gap:5px;font-size:11px;line-height:1.65;letter-spacing:.4px;font-variant-numeric:tabular-nums}
.intro-connection p{display:grid;grid-template-columns:52px minmax(0,1fr);gap:12px;margin:0;max-width:440px}
.intro-connection p>span{color:#5c7c9e}
.intro-connection b{font-weight:450;color:#416487;overflow-wrap:anywhere}
/* 错误面板不参与正常布局，只有失败时才显示。 */
.intro-error{width:min(430px,100%);margin:12px auto 0;padding:13px 17px;border:1px solid #dfb7ca;border-radius:13px;background:#fff5fae8;color:#6b4e70;text-align:center;box-shadow:0 8px 24px #587aa01c;font-size:11px;line-height:1.7}
.intro-error strong{display:block;margin-bottom:2px;color:#8c5575;font-size:13px;font-weight:650}
.intro-error p{margin:3px 0 0}
.intro-error a{color:#326ca8;text-decoration:underline;text-underline-offset:2px;white-space:normal}
.intro-error-detail{color:#7a5b75;overflow-wrap:anywhere;font-weight:550}
.intro-retry{min-height:42px;margin-top:12px;padding:8px 18px;border:1px solid #9dbdde;border-radius:8px;background:#edf5ff;color:#2f6395;font-size:12px}
.intro.leaving{opacity:0;pointer-events:none}
/* 启动层兜底：脚本没跑起来时，由页面自己把遮罩摘掉，露出已经渲染好的首页。
   只对“一直卡着不动”的状态生效，正常的错误提示与退场流程都不参与。 */
.intro.failsafe{opacity:0;visibility:hidden;pointer-events:none}
@keyframes intro-failsafe{to{opacity:0;visibility:hidden;pointer-events:none}}
.intro:not([data-phase]):not([data-failsafe]){animation:intro-failsafe .4s linear 10s forwards}
/* 降级提示条：只在兜底真正发生时才出现，固定在底部，不占文档流也不挡内容。 */
.boot-fallback-note{display:none;position:fixed;left:0;right:0;bottom:0;z-index:60;margin:0;padding:11px 18px;border-top:1px solid #ecd9ae;background:#fff8e8;color:#6d5220;font-size:12px;line-height:1.6;text-align:center}
body.boot-fallback .boot-fallback-note{display:block}
.intro.is-reduced .intro-art-wrap{display:none}

/* ---------- 11. 图片保护、入场动效与暂停策略 ---------- */
[data-protected-art]{-webkit-touch-callout:none;user-select:none;-webkit-user-select:none}
[data-protected-art] img{pointer-events:none;-webkit-user-drag:none;-webkit-touch-callout:none;user-select:none;-webkit-user-select:none}
.js .reveal{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.js .reveal.in-view{opacity:1;transform:none}
/* 切到后台或仍在启动页时暂停装饰动画，省电也避免后台空转。 */
.page-hidden .gold-spark,.page-hidden .portrait-spark,.page-hidden .portrait-art,.page-hidden .character-float,.page-hidden .paper-plane{animation-play-state:paused}
.booting .character-float,.booting .portrait-art,.booting .scene-rings i,.booting .gold-spark,.booting .star-one,.booting .paper-plane{animation-play-state:paused}

/* ---------- 12. 动效关键帧 ---------- */
@keyframes levitate{0%,100%{transform:translateY(1px)}50%{transform:translateY(-9px)}}
@keyframes orbit-turn{from{transform:rotateX(20deg) rotate(0)}to{transform:rotateX(20deg) rotate(360deg)}}
@keyframes gold-glimmer{0%,100%{opacity:.5;transform:scale(.9) rotate(-6deg)}50%{opacity:.95;transform:scale(1.06) rotate(6deg)}}
@keyframes portrait-like{0%,14%,72%,100%{transform:rotate(-5deg)}30%{transform:translateY(-4px) rotate(-2.5deg)}43%{transform:translateY(.5px) rotate(-5.6deg)}55%{transform:translateY(-2px) rotate(-3.6deg)}}
@keyframes waiting-wave{0%,100%{transform:rotate(-2deg)}50%{transform:rotate(2deg)}}
@keyframes paper-drift{0%,100%{transform:translateY(0) rotate(-3deg)}50%{transform:translateY(-4px) rotate(1deg)}}
@keyframes happy-tap{0%,100%{scale:1;translate:0 0}35%{scale:1.035;translate:0 -4px}70%{scale:1.01;translate:0 -1px}}
@keyframes loading-dots{0%,70%,100%{opacity:.28;transform:translateY(0)}35%{opacity:1;transform:translateY(-2px)}}

/* ---------- 13. 断点 ----------
   顺序即层叠：桌面 → 窄屏 → 超窄 → 减动效。新增断点请插到对应宽度区间，不要插到最前面。 */
@media(max-width:1150px){
 .timeline{gap:20px}
 .timeline h3{font-size:18px}
 .timeline p{font-size:13px}
 .header nav{gap:25px}
 .company-link .company-cn{font-size:18px}
}
@media(max-width:1000px){
 /* 回到纵向时间线：整段轨道由 ::before 画，条目的横向 ::after 关闭。 */
 .timeline{grid-template-columns:1fr;gap:26px;padding-left:28px;margin-top:0}
 .timeline::before{display:block;left:4px;right:auto;top:10px;bottom:16px;width:1px;height:auto;background:linear-gradient(180deg,#d7ad62,#c79fc0 56%,#8bb5df)}
 .timeline-item::after{display:none}
 .timeline-item{display:grid;grid-template-columns:130px minmax(0,1fr);gap:20px}
 .timeline-item::before{left:-28px;top:8px}
 .timeline time{margin:0}
 .timeline h3{font-size:20px;margin-bottom:7px}
 .timeline p{font-size:14px}
 .desktop-break{display:none}
 .contact-email{font-size:clamp(23px,2.9vw,29px);gap:15px}
 .hero-bottom{min-height:78px}
}
/* 桌面矮窗口（横屏笔记本、分屏）：压缩首屏行距与插画，避免底部音乐按钮被顶出屏外。 */
@media(min-width:761px) and (max-height:760px){
 .hero-copy>.eyebrow{margin-bottom:15px}
 .hero-english{margin:15px 0 20px}
 .hero-english::before{margin-bottom:10px}
 .hero-lead{font-size:18px;margin-bottom:10px}
 .hero-description{font-size:14px;line-height:1.85}
 .hero-bottom{margin-top:12px;min-height:72px}
 .contact-copy{padding-block:26px}
 .contact-copy h3{font-size:30px}
 .contact-copy .eyebrow{font-size:8px;margin-bottom:15px}
 .contact-description{font-size:14px;margin:15px 0}
 .contact-email{font-size:29px;margin:17px 0}
 .portrait-art{max-height:calc((var(--hero-room) - 235px)*.85)}
 .contact-heading-row{margin-bottom:22px}
 .section-heading{margin-bottom:26px}
}
@media(min-width:761px) and (max-height:500px){
 .header{min-height:60px;padding-block:6px}
 .hero{--hero-pad:12px}
 .hero-scene{height:calc(var(--hero-room) - 24px);min-height:230px}
 .hero h1{font-size:30px}
 .hero-copy>.eyebrow{font-size:9px;margin-bottom:8px}
 .hero-english{font-size:8px;margin:9px 0 12px}
 .hero-lead{font-size:15px;margin-bottom:7px}
 .hero-description{font-size:12px;line-height:1.7}
 .hero-bottom{margin-top:6px;min-height:42px}
 .hero-location{font-size:10px}
 .hero-location .location-en{font-size:8px}
}
/* 极矮窗口（手机横屏）下的启动层：插画与间距整体收紧。 */
@media(max-height:520px){
 .intro{padding-top:15px;padding-bottom:77px}
 .intro-art-wrap{width:125px;margin-bottom:10px}
 .intro-greeting{font-size:10px}
 .intro-progress{margin-top:14px}
 .intro .intro-status{margin-top:9px;font-size:10px}
 .intro-connection{bottom:max(13px,env(safe-area-inset-bottom));font-size:10px;gap:2px}
}
/* 手机与窄屏：页头变两行网格、导航收成汉堡、首屏插画移到文案上方、联系卡片改单列。 */
@media(max-width:760px){
 :root{--page-gutter:clamp(18px,5vw,28px);--header-height:68px;--hero-pad:16px}
 .header{display:grid;grid-template-columns:minmax(0,1fr) 44px;column-gap:12px;row-gap:0;align-items:center;min-height:68px;padding-top:max(8px,env(safe-area-inset-top));padding-bottom:8px}
 .header .company-link{justify-self:start;max-width:100%}
 .company-link .company-cn{font-size:16px;line-height:1.15}
 .company-link .company-en{font-size:9.3px;line-height:1.2}
 .header nav{grid-column:1/-1;justify-self:end;justify-content:flex-end;gap:24px;width:max-content;max-width:100%;margin-left:auto}
 .header nav a{font-size:12px;min-height:44px;padding-block:10px}
 /* 没有脚本时导航始终平铺，有脚本时才折叠成汉堡菜单。 */
 .js .nav-toggle{display:inline-flex;align-items:center;justify-content:center;grid-column:2;grid-row:1;justify-self:end;width:44px;height:44px;padding:0;border:1px solid #8caed066;border-radius:13px;background:#dcebf9a6;color:#355d88;transition:background .25s,border-color .25s}
 .nav-toggle:hover{background:#f3eaf5;border-color:#bda1bc}
 .menu-icon{position:relative;width:18px;height:16px}
 .menu-icon i{position:absolute;left:0;top:4px;width:18px;height:1.5px;background:currentColor;border-radius:2px;transition:transform .25s var(--ease)}
 .menu-icon i+i{top:10px}
 .menu-open .menu-icon i:first-child{transform:translateY(3px) rotate(45deg)}
 .menu-open .menu-icon i+i{transform:translateY(-3px) rotate(-45deg)}
 .js .header nav{position:absolute;grid-column:auto;grid-row:auto;right:max(var(--page-gutter),env(safe-area-inset-right));top:calc(100% + 8px);display:flex;flex-direction:column;align-items:stretch;gap:3px;width:max-content;min-width:0;max-width:calc(100vw - var(--page-gutter)*2);padding:8px;border:1px solid #b4cbe3;border-radius:17px;background:#edf5fef7;box-shadow:0 14px 38px #426d9b26;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-6px);transition:opacity .2s,transform .25s var(--ease),visibility .2s}
 .js .header.menu-open nav{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
 .js .header nav a{font-size:14px;line-height:1.35;text-align:center;justify-content:center;padding:10px 18px;min-width:0;border-radius:10px}
 .js .header nav a.active{background:#dbeafa;color:#245b91}
 .js .header nav a::after{left:50%;right:auto;width:20px;bottom:5px;transform:translateX(-50%) scaleX(0)}
 .js .header nav a.active::after{transform:translateX(-50%) scaleX(1)}
 .hero{grid-template-columns:minmax(0,1fr);gap:12px;align-content:center;padding-block:14px 22px;background:radial-gradient(ellipse at 22% 24%,#b6dbf977,transparent 51%),radial-gradient(ellipse at 92% 84%,#efc8dc66,transparent 54%),linear-gradient(145deg,#cee5fc,#dee9fa)}
 .hero-scene{grid-column:1;grid-row:1;height:clamp(170px,calc(var(--hero-room) - 340px),360px);max-width:430px;margin-inline:auto}
 .hero-copy{grid-column:1;grid-row:2}
 .hero-mascot{height:86%;max-height:86%;max-width:79%}
 /* 手机上关闭鼠标倾斜，减少合成层开销。 */
 .character-parallax{transform:none!important;will-change:auto}
 .scene-aura{display:none}
 .scene-rings{inset:6% 2% 2%}
 .scene-rings i:nth-child(2){width:100%;left:0}
 .speech-bubble{min-height:0;min-width:0;width:max-content;padding:9px 11px;border-radius:15px}
 .speech-bubble p{font-size:10px;line-height:1.75}
 .hello-bubble p{font-size:12px;line-height:1.6}
 .hello-bubble{top:2%;right:0}
 .mascot-note{bottom:0;left:0}
 .scene-coordinate{font-size:8px;bottom:13%;right:0}
 .star-one{font-size:19px}
 .spark-two{left:4%;font-size:10px}
 .spark-three{left:3%;bottom:26%;font-size:16px}
 .spark-four{right:6%;font-size:9px}
 .hero-copy>.eyebrow{font-size:9px;letter-spacing:1.7px;line-height:1.6;margin-bottom:10px}
 .hero h1{font-size:clamp(29px,min(8.5vw,4.8vh),40px);line-height:1.28;letter-spacing:-.5px}
 .hero-english{font-size:9px;letter-spacing:1.2px;line-height:1.6;margin:11px 0 15px}
 .hero-english::before{width:32px;height:2px;margin-bottom:8px}
 .hero-lead{font-size:15px;line-height:1.7;margin-bottom:8px}
 .hero-description{font-size:14px;line-height:1.8}
 .hero-bottom{margin-top:10px;min-height:55px;gap:12px;justify-content:flex-end}
 .hero-location{font-size:11px;gap:3px}
 .hero-location .location-en{font-size:8px;letter-spacing:.8px}
 .section{--section-pad:32px;min-height:var(--hero-room)}
 .section-heading{margin-bottom:26px}
 .section-heading h2{font-size:27px;gap:12px}
 .section-heading h2>span{font-size:14px}
 .section-heading>p{font-size:13.5px;line-height:1.7;letter-spacing:.9px;margin-top:7px}
 .timeline{padding-left:25px;gap:25px}
 .timeline-item{display:block}
 .timeline-item::before{left:-25px;top:7px}
 .timeline time{font-size:13px;line-height:22px;margin-bottom:7px}
 .timeline h3{font-size:19px;margin-bottom:7px}
 .timeline p{font-size:14px;line-height:1.9}
 .journey-note{margin-top:29px}
 .journey-intro{gap:4px}
 .journey-intro span:first-child{font-size:14px}
 .journey-intro span:last-child{font-size:12px;margin-left:24px}
 .journey-spark{bottom:21px;font-size:16px}
 .contact-heading-row{margin-bottom:23px}
 .paper-plane{width:78px;margin-right:0}
 .contact-card{grid-template-columns:minmax(0,1fr);grid-template-areas:"copy" "portrait";min-height:0;border-radius:21px}
 .contact-copy{padding:25px 24px 30px}
 .contact-copy .eyebrow{font-size:8px;letter-spacing:.8px;margin-bottom:14px}
 .contact-copy h3{font-size:29px;line-height:1.4}
 .contact-description{font-size:13.5px;line-height:1.85;margin:17px 0}
 .contact-email{font-size:clamp(22px,6.5vw,28px);letter-spacing:-.6px;gap:14px;margin:20px 0}
 .contact-email>span{font-size:23px}
 .contact-actions{gap:23px}
 .button{font-size:14px;gap:30px;min-height:46px;padding:12px 19px}
 .copy-email{font-size:12px;min-height:46px}
 .contact-portrait{height:clamp(210px,calc(var(--hero-room)*.34),280px);padding:28px 24px}
 .portrait-art{width:auto;height:85%;max-width:66.3%;max-height:100%}
 .portrait-caption{top:16px;left:24px;font-size:7px}
 .portrait-star{font-size:21px}
 .portrait-spark{font-size:14px}
 .portrait-plus{font-size:20px}
 .footer{gap:12px}
 .music-credit{gap:8px;max-width:100%;font-size:9px}
 .license-pill,.footer-privacy{min-height:24px;padding:2px 8px;font-size:9px}
 .intro{padding:24px 20px 105px}
 .intro-content{width:min(100%,430px);padding-inline:12px}
 .intro-art-wrap{width:clamp(168px,46vw,198px);margin-bottom:18px}
 .intro-brand{gap:2px;margin-bottom:7px}
 .intro-brand .intro-company-cn{font-size:clamp(18px,5.8vw,25px);line-height:1.15;letter-spacing:.015em}
 .intro-brand .intro-company-en{font-size:10px;line-height:1.2;letter-spacing:.015em}
 .intro-greeting{font-size:11px}
 .intro-progress{margin-top:19px;width:132px}
 .intro .intro-status{gap:9px;margin-top:11px;font-size:11px}
 .intro-error{padding:11px 13px;font-size:10px}
 .intro-connection{font-size:10px;left:20px;right:20px;bottom:max(22px,env(safe-area-inset-bottom))}
 .intro-connection p{grid-template-columns:47px minmax(0,1fr);gap:9px;max-width:calc(100vw - 40px)}
 .loading-label{font-size:11px}
 .loading-english{font-size:9px}
}
/* 手机矮窗口（横屏）再收一次首屏。 */
@media(max-width:760px) and (max-height:700px){
 .hero{gap:9px;padding-block:10px 16px}
 .hero-scene{height:clamp(150px,calc(var(--hero-room) - 315px),280px)}
 .hero-copy>.eyebrow{margin-bottom:8px}
 .hero-english{margin:8px 0 11px}
 .hero-english::before{margin-bottom:6px}
 .hero-bottom{margin-top:7px;min-height:43px}
}
/* 底栏两列：音乐署名居左、隐私声明居右，互不挤压。 */
@media(max-width:600px){
 .footer{display:grid;grid-template-columns:minmax(0,1fr) auto;grid-template-areas:"credit privacy";gap:8px}
 .music-credit{grid-area:credit;justify-self:start;width:max-content;max-width:100%}
 .footer-privacy{grid-area:privacy;justify-self:end}
 .music-attribution{line-height:1.4}
}
@media(max-width:360px){
 .company-link .company-cn{font-size:14.5px}
 .header nav{gap:22px}
 .hero-description{font-size:13px}
 .speech-bubble{min-width:0;width:max-content;padding:8px 10px}
 .speech-bubble p{font-size:10px}
 .hello-bubble p{font-size:11.5px}
 .hero-location{font-size:10px}
 .timeline p{font-size:13px}
 .contact-copy{padding-inline:20px}
 .contact-copy h3{font-size:26px}
 .contact-email{font-size:21px}
 .contact-actions{gap:20px}
}
@media(max-width:310px){
 .company-link .company-cn{font-size:13px}
 .music-credit{gap:6px;font-size:8px}
}
/* 系统减动效：直接给出最终状态，不做位移与循环动画。 */
@media(prefers-reduced-motion:reduce){
 html{scroll-behavior:auto}
 *,*::before,*::after{animation:none!important;transition:none!important}
 .js .reveal{opacity:1;transform:none}
 .character-parallax{transform:none!important;will-change:auto}
 .portrait-art{transform:rotate(-5deg)}
 .scene-aura{display:none}
}