/* ============================================================
   有据 SUBSTANTIATE · 官网样式系统
   黑白主基调 + 品牌蓝强调 · Apple 节奏 × HarmonyOS 7 材质语言
   ============================================================ */

:root{
  /* 色板 */
  --ink:#0B0C0E; --ink-2:#16181B; --ink-3:#060708;
  --paper:#FFFFFF; --paper-2:#F5F6F7;
  --text-1:#16181B; --text-2:#6B7076;
  --text-inv:#F4F5F6; --text-inv-2:#9BA0A6;
  --accent:#1D6FFF; --accent-dim:rgba(29,111,255,.12);
  --line:rgba(0,0,0,.08); --line-inv:rgba(255,255,255,.12);
  /* 字体 */
  --font:'HarmonyOS Sans','HarmonyOS Sans SC','PingFang SC','Noto Sans SC','Microsoft YaHei',sans-serif;
  /* 曲线 */
  --ease:cubic-bezier(.22,1,.36,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Lenis 惯性平滑滚动（1.3.x 推荐样式；类由 Lenis 自动挂到 <html>） */
html.has-lenis{scroll-behavior:auto}
html.lenis,html.lenis body{height:auto}
.lenis.lenis-smooth{scroll-behavior:auto!important}
.lenis.lenis-stopped{overflow:hidden}
body{font-family:var(--font);color:var(--text-1);background:var(--paper);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;font-weight:900}

.container{width:min(1120px,92vw);margin-inline:auto}
section{position:relative}

/* 无 JS / CDN 失败 / reduced-motion 时内容必须可见：
   仅在 html.js-motion（head 内联脚本确认可动画后才添加）下隐藏 reveal 元素 */
.js-motion [data-reveal]{opacity:0}

/* 首屏加载编排：初始隐藏，GSAP 就绪后由 load timeline 依次拉起（降级时随 js-motion 移除而显现） */
/* hero__title 由 SplitText 在 fonts.ready 后接管：拆分前整题隐藏，拆分后逐字驱动 */
.js-motion .nav,
.js-motion .hero__copy .eyebrow,
.js-motion .hero__sub,
.js-motion .hero__actions,
.js-motion .hero__visual,
.js-motion .hero__title{opacity:0}

/* ---------- 文字与标签 ---------- */
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--accent);margin-bottom:18px}
.eyebrow--dark{color:#6FAAFF}

/* 渐变流动文字（GSAP 官网同款；不支持 background-clip 时回退纯色，绝不变隐形）
   SplitText 逐字化后每个 char 是独立合成层（force3D/transform），父级 clip:text 穿不透合成层
   → 渐变经 --grad-img 逐字下发到 .st-char 自身（background-clip 对自身 transform 恒生效） */
.grad-text{display:inline-block;color:inherit;--grad-img:linear-gradient(94deg,#0F5AE6,#3D82FF 55%,#0F5AE6 110%)}
@supports ((-webkit-background-clip:text) or (background-clip:text)){
  .grad-text{background-image:var(--grad-img);background-size:200% 100%;
    -webkit-background-clip:text;background-clip:text;color:transparent;
    animation:gradShift 7s ease-in-out infinite}
  .grad-text .st-char{background-image:var(--grad-img);background-size:200% 100%;
    -webkit-background-clip:text;background-clip:text;color:transparent;
    animation:gradShift 7s ease-in-out infinite}
  .grad-text--dark{--grad-img:linear-gradient(94deg,#6FAAFF,#EAF3FF 55%,#6FAAFF 110%)}
  .grad-text--dark .st-char{animation-duration:8s}
  /* 拆分完成后关闭父级裁切（is-split 加在标题容器上，渐变 span 是其子级）：
     父级已无直挂文本，保留会在个别字形上产生重影 */
  .is-split .grad-text{background-image:none;-webkit-background-clip:border-box;background-clip:border-box;animation:none}
}
@keyframes gradShift{0%,100%{background-position:0% 50%}50%{background-position:100% 50%}}
@media(prefers-reduced-motion:reduce){.grad-text{animation:none}.grad-text .st-char{animation:none}}
.section-head{max-width:640px;margin-bottom:clamp(56px,8vw,96px)}
.section-head h2{font-size:clamp(30px,4.6vw,52px)}
.section-head__sub{margin-top:18px;font-size:17px;color:var(--text-2);max-width:34em}
/* ---------- 拼音打字机 ---------- */
.typewriter-copy{position:relative}
.type-caret{position:absolute;left:0;top:0;width:2px;background:var(--accent);animation:type-caret-blink 1.06s steps(1,end) infinite;pointer-events:none;z-index:2}
@keyframes type-caret-blink{0%,52%{opacity:1}53%,100%{opacity:0}}
.pinyin-ghost{position:absolute;left:0;top:0;display:flex;align-items:center;justify-content:center;font-size:.68em;letter-spacing:.02em;color:var(--text-2);border-bottom:1px dashed var(--accent);opacity:0;pointer-events:none;z-index:1}
.section-head--dark h2{color:var(--text-inv)}
.section-head--dark .section-head__sub{color:var(--text-inv-2)}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 26px;border-radius:12px;font-size:15px;font-weight:600;transition:transform .3s var(--ease),box-shadow .3s,background .3s,color .3s}
.btn--primary{background:var(--accent);color:#fff;overflow:hidden;isolation:isolate}
.btn--primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(29,111,255,.35)}
.btn--primary:active{transform:translateY(0) scale(.98)}
/* flair：hover 时白色圆从指针处扩张铺满、文字反墨色（GSAP 官网按钮同款） */
.btn__flair{display:block;position:absolute;left:var(--fx,50%);top:var(--fy,50%);width:240%;aspect-ratio:1;border-radius:50%;
  background:#fff;transform:translate(-50%,-50%) scale(0);pointer-events:none;z-index:0}
.btn__label{position:relative;z-index:1;transition:color .35s}
.btn--primary:hover .btn__label{color:var(--ink)}
.btn--ghost{border:1px solid var(--line);color:var(--text-1)}
.btn--ghost:hover{border-color:var(--text-1)}
.btn--lg{height:56px;padding:0 34px;font-size:16px;border-radius:14px}

/* ---------- 阅读进度卷轴线（滚动进度 2px 品牌渐变，JS 无 GSAP 时保持 scaleX(0) 不可见） ---------- */
.progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:80;pointer-events:none;
  background:linear-gradient(90deg,#1D6FFF,#6FAAFF);transform:scaleX(0);transform-origin:0 50%}

/* ---------- 章节指示胶囊（文字共享元素：同一容器在章节间滑动换字，跨黑章节反色） ---------- */
.section-pill{position:fixed;left:0;right:0;bottom:26px;margin-inline:auto;width:max-content;z-index:60;
  display:flex;align-items:center;gap:10px;padding:9px 18px;border-radius:99px;
  background:rgba(255,255,255,.78);backdrop-filter:blur(14px) saturate(160%);-webkit-backdrop-filter:blur(14px) saturate(160%);
  box-shadow:0 1px 0 var(--line),0 10px 30px rgba(11,12,14,.10);
  font-size:12.5px;font-weight:700;letter-spacing:.12em;color:var(--text-1);
  opacity:0;pointer-events:none;transition:opacity .4s,background .4s,color .4s,box-shadow .4s}
.section-pill.is-on{opacity:1}
.section-pill.on-dark{background:rgba(11,12,14,.62);color:var(--text-inv);box-shadow:0 1px 0 var(--line-inv),0 10px 30px rgba(0,0,0,.35)}
.section-pill__num{display:inline-block;color:var(--accent);font-variant-numeric:tabular-nums;letter-spacing:.18em}
.on-dark .section-pill__num{color:#6FAAFF}
.section-pill__mask{display:block;overflow:hidden;height:1.35em}
.section-pill__txt{display:block;line-height:1.35}

/* ---------- 导航 ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;padding:14px 0;transition:background .4s,box-shadow .4s,color .4s}
.nav__inner{display:flex;align-items:center;justify-content:space-between}
.nav__brand{display:flex;align-items:center;gap:10px;font-weight:900;font-size:18px;letter-spacing:-.01em}
.nav__logo{border-radius:7px}
.nav__links{display:flex;align-items:center;gap:30px}
.nav__links a{font-size:14px;font-weight:500;color:inherit;opacity:.72;transition:opacity .25s}
.nav__links a:hover{opacity:1}
.nav__cta{border:1px solid currentColor;padding:7px 18px;border-radius:99px;opacity:1!important}
.nav.is-scrolled{background:rgba(255,255,255,.72);backdrop-filter:blur(18px) saturate(170%);-webkit-backdrop-filter:blur(18px) saturate(170%);box-shadow:0 1px 0 var(--line)}
.nav.nav-invert{color:var(--text-inv)}
.nav.nav-invert.is-scrolled{background:rgba(11,12,14,.6);box-shadow:0 1px 0 var(--line-inv)}
@media(max-width:760px){.nav__links a:not(.nav__cta){display:none}}

/* ---------- Hero ---------- */
.hero{position:relative;padding:clamp(140px,18vh,190px) 0 clamp(64px,9vw,110px);background:var(--paper)}
.hero__glow{position:absolute;top:6%;right:-8%;width:min(720px,72vw);aspect-ratio:1;border-radius:50%;
  background:radial-gradient(closest-side,rgba(29,111,255,.13),rgba(29,111,255,0) 72%);pointer-events:none;z-index:0}
.hero .container{position:relative;z-index:1}
.hero__grid{display:grid;grid-template-columns:5fr 6fr;gap:clamp(40px,6vw,88px);align-items:center}
.hero__title{font-size:clamp(42px,6.6vw,80px);white-space:nowrap}
.hero__sub{margin-top:26px;font-size:clamp(16px,1.6vw,19px);color:var(--text-2);max-width:30em}
.hero__actions{margin-top:36px;display:flex;gap:14px;flex-wrap:wrap}
.hero__visual{display:flex;justify-content:center}

/* ---------- 设备框 ---------- */
.device{position:relative;width:min(340px,78vw);border-radius:46px;padding:10px;background:#151719;
  box-shadow:0 24px 70px rgba(11,12,14,.16),0 2px 10px rgba(11,12,14,.10)}
.device--hero{width:min(380px,82vw)}
.device__screen{position:relative;border-radius:36px;overflow:hidden;background:#fff}
/* 状态栏与挖孔由截图自带，设备框不再叠加 */
.device__screen img{width:100%;height:auto}

/* ---------- 核心能力（图库式：左列条目 + 右侧大屏，Flip 共享转场） ---------- */
.features{padding:clamp(80px,12vw,150px) 0;background:var(--paper)}
.gallery{display:grid;grid-template-columns:5fr 6fr;gap:clamp(36px,6vw,88px);align-items:start}
.gallery__panel{position:relative}
.gallery__item{position:relative;z-index:1;padding:22px 0;border-top:1px solid var(--line)}
/* 选中态胶囊：JS 测量活动条目后用 GSAP 滑动跟随（又一层共享元素动效） */
.gallery__marker{position:absolute;left:-18px;width:calc(100% + 36px);top:0;height:0;border-radius:16px;
  background:var(--accent-dim);opacity:0;pointer-events:none}
.gallery.is-enhanced .gallery__marker{opacity:1}
.gallery__item:first-child{border-top:0;padding-top:0}
.gallery__tab{display:flex;align-items:baseline;gap:16px;width:100%;background:none;border:0;padding:0;font:inherit;color:var(--text-1);text-align:left;cursor:default}
.is-enhanced .gallery__tab{cursor:pointer}
.gallery__num{font-size:13px;font-weight:700;letter-spacing:.2em;color:var(--text-2);transition:color .3s}
.gallery__ttl{font-size:clamp(20px,2.4vw,27px);font-weight:900;letter-spacing:-.02em;line-height:1.25;opacity:.4;transition:opacity .3s}
.is-enhanced .gallery__tab:hover .gallery__ttl{opacity:.75}
.gallery__item.is-active .gallery__num{color:var(--accent)}
.gallery__item.is-active .gallery__ttl{opacity:1}
.gallery__desc{margin-top:12px;font-size:15.5px;color:var(--text-2);max-width:28em}
.gallery.is-enhanced .gallery__item:not(.is-active) .gallery__desc{display:none}
.gallery__stage{display:flex;flex-direction:column;align-items:center;gap:36px}
/* 图库切换（Flip absolute）期间 stage 定高不塌陷——否则文档变短，底部露出灰色背景 */
.is-enhanced .gallery__stage{gap:0;position:relative;width:100%;max-width:340px;margin-inline:auto;height:calc(min(340px, 80vw) * 2.157 + 20px)}
.is-enhanced .gallery__stage .device{position:absolute;left:50%;top:0;transform:translateX(-50%)}
/* js-motion（head 内联脚本确认可动画）下只显示当前屏；GSAP 缺失/降级时移除该类 → 四屏全部可见 */
.js-motion .gallery__stage .device:not(.is-active){display:none}
.gallery__stage .device{width:min(340px,80vw)}
.device.is-zoomable{cursor:pointer}
.device.is-zoomable:focus-visible{outline:2px solid var(--accent);outline-offset:6px}

/* ---------- 使用场景 ---------- */
.scenes{padding:clamp(80px,12vw,150px) 0;background:var(--paper-2)}
.scenes__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,3vw,44px)}
.scene{position:relative;display:flex;flex-direction:column;align-items:center;text-align:center}
.scene .device{width:min(260px,70vw)}
.scene h3{margin-top:28px;font-size:20px}
.scene p{margin-top:8px;font-size:14.5px;color:var(--text-2);max-width:22em}
/* 指针聚光：蓝色光斑跟随鼠标（--mx/--my 由 JS 写入） */
.scene::after{content:'';position:absolute;inset:0;border-radius:24px;pointer-events:none;opacity:0;transition:opacity .45s;
  background:radial-gradient(520px circle at var(--mx,50%) var(--my,50%),rgba(29,111,255,.07),transparent 45%)}
.scene:hover::after{opacity:1}
@media(max-width:900px){.scenes__grid{grid-template-columns:1fr;row-gap:64px}}

/* ---------- 社区宣言（GSAP 官网 highlight-word 同款：滚动逐字点亮，scrub 双向） ---------- */
.statement{padding:clamp(96px,14vw,180px) 0;background:var(--paper);text-align:center}
.statement__text{max-width:22em;margin-inline:auto;font-size:clamp(28px,4.6vw,54px);font-weight:900;letter-spacing:-.02em;line-height:1.35}
.statement__text .il-c{display:inline-block}
.statement__text .il-em{color:var(--accent)}
/* 静态呼吸：三个关键词在两种蓝之间缓慢吐纳（与滚动点亮的 opacity 互不相干） */
@media(prefers-reduced-motion:no-preference){
  .statement__text .il-em{animation:ilBreath 3.2s ease-in-out infinite alternate}
}
@keyframes ilBreath{from{color:#1D6FFF}to{color:#5E9BFF}}

/* ---------- HarmonyOS 7 章节（黑底）---------- */
.harmony{padding:clamp(96px,13vw,170px) 0 clamp(60px,8vw,110px);background:var(--ink);color:var(--text-inv)}
.hkit{display:grid;grid-template-columns:4fr 7fr;gap:clamp(36px,5vw,80px);align-items:center;padding:clamp(40px,6vw,88px) 0}
.hkit--flip .hkit__copy{order:2}
.hkit--flip .hkit__stage{order:1}
.hkit__tag{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.14em;color:#6FAAFF;border:1px solid var(--line-inv);border-radius:99px;padding:7px 16px;margin-bottom:26px}
.hkit__copy h3{font-size:clamp(22px,2.6vw,32px)}
.hkit__desc{margin-top:16px;font-size:15.5px;color:var(--text-inv-2);max-width:26em}
.hkit__points{display:flex;gap:10px;margin-top:24px;list-style:none;flex-wrap:wrap}
.hkit__points li{font-size:13px;color:#6FAAFF;border:1px solid var(--line-inv);border-radius:99px;padding:6px 15px}
.hkit__stage{position:relative;display:flex;justify-content:center}

/* 舞台通用 */
.immersive-stage,.grip-stage{padding:24px 0}
.immersive-stage .device,.grip-stage .device{width:min(360px,74vw)}
.device--dark{background:#1E2226;box-shadow:0 30px 90px rgba(0,0,0,.55),0 2px 10px rgba(0,0,0,.4)}

/* 真实录屏演示视频（沉浸光感 / 智感握姿）：按视频自身 20:9 比例撑开设备框，不裁剪 */
.device-video{width:100%;height:auto;display:block}

/* ---------- 下载（左文右图：登录页 = 打开有据的第一屏） ---------- */
.download{padding:clamp(70px,9vw,120px) 0 0;background:var(--ink);color:var(--text-inv)}
/* 顶部一抹品牌蓝辉光，呼应 Hero 光斑 */
.download::before{content:'';position:absolute;top:-140px;left:50%;transform:translateX(-50%);
  width:min(880px,92vw);height:440px;border-radius:50%;pointer-events:none;
  background:radial-gradient(closest-side,rgba(29,111,255,.14),rgba(29,111,255,0) 72%)}
.download__grid{display:grid;grid-template-columns:6fr 5fr;gap:clamp(40px,6vw,88px);align-items:center}
.download__copy{text-align:left}
.download__icon{width:72px;height:72px;border-radius:17px;margin-bottom:24px;box-shadow:0 18px 50px rgba(29,111,255,.28)}
.download h2{font-size:clamp(32px,4.6vw,54px)}
.download__meta{margin-top:14px;font-size:14px;color:var(--text-inv-2);letter-spacing:.08em}
.download__actions{margin-top:32px}
.download__slogan{margin-top:26px;font-size:13px;color:var(--text-inv-2);letter-spacing:.2em}
.download__visual{display:flex;justify-content:center}
.download .device{width:min(310px,72vw)}
@media(max-width:900px){
  .download__grid{grid-template-columns:1fr;gap:44px}
  .download__copy{text-align:center}
  .download__icon{margin-inline:auto}
  /* letter-spacing 会在末字符后多留一份间距，居中文本因此偏半格：
     正字距偏左（补 padding-left）、负字距偏右（补 padding-right）。
     box-sizing:border-box 下不会撑出横向滚动。 */
  .hero__copy .eyebrow{padding-left:.14em}
  .hero__copy h1{padding-right:.02em}
  .download__copy h2{padding-right:.02em}
  .download__meta{padding-left:.08em}
  .download__slogan{padding-left:.2em}
}

/* ---------- Footer ---------- */
.download__beian{display:block;margin-top:6px;text-align:center;font-size:12px;color:var(--text-inv-2)}
.download__beian:hover{color:var(--accent)}

/* ---------- 响应式 ---------- */
@media(max-width:900px){
  /* 信息密度：压缩纵向节奏与字号，一屏承载更多内容 */
  .hero{padding:122px 0 46px}
  .hero__grid{grid-template-columns:1fr;gap:28px}
  .hero__copy{text-align:center}
  .hero__sub{margin:16px auto 0;font-size:15px;max-width:30em}
  .hero__actions{justify-content:center;margin-top:20px}
  .section-head{margin-bottom:34px}
  .section-head h2{font-size:34px}
  .section-head__sub{margin-top:10px;font-size:14.5px}
  .features{padding:60px 0}
  .gallery{grid-template-columns:1fr;gap:22px}
  .gallery__item{padding:15px 0}
  .gallery__ttl{font-size:19px}
  .gallery__desc{margin-top:9px;font-size:14px}
  .scenes{padding:60px 0}
  .scene{gap:18px}
  .scene .device{width:min(300px,72vw)}
  .statement{padding:66px 0}
  .statement__text{font-size:38px}
  .harmony{padding:66px 0 42px}
  .hkit{grid-template-columns:1fr;gap:20px;padding:20px 0}
  .hkit__copy{order:1!important}
  .hkit__stage{order:2!important}
  .hkit__tag{margin-bottom:12px;padding:5px 13px}
  .hkit__copy h3{font-size:23px}
  .hkit__desc{margin-top:10px;font-size:14px}
  .hkit__points{margin-top:14px}
  .immersive-stage .device,.grip-stage .device{width:min(280px,62vw)}
  .download{padding:60px 0 10px}
  .download__grid{grid-template-columns:1fr;gap:24px}
  .download__icon{width:54px;height:54px;border-radius:13px;margin-bottom:14px}
  .download h2{font-size:31px}
  .download__meta{margin-top:10px;font-size:13px}
  .download__actions{margin-top:20px}
  .download__slogan{margin-top:16px}
  .download__beian{margin-top:34px}
}
@media(max-width:560px){
  .hero{padding:106px 0 38px}
  .section-head h2{font-size:29px}
  .statement__text{font-size:31px}
  .scene .device{width:min(250px,66vw)}
  .download h2{font-size:27px}
}

/* ---------- 标题逐字揭示：由官方 SplitText 驱动（mask 裁切结构由插件生成，无需手写样式） ---------- */

/* ---------- 共享元素转场：点击场景截图放大 ---------- */
.scene.is-zoomable{cursor:pointer}
.scene.is-zoomable:focus-visible{outline:2px solid var(--accent);outline-offset:6px;border-radius:24px}
.zoom{position:fixed;inset:0;z-index:100;display:grid;place-items:center}
.zoom[hidden]{display:none}
.zoom__backdrop{position:absolute;inset:0;background:rgba(6,8,12,.88);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);opacity:0}
.zoom__stage{position:relative;z-index:1;width:min(430px,88vw)}
.zoom__stage .device__screen{border-radius:34px;box-shadow:0 40px 120px rgba(0,0,0,.62)}
.zoom__close{position:absolute;top:22px;right:22px;z-index:2;width:44px;height:44px;display:grid;place-items:center;
  border:1px solid var(--line-inv);border-radius:50%;background:transparent;color:var(--text-inv);cursor:pointer;
  transition:transform .3s var(--ease),background .3s}
.zoom__close:hover{transform:rotate(90deg);background:rgba(255,255,255,.1)}
.zoom__close svg{width:20px;height:20px}

/* ---------- 动效降级 ---------- */
@media(prefers-reduced-motion:reduce){
  .device-video{width:100%}
}