/* ============================================================
   CHR 杭可集团 · 单页官网  v2
   视觉：浅灰 / 银白 / 冷白 + 极少量冷蓝科技光效 + 品牌红
   字体：思源宋体 Black（标题·金属渐变） / 黑体（正文） / Space Grotesk（数据）
   ============================================================ */

:root{
  /* 色板 */
  --bg:        #F4F6F9;
  --bg-2:      #EBEEF2;
  --bg-deep:   #0E1216;
  --ink:       #10151B;
  --ink-2:     #5C6673;
  --ink-3:     #99A2AD;
  --line:      rgba(16,21,27,.08);
  --blue:      #3D7BFD;
  --red:       #9c1d2e;
  --brand-red: #9c1d2e;   /* 品牌红 · 仅用于 CHR 标识 */
  --white:     #FFFFFF;

  /* 字体 */
  --font-display: "Noto Serif SC","Songti SC","SimSun",serif;   /* 思源宋体 Black */
  --font-cn:      "Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-en:      "Space Grotesk","Noto Sans SC","PingFang SC",sans-serif;

  /* 布局 */
  --max-w: 1360px;
  --pad-x: clamp(20px, 6vw, 96px);
  --radius: 22px;

  --ease-out: cubic-bezier(.22,.61,.2,1);
  --ease-ink: cubic-bezier(.62,.04,.2,1);
}

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

html{ scroll-behavior:smooth; scroll-padding-top:76px; }

body{
  font-family:var(--font-cn);
  background:var(--bg);
  color:var(--ink);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
button{ font-family:inherit; border:0; background:none; cursor:pointer; }
::selection{ background:var(--blue); color:#fff; }

.eyebrow{
  font-family:var(--font-en);
  font-size:11px; font-weight:500;
  letter-spacing:.38em; text-transform:uppercase;
  color:#000000;
}
.eyebrow--light{ color:rgba(255,255,255,.45); }

/* ---------------- 大标题的扫描揭示 + 金属渐变 ---------------- */
/* 深色底上的钛银渐变（首屏 / 宣传片） */
.ink--metal-light{
  background:linear-gradient(180deg, #FFFFFF 22%, #DDE5EE 55%, #9FB0C4 100%);
  -webkit-background-clip:text; background-clip:text;
  color:transparent; -webkit-text-fill-color:transparent;
}
/* 浅色底上的锻铁渐变（杭可仪器 / 探索杭可） */
.ink--metal-dark{
  background:linear-gradient(180deg, #262E38 15%, #10151B 52%, #46566B 100%);
  -webkit-background-clip:text; background-clip:text;
  color:transparent; -webkit-text-fill-color:transparent;
}
.ink{
  display:inline-block;
  -webkit-clip-path:inset(-20% 100% -20% 0);
  clip-path:inset(-20% 100% -20% 0);
  transition:-webkit-clip-path 1.5s var(--ease-ink), clip-path 1.5s var(--ease-ink);
}
[data-reveal].is-in .ink,
.is-revealed .ink{
  -webkit-clip-path:inset(-20% 0 -20% 0);
  clip-path:inset(-20% 0 -20% 0);
}
.ink--hero{
  animation:inkStroke 1.7s var(--ease-ink) .5s forwards;
}
@keyframes inkStroke{
  from{ -webkit-clip-path:inset(-20% 100% -20% 0); clip-path:inset(-20% 100% -20% 0); }
  to{ -webkit-clip-path:inset(-20% 0 -20% 0); clip-path:inset(-20% 0 -20% 0); }
}

/* ---------------- 进场 / 滚动显现 ---------------- */
.load-seq{
  opacity:0; transform:translateY(26px);
  animation:seqIn 1s var(--ease-out) forwards;
  animation-delay:calc(.25s + var(--i,0) * .18s);
}
@keyframes seqIn{ to{ opacity:1; transform:none; } }

[data-reveal]{
  opacity:0; transform:translateY(34px);
  transition:opacity .9s var(--ease-out), transform .9s var(--ease-out);
  transition-delay:calc(var(--d,0) * 90ms);
}
[data-reveal].is-in{ opacity:1; transform:none; }

/* ============================================================
   顶部导航 + CHR 粒子 LOGO
   ============================================================ */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:100;
  display:flex; align-items:center; gap:40px;
  height:76px;
  padding:0 var(--pad-x);
  color:#000000;
  transition:background .45s ease, color .45s ease, box-shadow .45s ease,
             backdrop-filter .45s ease, height .45s ease;
}

/* --- LOGO --- */
.brandmark{
  display:flex; align-items:center; gap:9px;   /* 更靠近 CHR */
  position:relative;
}
.brandmark__mark{
  position:relative;
  width:132px; height:36px;
  display:block;
}
#logoCanvas{
  width:132px; height:36px;
  display:block;
}
/* WebGL 不可用时的纯文字回退 */
.brandmark__chr{
  position:absolute; inset:0;
  display:none;
  align-items:center; justify-content:center;
  font-family:var(--font-en);
  font-size:26px; font-weight:600; letter-spacing:.1em;
  color:var(--red);
}
.brandmark.no-webgl #logoCanvas{ display:none; }
.brandmark.no-webgl .brandmark__chr{ display:flex; }


.brandmark__txt{
  display:flex; flex-direction:column; justify-content:center;
  gap:3px;
  padding-left:9px;
  border-left:1px solid currentColor;
}
.brandmark__cn{
  font-size:17px; font-weight:600;
  letter-spacing:.2em;
  line-height:1;
  opacity:.92;
  transition:letter-spacing .5s var(--ease-out), opacity .4s;
}
.brandmark__en{
  font-size:7px; font-weight:500;
  letter-spacing:.4em;
  line-height:1;
  opacity:.62;
  white-space:nowrap;
}
.brandmark:hover .brandmark__cn{ letter-spacing:.26em; opacity:1; }



/* Unified raster logo, replacing the previous canvas-generated CHR mark. */
.brandmark {
  min-width: 0;
}
.brandmark__logo {
  display: block;
  width: min(250px, 28vw);
  height: 46px;
  object-fit: contain;
  object-position: left center;
}
.nav.is-solid .brandmark__logo {
  height: 42px;
}
@media (max-width: 760px) {
  .brandmark__logo {
    width: min(210px, 45vw);
    height: 38px;
  }
}
@media (max-width: 520px) {
  .brandmark__logo {
    width: min(170px, 52vw);
    height: 34px;
  }
}

.nav__links{
  margin-left:auto;
  display:flex; gap:34px;
  font-size:14px; letter-spacing:.1em;
}
.nav__links a{ opacity:.78; transition:opacity .25s; position:relative; }
.nav__links a::after{
  content:""; position:absolute; left:0; bottom:-6px;
  width:100%; height:1px; background:currentColor;
  transform:scaleX(0); transform-origin:left;
  transition:transform .35s var(--ease-out);
}
.nav__links a:hover{ opacity:1; }
.nav__links a:hover::after{ transform:scaleX(1); }

.nav__cta{
  font-size:13px; letter-spacing:.12em;
  padding:9px 22px;
  border:1px solid rgba(255,255,255,.4);
  border-radius:100px;
  transition:all .3s ease;
}
.nav__cta:hover{ background:#fff; color:var(--ink); border-color:#fff; }

.nav.is-solid{
  height:66px;
  color:var(--ink);
  background:rgba(244,246,249,.72);
  -webkit-backdrop-filter:blur(18px) saturate(1.4);
  backdrop-filter:blur(18px) saturate(1.4);
  box-shadow:0 1px 0 var(--line);
}
.nav.is-solid .nav__cta{ border-color:rgba(16,21,27,.25); }
.nav.is-solid .nav__cta:hover{ background:var(--ink); color:#fff; border-color:var(--ink); }
.nav.is-solid .brandmark__txt{ border-left-color:rgba(16,21,27,.2); }

/* ============================================================
   SECTION 1 · 首屏视频
   ============================================================ */
.hero{
  position:relative;
  height:100vh; height:100svh;
  min-height:600px;
  overflow:hidden;
  color:#fff;
  background:var(--bg-deep);
}
.hero__media{ position:absolute; inset:0; }
.hero__image{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
/* 首屏静态背景图（替代循环宣传片视频） */
.hero__video{ position:absolute; inset:0; width:100%; height:100%; object-fit:cover; }
.hero.video-failed .hero__video{ display:none; }

.hero__fallback{
  position:absolute; inset:0;
  background:
    radial-gradient(120% 90% at 18% 30%, rgba(61,123,253,.16), transparent 55%),
    radial-gradient(90% 70% at 82% 78%, rgba(180,196,215,.14), transparent 60%),
    linear-gradient(155deg, #171C22 0%, #0E1216 48%, #12181F 100%);
}
.hero__fallback::after{
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:72px 72px;
  -webkit-mask-image:radial-gradient(80% 70% at 50% 45%, #000 20%, transparent 100%);
  mask-image:radial-gradient(80% 70% at 50% 45%, #000 20%, transparent 100%);
}
.hero__fallback-tag{
  position:absolute; right:22px; bottom:20px; z-index:2;
  font-size:12px; color:rgba(255,255,255,.4);
  letter-spacing:.05em;
  border:1px dashed rgba(255,255,255,.22);
  border-radius:8px; padding:7px 12px;
  opacity:0; transition:opacity .5s;
}
.hero.video-failed .hero__fallback-tag{ opacity:1; }
.hero__fallback-tag b{ color:rgba(255,255,255,.75); font-weight:500; }

.hero__shade{
  position:absolute; inset:0;
  background:
    linear-gradient(90deg, rgba(8,11,14,.62) 0%, rgba(8,11,14,.28) 38%, rgba(8,11,14,0) 62%),
    linear-gradient(0deg, rgba(8,11,14,.55) 0%, rgba(8,11,14,0) 34%);
}

.hero__content{
  position:absolute; z-index:3;
  left:var(--pad-x);
  bottom:clamp(84px, 16vh, 168px);
  max-width:min(820px, 86vw);
}
.hero__eyebrow{
  font-family:var(--font-en);
  font-size:12px; font-weight:500;
  letter-spacing:.44em; text-transform:uppercase;
  color:rgba(255,255,255,.55);
  margin-bottom:20px;
}
.hero__title{
  font-family:var(--font-display);
  font-size:clamp(64px, 10.5vw, 105px);
  font-weight:900;
  letter-spacing:.16em;
  line-height:1.1;
  filter:drop-shadow(0 10px 60px rgba(0,0,0,.45));
}
.hero__sub{
  margin-top:22px;
  font-size:clamp(14px, 1.35vw, 17px);
  font-weight:300;
  letter-spacing:.14em;
  color:rgba(255,255,255,.82);
  display:flex; align-items:center; flex-wrap:wrap;
}
.hero__sub-divider{
  display:inline-block;
  width:44px; height:1px; margin:0 18px;
  background:linear-gradient(90deg, rgba(255,255,255,.6), rgba(61,123,253,.9));
}

/* 首屏完整版视频弱入口：低对比毛玻璃 + 细边框，悬停后才增强可点击感 */
.hero__full-video{
  position:absolute; z-index:4;
  right:var(--pad-x);
  bottom:clamp(108px, 18vh, 176px);
  display:inline-flex; align-items:center; gap:10px;
  min-height:42px; padding:7px 12px 7px 8px;
  color:rgba(255,255,255,.72);
  background:rgba(13,20,29,.18);
  border:1px solid rgba(255,255,255,.22);
  border-radius:10px;
  -webkit-backdrop-filter:blur(10px) saturate(112%);
  backdrop-filter:blur(10px) saturate(112%);
  box-shadow:0 10px 28px rgba(0,0,0,.08);
  cursor:pointer;
  transition:transform .24s ease, background .24s ease, border-color .24s ease, color .24s ease, box-shadow .24s ease;
}
.hero__full-video:hover{
  color:#fff;
  background:rgba(13,20,29,.34);
  border-color:rgba(255,255,255,.42);
  transform:translateY(-2px);
  box-shadow:0 14px 34px rgba(0,0,0,.16);
}
.hero__full-video-icon{
  width:27px; height:27px; flex:0 0 27px;
  display:grid; place-items:center;
  border:1px solid rgba(255,255,255,.32);
  border-radius:50%;
  background:rgba(255,255,255,.06);
}
.hero__full-video-icon svg{ width:15px; height:15px; }
.hero__full-video-copy{ display:flex; flex-direction:column; align-items:flex-start; line-height:1.12; white-space:nowrap; }
.hero__full-video-cn{ font-size:12px; font-weight:500; letter-spacing:.08em; }
.hero__full-video-en{ margin-top:3px; font-family:var(--font-en); font-size:8px; letter-spacing:.12em; text-transform:uppercase; opacity:.56; }
.hero__full-video-arrow{ font-family:var(--font-en); font-size:12px; opacity:.48; transition:transform .24s ease, opacity .24s ease; }
.hero__full-video:hover .hero__full-video-arrow{ transform:translate(1px,-1px); opacity:.9; }

.hero__scrollcue{
  position:absolute; z-index:3;
  left:50%; bottom:26px; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:10px;
}
.hero__scrollcue-line{
  width:1px; height:44px;
  background:rgba(255,255,255,.35);
  position:relative; overflow:hidden;
}
.hero__scrollcue-line::after{
  content:""; position:absolute; left:0; top:-100%;
  width:100%; height:100%;
  background:linear-gradient(180deg, transparent, #fff);
  animation:cueDrop 2.2s ease-in-out infinite;
}
@keyframes cueDrop{ 0%{top:-100%} 55%,100%{top:100%} }
.hero__scrollcue-text{
  font-family:var(--font-en);
  font-size:9px; letter-spacing:.5em;
  color:rgba(255,255,255,.45);
}

/* ============================================================
   SECTION 2 · 杭可仪器
   ============================================================ */
.instruments{
  position:relative;
  height:160vh;
  background:linear-gradient(180deg,#F4F8FE 0%,#EAF2FB 100%);
}
.instruments__pin{
  position:sticky; top:0;
  height:100vh; height:100svh;
  min-height:620px; overflow:hidden;
}
.instruments__inner{
  position:relative; z-index:2;
  display:grid; grid-template-columns:3.4fr 1.6fr; gap:40px; align-items:center;
  max-width:1760px; margin:0 auto;
  height:100%;
  padding:0 20px;
}

/* —— 纯图无装饰（2026-09-12）：整图原比例展示，无边框/角标 —— */
.instruments__frame{ position:relative; will-change:transform,filter; margin-top:-60px; }
.instruments__visual{
  position:relative; z-index:1;
  /* 甲方现网图为 1313x1198，按甲方现网口径 16:9 裁切显示（本地 v6 png 原生比例≈16:9 不受影响） */
  aspect-ratio:16 / 9;
  overflow:hidden;
}
.instruments__visual img{
  display:block;
  width:100%; height:100%;
  object-fit:cover;
  user-select:none; -webkit-user-drag:none;
}
/* 图片上方两行英文（原图内置文字，抠图后以 HTML 还原放在图上方，字号间距颜色按客户给定值） */
.top-left-english{
  margin:0;
  font-size:13px;
  letter-spacing:3px;
  color:#000000;
  line-height:1.9;
  text-transform:uppercase;
}
.instruments__frame.is-placeholder .instruments__visual img{ opacity:.92; }

/* 右侧内容栏（JS 滚动驱动淡入） */
.instruments__content{
  opacity:0; transform:translateX(46px);
  will-change:transform,opacity;
  margin-top:80px;
}
.instruments__eyebrow{
  display:block;
  font-family:var(--font-en);
  font-size:13px; letter-spacing:.35em; color:#000000; margin-bottom:16px;
}
.instruments__title{
  font-family:var(--font-display);
  font-size:clamp(40px, 4.2vw, 56px);
  font-weight:900;
  letter-spacing:.18em;
  line-height:1.14;
  margin-bottom:20px;
}
/* English title stays inside the right column without affecting Chinese. */
html[lang="en"] .instruments__title{
  font-size:clamp(30px, 3.2vw, 44px);
  letter-spacing:.02em;
  overflow-wrap:break-word;
}
.instruments__desc{
  font-size:16px; line-height:1.9; color:#000000; margin-bottom:32px; max-width:460px;
}
.instruments__btn{
  display:inline-flex; align-items:center; justify-content:center; gap:10px;
  align-self:flex-start;
  background:#0F2347; color:#fff; padding:14px 32px; border-radius:6px;
  font-size:15px; font-weight:500; letter-spacing:.06em;
  text-decoration:none;
  box-shadow:0 8px 22px rgba(15,35,71,.18);
  transition:background .3s, transform .22s ease, box-shadow .3s;
}
.instruments__btn:hover{
  background:#1D4ED8; color:#fff;
  transform:translateY(-2px);
  box-shadow:0 12px 28px rgba(29,78,216,.25);
}
.instruments__btn-arrow{ font-family:var(--font-en); transition:transform .22s ease; }
.instruments__btn:hover .instruments__btn-arrow{ transform:translateX(3px); }

/* 三项能力栏（参考图：蓝图标 + 名称 + 灰色副标，上分隔线；图标为图片，居中于下方文字） */
.instruments__features{
  display:grid; grid-template-columns:repeat(3,1fr); gap:24px;
  margin-top:56px; padding-top:32px;
  border-top:1px solid rgba(147,197,253,0.3);
}
.feature{ display:flex; flex-direction:column; align-items:center; text-align:center; }
.feature__icon{ width:56px; height:56px; margin-bottom:12px; object-fit:contain; }
.feature h4{ font-size:16px; color:#0F2347; margin-bottom:6px; letter-spacing:.04em; }
.feature p{ font-size:13px; color:#000000; letter-spacing:.06em; }
/* ============================================================
   SECTION 3 · 企业重点数据
   ============================================================ */
.data{
  position:relative;
  padding:clamp(120px, 16vh, 200px) var(--pad-x);
  background:linear-gradient(180deg, var(--bg) 0%, #EFF2F6 100%);
  overflow:hidden;
}
.data__canvas{ position:absolute; inset:0; width:100%; height:100%; opacity:.8; }
.data__inner{ position:relative; z-index:2; max-width:var(--max-w); margin:0 auto; }
.data__grid{ display:grid; grid-template-columns:repeat(4, 1fr); gap:0; }
.stat{
  padding:38px 34px 30px;
  border-left:1px solid var(--line);
  display:flex; flex-direction:column;
}
.stat:first-child{ border-left:0; }
.stat__en{
  font-family:var(--font-en);
  font-size:10px; font-weight:500; letter-spacing:.3em;
  color:#000000; margin-bottom:26px;
}
.stat__num{
  font-family:var(--font-en);
  font-size:clamp(46px, 5.4vw, 84px);
  font-weight:500; line-height:1; letter-spacing:-.01em;
  display:flex; align-items:flex-start;
  font-variant-numeric:tabular-nums;
}
.stat__num--code{ font-size:clamp(38px, 4.2vw, 62px); letter-spacing:.03em; }
.stat__suffix{
  font-style:normal; font-size:.44em;
  margin:.14em 0 0 .12em; color:var(--blue); font-weight:500;
}
.stat__label{
  margin-top:16px; font-size:14px; font-weight:300;
  letter-spacing:.1em; color:#000000;
}
.data__note{ margin-top:64px; font-size:11px; letter-spacing:.08em; color:var(--ink-3); }

/* ============================================================
   SECTION 4 · 企业宣传片
   ============================================================ */
.film{
  position:relative;
  padding:clamp(70px, 10vh, 90px) 60px clamp(80px, 12vh, 110px);
  /* 浅罩 + 工业插画背景（film-bg-2026.jpg，豆包水印已去除） */
  background:linear-gradient(180deg, rgba(234,242,251,.5), rgba(244,248,254,.5)), url(../images/film-bg-2026.jpg) center/cover no-repeat;
  overflow:hidden; text-align:center;
}
.film__head-title-row{ position:relative; }
/* 标题同行左侧英文块：淡蓝横线在文字上方一行（与 OUR 等长）；文字与下方 HANGKE GROUP 左对齐 */
.film__eyebrow-top{
  position:absolute; left:calc(50% - 764px); top:50%; transform:translateY(-50%);
  font-family:var(--font-en);
  font-size:14px; letter-spacing:.3em; color:#000000; line-height:1.8; text-align:left;
}
.film__eyebrow-top::before{
  content:""; display:block; width:34px; height:2px; background:#93C5FD;
  margin-bottom:12px;
}
.film__head{ position:relative; z-index:2; margin-bottom:40px; }
.film__title{
  position:relative;
  font-family:var(--font-display);
  font-size:clamp(36px, 4vw, 48px);
  font-weight:900; letter-spacing:.14em;
  margin-bottom:22px;
}
/* 标题正下方蓝色短线条（宣=5 字中的第 3 字，恰为标题中心；样式参照探索杭可 eyebrow 蓝线） */
.film__title::after{
  content:""; position:absolute; left:50%; bottom:-14px;
  width:36px; height:2px; background:#60A5FA;
  margin-left:-18px;
}
.film__sub{ font-size:20px; letter-spacing:.45em; color:#000000; }
.film__en{
  font-family:var(--font-en);
  font-size:14px; letter-spacing:.4em; color:#000000; margin-top:8px;
}
.film__frame{
  position:relative; z-index:2;
  max-width:1100px; margin:0 auto;
  border-radius:20px; overflow:hidden;
  background:linear-gradient(135deg,#1a3a5c 0%,#2d6a9f 50%,#4a90c8 100%);
  /* 外框：白色描边垫层 + 白色细框（与浅色背景一致，参照效果图帧缘白线）+ 投影 */
  box-shadow:0 0 0 12px rgba(255,255,255,0.85), 0 0 0 14px rgba(255,255,255,0.85), 0 24px 60px rgba(30,80,160,0.2);
  aspect-ratio:16 / 9;
  cursor:pointer;
}
.film__poster{
  position:absolute; inset:0; width:100%; height:100%;
  object-fit:cover;
  transition:transform 1.4s var(--ease-out), opacity .6s;
}
.film__frame:hover .film__poster{ transform:scale(1.035); }
.film__vignette{
  position:absolute; inset:0;
  background:
    linear-gradient(0deg, rgba(0,0,0,.55), transparent 42%),
    radial-gradient(120% 100% at 50% 50%, transparent 55%, rgba(0,0,0,.35));
  transition:opacity .6s;
}
.film__play{
  position:absolute; z-index:3;
  left:50%; top:50%; transform:translate(-50%,-50%);
  width:88px; height:88px; border-radius:50%;
  color:#fff; display:grid; place-items:center;
  background:rgba(255,255,255,.10);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,.35);
  transition:transform .4s var(--ease-out), background .4s, border-color .4s;
}
.film__play svg{ margin-left:8px; }
.film__play-ring{
  position:absolute; inset:-1px; border-radius:50%;
  border:1px solid rgba(255,255,255,.4);
  animation:ringPulse 2.6s ease-out infinite;
}
@keyframes ringPulse{
  0%{ transform:scale(1); opacity:.8; }
  70%,100%{ transform:scale(1.55); opacity:0; }
}
.film__frame:hover .film__play{
  transform:translate(-50%,-50%) scale(1.08);
  background:rgba(61,123,253,.28);
  border-color:rgba(122,163,255,.7);
}
.film__caption{
  position:absolute; z-index:3; left:28px; bottom:22px;
  font-size:13px; letter-spacing:.14em; color:#000000;
}
.film__caption span{
  font-family:var(--font-en);
  font-size:10px; letter-spacing:.3em;
  color:#000000; margin-left:14px;
}
.film__frame.is-playing{ cursor:default; }
.film__frame.is-playing .film__poster,
.film__frame.is-playing .film__vignette,
.film__frame.is-playing .film__play,
.film__frame.is-playing .film__caption{ display:none; }
.film__frame video{ position:absolute; inset:0; width:100%; height:100%; background:#000; }
.film__missing{
  position:absolute; inset:0; z-index:5;
  display:grid; place-items:center;
  background:rgba(0,0,0,.82);
  font-size:14px; letter-spacing:.06em;
  color:rgba(255,255,255,.75);
  text-align:center; padding:20px; line-height:2.2;
}
.film__missing b{ color:#fff; font-weight:500; }
/* 帧外装饰块容器（参考图版式：左右侧文字挂在视频框上） */
.film__stage{ position:relative; z-index:2; max-width:1100px; margin:0 auto; }
.film__side-l{
  position:absolute; left:-214px; top:34%;
  transform:translateY(-50%); text-align:left; z-index:1;
}
.film__side-l .s-en{
  font-family:var(--font-en);
  font-size:16px; letter-spacing:.5em; line-height:27px;
}
.film__side-l .s-en1{ color:#000000; }
.film__side-l .s-en2{ color:#000000; }
.film__side-l .s-cn{ font-size:17px; color:#000000; line-height:27px; }
/* 左侧水印块：文字块上方淡蓝竖线（33px，参照效果图）；底部淡蓝横线（长=「创造」半 20px） */
.sl-vline{ display:block; width:2px; height:33px; background:#93C5FD; margin:0 0 24px; }
.sl-hline{ display:block; width:20px; height:2px; background:#93C5FD; margin-top:10px; }
.film__side-r-tags{
  position:absolute; right:-228px; top:-122px;
  transform:translateY(-50%); text-align:right; z-index:1;
  font-size:17px; color:#000000; line-height:27px;
}
/* 右上块末行下淡蓝横线（长=「未来」35px）；右下块末行下淡蓝横线（长=「OW」18px） */
.film__side-r-tags::after{
  content:""; display:block; width:35px; height:2px;
  background:#93C5FD; margin:8px 0 0 auto;
}
.film__side-r-en{
  position:absolute; right:-224px; top:58.7%;
  transform:translateY(-50%); text-align:right; z-index:1;
  font-family:var(--font-en);
  font-size:16px; letter-spacing:.15em; color:#000000; line-height:27px;
}
.film__side-r-en::after{
  content:""; display:block; width:18px; height:2px;
  background:#93C5FD; margin:8px 0 0 auto;
}
.film__features{
  position:relative; z-index:2;
  display:grid; grid-template-columns:repeat(4,1fr); gap:24px;
  max-width:1100px; margin:40px auto 0;
}
.film__ff{ display:flex; align-items:center; gap:16px; padding:0 12px; text-align:left; }
.film__ff-icon{
  flex:0 0 46px;
  width:46px; height:46px; border-radius:50%;
  background:#fff;
  box-shadow:0 4px 14px rgba(37,99,235,0.15);
  display:flex; align-items:center; justify-content:center; color:#3A78C1;
}
.film__ff-txt{ min-width:0; }
.film__ff h4{ font-size:19px; color:#031129; margin-bottom:8px; letter-spacing:.04em; }
.film__ff p{ font-size:13px; color:#000000; letter-spacing:.2em; }
/* 落款行：文字两侧同色长线条，总宽与上方四张特性卡一致（1100px 内） */
.film__foot{
  position:relative; z-index:2;
  display:flex; align-items:center; justify-content:center; gap:28px;
  max-width:1100px; margin:48px auto 0;
}
.film__foot-line{ flex:1; height:1px; background:#A3ABBA; opacity:.85; }
.film__foot-txt{
  margin:0; font-size:12px; letter-spacing:1.3em; padding-left:1.3em;
  color:#000000; white-space:nowrap;
}
/* 落款英文翻译小字 */
.film__foot-en{
  position:relative; z-index:2; margin-top:12px;
  font-family:var(--font-en);
  font-size:11px; letter-spacing:.3em; color:#000000;
}
/* 窄屏隐藏帧外左右装饰块（与参考图一致仅宽屏展示） */
@media (max-width:1549px){
  .film__side-l, .film__side-r-tags, .film__side-r-en{ display:none; }
  .film__eyebrow-top{ left:0; }
}
/* 窄屏隐藏标题左侧英文块（避免与居中标题重叠） */
@media (max-width:767px){
  .film__eyebrow-top{ display:none; }
}

/* ============================================================
   SECTION 5 · 探索杭可（配图卡片 + 实时 3D 场景）
   ============================================================ */
.explore{
  position:relative;
  padding:80px 60px 40px;
  background:
    radial-gradient(1200px 600px at 85% -10%, rgba(191,219,254,.5), transparent 60%),
    linear-gradient(180deg, #EAF2FB 0%, #F4F8FE 50%, #EAF2FB 100%);
  overflow:hidden;
}
.explore__curves{ position:absolute; inset:0; width:100%; height:100%; pointer-events:none; opacity:.7; }
.explore__orb{
  position:absolute; top:-180px; right:-120px;
  width:620px; height:620px; border-radius:50%;
  background:radial-gradient(circle at 35% 35%, rgba(255,255,255,.9), rgba(191,219,254,.35) 45%, rgba(147,197,253,.15) 70%, transparent 75%);
  box-shadow:inset 0 0 80px rgba(147,197,253,.25);
  pointer-events:none;
}
.explore__orb::before{
  content:""; position:absolute; inset:60px; border-radius:50%;
  border:1px dashed rgba(96,165,250,.35);
}
.explore__orb::after{
  content:""; position:absolute; inset:110px; border-radius:50%;
  border:1px solid rgba(96,165,250,.2);
}

.explore__head{
  position:relative; z-index:2;
  display:flex; justify-content:space-between; align-items:flex-start;
  width:83.333%; margin:0 auto 48px;
}
.explore__head-left .eyebrow{
  display:inline-flex; align-items:center; gap:14px;
  font-size:13px; letter-spacing:.35em; color:#000000; margin-bottom:14px;
}
.explore__head-left .eyebrow::before{ content:""; width:36px; height:2px; background:#60A5FA; }
.explore__title{
  font-family:var(--font-display);
  font-size:clamp(40px, 4.2vw, 64px);
  font-weight:900; letter-spacing:.1em;
  margin-bottom:14px;
}
.explore__slogan{ font-size:17px; letter-spacing:.55em; color:#000000; }
.explore__head-right{ text-align:right; padding-top:8px; }
.explore__head-right p{
  font-size:14px; line-height:1.9; letter-spacing:.35em; color:#000000;
}
.explore__head-right .line{
  display:inline-block; width:40px; height:2px; background:#60A5FA; margin-top:14px;
}
.explore__foot{
  position:relative; z-index:2;
  display:flex; justify-content:space-between; align-items:center;
  width:83.333%; margin:56px auto 0; padding-top:24px;
  font-family:var(--font-en);
  font-size:12px; letter-spacing:.3em; color:#000000;
}
.explore__foot-right{ display:flex; align-items:center; gap:16px; }
.explore__foot-right::before{ content:""; width:40px; height:2px; background:#60A5FA; }

.cards{ position:relative; z-index:2; display:flex; flex-direction:column; gap:22px;
  width:83.333%; margin:0 auto; }
.row2{ display:grid; grid-template-columns:1fr 1fr; gap:22px; }
.row3{ display:grid; grid-template-columns:repeat(3, 1fr); gap:22px; }

/* —— 卡片：左文字 2/3 + 右 3D 场景区 1/3 等高；悬停=原首页效果 —— */
.card{
  position:relative;
  display:flex; flex-direction:row; align-items:stretch;
  min-height:210px;
  padding:32px 36px 36px;
  border:1px solid rgba(255,255,255,.75);
  border-radius:20px;
  background:rgba(255,255,255,.85);
  box-shadow:0 8px 24px rgba(30,80,160,.06);
  overflow:hidden;
  transition:transform .9s var(--ease-out), box-shadow .5s var(--ease-out),
             border-color .5s;
}
.row2 .card{ min-height:230px; }
.card::before{
  content:""; position:absolute; left:0; right:0; top:0; height:1px; z-index:3;
  background:linear-gradient(90deg, transparent, rgba(61,123,253,.85), transparent);
  transform:translateX(-100%);
  transition:transform .9s var(--ease-out);
}
.card:hover{
  transform:translateY(-7px);
  border-color:rgba(61,123,253,.35);
  box-shadow:
    0 30px 70px rgba(23,32,44,.12),
    0 0 0 1px rgba(61,123,253,.10),
    0 0 60px rgba(61,123,253,.10),
    inset 0 1px 0 rgba(255,255,255,.95);
}
.card:hover::before{ transform:translateX(100%); }

.card__text{
  flex:0 0 66.666%; min-width:0;
  display:flex; flex-direction:column; justify-content:flex-start;
}
/* 中间三张卡（row3）：3D 区占 2/5，文字占 3/5 */
.row3 .card__text{ flex:0 0 60%; }
.card__en{
  font-size:12px; font-weight:500; letter-spacing:.3em;
  color:#000000; margin-bottom:18px;
}
.card__title{
  font-size:28px; font-weight:700; letter-spacing:.02em;
  color:#0F2347; margin-bottom:14px;
}
.card__desc{
  font-size:14.5px; line-height:1.75;
  color:#000000; max-width:380px;
}

/* —— 右侧 3D 场景区（1/3 宽、与文字等高；canvas 为 WebGL 实时场景，img 为无 WebGL 降级）—— */
.card__art{
  position:relative;
  flex:0 0 33.333%;
  z-index:1;
  display:flex; align-items:center; justify-content:center;
  pointer-events:none;
}
.row3 .card__art{ flex:0 0 40%; }
.card__watermark{
  position:absolute; left:-95px; top:16px; z-index:2;
  font-family:var(--font-en);
  font-size:10px; letter-spacing:.2em; color:#000000;
  line-height:1.5; text-transform:uppercase; white-space:nowrap;
  pointer-events:none;
}
.card__art img{
  width:min(150px, 74%); max-height:100%; height:auto;
  object-fit:contain;
  opacity:0; transform:translateY(50px) scale(.8);
  transition:opacity .9s ease, transform .9s cubic-bezier(.2,.8,.2,1);
  filter:drop-shadow(0 8px 16px rgba(59,130,246,.18));
}
.card[data-reveal].is-in .card__art img{
  opacity:1; transform:translateY(0) scale(1);
  animation:floatY 4.5s ease-in-out .9s infinite;
}
.card__fx{
  display:none;
  position:absolute; inset:0;
  width:100%; height:100%;
  opacity:.85;
  transition:opacity .6s var(--ease-out);
}
.card.fx-on .card__art img{ display:none; }
.card.fx-on .card__fx{ display:block; }
.card:hover .card__fx{ opacity:1; }
/* 斜向高光流光扫过（hover 触发一次） */
.card__art::after{
  content:""; position:absolute; top:-20%; bottom:-20%; left:0; z-index:3;
  width:45%;
  background:linear-gradient(105deg, transparent, rgba(255,255,255,.7), transparent);
  transform:translateX(-160%) skewX(-20deg);
  opacity:0;
  pointer-events:none;
}
.card:hover .card__art::after{
  opacity:1;
  animation:shine .9s ease;
}
@keyframes shine{
  from{ transform:translateX(-160%) skewX(-20deg); }
  to{ transform:translateX(360%) skewX(-20deg); }
}
@keyframes floatY{
  0%,100%{ transform:translateY(0); }
  50%{ transform:translateY(-7px); }
}

/* —— 圆形箭头（原首页悬停：变蓝 + 右上移 + 蓝投影）—— */
.card__arrow{
  position:absolute; right:24px; bottom:22px; z-index:4;
  width:46px; height:46px; border-radius:50%;
  background:#fff;
  box-shadow:0 4px 14px rgba(37,99,235,.18);
  display:flex; align-items:center; justify-content:center;
  color:#2563EB;
  transition:background .4s var(--ease-out), color .4s, transform .4s var(--ease-out), box-shadow .4s;
}
.card:hover .card__arrow{
  background:var(--blue); color:#fff;
  transform:translate(3px,-3px);
  box-shadow:0 8px 24px rgba(61,123,253,.4);
}

/* ---------------- 电影颗粒 ---------------- */
.grain{
  position:fixed; inset:-50%;
  z-index:999; pointer-events:none; opacity:.032;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)'/%3E%3C/svg%3E");
  animation:grainShift 1.1s steps(4) infinite;
}
@keyframes grainShift{
  0%{ transform:translate(0,0); }
  25%{ transform:translate(-2%,1.6%); }
  50%{ transform:translate(1.4%,-1.8%); }
  75%{ transform:translate(-1.2%,-1%); }
  100%{ transform:translate(0,0); }
}

/* ============================================================
   首屏完整版视频弹层
   ============================================================ */
.hero-video-modal{
  position:fixed; inset:0; z-index:120;
  display:grid; place-items:center;
  padding:clamp(18px, 4vw, 56px);
  opacity:0; visibility:hidden; pointer-events:none;
  transition:opacity .28s ease, visibility .28s ease;
}
.hero-video-modal.is-open{ opacity:1; visibility:visible; pointer-events:auto; }
.hero-video-modal__backdrop{
  position:absolute; inset:0;
  background:rgba(5,9,14,.76);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
}
.hero-video-modal__dialog{
  position:relative; z-index:1;
  width:min(1180px, 92vw);
  border:1px solid rgba(255,255,255,.14);
  border-radius:14px; overflow:hidden;
  background:#05080c;
  box-shadow:0 36px 90px rgba(0,0,0,.45);
  transform:translateY(10px) scale(.988);
  transition:transform .28s ease;
}
.hero-video-modal.is-open .hero-video-modal__dialog{ transform:none; }
.hero-video-modal__stage{ position:relative; aspect-ratio:16/9; background:#000; }
.hero-video-modal__stage video{ position:absolute; inset:0; width:100%; height:100%; object-fit:contain; background:#000; }
.hero-video-modal__close{
  position:absolute; top:12px; right:12px; z-index:3;
  width:38px; height:38px; display:grid; place-items:center;
  border:1px solid rgba(255,255,255,.24); border-radius:50%;
  background:rgba(5,9,14,.46); color:#fff;
  font-size:24px; line-height:1; cursor:pointer;
  -webkit-backdrop-filter:blur(8px); backdrop-filter:blur(8px);
  transition:background .2s ease, transform .2s ease;
}
.hero-video-modal__close:hover{ background:rgba(5,9,14,.76); transform:rotate(4deg); }
.hero-video-modal__missing{
  position:absolute; inset:0; display:grid; place-items:center;
  padding:30px; text-align:center; color:rgba(255,255,255,.7);
  font-size:13px; line-height:1.9;
}
body.is-video-modal-open{ overflow:hidden; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1080px){
  .explore{ padding:60px 32px 30px; }
  .cards{ width:100%; }
  .explore__head{ width:100%; }
  .explore__foot{ width:100%; }
  .explore__title{ font-size:42px; }
  .row2{ grid-template-columns:1fr; }
  .row3{ grid-template-columns:1fr 1fr; }

  .film{ padding:60px 32px; }
  .film__features{ grid-template-columns:repeat(2, 1fr); }
  .film__ff:nth-child(2){ border-right:none; }

  .data__grid{ grid-template-columns:repeat(2, 1fr); }
  .stat{ border-left:0; border-top:1px solid var(--line); padding:30px 18px 26px; }
  .stat:nth-child(-n+2){ border-top:0; }
  .stat:nth-child(even){ border-left:1px solid var(--line); }
}

@media (max-width:820px){
  .nav__links{ display:none; }
  .nav{ gap:16px; }
  .nav__cta{ margin-left:auto; }
  .brandmark__mark{ width:110px; height:31px; }
  #logoCanvas{ width:110px; height:31px; }
  .brandmark__cn{ font-size:15px; letter-spacing:.16em; }
  .brandmark__txt{ padding-left:8px; }

  .instruments{ height:auto; }
  .instruments__pin{ position:static; height:auto; min-height:0; overflow:visible; }
  .instruments__inner{ grid-template-columns:1fr; gap:34px; padding:0 6vw; }
  .instruments__frame{ margin-right:22px; margin-top:0; }
  .instruments__content{ opacity:1; transform:none; margin-top:0; }
  .instruments__features{ margin-top:30px; }

  .hero__full-video{ right:6vw; bottom:104px; }

  .film__play{ width:66px; height:66px; }
  .film__play svg{ width:40px; height:40px; }

  .explore__head{ flex-direction:column; gap:20px; }
  .explore__head-right{ text-align:left; }
}

@media (max-width:560px){
  .data__grid{ grid-template-columns:1fr; }
  .stat{ border-left:0 !important; border-top:1px solid var(--line); }
  .stat:first-child{ border-top:0; }
  .row3{ grid-template-columns:1fr; }
  .card{ padding:26px 20px 30px; }
  .card__title{ font-size:22px; }
  .card__art img{ width:min(108px, 80%); }
  .hero__sub-divider{ width:24px; margin:0 10px; }
  .hero__full-video{ right:18px; bottom:88px; padding-right:10px; }
  .hero__full-video-en,.hero__full-video-arrow{ display:none; }
  .hero__full-video-copy{ min-width:0; }
  .brandmark__txt{ display:none; }
}

/* ============================================================
   降低动态效果偏好
   ============================================================ */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *,*::before,*::after{
    animation-duration:.001s !important;
    animation-iteration-count:1 !important;
    transition-duration:.001s !important;
  }
  .load-seq,[data-reveal]{ opacity:1 !important; transform:none !important; }
  .ink{ -webkit-clip-path:none !important; clip-path:none !important; }
  .instruments__visual img{ transition:none; }
  .grain{ display:none; }
}

a:focus-visible, button:focus-visible{
  outline:2px solid var(--blue);
  outline-offset:3px;
  border-radius:4px;
}

/* ========================================================================== 
   v50 · 首页语言下拉（与内页 common.js 使用同一 DOM / 行为）
   ========================================================================== */
.home-lang-slot { flex: 0 0 auto; }
.home-language-dropdown { position: relative; z-index: 1200; }
.home-language-dropdown .language-dropdown__trigger {
  height: 36px;
  min-width: 96px;
  padding: 0 11px 0 13px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: 1px solid rgba(16,21,27,.22);
  border-radius: 999px;
  background: rgba(255,255,255,.55);
  color: #000000;
  font: 600 12px/1 "Space Grotesk","Noto Sans SC",sans-serif;
  letter-spacing: .02em;
  white-space: nowrap;
  cursor: pointer;
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  transition: background .2s ease,border-color .2s ease,color .2s ease;
}
.home-language-dropdown .language-dropdown__trigger i {
  font-style: normal;
  font-size: 11px;
  opacity: .72;
  transition: transform .2s ease;
}
.home-language-dropdown.is-open .language-dropdown__trigger i { transform: rotate(180deg); }
.nav.is-solid .home-language-dropdown .language-dropdown__trigger {
  color: var(--ink);
  border-color: rgba(16,21,27,.22);
  background: rgba(255,255,255,.72);
}
.home-language-dropdown .language-dropdown__menu {
  position: absolute;
  top: calc(100% + 9px);
  right: 0;
  width: 228px;
  padding: 7px;
  border: 1px solid #dfe6ec;
  border-radius: 10px;
  background: #fff;
  color: #2e475d;
  box-shadow: 0 18px 44px rgba(9,28,45,.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-5px);
  transition: opacity .18s ease, transform .18s ease, visibility .18s;
}
.home-language-dropdown.is-open .language-dropdown__menu { opacity:1; visibility:visible; transform:translateY(0); }
.home-language-dropdown .language-dropdown__item {
  width: 100%; min-height: 48px; padding: 8px 10px;
  display:grid; grid-template-columns:1fr auto; grid-template-rows:auto auto;
  align-items:center; column-gap:8px; border:0; border-radius:7px;
  background:transparent; color:#2e475d; text-align:left; cursor:pointer;
  text-decoration:none; font-family:inherit;
}
.home-language-dropdown .language-dropdown__item + .language-dropdown__item { margin-top:2px; }
.home-language-dropdown .language-dropdown__item span { grid-column:1; font-size:13px; font-weight:600; }
.home-language-dropdown .language-dropdown__item small { grid-column:1; color:#8a99a6; font-size:10px; margin-top:2px; }
.home-language-dropdown .language-dropdown__item b { grid-column:2; grid-row:1 / 3; color:#2d76a8; font-size:12px; }
.home-language-dropdown .language-dropdown__item:hover { background:#f1f6fa; color:#155d98; }
.home-language-dropdown .language-dropdown__item.is-current { background:#edf5fb; color:#155d98; }
html[lang="en"] .hero__full-video-en { display:none; }

@media (max-width: 1000px) {
  .nav { gap: 12px; }
  .home-language-dropdown .language-dropdown__trigger { min-width: 88px; height: 34px; font-size: 11px; }
}
@media (max-width: 760px) {
  .nav__links { display:none; }
  .nav__cta { margin-left:auto; padding:8px 14px; font-size:11px; }
  .home-language-dropdown .language-dropdown__trigger { min-width:78px; height:32px; padding:0 8px; font-size:10px; }
  .home-language-dropdown .language-dropdown__menu { width:min(220px, calc(100vw - 28px)); right:-10px; }
}
@media (max-width: 430px) {
  .nav__cta { padding:7px 10px; letter-spacing:.06em; }
  .home-language-dropdown .language-dropdown__trigger { min-width:72px; }
}

/* ===== 英文页修正（2026-09-12 批次7）：探索/宣传片/仪器区 EN 排版与文案样式 ===== */
/* ③ 第3行小卡：英文页模型图裁剪空白后显示在卡片右上角，标题 24px 一行 */
html[lang="en"] .row3 .card__text{ flex-basis:100%; }
html[lang="en"] .row3 .card__title{ white-space:nowrap; font-size:24px; }
html[lang="en"] .row3 .card__art{ position:absolute; top:14px; right:14px; flex:none; width:164.594px; z-index:2; overflow:hidden; }
html[lang="en"] .row3 .card:nth-child(1) .card__art{ height:140px; }
html[lang="en"] .row3 .card:nth-child(2) .card__art{ height:140px; }
html[lang="en"] .row3 .card:nth-child(3) .card__art{ height:140px; }
html[lang="en"] .row3 .card__art img{ width:100%; height:100%; max-height:none; }
html[lang="en"] .row3 .card:nth-child(1) .card__art img{ object-fit:cover; object-position:53% 49%; }
html[lang="en"] .row3 .card:nth-child(2) .card__art img{ object-fit:contain; }
html[lang="en"] .row3 .card:nth-child(3) .card__art img{ object-fit:cover; object-position:52% 50%; }
html[lang="en"] .row3 .card[data-reveal].is-in .card__art img{ animation:none; }
/* ② 探索 slogan 英文：收紧字距正常排版 */
html[lang="en"] .explore__slogan{ letter-spacing:.06em; line-height:1.7; }
/* 探索标题右侧竖排英文：收紧字距 */
html[lang="en"] .explore__head-right p{ letter-spacing:.15em; }
/* 宣传片副标题英文：收紧字距 */
html[lang="en"] .film__sub{ letter-spacing:.12em; }
/* ⑤ 页脚：英文进两条线之间，隐藏线条下方英文 */
html[lang="en"] .film__foot-txt{ font-family:var(--font-en); font-size:11px; letter-spacing:.3em; padding-left:.3em; }
html[lang="en"] .film__foot-en{ display:none; }
/* 宣传片 4 行特性英文：标题一行、副行收紧字距 */
html[lang="en"] .film__ff h4{ font-size:16px; letter-spacing:0; }
html[lang="en"] .film__ff p{ letter-spacing:.08em; }
/* 仪器 3 图标英文：标题一行 */
html[lang="en"] .instruments__features .feature h4{ font-size:14px; }
/* 仪器英文标题与下方英文间距：20px → 40px */
html[lang="en"] .instruments__title{ margin-bottom:40px; }
/* 首屏英文大标题与副标题间距：48px → 72px */
html[lang="en"] .hero__sub{ margin-top:46px; }
/* 英文大标题 g/y 下延部超出墨块盒子会被 background-clip:text 裁掉：
   padding-bottom 撑大墨块盒子，下延部完整落在背景绘制区内（2026-09-13） */
html[lang="en"] .hero__title .ink{ padding-bottom:.25em; }
html[lang="en"] .instruments__title .ink{ padding-bottom:.22em; }