/* =========================================================
   其壹数科 · 视觉设计系统 v2
   暗色 · 霓虹渐变 · 玻璃拟态 · 动效
   对标 AI 制作大厂（Runway / Kling / Pika）
   ========================================================= */

:root{
  --bg:#060912;
  --bg-2:#0a1020;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(255,255,255,.07);
  --border:rgba(255,255,255,.10);
  --border-strong:rgba(255,255,255,.18);
  --text:#eaf0ff;
  --muted:#9aa6c4;
  --muted-2:#6b7796;
  --brand:#4f8cff;
  --cyan:#2fe6e0;
  --violet:#8b5cf6;
  --mag:#ff5ca8;
  --grad:linear-gradient(120deg,#4f8cff 0%,#2fe6e0 50%,#8b5cf6 100%);
  --grad-warm:linear-gradient(120deg,#ff5ca8 0%,#8b5cf6 60%,#4f8cff 100%);
  --glow:0 0 40px rgba(79,140,255,.35);
  --radius:18px;
  --radius-lg:26px;
  --maxw:1200px;
  --nav-h:68px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Segoe UI",system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  color:var(--text);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
  position:relative;
}
/* 极光背景 */
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(60vw 60vw at 12% -8%,rgba(79,140,255,.20),transparent 60%),
    radial-gradient(55vw 55vw at 92% 8%,rgba(139,92,246,.18),transparent 60%),
    radial-gradient(50vw 50vw at 70% 100%,rgba(47,230,224,.12),transparent 60%),
    var(--bg);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.025) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000,transparent 80%);
          mask-image:radial-gradient(circle at 50% 30%,#000,transparent 80%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer}

.wrap{width:min(var(--maxw),92vw);margin:0 auto}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ===================== NAV ===================== */
.nav{
  position:sticky;top:0;z-index:50;height:var(--nav-h);
  display:flex;align-items:center;
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s,backdrop-filter .3s;
}
.nav.scrolled{
  background:rgba(8,12,22,.72);
  backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--border);
}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;width:min(var(--maxw),94vw)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.5px}
/* 1OF Logo：导航栏用青色版(品牌主色)，页脚用白色版 */
.logo-img{height:32px;width:auto;object-fit:contain;vertical-align:middle;border-radius:0}
.logo-nav{height:34px}
.logo-foot{height:26px}
.menu{display:flex;gap:26px}
.menu a{color:var(--muted);font-size:14.5px;font-weight:500;position:relative;transition:color .25s}
.menu a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--grad);transition:width .25s}
.menu a:hover{color:#fff}
.menu a:hover::after,.menu a.active::after{width:100%}
.menu a.active{color:#fff}
.lang{display:flex;gap:6px;align-items:center}
.lang button{
  background:var(--surface);border:1px solid var(--border);color:var(--muted);
  padding:6px 11px;border-radius:9px;font-size:12.5px;font-weight:600;transition:.2s;
}
.lang button.active{color:#fff;border-color:transparent;background:var(--grad);box-shadow:var(--glow)}
.lang button:hover{color:#fff}

/* 汉堡菜单按钮（桌面隐藏，移动端显示） */
.nav-toggle{display:none;width:42px;height:42px;border-radius:11px;background:var(--surface);border:1px solid var(--border);flex-direction:column;gap:5px;align-items:center;justify-content:center;padding:0;margin-left:14px}
.nav-toggle span{display:block;width:20px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.nav.open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav.open .nav-toggle span:nth-child(2){opacity:0}
.nav.open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===================== HERO / CAROUSEL ===================== */
.hero-carousel{position:relative;height:min(86vh,720px);height:min(86dvh,720px);min-height:520px;overflow:hidden}
.slide{
  position:absolute;inset:0;opacity:0;visibility:hidden;
  transition:opacity .9s ease,transform .9s ease;transform:scale(1.04);
  display:flex;align-items:flex-end;
}
.slide.active{opacity:1;visibility:visible;transform:scale(1)}
.slide .bg{position:absolute;inset:0;z-index:0}
.slide .bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(6,9,18,.25) 0%,rgba(6,9,18,.55) 55%,rgba(6,9,18,.96) 100%)}
/* 轮播视频背景：默认透明（回落到渐变），加载成功后淡入；位于渐变之上、文字之下 */
.slide .slide-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;opacity:0;transition:opacity .8s ease}
.slide .slide-video.ready{opacity:1}
.slide .veil{position:absolute;inset:0;z-index:1;background:
  radial-gradient(40vw 40vw at 80% 20%,rgba(255,255,255,.10),transparent 60%),
  radial-gradient(50vw 50vw at 10% 90%,rgba(0,0,0,.45),transparent 60%);}
.slide .content{position:relative;z-index:2;width:min(var(--maxw),92vw);margin:0 auto;height:100%;justify-content:flex-start;padding:14vh 0 12vh;display:flex;flex-direction:column;align-items:flex-start;gap:22px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:700;letter-spacing:3px;
  text-transform:uppercase;color:var(--cyan);margin-bottom:18px;
  padding:7px 14px;border:1px solid var(--border);border-radius:999px;background:var(--surface);
}
/* 标语防错行：中文/对照模式整句不拆字，EN模式允许整体换行防溢出 */
.slogan-keep{white-space:nowrap;font-weight:600}
html:not([lang="en"]) .slogan-keep{white-space:nowrap}
html[lang="en"] .slogan-keep{white-space:normal;overflow-wrap:break-word}
.slide h1{
  font-size:clamp(34px,6vw,76px);line-height:1.12;font-weight:900;letter-spacing:-1px;
  max-width:100%;margin-bottom:0;text-shadow:0 4px 40px rgba(0,0,0,.5);
  white-space:normal;overflow-wrap:break-word;
}
/* 中文/中英对照模式：大标题强制单行（避免 CJK 字符间断行）；英文模式允许换行防止超宽裁切 */
html:not([lang="en"]) .slide h1{white-space:nowrap}
/* PC 端（≥861px）：大标题下方的正文强制单行完整显示，避免错行/被裁切；平板与手机自动换行 */
@media(min-width:861px){
  html:not([lang="en"]) .slide .lead{white-space:nowrap}
}
.slide .lead{font-size:clamp(15px,1.6vw,20px);line-height:1.7;color:#d7deef;max-width:none;margin-bottom:0;min-height:auto}
.slide .meta-row{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-top:auto}
  .slide .eyebrow{margin-bottom:0}
  /* 中英对照模式：英文以弱化小字附于中文之下（紧凑UI元素内联显示） */
  .en-cmp{display:block;font-size:.72em;line-height:1.45;font-weight:400;opacity:.5;margin-top:.35em;letter-spacing:0;color:#aeb8d0}
  .nav a .en-cmp,.btn .en-cmp,.eyebrow .en-cmp,.tag .en-cmp,.num .en-cmp,.slide-tag .en-cmp{display:inline-block;font-size:.62em;margin:0 0 0 .5em;opacity:.6;vertical-align:baseline}
  /* 对照模式下，轮播大标题与正文保持统一行高节奏 */
  .slide h1 .en-cmp{margin-top:.25em;line-height:1.3}
  .slide .lead .en-cmp{margin-top:.3em}

/* slide 专属渐变背景（5 类） */
.bg-1{background:radial-gradient(60% 80% at 75% 25%,#5b3df0 0%,#241a5e 45%,#0a0e22 100%)}
.bg-2{background:radial-gradient(60% 80% at 70% 30%,#0a7bd6 0%,#0a2a55 45%,#060a18 100%)}
.bg-3{background:radial-gradient(60% 80% at 78% 22%,#ff4d8d 0%,#7a1f5a 45%,#0a0a1e 100%)}
.bg-4{background:radial-gradient(60% 80% at 72% 28%,#0fb5a8 0%,#0a4a52 45%,#06121a 100%)}
.bg-5{background:radial-gradient(60% 80% at 76% 24%,#f0a93d 0%,#7a4a12 45%,#0e0a14 100%)}

/* 悬浮装饰：动态光斑 */
.orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.55;z-index:1;animation:float 9s ease-in-out infinite}
@keyframes float{0%,100%{transform:translateY(0) translateX(0)}50%{transform:translateY(-26px) translateX(14px)}}

/* carousel 控件 */
.car-btn{
  position:absolute;top:50%;transform:translateY(-50%);z-index:5;
  width:52px;height:52px;border-radius:50%;display:grid;place-items:center;
  background:rgba(10,14,26,.5);border:1px solid var(--border-strong);color:#fff;
  font-size:20px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);transition:.25s;
}
.car-btn:hover{background:var(--grad);box-shadow:var(--glow);transform:translateY(-50%) scale(1.08)}
.car-btn.prev{left:24px}.car-btn.next{right:24px}
.dots{position:absolute;bottom:30px;right:0;left:0;z-index:5;display:flex;gap:10px;justify-content:center}
.dots button{width:34px;height:5px;border-radius:999px;border:none;background:rgba(255,255,255,.22);transition:.3s;padding:0}
.dots button.active{width:54px;background:var(--grad);box-shadow:var(--glow)}
.car-progress{position:absolute;left:0;right:0;bottom:0;height:3px;background:rgba(255,255,255,.08);z-index:5}
.car-progress i{display:block;height:100%;width:0;background:var(--grad);box-shadow:var(--glow)}
/* 轮播声音开关 */
.car-mute{position:absolute;top:calc(var(--nav-h) + 58px);right:max(4vw,24px);z-index:6;
  width:46px;height:46px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  cursor:pointer;color:#fff;border:1px solid rgba(255,255,255,.18);
  background:rgba(12,16,28,.45);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  transition:.25s;box-shadow:0 4px 16px rgba(0,0,0,.35)}
.car-mute:hover{background:rgba(20,26,44,.7);transform:translateY(-2px)}
.car-mute svg{width:22px;height:22px;pointer-events:none}
.car-mute .ic-on{display:none}
.car-mute.on .ic-on{display:block}
.car-mute.on .ic-muted{display:none}
.slide-tag{position:absolute;top:calc(var(--nav-h) + 24px);right:max(4vw,24px);z-index:4;
  font-size:12px;letter-spacing:2px;color:var(--muted);text-transform:uppercase}

/* ===================== BUTTONS ===================== */
.btn{display:inline-flex;align-items:center;gap:9px;padding:13px 24px;border-radius:13px;font-weight:700;font-size:15px;transition:.25s;border:1px solid transparent}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--glow)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 0 60px rgba(79,140,255,.6)}
.btn-ghost{background:var(--surface);border-color:var(--border-strong);color:#fff}
.btn-ghost:hover{background:var(--surface-2);border-color:#fff}
.btn .arr{transition:transform .25s}.btn:hover .arr{transform:translateX(4px)}

/* ===================== SECTION ===================== */
.section{padding:clamp(64px,9vw,120px) 0;position:relative}
.section-head{text-align:center;max-width:760px;margin:0 auto 56px}
.section-head .eyebrow{margin-bottom:14px}
.section-head h2{font-size:clamp(28px,4vw,46px);font-weight:900;letter-spacing:-.5px;line-height:1.15}
.section-head p{color:var(--muted);margin-top:16px;font-size:16px}
.kicker{font-size:13px;font-weight:700;letter-spacing:3px;color:var(--cyan);text-transform:uppercase;margin-bottom:14px}

.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

/* 玻璃卡片 */
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:30px;position:relative;overflow:hidden;transition:transform .3s,border-color .3s,background .3s;
}
.card::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;
  background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .3s;pointer-events:none}
.card:hover{transform:translateY(-6px);background:var(--surface-2);border-color:transparent}
.card:hover::before{opacity:1}
.card h3{font-size:20px;font-weight:800;margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px}
.tag{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.5px;padding:5px 11px;border-radius:999px;
  background:rgba(79,140,255,.14);color:#9cc0ff;border:1px solid rgba(79,140,255,.25);margin-bottom:14px}

/* 通用图标徽标 */
.badge{width:56px;height:56px;border-radius:16px;display:grid;place-items:center;font-size:24px;font-weight:800;color:#fff;background:var(--grad);box-shadow:var(--glow);flex:0 0 56px}

/* ===================== 业务入口 ===================== */
.biz{padding:18px 22px;display:flex;flex-direction:column;gap:10px;min-height:200px}
.biz .num{font-size:13px;color:var(--muted-2);font-weight:700;letter-spacing:2px}
.biz h3{font-size:22px}
.biz .ico{width:46px;height:46px;border-radius:13px;display:grid;place-items:center;background:var(--grad);font-size:22px;box-shadow:var(--glow)}
.biz ul{list-style:none;margin-top:6px;display:flex;flex-direction:column;gap:7px}
.biz li{color:var(--muted);font-size:14px;display:flex;gap:9px;align-items:flex-start}
.biz li::before{content:"▹";color:var(--cyan);font-weight:900}

/* ===================== 能力预览 ===================== */
.cap-pill{display:flex;align-items:center;gap:16px;padding:22px 24px;border-radius:var(--radius)}
.cap-pill .ci{width:54px;height:54px;flex:0 0 54px;border-radius:15px;display:grid;place-items:center;font-size:24px;background:var(--surface-2);border:1px solid var(--border)}
.cap-pill h4{font-size:17px;font-weight:800}
.cap-pill p{font-size:13.5px;color:var(--muted)}

/* ===================== CTA BAND ===================== */
.cta-band{
  position:relative;border-radius:var(--radius-lg);padding:clamp(40px,6vw,72px);text-align:center;overflow:hidden;
  background:linear-gradient(120deg,rgba(79,140,255,.16),rgba(139,92,246,.14),rgba(47,230,224,.12));
  border:1px solid var(--border-strong);
}
.cta-band h2{font-size:clamp(26px,4vw,44px);font-weight:900;margin-bottom:14px}
.cta-band p{color:#cdd6ee;margin-bottom:28px;font-size:16px}

/* ===================== 案例页 ===================== */
.case-block{margin-bottom:64px;scroll-margin-top:calc(var(--nav-h) + 20px)}
.case-block .head{display:flex;align-items:baseline;gap:16px;margin-bottom:26px;flex-wrap:wrap}
.case-block .head h3{font-size:clamp(22px,3vw,32px);font-weight:900}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.case-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .3s,border-color .3s}
.case-card:hover{transform:translateY(-6px);border-color:var(--border-strong)}
/* 案例视频播放卡片 */
.case-card .case-video{height:220px;position:relative;overflow:hidden;
  border-bottom:1px solid var(--border)}
.case-card .cv-poster{width:100%;height:100%;display:grid;place-items:center;
  cursor:pointer;transition:.35s}
.case-card .cv-poster:hover{filter:brightness(1.15);transform:scale(1.02)}
.cv-play{z-index:3;width:56px;height:56px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:rgba(47,230,224,.18);border:1.5px solid rgba(47,230,224,.55);
  color:#fff;cursor:pointer;transition:.25s;backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);box-shadow:0 4px 20px rgba(0,0,0,.4)}
.cv-play:hover{background:var(--grad);border-color:transparent;
  transform:scale(1.12);box-shadow:0 0 28px rgba(47,230,224,.45)}
.cv-play svg{width:24px;height:24px;margin-left:3px}
.cv-player{padding:0;background:#000}
.cv-player video{width:100%;height:auto;display:block}
.case-card .meta{padding:22px}
.case-card .meta h4{font-size:18px;font-weight:800;margin-bottom:8px}
.case-card .meta p{color:var(--muted);font-size:14px;margin-bottom:14px}
.soon{display:inline-block;font-size:12px;font-weight:700;color:var(--cyan);border:1px solid rgba(47,230,224,.3);padding:5px 12px;border-radius:999px;background:rgba(47,230,224,.08)}

/* ===================== 团队页 ===================== */
.team-hero{padding:calc(var(--nav-h) + 70px) 0 40px;text-align:center}
.team-hero h1{font-size:clamp(34px,6vw,64px);font-weight:900;letter-spacing:-1px}
.team-hero p{color:var(--muted);max-width:60ch;margin:18px auto 0;font-size:16px}
.member{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;
  display:grid;grid-template-columns:280px 1fr;transition:transform .3s,border-color .3s;
}
.member:hover{transform:translateY(-5px);border-color:var(--border-strong)}
.member .portrait{position:relative;min-height:320px;display:grid;place-items:center;
  background:radial-gradient(80% 90% at 50% 20%,rgba(79,140,255,.4),transparent 60%),linear-gradient(160deg,#0d1530,#0a0f20)}
.member .avatar{width:120px;height:120px;border-radius:30px;display:grid;place-items:center;font-size:42px;font-weight:900;color:#fff;background:var(--grad);box-shadow:var(--glow);z-index:1}
.member .portrait .scan{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:26px 26px;opacity:.5}
.member .body{padding:34px 36px}
.member .role{font-size:13px;font-weight:700;letter-spacing:1.5px;color:var(--cyan);text-transform:uppercase;margin-bottom:8px}
.member h3{font-size:28px;font-weight:900;margin-bottom:4px}
.member .title-cn{color:var(--muted);font-size:15px;margin-bottom:18px}
.member .bio{color:#cdd6ee;font-size:15px;margin-bottom:20px}
.member .skills{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:18px}
.member .skills span{font-size:12.5px;padding:6px 13px;border-radius:999px;background:var(--surface-2);border:1px solid var(--border);color:#cdd6ee}
.member .stat{display:flex;gap:26px;flex-wrap:wrap;padding-top:18px;border-top:1px solid var(--border)}
.member .stat div{font-size:13px;color:var(--muted)}
.member .stat b{display:block;font-size:24px;font-weight:900;color:#fff;margin-bottom:2px}
.member .quote{margin-top:18px;font-style:italic;color:var(--muted);border-left:3px solid var(--brand);padding-left:16px;font-size:14.5px}

/* ===================== 关于/通用 hero ===================== */
.page-hero{padding:calc(var(--nav-h) + 80px) 0 50px;position:relative}
.page-hero .eyebrow{margin-bottom:18px}
.page-hero h1{font-size:clamp(32px,5.5vw,60px);font-weight:900;letter-spacing:-1px;line-height:1.1;max-width:18ch}
.page-hero .lead{color:var(--muted);font-size:clamp(15px,1.7vw,19px);max-width:60ch;margin-top:22px}
.lead-lg{font-size:clamp(17px,2.2vw,24px);color:#d7deef;max-width:60ch;line-height:1.6}

/* ===================== 联系 ===================== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info .row{display:flex;gap:14px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--border)}
.contact-info .row .ic{width:44px;height:44px;flex:0 0 44px;border-radius:12px;display:grid;place-items:center;background:var(--surface-2);border:1px solid var(--border);font-size:20px}
.contact-info .row b{display:block;font-size:15px;margin-bottom:3px}
.contact-info .row span,.contact-info .row a{color:var(--muted);font-size:14.5px}
.form{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px}
.form label{display:block;font-size:13.5px;color:var(--muted);margin:0 0 8px;font-weight:600}
.form input,.form textarea,.form select{
  width:100%;background:rgba(0,0,0,.25);border:1px solid var(--border);border-radius:12px;
  padding:13px 15px;color:#fff;font-family:inherit;font-size:14.5px;margin-bottom:18px;transition:.2s;
}
.form input:focus,.form textarea:focus,.form select:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(79,140,255,.18)}
.form textarea{resize:vertical;min-height:120px}
.form .hint{font-size:12.5px;color:var(--muted-2);margin-top:-10px;margin-bottom:16px}
.note-box{background:rgba(47,230,224,.08);border:1px solid rgba(47,230,224,.25);border-radius:14px;padding:18px 20px;color:#bfeee9;font-size:14px;margin-bottom:22px}

/* ===================== 统计条 ===================== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;margin-top:10px}
.stat-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;text-align:center}
.stat-box b{display:block;font-size:clamp(30px,4vw,46px);font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-box span{color:var(--muted);font-size:14px}

/* ===================== 滚动渐显 ===================== */
/* 仅在 JS 启用(.js)时隐藏，避免脚本异常导致整页空白 */
.js .reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.js .reveal.in{opacity:1;transform:none}
.js .reveal.d1{transition-delay:.08s}.js .reveal.d2{transition-delay:.16s}.js .reveal.d3{transition-delay:.24s}.js .reveal.d4{transition-delay:.32s}

/* ===================== FOOTER ===================== */
.foot{border-top:1px solid var(--border);padding:60px 0 36px;margin-top:40px;background:rgba(6,9,18,.6)}
.foot .wrap{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px}
.foot h4{font-size:14px;margin-bottom:16px;color:#fff}
.foot a{display:block;color:var(--muted);font-size:14px;margin-bottom:10px;transition:color .2s}
.foot a:hover{color:#fff}
.foot .copy{grid-column:1/-1;margin-top:30px;padding-top:22px;border-top:1px solid var(--border);color:var(--muted-2);font-size:13px;text-align:center}
.foot .brand{color:#fff}
.foot .line{display:block;color:var(--muted);font-size:14px;margin-bottom:9px;line-height:1.6}
.foot a.line:hover{color:#fff}
/* ── 分享按钮 (首页) ── */
.share-fab{
  position:fixed;bottom:calc(28px + env(safe-area-inset-bottom));right:28px;z-index:999;
  width:52px;height:52px;border-radius:50%;
  border:none;background:var(--grad);box-shadow:var(--glow);
  color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;
  transition:transform .25s ease, box-shadow .25s ease;
  -webkit-tap-highlight-color:transparent;
}
.share-fab:hover{transform:scale(1.08);box-shadow:0 0 20px rgba(47,230,224,.5)}
.share-fab:active{transform:scale(.96)}
.share-fab svg{width:24px;height:24px;pointer-events:none}
/* 分享弹层 */
.share-mask{
  position:fixed;inset:0;z-index:1001;
  background:rgba(4,7,14,.72);
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
  display:flex;align-items:center;justify-content:center;padding:24px;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.share-mask.open{opacity:1;visibility:visible}
.share-card{
  position:relative;width:min(420px,92vw);
  background:linear-gradient(160deg,#0e1426,#161d33);
  border:1px solid rgba(47,230,224,.25);border-radius:20px;padding:22px;
  box-shadow:0 20px 60px rgba(0,0,0,.55),0 0 24px rgba(47,230,224,.12);
  transform:translateY(12px) scale(.98);transition:transform .25s cubic-bezier(.4,0,.2,1);
}
.share-mask.open .share-card{transform:none}
.share-close{position:absolute;top:10px;right:12px;width:32px;height:32px;border:none;background:transparent;color:var(--muted);font-size:24px;line-height:1;cursor:pointer;border-radius:8px}
.share-close:hover{color:#fff}
.share-preview{display:flex;gap:14px;align-items:center;padding-right:24px}
.share-thumb{width:96px;height:54px;border-radius:10px;object-fit:cover;flex:0 0 96px;border:1px solid rgba(255,255,255,.08)}
.share-title{font-size:16px;font-weight:800;color:#fff;line-height:1.3}
.share-desc{font-size:12.5px;color:var(--muted);margin-top:5px;line-height:1.5}
.share-url{font-size:11px;color:#6f7a93;margin-top:7px;word-break:break-all}
.share-actions{display:flex;gap:10px;margin-top:18px}
.share-act{flex:1;padding:11px 0;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:#fff;font-size:14px;cursor:pointer;transition:.2s;-webkit-tap-highlight-color:transparent}
.share-act:hover{background:var(--surface-2)}
.share-act.primary{background:var(--grad);border:none;box-shadow:var(--glow)}
.share-act[hidden]{display:none}
.share-qr{margin-top:16px;text-align:center;display:none}
.share-qr.show{display:block}
.share-qr img{width:160px;height:160px;border-radius:12px;background:#fff;padding:8px}
.share-qr p{font-size:12px;color:var(--muted);margin-top:8px;line-height:1.5}
.share-toast{
  position:fixed;top:-60px;left:50%;transform:translateX(-50%);
  background:linear-gradient(135deg,#111 0%,#1a1f35 100%);
  color:#fff;padding:10px 26px;border-radius:99px;
  font-size:14px;opacity:0;pointer-events:none;
  transition:top .35s cubic-bezier(.4,0,.2,1),opacity .35s ease;
  z-index:1002;
  border:1px solid rgba(47,230,224,.3);box-shadow:0 4px 16px rgba(0,0,0,.4),0 0 12px rgba(47,230,224,.15);
}
.share-toast.show{top:80px;opacity:1}

/* ===================== 响应式 ===================== */
@media(max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:repeat(2,1fr)}
  .member{grid-template-columns:1fr}
  .member .portrait{min-height:220px}
  .contact-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .foot .wrap{grid-template-columns:1fr 1fr}
}
/* 平板 / 手机：导航折叠为汉堡菜单（避免小屏菜单项拥挤 + 手机端完全不可见的问题） */
@media(max-width:860px){
  .nav .wrap{width:92vw}
  .nav-toggle{display:flex}
  .menu{
    display:none;position:absolute;left:0;right:0;top:var(--nav-h);
    flex-direction:column;gap:0;padding:6px 0 14px;
    background:rgba(8,12,22,.97);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
    border-bottom:1px solid var(--border);box-shadow:0 20px 40px rgba(0,0,0,.4);
  }
  .nav.open .menu{display:flex}
  .menu a{padding:15px 6vw;width:100%;border-bottom:1px solid rgba(255,255,255,.06);font-size:15px}
  .menu a::after{display:none}
  .menu a.active{color:#fff;background:var(--surface)}
  .lang{margin-left:auto}
}
@media(max-width:720px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .case-grid{grid-template-columns:1fr}
  .car-btn{width:42px;height:42px;font-size:16px}
  .car-btn.prev{left:10px}.car-btn.next{right:10px}
  .hero-carousel{height:auto;min-height:auto}
  .slide{position:relative;opacity:1;visibility:visible;transform:none;min-height:82vh;min-height:82dvh}
  .slide:not(.active){display:none}
  .slide h1{white-space:normal;font-size:clamp(27px,7vw,40px);line-height:1.14}
  .slide .content{padding:11vh 0 10vh}
  .slide .lead{min-height:auto;white-space:normal;overflow-wrap:anywhere}
  /* 窄屏：标语允许整体换行，但 CJK 字符不拆断（用 word-break 避免单字掉行） */
  .slogan-keep{white-space:normal;word-break:keep-all;overflow-wrap:anywhere}
  .card{padding:22px}
  .member .body{padding:26px 22px}
  .form{padding:24px}
  .foot .wrap{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .section{padding:clamp(50px,13vw,84px) 0}
  .team-hero{padding:calc(var(--nav-h) + 48px) 0 32px}
  .page-hero{padding:calc(var(--nav-h) + 46px) 0 40px}
  /* 移动端关闭 hero 自动播放视频，节省流量+避免卡顿 */
  .slide .slide-video{display:none!important}
  /* 案例卡 mobile 间距 */
  .case-card{margin-bottom:14px}
  .case-card .meta{padding:18px}
}

/* ===================== theme-qiyi-tech overrides ===================== */
.slide .bg{background:radial-gradient(120% 120% at 18% 18%,rgba(79,140,255,.28),transparent 55%),radial-gradient(100% 100% at 82% 88%,rgba(139,92,246,.22),transparent 55%),#060912}
.slide .orb{position:absolute;border-radius:50%;filter:blur(70px);opacity:.5;z-index:1;pointer-events:none}
.section{padding:96px 0}
.section-head{margin-bottom:48px;max-width:820px}
.section-head h2{font-size:clamp(26px,3.6vw,44px);font-weight:800;line-height:1.25;margin-bottom:16px}
.section-head p{color:var(--muted);font-size:16px}
.kicker{color:var(--cyan);letter-spacing:3px;font-size:13px;font-weight:700;text-transform:uppercase;margin-bottom:14px}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{border-radius:var(--radius);background:var(--surface);border:1px solid var(--border);padding:28px;transition:.3s}
.card:hover{border-color:var(--border-strong);transform:translateY(-4px);background:var(--surface-2)}
.card .ico{font-size:30px;display:block;margin-bottom:10px}
.card .num{color:var(--cyan);font-weight:800;letter-spacing:1px;font-size:13px}
.card h3{font-size:20px;margin:10px 0 8px;color:#fff}
.card p{color:var(--muted);font-size:14px}
.card li{list-style:none;color:var(--muted);font-size:14px;padding:4px 0}
.card li::before{content:"· ";color:var(--cyan)}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-box{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:28px;text-align:center}
.stat-box b{display:block;font-size:clamp(28px,3vw,42px);font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-box span{color:var(--muted);font-size:14px}
.team-card{text-align:center}
.team-card .avatar{width:96px;height:96px;border-radius:50%;object-fit:cover;margin:0 auto 14px;border:2px solid var(--border-strong)}
.team-card h3{font-size:18px;color:#fff;margin-bottom:2px}
.team-card .role{color:var(--cyan);font-size:13px;font-weight:600;margin-bottom:8px}
.team-card p{color:var(--muted);font-size:14px}
.case-card .cover{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;margin-bottom:14px}
.case-card .tag{display:inline-block;color:var(--cyan);font-size:12px;font-weight:600;letter-spacing:1px;margin-bottom:8px}
.case-card h3{font-size:18px;color:#fff;margin-bottom:6px}
.case-card p{color:var(--muted);font-size:14px}
.site-footer{margin-top:40px;padding:48px 0 32px;border-top:1px solid var(--border)}
.site-footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px;margin-bottom:28px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:12px}
.site-footer p,.site-footer a{color:var(--muted);font-size:14px;line-height:2.1}
.site-footer .beian{text-align:center;color:var(--muted-2);font-size:12.5px;border-top:1px solid var(--border);padding-top:20px}
.page-body{padding:56px 0 80px;min-height:60vh}
.page-body h1{font-size:clamp(30px,4vw,52px);font-weight:800;margin-bottom:24px}
.page-body h2{font-size:24px;font-weight:700;margin:28px 0 12px;color:#fff}
.page-body p{color:#d7deef;margin-bottom:14px}
.page-body ul,.page-body ol{padding-left:22px;color:#d7deef;margin-bottom:14px}
.page-body img{border-radius:var(--radius);margin:12px 0}
.page-body a{color:var(--cyan)}
.page-body blockquote{border-left:3px solid var(--cyan);padding-left:16px;color:var(--muted);margin:16px 0}
.cta-card h2{font-size:clamp(24px,3vw,36px);font-weight:800;margin-bottom:12px}
@media(max-width:860px){.grid-2,.grid-3,.stats{grid-template-columns:1fr}.menu{display:none}.nav.open .menu{display:flex;flex-direction:column;position:absolute;top:var(--nav-h);left:0;right:0;background:rgba(8,12,22,.96);padding:16px 6vw}.nav-toggle{display:flex}}