/* ==========================================================================
   字体：Inter（拉丁正文/标题）+ JetBrains Mono（数字与英文小标签）
   两者均为 SIL OFL 1.1，可免费商用；文件已本地托管，不依赖 Google Fonts。
   许可原文见 assets/fonts/OFL-*.txt
   ========================================================================== */
@font-face{
  font-family:"Inter";
  font-style:normal;
  font-weight:100 900;
  font-display:swap;
  src:url("fonts/inter-latin-var.woff2") format("woff2-variations"),
      url("fonts/inter-latin-var.woff2") format("woff2");
  unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,
                U+0304,U+0308,U+0329,U+2000-206F,U+2074,U+20AC,U+2122,
                U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD;
}
@font-face{
  font-family:"JetBrains Mono";
  font-style:normal;
  font-weight:400;
  font-display:swap;
  src:url("fonts/jbmono-latin-400.woff2") format("woff2");
  unicode-range:U+0000-00FF,U+2000-206F,U+20AC,U+2122;
}
@font-face{
  font-family:"JetBrains Mono";
  font-style:normal;
  font-weight:500;
  font-display:swap;
  src:url("fonts/jbmono-latin-500.woff2") format("woff2");
  unicode-range:U+0000-00FF,U+2000-206F,U+20AC,U+2122;
}
/* ==========================================================================
   千恩电商 · 站点样式
   基调：影棚黑场 + 品牌红（#FF2A2A）+ 实拍摄影 + 编辑式排版
   ========================================================================== */

:root{
  color-scheme: dark;
  --bg:#060607;
  --bg-2:#0a0a0c;
  --bg-3:#0e0e11;
  --ink:#f4f4f5;
  --ink-2:#b6b6bc;
  --muted:#7d7d85;
  --muted-2:#9c9ca4;
  --red:#ff2a2a;
  --red-2:#c8102e;
  --line:rgba(255,255,255,.085);
  --line-2:rgba(255,255,255,.16);
  --maxw:1240px;
  --pad:clamp(20px,4.4vw,44px);
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --sans:"Inter","HarmonyOS Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei UI","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,"SFMono-Regular",Consolas,"Liberation Mono",monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img,svg,video{display:block;max-width:100%}
button{font:inherit;color:inherit}
::selection{background:var(--red);color:#fff}
:focus-visible{outline:2px solid var(--red);outline-offset:3px}
[hidden]{display:none !important}

/* 胶片颗粒：让暗场不"塑料" */
body::after{
  content:"";position:fixed;left:0;top:0;right:0;bottom:0;z-index:80;pointer-events:none;opacity:.028;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
}

.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:var(--pad)}
.sec{position:relative;padding:clamp(76px,10vw,140px) 0}
section[id]{scroll-margin-top:84px}

.label{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:11px;font-weight:500;
  letter-spacing:.24em;text-transform:uppercase;color:var(--muted);
}
.label::before{content:"";width:18px;height:1px;background:var(--red);flex:0 0 auto}
.label b{color:var(--ink);font-weight:500}

.h1{font-size:2.6rem;font-size:clamp(2.5rem,6vw,5.1rem);line-height:1.04;letter-spacing:-.04em;font-weight:800;text-wrap:balance}
.h1 em{font-style:normal;color:var(--red)}
.h2{font-size:1.95rem;font-size:clamp(1.85rem,3.8vw,3.1rem);line-height:1.16;letter-spacing:-.03em;font-weight:800;text-wrap:balance}
.h3{font-size:1.12rem;font-size:clamp(1.08rem,1.55vw,1.28rem);line-height:1.4;letter-spacing:-.015em;font-weight:700}
.lead{font-size:1rem;font-size:clamp(.98rem,1.15vw,1.06rem);color:var(--ink-2);line-height:1.85}
.mono{font-family:var(--mono);font-size:11px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted)}

.sec-head{
  display:grid;grid-template-columns:1fr minmax(0,26rem);
  gap:clamp(24px,4vw,64px);align-items:end;
  padding-bottom:clamp(30px,4vw,52px);
}
.sec-head .label{margin-bottom:20px}
.sec-head p{padding-bottom:6px}

.btn{
  --h:52px;
  display:inline-flex;align-items:center;justify-content:center;gap:12px;
  height:var(--h);padding:0 26px;border-radius:2px;
  border:1px solid transparent;background:none;cursor:pointer;
  font-size:.94rem;font-weight:700;letter-spacing:.02em;white-space:nowrap;
  transition:background .3s var(--ease),color .3s var(--ease),border-color .3s var(--ease),transform .3s var(--ease);
}
.btn--solid{background:var(--red);color:#fff}
.btn--solid:hover{background:#ff4545;transform:translateY(-2px)}
.btn--ghost{border-color:var(--line-2);color:var(--ink)}
.btn--ghost:hover{border-color:#fff;background:rgba(255,255,255,.06);transform:translateY(-2px)}
.btn__ar{transition:transform .35s var(--ease)}
.btn:hover .btn__ar{transform:translateX(5px)}
.btn--block{width:100%}
.nav__cta{--h:42px;padding:0 20px;font-size:.86rem}

.skip{
  position:absolute;left:16px;top:-80px;z-index:99;
  padding:10px 18px;background:var(--bg-3);border:1px solid var(--line-2);
  transition:top .2s;
}
.skip:focus{top:12px}

/* ---------- 头部 ---------- */
.site-head{
  position:fixed;top:0;left:0;right:0;z-index:60;
  border-bottom:1px solid transparent;
  transition:background .45s var(--ease),border-color .45s,backdrop-filter .45s;
}
.site-head.is-stuck{
  background:rgba(6,6,7,.82);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
}
.nav{display:flex;align-items:center;gap:clamp(12px,3.4vw,48px);height:76px;min-width:0}
.brand{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.brand img{width:32px;height:32px;object-fit:contain}
.brand__cn{font-size:1.02rem;font-weight:800;letter-spacing:.06em;line-height:1.1}
.brand__en{display:block;font-family:var(--mono);font-size:9px;letter-spacing:.3em;color:var(--muted);line-height:1.6}
.nav__links{display:flex;align-items:center;gap:clamp(16px,2.4vw,36px);margin-left:auto}
.nav__links a{position:relative;font-size:.9rem;color:var(--ink-2);padding:8px 0;transition:color .25s}
.nav__links a::after{
  content:"";position:absolute;left:0;right:0;bottom:2px;height:1px;
  background:var(--red);transform:scaleX(0);transform-origin:left;
  transition:transform .35s var(--ease-out);
}
.nav__links a:hover{color:#fff}
.nav__links a:hover::after{transform:scaleX(1)}
.nav__right{display:flex;align-items:center;gap:12px;flex:0 0 auto;min-width:0}
.lang{display:flex;align-items:center;gap:6px;font-family:var(--mono);font-size:11px;letter-spacing:.1em}
.lang span{color:var(--muted)}
.lang b{color:var(--ink);font-weight:500}
.burger{
  display:none;width:44px;height:44px;flex:0 0 auto;
  border:1px solid var(--line-2);background:none;cursor:pointer;position:relative;
}
.burger i{position:absolute;left:12px;right:12px;height:1px;background:var(--ink);transition:transform .35s var(--ease),opacity .2s}
.burger i:nth-child(1){top:17px}
.burger i:nth-child(2){top:22px}
.burger i:nth-child(3){top:27px}
.burger[aria-expanded="true"] i:nth-child(1){transform:translateY(5px) rotate(45deg)}
.burger[aria-expanded="true"] i:nth-child(2){opacity:0}
.burger[aria-expanded="true"] i:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

.mnav{
  position:fixed;inset:76px 0 auto 0;z-index:55;display:none;
  flex-direction:column;height:calc(100dvh - 76px);overflow-y:auto;
  padding:12px var(--pad) 40px;
  background:rgba(6,6,7,.98);
  -webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);
  border-bottom:1px solid var(--line);
}
.mnav[data-open="true"]{display:flex}
.mnav a{
  display:flex;align-items:baseline;gap:14px;
  padding:20px 0;font-size:1.18rem;font-weight:700;letter-spacing:-.01em;
  border-bottom:1px solid var(--line);
}
.mnav a span{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--red)}
.mnav .btn{margin-top:28px}

/* 移动端语言切换（桌面端在导航右侧，窄屏收起后由这里承接） */
.mnav__lang{
  display:flex;align-items:center;gap:7px;
  margin-top:22px;padding-top:20px;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:var(--muted);
}
.mnav__lang span{margin-right:6px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted)}
.mnav__lang b{font-weight:500;color:var(--red)}
.mnav__lang a{
  padding:0;border:0;font-size:11px;letter-spacing:.14em;
  color:var(--ink-2);border-bottom:1px solid var(--line-2);
  transition:color .25s,border-color .25s;
}
.mnav__lang a:hover{color:#fff;border-bottom-color:var(--red)}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;min-height:100vh;min-height:100svh;
  display:flex;flex-direction:column;justify-content:flex-end;
  overflow:hidden;
}
.hero__media{position:absolute;left:0;top:0;right:0;bottom:0;z-index:0}
.hero__inner{position:relative;z-index:2}
.hero__side{z-index:1}
.hero__media img{
  width:100%;height:100%;object-fit:cover;object-position:center 42%;
  filter:grayscale(.32) contrast(1.14) brightness(.62) saturate(1.05);
  animation:kenburns 26s ease-in-out infinite alternate;
  will-change:transform;
}
@keyframes kenburns{from{transform:scale(1)}to{transform:scale(1.07)}}
.hero__media::after{
  content:"";position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(6,6,7,.86) 0%,rgba(6,6,7,.18) 34%,rgba(6,6,7,.55) 68%,var(--bg) 100%),
    linear-gradient(94deg,rgba(6,6,7,.9) 0%,rgba(6,6,7,.42) 46%,rgba(6,6,7,.1) 100%),
    radial-gradient(62% 55% at 12% 92%,rgba(255,42,42,.2),transparent 72%),
    radial-gradient(120% 95% at 68% 42%,transparent 32%,rgba(6,6,7,.62) 100%);
}
.hero__inner{position:relative;width:100%;padding-top:140px;padding-bottom:clamp(44px,6vw,76px)}
.hero__label{margin-bottom:clamp(24px,3.4vw,40px)}
.hero h1{margin-bottom:clamp(22px,2.6vw,32px)}
.hero__line{display:block}
.hero__sub{max-width:44ch;color:var(--ink-2);font-size:clamp(.98rem,1.2vw,1.08rem);line-height:1.85}
.hero__cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:clamp(28px,3.4vw,40px)}

.rail-band{border-bottom:1px solid var(--line);background:var(--bg);padding-bottom:6px}
.rail{
  position:relative;
  display:grid;grid-template-columns:repeat(4,1fr);
}
.rail__i{padding:24px 0 6px;position:relative}
.rail__i + .rail__i{padding-left:clamp(16px,2.4vw,32px)}
.rail__i + .rail__i::before{content:"";position:absolute;left:0;top:24px;bottom:8px;width:1px;background:var(--line)}
.rail__v{display:block;font-size:clamp(1.5rem,2.6vw,2.15rem);font-weight:800;letter-spacing:-.03em;line-height:1.1;font-variant-numeric:tabular-nums}
.rail__v em{font-style:normal;color:var(--red)}
.rail__k{display:block;margin-top:8px;font-size:.8rem;color:var(--muted);letter-spacing:.02em}

.hero__side{
  position:absolute;right:calc(var(--pad) * .55);top:50%;
  transform:translateY(-50%) rotate(180deg);writing-mode:vertical-rl;
  font-family:var(--mono);font-size:10px;letter-spacing:.34em;
  color:rgba(255,255,255,.34);text-transform:uppercase;display:none;
}

/* ---------- 跑马灯 ---------- */
.marquee{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg-2);overflow:hidden;padding:16px 0;-webkit-mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent);mask-image:linear-gradient(90deg,transparent,#000 7%,#000 93%,transparent)}
.marquee__track{display:flex;width:max-content;animation:slide 48s linear infinite}
.marquee:hover .marquee__track{animation-play-state:paused}
.marquee__half{display:flex;align-items:center;gap:34px;padding-right:34px}
.marquee__half span{font-family:var(--mono);font-size:11px;letter-spacing:.24em;text-transform:uppercase;color:var(--ink-2);white-space:nowrap}
.marquee__half i{width:5px;height:5px;background:var(--red);flex:0 0 auto;transform:rotate(45deg)}
@keyframes slide{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- 01 业务生态 ---------- */
.svc-list{border-top:1px solid var(--line)}
.svc-row{
  position:relative;display:grid;
  grid-template-columns:72px minmax(0,300px) minmax(0,1fr) 32px;
  gap:clamp(14px,2vw,32px);align-items:center;
  padding:clamp(22px,2.6vw,32px) 0;
  border-bottom:1px solid var(--line);
  transition:background .4s var(--ease),padding .4s var(--ease);
}
.svc-row::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:2px;
  background:var(--red);transform:scaleY(0);transform-origin:top;
  transition:transform .45s var(--ease-out);
}
.svc-row:hover{background:rgba(255,255,255,.022);padding-left:clamp(10px,1.4vw,20px)}
.svc-row:hover::before{transform:scaleY(1)}
.svc-idx{font-family:var(--mono);font-size:12px;letter-spacing:.18em;color:var(--muted);transition:color .35s}
.svc-row:hover .svc-idx{color:var(--red)}
.svc-name{transition:transform .45s var(--ease-out)}
.svc-row:hover .svc-name{transform:translateX(4px)}
.svc-desc{font-size:.9rem;color:var(--muted-2);line-height:1.8}
.svc-ar{color:var(--muted);transition:transform .4s var(--ease),color .3s}
.svc-row:hover .svc-ar{transform:translateX(6px);color:var(--red)}

/* 英文版：业务行标题列加宽，避免折行 */
html[lang="en"] .svc-row{grid-template-columns:72px minmax(0,380px) minmax(0,1fr) 32px}
html[lang="en"] .sec-head{grid-template-columns:1fr minmax(0,30rem)}
html[lang="en"] .h1{font-size:clamp(2.2rem,5.2vw,4.5rem)}


@keyframes blink{0%,100%{opacity:1}50%{opacity:.2}}

/* ---------- 02 服务流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(18px,2.4vw,34px)}
.flow__i{position:relative;padding-top:26px;border-top:1px solid var(--line);transition:border-color .4s}
.flow__i:hover{border-top-color:var(--red)}
.flow__n{
  position:absolute;right:0;top:-6px;
  font-size:clamp(3.4rem,6vw,5.4rem);font-weight:800;line-height:1;
  letter-spacing:-.05em;color:rgba(255,255,255,.062);
  pointer-events:none;user-select:none;
}
.flow__step{display:block;font-family:var(--mono);font-size:10px;letter-spacing:.24em;color:var(--red);margin-bottom:14px}
.flow__i h3{margin-bottom:10px}
.flow__i p{font-size:.89rem;color:var(--muted-2);line-height:1.8;max-width:26ch}

/* ---------- 03 品牌自播 ---------- */
.live{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:clamp(30px,5vw,72px);align-items:center}
.live__copy .label{margin-bottom:22px}
.live__copy h2{margin-bottom:20px}
.live__copy p{max-width:40ch;margin-bottom:32px}
.live__media{position:relative;overflow:hidden;background:var(--bg-2);aspect-ratio:4/5}
.live__media img{width:100%;height:100%;object-fit:cover;object-position:28% 45%;filter:grayscale(.32) brightness(.56) contrast(1.12);transition:transform 1.2s var(--ease-out)}
.live__media:hover img{transform:scale(1.04)}
.live__media::after{
  content:"";position:absolute;left:0;top:0;right:0;bottom:0;z-index:1;pointer-events:none;
  background:linear-gradient(200deg,rgba(96,10,18,.2) 0%,rgba(6,6,7,.3) 100%);
}
.live__badge{z-index:3;
  position:absolute;top:18px;left:18px;
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;background:rgba(6,6,7,.72);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.16);
  font-family:var(--mono);font-size:10px;letter-spacing:.22em;color:#fff;
}
.live__badge::before{content:"";width:6px;height:6px;background:var(--red);animation:blink 1.8s var(--ease) infinite}
.live__strip{z-index:3;
  position:absolute;left:0;right:0;bottom:0;display:flex;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.14);
  background:rgba(6,6,7,.72);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
}
.live__strip div{flex:1 1 0;min-width:110px;padding:14px 16px;font-size:.78rem;color:var(--ink-2);letter-spacing:.04em}
.live__strip div + div{border-left:1px solid rgba(255,255,255,.12)}

/* ---------- 04 合作案例（纯版式卡片，不出现平台界面与直播数据） ---------- */
.cases{display:grid;grid-template-columns:1fr 1fr;gap:clamp(14px,1.7vw,22px)}
.case{position:relative}
.case__poster{
  position:relative;display:flex;flex-direction:column;overflow:hidden;
  aspect-ratio:16/11;padding:clamp(22px,2.6vw,34px);
  border:1px solid var(--line);
  background:
    radial-gradient(130% 110% at 100% 0%,rgba(255,42,42,.085),transparent 58%),
    linear-gradient(160deg,#0c0c0f 0%,#08080a 100%);
  transition:border-color .45s var(--ease),transform .5s var(--ease-out);
}
.case__poster::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:0;
  background-image:
    linear-gradient(to right,rgba(255,255,255,.05) 1px,transparent 1px),
    linear-gradient(to bottom,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(120% 95% at 100% 0%,#000 10%,transparent 72%);
  mask-image:radial-gradient(120% 95% at 100% 0%,#000 10%,transparent 72%);
  transition:opacity .5s var(--ease);
}
.case:hover .case__poster{border-color:rgba(255,42,42,.5);transform:translateY(-4px)}
.case:hover .case__poster::before{opacity:1}
.case__num{
  position:absolute;right:clamp(18px,2.4vw,32px);top:clamp(12px,1.8vw,22px);
  font-size:clamp(2.6rem,4.4vw,4rem);font-weight:800;line-height:1;
  letter-spacing:-.05em;color:rgba(255,255,255,.07);
  transition:color .45s var(--ease);
}
.case:hover .case__num{color:rgba(255,42,42,.3)}
.case__cat{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--red);text-transform:uppercase}
.case__store{
  margin-top:auto;font-size:clamp(1.2rem,2.1vw,1.7rem);line-height:1.24;
  font-weight:800;letter-spacing:-.02em;
}
.case__store small{display:block;margin-top:8px;font-size:.58em;font-weight:600;letter-spacing:.01em;color:var(--ink-2)}
.case__scope{
  display:flex;align-items:center;gap:12px;margin-top:clamp(16px,2vw,24px);
  padding-top:clamp(14px,1.8vw,20px);border-top:1px solid var(--line);
  font-size:.79rem;color:var(--muted-2);letter-spacing:.02em;
}
.case__scope::before{content:"";width:20px;height:1px;background:var(--red);flex:0 0 auto}
/* ---------- 合作品牌 ---------- */
.partners{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line)}
.partner{display:flex;gap:clamp(14px,2vw,26px);padding:clamp(24px,3vw,36px) clamp(16px,2vw,28px) clamp(24px,3vw,36px) 0;border-bottom:1px solid var(--line)}
.partner:nth-child(odd){border-right:1px solid var(--line);padding-right:clamp(20px,3vw,44px)}
.partner:nth-child(even){padding-left:clamp(20px,3vw,44px)}
.partner__i{font-family:var(--mono);font-size:10px;letter-spacing:.2em;color:var(--muted);padding-top:4px;flex:0 0 auto}
.partner p{font-size:.95rem;color:var(--ink-2);line-height:1.8;max-width:32ch}

/* ---------- 05 为什么选择千恩 ---------- */
.why{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line)}
.why__i{padding:clamp(26px,3.4vw,44px) clamp(18px,2.4vw,32px) clamp(26px,3.4vw,44px) 0}
.why__i + .why__i{border-left:1px solid var(--line);padding-left:clamp(20px,2.8vw,40px)}
.why__v{display:block;font-size:clamp(2rem,3.6vw,3rem);font-weight:800;letter-spacing:-.04em;line-height:1.1;margin-bottom:12px;font-variant-numeric:tabular-nums}
.why__v em{font-style:normal;color:var(--red)}
.why__i p{font-size:.9rem;color:var(--muted-2);line-height:1.8;max-width:26ch}

/* ---------- 06 联系 ---------- */
.contact{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.02fr);gap:clamp(34px,5vw,80px);align-items:start}
.contact__copy .label{margin-bottom:22px}
.contact__copy h2{margin-bottom:18px}
.contact__copy > p{max-width:38ch;margin-bottom:clamp(28px,4vw,44px)}
.info{display:grid;gap:26px;border-top:1px solid var(--line);padding-top:28px}
.info__row{display:grid;grid-template-columns:96px 1fr;gap:16px;align-items:start}
.info__k{font-family:var(--mono);font-size:10px;letter-spacing:.18em;color:var(--muted);padding-top:5px}
.info__v{font-size:.94rem;color:var(--ink);line-height:1.75}
.info__v a{border-bottom:1px solid var(--line-2);transition:border-color .3s,color .3s}
.info__v a:hover{color:var(--red);border-bottom-color:var(--red)}
.info__v small{display:block;font-size:.8rem;color:var(--muted);margin-top:2px}

.form{position:relative;border:1px solid rgba(255,255,255,.11);background:linear-gradient(180deg,rgba(255,255,255,.028),rgba(255,255,255,.006));padding:clamp(24px,3.2vw,40px)}
.form__title{font-family:var(--mono);font-size:10px;letter-spacing:.24em;color:var(--muted);text-transform:uppercase;padding-bottom:18px;margin-bottom:22px;border-bottom:1px solid var(--line)}
.fields{display:grid;gap:18px}
.field{display:grid;gap:8px}
.field label{font-size:.78rem;letter-spacing:.08em;color:var(--ink-2);font-weight:600}
.field label i{font-style:normal;color:var(--red);margin-left:3px}
.field input,.field textarea{
  width:100%;padding:12px 0;background:transparent;border:0;border-bottom:1px solid var(--line-2);
  color:var(--ink);font:inherit;font-size:.95rem;border-radius:0;transition:border-color .3s;
}
.field input::placeholder,.field textarea::placeholder{color:#5a5a61}
.field input:focus,.field textarea:focus{outline:none;border-bottom-color:var(--red)}
.field textarea{min-height:76px;resize:vertical}
.form .btn{margin-top:26px}
.form__note{margin-top:16px;font-size:.74rem;color:var(--muted);line-height:1.7}
.form-sent .fields,.form-sent .form__note,.form-sent .btn,.form-sent .form__title{display:none}
.form-ok{display:none;padding:26px 0 6px;text-align:center;outline:none}
.form-ok:focus,.form-ok:focus-visible{outline:none}
.form.form-sent{display:flex;align-items:center;justify-content:center;min-height:320px}
.form-ok__mail{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:18px}
.form-ok__mail a{font-size:1rem;font-weight:700;letter-spacing:.01em;border-bottom:1px solid var(--red);padding-bottom:2px}
.copy-btn{
  font-family:var(--mono);font-size:10px;letter-spacing:.14em;cursor:pointer;
  padding:7px 12px;background:none;border:1px solid var(--line-2);color:var(--ink-2);
  transition:border-color .25s,color .25s;
}
.copy-btn:hover{border-color:var(--red);color:#fff}
.form-ok::before{content:"";display:block;width:34px;height:2px;background:var(--red);margin:0 auto 22px}
.form-ok b{display:block;font-size:1.02rem;margin-bottom:8px}
.form-ok span{font-size:.86rem;color:var(--muted);line-height:1.7}
.form-sent .form-ok{display:block}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--line);padding:clamp(44px,6vw,72px) 0 28px;background:var(--bg-2)}
.footer__top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:clamp(24px,4vw,48px);padding-bottom:clamp(30px,4vw,48px)}
.footer__brand p{margin-top:18px;font-size:.86rem;color:var(--muted);line-height:1.85;max-width:34ch}
.footer h4{font-family:var(--mono);font-size:10px;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);margin-bottom:18px;font-weight:500}
.footer__links{display:grid;gap:11px}
.footer__links a,.footer__links span{font-size:.88rem;color:var(--ink-2);transition:color .25s}
.footer__links a:hover{color:var(--red)}
.footer__bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  padding-top:24px;border-top:1px solid var(--line);
  font-size:.76rem;color:var(--muted);letter-spacing:.02em;
}
.footer__bottom .links{display:flex;gap:18px;flex-wrap:wrap}
.footer__bottom a:hover{color:var(--ink)}

.to-top{
  position:fixed;right:var(--pad);bottom:28px;z-index:50;
  width:44px;height:44px;display:grid;place-items:center;
  background:rgba(10,10,12,.86);border:1px solid var(--line-2);color:var(--ink);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .35s,visibility .35s,transform .35s,background .3s,border-color .3s;
}
.to-top.is-on{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--red);border-color:var(--red)}

/* ---------- 响应式 ---------- */
@media (min-width:1100px){.hero__side{display:block}}
@media (max-width:1080px){
  .svc-row{grid-template-columns:56px minmax(0,240px) minmax(0,1fr) 30px}
    .flow{grid-template-columns:1fr 1fr;gap:clamp(22px,3vw,38px)}
  .live{grid-template-columns:1fr;gap:38px}
  .live__media img{aspect-ratio:16/10}
  .cases{grid-template-columns:1fr 1fr}
  .contact{grid-template-columns:1fr;gap:44px}
  .footer__top{grid-template-columns:1fr 1fr}
  .sec-head{grid-template-columns:1fr}
  .sec-head p{max-width:52ch}
}
@media (max-width:880px){
  .nav__links,.lang{display:none}
  .burger{display:block}
  .nav__right{margin-left:auto}
  .rail{grid-template-columns:1fr 1fr}
  .rail__i{padding:20px 0 4px}
  .rail__i:nth-child(3){padding-left:0}
  .rail__i:nth-child(3)::before{display:none}
  .rail__i:nth-child(3),.rail__i:nth-child(4){border-top:1px solid var(--line);margin-top:8px;padding-top:20px}
  .partners{grid-template-columns:1fr}
  .partner:nth-child(odd){border-right:0;padding-right:0}
  .partner:nth-child(even){padding-left:0}
  .why{grid-template-columns:1fr}
  .why__i + .why__i{border-left:0;border-top:1px solid var(--line);padding-left:0}
  .hero__inner{padding-top:120px}
}
@media (max-width:640px){
  .svc-row{grid-template-columns:32px minmax(0,1fr);gap:8px 14px;align-items:start}
  .svc-idx{grid-row:1}
  .svc-desc{grid-column:2}
  .svc-ar{display:none}
  .flow{grid-template-columns:1fr}
  .cases{grid-template-columns:1fr}
  .case__poster{aspect-ratio:16/10}
  .hero__cta .btn{width:100%}
  .footer__top{grid-template-columns:1fr}
  .info__row{grid-template-columns:1fr;gap:4px}
  .info__k{padding-top:0}
}

/* ---------- 动效 / 降级 ---------- */
.js [data-reveal]{opacity:0;transform:translateY(22px)}
.js [data-reveal].in{
  opacity:1;transform:none;
  transition:opacity .9s var(--ease-out),transform .9s var(--ease-out);
  transition-delay:var(--d,0s);
}
.js [data-wipe]{clip-path:inset(0 0 100% 0)}
.js [data-wipe].in{
  clip-path:inset(0 0 0 0);
  transition:clip-path 1.1s var(--ease-out);
  transition-delay:var(--d,0s);
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .js [data-reveal]{opacity:1;transform:none}
  .js [data-wipe]{clip-path:none}
  .marquee__track{animation:none}
}

/* ==========================================================================
   文档页（隐私政策 / 版权声明）
   ========================================================================== */
.doc{padding:calc(76px + clamp(34px,5vw,64px)) 0 clamp(56px,8vw,96px)}
.doc__wrap{max-width:820px}
.doc__head{border-bottom:1px solid var(--line);padding-bottom:clamp(22px,3vw,34px);margin-bottom:clamp(26px,3.4vw,42px)}
.doc__head h1{font-size:clamp(1.7rem,3.4vw,2.6rem);line-height:1.2;letter-spacing:-.03em;font-weight:800;margin-top:18px}
.doc__meta{font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--muted);margin-top:16px}
.doc__nav{display:flex;gap:22px;flex-wrap:wrap;margin-top:26px}
.doc__nav a{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--ink-2);border-bottom:1px solid var(--line-2);padding-bottom:4px;transition:color .25s,border-color .25s}
.doc__nav a:hover{color:var(--red);border-color:var(--red)}
.doc section + section{margin-top:clamp(40px,6vw,68px);padding-top:clamp(30px,4vw,48px);border-top:1px solid var(--line)}
.doc h2{font-size:clamp(1.35rem,2.4vw,1.85rem);line-height:1.28;letter-spacing:-.02em;font-weight:800;margin-bottom:8px}
.doc h3{font-size:1rem;font-weight:700;margin:clamp(22px,2.6vw,30px) 0 8px;letter-spacing:-.01em}
.doc h3:first-of-type{margin-top:18px}
.doc p,.doc li{font-size:.92rem;color:var(--ink-2);line-height:1.95}
.doc p + p{margin-top:10px}
.doc ol,.doc ul{display:grid;gap:7px;padding-left:1.25em;margin-top:10px}
.doc ol{list-style:decimal}
.doc ul{list-style:disc}
.doc li::marker{color:var(--red)}
.doc a.link{color:var(--ink);border-bottom:1px solid var(--line-2);transition:color .25s,border-color .25s}
.doc a.link:hover{color:var(--red);border-color:var(--red)}
.doc__note{margin-top:clamp(30px,4vw,44px);padding:18px 20px;border-left:2px solid var(--red);background:rgba(255,255,255,.025);font-size:.86rem;color:var(--muted-2);line-height:1.9}
/* ==========================================================================
   兜底与窄屏修正
   ========================================================================== */
@supports not (aspect-ratio: 1 / 1){
  .case__poster{min-height:240px}
  .live__media{min-height:340px}
}

/* 窄屏：品牌副标收起，咨询按钮缩一档，保证汉堡始终在屏幕内 */
@media (max-width:520px){
  .label{letter-spacing:.14em;font-size:10px}
  .brand{min-width:0}
  .brand__cn{white-space:nowrap}
  .brand__en{display:none}
  .nav{gap:10px}
  .nav__right{gap:10px}
  .nav__cta{--h:38px;padding:0 13px;font-size:.8rem}
}
@media (max-width:360px){
  .label{letter-spacing:.1em;font-size:9px}
  .nav__cta{padding:0 10px;font-size:.76rem}
  .brand img{width:28px;height:28px}
  .brand__cn{font-size:.94rem}
}
/* 法务页没有汉堡菜单，语言切换在窄屏常驻 */
@media (max-width:880px){
  .doc-page .lang{display:flex}
  .doc-page .nav__cta{--h:38px;padding:0 13px;font-size:.8rem}
}
/* ==========================================================================
   运营中枢 · 模块介绍（首页 07）
   ========================================================================== */
.hubt{
  display:grid;grid-template-columns:1fr 1.08fr;
  gap:clamp(28px,4.4vw,64px);align-items:center;
}
.hubt__copy .h2{margin-top:20px}
.hubt__copy .lead{margin-top:18px}
.hubt__list{
  list-style:none;margin:24px 0 28px;
  display:grid;gap:13px;
}
.hubt__list li{
  position:relative;padding-left:16px;
  font-size:.92rem;line-height:1.65;color:var(--muted);
}
.hubt__list li::before{
  content:"";position:absolute;left:0;top:.62em;
  width:6px;height:1px;background:var(--red);
}
.hubt__list b{
  display:inline-block;min-width:8.2em;padding-right:.7em;
  color:var(--ink);font-weight:600;
}
.hubt__list li{padding-left:18px}
.hubt__media{
  position:relative;display:block;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
  background:#0b0b12;
  transition:border-color .4s var(--ease),transform .5s var(--ease-out);
}
.hubt__media:hover{border-color:rgba(255,42,42,.34);transform:translateY(-3px)}
.hubt__media img{display:block;width:100%;height:auto}
.hubt__badge{
  position:absolute;left:14px;top:14px;
  display:inline-flex;align-items:center;gap:7px;
  padding:5px 11px;border-radius:999px;
  background:rgba(10,10,16,.78);border:1px solid rgba(255,42,42,.34);
  backdrop-filter:blur(8px);
  font-family:var(--mono);font-size:10px;letter-spacing:.1em;color:#ff8a8a;
}
.hubt__badge::before{
  content:"";width:5px;height:5px;border-radius:50%;background:var(--red);
  box-shadow:0 0 0 3px rgba(255,42,42,.18);
}
.hubt__go{
  position:absolute;right:14px;bottom:14px;
  display:inline-flex;align-items:center;gap:7px;
  padding:8px 14px;border-radius:999px;
  background:rgba(255,42,42,.9);color:#fff;
  font-size:.78rem;font-weight:600;
  opacity:0;transform:translateY(6px);
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.hubt__media:hover .hubt__go{opacity:1;transform:none}

@media (max-width:880px){
  .hubt{grid-template-columns:1fr;gap:26px}
  .hubt__list b{min-width:0;display:block;margin-bottom:2px}
  .hubt__go{opacity:1;transform:none}
}