/* ===== 中芯领域 · 站点样式 ===== */
:root{
  --bg:#05080f; --bg2:#0a1020; --bg3:#070c18;
  --panel:rgba(255,255,255,.055); --panel2:rgba(255,255,255,.034); --panel3:rgba(255,255,255,.08);
  --line:rgba(255,255,255,.11); --line2:rgba(255,255,255,.2);
  --txt:#e9eefb; --dim:#93a1bd; --dim2:#6b7893;
  --accent:#22d3ee; --accent2:#7c6cf6; --accent3:#f472b6;
  --ok:#34d399; --warn:#fbbf24;
  --shadow:0 24px 70px -30px rgba(0,0,0,.85);
  --radius:18px;
}
html[data-theme="light"]{
  --bg:#f5f7fc; --bg2:#ffffff; --bg3:#eef2fa;
  --panel:rgba(13,25,55,.035); --panel2:rgba(13,25,55,.02); --panel3:rgba(13,25,55,.06);
  --line:rgba(13,25,55,.10); --line2:rgba(13,25,55,.18);
  --txt:#0b1428; --dim:#4a5872; --dim2:#78849e;
  --accent:#0891b2; --accent2:#6d43e0; --accent3:#db2777;
  --ok:#047857; --warn:#b45309;
  --shadow:0 20px 50px -26px rgba(13,25,55,.32);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:86px}
body{margin:0;background:var(--bg);color:var(--txt);line-height:1.65;padding-top:70px;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.4px}
p{margin:0}
.container{width:min(1180px,calc(100% - 48px));margin:0 auto}

/* 背景层 */
.bgfx{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden;
  background:radial-gradient(120% 80% at 50% -12%,#0b1730 0%,var(--bg) 60%)}
html[data-theme="light"] .bgfx{background:radial-gradient(120% 80% at 50% -12%,#e7eefc 0%,var(--bg) 62%)}
.bgfx .grid{position:absolute;inset:-2px;opacity:.85;
  background-image:linear-gradient(rgba(120,160,220,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(120,160,220,.06) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(100% 65% at 50% 0%,#000 22%,transparent 76%)}
.bgfx .orb{position:absolute;border-radius:50%;filter:blur(100px);opacity:.42}
.bgfx .o1{width:540px;height:540px;left:-160px;top:-140px;background:radial-gradient(circle,rgba(34,211,238,.55),transparent 70%)}
.bgfx .o2{width:620px;height:620px;right:-200px;top:-40px;background:radial-gradient(circle,rgba(124,108,246,.42),transparent 70%)}
.bgfx .o3{width:460px;height:460px;left:42%;top:58%;background:radial-gradient(circle,rgba(244,114,182,.20),transparent 70%)}
.wrap{position:relative;z-index:1}

/* 导航（固定在页面顶端） */
.nav{position:fixed;left:0;right:0;top:0;z-index:80;backdrop-filter:blur(18px);
  background:color-mix(in srgb,var(--bg) 74%,transparent);border-bottom:1px solid transparent;transition:.3s}
.nav.scrolled{border-bottom-color:var(--line);background:color-mix(in srgb,var(--bg) 90%,transparent)}
.nav-inner{display:flex;align-items:center;gap:24px;height:70px}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand-mark{width:36px;height:36px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--accent),var(--accent2));box-shadow:0 8px 22px -8px rgba(34,211,238,.75)}
.brand-mark svg{width:20px;height:20px}
.brand-txt{font-size:16.5px;font-weight:800;line-height:1.2;letter-spacing:.3px}
.brand-txt small{display:block;font-size:10px;font-weight:500;color:var(--dim2);letter-spacing:1.6px;text-transform:uppercase;margin-top:1px}
.nav-links{display:flex;gap:26px;margin-left:auto;font-size:17.5px;color:var(--dim)}
.nav-links a{position:relative;padding:4px 0;transition:color .2s}
.nav-links a:hover{color:var(--txt)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:1.5px;background:var(--accent);transition:width .28s;border-radius:2px}
.nav-links a:hover::after{width:100%}
.nav-right{display:flex;align-items:center;gap:10px;flex:none}
.icon-btn{width:36px;height:36px;border-radius:11px;border:1px solid var(--line);display:grid;place-items:center;color:var(--dim);transition:.2s}
.icon-btn:hover{color:var(--txt);border-color:var(--line2)}
.icon-btn svg{width:16px;height:16px}
html[data-theme="dark"] .i-sun{display:none}
html[data-theme="light"] .i-moon{display:none}
.nav-burger{display:none}

/* 右侧悬浮 · 成为合作服务商 */
.float-cta{position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:90;
  display:flex;flex-direction:column;align-items:center;gap:8px;
  writing-mode:vertical-rl;letter-spacing:3.5px;
  background:linear-gradient(160deg,var(--accent),var(--accent2));color:#04060e;
  font-size:15.5px;font-weight:800;padding:22px 13px;border-radius:14px 0 0 14px;
  box-shadow:-10px 16px 34px -14px rgba(34,211,238,.85);transition:.25s}
html[data-theme="light"] .float-cta{color:#fff}
.float-cta svg{width:18px;height:18px;flex:none}
.float-cta:hover{transform:translateY(-50%) translateX(-3px);box-shadow:-12px 20px 40px -14px rgba(34,211,238,1)}
@media(max-width:680px){
  .float-cta{font-size:13px;letter-spacing:2.5px;padding:14px 9px;gap:6px;border-radius:11px 0 0 11px}
  .float-cta svg{width:15px;height:15px}
}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:12px;
  font-size:14px;font-weight:600;transition:.25s;white-space:nowrap;border:1px solid transparent}
.btn svg{width:15px;height:15px;flex:none}
.btn-primary{background:linear-gradient(115deg,var(--accent),var(--accent2));color:#04060e;
  box-shadow:0 14px 32px -14px rgba(34,211,238,.85)}
html[data-theme="light"] .btn-primary{color:#fff}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 40px -16px rgba(34,211,238,.95)}
.btn-ghost{border-color:var(--line2);color:var(--txt);background:var(--panel2)}
.btn-ghost:hover{background:var(--panel);border-color:var(--accent);transform:translateY(-2px)}
.btn-sm{padding:9px 16px;font-size:13px;border-radius:10px}
.btn-block{width:100%}

/* HERO */
.hero{padding:72px 0 56px;position:relative}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:56px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
  border:1px solid var(--line2);background:var(--panel);font-size:12px;color:var(--dim);letter-spacing:.4px}
.pulse{width:6px;height:6px;border-radius:50%;background:var(--accent);animation:pl 2.2s infinite}
@keyframes pl{0%{box-shadow:0 0 0 0 rgba(34,211,238,.55)}70%{box-shadow:0 0 0 9px rgba(34,211,238,0)}100%{box-shadow:0 0 0 0 rgba(34,211,238,0)}}
.hero h1{margin:20px 0 0;font-size:clamp(34px,4.4vw,56px);line-height:1.14}
.grad{background:linear-gradient(100deg,var(--accent),#a78bfa 48%,var(--accent3));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin-top:20px;color:var(--dim);font-size:15.5px;max-width:560px}
.hero-sub b{color:var(--txt);font-weight:600}
.hero-cta{display:flex;gap:12px;margin-top:30px;flex-wrap:wrap}
.trust{display:flex;align-items:center;gap:10px;margin-top:22px;font-size:12.5px;color:var(--dim2)}
.trust i{width:22px;height:1px;background:var(--line2);display:block}
.hero-visual{position:relative}
.hero-img{position:relative;border-radius:22px;overflow:hidden;border:1px solid var(--line2);box-shadow:var(--shadow);aspect-ratio:4/3}
.hero-img img{width:100%;height:100%;object-fit:cover}
.hero-img::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(4,7,14,.55),transparent 45%)}
html[data-theme="light"] .hero-img::after{background:linear-gradient(to top,rgba(4,7,14,.25),transparent 45%)}
.float{position:absolute;display:flex;align-items:center;gap:9px;padding:10px 14px;border-radius:13px;
  background:rgba(8,13,26,.82);border:1px solid rgba(255,255,255,.16);backdrop-filter:blur(12px);
  font-size:12px;color:#e9eefb;box-shadow:0 16px 40px -18px rgba(0,0,0,.9)}
.float b{font-size:13px;letter-spacing:.4px}
.float small{display:block;font-size:10px;color:#93a1bd;letter-spacing:.4px}
.float .dot{width:7px;height:7px;border-radius:50%;background:var(--ok);box-shadow:0 0 10px rgba(52,211,153,.9)}
.f1{left:-22px;top:34px}
.f2{right:-18px;top:118px}
.f3{left:16px;bottom:-18px}
@media(max-width:1080px){.hero-grid{grid-template-columns:1fr;gap:36px}.hero-visual{max-width:620px}}

/* 首屏 · 叠在图片上的数据条 */
.hero-stats{position:absolute;left:0;right:0;bottom:0;display:grid;grid-template-columns:1fr 1fr 1.18fr 1fr;
  background:rgba(6,10,20,.62);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-top:1px solid rgba(255,255,255,.18);border-radius:0 0 22px 22px;overflow:hidden}
.hs{padding:16px 4px 18px;text-align:center;border-right:1px solid rgba(255,255,255,.14)}
.hs:last-child{border-right:0}
.hs-n{font-size:23px;font-weight:900;line-height:1.1;letter-spacing:-1.2px;
  font-variant-numeric:tabular-nums;color:#fff;text-shadow:0 2px 12px rgba(0,0,0,.35)}
.hs-n em{font-style:normal;font-size:11.5px;font-weight:800;letter-spacing:0;margin-left:2px;color:rgba(255,255,255,.74)}
.hs-l{margin-top:6px;font-size:11px;letter-spacing:.3px;color:rgba(255,255,255,.64);white-space:nowrap}
html[data-theme="light"] .hero-stats{background:rgba(247,249,255,.84);border-top-color:rgba(13,25,55,.12)}
html[data-theme="light"] .hs{border-right-color:rgba(13,25,55,.1)}
html[data-theme="light"] .hs-n{color:#0b1428;text-shadow:none}
html[data-theme="light"] .hs-n em{color:rgba(11,20,40,.6)}
html[data-theme="light"] .hs-l{color:rgba(11,20,40,.56)}
@media(max-width:1080px){.hs-n{font-size:27px}}
@media(max-width:680px){
  .hero-stats{position:relative;margin:-46px 10px 0;border-radius:16px;grid-template-columns:repeat(2,1fr);
    border:1px solid rgba(255,255,255,.16);box-shadow:0 18px 44px -20px rgba(0,0,0,.9)}
  .hs{padding:13px 4px 14px}
  .hs:nth-child(2n){border-right:0}
  .hs:nth-child(1),.hs:nth-child(2){border-bottom:1px solid rgba(255,255,255,.12)}
  .hs-n{font-size:23px;letter-spacing:-.8px}
  .hs-n em{font-size:11px}
  .hs-l{font-size:10.5px;margin-top:4px}
  html[data-theme="light"] .hero-stats{border-color:rgba(13,25,55,.12)}
  html[data-theme="light"] .hs:nth-child(1),html[data-theme="light"] .hs:nth-child(2){border-bottom-color:rgba(13,25,55,.1)}
}

/* 数字条 */
.stat-strip{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--panel2)}
.stat-strip .in{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.st{padding:26px 18px;text-align:center;border-right:1px solid var(--line)}
.st:last-child{border-right:0}
.st-num{font-size:34px;font-weight:800;line-height:1;letter-spacing:-1.2px}
.st-num em{font-size:14px;font-style:normal;font-weight:600;color:var(--dim);margin-left:3px;letter-spacing:0}
.st-lbl{margin-top:7px;font-size:12px;color:var(--dim2);letter-spacing:.6px}

/* 区块 */
.band{padding:78px 0;position:relative}
.band.tight{padding:60px 0}
.sec-head{max-width:720px;margin-bottom:38px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.sec-kicker{font-size:11.5px;letter-spacing:3px;text-transform:uppercase;color:var(--accent);font-weight:700}
.sec-title{margin-top:12px;font-size:clamp(25px,3.1vw,36px);line-height:1.25}
.sec-desc{margin-top:14px;color:var(--dim);font-size:14.5px}
.sec-desc b{color:var(--txt)}

/* 数据规模 · 四宫格 */
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.big{border-radius:var(--radius);border:1px solid var(--line);background:var(--panel2);padding:30px 22px;text-align:center;position:relative;overflow:hidden}
.big::before{content:"";position:absolute;left:0;right:0;top:0;height:1px;background:linear-gradient(90deg,transparent,var(--accent),transparent);opacity:.55}
.big-num{font-size:clamp(34px,4vw,46px);font-weight:800;letter-spacing:-2px;line-height:1;
  background:linear-gradient(120deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.big-num em{font-size:16px;font-style:normal;letter-spacing:0;-webkit-text-fill-color:var(--txt);color:var(--txt);margin-left:2px}
.big-lbl{margin-top:10px;font-size:13px;color:var(--dim)}

.mini-stats{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin-top:18px}
.ms{padding:16px 14px;border-radius:13px;border:1px solid var(--line);background:var(--panel2)}
.ms b{display:block;font-size:21px;font-weight:800;letter-spacing:-.6px}
.ms b em{font-size:11.5px;font-style:normal;color:var(--dim);margin-left:2px;letter-spacing:0}
.ms span{font-size:11px;color:var(--dim2);letter-spacing:.4px}

/* 能力卡 */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.cap{padding:26px 24px;border-radius:var(--radius);border:1px solid var(--line);background:var(--panel2);
  transition:transform .32s,border-color .32s,box-shadow .32s;position:relative;overflow:hidden}
.cap::after{content:"";position:absolute;width:220px;height:220px;right:-90px;top:-100px;border-radius:50%;
  background:radial-gradient(circle,color-mix(in srgb,var(--accent) 20%,transparent),transparent 70%);opacity:0;transition:opacity .4s}
.cap:hover{transform:translateY(-4px);border-color:var(--line2);box-shadow:var(--shadow)}
.cap:hover::after{opacity:1}
.cap-ico{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;margin-bottom:16px;
  background:color-mix(in srgb,var(--accent) 14%,transparent);border:1px solid color-mix(in srgb,var(--accent) 26%,transparent);color:var(--accent)}
.cap-ico svg{width:20px;height:20px}
.cap h3{font-size:16.5px}
.cap p{margin-top:9px;font-size:13px;color:var(--dim)}
.cap ul{margin:14px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:7px}
.cap li{font-size:12.5px;color:var(--dim2);padding-left:16px;position:relative}
.cap li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:2px;
  background:color-mix(in srgb,var(--accent) 60%,transparent);transform:rotate(45deg)}

/* 设备卡 */
.dev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dev{position:relative;padding:24px 22px;border-radius:16px;border:1px solid var(--line);background:var(--panel2);
  transition:.3s;overflow:hidden}
.dev:hover{border-color:color-mix(in srgb,var(--accent) 45%,transparent);transform:translateY(-3px)}
.dev-code{font-size:12px;font-weight:800;letter-spacing:2.4px;color:var(--accent)}
.dev h3{margin-top:6px;font-size:17px}
.dev-cn{margin-top:2px;font-size:11.5px;color:var(--dim2);letter-spacing:.4px}
.dev p{margin-top:12px;font-size:12.5px;color:var(--dim);min-height:40px}
.dev-tags{display:flex;flex-wrap:wrap;gap:5px;margin-top:12px}
.tag{font-size:11px;padding:3px 8px;border-radius:6px;background:var(--panel);border:1px solid var(--line);color:var(--dim)}
.dev-idx{position:absolute;right:14px;top:8px;font-size:40px;font-weight:800;color:var(--panel3);letter-spacing:-2px;line-height:1}

/* 场景域卡 */
.dom-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dom{display:flex;align-items:center;gap:14px;padding:14px;border-radius:14px;border:1px solid var(--line);
  background:var(--panel2);transition:.28s}
.dom:hover{border-color:var(--line2);transform:translateY(-3px);background:var(--panel)}
.dom-thumb{width:80px;height:60px;border-radius:10px;overflow:hidden;flex:none;position:relative}
.dom-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.dom:hover .dom-thumb img{transform:scale(1.08)}
.dom-b{min-width:0;flex:1}
.dom-b h4{font-size:14px;font-weight:700;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.dom-b span{display:block;margin-top:4px;font-size:12px;color:var(--dim2)}
.dom-n{font-size:11px;color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 32%,transparent);
  padding:2px 7px;border-radius:6px;background:color-mix(in srgb,var(--accent) 10%,transparent);flex:none}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:s}
.step{position:relative;padding:22px 18px;border-radius:14px;border:1px solid var(--line);background:var(--panel2);overflow:hidden}
.step::before{content:"";position:absolute;left:0;top:0;width:100%;height:2px;background:linear-gradient(90deg,var(--accent),transparent)}
.step-n{font-size:11px;font-weight:800;color:var(--accent);letter-spacing:2px}
.step h4{margin:9px 0 7px;font-size:15px}
.step p{font-size:12px;color:var(--dim);line-height:1.65}
.step-line{position:absolute;right:-9px;top:34px;width:14px;height:1px;background:var(--line2);display:none}

/* 角色选择 */
.role-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.role{position:relative;border-radius:22px;padding:36px 34px;border:1px solid var(--line);overflow:hidden;
  background:linear-gradient(160deg,var(--panel2),transparent 70%);transition:.35s;display:flex;flex-direction:column}
.role::before{content:"";position:absolute;inset:0;border-radius:22px;padding:1px;
  background:linear-gradient(140deg,color-mix(in srgb,var(--accent) 55%,transparent),transparent 45%);
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:.5;transition:opacity .35s}
.role.b::before{background:linear-gradient(140deg,color-mix(in srgb,var(--accent2) 60%,transparent),transparent 45%)}
.role:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.role:hover::before{opacity:1}
.role-tag{display:inline-flex;align-items:center;gap:7px;font-size:11.5px;letter-spacing:1.4px;color:var(--accent);
  border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);padding:4px 11px;border-radius:999px;
  background:color-mix(in srgb,var(--accent) 9%,transparent);align-self:flex-start;text-transform:uppercase;font-weight:700}
.role.b .role-tag{color:var(--accent2);border-color:color-mix(in srgb,var(--accent2) 32%,transparent);background:color-mix(in srgb,var(--accent2) 9%,transparent)}
.role h3{margin-top:18px;font-size:26px;line-height:1.3}
.role p{margin-top:12px;color:var(--dim);font-size:13.5px;max-width:420px}
.role ul{margin:20px 0 28px;padding:0;list-style:none;display:flex;flex-direction:column;gap:9px}
.role li{font-size:13px;color:var(--dim);display:flex;gap:9px;align-items:flex-start}
.role li svg{width:15px;height:15px;flex:none;margin-top:3px;color:var(--ok)}
.role .btn{margin-top:auto;align-self:flex-start}

/* 优势 */
.grid4.adv{gap:16px}
.adv{padding:24px 20px;border-radius:15px;border:1px solid var(--line);background:var(--panel2)}
.adv-n{font-size:11.5px;font-weight:800;letter-spacing:2px;color:var(--accent2)}
.adv h4{margin:10px 0 8px;font-size:15.5px}
.adv p{font-size:12.5px;color:var(--dim)}

/* 联系 */
.contact-wrap{display:grid;grid-template-columns:1.1fr .9fr;gap:22px;align-items:stretch}
.contact-main{padding:38px 36px;border-radius:22px;border:1px solid var(--line);
  background:linear-gradient(150deg,color-mix(in srgb,var(--accent) 10%,transparent),color-mix(in srgb,var(--accent2) 10%,transparent)),var(--panel2)}
.contact-main h3{font-size:clamp(22px,2.6vw,29px)}
.contact-main p{margin-top:14px;color:var(--dim);font-size:14px;max-width:440px}
.contact-list{display:flex;flex-direction:column;gap:12px}
.cline{display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border-radius:14px;border:1px solid var(--line);background:var(--panel2)}
.cline-ico{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex:none;
  background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent)}
.cline-ico svg{width:16px;height:16px}
.cline small{display:block;font-size:11px;color:var(--dim2);letter-spacing:.5px}
.cline b{display:block;margin-top:2px;font-size:14px;letter-spacing:.3px;font-weight:700}

/* 页脚 */
footer{border-top:1px solid var(--line);padding:34px 0 28px;margin-top:24px}
.foot{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap;font-size:12px;color:var(--dim2)}
.foot-l{display:flex;flex-direction:column;gap:6px}
.foot-l b{color:var(--txt);font-size:13px;font-weight:700}
.foot-r{display:flex;gap:18px;flex-wrap:wrap;align-items:flex-start}
.foot-r a:hover{color:var(--txt)}

.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

@media(max-width:1080px){
  .grid4,.grid3,.dev-grid,.dom-grid{grid-template-columns:repeat(2,1fr)}
  .mini-stats{grid-template-columns:repeat(3,1fr)}
  .flow{grid-template-columns:repeat(3,1fr)}
  .stat-strip .in{grid-template-columns:repeat(2,1fr)}
  .st:nth-child(2){border-right:0}
  .st:nth-child(1),.st:nth-child(2){border-bottom:1px solid var(--line)}
  .role-grid,.contact-wrap{grid-template-columns:1fr}
  .nav-links{display:none}
  .nav-burger{display:grid}
}
@media(max-width:680px){
  .container{width:calc(100% - 32px)}
  .hero{padding:44px 0 34px}
  .hero h1{font-size:31px}
  .band{padding:60px 0}
  .grid4,.grid3,.dev-grid,.dom-grid{grid-template-columns:1fr}
  .flow{grid-template-columns:1fr}
  .mini-stats{grid-template-columns:repeat(2,1fr)}
  .stat-strip .in{grid-template-columns:repeat(2,1fr)}
  .st{padding:18px 10px}.st-num{font-size:26px}.st-lbl{font-size:11px}
  .role{padding:26px 22px}.role h3{font-size:22px}
  .contact-main{padding:28px 22px}
  .f1,.f2,.f3{display:none}
  .foot{flex-direction:column}
  .nav-cta{display:none}
}

/* 移动端菜单 */
.mnav{display:none;position:absolute;left:0;right:0;top:70px;background:var(--bg2);border-bottom:1px solid var(--line);
  padding:8px 24px 16px;flex-direction:column;box-shadow:var(--shadow)}
.mnav.on{display:flex}
.mnav a{padding:12px 0;font-size:16px;color:var(--dim);border-bottom:1px solid var(--line)}
.mnav a:first-child{padding-top:4px}
.mnav a:last-child{border-bottom:0;color:var(--accent);font-weight:600}

/* 服务商页头图 */
.p-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.p-hero-bg{position:absolute;inset:0}
.p-hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center 42%}
.p-hero-bg::after{content:"";position:absolute;inset:0;
  background:linear-gradient(100deg,rgba(5,8,15,.97) 6%,rgba(5,8,15,.86) 44%,rgba(5,8,15,.5) 100%)}
html[data-theme="light"] .p-hero-bg::after{background:linear-gradient(100deg,rgba(245,247,252,.97) 6%,rgba(245,247,252,.9) 44%,rgba(245,247,252,.58) 100%)}
.p-hero .container{position:relative;padding:84px 0 70px}
.p-hero h1{font-size:clamp(30px,3.9vw,48px);line-height:1.18;margin-top:20px;max-width:640px}
.p-hero .hero-sub{max-width:560px}
.p-hero .stat-strip{background:transparent;border:0;margin-top:34px}
.p-hero .in{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
@media(max-width:1080px){.p-hero .in{grid-template-columns:repeat(2,1fr)}}

/* ===== 表单（服务商页） ===== */
.send-state{margin-top:14px;font-size:13px;line-height:1.6;padding:11px 15px;border-radius:11px;border:1px solid transparent}
.send-state:empty{display:none}
.send-state.pending{background:var(--panel2);border-color:var(--line);color:var(--dim)}
.send-state.ok{background:rgba(52,211,153,.12);border-color:rgba(52,211,153,.35);color:#34d399}
.send-state.warn{background:rgba(251,191,36,.12);border-color:rgba(251,191,36,.4);color:#fbbf24}
html[data-theme="light"] .send-state.ok{color:#047857}
html[data-theme="light"] .send-state.warn{color:#b45309}
.form-shell{display:grid;grid-template-columns:320px 1fr;gap:26px;align-items:start}
.form-aside{position:sticky;top:92px;display:flex;flex-direction:column;gap:14px}
.aside-card{padding:22px;border-radius:16px;border:1px solid var(--line);background:var(--panel2)}
.aside-card h4{font-size:14.5px}
.aside-card p{margin-top:8px;font-size:12.5px;color:var(--dim)}
.aside-list{margin:12px 0 0;padding:0;list-style:none;display:flex;flex-direction:column;gap:8px}
.aside-list li{font-size:12.5px;color:var(--dim);display:flex;gap:9px;align-items:flex-start}
.aside-list li b{width:18px;height:18px;border-radius:50%;flex:none;display:grid;place-items:center;font-size:10.5px;
  background:color-mix(in srgb,var(--accent) 16%,transparent);color:var(--accent);font-weight:800;margin-top:2px}
.form-card{border-radius:20px;border:1px solid var(--line);background:var(--panel2);padding:34px}
.f-sec{display:flex;align-items:center;gap:10px;margin:34px 0 18px;font-size:13px;font-weight:700;color:var(--txt)}
.f-sec:first-child{margin-top:0}
.f-sec i{width:22px;height:22px;border-radius:7px;display:grid;place-items:center;font-style:normal;font-size:11px;font-weight:800;
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:#04060e;flex:none}
.f-sec::after{content:"";flex:1;height:1px;background:var(--line)}
.f-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:7px;min-width:0}
.field.full{grid-column:1/-1}
.field label{font-size:12.5px;color:var(--dim);font-weight:600}
.field label em{color:var(--accent3);font-style:normal;margin-left:3px}
.field .hintx{font-size:11px;color:var(--dim2)}
.inp,.sel,.ta{width:100%;padding:12px 14px;border-radius:11px;border:1px solid var(--line);
  background:color-mix(in srgb,var(--bg) 45%,transparent);color:var(--txt);font:inherit;font-size:13.5px;outline:none;transition:.2s;appearance:none}
.inp::placeholder,.ta::placeholder{color:var(--dim2)}
.inp:focus,.sel:focus,.ta:focus{border-color:var(--accent);background:color-mix(in srgb,var(--bg) 25%,transparent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 14%,transparent)}
.ta{resize:vertical;min-height:96px;line-height:1.6}
.sel{background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%238b98b2' stroke-width='2'><path d='m6 9 6 6 6-6'/></svg>");
  background-repeat:no-repeat;background-position:right 12px center;background-size:16px;padding-right:38px}
.sel option{background:var(--bg2);color:var(--txt)}
.radio-row{display:flex;gap:9px;flex-wrap:wrap}
.radio{position:relative}
.radio input{position:absolute;opacity:0;pointer-events:none}
.radio span{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:10px;border:1px solid var(--line2);
  background:var(--panel);font-size:13px;color:var(--txt);cursor:pointer;transition:.2s}
.radio span::before{content:"";width:14px;height:14px;border-radius:50%;border:1.5px solid var(--line2);transition:.2s}
.radio input:checked+span{border-color:color-mix(in srgb,var(--accent) 55%,transparent);color:var(--txt);background:color-mix(in srgb,var(--accent) 10%,transparent)}
.radio input:checked+span::before{border-color:var(--accent);background:radial-gradient(circle,var(--accent) 45%,transparent 47%);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 18%,transparent)}
.radio input:focus-visible+span{box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 20%,transparent)}

/* 场景多选 */
.picker{border:1px solid var(--line);border-radius:14px;background:color-mix(in srgb,var(--bg) 35%,transparent);overflow:hidden}
.pk-head{display:flex;align-items:center;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--panel2)}
.pk-head b{font-size:12.5px}
.pk-head span{margin-left:auto;font-size:11.5px;color:var(--dim2)}
.pk-head span b{color:var(--accent);font-size:12.5px}
.pk-body{max-height:460px;overflow-y:auto;padding:6px 6px 10px;scrollbar-width:thin}
.pk-body::-webkit-scrollbar{width:6px}
.pk-body::-webkit-scrollbar-thumb{background:var(--line2);border-radius:3px}
.pk-dom{padding:10px 10px 6px}
.pk-dom-h{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:700;color:var(--dim);padding:6px 4px;position:sticky;top:-6px;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(6px);z-index:2}
.pk-dom-h b{color:var(--txt);font-size:12.5px}
.pk-dom-h em{font-style:normal;font-size:10.5px;color:var(--dim2);font-weight:500}
.pk-all{margin-left:auto;font-size:11px;color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 28%,transparent);
  padding:2px 8px;border-radius:6px;background:color-mix(in srgb,var(--accent) 8%,transparent)}
.pk-items{display:flex;flex-wrap:wrap;gap:6px;padding:2px 4px 4px}
.chk{position:relative}
.chk input{position:absolute;opacity:0;pointer-events:none}
.chk span{display:inline-block;padding:6px 11px;border-radius:8px;border:1px solid var(--line);background:var(--panel2);
  font-size:12px;color:var(--dim);cursor:pointer;transition:.18s;white-space:nowrap}
.chk span:hover{border-color:var(--line2);color:var(--txt)}
.chk input:checked+span{background:color-mix(in srgb,var(--accent) 16%,transparent);border-color:color-mix(in srgb,var(--accent) 55%,transparent);color:var(--txt)}
.chk input:checked+span::before{content:"✓ ";color:var(--accent);font-weight:800}

/* 上传 */
.up{border:1.5px dashed var(--line2);border-radius:14px;padding:26px 18px;text-align:center;cursor:pointer;
  transition:.22s;background:color-mix(in srgb,var(--bg) 30%,transparent)}
.up:hover,.up.drag{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,transparent)}
.up-ico{width:38px;height:38px;border-radius:11px;margin:0 auto 10px;display:grid;place-items:center;
  background:color-mix(in srgb,var(--accent) 12%,transparent);color:var(--accent)}
.up-ico svg{width:18px;height:18px}
.up b{font-size:13px}
.up p{font-size:11.5px;color:var(--dim2);margin-top:4px}
.up-list{display:flex;flex-direction:column;gap:6px;margin-top:10px}
.up-item{display:flex;align-items:center;gap:9px;padding:8px 11px;border-radius:9px;border:1px solid var(--line);
  background:var(--panel2);font-size:12px;color:var(--dim)}
.up-item b{color:var(--txt);font-weight:600;font-size:12px;max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.up-item em{font-style:normal;margin-left:auto;color:var(--dim2);font-size:11px}
.up-item button{color:var(--dim2);font-size:15px;line-height:1}
.up-item button:hover{color:var(--accent3)}
.f-actions{display:flex;align-items:center;gap:16px;margin-top:30px;flex-wrap:wrap}
.f-actions .btn{padding:14px 34px}
.f-tip{font-size:11.5px;color:var(--dim2)}
.err{color:var(--accent3);font-size:11.5px;display:none;margin-top:2px}
.field.bad .inp,.field.bad .sel,.field.bad .ta{border-color:var(--accent3)}
.field.bad .err{display:block}

/* 提交成功 */
.done{display:none}
.done.on{display:block}
.done-badge{width:56px;height:56px;border-radius:50%;display:grid;place-items:center;margin-bottom:18px;
  background:color-mix(in srgb,var(--ok) 15%,transparent);border:1px solid color-mix(in srgb,var(--ok) 45%,transparent);color:var(--ok)}
.done-badge svg{width:26px;height:26px}
.done h3{font-size:22px}
.done p{margin-top:10px;color:var(--dim);font-size:13.5px}
.done-box{margin-top:18px;padding:16px 18px;border-radius:13px;border:1px solid var(--line);background:color-mix(in srgb,var(--bg) 40%,transparent);
  font-size:12px;color:var(--dim);white-space:pre-wrap;max-height:460px;overflow:auto;line-height:1.8;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.done-btns{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}

@media(max-width:1024px){
  .form-shell{grid-template-columns:1fr}
  .form-aside{position:static;flex-direction:row;flex-wrap:wrap}
  .aside-card{flex:1;min-width:240px}
}
@media(max-width:680px){
  .f-grid{grid-template-columns:1fr}
  .form-card{padding:22px 18px}
  .f-actions .btn{width:100%}
}

/* 品牌副标题改为官网域名（保留原小型大写样式，但域名按原样显示） */
.brand-txt small.url{text-transform:none;letter-spacing:.5px;color:var(--accent);font-weight:600}