:root{
  --bg:#0A0F1C; --bg-2:#0D1424; --card:#111827; --card-2:#151E30;
  --ink:#F1F5F9; --ink-2:#CBD5E1; --mut:#8FA3BF; --mut-2:#7488A6;
  --line:rgba(148,163,184,.14); --line-2:rgba(148,163,184,.24);
  --blue:#3B82F6; --blue-deep:#2563EB; --blue-soft:rgba(59,130,246,.14);
  --cyan:#67E8F9; --amber:#FBBF24; --green:#34D399;
  --grad:linear-gradient(135deg,#60A5FA 0%,#3B82F6 45%,#2563EB 100%);
  --grad-text:linear-gradient(100deg,#93C5FD 0%,#60A5FA 40%,#38BDF8 100%);
  --radius:14px; --radius-s:10px;
  --sans:'Lexend','Noto Sans SC',-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --mono:'IBM Plex Mono',ui-monospace,Menlo,monospace;
  --easing:cubic-bezier(.22,.8,.3,1);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;overflow-x:hidden;}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.7;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;}
::selection{background:rgba(59,130,246,.35);color:#fff;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit;}
img,svg{display:block;max-width:100%;}
h1,h2,h3{word-break:keep-all;line-break:strict;font-weight:600;letter-spacing:-.01em;}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:4px;}

/* ── 背景氛围 ── */
.bg-fx{position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(900px 500px at 85% -10%, rgba(37,99,235,.16), transparent 60%),
    radial-gradient(700px 480px at -8% 20%, rgba(56,189,248,.07), transparent 60%),
    radial-gradient(1000px 600px at 50% 115%, rgba(37,99,235,.10), transparent 60%),
    var(--bg);}
.bg-grid{position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(148,163,184,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(148,163,184,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 40%,transparent 100%);}

/* ── 布局 ── */
.wrap{max-width:1180px;margin:0 auto;padding:0 28px;}
main{display:block;}

/* ── 顶栏 ── */
.topbar{position:sticky;top:0;z-index:100;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  background:rgba(10,15,28,.78);border-bottom:1px solid var(--line);transition:border-color .25s,background .25s;}
.topbar.scrolled{background:rgba(10,15,28,.92);border-bottom-color:var(--line-2);}
.topbar-in{max-width:1180px;margin:0 auto;padding:0 28px;height:68px;display:flex;align-items:center;gap:36px;}
.logo{display:flex;align-items:center;gap:12px;flex:none;}
.logo-mark{width:38px;height:38px;border-radius:10px;background:var(--grad);display:flex;align-items:center;justify-content:center;
  color:#fff;font-weight:700;font-size:19px;box-shadow:0 4px 18px rgba(37,99,235,.4);}
.logo-t{font-weight:600;font-size:16.5px;letter-spacing:.01em;display:flex;flex-direction:column;line-height:1.25;}
.logo-t i{font-style:normal;font-family:var(--mono);font-size:9px;letter-spacing:.22em;color:var(--mut);font-weight:400;}
.nav-links{display:flex;gap:6px;list-style:none;flex:1;}
.nav-links a{display:block;padding:8px 15px;border-radius:9px;font-size:14.5px;color:var(--ink-2);transition:color .18s,background .18s;}
.nav-links a:hover{color:var(--ink);background:rgba(148,163,184,.09);}
.nav-links a.active{color:var(--ink);background:rgba(59,130,246,.13);}
.top-cta{flex:none;display:flex;align-items:center;gap:14px;margin-left:auto;}
.top-mail{font-family:var(--mono);font-size:12.5px;color:var(--mut);transition:color .18s;}
.top-mail:hover{color:var(--blue);}
.menu-btn{display:none;width:44px;height:44px;border-radius:10px;border:1px solid var(--line-2);align-items:center;justify-content:center;}
.menu-btn svg{width:20px;height:20px;stroke:var(--ink);}

/* ── 按钮 ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 26px;border-radius:11px;
  font-size:15px;font-weight:500;transition:transform .18s var(--easing),box-shadow .18s,background .18s,border-color .18s;cursor:pointer;}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 24px rgba(37,99,235,.35);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(37,99,235,.5);}
.btn-primary:active{transform:translateY(0);}
.btn-ghost{border:1px solid var(--line-2);color:var(--ink);background:rgba(148,163,184,.04);}
.btn-ghost:hover{border-color:var(--blue);background:var(--blue-soft);color:#fff;}
.btn .kbd{font-family:var(--mono);font-size:13px;opacity:.75;}

/* ── 徽标行 / 大标题 ── */
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:12px;letter-spacing:.18em;
  color:#93C5FD;text-transform:uppercase;padding:7px 14px;border:1px solid rgba(59,130,246,.3);border-radius:99px;background:var(--blue-soft);}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue);box-shadow:0 0 10px var(--blue);}
.h1{font-size:clamp(38px,5.6vw,66px);line-height:1.12;letter-spacing:-.02em;font-weight:600;}
.h1 .grad{background:var(--grad-text);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.h2{font-size:clamp(28px,3.6vw,42px);line-height:1.2;letter-spacing:-.015em;}
.sub{font-size:17.5px;color:var(--mut);max-width:640px;line-height:1.75;}

/* ── Hero ── */
.hero{padding:96px 0 72px;position:relative;}
.hero-top{display:flex;align-items:center;justify-content:space-between;gap:48px;}
.hero-badge-row{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0 22px;}
.chip{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--ink-2);padding:7px 14px;
  border:1px solid var(--line);border-radius:99px;background:rgba(17,24,39,.6);font-family:var(--mono);}
.chip b{color:#93C5FD;font-weight:500;}
.hero-cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap;}
.hero-trust{display:flex;gap:34px;margin-top:46px;padding-top:28px;border-top:1px solid var(--line);flex-wrap:wrap;}
.trust-item b{font-size:24px;font-weight:600;color:var(--ink);font-family:var(--mono);letter-spacing:-.01em;}
.trust-item span{display:block;font-size:12.5px;color:var(--mut);margin-top:2px;}

/* ── 客户标墙 ── */
.logo-wall{padding:34px 0 10px;border-top:1px solid var(--line);}
.logo-wall p{font-family:var(--mono);font-size:11.5px;letter-spacing:.2em;color:var(--mut-2);text-transform:uppercase;margin-bottom:20px;text-align:center;}
.logo-row{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;}
.logo-pill{font-size:14px;font-weight:500;color:var(--mut);padding:11px 22px;border:1px solid var(--line);border-radius:11px;
  background:rgba(17,24,39,.5);transition:color .2s,border-color .2s;}
.logo-pill:hover{color:var(--ink-2);border-color:var(--line-2);}

/* ── 区块 ── */
section{position:relative;}
.sec{padding:96px 0;}
.sec-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:52px;flex-wrap:wrap;}
.sec-tag{font-family:var(--mono);font-size:12px;letter-spacing:.2em;color:#93C5FD;text-transform:uppercase;display:flex;align-items:center;gap:10px;}
.sec-tag::before{content:"";width:26px;height:1px;background:var(--blue);}

/* 服务卡 */
.svc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;}
.svc{position:relative;padding:34px 32px 30px;border:1px solid var(--line);border-radius:var(--radius);
  background:linear-gradient(180deg,rgba(21,30,48,.7),rgba(17,24,39,.4));overflow:hidden;transition:border-color .25s,transform .25s var(--easing),box-shadow .25s;cursor:pointer;}
.svc:hover{border-color:rgba(59,130,246,.45);transform:translateY(-4px);box-shadow:0 20px 48px rgba(2,6,17,.5);}
.svc::before{content:"";position:absolute;top:0;left:32px;right:32px;height:1px;background:linear-gradient(90deg,transparent,rgba(96,165,250,.5),transparent);opacity:0;transition:opacity .25s;}
.svc:hover::before{opacity:1;}
.svc-no{font-family:var(--mono);font-size:12px;color:#60A5FA;letter-spacing:.14em;}
.svc h3{font-size:21px;margin:14px 0 10px;}
.svc p{font-size:14.5px;color:var(--mut);line-height:1.75;}
.svc-feats{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
.svc-feats span{font-family:var(--mono);font-size:11.5px;color:var(--ink-2);padding:5px 11px;border:1px solid var(--line);border-radius:7px;}
.svc-meta{display:flex;justify-content:space-between;align-items:center;margin-top:24px;padding-top:18px;border-top:1px solid var(--line);}
.svc-price{font-family:var(--mono);font-size:15px;color:var(--ink);}
.svc-price small{display:block;font-size:11px;color:var(--mut-2);letter-spacing:.05em;}
.svc-go{color:#60A5FA;font-size:13.5px;display:flex;align-items:center;gap:6px;transition:gap .2s;}
.svc:hover .svc-go{gap:10px;}

/* 案例卡 */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.case-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card);
  transition:border-color .25s,transform .25s var(--easing),box-shadow .25s;display:flex;flex-direction:column;}
.case-card:hover{border-color:rgba(59,130,246,.45);transform:translateY(-4px);box-shadow:0 20px 48px rgba(2,6,17,.5);}
.case-fig{aspect-ratio:16/10;background:var(--card-2);border-bottom:1px solid var(--line);overflow:hidden;}
.case-fig img{width:100%;height:100%;object-fit:cover;object-fit:contain;transition:transform .4s var(--easing);}
.case-card:hover .case-fig img{transform:scale(1.04);}
.case-body{padding:24px 24px 22px;display:flex;flex-direction:column;flex:1;}
.case-k{font-family:var(--mono);font-size:11px;color:#60A5FA;letter-spacing:.16em;text-transform:uppercase;}
.case-body h3{font-size:18.5px;margin:10px 0 8px;}
.case-body p{font-size:13.5px;color:var(--mut);line-height:1.7;flex:1;}
.case-metric{display:flex;gap:18px;margin-top:18px;padding-top:16px;border-top:1px solid var(--line);}
.case-metric b{font-family:var(--mono);font-size:16px;color:var(--ink);}
.case-metric span{font-size:11.5px;color:var(--mut-2);display:block;}

/* 承诺区 (对位卡) */
.promise-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.promise{padding:30px 28px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);}
.promise .no{font-family:var(--mono);font-size:12px;color:#60A5FA;letter-spacing:.14em;}
.promise h3{font-size:18px;margin:12px 0 8px;}
.promise p{font-size:14px;color:var(--mut);line-height:1.75;}
.promise ul{list-style:none;margin-top:16px;display:flex;flex-direction:column;gap:9px;}
.promise li{font-size:13.5px;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start;}
.promise li::before{content:"+";color:var(--blue);font-weight:600;font-family:var(--mono);}

/* 流程 */
.flow{display:grid;grid-template-columns:repeat(5,1fr);gap:0;position:relative;}
.flow::before{content:"";position:absolute;top:23px;left:8%;right:8%;height:1px;background:linear-gradient(90deg,rgba(59,130,246,.1),rgba(59,130,246,.5),rgba(59,130,246,.1));}
.step{text-align:left;padding:0 18px;position:relative;}
.step-dot{width:46px;height:46px;border-radius:12px;background:var(--card);border:1px solid rgba(59,130,246,.4);display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:14px;color:#60A5FA;position:relative;z-index:1;box-shadow:0 0 0 6px var(--bg);}
.step h4{font-size:15.5px;margin:16px 0 6px;}
.step p{font-size:13px;color:var(--mut);line-height:1.65;}

/* 估价器 */
.est-wrap{display:grid;grid-template-columns:1.2fr .8fr;gap:18px;align-items:stretch;}
.est-panel{border:1px solid var(--line);border-radius:var(--radius);background:linear-gradient(180deg,rgba(21,30,48,.8),rgba(17,24,39,.5));padding:34px;}
.est-q{margin-bottom:26px;}
.est-q > label,.est-legend{display:block;font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;color:#93C5FD;text-transform:uppercase;margin-bottom:13px;}
.seg{display:flex;gap:8px;flex-wrap:wrap;}
.seg label{flex:1;min-width:130px;text-align:center;padding:12px 14px;border:1px solid var(--line-2);border-radius:10px;font-size:14px;color:var(--ink-2);
  cursor:pointer;transition:all .18s;position:relative;}
.seg label:hover{border-color:rgba(59,130,246,.5);}
.seg input{position:absolute;opacity:0;pointer-events:none;}
.seg input:checked + span{color:#fff;}
.seg label:has(input:checked){background:var(--blue-soft);border-color:var(--blue);color:#fff;box-shadow:0 0 0 1px var(--blue),0 6px 18px rgba(37,99,235,.25);}
.seg-adds{margin-top:20px;}
.seg-adds .seg label{min-width:110px;font-size:13px;padding:10px 12px;}
.est-side{border:1px solid rgba(59,130,246,.35);border-radius:var(--radius);background:
  radial-gradient(400px 240px at 80% 0%, rgba(37,99,235,.22), transparent 65%), var(--card);
  padding:34px;display:flex;flex-direction:column;}
.est-side-tag{font-family:var(--mono);font-size:11.5px;letter-spacing:.16em;color:#93C5FD;text-transform:uppercase;}
.est-price{font-family:var(--mono);font-size:clamp(30px,3vw,40px);font-weight:600;color:#fff;margin:16px 0 4px;letter-spacing:-.01em;}
.est-price .range-dash{color:var(--blue);padding:0 4px;}
.est-price-sub{font-size:12.5px;color:var(--mut);margin-bottom:22px;}
.est-break{flex:1;border-top:1px solid var(--line);padding-top:8px;}
.est-break .row{display:flex;justify-content:space-between;align-items:center;padding:9px 0;font-size:13.5px;color:var(--ink-2);border-bottom:1px dashed var(--line);}
.est-break .row b{font-family:var(--mono);font-size:13px;color:var(--ink);}
.est-break .row.sum{border-bottom:none;color:#93C5FD;}
.est-cta{display:flex;flex-direction:column;gap:10px;margin-top:22px;}
.est-cta .btn{width:100%;}

/* 条款条 */
.clauses{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;}
.clause{padding:20px 18px;border:1px solid var(--line);border-radius:var(--radius-s);background:rgba(17,24,39,.6);text-align:center;transition:border-color .2s;}
.clause:hover{border-color:rgba(59,130,246,.4);}
.clause b{display:block;font-size:14.5px;color:var(--ink);margin-bottom:4px;}
.clause span{font-size:12px;color:var(--mut);}
.clause .mono{font-family:var(--mono);color:#60A5FA;}

/* 页脚 */
footer{border-top:1px solid var(--line);padding:52px 0 40px;background:var(--bg-2);}
.foot-grid{display:flex;justify-content:space-between;gap:40px;flex-wrap:wrap;margin-bottom:40px;}
.foot-brand p{font-size:13px;color:var(--mut);max-width:340px;margin-top:12px;line-height:1.7;}
.foot-col b{display:block;font-size:13px;color:var(--ink);margin-bottom:14px;font-weight:500;}
.foot-col a{display:block;font-size:13.5px;color:var(--mut);padding:5px 0;transition:color .18s;}
.foot-col a:hover{color:#93C5FD;}
.foot-base{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-top:24px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--mut-2);font-family:var(--mono);}
.foot-base a{color:var(--mut);transition:color .18s;}
.foot-base a:hover{color:#93C5FD;}

/* ── TG 聊天（契约结构, 深色皮肤） ── */
.chat-fab{position:fixed;right:22px;bottom:24px;width:58px;height:58px;border-radius:50%;background:var(--grad);color:#fff;
  display:flex;align-items:center;justify-content:center;z-index:210;box-shadow:0 10px 30px rgba(37,99,235,.5);transition:transform .2s var(--easing);cursor:pointer;}
.chat-fab:hover{transform:scale(1.07);}
.chat-fab svg{width:25px;height:25px;}
.chat-fab .badge{position:absolute;top:-3px;right:-3px;min-width:20px;height:20px;border-radius:99px;background:#EF4444;color:#fff;font-size:11px;
  display:none;align-items:center;justify-content:center;padding:0 5px;font-weight:600;}
.chat-fab .badge.show{display:flex;}
.chat-panel{position:fixed;right:22px;bottom:94px;width:376px;max-width:calc(100vw - 30px);height:500px;max-height:calc(100dvh - 120px);
  border-radius:16px;border:1px solid rgba(148,163,184,.22);z-index:210;display:none;flex-direction:column;overflow:hidden;
  background:var(--card);box-shadow:0 32px 80px rgba(2,6,17,.7);}
.chat-panel.open{display:flex;}
.chat-head{display:flex;align-items:center;gap:12px;padding:15px 18px;background:linear-gradient(180deg,rgba(37,99,235,.22),rgba(37,99,235,.08));border-bottom:1px solid var(--line);}
.chat-head .avatar{width:38px;height:38px;border-radius:11px;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600;font-size:16px;flex:none;}
.chat-head .who b{display:block;font-size:14.5px;font-weight:600;}
.chat-head .who span{font-size:11.5px;color:var(--mut);display:flex;align-items:center;gap:6px;}
.chat-head .dot{width:7px;height:7px;border-radius:50%;background:var(--green);box-shadow:0 0 8px var(--green);display:inline-block;animation:pulse 2.4s infinite;}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.chat-close{margin-left:auto;width:34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;color:var(--mut);transition:all .18s;}
.chat-close:hover{background:rgba(148,163,184,.12);color:#fff;}
.chat-close svg{width:16px;height:16px;}
.chat-view{display:flex;flex-direction:column;flex:1;min-height:0;}
.chat-msgs{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:12px;}
.chat-msgs .m{max-width:82%;padding:11px 15px;border-radius:13px;font-size:14px;line-height:1.6;white-space:pre-wrap;word-break:break-word;}
.chat-msgs .m.owner{align-self:flex-end;background:var(--blue-deep);color:#fff;border-bottom-right-radius:4px;}
.chat-msgs .m.guest{align-self:flex-start;background:var(--card-2);border:1px solid var(--line);color:var(--ink-2);border-bottom-left-radius:4px;}
.chat-msgs .typing{font-size:12.5px;color:var(--mut-2);align-self:flex-start;padding:6px 4px;}
.chat-input{display:flex;gap:10px;padding:14px 16px;border-top:1px solid var(--line);background:var(--bg-2);align-items:flex-end;}
.chat-input textarea{flex:1;resize:none;border:1px solid var(--line-2);background:var(--card);border-radius:11px;color:var(--ink);
  font-family:inherit;font-size:14.5px;padding:11px 14px;max-height:110px;transition:border-color .18s;}
.chat-input textarea:focus{outline:2px solid var(--blue);outline-offset:2px;border-color:var(--blue);}
.chat-input textarea::placeholder{color:var(--mut-2);}
.chat-send{width:44px;height:44px;border-radius:11px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;flex:none;transition:transform .15s;}
.chat-send:hover{transform:scale(1.05);}
.chat-send svg{width:18px;height:18px;}

/* ── 页面级：子页 hero ── */
.page-hero{padding:76px 0 56px;border-bottom:1px solid var(--line);position:relative;overflow:hidden;}
.page-hero .h1{font-size:clamp(32px,4.6vw,52px);}
.crumb{font-family:var(--mono);font-size:12.5px;color:var(--mut);margin-bottom:22px;display:flex;gap:10px;align-items:center;flex-wrap:wrap;}
.crumb a{color:#93C5FD;}
.crumb a:hover{text-decoration:underline;}
.ph-stats{display:flex;gap:16px;flex-wrap:wrap;margin-top:30px;}
.ph-stat{display:inline-flex;align-items:center;gap:9px;font-size:13.5px;color:var(--ink-2);padding:9px 17px;border:1px solid var(--line);border-radius:99px;background:rgba(17,24,39,.6);}
.ph-stat b{font-family:var(--mono);color:#93C5FD;font-weight:500;}

/* 内容卡通用 */
.card{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);padding:30px;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:18px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}

/* FAQ */
.faq{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card);}
.faq details{border-bottom:1px solid var(--line);}
.faq details:last-child{border-bottom:none;}
.faq summary{list-style:none;padding:20px 26px;font-size:15.5px;font-weight:500;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;transition:background .18s;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{background:rgba(148,163,184,.05);}
.faq summary::after{content:"+";font-family:var(--mono);font-size:19px;color:var(--blue);transition:transform .2s;flex:none;}
.faq details[open] summary::after{transform:rotate(45deg);}
.faq .faq-a{padding:0 26px 22px;font-size:14.5px;color:var(--mut);line-height:1.8;max-width:760px;}

/* 数据条 */
.metric-band{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card);}
.metric-band > div{padding:30px 26px;border-right:1px solid var(--line);}
.metric-band > div:last-child{border-right:none;}
.metric-band b{font-family:var(--mono);font-size:clamp(26px,2.6vw,34px);font-weight:600;display:block;
  background:var(--grad-text);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;}
.metric-band span{font-size:13px;color:var(--mut);margin-top:6px;display:block;}

/* CTA 收口 */
.cta-band{margin:0 28px 96px;border:1px solid rgba(59,130,246,.4);border-radius:20px;padding:60px 48px;text-align:center;position:relative;overflow:hidden;
  background:radial-gradient(700px 300px at 50% 0%, rgba(37,99,235,.28), transparent 70%), var(--card);}
.cta-band .h2{margin:14px 0 12px;}
.cta-band .sub{margin:0 auto 30px;}
.cta-band .hero-cta{justify-content:center;}

/* reveal 动画 */
.reveal{transition:opacity .7s var(--easing),transform .7s var(--easing);}
.js .reveal:not(.in){opacity:0;transform:translateY(22px);}
.js .reveal.in{opacity:1;transform:none;}
@media print{.reveal{opacity:1 !important;transform:none !important;}.chat-fab,.chat-panel,.bg-fx,.bg-grid,.topbar,.skip{display:none !important;}body{background:#fff;color:#000;}.sec{padding:24px 0;}a{color:#000;}}
.reveal.d1{transition-delay:.08s;} .reveal.d2{transition-delay:.16s;} .reveal.d3{transition-delay:.24s;} .reveal.d4{transition-delay:.32s;}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  html{scroll-behavior:auto;}
  *{animation:none !important;}
}

/* 响应式 */
@media (max-width:1024px){
  .svc-grid,.case-grid{grid-template-columns:repeat(2,1fr);}
  .flow{grid-template-columns:repeat(2,1fr);gap:28px;}
  .flow::before{display:none;}
  .est-wrap{grid-template-columns:1fr;}
  .clauses{grid-template-columns:repeat(3,1fr);}
  .metric-band{grid-template-columns:repeat(2,1fr);}
  .metric-band > div:nth-child(2){border-right:none;}
  .metric-band > div:nth-child(-n+2){border-bottom:1px solid var(--line);}
  .promise-grid{grid-template-columns:1fr;}
  .grid-4{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:600px){
  .topbar-in{gap:12px;}
  .top-cta .btn-primary{display:none;}
  .lang-switch{display:none;}
  .logo-t i{display:none;}
}
@media (max-width:768px){
  .nav-links{position:fixed;inset:68px 0 auto 0;background:rgba(10,15,28,.97);backdrop-filter:blur(20px);flex-direction:column;gap:2px;padding:18px 22px 24px;
    border-bottom:1px solid var(--line-2);display:none;z-index:99;}
  .nav-links.open{display:flex;}
  .nav-links a{padding:13px 16px;font-size:16px;}
  .menu-btn{display:flex;}
  .top-mail{display:none;}
  .hero{padding:60px 0 48px;}
  .hero-top{flex-direction:column;align-items:flex-start;gap:36px;}
  .sec{padding:64px 0;}
  .svc-grid,.case-grid,.grid-2,.grid-3{grid-template-columns:1fr;}
  .clauses{grid-template-columns:repeat(2,1fr);}
  .flow{grid-template-columns:1fr;gap:22px;}
  .wrap{padding:0 20px;}
  .topbar-in{padding:0 20px;}
  .cta-band{margin:0 16px 64px;padding:44px 24px;}
  .est-panel,.est-side{padding:26px 22px;}
  .hero-trust{gap:22px;}
  .trust-item b{font-size:20px;}
}
@media (max-width:420px){
  .seg label{min-width:calc(50% - 4px);}
  .clauses{grid-template-columns:1fr;}
}

/* ═══ 页面级组件 ═══ */
.case-fig-frame{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#F6F7F9;position:relative;}
.case-fig-frame::after{content:"";position:absolute;top:0;left:0;right:0;height:26px;background:linear-gradient(180deg,rgba(2,6,17,.06),transparent);pointer-events:none;}
.case-fig-frame img{width:100%;}
.quote{border-left:3px solid var(--blue);padding:6px 0 6px 24px;font-size:16.5px;color:var(--ink-2);line-height:1.8;font-style:normal;}
.quote cite{display:block;font-style:normal;font-size:12.5px;color:var(--mut-2);margin-top:12px;font-family:var(--mono);}
.tier{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);padding:30px 28px;position:relative;display:flex;flex-direction:column;transition:border-color .25s,transform .25s var(--easing);}
.tier:hover{border-color:rgba(59,130,246,.4);transform:translateY(-3px);}
.tier.hot{border-color:rgba(59,130,246,.55);background:radial-gradient(400px 200px at 80% 0%,rgba(37,99,235,.16),transparent 60%),var(--card);}
.tier .tk{font-family:var(--mono);font-size:11px;letter-spacing:.16em;color:#60A5FA;text-transform:uppercase;}
.tier .tp{font-family:var(--mono);font-size:clamp(26px,2.4vw,32px);font-weight:600;color:#fff;margin:14px 0 2px;}
.tier .tw{font-size:12.5px;color:var(--mut-2);margin-bottom:18px;}
.tier ul{list-style:none;display:flex;flex-direction:column;gap:10px;flex:1;}
.tier li{font-size:14px;color:var(--ink-2);display:flex;gap:9px;}
.tier li::before{content:"→";color:var(--blue);font-family:var(--mono);font-size:12px;margin-top:2px;}
.pricerow{display:grid;grid-template-columns:2fr 1.1fr 1.1fr 1.1fr auto;align-items:center;gap:14px;padding:20px 24px;border:1px solid var(--line);border-radius:var(--radius);background:var(--card);transition:border-color .2s;}
.pricerow:hover{border-color:rgba(59,130,246,.4);}
.pricerow .pn{font-size:16.5px;font-weight:500;}
.pricerow .pn small{display:block;font-weight:400;font-size:12.5px;color:var(--mut);margin-top:3px;}
.pricerow .pc{font-family:var(--mono);font-size:14px;color:#93C5FD;}
.pricerow .pc small{display:block;color:var(--mut-2);font-size:11px;}
.pricerow .go{color:#60A5FA;font-size:13.5px;white-space:nowrap;display:flex;align-items:center;gap:6px;}
.feat-ic{width:42px;height:42px;border-radius:11px;background:var(--blue-soft);border:1px solid rgba(59,130,246,.3);display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:13px;color:#93C5FD;margin-bottom:16px;}
.contact-hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px;}
.chipbtn{font-size:14px;color:var(--ink-2);padding:11px 18px;border:1px solid var(--line-2);border-radius:11px;background:rgba(17,24,39,.6);transition:all .18s;cursor:pointer;}
.chipbtn:hover{border-color:var(--blue);color:#fff;background:var(--blue-soft);}
.skip{position:fixed;left:-9999px;top:10px;z-index:300;background:var(--blue);color:#fff;padding:10px 16px;border-radius:8px;font-size:13px;}
.skip:focus{left:10px;}
.chat-chips{display:flex;flex-direction:column;gap:8px;padding:0 16px 12px;}
.chat-chips button{font-size:13px;text-align:left;padding:9px 13px;border:1px solid var(--line);border-radius:10px;background:rgba(21,30,48,.6);color:var(--ink-2);transition:all .18s;}
.chat-chips button:hover{border-color:var(--blue);color:#fff;}

/* ═══════ 视觉改版: 大图 + 动效 ═══════ */
/* Hero: 双栏大图 */
.hero-visual{position:relative;flex:1;min-width:440px;perspective:1400px;}
.hv-stack{position:relative;height:520px;transform-style:preserve-3d;}
.hv-main{position:absolute;right:0;top:10px;width:min(560px,100%);border-radius:18px;
  box-shadow:0 40px 100px rgba(2,6,17,.7),0 0 80px rgba(37,99,235,.18);
  animation:float 7s ease-in-out infinite;}
.hv-float1{position:absolute;left:-20px;bottom:-10px;width:180px;border-radius:26px;
  box-shadow:0 30px 70px rgba(2,6,17,.8),0 0 50px rgba(37,99,235,.25);
  animation:float 5.5s ease-in-out .8s infinite;}
.hv-glow{position:absolute;inset:-8% -6%;background:radial-gradient(closest-side,rgba(37,99,235,.25),transparent 70%);
  filter:blur(40px);z-index:-1;animation:breathe 6s ease-in-out infinite;}
@keyframes float{0%,100%{transform:translateY(0) rotateY(-2deg)}50%{transform:translateY(-16px) rotateY(2deg)}}
@keyframes breathe{0%,100%{opacity:.6}50%{opacity:1}}

/* 行业标墙: 无限滚动 */
.marquee{overflow:hidden;position:relative;mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);}
.marquee-track{display:flex;gap:14px;width:max-content;animation:scroll 26s linear infinite;}
.marquee:hover .marquee-track{animation-play-state:paused;}
@keyframes scroll{to{transform:translateX(-50%)}}
.marquee-track .logo-pill{white-space:nowrap;}

/* 大图区块: 左右交替 */
.showcase{display:grid;grid-template-columns:1fr 1.1fr;gap:64px;align-items:center;padding:72px 0;}
.showcase.flip .sc-text{order:2;}
.showcase.flip .sc-fig{order:1;}
.sc-fig{position:relative;}
.sc-fig img{width:100%;border-radius:18px;box-shadow:0 36px 90px rgba(2,6,17,.65),0 0 70px rgba(37,99,235,.14);
  transition:transform .5s var(--easing),box-shadow .5s;}
.sc-fig:hover img{transform:translateY(-8px) scale(1.015);box-shadow:0 48px 110px rgba(2,6,17,.8),0 0 100px rgba(37,99,235,.24);}
.sc-fig::before{content:"";position:absolute;inset:-10% -8%;background:radial-gradient(closest-side,rgba(37,99,235,.16),transparent 70%);filter:blur(36px);z-index:-1;}
.sc-tag{font-family:var(--mono);font-size:11.5px;letter-spacing:.2em;color:#93C5FD;text-transform:uppercase;display:flex;align-items:center;gap:10px;}
.sc-tag::before{content:"";width:24px;height:1px;background:var(--blue);}
.sc-text h3{font-size:clamp(24px,2.8vw,34px);line-height:1.22;margin:16px 0 12px;letter-spacing:-.015em;}
.sc-text p{font-size:16px;color:var(--mut);line-height:1.8;max-width:420px;}
.sc-metrics{display:flex;gap:36px;margin-top:26px;}
.sc-metrics b{font-family:var(--mono);font-size:26px;font-weight:600;color:#93C5FD;display:block;}
.sc-metrics span{font-size:12.5px;color:var(--mut-2);}

/* 数字滚动 */
.count-up{font-variant-numeric:tabular-nums;}

/* 服务: 图卡化（每卡带 mockup 缩略） */
.svc-v2{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--card);
  transition:border-color .25s,transform .25s var(--easing),box-shadow .25s;display:block;}
.svc-v2:hover{border-color:rgba(59,130,246,.5);transform:translateY(-5px);box-shadow:0 24px 60px rgba(2,6,17,.55);}
.svc-v2 .fig{aspect-ratio:16/9;overflow:hidden;background:var(--card-2);position:relative;}
.svc-v2 .fig img{width:100%;height:100%;object-fit:cover;object-fit:contain;padding:10px;transition:transform .45s var(--easing);}
.svc-v2:hover .fig img{transform:scale(1.05);}
.svc-v2 .body{padding:22px 24px 24px;}
.svc-v2 h3{font-size:18px;margin-bottom:6px;}
.svc-v2 p{font-size:13.5px;color:var(--mut);line-height:1.65;}
.svc-v2 .meta{display:flex;justify-content:space-between;margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:13px;color:#93C5FD;}
.svc-v2 .meta small{color:var(--mut-2);font-size:11px;display:block;}
.svc-v2 .go{color:#60A5FA;font-size:13px;}

@media (max-width:1024px){
  .showcase{grid-template-columns:1fr;gap:36px;padding:52px 0;}
  .showcase.flip .sc-text{order:1;} .showcase.flip .sc-fig{order:2;}
  .hero-visual{min-width:0;width:100%;}
  .hv-stack{height:400px;}
  .hv-main{width:100%;}
}
@media (max-width:768px){
  .hv-stack{height:330px;}
  .hv-float1{display:none;}
  .sc-fig img[style*="position:absolute"]{display:none !important;}
  .sc-fig{margin-bottom:8px;}
  .sc-metrics{gap:24px;}
}