:root{
  --c-main:#0b5fff; --c-deep:#0f2f8a; --c-cyan:#12b0ff;
  --ink:#182437; --mut:#5d6b84; --line:#e5ecf7; --bg:#f4f8ff;
  --grad:linear-gradient(135deg,#0f2f8a,#0b5fff 52%,#12b0ff);
  --grad2:linear-gradient(135deg,#ff8a3d,#ff5e3a);
  --radius:16px;
  --shadow:0 10px 30px rgba(15,47,138,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:76px}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif;color:var(--ink);background:#fff;line-height:1.75;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{width:min(1160px,92%);margin:0 auto}
.section{padding:86px 0}
.section-soft{background:var(--bg)}
.sec-head{text-align:center;max-width:780px;margin:0 auto 48px}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;color:var(--c-main);background:#e9f1ff;border:1px solid #d5e3ff;padding:5px 16px;border-radius:999px;margin-bottom:14px}
.sec-head h2{font-size:clamp(25px,3.4vw,36px);font-weight:800;line-height:1.3}
.sec-head h2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.sec-head p{color:var(--mut);margin-top:12px;font-size:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border-radius:999px;padding:12px 26px;font-size:15px;font-weight:600;cursor:pointer;border:0;transition:transform .2s,box-shadow .2s,background .2s;line-height:1.4}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(11,95,255,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(11,95,255,.4)}
.btn-orange{background:var(--grad2);color:#fff;box-shadow:0 8px 22px rgba(255,94,58,.3)}
.btn-orange:hover{transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--c-main);border:1.5px solid #c9dcff}
.btn-ghost:hover{background:#eef4ff}
.btn-lg{padding:15px 32px;font-size:16px}
.btn-block{width:100%}
/* 顶部导航 */
.hdr{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hdr .container{display:flex;align-items:center;gap:28px;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;white-space:nowrap}
.brand .logo{width:38px;height:38px;border-radius:11px;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;box-shadow:0 6px 16px rgba(11,95,255,.35);flex:none}
.brand b{display:block;font-size:17px;line-height:1.25}
.brand small{display:block;font-size:11px;font-weight:500;color:var(--mut);letter-spacing:.5px}
.nav{display:flex;gap:26px;margin-left:auto;font-size:15px}
.nav a{color:#35435f;font-weight:500;position:relative;padding:6px 0;transition:color .2s}
.nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2.5px;border-radius:2px;background:var(--c-main);transition:right .25s}
.nav a:hover,.nav a.active{color:var(--c-main)}
.nav a.active::after{right:0}
.hdr .actions{display:flex;align-items:center;gap:12px}
.hdr .tel{font-size:15px;color:var(--ink);font-weight:600;white-space:nowrap}
.hdr .tel b{color:var(--c-main);font-size:17px}
.burger{display:none;margin-left:auto;background:none;border:0;font-size:26px;cursor:pointer;color:var(--ink);line-height:1}
/* 首屏 */
.hero{position:relative;overflow:hidden;background:radial-gradient(900px 480px at 85% -12%,#e3eeff 0%,transparent 60%),radial-gradient(700px 400px at -8% 40%,#eaf3ff 0%,transparent 55%),linear-gradient(180deg,#f7faff,#fff)}
.hero .container{display:grid;grid-template-columns:1.04fr .96fr;gap:52px;align-items:center;padding:72px 0 84px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;color:#0c63e4;background:#fff;border:1px solid #d8e6ff;border-radius:999px;padding:7px 15px;margin-bottom:20px;box-shadow:0 4px 14px rgba(11,95,255,.1)}
.hero h1{font-size:clamp(31px,4.7vw,52px);line-height:1.22;font-weight:900;letter-spacing:.3px}
.hero h1 .grad-txt{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:17.5px;color:var(--mut);margin:18px 0 8px;max-width:560px}
.hero .ticks{display:flex;flex-wrap:wrap;gap:8px 20px;margin:18px 0 26px}
.hero .ticks li{color:#33415c;font-size:14.5px}
.hero .ticks b{color:#0c63e4}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.hero-note{font-size:12.5px;color:#8b99b0;margin-top:16px}
.hero-visual{position:relative}
.shot-window{border-radius:18px;overflow:hidden;box-shadow:0 30px 70px rgba(15,47,138,.2);border:1px solid #dbe7fb;background:#fff}
.shot-bar{display:flex;align-items:center;gap:7px;padding:11px 15px;background:#f2f6ff;border-bottom:1px solid #e2ebfb}
.shot-bar i{width:11px;height:11px;border-radius:50%;display:inline-block}
.shot-bar i:nth-child(1){background:#ff5f57}.shot-bar i:nth-child(2){background:#febc2e}.shot-bar i:nth-child(3){background:#28c840}
.shot-bar span{margin-left:auto;font-size:12px;color:#9aa7bf;font-family:Consolas,monospace}
.hero-float{position:absolute;left:-34px;bottom:-20px;background:#fff;border-radius:14px;box-shadow:var(--shadow);padding:14px 18px;display:flex;align-items:center;gap:12px;border:1px solid var(--line);animation:floaty 4s ease-in-out infinite}
.hero-float .f-ico{width:42px;height:42px;border-radius:12px;background:#eaf2ff;color:var(--c-main);display:flex;align-items:center;justify-content:center;font-size:21px;flex:none}
.hero-float b{display:block;font-size:14px;line-height:1.4}
.hero-float small{color:var(--mut);font-size:12px}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}/* 功能卡片 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:transform .25s,box-shadow .25s;position:relative;overflow:hidden}
.feat-card::before{content:"";position:absolute;inset:0 0 auto 0;height:4px;background:var(--grad);opacity:0;transition:.25s}
.feat-card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(15,47,138,.12)}
.feat-card:hover::before{opacity:1}
.feat-ico{width:54px;height:54px;border-radius:15px;display:flex;align-items:center;justify-content:center;font-size:27px;margin-bottom:18px;background:linear-gradient(135deg,#e9f1ff,#d9e8ff)}
.feat-card:nth-child(2) .feat-ico{background:linear-gradient(135deg,#eafaf3,#d4f3e4)}
.feat-card:nth-child(3) .feat-ico{background:linear-gradient(135deg,#fff3e8,#ffe1c4)}
.feat-card:nth-child(4) .feat-ico{background:linear-gradient(135deg,#f3ecff,#e2d6ff)}
.feat-card:nth-child(5) .feat-ico{background:linear-gradient(135deg,#e8f7fb,#cdeef7)}
.feat-card:nth-child(6) .feat-ico{background:linear-gradient(135deg,#fdeef4,#fbd2e2)}
.feat-card h3{font-size:18px;margin-bottom:8px;font-weight:800}
.feat-card p{color:var(--mut);font-size:14.5px}
/* 功能详解 */
.detail{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:26px 0 10px}
.detail+.detail{margin-top:10px}
.detail h3{font-size:clamp(21px,2.6vw,28px);font-weight:800;margin-bottom:14px;line-height:1.35}
.detail h3 em{font-style:normal;color:var(--c-main)}
.detail p{color:var(--mut);margin-bottom:14px;font-size:15.5px}
.detail ul.tick{display:grid;gap:9px}
.detail ul.tick li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:#2c3a55}
.tick i{flex:none;width:20px;height:20px;border-radius:50%;background:#e6f6ee;color:#14a05a;display:flex;align-items:center;justify-content:center;font-size:12px;margin-top:4px}
.detail .d-visual{order:2}
.detail:nth-of-type(even) .d-visual{order:1}
.detail:nth-of-type(even) .d-text{order:2}
.panel-shot{border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);background:#fff}
.panel-shot img{width:100%;height:auto}
.panel-cap{font-size:12.5px;color:var(--mut);text-align:center;padding:9px 12px;background:#fafcff;border-top:1px solid var(--line)}
/* 实拍展示 */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.g-item{border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#fff;transition:transform .25s,box-shadow .25s}
.g-item:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.g-item img{aspect-ratio:4/3;object-fit:cover;width:100%}
.g-item figcaption{padding:12px 14px}
.g-item figcaption b{font-size:14.5px}
.g-item figcaption span{display:block;font-size:12.5px;color:var(--mut);margin-top:2px}
/* 视频 */
.video-wrap{max-width:920px;margin:0 auto;border-radius:18px;overflow:hidden;border:1px solid var(--line);box-shadow:0 24px 60px rgba(15,47,138,.18)}
.video-wrap video{width:100%;display:block}
/* 价格 */
.price-banner{display:flex;align-items:center;justify-content:center;gap:10px;background:linear-gradient(90deg,#fff3e8,#ffe9d6);border:1px dashed #ffb380;color:#b45309;border-radius:12px;padding:12px 18px;margin-bottom:34px;font-weight:600;font-size:15px}
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:stretch}
.price-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px 26px;display:flex;flex-direction:column;position:relative;transition:transform .25s,box-shadow .25s}
.price-card:hover{transform:translateY(-6px);box-shadow:0 20px 46px rgba(15,47,138,.12)}
.price-card.hot{border:2px solid var(--c-main);box-shadow:0 18px 46px rgba(11,95,255,.16)}
.tag-hot{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12.5px;font-weight:700;padding:4px 14px;border-radius:999px;white-space:nowrap}
.p-name{font-size:17px;font-weight:800}
.p-desc{font-size:13px;color:var(--mut);margin:5px 0 16px;min-height:40px}
.price{display:flex;align-items:baseline;gap:8px;margin-bottom:18px}
.price .cur{font-size:18px;font-weight:800;color:var(--c-main)}
.price .num{font-size:42px;font-weight:900;color:var(--c-main);line-height:1}
.price .per{color:var(--mut);font-size:13.5px}
.price .old{color:#b6c2d6;text-decoration:line-through;font-size:15px;font-weight:500}
.p-list{display:grid;gap:10px;margin:6px 0 24px;flex:1}
.p-list li{position:relative;padding-left:26px;font-size:14.5px;color:#33415c}
.p-list li::before{content:"✓";position:absolute;left:0;top:0;color:#0fbf6d;font-weight:800}
.p-list li.no{opacity:.45;text-decoration:line-through}
.p-list li.no::before{content:"—";color:#a5b1c6}
.p-note{font-size:13px;color:var(--mut);text-align:center;margin-top:30px;line-height:1.9}
.p-note a{color:var(--c-main);font-weight:600}/* 演示 */
.demo-band{background:var(--grad);border-radius:26px;padding:52px 40px;color:#fff;position:relative;overflow:hidden}
.demo-band::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:rgba(255,255,255,.08);top:-180px;right:-120px}
.demo-band::after{content:"";position:absolute;width:260px;height:260px;border-radius:50%;background:rgba(255,255,255,.07);bottom:-120px;left:-60px}
.demo-band h3{font-size:clamp(22px,3vw,30px);font-weight:800;position:relative}
.demo-band>p{position:relative;opacity:.92;margin:10px 0 28px;font-size:15px}
.demo-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;position:relative}
.demo-card{background:#fff;color:var(--ink);border-radius:16px;padding:24px;box-shadow:0 16px 36px rgba(8,30,90,.22)}
.demo-card h4{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:800;margin-bottom:6px}
.demo-card .d-addr{font-size:13px;color:var(--mut);margin-bottom:14px;word-break:break-all}
.acc-row{display:flex;align-items:center;gap:12px;background:#f5f8ff;border:1px solid #e3ecfb;border-radius:11px;padding:10px 14px;margin-bottom:10px;font-size:14.5px;flex-wrap:wrap}
.acc-row b{color:var(--c-main);font-weight:700}
.acc-row code{background:#fff;border:1px solid #dbe6f7;border-radius:7px;padding:2px 10px;font-family:Consolas,Menlo,monospace;color:#0c3aa0;font-size:13.5px}
.demo-card .btn{margin-top:8px}
/* 为什么选我们 */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.why-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;text-align:center}
.why-card .n{width:64px;height:64px;margin:0 auto 14px;border-radius:18px;background:var(--grad);color:#fff;font-size:30px;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(11,95,255,.28)}
.why-card:nth-child(2) .n{background:linear-gradient(135deg,#17b26a,#0ea35e)}
.why-card:nth-child(3) .n{background:var(--grad2)}
.why-card h3{font-size:17px;font-weight:800;margin-bottom:8px}
.why-card p{font-size:14px;color:var(--mut)}
/* FAQ */
.faq{max-width:840px;margin:0 auto;display:grid;gap:12px}
.faq-item{border:1px solid var(--line);border-radius:14px;background:#fff;overflow:hidden;transition:box-shadow .2s}
.faq-item.open{box-shadow:var(--shadow);border-color:#c9dcff}
.faq-q{display:flex;align-items:center;gap:14px;padding:17px 20px;cursor:pointer;font-weight:700;font-size:15.5px;user-select:none;background:none;border:0;width:100%;text-align:left;color:var(--ink)}
.faq-q .q-num{flex:none;width:26px;height:26px;border-radius:8px;background:#e9f1ff;color:var(--c-main);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}
.faq-q .arr{margin-left:auto;transition:transform .25s;color:#9aa7bf;font-size:18px}
.faq-item.open .arr{transform:rotate(45deg)}
.faq-a{display:none;padding:2px 20px 18px 60px;color:var(--mut);font-size:14.5px}
.faq-item.open .faq-a{display:block}
/* 关于/联系 */
.about{display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:center}
.about h3{font-size:clamp(22px,3vw,30px);font-weight:800;margin-bottom:14px;line-height:1.4}
.about p{color:var(--mut);margin-bottom:12px;font-size:15.5px}
.contact-box{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:var(--shadow)}
.contact-box h4{font-size:18px;font-weight:800;margin-bottom:16px}
.contact-line{display:flex;align-items:flex-start;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:#33415c}
.contact-line:last-child{border-bottom:0}
.contact-line .ci{flex:none;width:38px;height:38px;border-radius:11px;background:#eef4ff;display:flex;align-items:center;justify-content:center;font-size:18px}
.contact-line b{display:block;font-size:13px;color:var(--mut);font-weight:600}
.contact-line a{color:var(--c-main);font-weight:800;font-size:20px}
/* footer */
.footer{background:#0d1b34;color:#9fb0cc;margin-top:70px}
.footer .container{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:26px 0;font-size:13.5px;flex-wrap:wrap}
.footer a{color:#c9d6ea}
.footer .fbrand{display:flex;align-items:center;gap:10px;color:#e7eefb;font-weight:800}
/* reveal 动画 */
.rv{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1);transition-delay:var(--d,0s)}
.rv.on{opacity:1;transform:none}
/* 移动端 */
.bottom-bar{display:none}
@media (max-width:960px){
  .hdr .container{height:58px}
  .nav{position:fixed;top:58px;left:0;right:0;background:#fff;flex-direction:column;gap:4px;padding:10px 6%;border-bottom:1px solid var(--line);transform:translateY(-140%);transition:transform .25s;box-shadow:0 16px 30px rgba(15,47,138,.12);margin:0}
  body.nav-open .nav{transform:none}
  .nav a{display:block;padding:11px 4px;font-size:16px;border-bottom:1px solid #f1f5fd}
  .burger{display:block}
  .hdr .actions .tel{display:none}
  .hero .container{grid-template-columns:1fr;padding:48px 0 58px;gap:40px}
  .hero-float{left:8px;bottom:-16px}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .detail{grid-template-columns:1fr;gap:30px}
  .detail:nth-of-type(even) .d-visual,.detail:nth-of-type(even) .d-text{order:0}
  .gallery{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr;max-width:460px;margin:0 auto}
  .why{grid-template-columns:1fr}
  .about{grid-template-columns:1fr;gap:34px}
  .demo-band{padding:40px 22px}
}
@media (max-width:640px){
  .section{padding:60px 0}
  .sec-head{margin-bottom:34px}
  .feat-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:1fr}
  .demo-grid{grid-template-columns:1fr}
  .bottom-bar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:90;background:#fff;border-top:1px solid var(--line);padding:10px 12px calc(10px + env(safe-area-inset-bottom));gap:10px;box-shadow:0 -6px 20px rgba(15,47,138,.08)}
  .bottom-bar .btn{flex:1;padding:12px 10px;font-size:14.5px}
  body{padding-bottom:64px}
}