/* ============================================
   沐辰智能遮阳清洗 · 官网样式
   设计基调：深色科技风 + 青蓝荧光 + 网格动效
   ============================================ */

@font-face{font-family:'fallback';src:local('PingFang SC');}

:root{
  --bg:#060d14;
  --bg-2:#0a1620;
  --panel:#0d1c28;
  --panel-2:#112534;
  --line:rgba(64,196,255,.14);
  --line-str:rgba(64,196,255,.30);
  --cy:#40c4ff;
  --cy-dim:#1a8fc4;
  --ac:#00e5c0;
  --ac-2:#0affd9;
  --warn:#ffb648;
  --txt:#d8e8f2;
  --txt-2:#8ba6b8;
  --txt-3:#5a7488;
  --glow:0 0 24px rgba(64,196,255,.28);
  --glow-ac:0 0 28px rgba(0,229,192,.30);
  --r:14px;
  --ease:cubic-bezier(.22,.9,.3,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:74px}
body{
  font-family:'PingFang SC','Microsoft YaHei','Noto Sans SC','Source Han Sans SC','Hiragino Sans GB','WenQuanYi Micro Hei',system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;
  background:var(--bg);color:var(--txt);line-height:1.75;
  overflow-x:hidden;-webkit-font-smoothing:antialiased;
}
body::before{
  content:'';position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(ellipse 900px 600px at 15% -5%,rgba(0,229,192,.13),transparent 60%),
    radial-gradient(ellipse 800px 600px at 85% 10%,rgba(64,196,255,.13),transparent 60%),
    radial-gradient(ellipse 700px 500px at 50% 100%,rgba(64,196,255,.07),transparent 60%),
    var(--bg);
}
body::after{
  content:'';position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(rgba(64,196,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(64,196,255,.045) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 30%,#000 30%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 30%,#000 30%,transparent 75%);
  animation:grid 24s linear infinite;
}
@keyframes grid{to{background-position:56px 56px,56px 56px}}

::selection{background:rgba(0,229,192,.28);color:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
input,select,textarea{font-family:inherit}

/* 滚动条 */
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-track{background:var(--bg-2)}
::-webkit-scrollbar-thumb{background:linear-gradient(var(--cy-dim),var(--cy));
  border-radius:9px}
::-webkit-scrollbar-thumb:hover{background:var(--cy)}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

/* ========== 导航 ========== */
header{position:fixed;top:0;left:0;right:0;z-index:200;
  background:rgba(6,13,20,.80);backdrop-filter:blur(20px) saturate(160%);
  border-bottom:1px solid var(--line);transition:.35s}
header.scrolled{background:rgba(6,13,20,.95);box-shadow:0 6px 30px rgba(0,0,0,.45)}
.nav{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;gap:11px;font-size:19.5px;font-weight:800;letter-spacing:.5px}
.logo-mark{width:38px;height:38px;border-radius:10px;position:relative;flex-shrink:0;
  background:linear-gradient(135deg,var(--ac),var(--cy));display:grid;place-items:center;
  font-size:19px;color:#04121a;font-weight:900;box-shadow:var(--glow-ac)}
.logo-mark::after{content:'';position:absolute;inset:-4px;border-radius:13px;
  border:1px solid rgba(0,229,192,.4);animation:rot 8s linear infinite}
@keyframes rot{to{transform:rotate(360deg)}}
.logo small{display:block;font-size:10.5px;font-weight:500;color:var(--txt-3);
  letter-spacing:2px;margin-top:-2px}
.nav-links{display:flex;align-items:center;gap:34px}
.nav-links a{font-size:14.8px;color:var(--txt-2);transition:.25s;position:relative}
.nav-links a::after{content:'';position:absolute;bottom:-7px;left:50%;width:0;height:2px;
  background:linear-gradient(90deg,var(--ac),var(--cy));transform:translateX(-50%);
  transition:.3s var(--ease);border-radius:2px}
.nav-links a:hover{color:var(--cy)}
.nav-links a:hover::after{width:100%}
.btn-nav{background:linear-gradient(135deg,var(--ac),var(--cy))!important;color:#04121a!important;
  padding:10px 24px;border-radius:9px;font-weight:700;font-size:15px;
  box-shadow:0 4px 18px rgba(0,229,192,.3);transition:.28s var(--ease)}
.btn-nav:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(0,229,192,.45)}
.btn-nav::after{display:none!important}
.menu-btn{display:none;font-size:25px;color:var(--cy);cursor:pointer;padding:5px}

/* ========== Hero ========== */
.hero{padding:158px 0 132px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:64px;align-items:center}
.badge{display:inline-flex;align-items:center;gap:9px;background:rgba(0,229,192,.09);
  border:1px solid rgba(0,229,192,.32);color:var(--ac);font-size:13px;font-weight:600;
  padding:7px 17px;border-radius:100px;margin-bottom:26px;letter-spacing:.5px}
.badge i{width:6px;height:6px;background:var(--ac);border-radius:50%;
  box-shadow:0 0 10px var(--ac);animation:blink 1.8s ease-in-out infinite}
@keyframes blink{0%,100%{opacity:1}50%{opacity:.25}}

.hero h1{font-size:clamp(34px,4.6vw,52px);line-height:1.22;font-weight:800;
  margin-bottom:24px;letter-spacing:-1px}
.hero h1 span{background:linear-gradient(100deg,var(--ac),var(--cy) 60%,#7ddcff);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
  filter:drop-shadow(0 0 22px rgba(0,229,192,.32))}
.hero-sub{font-size:16.5px;color:var(--txt-2);max-width:540px;margin-bottom:34px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:38px}
.hero-tags span{background:rgba(64,196,255,.06);border:1px solid var(--line);
  padding:7px 15px;border-radius:8px;font-size:13.2px;color:var(--txt-2);
  transition:.25s}
.hero-tags span:hover{border-color:var(--cy);color:var(--cy);transform:translateY(-2px)}
.hero-cta{display:flex;gap:15px;flex-wrap:wrap}
.btn{padding:14px 34px;border-radius:10px;font-size:15.5px;font-weight:700;
  transition:.3s var(--ease);display:inline-flex;align-items:center;gap:9px;
  cursor:pointer;border:1px solid transparent}
.btn-p{background:linear-gradient(135deg,var(--ac),var(--cy));color:#04121a;
  box-shadow:0 6px 24px rgba(0,229,192,.32)}
.btn-p:hover{transform:translateY(-3px);box-shadow:0 12px 34px rgba(0,229,192,.46)}
.btn-s{background:rgba(64,196,255,.07);border-color:var(--line-str);color:var(--cy)}
.btn-s:hover{background:rgba(64,196,255,.14);transform:translateY(-3px)}

/* Hero 可视化：玻璃屋顶 + 设备 */
.holo{position:relative;height:400px;display:grid;place-items:center}
.holo-ring{position:absolute;width:330px;height:330px;border-radius:50%;
  border:1px solid rgba(64,196,255,.18);animation:spin 22s linear infinite}
.holo-ring::before{content:'';position:absolute;top:-3px;left:50%;width:6px;height:6px;
  border-radius:50%;background:var(--ac);box-shadow:0 0 14px var(--ac)}
.holo-ring.r2{width:400px;height:400px;border-style:dashed;
  border-color:rgba(0,229,192,.13);animation-duration:34s;animation-direction:reverse}
.holo-ring.r3{width:470px;height:470px;border-color:rgba(64,196,255,.07);
  animation-duration:48s}
@keyframes spin{to{transform:rotate(360deg)}}

.dome{position:relative;width:300px;height:150px;
  transform:perspective(620px) rotateX(62deg);
  background:linear-gradient(150deg,rgba(64,196,255,.22),rgba(0,229,192,.06));
  border:1.5px solid rgba(64,196,255,.45);border-radius:8px;overflow:hidden;
  box-shadow:0 0 60px rgba(64,196,255,.22),inset 0 0 40px rgba(0,229,192,.09)}
.dome::before{content:'';position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(64,196,255,.28) 1px,transparent 1px) 0 0/30px 30px,
    linear-gradient(0deg,rgba(64,196,255,.28) 1px,transparent 1px) 0 0/30px 30px}
.dome::after{content:'';position:absolute;inset:0;
  background:linear-gradient(115deg,transparent 42%,rgba(255,255,255,.13) 50%,transparent 58%);
  animation:sheen 4.5s ease-in-out infinite}
@keyframes sheen{0%,100%{transform:translateX(-100%)}50%{transform:translateX(100%)}}

.bot{position:absolute;width:52px;height:40px;border-radius:10px;
  background:linear-gradient(135deg,var(--ac),var(--cy-dim));
  box-shadow:0 0 28px rgba(0,229,192,.6);animation:run 6s ease-in-out infinite;
  display:grid;place-items:center;font-size:19px}
.bot::after{content:'';position:absolute;bottom:-10px;left:50%;transform:translateX(-50%);
  width:24px;height:12px;background:rgba(0,0,0,.45);border-radius:0 0 6px 6px}
@keyframes run{0%,100%{top:8%;left:8%}50%{top:66%;left:76%}}
.jet{position:absolute;width:44px;height:44px;border-radius:50%;
  background:radial-gradient(circle,rgba(0,229,192,.5),transparent 68%);
  animation:jet 6s ease-in-out infinite}
@keyframes jet{0%,100%{opacity:0}35%,60%{opacity:.9}}

.holo-float{position:absolute;font-size:12px;color:var(--cy);background:rgba(6,13,20,.85);
  border:1px solid var(--line-str);padding:6px 13px;border-radius:8px;white-space:nowrap;
  backdrop-filter:blur(8px);box-shadow:0 0 20px rgba(0,0,0,.5)}
.f1{top:8%;left:2%;animation:fl 4s ease-in-out infinite}
.f2{top:52%;right:-2%;animation:fl 4s ease-in-out .8s infinite}
.f3{bottom:6%;left:16%;animation:fl 4s ease-in-out 1.6s infinite}
@keyframes fl{0%,100%{transform:translateY(0)}50%{transform:translateY(-11px)}}

/* 滚动提示 */
.scroll{display:none}

/* ========== 通用区块 ========== */
section{padding:96px 0;position:relative}
.alt{background:linear-gradient(180deg,transparent,rgba(10,22,32,.65),transparent)}
.sec-head{text-align:center;max-width:720px;margin:0 auto 58px}
.sec-tag{display:inline-flex;align-items:center;gap:8px;color:var(--ac);font-size:13px;
  font-weight:700;letter-spacing:3px;margin-bottom:14px;text-transform:uppercase}
.sec-tag::before,.sec-tag::after{content:'';width:22px;height:1px;background:var(--line-str)}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;margin-bottom:16px;letter-spacing:-.5px}
.sec-head h2 em{font-style:normal;background:linear-gradient(100deg,var(--ac),var(--cy));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.sec-head p{color:var(--txt-2);font-size:16px}
.divider{height:1px;background:linear-gradient(90deg,transparent,var(--line-str),transparent)}

/* 数据条 */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:-38px;
  position:relative;z-index:5}
.stat{background:rgba(13,28,40,.75);backdrop-filter:blur(14px);border-radius:var(--r);
  padding:30px 20px;text-align:center;border:1px solid var(--line);
  transition:.35s var(--ease);position:relative;overflow:hidden}
.stat::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;
  background:linear-gradient(90deg,transparent,var(--cy),transparent);
  opacity:0;transition:.35s}
.stat:hover{transform:translateY(-6px);border-color:var(--line-str);box-shadow:var(--glow)}
.stat:hover::before{opacity:1}
.stat-num{font-size:38px;font-weight:800;line-height:1.1;
  background:linear-gradient(120deg,var(--ac),var(--cy));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat-num small{font-size:17px;margin-left:2px}
.stat-lbl{color:var(--txt-3);font-size:14px;margin-top:8px}

/* 产品卡 */
.p-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.p-card{background:rgba(13,28,40,.62);border-radius:var(--r);border:1px solid var(--line);
  overflow:hidden;transition:.4s var(--ease);display:flex;flex-direction:column;
  backdrop-filter:blur(10px);position:relative}
.p-card:hover{transform:translateY(-9px);border-color:var(--cy);
  box-shadow:0 22px 50px rgba(0,0,0,.5),0 0 32px rgba(64,196,255,.16)}
.p-vis{height:196px;position:relative;background:
  radial-gradient(circle at 50% 40%,rgba(64,196,255,.11),transparent 68%);
  border-bottom:1px solid var(--line);overflow:hidden}
.p-vis svg{width:100%;height:100%}
.p-badge{position:absolute;top:14px;left:14px;font-size:11.5px;font-weight:700;
  padding:5px 12px;border-radius:100px;letter-spacing:1px;
  background:rgba(0,229,192,.13);border:1px solid rgba(0,229,192,.4);color:var(--ac)}
.p-body{padding:26px;flex:1;display:flex;flex-direction:column}
.p-body h3{font-size:20px;font-weight:700;margin-bottom:10px;letter-spacing:.5px}
.p-body>p{color:var(--txt-2);font-size:14.5px;margin-bottom:18px;flex:1}
.p-list{list-style:none;display:flex;flex-direction:column;gap:9px;margin-bottom:20px}
.p-list li{font-size:14px;padding-left:25px;position:relative;line-height:1.6;color:var(--txt)}
.p-list li::before{content:'';position:absolute;left:4px;top:8px;width:8px;height:8px;
  border-radius:50%;background:var(--ac);box-shadow:0 0 8px var(--ac)}
.p-foot{margin-top:auto;padding-top:16px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  color:var(--cy);font-size:14px;font-weight:600}
.p-foot span:last-child{transition:.3s}
.p-card:hover .p-foot span:last-child{transform:translateX(5px)}

/* 场景 */
.sc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.sc-card{background:rgba(13,28,40,.55);border-radius:var(--r);padding:30px 24px;
  border:1px solid var(--line);transition:.4s var(--ease);text-align:center}
.sc-card:hover{transform:translateY(-8px);border-color:var(--cy);box-shadow:var(--glow)}
.sc-ico{width:58px;height:58px;margin:0 auto 18px;border-radius:15px;font-size:27px;
  background:linear-gradient(135deg,rgba(0,229,192,.14),rgba(64,196,255,.10));
  border:1px solid var(--line-str);display:grid;place-items:center}
.sc-card h4{font-size:18px;font-weight:700;margin-bottom:10px;letter-spacing:.5px}
.sc-card p{color:var(--txt-3);font-size:14px}

/* 优势 */
.adv-wrap{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.adv-list{display:flex;flex-direction:column;gap:18px}
.adv{background:rgba(13,28,40,.6);border:1px solid var(--line);border-radius:12px;
  padding:22px 24px;transition:.35s var(--ease);position:relative;overflow:hidden}
.adv::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(var(--ac),var(--cy));transform:scaleY(0);transition:.35s var(--ease)}
.adv:hover{border-color:var(--line-str);transform:translateX(8px);background:rgba(13,28,40,.85)}
.adv:hover::before{transform:scaleY(1)}
.adv h4{font-size:17.5px;font-weight:700;margin-bottom:8px;display:flex;align-items:center;gap:10px}
.adv h4 b{color:var(--ac);font-size:13px;font-family:monospace;opacity:.65}
.adv p{color:var(--txt-2);font-size:14.5px}

.adv-fig{background:rgba(13,28,40,.5);border-radius:var(--r);padding:40px;
  border:1px solid var(--line);position:relative}
.adv-fig svg{width:100%;height:auto}

/* 加盟 */
.fr-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.fr-card{background:rgba(13,28,40,.62);border:1.5px solid var(--line);border-radius:var(--r);
  padding:34px 28px;transition:.4s var(--ease);position:relative;backdrop-filter:blur(10px)}
.fr-card:hover{transform:translateY(-8px);border-color:var(--cy);box-shadow:var(--glow)}
.fr-card.hot{border-color:rgba(0,229,192,.45);
  background:linear-gradient(180deg,rgba(0,229,192,.07),rgba(13,28,40,.72))}
.fr-tag{position:absolute;top:-1px;right:22px;background:linear-gradient(135deg,var(--ac),var(--cy));
  color:#04121a;font-size:11.5px;font-weight:800;padding:6px 16px;border-radius:0 0 10px 10px;
  letter-spacing:1px}
.fr-card h3{font-size:21px;font-weight:800;margin-bottom:6px;letter-spacing:.5px}
.fr-sub{color:var(--txt-3);font-size:13.5px;margin-bottom:22px}
.fr-price{display:flex;align-items:baseline;gap:7px;padding:20px 0;margin-bottom:22px;
  border-top:1px dashed var(--line-str);border-bottom:1px dashed var(--line-str)}
.fr-price .amt{font-size:31px;font-weight:800;
  background:linear-gradient(120deg,var(--ac),var(--cy));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.fr-price .unit{color:var(--txt-3);font-size:14px}
.fr-list{list-style:none;display:flex;flex-direction:column;gap:12px}
.fr-list li{font-size:14.2px;padding-left:27px;position:relative;line-height:1.6}
.fr-list li::before{content:'▸';position:absolute;left:8px;color:var(--ac);font-weight:800}
.fr-list li.no{color:var(--txt-3)}
.fr-list li.no::before{content:'×';color:#3d5566}

.sup-wrap{margin-top:56px;background:rgba(13,28,40,.55);border-radius:var(--r);
  padding:36px;border:1px solid var(--line)}
.sup-wrap h4{font-size:18px;font-weight:700;margin-bottom:8px;text-align:center}
.sup-wrap h4 span{color:var(--ac);font-family:monospace;font-size:14px;margin-right:9px}
.sup-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
.sup{display:flex;align-items:center;gap:11px;background:rgba(64,196,255,.04);
  border:1px solid var(--line);border-radius:10px;padding:15px 17px;
  font-size:14.2px;transition:.3s}
.sup:hover{border-color:var(--cy);background:rgba(64,196,255,.09);transform:translateY(-2px)}
.sup i{color:var(--ac);font-style:normal;font-size:16px}

.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin-top:26px}
.step{background:rgba(13,28,40,.55);border:1px solid var(--line);border-radius:var(--r);
  padding:28px 16px;text-align:center;position:relative;transition:.35s}
.step:hover{border-color:var(--cy);transform:translateY(-5px)}
.step-n{width:44px;height:44px;margin:0 auto 15px;border-radius:50%;font-size:17px;
  font-weight:800;display:grid;place-items:center;color:#04121a;
  background:linear-gradient(135deg,var(--ac),var(--cy));box-shadow:0 0 20px rgba(0,229,192,.34)}
.step h4{font-size:15.5px;font-weight:700;margin-bottom:7px}
.step p{color:var(--txt-3);font-size:13px;line-height:1.6}
.step::after{content:'▸';position:absolute;right:-13px;top:50%;transform:translateY(-50%);
  color:var(--cy);font-size:17px;z-index:2}
.step:last-child::after{display:none}

/* FAQ */
.faq-wrap{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;max-width:1000px;
  margin:0 auto}
.faq{background:rgba(13,28,40,.55);border:1px solid var(--line);border-radius:12px;
  overflow:hidden;transition:.32s}
.faq:hover{border-color:var(--line-str)}
.faq-q{padding:19px 22px;font-size:15.5px;font-weight:600;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:14px;user-select:none}
.faq-q i{color:var(--cy);font-style:normal;font-size:19px;transition:.35s var(--ease);
  flex-shrink:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.faq-a p{padding:0 22px 20px;color:var(--txt-2);font-size:14.3px;line-height:1.8}
.faq.open .faq-a{max-height:280px}
.faq.open .faq-q i{transform:rotate(135deg);color:var(--ac)}
.faq.open{border-color:rgba(0,229,192,.32);background:rgba(0,229,192,.04)}

/* 表单 + 联系 */
.form-wrap{display:grid;grid-template-columns:1fr 1.2fr;gap:48px;align-items:start}
.form-side h3{font-size:27px;font-weight:800;margin-bottom:14px;letter-spacing:-.3px}
.form-side>p{color:var(--txt-2);margin-bottom:30px;font-size:15.3px}
.ct{display:flex;gap:16px;margin-bottom:22px;align-items:flex-start}
.c-ico{width:48px;height:48px;border-radius:12px;flex-shrink:0;font-size:22px;
  background:linear-gradient(135deg,rgba(0,229,192,.13),rgba(64,196,255,.09));
  border:1px solid var(--line-str);display:grid;place-items:center}
.ct h5{font-size:15.5px;font-weight:700;margin-bottom:4px;letter-spacing:.5px}
.ct p{color:var(--txt-3);font-size:14px;font-family:monospace;letter-spacing:.5px}
.wx-card{margin-top:28px;background:linear-gradient(140deg,rgba(0,229,192,.12),
  rgba(64,196,255,.07));border:1px solid var(--line-str);border-radius:var(--r);
  padding:24px;display:flex;gap:20px;align-items:center}
.wx-qr{width:104px;height:104px;border-radius:12px;flex-shrink:0;
  background:rgba(255,255,255,.94);display:grid;place-items:center;padding:8px;
  color:#5a7488;font-size:11.5px;text-align:center;line-height:1.4;cursor:pointer;
  transition:.3s;position:relative;overflow:hidden}
.wx-qr:hover{transform:scale(1.05)}
.wx-qr input{position:absolute;inset:0;opacity:0;cursor:pointer}
.wx-qr img{width:100%;height:100%;object-fit:contain;border-radius:6px}
.wx-card h5{font-size:17px;font-weight:700;margin-bottom:6px}
.wx-card p{font-size:13.5px;color:var(--txt-2);line-height:1.7}
.wx-card code{color:var(--ac);font-family:monospace;font-size:15px;letter-spacing:1px}

form{background:rgba(13,28,40,.72);border-radius:var(--r);padding:36px;
  border:1px solid var(--line);backdrop-filter:blur(14px)}
.f-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.f-g{margin-bottom:19px}
.f-g label{display:block;font-size:14.3px;font-weight:600;margin-bottom:9px;color:var(--txt)}
.f-g label em{font-style:normal;color:#ff6b6b;margin-left:4px}
.f-g input,.f-g select,.f-g textarea{width:100%;padding:13px 16px;font-size:15px;
  border:1.5px solid var(--line);border-radius:10px;background:rgba(6,13,20,.65);
  color:var(--txt);transition:.28s}
.f-g input::placeholder,.f-g textarea::placeholder{color:#3f5a6b}
.f-g input:focus,.f-g select:focus,.f-g textarea:focus{outline:none;
  border-color:var(--cy);box-shadow:0 0 0 3.5px rgba(64,196,255,.13);background:rgba(6,13,20,.9)}
.f-g select{cursor:pointer;appearance:none;
  background-image:linear-gradient(45deg,transparent 50%,var(--cy) 50%),
                   linear-gradient(135deg,var(--cy) 50%,transparent 50%);
  background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;
  background-size:5px 5px;background-repeat:no-repeat}
.f-g select option{background:#0a1620;color:var(--txt)}
.f-g textarea{resize:vertical;min-height:100px;font-family:inherit}
.f-e{color:#ff6b6b;font-size:12.8px;margin-top:7px;display:none}
.f-g.err input,.f-g.err select,.f-g.err textarea{border-color:#ff6b6b;
  box-shadow:0 0 0 3px rgba(255,107,107,.1)}
.f-g.err .f-e{display:block}
.f-check{display:flex;align-items:flex-start;gap:11px;margin-bottom:24px;
  font-size:13.3px;color:var(--txt-3);line-height:1.65}
.f-check input{width:auto;margin-top:4px;accent-color:var(--ac);flex-shrink:0}
.f-sub{width:100%;justify-content:center;padding:16px;font-size:16.5px}
.f-done{display:none;text-align:center;padding:44px 20px}
.f-done.show{display:block;animation:pop .5s var(--ease)}
@keyframes pop{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}
.f-done .ico{font-size:52px;margin-bottom:16px;
  background:linear-gradient(135deg,var(--ac),var(--cy));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.f-done h4{font-size:21px;font-weight:700;margin-bottom:10px}
.f-done p{color:var(--txt-2);font-size:14.5px;margin-bottom:22px}
.f-done .btn{margin:0 auto}

/* CTA */
.cta{background:linear-gradient(140deg,rgba(0,229,192,.10),rgba(64,196,255,.06));
  border:1px solid var(--line-str);border-radius:20px;padding:52px 40px;text-align:center;
  position:relative;overflow:hidden}
.cta::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;
  background:conic-gradient(from 0deg,transparent,rgba(0,229,192,.06),transparent 40%);
  animation:spin 12s linear infinite}
.cta>*{position:relative;z-index:2}
.cta h2{font-size:clamp(24px,3.2vw,34px);font-weight:800;margin-bottom:14px;letter-spacing:-.5px}
.cta p{color:var(--txt-2);font-size:16px;margin-bottom:30px}

/* Footer */
footer{background:rgba(6,13,20,.75);border-top:1px solid var(--line);
  padding:56px 0 26px;margin-top:40px}
.f-top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:44px;margin-bottom:40px}
.f-brand p{color:var(--txt-3);font-size:14px;margin-top:16px;max-width:290px;line-height:1.8}
.f-col h5{font-size:14.5px;font-weight:700;margin-bottom:16px;letter-spacing:1px;
  color:var(--txt)}
.f-col a,.f-col p{display:block;color:var(--txt-3);font-size:13.8px;margin-bottom:11px;
  transition:.25s}
.f-col a:hover{color:var(--cy);transform:translateX(3px)}
.f-bot{padding-top:22px;border-top:1px solid var(--line);display:flex;
  justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;
  color:var(--txt-3);font-size:13px}
.f-bot a{color:var(--txt-3)}
.f-bot a:hover{color:var(--cy)}

/* 返回顶部 */
.top{position:fixed;right:26px;bottom:26px;width:46px;height:46px;border-radius:12px;
  background:rgba(13,28,40,.9);border:1px solid var(--line-str);color:var(--cy);
  font-size:19px;display:grid;place-items:center;cursor:pointer;z-index:150;
  opacity:0;visibility:hidden;transition:.35s;backdrop-filter:blur(10px)}
.top.show{opacity:1;visibility:visible}
.top:hover{background:rgba(0,229,192,.16);box-shadow:var(--glow-ac)}

/* 进场动画 */
.rv{opacity:0;transform:translateY(34px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.rv.in{opacity:1;transform:none}

/* 吐司 */
.toast{position:fixed;top:88px;left:50%;transform:translateX(-50%) translateY(-24px);
  background:rgba(13,28,40,.96);border:1px solid var(--line-str);color:var(--txt);
  padding:13px 26px;border-radius:11px;font-size:14.5px;z-index:400;opacity:0;
  pointer-events:none;transition:.35s;backdrop-filter:blur(14px);box-shadow:var(--glow)}
.toast.show{opacity:1;transform:translateX(-50%)}
.toast.ok{border-color:rgba(0,229,192,.45);color:var(--ac)}
.toast.err{border-color:rgba(255,107,107,.45);color:#ff6b6b}

/* ========== 响应式 ========== */
@media(max-width:1000px){
  .hero{padding-top:120px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .holo{height:320px;width:100%;overflow:hidden}
  .holo-ring{width:270px;height:270px}
  .holo-ring.r2{width:325px;height:325px}
  .holo-ring.r3{width:380px;height:380px}
  .dome{width:250px;height:125px}
  .stats{grid-template-columns:repeat(2,1fr);margin-top:-34px}
  .p-grid,.fr-grid{grid-template-columns:1fr}
  .sc-grid{grid-template-columns:repeat(2,1fr)}
  .adv-wrap,.form-wrap{grid-template-columns:1fr;gap:40px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step::after{display:none!important}
  .sup-grid{grid-template-columns:1fr}
  .faq-wrap{grid-template-columns:1fr}
  .f-top{grid-template-columns:1fr 1fr;gap:32px}
}
@media(max-width:760px){
  .nav-links{position:fixed;top:70px;left:0;right:0;background:rgba(6,13,20,.98);
    backdrop-filter:blur(20px);flex-direction:column;gap:0;padding:14px 24px 22px;
    border-bottom:1px solid var(--line);max-height:0;overflow:hidden;transition:.38s var(--ease)}
  .nav-links.open{max-height:420px}
  .nav-links a{padding:13px 0;width:100%;border-bottom:1px solid var(--line);font-size:15.5px}
  .nav-links a::after{display:none}
  .nav-links .btn-nav{margin-top:16px;text-align:center;width:100%}
  .menu-btn{display:block}
  section{padding:70px 0}
  /* Hero 顶部留出固定导航高度，避免标题被遮 */
  .hero{padding:112px 0 76px}
  .hero h1{font-size:30px;margin-bottom:18px}
  .hero-sub{font-size:15px;margin-bottom:26px}
  /* 环形轨道缩进容器内，避免横向溢出 */
  .holo{height:250px;width:100%;overflow:hidden}
  .holo-ring{width:220px;height:220px}
  .holo-ring.r2{width:265px;height:265px}
  .holo-ring.r3{width:310px;height:310px}
  .dome{width:210px;height:105px}
  .bot{width:42px;height:32px;font-size:16px}
  .jet{width:34px;height:34px}
  .holo-float{font-size:10.5px;padding:5px 10px}
  .f1{top:6%;left:0}
  .f2{top:48%;right:0}
  .f3{bottom:4%;left:8%}
  .stats{grid-template-columns:1fr}
  .sc-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .f-row{grid-template-columns:1fr}
  form{padding:26px 20px}
  .cta{padding:38px 22px}
  .f-top{grid-template-columns:1fr}
  .top{right:16px;bottom:16px;width:42px;height:42px}
}