/* ============ FLYTEQ 自有设计 · 阳光欧美风（纯白 + 暖沙 + 阳光橙 + 活力蓝 + 海军蓝） ============ */
:root{
  --bg:#ffffff; --bg2:#eef4fb; --panel:#ffffff; --panel2:#f4f8fd;
  --line:rgba(16,24,40,.10); --line2:rgba(16,24,40,.20);
  --txt:#101828; --mut:#5b6572;
  --org:#ff7a00; --org2:#ff9433; --olv:#0a6cf1; --olv2:#0a58c8;
  --maxw:1200px; --rad:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
html,body{overflow-x:clip}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--txt);font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
/* ---------- 头部 ---------- */
.hd{position:fixed;inset:0 0 auto 0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.hd-in{display:flex;align-items:center;gap:28px;height:70px}
.brand{display:flex;align-items:baseline;gap:2px;font-size:27px;font-weight:900;letter-spacing:.06em}
.brand i{font-style:normal;color:var(--org)}
.brand small{font-size:11px;font-weight:700;letter-spacing:.34em;color:var(--mut);margin-left:10px}
.ft .brand{color:#fff}
.ft .brand small{color:#8fa0b5}
.ft .brand i{color:var(--org2)}
.nav{display:flex;gap:26px;margin-left:auto}
.nav a{font-size:14px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--mut);padding:6px 0;border-bottom:2px solid transparent;transition:.2s}
.nav a:hover,.nav a.on{color:var(--txt);border-bottom-color:var(--org)}
.hd-lang{border:1px solid var(--line2);background:transparent;color:var(--txt);font-size:12px;letter-spacing:.08em;text-transform:uppercase;padding:7px 10px;border-radius:8px;cursor:pointer}
.hd-lang option{color:#111;background:#fff}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;margin-left:auto}
.burger span{width:24px;height:2px;background:var(--txt)}
.drawer{display:none}
/* ---------- Hero 轮播 ---------- */
.hero{position:relative;height:100vh;height:100svh;min-height:580px;overflow:hidden;background:var(--bg2)}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .9s ease;background-size:cover;background-position:center}
.slide.on{opacity:1}
.slide::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,12,13,.86) 0%,rgba(10,12,13,.55) 42%,rgba(10,12,13,.08) 75%)}
.hero-in{position:relative;z-index:2;height:100%;display:flex;align-items:center}
.hero-txt{max-width:640px;padding:90px 0 70px}
.kick{display:inline-flex;align-items:center;gap:12px;font-size:15px;font-weight:800;letter-spacing:.26em;text-transform:uppercase;color:var(--org2)}
.kick::before{content:"";width:34px;height:2px;background:var(--org)}
.hero-txt h1{font-size:clamp(46px,7.2vw,88px);font-weight:900;line-height:1.04;letter-spacing:-.015em;margin:20px 0 18px;text-wrap:balance;color:#fff}
.hero-txt p{font-size:clamp(17px,1.9vw,21px);color:#e2e9f2;max-width:560px}
.hero-btns{display:flex;gap:16px;margin-top:38px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:10px;background:var(--org);color:#fff;font-size:15px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;padding:18px 34px;border-radius:10px;transition:.2s;border:1px solid var(--org);white-space:nowrap}
.btn:hover{background:var(--org2);border-color:var(--org2);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff}
.arr{position:absolute;top:50%;transform:translateY(-50%);z-index:3;width:52px;height:52px;border-radius:50%;border:1px solid rgba(255,255,255,.35);background:rgba(13,16,18,.45);color:#fff;font-size:19px;cursor:pointer;transition:.2s;display:flex;align-items:center;justify-content:center}
.arr:hover{background:var(--org);border-color:var(--org);color:#fff}
.arr-l{left:26px}.arr-r{right:26px}
/* ---------- 焦点/激活态 ---------- */
a:focus-visible,button:focus-visible,select:focus-visible{outline:2px solid var(--olv);outline-offset:2px}
.btn:focus-visible,.arr:focus-visible,.burger:focus-visible,.hd-lang:focus-visible{outline-offset:3px}
.btn:active{transform:translateY(0)}
.arr:active{background:var(--olv);border-color:var(--olv)}
.nav a:active{color:var(--txt)}
.drawer a:active{color:var(--org)}
.p-card:active,.s-card:active,.m-card:active,.sup a:active{transform:translateY(-1px)}
/* ---------- 通用区块 ---------- */
.sec{padding:104px 0}
.sec-head{margin-bottom:52px}
.sec-head h2{font-size:clamp(34px,4.6vw,58px);font-weight:900;letter-spacing:-.015em;margin-top:14px}
.sec-head p{color:var(--mut);font-size:18px;max-width:640px;margin-top:12px}
.sec-head .kick{font-size:14px}
.sec-alt{background:var(--bg2)}
/* ---------- 系列入口 ---------- */
.series{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.s-card{position:relative;background:var(--panel);border:1px solid var(--line);border-top:4px solid var(--olv);border-radius:var(--rad);padding:34px 28px 30px;transition:.25s;overflow:hidden}
.s-card:hover{border-color:var(--line2);border-top-color:var(--org);transform:translateY(-4px)}
.s-card h3{font-size:24px;font-weight:900;text-transform:uppercase;letter-spacing:.03em}
.s-card p{color:var(--mut);font-size:16px;margin-top:8px}
.s-card .go{position:absolute;right:22px;bottom:20px;color:var(--org);font-size:24px;transition:.2s}
.s-card:hover .go{transform:translateX(5px)}
.s-card .num{position:absolute;top:20px;right:24px;font-size:14px;font-weight:800;letter-spacing:.14em;color:var(--olv2)}
/* ---------- 产品网格 ---------- */
.p-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.p-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--rad);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.p-card:hover{border-color:var(--line2);transform:translateY(-4px)}
.p-img{position:relative;background:#f6f7f9;aspect-ratio:1}
.p-img img{width:100%;height:100%;object-fit:cover}
.p-tag{position:absolute;top:12px;left:12px;background:rgba(255,255,255,.92);color:var(--olv);font-size:12px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;padding:6px 12px;border-radius:6px}
.p-info{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.p-info h3{font-size:17px;font-weight:700;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:48px}
.p-price{color:var(--org);font-size:22px;font-weight:900;margin-top:auto}
.p-price del{margin-right:6px;color:var(--mut);font-weight:500;font-size:15px}
.p-more{display:flex;justify-content:center;margin-top:38px}
/* ---------- 特性带 ---------- */
.feats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feat{display:flex;gap:18px;align-items:flex-start;background:var(--panel);border:1px solid var(--line);border-radius:var(--rad);padding:28px}
.feat svg{flex:none;width:40px;height:40px;color:var(--olv)}
.feat h3{font-size:18px;font-weight:800}
.feat p{color:var(--mut);font-size:15px;margin-top:6px}
/* ---------- 品牌故事 ---------- */
.story{position:relative;min-height:500px;display:flex;align-items:center;background:#0e1b2e center/cover fixed}
.story::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,19,33,.92) 0%,rgba(11,19,33,.6) 48%,rgba(11,19,33,.12) 100%)}
.story-in{position:relative;z-index:2;max-width:560px;padding:90px 0}
.story h2{font-size:clamp(34px,4.6vw,60px);font-weight:900;margin-top:14px;color:#fff}
.story p{color:#d6dee8;margin-top:16px;font-size:18px}
/* ---------- 手册入口 ---------- */
.m-cards{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.m-card{display:flex;gap:22px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:var(--rad);padding:34px 30px;transition:.25s}
.m-card:hover{border-color:var(--org);transform:translateY(-4px)}
.m-ico{flex:none;width:64px;height:64px;border-radius:16px;display:flex;align-items:center;justify-content:center;background:rgba(255,122,0,.12);color:var(--org)}
.m-ico svg{width:30px;height:30px}
.m-card h3{font-size:23px;font-weight:900}
.m-card p{color:var(--mut);font-size:16px;margin-top:6px}
.m-card .go{margin-left:auto;color:var(--org);font-size:26px;flex:none}
/* ---------- 支持区 ---------- */
.sup{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:8px}
.sup a{display:flex;flex-direction:column;gap:8px;background:var(--panel);border:1px solid var(--line);border-radius:var(--rad);padding:28px;transition:.25s}
.sup a:hover{border-color:var(--olv2);transform:translateY(-4px)}
.sup h3{font-size:20px;font-weight:800}
.sup p{color:var(--mut);font-size:15px}
.sup .go{color:var(--org);font-size:15px;font-weight:800;letter-spacing:.1em;text-transform:uppercase;margin-top:6px}
.sup-info{display:flex;gap:26px;flex-wrap:wrap;margin-top:26px;color:var(--mut);font-size:16px}
.sup-info a{color:var(--txt);border-bottom:1px dashed var(--line2)}
/* ---------- 页脚 ---------- */
.ft{background:#0e1b2e;border-top:1px solid var(--line);padding:64px 0 0}
.ft-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:40px}
.ft h4{font-size:12px;font-weight:700;letter-spacing:.2em;text-transform:uppercase;color:#8fa0b5;margin-bottom:16px}
.ft-links{display:grid;gap:10px}
.ft-links a{color:#d6deea;font-size:14px;transition:.2s}
.ft-links a:hover{color:#ffb35c}
.ft-blurb{color:#8fa0b5;font-size:14px;max-width:340px;margin-top:12px}
.ft-contact{display:grid;gap:10px;color:#d6deea;font-size:14px}
.ft-contact a{border-bottom:1px dashed rgba(255,255,255,.25)}
.ft-bot{border-top:1px solid rgba(255,255,255,.14);margin-top:56px;padding:22px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:#8fa0b5;font-size:13px}
/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .p-grid{grid-template-columns:repeat(3,1fr)}
  .series,.feats{grid-template-columns:repeat(2,1fr)}
  .ft-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .nav,.hd-lang{display:none}
  .burger{display:flex}
  .drawer{display:block;position:fixed;inset:0;z-index:99;background:#ffffff;padding:110px 30px 40px;transform:translateX(100%);visibility:hidden;transition:transform .3s,visibility .3s;overflow-y:auto}
  .drawer.open{transform:none;visibility:visible}
  .drawer a{display:block;font-size:20px;font-weight:700;padding:14px 0;border-bottom:1px solid var(--line);color:var(--txt)}
  .drawer select{margin-top:22px}
  .slide{background-position:52% center}
          .slide::after{background:linear-gradient(180deg,rgba(10,12,13,.5) 0%,rgba(10,12,13,.28) 40%,rgba(10,12,13,.88) 100%)}
  .hero-txt{padding:110px 0 90px;text-align:left}
  .arr{display:none}
  .p-grid,.series,.feats,.sup,.m-cards{grid-template-columns:1fr}
  .btn{padding:16px 24px;letter-spacing:.06em}
  .ft-grid{grid-template-columns:1fr}
  .story{background-attachment:scroll}
  .sec{padding:64px 0}
}