/* 叶掌柜官网 v2（2026-11-03 重写：参数化 / 对比 / 两套方案 / 小米式表达） */
:root{
  --ink:#0f1210; --ink2:#3c4642; --ink3:#7c8a84;
  --line:#e8ecea; --line2:#f2f5f3;
  --green:#1f7a52; --green-d:#0e4630; --green-l:#eef7f2; --green-mid:#c9e8d8;
  --orange:#ff6900; --orange-d:#e85d00;
  --bg:#fff; --bg2:#f7f9f8;
  --r:16px; --r-lg:22px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.72 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img,svg{max-width:100%;display:block}
.wrap{max-width:1160px;margin:0 auto;padding:0 22px}
section{padding:82px 0}
.sec-head{text-align:center;margin-bottom:44px}
.eyebrow{font-size:12px;letter-spacing:3.2px;color:var(--green);font-weight:800;text-transform:uppercase}
.sec-head h2{font-size:clamp(26px,3.2vw,40px);line-height:1.24;margin:12px 0 12px;letter-spacing:-.6px}
.sec-head p{color:var(--ink3);margin:0 auto;font-size:15.5px;max-width:640px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 26px;border-radius:999px;font-weight:700;font-size:15px;border:1px solid transparent;transition:.18s;cursor:pointer}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-d);transform:translateY(-1px)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{transform:translateY(-1px)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--ink3)}

/* 导航 */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;gap:26px;height:64px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:17px;letter-spacing:-.2px}
.brand img{width:30px;height:30px;border-radius:8px}
.nav-links{display:flex;gap:22px;margin-left:auto;font-size:14.5px;color:var(--ink2)}
.nav-links a:hover{color:var(--green)}
.nav-tel{font-size:14.5px;color:var(--ink2);font-variant-numeric:tabular-nums}
.nav .btn{padding:10px 18px;font-size:14px}

/* Hero */
.hero{background:linear-gradient(180deg,#fbfdfc,#fff);border-bottom:1px solid var(--line);padding:64px 0 56px}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:48px;align-items:center}
.tagline{display:inline-flex;align-items:center;gap:8px;background:var(--green-l);color:var(--green);font-size:13px;font-weight:700;padding:7px 13px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:clamp(30px,4.1vw,52px);line-height:1.14;letter-spacing:-1.6px;margin:0 0 16px}
.hero h1 em{font-style:normal;color:var(--green)}
.hero .lead{font-size:17px;color:var(--ink2);margin:0 0 24px;max-width:560px}
.price-row{display:flex;align-items:flex-end;gap:22px;flex-wrap:wrap;margin-bottom:24px}
.price{display:flex;align-items:baseline;gap:6px}
.price b{font-size:clamp(32px,4.4vw,46px);letter-spacing:-2px;font-variant-numeric:tabular-nums}
.price span{font-size:14px;color:var(--ink3)}
.price-note{font-size:13px;color:var(--ink3);padding-bottom:8px;border-left:1px solid var(--line);padding-left:18px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:28px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding-top:20px;border-top:1px solid var(--line)}
.hero-stats b{display:block;font-size:22px;letter-spacing:-.6px;font-variant-numeric:tabular-nums}
.hero-stats span{font-size:12.5px;color:var(--ink3)}
.hero-stats small{font-size:12px;font-weight:600;color:var(--ink3);margin-left:2px}

/* 设备示意图（纯 CSS/SVG，无照片） */
.device{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:16px;box-shadow:0 24px 60px rgba(15,70,48,.10)}
.device-bar{display:flex;gap:6px;margin-bottom:10px}
.device-bar i{width:8px;height:8px;border-radius:50%;background:#e6e9e8}
.device-screen{background:#0f4732;border-radius:14px;padding:18px;color:#fff}
.ds-top{display:flex;justify-content:space-between;align-items:center;font-size:12px;opacity:.8;margin-bottom:14px}
.ds-big{font-size:34px;font-weight:800;letter-spacing:-1.4px;font-variant-numeric:tabular-nums}
.ds-label{font-size:12px;opacity:.7;margin-bottom:10px}
.ds-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.ds-cell{background:rgba(255,255,255,.09);border-radius:10px;padding:10px 12px}
.ds-cell b{display:block;font-size:17px;font-variant-numeric:tabular-nums}
.ds-cell span{font-size:11.5px;opacity:.72}
.ds-bars{display:flex;align-items:flex-end;gap:7px;height:52px;margin-top:16px}
.ds-bars i{flex:1;background:rgba(255,255,255,.26);border-radius:4px 4px 0 0}

/* 痛点 */
.pain{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.pain-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px 22px 20px}
.pain-card .q{font-size:15px;font-weight:700;margin:0 0 8px;letter-spacing:-.2px}
.pain-card .a{font-size:13.5px;color:var(--ink2);margin:0}
.pain-card .n{font-size:11.5px;font-weight:800;color:var(--orange);letter-spacing:1.6px;text-transform:uppercase;margin-bottom:10px}

/* 模块矩阵 */
.mods{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.mod{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px 24px;transition:.2s}
.mod:hover{border-color:var(--green-mid);box-shadow:0 14px 34px rgba(15,70,48,.07)}
.mod-h{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.mod-code{display:inline-flex;align-items:center;justify-content:center;min-width:42px;height:24px;padding:0 9px;border-radius:7px;background:rgba(31,122,82,.09);color:var(--green);font-size:12px;font-weight:800;letter-spacing:.4px}
.mod h3{font-size:16.5px;margin:0;letter-spacing:-.2px}
.mod p{margin:0 0 12px;font-size:13.8px;color:var(--ink2)}
.mod dl{display:grid;grid-template-columns:auto 1fr;gap:6px 12px;margin:0;font-size:12.8px}
.mod dt{color:var(--ink3)}
.mod dd{margin:0;color:var(--ink);font-variant-numeric:tabular-nums}

/* 参数表 */
.spec{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.spec-table{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.spec-row{display:grid;grid-template-columns:220px 1fr;gap:0;border-bottom:1px solid var(--line)}
.spec-row:last-child{border-bottom:0}
.spec-row dt{padding:15px 22px;background:var(--line2);color:var(--ink3);font-size:13.5px;margin:0}
.spec-row dd{padding:15px 22px;margin:0;font-size:14px;color:var(--ink)}
.spec-row dd b{font-variant-numeric:tabular-nums}

/* 安全 */
.sec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.sec-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px}
.sec-item b{display:block;font-size:14.5px;margin-bottom:6px}
.sec-item span{font-size:12.8px;color:var(--ink3);line-height:1.55;display:block}
.sec-item i{display:inline-flex;width:30px;height:30px;border-radius:9px;background:var(--green-l);color:var(--green);align-items:center;justify-content:center;font-size:15px;font-style:normal;margin-bottom:10px}

/* 对比表 */
.cmp{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:#fff}
.cmp table{border-collapse:collapse;width:100%;min-width:760px;font-size:14px}
.cmp th,.cmp td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.cmp thead th{background:var(--line2);font-size:13px;color:var(--ink3);font-weight:700}
.cmp thead th.us{background:var(--green-l);color:var(--green)}
.cmp td.us{background:#f8fcfa;font-weight:600}
.cmp tr:last-child td{border-bottom:0}
.cmp .bad{color:#b0433b}
.cmp .good{color:var(--green);font-weight:700}

/* 方案 */
.plans{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:start}
.plan{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:28px 28px 26px;position:relative}
.plan.rec{border-color:var(--green);box-shadow:0 18px 44px rgba(15,70,48,.10)}
.plan .badge{position:absolute;top:-12px;left:26px;background:var(--green);color:#fff;font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px}
.plan h3{font-size:20px;margin:6px 0 4px;letter-spacing:-.3px}
.plan .sub{font-size:13px;color:var(--ink3);margin:0 0 18px}
.plan .p{display:flex;align-items:baseline;gap:6px;margin-bottom:4px}
.plan .p b{font-size:38px;letter-spacing:-1.8px;font-variant-numeric:tabular-nums}
.plan .p span{font-size:13.5px;color:var(--ink3)}
.plan .p-note{font-size:12.5px;color:var(--ink3);margin:0 0 20px}
.plan ul{list-style:none;margin:0 0 22px;padding:0;display:grid;gap:9px}
.plan li{font-size:13.8px;color:var(--ink2);display:flex;gap:9px;align-items:flex-start}
.plan li::before{content:"✓";color:var(--green);font-weight:800;flex:none}
.plan li.no{color:var(--ink3)}
.plan li.no::before{content:"—";color:var(--ink3)}
.plan .btn{width:100%}

/* 硬件 */
.hw{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.hw-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.hw-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:24px;display:grid;grid-template-columns:200px 1fr;gap:24px;align-items:center}
.hw-art{background:var(--line2);border-radius:14px;height:190px;display:flex;align-items:center;justify-content:center;padding:16px}
.hw-art svg{width:100%;height:auto}
.hw-art img{width:100%;height:100%;object-fit:contain;border-radius:10px;mix-blend-mode:multiply}
.hw-card h3{font-size:17px;margin:0 0 4px}
.hw-card .price-tag{font-size:26px;font-weight:800;letter-spacing:-1px;margin:2px 0 8px;font-variant-numeric:tabular-nums}
.hw-card .price-tag small{font-size:13px;font-weight:600;color:var(--ink3);margin-left:4px}
.hw-card dl{display:grid;grid-template-columns:auto 1fr;gap:5px 12px;margin:0;font-size:12.8px}
.hw-card dt{color:var(--ink3)}
.hw-card dd{margin:0}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:s}
.step{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 18px;position:relative}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-13px;left:18px;width:28px;height:28px;border-radius:50%;background:var(--green);color:#fff;font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center}
.step b{display:block;font-size:14.5px;margin:8px 0 6px}
.step span{font-size:12.6px;color:var(--ink3);line-height:1.55;display:block}

/* 数据 */
.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.data-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px}
.data-card b{display:block;font-size:30px;letter-spacing:-1.2px;font-variant-numeric:tabular-nums}
.data-card span{font-size:12.8px;color:var(--ink3)}
.data-src{font-size:12px;color:var(--ink3);text-align:center;margin-top:16px}

/* FAQ */
.faq{max-width:860px;margin:0 auto}
.faq details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px 22px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:700;font-size:15px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--ink3);font-weight:400}
.faq details[open] summary::after{content:"–"}
.faq p{margin:12px 0 0;font-size:13.8px;color:var(--ink2)}

/* CTA */
.cta{background:var(--green-d);color:#fff;border-radius:var(--r-lg);padding:44px 40px;display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center}
.cta h2{font-size:clamp(22px,2.6vw,32px);margin:0 0 10px;letter-spacing:-.6px}
.cta p{margin:0;color:rgba(255,255,255,.82);font-size:14.5px;max-width:620px}
.cta .btn-primary{background:#fff;color:var(--green-d)}
.cta .btn-primary:hover{background:#eaf6f0}

/* 页脚 */
.foot{border-top:1px solid var(--line);padding:40px 0 46px;font-size:13px;color:var(--ink3)}
.foot-in{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.foot a:hover{color:var(--green)}
.foot .legal{line-height:1.9;max-width:640px}

/* 响应式 */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .mods,.plans,.hw-grid,.pain-grid{grid-template-columns:1fr}
  .sec-grid,.data-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .spec-row{grid-template-columns:1fr}
  .spec-row dt{padding:12px 20px 6px}
  .cta{grid-template-columns:1fr;padding:34px 26px}
  .nav-links{display:none}
}
@media(max-width:560px){
  .wrap{padding:0 16px}
  section{padding:56px 0}
  .hero{padding:44px 0 40px}
  .hero-stats{grid-template-columns:1fr 1fr;gap:14px}
  .sec-grid,.data-grid{grid-template-columns:1fr}
  .hw-card{grid-template-columns:1fr}
  .hw-art{height:140px}
  .plan{padding:24px 20px}
}