:root{
    --teal:#00D1B2; --teal-dark:#00A68C; --teal-deep:#0B7A70; --teal-light:#E6FAF7;
    --ink:#1d2440; --muted:#5d6679; --bg:#F9FAFB; --line:#e4e7f4;
}
*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);line-height:1.7;background:#fff;}

/* 抵消 Bootstrap 3 默认排版间距，保持页内原有布局 */
.hero h1,.hero h2,.hero h3,.hero h4,.hero p,.hero ul,
.section h1,.section h2,.section h3,.section h4,.section p,.section ul{margin:0;}

.wrap{max-width:1280px;margin:0 auto;padding:0 24px;}
.section{padding:76px 0;}
#seg{max-width:1920px;margin:0 auto;}
.kicker{font-size:12px;letter-spacing:4px;color:var(--teal-dark);font-weight:700;margin-bottom:12px;}
.section .hy-h2{font-size:30px;font-weight:800;margin-bottom:12px;letter-spacing:.5px;}
.sub{font-size:15px;color:var(--muted);max-width:680px;}

/* ===== Hero ===== */
.hero{background:
    radial-gradient(900px 400px at 85% 0%, rgba(255,255,255,.14), transparent 55%),
    linear-gradient(150deg,#0B7A70 0%,#00A68C 55%,#00D1B2 100%);
    color:#fff;padding:76px 0 0;max-width:1920px;margin:0 auto;}
.hero-grid{max-width:1280px;margin:0 auto;padding:0 24px;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;}
.crumb{font-size:13px;color:rgba(255,255,255,.65);margin-bottom:20px;}
.crumb b{color:#B2F5EA;}
.hero h1{font-size:42px;font-weight:800;line-height:1.35;letter-spacing:1px;}
.hero h1 em{font-style:normal;color:#B2F5EA;}
.hero .lead{font-size:16px;font-weight:400;color:rgba(255,255,255,.82);margin:20px 0 32px;max-width:560px;}
.hy-btn{display:inline-block;padding:13px 38px;border-radius:30px;font-size:15px;font-weight:600;text-decoration:none;transition:.25s;cursor:pointer;}
.hy-btn-warm{background:#fff;color:var(--teal-deep);box-shadow:0 6px 18px rgba(0,0,0,.18);}
.hy-btn-warm:hover{transform:translateY(-2px);}
.hy-btn-line{border:1px solid rgba(255,255,255,.45);color:#fff;}
.hy-btn-line:hover{border-color:#fff;}
/* 学段速览卡 */
.seg-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);border-radius:16px;padding:14px;backdrop-filter:blur(4px);}
.seg-item{display:flex;gap:16px;align-items:center;padding:16px 18px;border-radius:10px;transition:.25s;cursor:pointer;}
.seg-item:hover,.seg-item.on{background:rgba(255,255,255,.14);}
.seg-item .no{font-size:22px;font-weight:800;color:#B2F5EA;font-family:Georgia,serif;width:40px;}
.seg-item .t{font-size:16px;font-weight:700;}
.seg-item .d{font-size:12px;color:rgba(255,255,255,.68);}
.hero-note{font-size:11px;color:rgba(255,255,255,.4);padding:18px 24px 28px;max-width:1280px;margin:0 auto;}

/* ===== Tabs ===== */
.tabs{display:flex;gap:10px;justify-content:center;margin:44px 0 36px;flex-wrap:wrap;}
.tab{padding:12px 34px;border-radius:30px;font-size:15px;font-weight:700;cursor:pointer;border:1px solid var(--line);background:#fff;color:var(--muted);transition:.25s;user-select:none;}
.tab:hover{border-color:var(--teal);color:var(--teal-dark);}
.tab.on{background:linear-gradient(90deg,var(--teal),#2fd4c0);color:#fff;border-color:transparent;box-shadow:0 6px 16px rgba(0,209,178,.3);}
.hy-panel{display:none;animation:fade .35s ease;}
.hy-panel.show{display:block;}
@keyframes fade{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:none;}}

.panel-head{display:flex;align-items:center;gap:16px;margin-bottom:28px;}
.panel-head .badge{font-size:13px;font-weight:800;color:#fff;background:linear-gradient(90deg,var(--teal),var(--teal-deep));padding:5px 18px;border-radius:20px;}
.panel-head h3{font-size:24px;font-weight:800;}
.panel-head .pos{font-size:12px;color:#98a0b6;letter-spacing:2px;margin-left:auto;text-transform:uppercase;}

.compare{display:grid;grid-template-columns:1fr 1.35fr;background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 6px 26px rgba(29,36,64,.07);}
.cp{padding:32px 34px;}
.cp-pain{background:#fdf8f6;border-right:1px dashed var(--line);}
.cp h4{font-size:13px;font-weight:800;letter-spacing:3px;margin-bottom:18px;}
.cp-pain h4{color:#c96a4a;}
.cp-sol h4{color:var(--teal-deep);}
.cp li{list-style:none;font-size:14px;padding:9px 0 9px 26px;position:relative;}
.cp-pain li{color:#6b5a52;}
.cp-pain li::before{content:"✖";position:absolute;left:0;top:11px;color:#dd9a85;font-size:12px;}
.cp-sol li{color:#3d4560;}
.cp-sol li::before{content:"✔";position:absolute;left:0;color:var(--teal);font-weight:700;}
.cp-sol li b{color:#1d2440;}

/* ===== 平台能力 ===== */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:48px;}
.cap{background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px 26px;transition:.25s;}
.cap:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(29,36,64,.1);border-color:#9fe8dd;}
.cap .ic{width:46px;height:46px;border-radius:12px;background:var(--teal-light);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:14px;}
.cap h3{font-size:16px;font-weight:700;margin-bottom:8px;}
.cap p{font-size:13px;color:var(--muted);}

/* ===== CTA ===== */
.cta{background:linear-gradient(120deg,#0B7A70,#00A68C 60%,#00D1B2);border-radius:18px;padding:56px 48px;color:#fff;display:flex;justify-content:space-between;align-items:center;gap:32px;}
.cta h2{font-size:26px;font-weight:800;}
.cta p{opacity:.85;font-size:14px;margin-top:8px;}
.cta .hy-btn{background:#fff;color:var(--teal-deep);border-radius:30px;}

@media(max-width:900px){
    .hero-grid,.compare,.cta{grid-template-columns:1fr;}
    .cp-pain{border-right:none;border-bottom:1px dashed var(--line);}
    .cap-grid{grid-template-columns:1fr;}
    .panel-head .pos{display:none;}
    .cta{flex-direction:column;align-items:flex-start;}
    .hero h1{font-size:30px;}
}