/* ===== 星智荐 网站样式 ===== */
:root{
  --brand:#2049c9;
  --brand-dark:#15327f;
  --brand-light:#eaf0ff;
  --accent:#ff7a3d;
  --accent-dark:#e85f1f;
  --ink:#16203a;
  --muted:#5b6478;
  --bg:#f5f8fd;
  --card:#ffffff;
  --line:#e5ebf4;
  --good:#1f9d6b;
  --warn:#c98a00;
  --shadow:0 10px 30px rgba(21,50,127,.08);
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:1140px;margin:0 auto;padding:0 22px}

/* ===== 导航 ===== */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{max-width:1140px;margin:0 auto;padding:13px 22px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;letter-spacing:.5px}
.logo .mark{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,var(--brand),#5b7cff);
  display:grid;place-items:center;color:#fff;font-size:15px;font-weight:900}
.logo small{display:block;font-size:11px;font-weight:500;color:var(--muted);letter-spacing:1px;margin-top:-2px}
.logo-img{height:40px;width:auto;display:block}
.footer .logo-img{height:52px;background:#fff;border-radius:12px;padding:6px 10px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{font-size:15px;color:var(--muted);font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--brand)}
.nav-links a.active{color:var(--brand)}
.nav-cta{padding:9px 18px;border-radius:999px;background:var(--accent);color:#fff;font-weight:700;font-size:14px}
.nav-cta:hover{background:var(--accent-dark);color:#fff}
.nav-toggle{display:none}

/* ===== 按钮 ===== */
.btn{display:inline-block;padding:13px 28px;border-radius:999px;font-weight:700;font-size:15px;
  transition:transform .15s,box-shadow .2s;cursor:pointer;border:none}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(32,73,201,.3)}
.btn-primary:hover{background:var(--brand-dark);transform:translateY(-2px)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);transform:translateY(-2px)}
.btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.btn-ghost:hover{background:var(--brand-light)}

/* ===== 英雄区 ===== */
.hero{position:relative;overflow:hidden;background:
  radial-gradient(1100px 500px at 80% -10%,#dbe6ff 0,transparent 60%),
  radial-gradient(900px 500px at 0% 10%,#ffeede 0,transparent 55%),
  linear-gradient(180deg,#f7fbff,#f5f8fd);
  padding:84px 0 76px}
.hero-inner{max-width:1140px;margin:0 auto;padding:0 22px;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero h1{font-size:50px;line-height:1.12;font-weight:900;letter-spacing:-.5px}
.hero h1 .hl{background:linear-gradient(120deg,var(--brand),#6f8bff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{margin-top:20px;font-size:18px;color:var(--muted);max-width:520px}
.hero .actions{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.hero .badge{display:inline-block;background:#fff;border:1px solid var(--line);color:var(--brand);
  font-size:13px;font-weight:700;padding:6px 14px;border-radius:999px;margin-bottom:18px;box-shadow:var(--shadow)}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:var(--shadow)}
.hero-card h4{font-size:14px;color:var(--muted);font-weight:600;margin-bottom:14px;letter-spacing:.5px}
.hero-card .row{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.hero-card .row:last-child{border-bottom:none}
.hero-card .row b{color:var(--brand)}
.hero-card .pos{color:var(--good);font-weight:700}
.hero-card .neg{color:#e0392b;font-weight:700}

/* ===== 通用区块 ===== */
.section{padding:72px 0}
.section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section h2{font-size:34px;font-weight:900;letter-spacing:-.3px;text-align:center}
.section h2 .em{color:var(--brand)}
.lead{text-align:center;color:var(--muted);font-size:17px;max-width:720px;margin:14px auto 0}
.tag{display:inline-block;background:var(--brand-light);color:var(--brand);font-size:13px;font-weight:700;
  padding:5px 14px;border-radius:999px;margin-bottom:14px}
.center{text-align:center}

/* ===== 痛点/特性网格 ===== */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:42px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:42px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(21,50,127,.12)}
.card .ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;font-size:22px;
  background:var(--brand-light);margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
.card .no{font-size:13px;font-weight:800;color:var(--accent);letter-spacing:1px}

/* ===== 四层交付底座 ===== */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px 20px;position:relative;box-shadow:var(--shadow)}
.step .num{width:38px;height:38px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:900;margin-bottom:14px}
.step h3{font-size:18px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14px}
.step .arrow{position:absolute;right:-12px;top:50%;transform:translateY(-50%);color:var(--brand);font-size:20px;z-index:2}

/* ===== 产品矩阵 ===== */
.pcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.pcard:hover{transform:translateY(-5px);box-shadow:0 18px 44px rgba(21,50,127,.14)}
.pcard .tier{padding:13px 20px;font-size:12px;font-weight:800;letter-spacing:1px;color:#fff}
.tier.free{background:linear-gradient(90deg,#3aa76d,#1f9d6b)}
.tier.std{background:linear-gradient(90deg,#2f6bff,#2049c9)}
.tier.oem{background:linear-gradient(90deg,#8a5bff,#5b34c9)}
.tier.str{background:linear-gradient(90deg,#ff8a3d,#e85f1f)}
.pcard .body{padding:20px;flex:1;display:flex;flex-direction:column}
.pcard h3{font-size:20px;margin-bottom:4px}
.pcard .price{color:var(--accent-dark);font-weight:800;font-size:14px;margin-bottom:14px}
.pcard ul{list-style:none;font-size:14px;color:var(--muted);flex:1}
.pcard ul li{padding:6px 0 6px 20px;position:relative}
.pcard ul li:before{content:"›";position:absolute;left:0;color:var(--brand);font-weight:900}
.pcard .who{margin-top:14px;font-size:13px;color:var(--muted);background:var(--bg);padding:8px 12px;border-radius:10px}
.pcard .more{margin-top:16px}
.pcard .more a{color:var(--brand);font-weight:700;font-size:14px}

/* ===== 对比表 ===== */
.table-scroll{overflow-x:auto;margin-top:40px;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;background:#fff;min-width:640px}
th,td{padding:15px 16px;text-align:left;font-size:14px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--brand);color:#fff;font-weight:700}
tr:last-child td{border-bottom:none}
td.us{background:#f0f7ff;font-weight:600}
td.them{background:#fff6f3}
.legend{margin-top:16px;font-size:13px;color:var(--muted)}
.legend .s{color:var(--warn);font-weight:700}
.legend .c{color:var(--brand);font-weight:700}

/* ===== 详情页 hero ===== */
.page-hero{padding:60px 0 30px;background:linear-gradient(180deg,#eef4ff,#f5f8fd)}
.page-hero h1{font-size:40px;font-weight:900;letter-spacing:-.4px}
.page-hero .sub{color:var(--muted);font-size:17px;margin-top:12px;max-width:680px}

/* ===== 方法论详情 ===== */
.layer{display:grid;grid-template-columns:.9fr 1.1fr;gap:30px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;margin-top:24px;box-shadow:var(--shadow)}
.layer:nth-child(even){background:#fbfdff}
.layer .lhead{display:flex;align-items:center;gap:16px}
.layer .lnum{width:54px;height:54px;border-radius:14px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:24px;font-weight:900;flex:none}
.layer h3{font-size:23px}
.layer .ltag{font-size:13px;color:var(--accent-dark);font-weight:700}
.layer .lbody p{color:var(--muted);margin-bottom:10px}
.layer .lbody ul{list-style:none}
.layer .lbody li{padding:5px 0 5px 22px;position:relative;color:var(--ink);font-size:15px}
.layer .lbody li:before{content:"✓";position:absolute;left:0;color:var(--good);font-weight:900}
.kv{background:var(--bg);border-radius:12px;padding:14px 16px;font-size:14px;margin-top:10px}
.kv b{color:var(--brand)}

/* ===== 表单 ===== */
.form-card{max-width:620px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:34px;box-shadow:var(--shadow)}
.form-card .field{margin-bottom:18px}
.form-card label{display:block;font-size:14px;font-weight:700;margin-bottom:7px}
.form-card input,.form-card textarea,.form-card select{width:100%;padding:12px 14px;border:1.5px solid var(--line);
  border-radius:10px;font-size:15px;font-family:inherit;background:#fbfdff;transition:border .2s}
.form-card input:focus,.form-card textarea:focus,.form-card select:focus{border-color:var(--brand);outline:none}
.form-card .hint{font-size:12px;color:var(--muted);margin-top:6px}
.note{background:var(--brand-light);border:1px solid #cdd9ff;border-radius:12px;padding:14px 16px;font-size:14px;color:var(--brand-dark);margin-bottom:22px}
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:start}

/* ===== CTA 区 ===== */
.cta{background:linear-gradient(120deg,var(--brand-dark),var(--brand));color:#fff;border-radius:24px;
  padding:54px 40px;text-align:center;margin:10px 0}
.cta h2{color:#fff;font-size:32px}
.cta p{color:#dce6ff;margin:12px 0 26px;font-size:17px}
.cta .btn-accent{box-shadow:0 10px 24px rgba(255,122,61,.4)}

/* ===== 页脚 ===== */
.footer{background:#0f1a3a;color:#aeb9d6;padding:46px 0 30px;margin-top:0}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer a{color:#aeb9d6;font-size:14px;display:block;padding:4px 0}
.footer a:hover{color:#fff}
.footer .logo{color:#fff;margin-bottom:12px}
.footer .logo small{color:#8a97c0}
.footer p.desc{font-size:14px;max-width:280px;line-height:1.7}
.footer .bottom{border-top:1px solid #20305c;margin-top:30px;padding-top:18px;font-size:13px;color:#7c89b3;display:flex;
  justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer .disc{font-size:12px;color:#6b78a3;margin-top:14px;line-height:1.6}

/* ===== 公司页 ===== */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:18px;margin-top:40px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 18px;text-align:center;box-shadow:var(--shadow)}
.stat .n{font-size:34px;font-weight:900;color:var(--brand);line-height:1.1}
.stat .l{font-size:13px;color:var(--muted);margin-top:8px}
.timeline{margin-top:42px;position:relative;padding-left:30px;max-width:820px;margin-left:auto;margin-right:auto}
.timeline:before{content:"";position:absolute;left:9px;top:8px;bottom:8px;width:2px;background:var(--line)}
.tl{position:relative;padding:0 0 28px 0}
.tl:last-child{padding-bottom:0}
.tl:before{content:"";position:absolute;left:-25px;top:4px;width:14px;height:14px;border-radius:50%;background:var(--brand);border:3px solid #fff;box-shadow:0 0 0 2px var(--brand)}
.tl .yr{font-weight:800;color:var(--brand-dark);font-size:15px;letter-spacing:.5px}
.tl h3{font-size:18px;margin:4px 0 7px}
.tl p{color:var(--muted);font-size:14px;max-width:640px}

/* ===== 品牌架构 ===== */
.arch{display:flex;align-items:stretch;justify-content:center;gap:14px;margin-top:38px;flex-wrap:wrap}
.arch-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 20px;width:258px;text-align:center;box-shadow:var(--shadow)}
.arch-item.hl2{border:2px solid var(--accent);box-shadow:0 12px 30px rgba(232,95,31,.16)}
.arch-mark{width:52px;height:52px;border-radius:14px;color:#fff;font-weight:900;font-size:22px;display:grid;place-items:center;margin:0 auto 14px}
.arch-item h3{font-size:19px;margin-bottom:6px}
.arch-item p{color:var(--ink);font-size:14px;font-weight:600;margin-bottom:6px}
.arch-item span{display:block;color:var(--muted);font-size:13px}
.arch-plus{display:grid;place-items:center;font-size:26px;font-weight:900;color:var(--brand);padding:0 4px}
.arch-note{margin-top:22px;font-size:13px;color:var(--muted);text-align:center;line-height:1.75;max-width:760px;margin-left:auto;margin-right:auto}

/* ===== 响应式 ===== */
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:38px}
  .grid3,.grid4{grid-template-columns:1fr 1fr}
  .flow{grid-template-columns:1fr 1fr}
  .step .arrow{display:none}
  .layer{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
  .nav-links{position:absolute;top:62px;left:0;right:0;background:#fff;flex-direction:column;gap:0;
    padding:8px 22px 16px;border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 0;border-bottom:1px solid var(--line);width:100%}
  .nav-toggle{display:block;background:none;border:none;font-size:24px;cursor:pointer;color:var(--ink)}
  .grid3,.grid4,.flow{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .section h2{font-size:27px}
  .cta{padding:40px 22px}
  .footer .cols{grid-template-columns:1fr}
}
@media (max-width:620px){
  .arch{flex-direction:column;align-items:center}
  .arch-item{width:100%}
  .arch-plus{display:none}
}