/* =========================================================================
 *  北京中律信合法律咨询有限公司  ——  品牌设计系统
 *  主色：克莱因蓝 #002FA7（与个人站 rehimjan.com 同体系，强化联动）
 *  点缀：金棕 #B8860B ｜ 暖米底 #FBF7F0
 * ========================================================================= */

:root{
  --klein:#002FA7;
  --klein-deep:#001B66;
  --navy:#061A3A;
  --chelsea:#034694;
  --sky:#2E6BE6;
  --ice:#EAF1FF;
  --mist:#F5F8FF;
  --cream:#FBF7F0;
  --gold:#B8860B;
  --ink:#0B1437;
  --muted:#5B6B8C;
  --line:#DCE6F7;
  --white:#fff;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 10px 30px rgba(10,30,90,.10);
  --shadow-lg:0 24px 60px rgba(10,30,90,.18);
  --maxw:1140px;
  --nav-h:66px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  --serif:"Songti SC","STSong","SimSun",Georgia,"Times New Roman",serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--mist);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.serif{font-family:var(--serif)}

/* ---------- 双语切换 ---------- */
html.lang-zh .en{display:none}
html.lang-en .zh{display:none}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:50;height:var(--nav-h);display:flex;align-items:center;
  background:rgba(255,255,255,.86);backdrop-filter:saturate(160%) blur(14px);
  border-bottom:1px solid var(--line);transition:box-shadow .25s}
.nav.scrolled{box-shadow:0 10px 30px rgba(10,30,90,.10)}
.nav .container{display:flex;align-items:center;justify-content:space-between;width:100%}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:.3px}
.brand .mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--klein),var(--chelsea));
  color:#fff;display:grid;place-items:center;font-weight:900;font-size:16px;box-shadow:0 4px 12px rgba(0,47,167,.35)}
.brand b{color:var(--klein);font-size:16px;line-height:1.15}
.brand small{display:block;font-size:11px;color:var(--muted);font-weight:600;letter-spacing:.5px}
.nav-links{display:flex;gap:4px;align-items:center}
.nav-links a{padding:8px 14px;border-radius:999px;font-size:14.5px;font-weight:600;color:var(--muted);transition:.2s}
.nav-links a:hover{color:var(--klein);background:var(--ice)}
.nav-links a.active{color:#fff;background:linear-gradient(135deg,var(--klein),var(--chelsea))}
.nav-right{display:flex;align-items:center;gap:10px}
.lang-btn{border:1.5px solid var(--line);background:#fff;color:var(--klein);font-weight:700;font-size:13px;
  padding:7px 13px;border-radius:999px;cursor:pointer;transition:.2s;font-family:var(--font)}
.lang-btn:hover{border-color:var(--klein);background:var(--ice)}
.nav-cta{margin-left:4px;padding:9px 18px;border-radius:999px;font-weight:700;font-size:14px;color:#fff;
  background:linear-gradient(135deg,var(--klein),var(--chelsea));box-shadow:0 6px 16px rgba(0,47,167,.35)}
.nav-toggle{display:none;background:none;border:0;font-size:26px;color:var(--klein);cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;cursor:pointer;border:0;
  padding:13px 28px;border-radius:999px;font-size:15.5px;font-weight:700;font-family:var(--font);transition:.2s}
.btn-primary{background:linear-gradient(135deg,var(--klein),var(--chelsea));color:#fff;box-shadow:0 10px 26px rgba(0,47,167,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(0,47,167,.45)}
.btn-ghost{background:rgba(255,255,255,.16);color:#fff;border:1.5px solid rgba(255,255,255,.5)}
.btn-ghost:hover{background:rgba(255,255,255,.28)}
.btn-outline{background:#fff;color:var(--klein);border:1.5px solid var(--line)}
.btn-outline:hover{border-color:var(--klein);background:var(--ice)}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(1200px 520px at 82% -12%,rgba(46,107,230,.55),transparent 60%),
    radial-gradient(900px 500px at 2% 112%,rgba(3,70,148,.6),transparent 55%),
    linear-gradient(135deg,var(--klein-deep),var(--klein) 55%,var(--chelsea))}
.hero::after{content:"";position:absolute;inset:0;background-image:
  radial-gradient(rgba(255,255,255,.06) 1px,transparent 1px);background-size:26px 26px;opacity:.5;pointer-events:none}
.hero .container{position:relative;z-index:1;padding:96px 22px 104px}
.hero-eyebrow{display:inline-block;font-size:13.5px;font-weight:700;letter-spacing:1.5px;text-transform:uppercase;
  color:#cfe0ff;background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.22);padding:7px 16px;border-radius:999px;margin-bottom:22px}
.hero h1{font-family:var(--serif);font-size:clamp(30px,5vw,52px);line-height:1.2;font-weight:800;letter-spacing:.5px;max-width:18em}
.hero p.lead{margin:22px 0 34px;font-size:clamp(15px,2vw,19px);color:#e6eeff;max-width:40em;line-height:1.8}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:62px;
  border-top:1px solid rgba(255,255,255,.18);padding-top:30px}
.hero-stat .n{font-family:var(--serif);font-size:clamp(22px,3vw,34px);font-weight:800;color:#fff}
.hero-stat .l{font-size:13px;color:#cfe0ff;margin-top:4px}

/* ---------- 通用 section ---------- */
section.block{padding:84px 0}
.section-head{text-align:center;max-width:42em;margin:0 auto 50px}
.section-head .eyebrow{font-size:13px;font-weight:700;letter-spacing:1.5px;color:var(--klein);text-transform:uppercase}
.section-head h2{font-family:var(--serif);font-size:clamp(26px,3.6vw,38px);font-weight:800;margin:12px 0 12px;letter-spacing:.5px}
.section-head p{color:var(--muted);font-size:16px}
.bg-cream{background:var(--cream)}
.bg-ice{background:linear-gradient(180deg,#fff,var(--mist))}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:22px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;
  box-shadow:var(--shadow);transition:.25s;height:100%}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#c5d6f5}
.card .ic{width:48px;height:48px;border-radius:13px;display:grid;place-items:center;font-size:24px;
  background:var(--ice);color:var(--klein);margin-bottom:16px}
.card h3{font-size:18.5px;font-weight:800;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px;line-height:1.75}
.card .more{display:inline-block;margin-top:14px;color:var(--klein);font-weight:700;font-size:14px}

/* ---------- 信任条 ---------- */
.trust{border-left:4px solid var(--gold);background:#fff;border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:20px 22px;box-shadow:var(--shadow)}
.trust h4{font-size:16.5px;font-weight:800;margin-bottom:6px;color:var(--ink)}
.trust p{color:var(--muted);font-size:14px}

/* ---------- 流程 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow)}
.step .num{font-family:var(--serif);font-size:30px;font-weight:800;color:var(--klein);opacity:.18}
.step h4{font-size:17px;font-weight:800;margin:6px 0 8px}
.step p{color:var(--muted);font-size:14px}

/* ---------- CTA band ---------- */
.cta-band{background:linear-gradient(135deg,var(--klein-deep),var(--klein) 60%,var(--chelsea));color:#fff;border-radius:24px;
  padding:52px 40px;text-align:center;box-shadow:var(--shadow-lg);position:relative;overflow:hidden}
.cta-band h2{font-family:var(--serif);font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:12px}
.cta-band p{color:#dbe6ff;font-size:16px;margin-bottom:26px}

/* ---------- 服务页详情 ---------- */
.svc{display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center;padding:46px 0;border-bottom:1px solid var(--line)}
.svc:last-child{border-bottom:0}
.svc .svc-art{height:220px;border-radius:var(--radius);background:linear-gradient(135deg,var(--ice),#fff);
  display:grid;place-items:center;font-size:64px;color:var(--klein);box-shadow:inset 0 0 0 1px var(--line)}
.svc h3{font-family:var(--serif);font-size:26px;font-weight:800;margin-bottom:6px}
.svc .tag{display:inline-block;font-size:12.5px;font-weight:700;color:var(--klein);background:var(--ice);
  padding:5px 12px;border-radius:999px;margin-bottom:14px}
.svc p{color:var(--muted);font-size:15px;line-height:1.8;margin-bottom:14px}
.svc ul{margin:0 0 18px;padding:0}
.svc ul li{position:relative;padding-left:22px;margin-bottom:8px;color:var(--ink);font-size:14.5px}
.svc ul li::before{content:"✓";position:absolute;left:0;color:var(--klein);font-weight:800}
.svc .price{font-weight:800;color:var(--klein);font-size:15px;margin-bottom:16px}
.note{background:var(--cream);border:1px dashed var(--gold);border-radius:var(--radius-sm);padding:18px 20px;
  color:#6b5a1e;font-size:14px;margin-top:30px}

/* ---------- 关于页 ---------- */
.about-hero{padding:70px 0 30px}
.about-hero h1{font-family:var(--serif);font-size:clamp(28px,4vw,44px);font-weight:800;margin-bottom:14px}
.about-hero p{color:var(--muted);font-size:17px;max-width:46em;line-height:1.85}
.split{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:start}
.founder{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.founder .av{width:62px;height:62px;border-radius:50%;background:linear-gradient(135deg,var(--klein),var(--chelsea));
  color:#fff;display:grid;place-items:center;font-weight:800;font-size:24px;margin-bottom:14px}
.founder h3{font-size:20px;font-weight:800}
.founder .role{color:var(--klein);font-weight:700;font-size:13.5px;margin-bottom:12px}
.founder p{color:var(--muted);font-size:14.5px;line-height:1.8;margin-bottom:14px}
.founder .plink{display:inline-flex;align-items:center;gap:6px;color:var(--klein);font-weight:700;font-size:14px}
.compliance{background:var(--cream);border-radius:var(--radius);padding:30px;border:1px solid #efe2c6}
.compliance h3{font-size:19px;font-weight:800;margin-bottom:12px;color:#7a5d12}
.compliance p{color:#6b5a1e;font-size:14.5px;line-height:1.85}
.values{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:10px}
.value{background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);padding:22px;box-shadow:var(--shadow)}
.value h4{font-size:16px;font-weight:800;margin-bottom:6px}
.value p{color:var(--muted);font-size:13.5px}

/* ---------- 联系页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:36px;align-items:start}
.contact-info .item{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--line)}
.contact-info .item .ic{width:42px;height:42px;border-radius:11px;background:var(--ice);color:var(--klein);
  display:grid;place-items:center;font-size:20px;flex-shrink:0}
.contact-info .item h4{font-size:14px;color:var(--muted);font-weight:700;margin-bottom:3px}
.contact-info .item p{font-size:15.5px;font-weight:600}
.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.form label{display:block;font-size:13.5px;font-weight:700;color:var(--ink);margin:0 0 7px}
.form input,.form textarea{width:100%;padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  font-family:var(--font);font-size:15px;color:var(--ink);background:#fbfdff;transition:.2s;margin-bottom:18px}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--klein);background:#fff}
.form textarea{resize:vertical;min-height:120px}
.form .hint{font-size:12.5px;color:var(--muted);margin-top:6px}

/* ---------- 页脚 ---------- */
footer{background:var(--navy);color:#cdd8ee;padding:56px 0 26px;margin-top:30px}
footer .top{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:30px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.10)}
footer .f-brand .mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--sky),var(--chelsea));
  color:#fff;display:grid;place-items:center;font-weight:900;font-size:17px;margin-bottom:14px}
footer .f-brand b{color:#fff;font-size:16px;display:block}
footer .f-brand p{font-size:13.5px;color:#9fb0d0;margin-top:10px;line-height:1.7;max-width:24em}
footer h5{color:#fff;font-size:14px;font-weight:800;margin-bottom:14px;letter-spacing:.5px}
footer ul li{margin-bottom:9px}
footer ul li a{font-size:13.5px;color:#9fb0d0;transition:.2s}
footer ul li a:hover{color:#fff}
footer .f-personal a{color:var(--sky);font-weight:700}
footer .f-personal a:hover{color:#fff}
footer .bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;padding-top:20px;font-size:12.5px;color:#8194b8}
footer .bottom .disc{color:#7e90b4;max-width:60em;line-height:1.6}

/* ---------- 响应式 ---------- */
@media (max-width:920px){
  .grid-4,.steps{grid-template-columns:repeat(2,1fr)}
  .grid-3,.grid-2,.svc,.split,.contact-grid{grid-template-columns:1fr}
  .values{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:24px}
  footer .top{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  .nav-links{position:fixed;top:var(--nav-h);left:0;right:0;background:#fff;flex-direction:column;
    padding:14px 22px;gap:6px;box-shadow:var(--shadow-lg);border-bottom:1px solid var(--line);
    transform:translateY(-130%);transition:.28s;z-index:40}
  .nav-links.open{transform:translateY(0)}
  .nav-links a{width:100%}
  .nav-toggle{display:block}
  .nav-cta{display:none}
  .grid-4,.steps,.grid-3{grid-template-columns:1fr}
  footer .top{grid-template-columns:1fr}
  .hero .container{padding:70px 22px 80px}
  .cta-band{padding:40px 22px}
}