/* ===== 设计令牌 ===== */
:root{
  --navy:#0d2440;
  --navy-2:#143a5e;
  --blue:#1e4d7b;
  --gold:#c9a45c;
  --gold-light:#e3c987;
  --ink:#1a2330;
  --muted:#5b6b7e;
  --bg:#f5f8fc;
  --bg-soft:#eef3f9;
  --white:#ffffff;
  --line:#e2e9f1;
  --radius:16px;
  --shadow:0 18px 50px -24px rgba(13,36,64,.35);
  --shadow-sm:0 8px 24px -16px rgba(13,36,64,.4);
  --maxw:1160px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-title{font-size:34px;font-weight:800;letter-spacing:.5px;color:var(--navy);position:relative;padding-left:18px}
.section-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:3px;background:linear-gradient(var(--gold),var(--gold-light))}
.section-sub{color:var(--muted);margin-top:14px;font-size:16px;max-width:680px}

/* ===== 顶部导航 ===== */
header.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--navy);font-size:19px;letter-spacing:.5px}
.brand .logo{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--navy),var(--navy-2));color:var(--gold-light);display:grid;place-items:center;font-size:18px;font-weight:800}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{font-size:15px;color:var(--ink);font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--gold)}
.nav-cta{background:var(--navy);color:#fff;padding:10px 20px;border-radius:10px;font-size:14px;font-weight:600;transition:.2s}
.nav-cta:hover{background:var(--blue);transform:translateY(-1px)}
.menu-btn{display:none;background:none;border:none;font-size:24px;color:var(--navy);cursor:pointer}

/* ===== Hero ===== */
.hero{position:relative;background:radial-gradient(1200px 600px at 80% -10%,#1d4b78 0%,transparent 60%),linear-gradient(135deg,var(--navy) 0%,#0a1c33 100%);color:#fff;overflow:hidden;padding:110px 0 140px}
.hero::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:22px 22px;opacity:.5;pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;position:relative;z-index:2}
.hero .eyebrow{display:inline-block;color:var(--gold-light);font-size:14px;letter-spacing:3px;font-weight:600;margin-bottom:18px;border:1px solid rgba(227,201,135,.4);padding:6px 14px;border-radius:30px}
.hero h1{font-size:46px;line-height:1.25;font-weight:800;letter-spacing:1px}
.hero h1 .hl{color:var(--gold-light)}
.hero p.lead{margin-top:22px;font-size:18px;color:#cdd9e6;max-width:560px}
.hero-actions{margin-top:36px;display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:15px 30px;border-radius:12px;font-weight:700;font-size:16px;transition:.25s;cursor:pointer}
.btn-gold{background:linear-gradient(135deg,var(--gold),var(--gold-light));color:#2a1d05;box-shadow:0 12px 30px -12px rgba(201,164,92,.7)}
.btn-gold:hover{transform:translateY(-2px);box-shadow:0 18px 36px -12px rgba(201,164,92,.85)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-ghost:hover{background:rgba(255,255,255,.16)}

.hero-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:30px;backdrop-filter:blur(6px)}
.hero-card .avatar{width:84px;height:84px;border-radius:50%;background:linear-gradient(135deg,var(--gold),var(--gold-light));display:grid;place-items:center;font-size:34px;font-weight:800;color:#2a1d05;margin-bottom:18px}
.hero-card h3{font-size:22px;color:#fff}
.hero-card .role{color:var(--gold-light);font-size:14px;margin-top:4px;letter-spacing:1px}
.hero-card ul{margin-top:18px;list-style:none;display:grid;gap:10px}
.hero-card li{font-size:14px;color:#d6e0ea;display:flex;gap:10px;align-items:flex-start}
.hero-card li::before{content:"✓";color:var(--gold-light);font-weight:800}

/* ===== 数据条 ===== */
.stats{background:var(--white);margin-top:-70px;position:relative;z-index:5;border-radius:18px;box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(4,1fr);overflow:hidden;border:1px solid var(--line)}
.stat{padding:32px 20px;text-align:center;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat .num{font-size:40px;font-weight:800;color:var(--navy);line-height:1}
.stat .num span{color:var(--gold);font-size:24px}
.stat .label{margin-top:10px;color:var(--muted);font-size:14px}

/* ===== 关于我 ===== */
.about{background:var(--bg)}
.about-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:56px;align-items:center;margin-top:46px}
.about-photo{position:relative;border-radius:20px;overflow:hidden;aspect-ratio:4/5;background:linear-gradient(135deg,var(--navy-2),var(--navy));display:grid;place-items:center;color:var(--gold-light);font-size:80px;font-weight:800;box-shadow:var(--shadow)}
.about-photo .tag{position:absolute;left:16px;bottom:16px;background:rgba(255,255,255,.92);color:var(--navy);font-size:13px;font-weight:700;padding:8px 14px;border-radius:10px}
.about-text h3{font-size:24px;color:var(--navy);margin-bottom:6px}
.about-text .sub{color:var(--gold);font-weight:600;margin-bottom:18px}
.about-text p{color:var(--muted);margin-bottom:16px}
.creds{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.cred{background:var(--white);border:1px solid var(--line);border-radius:10px;padding:10px 16px;font-size:14px;font-weight:600;color:var(--navy);box-shadow:var(--shadow-sm)}
.cred b{color:var(--gold)}

/* ===== Hero 增强 ===== */
.trust-chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.trust-chips .chip{font-size:13px;color:#d6e0ea;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:30px;padding:7px 15px}
.trust-chips .chip:first-child{color:var(--gold-light);border-color:rgba(227,201,135,.5);font-weight:700}
.hero-card .photo-wrap{position:relative;width:120px;height:120px;margin:0 auto 16px}
.hero-card .photo-wrap img{width:100%;height:100%;border-radius:50%;object-fit:cover;object-position:center top;border:3px solid var(--gold-light)}
.hero-card .badge{position:absolute;right:-4px;bottom:6px;background:linear-gradient(135deg,var(--gold),var(--gold-light));color:#2a1d05;font-size:11px;font-weight:800;padding:4px 10px;border-radius:20px;border:2px solid var(--navy);white-space:nowrap}
.hero-card .cert-mini{display:flex;justify-content:center;gap:8px;margin:16px 0 6px;flex-wrap:wrap}
.hero-card .cert-mini span{font-size:12px;font-weight:800;color:var(--gold-light);border:1px solid rgba(227,201,135,.4);border-radius:8px;padding:4px 10px}

/* ===== 资质背书条 ===== */
.cred-strip{background:linear-gradient(135deg,var(--navy-2),var(--navy));color:#fff;padding:76px 0}
.cred-head{text-align:center;max-width:740px;margin:0 auto}
.cred-head h2{font-size:30px;font-weight:800;color:#fff}
.cred-head p{color:#aebfd0;margin-top:12px;font-size:16px}
.cert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:46px}
.cert{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:30px 22px;text-align:center;transition:.25s}
.cert:hover{transform:translateY(-6px);border-color:var(--gold);box-shadow:0 18px 40px -18px rgba(0,0,0,.5)}
.cert-abbr{font-size:40px;font-weight:800;color:var(--gold-light);letter-spacing:1px}
.cert-cn{font-size:17px;font-weight:700;color:#fff;margin-top:12px}
.cert-en{font-size:11px;color:#9fb2c6;margin-top:6px;line-height:1.4}
.cert-desc{font-size:13px;color:#cdd9e6;margin-top:16px;padding-top:14px;border-top:1px solid rgba(255,255,255,.12)}

/* ===== 关于我 增强 ===== */
.about .pullquote{background:var(--white);border-left:4px solid var(--gold);border-radius:0 12px 12px 0;padding:20px 24px;color:var(--navy);font-size:17px;font-weight:600;line-height:1.7;margin-bottom:24px;box-shadow:var(--shadow-sm)}
.creds-title{font-size:15px;font-weight:700;color:var(--navy);margin:6px 0 14px}

/* ===== 服务 ===== */
.services-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:46px}
.svc{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:34px;transition:.25s;position:relative;overflow:hidden}
.svc::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--navy),var(--gold));transform:scaleX(0);transform-origin:left;transition:.3s}
.svc:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.svc:hover::before{transform:scaleX(1)}
.svc .icon{width:56px;height:56px;border-radius:14px;background:var(--bg-soft);display:grid;place-items:center;font-size:28px;margin-bottom:18px}
.svc h3{font-size:21px;color:var(--navy);margin-bottom:10px}
.svc p{color:var(--muted);font-size:15px}
.svc ul{margin-top:16px;list-style:none;display:grid;gap:8px}
.svc li{font-size:14px;color:var(--ink);padding-left:22px;position:relative}
.svc li::before{content:"▸";position:absolute;left:0;color:var(--gold);font-weight:800}

/* ===== 流程（四阶段服务体系） ===== */
.process{background:var(--navy);color:#fff}
.process .section-title{color:#fff}
.process .section-title::before{background:linear-gradient(var(--gold-light),var(--gold))}
.process .section-sub{color:#aebfd0}

.stage-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:50px}
.stage-tab{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:20px 18px;cursor:pointer;color:#cdd9e6;text-align:left;transition:.25s;display:flex;flex-direction:column;gap:6px}
.stage-tab:hover{border-color:rgba(227,201,135,.45);transform:translateY(-2px)}
.stage-tab .st-n{font-size:30px;font-weight:800;color:rgba(227,201,135,.4);line-height:1}
.stage-tab .st-t{font-size:16px;font-weight:700;color:#fff}
.stage-tab .st-sub{font-size:13px;color:#9fb2c6}
.stage-tab.active{background:linear-gradient(135deg,var(--navy-2),var(--blue));border-color:var(--gold);box-shadow:0 14px 34px -14px rgba(0,0,0,.5)}
.stage-tab.active .st-n{color:var(--gold-light)}

.stage-panel{display:none;margin-top:28px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:38px 40px}
.stage-panel.active{display:block;animation:stageIn .35s ease}
@keyframes stageIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}

.stage-head{display:flex;align-items:center;gap:16px;margin-bottom:26px;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.12);flex-wrap:wrap}
.stage-no{font-size:13px;font-weight:700;color:var(--navy);background:var(--gold-light);padding:6px 14px;border-radius:20px;white-space:nowrap}
.stage-head h3{font-size:23px;color:#fff;font-weight:800}

.stage-body .block{margin-bottom:26px}
.stage-body .block:last-child{margin-bottom:0}
.stage-body .block h4{font-size:18px;color:var(--gold-light);margin-bottom:10px;font-weight:700}
.stage-body .block p{color:#cdd9e6;font-size:15px}
.stage-body .sub2{color:#cdd9e6;font-size:15px;margin-bottom:10px}
.stage-body .sub2 b{color:#fff}
.stage-list{margin:0;padding-left:22px;color:#cdd9e6;font-size:15px;display:grid;gap:10px}
.stage-list li{margin-bottom:4px}
.stage-list li b{color:#fff}
.check-list{list-style:none;margin:14px 0 0;display:grid;gap:12px}
.check-list li{padding-left:32px;position:relative;color:#cdd9e6;font-size:15px}
.check-list li::before{content:"✓";position:absolute;left:0;top:1px;width:22px;height:22px;border-radius:50%;background:var(--gold);color:#2a1d05;display:grid;place-items:center;font-size:12px;font-weight:800}
.track-list{list-style:none;margin:14px 0 0;display:grid;gap:12px}
.track-list li{padding-left:24px;position:relative;color:#cdd9e6;font-size:15px}
.track-list li::before{content:"▸";position:absolute;left:0;color:var(--gold-light);font-weight:800;font-size:18px}
.track-list li b{color:#fff}

/* ===== 案例 ===== */
.cases-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:46px}
.case{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-sm);transition:.25s;display:flex;flex-direction:column}
.case:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.case .industry{display:inline-block;font-size:12px;color:#fff;background:var(--blue);padding:5px 12px;border-radius:20px;font-weight:600}
.case .case-tag{display:inline-block;font-size:13px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--navy),var(--navy-2));padding:6px 14px;border-radius:8px;letter-spacing:.5px}
.case .case-obj{margin-top:12px;font-size:13px;color:var(--muted);font-weight:600}
.case .case-block{margin-top:12px;font-size:14px;line-height:1.7;color:#3a4a5e}
.case .case-block .case-k{display:inline-block;font-weight:800;color:var(--navy);margin-right:6px}
.case .case-result{margin-top:14px;padding:14px 16px;background:linear-gradient(135deg,rgba(227,201,135,.16),rgba(227,201,135,.06));border-left:3px solid var(--gold);border-radius:8px;font-size:14px;line-height:1.7;color:var(--navy);font-weight:600}
.case .case-result .case-k{color:var(--gold-dark);font-weight:800}
.case h3{font-size:19px;color:var(--navy);margin:16px 0 6px}
.case .desc{color:var(--muted);font-size:14px;min-height:66px}
.case .metric{margin-top:18px;border-top:1px dashed var(--line);padding-top:16px;display:flex;justify-content:space-between;align-items:flex-end}
.case .metric .big{font-size:30px;font-weight:800;color:var(--gold)}
.case .metric .small{font-size:13px;color:var(--muted)}

/* ===== 评价 ===== */
.reviews{background:var(--bg)}
.reviews-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:46px}
.review{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px;position:relative}
.review .rev-head{display:flex;align-items:center;gap:10px;margin-bottom:2px}
.review .rev-num{width:26px;height:26px;border-radius:50%;background:var(--navy);color:var(--gold-light);display:grid;place-items:center;font-size:13px;font-weight:800;font-family:Georgia,serif}
.review .rev-tag{font-size:12px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--navy-2),var(--navy));padding:5px 12px;border-radius:999px;letter-spacing:.5px}
.review .quote{font-size:46px;color:var(--gold-light);position:absolute;top:14px;right:22px;font-family:Georgia,serif;line-height:1}
.review p{color:var(--ink);font-size:15px;margin-top:14px}
.review .who{margin-top:20px;display:flex;align-items:center;gap:12px}
.review .who .pic{width:44px;height:44px;border-radius:50%;background:var(--bg-soft);display:grid;place-items:center;color:var(--navy);font-weight:800}
.review .who .name{font-weight:700;color:var(--navy);font-size:15px}
.review .who .title{font-size:13px;color:var(--muted)}

/* ===== 为什么选我 ===== */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:46px}
.why{text-align:left;padding:28px 24px;border:1px solid var(--line);background:var(--white);border-radius:var(--radius);transition:.25s}
.why:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:transparent}
.why .ic{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,var(--gold-light),var(--gold));color:#fff;display:grid;place-items:center;margin:0 0 14px;font-size:16px;font-weight:800}
.why h4{color:var(--navy);font-size:17px;margin-bottom:8px;line-height:1.4}
.why p{color:var(--muted);font-size:14px;line-height:1.7}

/* ===== 博客 / 干货文章 ===== */
.blog{background:var(--white)}
.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:46px}
.post{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:.25s}
.post:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.post .cover{height:172px;background:linear-gradient(135deg,var(--navy-2),var(--navy));position:relative;display:grid;place-items:center;overflow:hidden}
.post .cover::before{content:"";position:absolute;width:200px;height:200px;right:-60px;top:-70px;background:radial-gradient(circle,rgba(227,201,135,.18),transparent 70%)}
.post .cover .cover-num{position:absolute;top:14px;left:18px;font-size:40px;font-weight:800;color:rgba(227,201,135,.26);letter-spacing:1px;font-family:Georgia,"Songti SC",serif;line-height:1}
.post .cover .cover-ico{width:60px;height:60px;color:var(--gold-light);position:relative}
.post .cover .cover-ico svg{width:100%;height:100%;display:block;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.post .body{padding:22px;flex:1;display:flex;flex-direction:column}
.post .cat{font-size:12px;color:var(--gold);font-weight:700;letter-spacing:1px}
.post h3{font-size:18px;color:var(--navy);margin:8px 0 10px;line-height:1.45}
.post p{color:var(--muted);font-size:14px;flex:1}
.post .more{margin-top:16px;color:var(--blue);font-weight:700;font-size:14px}

/* ===== 联系 ===== */
.contact{background:linear-gradient(135deg,var(--navy) 0%,#0a1c33 100%);color:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start}
.contact h2{font-size:34px;font-weight:800;letter-spacing:.5px}
.contact .sub{color:#aebfd0;margin-top:16px;max-width:440px}
.contact .info{margin-top:30px;display:grid;gap:16px}
.contact .info .row{display:flex;gap:14px;align-items:center;color:#d6e0ea}
.contact .info .ic{width:42px;height:42px;border-radius:10px;background:rgba(255,255,255,.08);display:grid;place-items:center;font-size:18px}
.form{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:18px;padding:30px}
.form label{display:block;font-size:14px;color:#cdd9e6;margin:0 0 6px}
.form input,.form textarea,.form select{width:100%;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);border-radius:10px;padding:12px 14px;color:#fff;font-size:15px;font-family:inherit;margin-bottom:16px;outline:none;transition:.2s}
.form input:focus,.form textarea:focus,.form select:focus{border-color:var(--gold-light)}
.form input::placeholder,.form textarea::placeholder{color:#7e93a8}
.form select option{color:#1a2330}
.form button{width:100%;background:linear-gradient(135deg,var(--gold),var(--gold-light));color:#2a1d05;border:none;padding:15px;border-radius:12px;font-size:16px;font-weight:800;cursor:pointer;transition:.2s}
.form button:hover{transform:translateY(-2px)}
.form button:disabled{opacity:.7;cursor:default;transform:none}
.form .note{font-size:12px;color:#7e93a8;margin-top:10px;text-align:center}

/* ===== 页脚 ===== */
footer{background:#081626;color:#8fa3b8;padding:40px 0;font-size:14px}
.foot-inner{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px}
.foot-inner a{color:#b9c8d8}
.foot-inner a:hover{color:var(--gold-light)}

/* ===== 文章页 ===== */
.article-page{background:var(--bg);padding:48px 0 96px;min-height:70vh}
.article-wrap{max-width:780px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:48px;box-shadow:var(--shadow-sm)}
.article-cat{color:var(--gold);font-weight:700;letter-spacing:1px;font-size:13px}
.article-wrap h1{font-size:32px;color:var(--navy);margin:12px 0 16px;line-height:1.35}
.article-meta{color:var(--muted);font-size:14px;margin-bottom:28px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.article-body h2{font-size:22px;color:var(--navy);margin:34px 0 12px}
.article-body h3{font-size:18px;color:var(--navy-2);margin:24px 0 10px}
.article-body p{color:var(--ink);margin-bottom:16px}
.article-body ul,.article-body ol{margin:0 0 16px 22px;color:var(--ink)}
.article-body li{margin-bottom:8px}
.article-body strong{color:var(--navy)}
.article-body .callout{background:var(--bg-soft);border-left:4px solid var(--gold);padding:16px 20px;border-radius:0 10px 10px 0;margin:22px 0;color:var(--ink);font-size:15px}
.article-body .callout strong{color:var(--navy-2)}
.back-link{display:inline-block;margin-bottom:8px;color:var(--blue);font-weight:600}
.back-link:hover{color:var(--gold)}
.article-foot{margin-top:40px;padding-top:28px;border-top:1px solid var(--line);text-align:center}
.article-foot p{color:var(--muted);font-size:15px;margin-bottom:18px}
.article-foot .btn{display:inline-flex}

/* ===== 滚动揭示动画 ===== */
.reveal{opacity:0;transform:translateY(28px);transition:.7s cubic-bezier(.2,.7,.3,1)}
.reveal.show{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:960px){
  .hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .stat:nth-child(2){border-right:none}
  .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
  .services-grid,.cases-grid,.reviews-grid,.why-grid,.blog-grid{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .stage-tabs{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
  .menu-btn{display:block}
  .hero h1{font-size:36px}
  .article-wrap{padding:28px}
}
@media(max-width:560px){
  .section{padding:64px 0}
  .section-title{font-size:26px}
  .steps{grid-template-columns:1fr}
  .stage-tabs{grid-template-columns:1fr}
  .stage-panel{padding:26px 22px}
  .stats{grid-template-columns:1fr}
  .cert-grid{grid-template-columns:1fr}
  .stat{border-right:none;border-bottom:1px solid var(--line)}
}

/* ===== 文章：相关阅读（内链，提升收录与停留） ===== */
.related{margin-top:40px;padding:28px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
.related h3{font-size:20px;color:var(--navy);margin:0 0 14px;padding-left:12px;border-left:4px solid var(--gold)}
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.rel-grid a{display:block;padding:14px 16px;background:var(--bg);border:1px solid var(--line);border-radius:12px;color:var(--ink);font-size:15px;font-weight:600;text-decoration:none;transition:.2s}
.rel-grid a:hover{border-color:var(--gold);color:var(--navy);transform:translateY(-2px)}
.rel-home{margin:16px 0 0}
.rel-home a{color:var(--blue);font-weight:600;text-decoration:none}
.rel-home a:hover{color:var(--gold)}
@media(max-width:560px){.rel-grid{grid-template-columns:1fr}}