/* ========================================
   丁亮亮律师 | 个人品牌网站
   风格：个性、自由、简约
   ======================================== */

:root {
  --bg-primary: #18181a;
  --bg-secondary: #222226;
  --bg-dark: #2a2a2e;
  --text-primary: #e4e4e7;
  --text-secondary: #a1a1aa;
  --text-light: #71717a;
  --text-on-dark: #e4e4e7;
  --accent: #d4a94e;
  --accent-light: #e0c06b;
  --accent-glow: rgba(212, 169, 78, 0.12);
  --border: #2e2e32;
  --border-light: #252528;
  --radius: 4px;
  --radius-lg: 8px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.45);
  --font-sans: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-serif: "Noto Serif SC","STSong","SimSun","Songti SC",serif;
  --transition: 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
  --max-width: 1140px;
  --nav-height: 72px;
}

/* Reset */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
body{font-family:var(--font-sans);color:var(--text-primary);background:var(--bg-primary);line-height:1.72;font-size:16px;overflow-x:hidden}
a{color:inherit;text-decoration:none;transition:color var(--transition)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{cursor:pointer;border:none;background:none;font-family:inherit;font-size:inherit}
input,textarea{font-family:inherit;font-size:inherit}

/* Container */
.container{width:100%;max-width:var(--max-width);margin:0 auto;padding:0 24px}

/* ========== Navigation ========== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-height);background:rgba(24,24,26,0.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border-light);transition:all var(--transition)}
.nav .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-logo{font-family:var(--font-serif);font-size:20px;font-weight:700;letter-spacing:1px;color:var(--text-primary)}
.nav-logo span{color:var(--accent)}
.nav-links{display:flex;gap:36px;align-items:center}
.nav-links a{font-size:15px;letter-spacing:0.5px;color:var(--text-secondary);position:relative;padding:4px 0}
.nav-links a::after{content:'';position:absolute;bottom:0;left:0;width:0;height:1.5px;background:var(--accent);transition:width var(--transition)}
.nav-links a:hover,.nav-links a.active{color:var(--text-primary)}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}

.nav-toggle{display:none;flex-direction:column;gap:5px;padding:4px}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--text-primary);transition:var(--transition)}

/* ========== Footer ========== */
.footer{background:var(--bg-dark);color:var(--text-on-dark);padding:60px 0 32px;margin-top:80px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:48px;margin-bottom:40px}
.footer-brand{font-family:var(--font-serif);font-size:24px;font-weight:700;letter-spacing:1px;margin-bottom:12px}
.footer-brand span{color:var(--accent-light)}
.footer-desc{color:rgba(240,236,230,0.6);font-size:14px;line-height:1.8;max-width:320px}
.footer-col h4{font-size:14px;letter-spacing:2px;text-transform:uppercase;color:rgba(240,236,230,0.5);margin-bottom:20px;font-weight:500}
.footer-col a{display:block;color:rgba(240,236,230,0.7);font-size:14px;margin-bottom:12px;transition:color var(--transition)}
.footer-col a:hover{color:var(--accent-light)}
.footer-bottom{border-top:1px solid rgba(240,236,230,0.1);padding-top:24px;display:flex;justify-content:space-between;align-items:center;font-size:13px;color:rgba(240,236,230,0.4)}
.footer-bottom a{color:rgba(240,236,230,0.5);transition:color var(--transition)}
.footer-bottom a:hover{color:var(--accent-light)}

/* ========== Hero ========== */
.hero{min-height:100vh;display:flex;align-items:center;padding:var(--nav-height) 0 60px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-120px;right:-120px;width:600px;height:600px;background:radial-gradient(circle,rgba(212,169,78,0.08) 0%,transparent 70%);pointer-events:none}
.hero-content{max-width:700px;position:relative;z-index:1}
.hero-tag{display:inline-block;font-size:13px;letter-spacing:3px;text-transform:uppercase;color:var(--accent);margin-bottom:24px;font-weight:500}
.hero-title{font-family:var(--font-serif);font-size:clamp(36px,6vw,64px);font-weight:700;line-height:1.15;letter-spacing:-0.5px;margin-bottom:24px}
.hero-title em{font-style:normal;color:var(--accent)}
.hero-subtitle{font-size:18px;color:var(--text-secondary);line-height:1.8;margin-bottom:40px;max-width:520px}
.hero-cta{display:inline-flex;align-items:center;gap:12px;padding:14px 36px;background:var(--accent);color:#111;font-size:15px;letter-spacing:1px;border-radius:var(--radius);transition:all var(--transition);font-weight:600}
.hero-cta:hover{background:var(--accent-light);transform:translateY(-2px);box-shadow:0 8px 24px rgba(212,169,78,0.2)}
.hero-secondary{margin-left:16px;display:inline-flex;align-items:center;gap:8px;padding:14px 36px;border:1px solid var(--text-light);color:var(--text-secondary);font-size:15px;letter-spacing:1px;border-radius:var(--radius);transition:all var(--transition)}
.hero-secondary:hover{border-color:var(--accent);color:var(--accent)}

/* ========== Section Common ========== */
.section{padding:100px 0}
.section-header{text-align:center;margin-bottom:64px}
.section-label{font-size:13px;letter-spacing:3px;text-transform:uppercase;color:var(--accent);margin-bottom:16px;font-weight:500}
.section-title{font-family:var(--font-serif);font-size:clamp(28px,4vw,40px);font-weight:700;letter-spacing:-0.3px;margin-bottom:16px}
.section-desc{font-size:16px;color:var(--text-secondary);max-width:560px;margin:0 auto}

/* ========== Service Cards ========== */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.service-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px 32px;transition:all var(--transition);position:relative;overflow:hidden}
.service-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:3px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform var(--transition)}
.service-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.service-card:hover::before{transform:scaleX(1)}
.service-icon{font-size:32px;margin-bottom:20px;display:block}
.service-card h3{font-family:var(--font-serif);font-size:19px;font-weight:600;margin-bottom:12px;letter-spacing:0.5px}
.service-card p{font-size:14px;color:var(--text-secondary);line-height:1.8}
.service-card .card-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:13px;color:var(--accent);letter-spacing:1px;font-weight:500;transition:gap var(--transition)}
.service-card .card-link:hover{gap:12px}
.service-card .card-arrow{transition:transform var(--transition)}

/* ========== About Page ========== */
.about-hero{padding:calc(var(--nav-height) + 80px) 0 60px;text-align:center}
.about-hero .section-label{margin-bottom:16px}
.about-hero .section-title{margin-bottom:12px}
.about-intro{max-width:680px;margin:0 auto;font-size:17px;color:var(--text-secondary);line-height:1.9}

.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;margin-top:64px}
.about-block{margin-bottom:48px}
.about-block h3{font-family:var(--font-serif);font-size:22px;font-weight:600;margin-bottom:20px;display:flex;align-items:center;gap:10px}
.about-block h3::before{content:'';width:4px;height:22px;background:var(--accent);border-radius:2px}
.about-block p,.about-block li{font-size:15px;color:var(--text-secondary);line-height:1.9}

.about-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin:32px 0}
.stat-card{text-align:center;padding:24px;background:var(--bg-secondary);border-radius:var(--radius-lg)}
.stat-number{font-family:var(--font-serif);font-size:36px;font-weight:700;color:var(--accent);line-height:1}
.stat-label{font-size:13px;color:var(--text-light);margin-top:8px;letter-spacing:1px}

/* Quote */
.quote-block{background:var(--bg-dark);color:var(--text-on-dark);padding:48px;border-radius:var(--radius-lg);margin:48px 0;position:relative}
.quote-block::before{content:'\201C';font-family:var(--font-serif);position:absolute;top:16px;left:24px;font-size:72px;color:rgba(255,255,255,0.06);line-height:1}
.quote-block p{font-family:var(--font-serif);font-size:20px;line-height:1.7;position:relative;z-index:1}
.quote-block .quote-author{font-size:13px;color:rgba(240,236,230,0.5);margin-top:16px;letter-spacing:1px}

/* Article & Case list */
.doc-list{margin-top:24px}
.doc-item{padding:20px 0;border-bottom:1px solid var(--border-light)}
.doc-item:last-child{border-bottom:none}
.doc-item h4{font-size:16px;font-weight:600;margin-bottom:6px;letter-spacing:0.3px}
.doc-item p{font-size:13px;color:var(--text-light);line-height:1.7;margin-bottom:8px}
.doc-item a{font-size:12px;color:var(--accent);letter-spacing:1px;display:inline-flex;align-items:center;gap:4px;transition:gap var(--transition)}
.doc-item a:hover{gap:8px}

/* Tags / Hobbies */
.tag-list{display:flex;flex-wrap:wrap;gap:10px}
.tag{display:inline-block;padding:6px 16px;background:var(--bg-secondary);font-size:13px;border-radius:20px;color:var(--text-secondary);letter-spacing:0.5px;transition:all var(--transition)}
.tag:hover{background:var(--accent);color:#111}

/* ========== Services Page ========== */
.services-list{max-width:900px;margin:0 auto}
.service-item{display:grid;grid-template-columns:200px 1fr;gap:40px;padding:48px 0;border-bottom:1px solid var(--border);align-items:start}
.service-item:last-child{border-bottom:none}
.service-item-num{font-family:var(--font-serif);font-size:14px;color:var(--accent);letter-spacing:2px}
.service-item h2{font-family:var(--font-serif);font-size:24px;font-weight:600;margin-bottom:16px;letter-spacing:0.5px}
.service-item p{font-size:15px;color:var(--text-secondary);line-height:1.9;margin-bottom:16px}
.service-item ul{display:flex;flex-wrap:wrap;gap:8px}
.service-item ul li{padding:5px 14px;background:var(--bg-secondary);font-size:13px;border-radius:20px;color:var(--text-secondary)}

/* ========== Contact Page ========== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:start}
.contact-info h2{font-family:var(--font-serif);font-size:28px;font-weight:600;margin-bottom:24px}
.contact-info .firm-name{font-size:18px;font-weight:600;color:var(--accent);margin-bottom:8px}
.contact-info .firm-desc{font-size:14px;color:var(--text-secondary);line-height:1.9;margin-bottom:32px}
.contact-item{display:flex;align-items:center;gap:14px;margin-bottom:18px;font-size:15px}
.contact-item .contact-icon{font-size:18px;min-width:24px}
.contact-item a{color:var(--accent);border-bottom:1px solid transparent;transition:border-color var(--transition)}
.contact-item a:hover{border-color:var(--accent)}

/* Contact Form */
.contact-form{background:var(--bg-secondary);padding:40px;border-radius:var(--radius-lg);box-shadow:var(--shadow-md);border:1px solid var(--border)}
.contact-form h3{font-family:var(--font-serif);font-size:20px;font-weight:600;margin-bottom:24px}
.form-group{margin-bottom:20px}
.form-group label{display:block;font-size:13px;font-weight:500;letter-spacing:1px;margin-bottom:8px;color:var(--text-secondary)}
.form-group input,.form-group textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius);font-size:15px;color:var(--text-primary);background:var(--bg-primary);transition:border-color var(--transition);outline:none}
.form-group input:focus,.form-group textarea:focus{border-color:var(--accent)}
.form-group textarea{min-height:140px;resize:vertical}
.form-submit{width:100%;padding:14px;background:var(--accent);color:#111;font-size:15px;letter-spacing:1px;border-radius:var(--radius);transition:all var(--transition);font-weight:600}
.form-submit:hover{background:var(--accent-light)}
.form-result{margin-top:16px;padding:14px;border-radius:var(--radius);font-size:14px;text-align:center;display:none}
.form-result.success{display:block;background:rgba(46,160,67,0.12);color:#3fb950;border:1px solid rgba(46,160,67,0.25)}
.form-result.error{display:block;background:rgba(220,53,69,0.12);color:#f85149;border:1px solid rgba(220,53,69,0.25)}

/* ========== Page Banner ========== */
.page-banner{padding:calc(var(--nav-height) + 80px) 0 40px;text-align:center}
.page-banner .section-label{margin-bottom:12px}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .nav-links{position:fixed;top:var(--nav-height);left:0;right:0;background:var(--bg-secondary);flex-direction:column;padding:24px;gap:20px;border-bottom:1px solid var(--border);transform:translateY(-100%);opacity:0;pointer-events:none;transition:all var(--transition)}
  .nav-links.open{transform:translateY(0);opacity:1;pointer-events:all}
  .nav-toggle{display:flex}
  .services-grid{grid-template-columns:1fr}
  .about-grid{grid-template-columns:1fr;gap:40px}
  .service-item{grid-template-columns:1fr;gap:16px}
  .contact-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;gap:12px;text-align:center}
  .hero-secondary{margin-left:0;margin-top:12px;display:flex}
  .about-stats{grid-template-columns:repeat(3,1fr);gap:12px}
  .stat-number{font-size:28px}
  .section{padding:64px 0}
}

@media (max-width: 480px) {
  .hero-title{font-size:32px}
  .hero-subtitle{font-size:16px}
  .hero-cta,.hero-secondary{width:100%;justify-content:center}
  .hero-secondary{margin-left:0;margin-top:12px}
  .about-stats{grid-template-columns:1fr}
  .quote-block{padding:32px 24px}
  .quote-block p{font-size:17px}
  .contact-form{padding:24px}
}