/* ============================================
   铭赞网络 - 主样式表
   设计语言:深空蓝 + 科技青 + 暖金
   风格:简约大气、商务质感
   ============================================ */

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px;-webkit-text-size-adjust:100%}
body{font-family:'Noto Sans SC','Inter',-apple-system,BlinkMacSystemFont,'PingFang SC','Microsoft YaHei',sans-serif;font-size:16px;line-height:1.6;color:#1a1a1a;background:#ffffff;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none;transition:color .3s}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{list-style:none}

/* CSS 变量 */
:root{
  --c-bg:#ffffff;
  --c-bg-alt:#f7f9fc;
  --c-bg-dark:#0a1a2f;
  --c-bg-darker:#061321;
  --c-text:#1a1a1a;
  --c-text-light:#6b7280;
  --c-text-muted:#9ca3af;
  --c-border:#e5e7eb;
  --c-border-light:#f0f2f5;
  --c-primary:#0a1a2f;
  --c-accent:#00d4ff;
  --c-accent-dark:#00a8cc;
  --c-gold:#d4a574;
  --c-gold-dark:#b8895a;
  --c-danger:#e63946;
  --c-success:#10b981;
  --shadow-sm:0 2px 8px rgba(10,26,47,.04);
  --shadow-md:0 8px 24px rgba(10,26,47,.08);
  --shadow-lg:0 16px 48px rgba(10,26,47,.12);
  --shadow-xl:0 24px 64px rgba(10,26,47,.16);
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:24px;
  --radius-full:999px;
  --container:1280px;
  --duration:.3s;
  --easing:cubic-bezier(.4,0,.2,1);
}

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

/* 通用区段 */
.section{padding:120px 0;position:relative}
.section-head{text-align:center;max-width:760px;margin:0 auto 64px}
.section-head--light .section-eyebrow,
.section-head--light .section-title,
.section-head--light .section-lead{color:#ffffff}
.section-head--light .section-lead{color:rgba(255,255,255,.7)}
.section-eyebrow{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.2em;color:var(--c-accent);margin-bottom:16px;text-transform:uppercase;position:relative;padding:0 24px}
.section-eyebrow::before,.section-eyebrow::after{content:'';position:absolute;top:50%;width:16px;height:1px;background:var(--c-accent)}
.section-eyebrow::before{left:0}
.section-eyebrow::after{right:0}
.section-title{font-size:42px;font-weight:700;color:var(--c-primary);letter-spacing:-.02em;line-height:1.25;margin-bottom:20px}
.section-lead{font-size:17px;color:var(--c-text-light);line-height:1.75}

/* 通用按钮 */
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 28px;border-radius:var(--radius-full);font-size:15px;font-weight:500;cursor:pointer;transition:all .3s var(--easing);border:1.5px solid transparent;white-space:nowrap}
.btn-primary{background:#ffffff;color:var(--c-primary);border-color:#ffffff;box-shadow:0 4px 20px rgba(0,212,255,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px rgba(0,212,255,.5);background:var(--c-accent);color:#ffffff;border-color:var(--c-accent)}
.btn-ghost{background:transparent;color:#ffffff;border-color:rgba(255,255,255,.3)}
.btn-ghost:hover{border-color:#ffffff;background:rgba(255,255,255,.08)}

/* ========== Hero + 导航 ========== */
.hero{position:relative;min-height:100vh;background:linear-gradient(135deg,#0a1a2f 0%,#0e2842 50%,#0a1a2f 100%);color:#ffffff;overflow:hidden;display:flex;flex-direction:column}
.hero-bg{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(0,212,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(0,212,255,.04) 1px,transparent 1px);background-size:60px 60px;mask-image:radial-gradient(ellipse at center,#000 30%,transparent 80%)}
.hero-orb{position:absolute;border-radius:50%;filter:blur(80px);opacity:.5;animation:float 20s infinite ease-in-out}
.hero-orb-1{width:500px;height:500px;background:radial-gradient(circle,rgba(0,212,255,.4),transparent 70%);top:-200px;right:-100px;animation-delay:0s}
.hero-orb-2{width:400px;height:400px;background:radial-gradient(circle,rgba(212,165,116,.3),transparent 70%);bottom:-100px;left:-50px;animation-delay:-7s}
.hero-orb-3{width:350px;height:350px;background:radial-gradient(circle,rgba(0,212,255,.2),transparent 70%);top:40%;left:30%;animation-delay:-14s}

@keyframes float{
  0%,100%{transform:translate(0,0) scale(1)}
  33%{transform:translate(30px,-30px) scale(1.05)}
  66%{transform:translate(-30px,30px) scale(.95)}
}

/* 导航 */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:16px 0;transition:all .4s var(--easing);backdrop-filter:blur(0px);background:transparent}
.nav.scrolled{background:rgba(10,26,47,.95);backdrop-filter:blur(20px);box-shadow:0 4px 20px rgba(0,0,0,.1);padding:12px 0}
.nav-inner{max-width:var(--container);margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:32px}
.logo{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:700;color:#ffffff;letter-spacing:.02em;white-space:nowrap;flex-shrink:0}
.logo-main{display:inline-flex;align-items:flex-start;gap:2px}
.logo-r{font-size:11px;color:var(--c-gold);font-weight:500;margin-top:2px}
.logo-divider{color:rgba(255,255,255,.4);font-weight:300}
.logo-sub{font-size:14px;font-weight:400;color:rgba(255,255,255,.7);letter-spacing:.05em}
.nav-menu{display:flex;align-items:center;gap:4px;margin:0 auto}
.nav-link{position:relative;display:inline-block;padding:8px 14px;font-size:14px;font-weight:500;color:rgba(255,255,255,.75);transition:color .3s;border-radius:var(--radius-sm)}
.nav-link:hover{color:#ffffff}
.nav-link.active{color:#ffffff}
.nav-link::after{content:'';position:absolute;left:50%;bottom:0;width:0;height:2px;background:var(--c-accent);transition:all .3s var(--easing);transform:translateX(-50%)}
.nav-link:hover::after,.nav-link.active::after{width:24px}
.nav-cta{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:linear-gradient(135deg,var(--c-accent),var(--c-accent-dark));color:#ffffff;border-radius:var(--radius-full);font-size:14px;font-weight:600;transition:all .3s;white-space:nowrap;box-shadow:0 4px 16px rgba(0,212,255,.3)}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(0,212,255,.5)}
.nav-toggle{display:none;width:32px;height:32px;flex-direction:column;justify-content:center;gap:5px}
.nav-toggle span{display:block;width:24px;height:2px;background:#ffffff;border-radius:2px;transition:all .3s}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* Hero 内容 */
.hero-content{flex:1;display:flex;align-items:center;padding-top:120px;padding-bottom:80px;position:relative;z-index:2}
.hero-tag{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;background:rgba(0,212,255,.1);border:1px solid rgba(0,212,255,.3);border-radius:var(--radius-full);font-size:13px;color:var(--c-accent);font-weight:500;margin-bottom:28px}
.hero-tag-dot{width:6px;height:6px;border-radius:50%;background:var(--c-accent);box-shadow:0 0 8px var(--c-accent);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero-title{font-size:clamp(40px,5.5vw,68px);font-weight:800;line-height:1.15;letter-spacing:-.03em;margin-bottom:28px;color:#ffffff;max-width:900px}
.hero-title-line{display:block}
.hero-title em{font-style:normal;color:var(--c-accent);position:relative;background:linear-gradient(135deg,var(--c-accent),var(--c-gold));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero-sub{font-size:18px;line-height:1.8;color:rgba(255,255,255,.75);margin-bottom:40px;max-width:780px}
.hero-sub strong{color:var(--c-accent);font-weight:600}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:56px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px}
.hero-tags li{padding:8px 16px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-full);font-size:13px;color:rgba(255,255,255,.75);transition:all .3s}
.hero-tags li:hover{background:rgba(0,212,255,.1);border-color:rgba(0,212,255,.3);color:var(--c-accent)}
.hero-scroll{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);z-index:3}
.hero-scroll span{display:block;width:24px;height:38px;border:2px solid rgba(255,255,255,.3);border-radius:var(--radius-full);position:relative}
.hero-scroll span::before{content:'';position:absolute;top:8px;left:50%;width:4px;height:8px;background:var(--c-accent);border-radius:2px;transform:translateX(-50%);animation:scroll-anim 2s infinite}
@keyframes scroll-anim{0%{top:8px;opacity:1}100%{top:20px;opacity:0}}

/* ========== 核心服务 ========== */
.section-services{background:var(--c-bg)}
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.service-card{position:relative;background:#ffffff;border:1px solid var(--c-border);border-radius:var(--radius-lg);padding:48px 40px;transition:all .4s var(--easing);overflow:hidden}
.service-card::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,212,255,.04),transparent);opacity:0;transition:opacity .4s}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:rgba(0,212,255,.3)}
.service-card:hover::before{opacity:1}
.service-card--feature{background:linear-gradient(160deg,#0a1a2f 0%,#0e2842 100%);color:#ffffff;border-color:transparent;position:relative;overflow:hidden}
.service-card--feature::after{content:'';position:absolute;top:0;right:0;width:200px;height:200px;background:radial-gradient(circle,rgba(0,212,255,.15),transparent 70%);border-radius:50%;transform:translate(50%,-50%)}
.service-card--feature .service-name,
.service-card--feature .service-desc,
.service-card--feature .service-list{color:#ffffff}
.service-card--feature .service-desc{color:rgba(255,255,255,.7)}
.service-card--feature .service-list li{color:rgba(255,255,255,.85)}
.service-card--feature .service-list li::before{background:var(--c-accent)}
.service-card--feature .service-num{color:rgba(255,255,255,.3)}
.service-card--feature .service-icon{background:rgba(0,212,255,.1);color:var(--c-accent)}
.service-card--feature .service-link{color:var(--c-accent)}
.service-card--feature .service-link:hover{color:#ffffff}
.service-badge{position:absolute;top:20px;right:20px;z-index:2;padding:5px 12px;background:linear-gradient(135deg,var(--c-accent),var(--c-accent-dark));color:#ffffff;font-size:11px;font-weight:600;border-radius:var(--radius-full);letter-spacing:.05em}
.service-icon{width:64px;height:64px;display:flex;align-items:center;justify-content:center;background:rgba(0,212,255,.08);color:var(--c-accent);border-radius:var(--radius-md);margin-bottom:24px;transition:all .4s}
.service-icon svg{width:36px;height:36px}
.service-card:hover .service-icon{background:rgba(0,212,255,.15);transform:scale(1.05)}
.service-num{position:absolute;top:32px;right:36px;font-size:48px;font-weight:800;color:rgba(10,26,47,.06);line-height:1;letter-spacing:-.04em}
.service-name{font-size:24px;font-weight:700;color:var(--c-primary);margin-bottom:14px;letter-spacing:-.01em;position:relative;z-index:1}
.service-desc{font-size:14px;line-height:1.75;color:var(--c-text-light);margin-bottom:24px;position:relative;z-index:1}
.service-list{margin-bottom:28px;position:relative;z-index:1}
.service-list li{position:relative;padding-left:22px;font-size:14px;color:var(--c-text);margin-bottom:8px;line-height:1.6}
.service-list li::before{content:'';position:absolute;left:0;top:9px;width:14px;height:2px;background:var(--c-accent);border-radius:1px}
.service-link{font-size:14px;font-weight:600;color:var(--c-accent);display:inline-flex;align-items:center;gap:4px;transition:all .3s;position:relative;z-index:1}
.service-link:hover{color:var(--c-accent-dark);gap:8px}

/* ========== 15 年+ 行业实力 ========== */
.section-strength{background:linear-gradient(160deg,#0a1a2f 0%,#0e2842 50%,#0a1a2f 100%);color:#ffffff;position:relative;overflow:hidden}
.strength-bg{position:absolute;inset:0;background-image:radial-gradient(circle at 20% 20%,rgba(0,212,255,.1) 0%,transparent 40%),radial-gradient(circle at 80% 80%,rgba(212,165,116,.08) 0%,transparent 40%);pointer-events:none}
.strength-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:96px;position:relative;z-index:1}
.stat-item{text-align:center;padding:40px 20px;background:rgba(255,255,255,.03);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-md);transition:all .3s;backdrop-filter:blur(10px)}
.stat-item:hover{background:rgba(255,255,255,.05);border-color:rgba(0,212,255,.3);transform:translateY(-4px)}
.stat-num{font-size:60px;font-weight:800;background:linear-gradient(135deg,var(--c-accent),#ffffff);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1;letter-spacing:-.03em;display:inline-block}
.stat-suffix{font-size:24px;font-weight:600;color:var(--c-gold);margin-left:4px;display:inline-block;vertical-align:top;line-height:1.4;margin-top:6px}
.stat-label{font-size:14px;color:rgba(255,255,255,.7);margin-top:12px;letter-spacing:.05em}

.timeline{position:relative;max-width:900px;margin:0 auto;padding:0 20px;z-index:1}
.timeline::before{content:'';position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(180deg,transparent,var(--c-accent),var(--c-gold),transparent);transform:translateX(-50%)}
.timeline-item{position:relative;width:50%;padding:30px 50px;margin-bottom:0}
.timeline-item:nth-child(odd){left:0;text-align:right}
.timeline-item:nth-child(even){left:50%}
.timeline-item::before{content:'';position:absolute;width:16px;height:16px;background:var(--c-accent);border:3px solid var(--c-bg-dark);border-radius:50%;top:42px;z-index:2;box-shadow:0 0 0 4px rgba(0,212,255,.2)}
.timeline-item:nth-child(odd)::before{right:-8px}
.timeline-item:nth-child(even)::before{left:-8px}
.timeline-year{display:inline-block;padding:6px 16px;background:linear-gradient(135deg,var(--c-accent),var(--c-accent-dark));color:#ffffff;font-size:18px;font-weight:700;border-radius:var(--radius-full);margin-bottom:12px;letter-spacing:.05em}
.timeline-body{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);padding:20px 24px;border-radius:var(--radius-md);transition:all .3s;backdrop-filter:blur(10px)}
.timeline-item:hover .timeline-body{background:rgba(255,255,255,.08);border-color:rgba(0,212,255,.3);transform:scale(1.02)}
.timeline-body h4{font-size:18px;font-weight:600;color:#ffffff;margin-bottom:6px}
.timeline-body p{font-size:14px;color:rgba(255,255,255,.7);line-height:1.7}

/* ========== 服务流程 ========== */
.section-process{background:var(--c-bg-alt)}
.process-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px;position:relative}
.process-item{position:relative;text-align:center;padding:32px 16px;background:#ffffff;border-radius:var(--radius-md);border:1px solid var(--c-border-light);transition:all .3s}
.process-item:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:rgba(0,212,255,.3)}
.process-num{width:48px;height:48px;background:linear-gradient(135deg,var(--c-primary),#1a2f4a);color:#ffffff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;margin:0 auto 16px;position:relative}
.process-item:hover .process-num{background:linear-gradient(135deg,var(--c-accent),var(--c-accent-dark))}
.process-item h4{font-size:16px;font-weight:600;color:var(--c-primary);margin-bottom:8px}
.process-item p{font-size:13px;color:var(--c-text-light);line-height:1.6}

/* ========== 行业方案 ========== */
.section-industries{background:#ffffff}
.industries-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.industry-card{display:block;padding:40px 32px;background:linear-gradient(135deg,var(--c-bg-alt),#ffffff);border:1px solid var(--c-border-light);border-radius:var(--radius-md);transition:all .4s var(--easing);position:relative;overflow:hidden}
.industry-card::before{content:'';position:absolute;top:0;left:0;width:0;height:3px;background:linear-gradient(90deg,var(--c-accent),var(--c-gold));transition:width .4s}
.industry-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-md);border-color:transparent}
.industry-card:hover::before{width:100%}
.industry-icon{font-size:36px;margin-bottom:20px;display:inline-block;transition:transform .4s}
.industry-card:hover .industry-icon{transform:scale(1.15) rotate(-5deg)}
.industry-card h4{font-size:20px;font-weight:600;color:var(--c-primary);margin-bottom:8px}
.industry-card p{font-size:14px;color:var(--c-text-light)}

/* ========== FAQ ========== */
.section-faq{background:var(--c-bg-alt)}
.faq-list{max-width:960px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#ffffff;border:1px solid var(--c-border-light);border-radius:var(--radius-md);overflow:hidden;transition:all .3s}
.faq-item[open]{box-shadow:var(--shadow-sm);border-color:rgba(0,212,255,.2)}
.faq-item:hover{border-color:rgba(0,212,255,.3)}
.faq-q{display:flex;align-items:center;gap:20px;padding:24px 32px;cursor:pointer;list-style:none;user-select:none;transition:background .3s}
.faq-q::-webkit-details-marker{display:none}
.faq-q:hover{background:rgba(0,212,255,.02)}
.faq-num{flex-shrink:0;width:48px;height:48px;background:linear-gradient(135deg,var(--c-accent),var(--c-accent-dark));color:#ffffff;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;letter-spacing:.05em}
.faq-item[open] .faq-num{background:linear-gradient(135deg,var(--c-primary),#1a2f4a)}
.faq-title{flex:1;font-size:16px;font-weight:600;color:var(--c-primary);line-height:1.5}
.faq-toggle{flex-shrink:0;width:28px;height:28px;position:relative;border-radius:50%;background:var(--c-bg-alt);transition:all .3s}
.faq-toggle::before,.faq-toggle::after{content:'';position:absolute;top:50%;left:50%;width:12px;height:2px;background:var(--c-primary);transform:translate(-50%,-50%);transition:all .3s}
.faq-toggle::after{transform:translate(-50%,-50%) rotate(90deg)}
.faq-item[open] .faq-toggle{background:var(--c-accent)}
.faq-item[open] .faq-toggle::before,.faq-item[open] .faq-toggle::after{background:#ffffff}
.faq-item[open] .faq-toggle::after{opacity:0}
.faq-a{padding:0 32px 28px 100px;color:var(--c-text-light);line-height:1.85;font-size:15px}
.faq-a p{position:relative;padding:20px 24px;background:var(--c-bg-alt);border-left:3px solid var(--c-accent);border-radius:0 var(--radius-sm) var(--radius-sm) 0}
.faq-a a{color:var(--c-accent);font-weight:600;border-bottom:1px solid currentColor}

/* ========== 联系方式 ========== */
.section-contact{background:#ffffff}
.contact-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:64px;align-items:center;max-width:1100px;margin:0 auto}
.contact-info{display:flex;flex-direction:column;gap:24px}
.contact-item{display:flex;align-items:center;gap:20px;padding:20px 24px;background:var(--c-bg-alt);border:1px solid var(--c-border-light);border-radius:var(--radius-md);transition:all .3s}
.contact-item:hover{background:#ffffff;border-color:rgba(0,212,255,.3);transform:translateX(4px);box-shadow:var(--shadow-sm)}
.contact-icon{flex-shrink:0;width:48px;height:48px;background:linear-gradient(135deg,var(--c-accent),var(--c-accent-dark));color:#ffffff;border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;box-shadow:0 4px 12px rgba(0,212,255,.25)}
.contact-icon svg{width:22px;height:22px}
.contact-text{flex:1;min-width:0}
.contact-label{font-size:12px;color:var(--c-text-muted);letter-spacing:.05em;margin-bottom:4px}
.contact-value{font-size:16px;font-weight:600;color:var(--c-primary);line-height:1.4;word-break:break-all}
.contact-link{transition:color .3s}
.contact-link:hover{color:var(--c-accent)}

.contact-qr{display:flex;justify-content:center}
.qr-card{text-align:center;padding:32px;background:linear-gradient(135deg,#ffffff,var(--c-bg-alt));border:1px solid var(--c-border-light);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);position:relative;overflow:hidden}
.qr-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--c-accent),var(--c-gold))}
.qr-frame{width:200px;height:200px;margin:0 auto 20px;padding:8px;background:#ffffff;border:2px solid var(--c-border);border-radius:var(--radius-md);box-shadow:0 8px 20px rgba(10,26,47,.08)}
.qr-frame img{width:100%;height:100%;object-fit:contain}
.qr-tip{font-size:18px;font-weight:600;color:var(--c-primary);margin-bottom:4px}
.qr-sub{font-size:13px;color:var(--c-text-light)}

/* ========== 业务外链 ========== */
.section-links{background:linear-gradient(180deg,var(--c-bg-alt) 0%,#ffffff 100%)}
.links-group{margin-bottom:48px}
.links-group:last-child{margin-bottom:0}
.links-group-title{font-size:20px;font-weight:600;color:var(--c-primary);margin-bottom:20px;padding-left:16px;position:relative}
.links-group-title::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:18px;background:linear-gradient(180deg,var(--c-accent),var(--c-gold));border-radius:2px}
.links-cloud{display:flex;flex-wrap:wrap;gap:10px}
.link-tag{display:inline-block;padding:10px 18px;background:#ffffff;border:1px solid var(--c-border);border-radius:var(--radius-full);font-size:14px;color:var(--c-text);transition:all .3s}
.link-tag:hover{background:linear-gradient(135deg,var(--c-accent),var(--c-accent-dark));color:#ffffff;border-color:transparent;transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,212,255,.3)}

/* ========== 底部 ========== */
.footer{background:var(--c-bg-darker);color:rgba(255,255,255,.7);padding:80px 0 0;position:relative;overflow:hidden}
.footer::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--c-accent),var(--c-gold),transparent)}
.footer-main{display:grid;grid-template-columns:2fr 1fr 1fr 1.2fr;gap:48px;padding-bottom:60px}
.footer-brand{max-width:360px}
.footer-logo{font-size:20px;font-weight:700;color:#ffffff;margin-bottom:20px;display:inline-flex;align-items:center;gap:6px}
.footer-logo sup{font-size:11px;color:var(--c-gold);font-weight:500}
.footer-logo span{color:rgba(255,255,255,.4);font-weight:300;margin:0 4px}
.footer-desc{font-size:14px;line-height:1.75;color:rgba(255,255,255,.55);margin-bottom:24px}
.footer-social{display:flex;gap:10px}
.social-btn{width:40px;height:40px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;color:rgba(255,255,255,.7);transition:all .3s}
.social-btn:hover{background:var(--c-accent);border-color:var(--c-accent);color:#ffffff;transform:translateY(-2px)}
.social-btn svg{width:18px;height:18px}
.footer-col h5{font-size:15px;font-weight:600;color:#ffffff;margin-bottom:20px;letter-spacing:.05em}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{font-size:14px;color:rgba(255,255,255,.6);transition:color .3s}
.footer-col ul a:hover{color:var(--c-accent)}
.footer-contact li{font-size:14px;color:rgba(255,255,255,.6);line-height:1.8}
.footer-bottom{padding:24px 0;border-top:1px solid rgba(255,255,255,.08);text-align:center}
.footer-bottom p{font-size:13px;color:rgba(255,255,255,.5);line-height:1.8}
.footer-bottom a{color:rgba(255,255,255,.7);transition:color .3s}
.footer-bottom a:hover{color:var(--c-accent)}
.beian{position:relative;padding-left:24px}
.beian::before{content:'';position:absolute;left:8px;top:50%;transform:translateY(-50%);width:16px;height:16px;background:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23e63946'%3E%3Cpath d='M12 1L3 5v6c0 5.5 3.8 10.7 9 12 5.2-1.3 9-6.5 9-12V5l-9-4z'/%3E%3C/svg%3E") center/contain no-repeat}

/* ========== 浮动按钮 ========== */
.floating{position:fixed;right:24px;bottom:24px;display:flex;flex-direction:column;gap:12px;z-index:90}
.floating-btn{display:flex;align-items:center;gap:8px;padding:12px 18px;background:rgba(10,26,47,.95);color:#ffffff;border-radius:var(--radius-full);box-shadow:0 8px 24px rgba(10,26,47,.25);font-size:14px;font-weight:500;transition:all .3s;backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}
.floating-btn:hover{transform:translateX(-4px) translateY(-2px);box-shadow:0 12px 32px rgba(0,212,255,.3);background:var(--c-accent);border-color:var(--c-accent)}
.floating-btn svg{width:18px;height:18px;flex-shrink:0}
.floating-btn--primary{background:linear-gradient(135deg,var(--c-accent),var(--c-accent-dark));border-color:transparent}
.floating-btn--qr{cursor:pointer}

/* 二维码弹层 */
.qr-modal{position:fixed;inset:0;z-index:200;display:flex;align-items:center;justify-content:center}
.qr-modal[hidden]{display:none}
.qr-modal-mask{position:absolute;inset:0;background:rgba(10,26,47,.8);backdrop-filter:blur(8px)}
.qr-modal-body{position:relative;padding:32px;background:#ffffff;border-radius:var(--radius-lg);text-align:center;max-width:90vw;box-shadow:0 24px 64px rgba(0,0,0,.3);animation:modalIn .3s var(--easing)}
@keyframes modalIn{from{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}
.qr-modal-body img{width:240px;height:240px;border-radius:var(--radius-md);margin-bottom:16px;object-fit:contain;border:1px solid var(--c-border)}
.qr-modal-body p{font-size:15px;color:var(--c-primary);font-weight:500}
.qr-modal-close{position:absolute;top:12px;right:12px;width:32px;height:32px;background:var(--c-bg-alt);border-radius:50%;font-size:20px;color:var(--c-text);line-height:1;transition:all .3s}
.qr-modal-close:hover{background:var(--c-danger);color:#ffffff;transform:rotate(90deg)}

/* ========== 动画 ========== */
[data-anim]{opacity:0;transform:translateY(20px);transition:opacity .6s var(--easing),transform .6s var(--easing)}
[data-anim="fade-up"].is-in{opacity:1;transform:translateY(0)}
[data-anim="fade-right"]{transform:translateX(-20px)}
[data-anim="fade-right"].is-in{opacity:1;transform:translateX(0)}
[data-anim="fade-left"]{transform:translateX(20px)}
[data-anim="fade-left"].is-in{opacity:1;transform:translateX(0)}

/* ========== 响应式 ========== */
@media (max-width:1024px){
  .section{padding:80px 0}
  .section-title{font-size:32px}
  .section-head{margin-bottom:48px}
  .services-grid,.industries-grid{grid-template-columns:1fr;gap:20px}
  .service-card{padding:36px 28px}
  .strength-stats{grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:60px}
  .stat-num{font-size:48px}
  .process-grid{grid-template-columns:repeat(3,1fr);gap:16px}
  .timeline::before{left:24px}
  .timeline-item{width:100%;left:0!important;padding:20px 20px 20px 60px;text-align:left!important}
  .timeline-item::before{left:16px!important;right:auto!important}
  .timeline-body{text-align:left}
  .contact-grid{grid-template-columns:1fr;gap:40px}
  .footer-main{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
}
@media (max-width:768px){
  .nav-menu{position:fixed;top:64px;left:0;right:0;background:rgba(10,26,47,.98);backdrop-filter:blur(20px);flex-direction:column;align-items:stretch;padding:20px 24px;gap:0;transform:translateY(-110%);transition:transform .4s var(--easing);max-height:calc(100vh - 64px);overflow-y:auto;border-top:1px solid rgba(255,255,255,.08)}
  .nav-menu.open{transform:translateY(0)}
  .nav-menu li{width:100%;border-bottom:1px solid rgba(255,255,255,.06)}
  .nav-link{display:block;padding:14px 12px;width:100%;font-size:15px}
  .nav-link::after{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
  .hero{padding-top:0}
  .hero-content{padding-top:100px;padding-bottom:60px}
  .hero-title{font-size:36px}
  .hero-sub{font-size:16px}
  .hero-cta{flex-direction:column;align-items:flex-start}
  .hero-cta .btn{width:100%;justify-content:center}
  .hero-tags li{font-size:12px;padding:6px 12px}
  .hero-scroll{display:none}
  .section{padding:60px 0}
  .section-title{font-size:28px}
  .section-lead{font-size:15px}
  .container{padding:0 20px}
  .services-grid,.industries-grid{grid-template-columns:1fr}
  .service-card{padding:32px 24px}
  .service-num{font-size:36px;right:24px}
  .service-name{font-size:20px}
  .strength-stats{grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:48px}
  .stat-item{padding:28px 12px}
  .stat-num{font-size:36px}
  .stat-suffix{font-size:18px;margin-top:4px}
  .stat-label{font-size:12px}
  .process-grid{grid-template-columns:repeat(2,1fr)}
  .contact-item{padding:16px 18px;gap:14px}
  .contact-icon{width:40px;height:40px}
  .contact-icon svg{width:18px;height:18px}
  .contact-value{font-size:14px}
  .qr-frame{width:160px;height:160px}
  .footer{padding:60px 0 0}
  .footer-main{grid-template-columns:1fr;gap:32px}
  .footer-brand{max-width:100%}
  .floating{bottom:16px;right:16px}
  .floating-btn{padding:10px 14px;font-size:13px}
  .floating-btn span{display:none}
  .floating-btn{padding:12px}
  .faq-q{padding:18px 20px;gap:12px}
  .faq-num{width:36px;height:36px;font-size:12px}
  .faq-title{font-size:15px}
  .faq-a{padding:0 20px 20px 20px}
  .faq-a p{padding:16px;font-size:14px}
  .links-group-title{font-size:17px}
  .link-tag{font-size:13px;padding:8px 14px}
}
@media (max-width:480px){
  .hero-title{font-size:30px}
  .section-title{font-size:24px}
  .logo-sub{display:none}
  .process-grid{grid-template-columns:1fr}
  .strength-stats{grid-template-columns:1fr 1fr}
}

/* 减少动画偏好支持 */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
  [data-anim]{opacity:1;transform:none}
}

/* 打印样式 */
@media print{
  .nav,.floating,.hero-scroll,.hero-orb,.hero-grid,.hero-bg,.strength-bg{display:none}
  .hero{background:#ffffff;color:#000;min-height:auto;padding:20px 0}
  .hero-title,.hero-sub{color:#000}
  .section-strength{background:#ffffff;color:#000}
}

/* 城市分站导航 */
.section-friends{background:linear-gradient(180deg,#0a1a2f 0%,#0e2238 100%);color:#e5e7eb;position:relative;overflow:hidden}
.section-friends::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 0%,rgba(0,212,255,.08),transparent 50%),radial-gradient(circle at 80% 100%,rgba(212,165,116,.06),transparent 50%);pointer-events:none}
.section-friends .section-head{color:#fff;margin-bottom:48px;position:relative}
.section-friends .section-eyebrow{color:#00d4ff;letter-spacing:.18em;font-weight:600;font-size:13px;display:inline-block;margin-bottom:12px}
.section-friends .section-title{color:#fff;font-size:clamp(28px,4vw,42px);font-weight:800;line-height:1.25;margin-bottom:16px}
.section-friends .section-lead{color:#9ca3af;font-size:15px;line-height:1.8;max-width:760px;margin:0 auto}
.friends-grid{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px 16px;position:relative}
.friends-grid li{margin:0}
.friends-grid a{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:10px;color:#cbd5e1;font-size:14px;font-weight:500;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;overflow:hidden}
.friends-grid a::before{content:"";position:absolute;left:0;top:0;width:3px;height:100%;background:linear-gradient(180deg,#00d4ff,#d4a574);transform:scaleY(0);transform-origin:top;transition:transform .3s}
.friends-grid a:hover{background:rgba(0,212,255,.08);border-color:rgba(0,212,255,.4);color:#fff;transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,212,255,.12)}
.friends-grid a:hover::before{transform:scaleY(1)}
.friends-grid a::after{content:"›";color:#00d4ff;opacity:0;transform:translateX(-4px);transition:all .3s;margin-left:8px}
.friends-grid a:hover::after{opacity:1;transform:translateX(0)}
@media (max-width:768px){.friends-grid{grid-template-columns:repeat(2,1fr);gap:10px}.friends-grid a{padding:12px 14px;font-size:13px}}
@media (max-width:480px){.friends-grid{grid-template-columns:repeat(2,1fr)}}