/* ===== 汇燃官网 v2 - 真官网级 (2026-05-24 重做) =====
 * 设计哲学: 品牌大气 / 抽象色块 / 三档品质对比 / 4 场景分类
 * 主色 #DC2626 火焰红 + #F59E0B 琥珀 + #FEF5E7 米白
 * ============================================ */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:#1a1a1a;line-height:1.6;background:#FEFAF6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

:root{
  --red: #DC2626; --red-dark: #991B1B; --red-light: #FCA5A5;
  --amber: #F59E0B; --cream: #FEF5E7;
  --ink: #1F2937; --gray: #6B7280;
}

/* === 顶部导航 === */
.nav{position:sticky;top:0;background:rgba(254,250,246,.95);backdrop-filter:blur(12px);z-index:100;border-bottom:1px solid rgba(220,38,38,.08)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:72px;display:flex;align-items:center;gap:48px}
.nav-logo{display:flex;align-items:center;gap:12px;font-weight:900;font-size:22px;color:var(--red)}
.nav-logo-mark{width:40px;height:40px;background:linear-gradient(135deg,var(--red),var(--amber));border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:16px;color:#fff;font-weight:900}
.nav-logo-sub{font-size:11px;color:var(--gray);font-weight:400;letter-spacing:2px;margin-top:2px}
.nav-links{flex:1;display:flex;gap:32px;font-size:14px}
.nav-links a{position:relative;padding:6px 2px;color:var(--ink);transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--red)}
.nav-links a.active::after{content:'';position:absolute;bottom:-4px;left:0;right:0;height:3px;background:var(--red);border-radius:2px}
.nav-cta{background:linear-gradient(135deg,var(--red),#EF4444);color:#fff;padding:10px 22px;border-radius:24px;font-size:14px;font-weight:600;transition:all .2s}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 8px 20px rgba(220,38,38,.3)}
.nav-burger{display:none;width:32px;height:32px;cursor:pointer;flex-direction:column;justify-content:center;gap:5px;background:none;border:none}
.nav-burger span{height:2px;background:var(--ink);border-radius:1px}

/* === Hero === */
.hero{position:relative;padding:90px 24px 130px;overflow:hidden;background:linear-gradient(135deg,#FEF5E7 0%,#FED7AA 60%,#FCA5A5 100%)}
.hero::before{content:'';position:absolute;width:520px;height:520px;background:radial-gradient(circle,rgba(220,38,38,.18),transparent 60%);top:-100px;right:-150px;border-radius:50%;animation:float1 16s ease-in-out infinite}
.hero::after{content:'';position:absolute;width:420px;height:420px;background:radial-gradient(circle,rgba(245,158,11,.2),transparent 60%);bottom:-180px;left:-100px;border-radius:50%;animation:float2 20s ease-in-out infinite}
@keyframes float1{0%,100%{transform:translate(0,0)}50%{transform:translate(-40px,30px)}}
@keyframes float2{0%,100%{transform:translate(0,0)}50%{transform:translate(50px,-40px)}}

.hero-inner{max-width:1200px;margin:0 auto;position:relative;z-index:2}
.hero-tag{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.7);padding:8px 18px;border-radius:24px;font-size:13px;color:var(--red-dark);font-weight:600;margin-bottom:30px;border:1px solid rgba(220,38,38,.15)}
.hero-tag::before{content:'●';color:var(--red);animation:blink 2s infinite}
@keyframes blink{50%{opacity:.3}}
.hero h1{font-size:72px;font-weight:900;letter-spacing:-2px;line-height:1.05;color:var(--ink);margin-bottom:24px}
.hero h1 .accent{background:linear-gradient(135deg,var(--red),var(--amber));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero p{font-size:18px;color:var(--gray);max-width:580px;margin-bottom:40px}
.hero-cta{display:inline-flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:16px 32px;border-radius:30px;font-weight:600;font-size:15px;transition:all .25s;border:none;cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--red),#EF4444);color:#fff;box-shadow:0 10px 30px rgba(220,38,38,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 15px 35px rgba(220,38,38,.4)}
.btn-ghost{background:rgba(255,255,255,.6);color:var(--ink);border:1.5px solid rgba(31,41,55,.12)}
.btn-ghost:hover{background:#fff;border-color:var(--red)}

.hero-stats{display:flex;gap:40px;margin-top:50px;flex-wrap:wrap}
.hero-stat-num{font-size:42px;font-weight:900;color:var(--red);line-height:1}
.hero-stat-label{font-size:13px;color:var(--gray);margin-top:6px}

/* Hero 双栏布局 */
.hero-split{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center}
.hero-left h1{font-size:60px}
.hero-right{position:relative;min-height:480px}
.hero-visual{position:relative;border-radius:24px;overflow:hidden;background:#fff;box-shadow:0 30px 80px -20px rgba(220,38,38,.35);transform:rotate(-2deg);transition:transform .4s}
.hero-visual:hover{transform:rotate(0)}
.hero-visual::before{content:'';position:absolute;inset:0;background:linear-gradient(135deg,rgba(220,38,38,.06),transparent 60%);z-index:1;pointer-events:none}
.hero-visual img{width:100%;display:block;background:#fff}
.hero-visual-glow{position:absolute;width:120%;height:120%;top:-10%;left:-10%;background:radial-gradient(circle at 30% 50%,rgba(220,38,38,.25),transparent 60%);filter:blur(40px);z-index:-1;animation:glow 4s ease-in-out infinite}
@keyframes glow{0%,100%{opacity:.6}50%{opacity:1}}

/* Hero 浮卡 */
.hero-float{position:absolute;background:#fff;border-radius:16px;padding:14px 18px;display:flex;align-items:center;gap:12px;box-shadow:0 15px 40px -10px rgba(220,38,38,.2);border:1px solid rgba(220,38,38,.08);animation:floatCard 6s ease-in-out infinite;z-index:3;backdrop-filter:blur(10px)}
.hero-float-1{top:-10px;left:-30px;animation-delay:0s}
.hero-float-2{top:50%;right:-40px;animation-delay:-2s}
.hero-float-3{bottom:-20px;left:30px;animation-delay:-4s}
@keyframes floatCard{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
.hero-float-icon{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--red),#EF4444);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:18px;flex-shrink:0}
.hero-float-text{font-size:13px;line-height:1.3}
.hero-float-text b{display:block;color:var(--ink);font-weight:900;font-size:14px;margin-bottom:2px}
.hero-float-text small{color:var(--gray);font-size:11px}

/* === 分区通用 === */
section{padding:100px 24px;position:relative}
.container{max-width:1200px;margin:0 auto}
.sec-head{text-align:center;margin-bottom:60px}
.sec-eyebrow{display:inline-block;font-size:12px;letter-spacing:4px;font-weight:600;color:var(--red);text-transform:uppercase;margin-bottom:14px}
.sec-title{font-size:42px;font-weight:900;color:var(--ink);letter-spacing:-1px}
.sec-sub{font-size:16px;color:var(--gray);margin-top:14px;max-width:600px;margin-left:auto;margin-right:auto}

/* === 品质三档 === */
.tier-section{background:#fff}
.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.tier-card{background:linear-gradient(180deg,#fff,#FEF5E7);border:1px solid #FED7AA;border-radius:24px;padding:36px 30px;position:relative;transition:all .3s;overflow:hidden}
.tier-card:hover{transform:translateY(-6px);box-shadow:0 30px 60px -20px rgba(220,38,38,.25);border-color:var(--red-light)}
.tier-card::before{content:'';position:absolute;top:0;left:0;right:0;height:5px;background:var(--tier-color,var(--red))}
.tier-1{--tier-color:#9CA3AF}
.tier-2{--tier-color:var(--red);transform:scale(1.04);box-shadow:0 20px 60px -10px rgba(220,38,38,.25)}
.tier-2:hover{transform:scale(1.04) translateY(-6px)}
.tier-3{--tier-color:var(--amber)}
.tier-badge{position:absolute;top:24px;right:24px;background:var(--tier-color);color:#fff;font-size:11px;font-weight:600;padding:4px 10px;border-radius:12px;letter-spacing:1px}
.tier-icon{width:64px;height:64px;border-radius:50%;background:linear-gradient(135deg,var(--tier-color),rgba(255,255,255,.4));display:flex;align-items:center;justify-content:center;font-size:28px;margin-bottom:20px;color:#fff;box-shadow:0 10px 25px -10px var(--tier-color)}
.tier-name{font-size:26px;font-weight:900;color:var(--ink);margin-bottom:6px}
.tier-en{font-size:12px;color:var(--gray);letter-spacing:2px;margin-bottom:20px}
.tier-features{list-style:none;margin:20px 0}
.tier-features li{padding:10px 0;border-bottom:1px dashed #FED7AA;color:var(--ink);font-size:14px;display:flex;justify-content:space-between}
.tier-features li:last-child{border:none}
.tier-features li b{color:var(--tier-color);font-weight:700}
.tier-price{margin-top:24px;padding-top:20px;border-top:2px solid var(--tier-color);display:flex;justify-content:space-between;align-items:baseline}
.tier-price .from{font-size:12px;color:var(--gray)}
.tier-price .val{font-size:32px;font-weight:900;color:var(--tier-color)}
.tier-price .val small{font-size:13px;font-weight:400;color:var(--gray)}

/* === 应用场景 === */
.scene-section{background:linear-gradient(180deg,#FEF5E7,#FEFAF6)}
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene-card{background:#fff;border-radius:20px;padding:36px 24px;text-align:center;border:1px solid #FED7AA;transition:all .3s;position:relative;overflow:hidden}
.scene-card::after{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(circle,var(--scene-c1),transparent 60%);opacity:.08;transition:opacity .3s}
.scene-card:hover{transform:translateY(-4px);box-shadow:0 20px 40px rgba(220,38,38,.12)}
.scene-card:hover::after{opacity:.16}
.scene-card>*{position:relative;z-index:1}
.scene-1{--scene-c1:#FCA5A5}
.scene-2{--scene-c1:#FBBF24}
.scene-3{--scene-c1:#F59E0B}
.scene-4{--scene-c1:#DC2626}
.scene-emoji{font-size:56px;margin-bottom:14px;display:inline-block}
.scene-name{font-weight:900;color:var(--ink);font-size:18px;margin-bottom:6px}
.scene-spec{font-size:13px;color:var(--gray);margin-bottom:14px;min-height:42px}
.scene-tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:14px}
.scene-tag{font-size:11px;background:#FEF5E7;color:var(--red-dark);padding:3px 10px;border-radius:10px;font-weight:500}

/* === 数据指标 === */
.metrics-section{background:linear-gradient(135deg,var(--red-dark),var(--red));color:#fff;position:relative;overflow:hidden}
.metrics-section::before{content:'';position:absolute;width:600px;height:600px;background:radial-gradient(circle,rgba(255,255,255,.05),transparent);top:-200px;left:-200px;border-radius:50%}
.metrics-section .sec-title{color:#fff}
.metrics-section .sec-eyebrow{color:#FCA5A5}
.metrics-section .sec-sub{color:rgba(255,255,255,.7)}
.metrics-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;position:relative;z-index:2}
.metric{text-align:center;padding:24px}
.metric-num{font-size:64px;font-weight:900;line-height:1;background:linear-gradient(180deg,#fff,#FBBF24);-webkit-background-clip:text;-webkit-text-fill-color:transparent}
.metric-unit{font-size:18px;font-weight:600;color:#fff;margin-left:4px;vertical-align:super}
.metric-label{font-size:15px;color:rgba(255,255,255,.85);margin-top:12px;font-weight:500}
.metric-desc{font-size:12px;color:rgba(255,255,255,.55);margin-top:6px}

/* === 认证 / 安全 === */
.cert-section{background:#fff}
.cert-band{background:linear-gradient(135deg,#FEF5E7,#FED7AA);border-radius:24px;padding:48px;display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.cert-left h3{font-size:32px;font-weight:900;color:var(--ink);margin-bottom:14px}
.cert-left p{font-size:15px;color:var(--gray);margin-bottom:24px}
.cert-list{display:flex;flex-wrap:wrap;gap:10px}
.cert-list span{background:#fff;border:1.5px solid var(--red-light);color:var(--red-dark);padding:8px 16px;border-radius:18px;font-size:13px;font-weight:600}
.cert-right{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.cert-stat{background:#fff;border-radius:16px;padding:20px;text-align:center}
.cert-stat-icon{font-size:32px;margin-bottom:8px}
.cert-stat-num{font-size:24px;font-weight:900;color:var(--red)}
.cert-stat-label{font-size:12px;color:var(--gray);margin-top:4px}

/* === CTA === */
.cta-section{background:linear-gradient(135deg,#FCA5A5,#FBBF24);padding:80px 24px}
.cta-band{max-width:900px;margin:0 auto;background:#fff;border-radius:30px;padding:60px 48px;text-align:center;box-shadow:0 30px 80px rgba(220,38,38,.2)}
.cta-band h3{font-size:36px;font-weight:900;color:var(--ink);margin-bottom:14px}
.cta-band p{color:var(--gray);font-size:16px;margin-bottom:36px}
.cta-phones{display:flex;gap:30px;justify-content:center;flex-wrap:wrap;margin-bottom:30px}
.cta-phone{display:flex;align-items:center;gap:12px;background:linear-gradient(135deg,#FEF5E7,#fff);padding:16px 24px;border-radius:18px;border:1.5px solid #FED7AA}
.cta-phone-icon{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--red),var(--amber));color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px}
.cta-phone-text{text-align:left}
.cta-phone-text small{display:block;font-size:11px;color:var(--gray)}
.cta-phone-text b{font-size:18px;color:var(--red);font-family:-apple-system,monospace}

/* === Footer === */
footer{background:#1F0F0F;color:rgba(255,255,255,.7);padding:60px 24px 24px}
.foot-inner{max-width:1200px;margin:0 auto}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08)}
.foot-brand{display:flex;align-items:center;gap:14px;margin-bottom:16px}
.foot-brand-mark{width:48px;height:48px;background:linear-gradient(135deg,var(--red),var(--amber));border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:18px}
.foot-brand-text b{display:block;color:#fff;font-size:22px;font-weight:900}
.foot-brand-text small{font-size:11px;letter-spacing:2px;color:rgba(255,255,255,.4)}
.foot-desc{font-size:13px;color:rgba(255,255,255,.55);max-width:380px;margin-top:16px;line-height:1.7}
.foot-col h4{color:#fff;font-size:14px;font-weight:600;margin-bottom:18px}
.foot-col a{display:block;font-size:13px;color:rgba(255,255,255,.6);margin-bottom:10px;transition:color .2s}
.foot-col a:hover{color:var(--amber)}
.foot-bottom{padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:12px;color:rgba(255,255,255,.5)}
.foot-bottom a{color:rgba(255,255,255,.5)}
.foot-bottom a:hover{color:var(--amber)}

/* 业务热线浮动条 */
#hb-yxj-phone-bar{position:fixed;bottom:0;left:0;right:0;background:linear-gradient(90deg,var(--red),var(--amber));color:#fff;text-align:center;padding:12px 16px;font-size:13px;font-weight:600;z-index:99;box-shadow:0 -4px 16px rgba(220,38,38,.3)}
#hb-yxj-phone-bar a{color:#fff;text-decoration:underline;font-weight:700}

/* === 响应式 === */
@media(max-width:900px){
  .hero-split{grid-template-columns:1fr;gap:50px}
  .hero-left h1,.hero h1{font-size:42px}
  .hero p{font-size:16px}
  .hero-right{min-height:360px;max-width:480px;margin:0 auto}
  .hero-float-1{top:-10px;left:0}
  .hero-float-2{top:auto;bottom:30%;right:0}
  .hero-float-3{bottom:-10px;left:0}
  .sec-title{font-size:30px}
  .tier-grid{grid-template-columns:1fr;gap:20px}
  .tier-2{transform:none}
  .tier-2:hover{transform:translateY(-6px)}
  .scene-grid{grid-template-columns:repeat(2,1fr)}
  .metrics-grid{grid-template-columns:repeat(2,1fr)}
  .cert-band{grid-template-columns:1fr;padding:32px}
  .foot-grid{grid-template-columns:1fr 1fr;gap:32px}
  .nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:20px;border-top:1px solid #eee;box-shadow:0 10px 30px rgba(0,0,0,.1)}
  .nav-links.open{display:flex}
  .nav-burger{display:flex}
  .nav-cta{display:none}
}