/* ===== Reset & Base ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;color:#1a1a2e;line-height:1.7;overflow-x:hidden;background:#fff}
a{text-decoration:none;color:inherit;transition:color .2s}
ul{list-style:none}
img{max-width:100%;display:block}

/* ===== Utility ===== */
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.text-gradient{background:linear-gradient(135deg,#667eea 0%,#3a7bd5 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 32px;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:all .4s cubic-bezier(.16,1,.3,1);border:2px solid transparent}
.btn-primary{background:linear-gradient(135deg,#667eea,#3a7bd5);color:#fff;box-shadow:0 4px 20px rgba(102,126,234,.35)}
.btn-primary:hover{transform:translateY(-3px) scale(1.04);box-shadow:0 12px 36px rgba(102,126,234,.5)}
.btn-outline{border-color:#667eea;color:#667eea;background:transparent}
.btn-outline:hover{background:rgba(102,126,234,.08)}
.btn-lg{padding:16px 40px;font-size:17px;border-radius:14px}

/* ===== Navbar ===== */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(255,255,255,.85);backdrop-filter:blur(20px);border-bottom:1px solid rgba(0,0,0,.06);transition:box-shadow .3s}
.navbar.scrolled{box-shadow:0 2px 20px rgba(0,0,0,.08)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px}
.logo-img{width:36px;height:36px;border-radius:8px;object-fit:cover}
.logo-text{background:linear-gradient(135deg,#667eea,#3a7bd5);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.nav-links{display:flex;gap:32px}
.nav-links a{font-size:15px;font-weight:500;color:#555;position:relative;padding:4px 0}
.nav-links a::after{content:'';position:absolute;bottom:-2px;left:0;width:0;height:2px;background:linear-gradient(135deg,#667eea,#3a7bd5);border-radius:2px;transition:width .3s}
.nav-links a:hover{color:#667eea}
.nav-links a:hover::after{width:100%}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2.5px;background:#333;border-radius:2px;transition:all .3s}

/* ===== Hero ===== */
.hero{position:relative;padding:140px 0 100px;overflow:hidden;min-height:100vh;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;background:linear-gradient(135deg,#f0f4ff 0%,#e8eeff 30%,#f0f5ff 60%,#fff 100%);z-index:0}
.hero-bg::before{content:'';position:absolute;top:-200px;right:-200px;width:600px;height:600px;border-radius:50%;background:radial-gradient(circle,rgba(102,126,234,.12) 0%,transparent 70%)}
.hero-bg::after{content:'';position:absolute;bottom:-100px;left:-100px;width:400px;height:400px;border-radius:50%;background:radial-gradient(circle,rgba(58,123,213,.1) 0%,transparent 70%)}
.hero-inner{position:relative;z-index:1;display:flex;align-items:center;gap:80px}
.hero-content{flex:1}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 20px;background:rgba(102,126,234,.1);border:1px solid rgba(102,126,234,.2);border-radius:50px;font-size:14px;font-weight:600;color:#667eea;margin-bottom:28px}
.hero h1{font-size:50px;font-weight:900;line-height:1.3;letter-spacing:-1px;margin-bottom:20px}
.hero-highlight{background:linear-gradient(135deg,#667eea,#3a7bd5);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.hero-desc{font-size:18px;color:#666;line-height:1.8;margin-bottom:36px}
.hero-actions{display:flex;gap:16px;margin-bottom:48px;flex-wrap:wrap}
.hero-stats{display:flex;align-items:center;gap:32px}
.stat-item{display:flex;flex-direction:column;align-items:center}
.stat-num{font-size:32px;font-weight:900;background:linear-gradient(135deg,#667eea,#3a7bd5);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.stat-label{font-size:14px;color:#888;margin-top:4px}
.stat-divider{width:1px;height:40px;background:rgba(0,0,0,.1)}

/* Phone Mockup */
.hero-visual{position:relative;flex-shrink:0}
.phone-mockup{width:300px;height:620px;background:#1a1a1a;border-radius:44px;box-shadow:0 20px 60px rgba(0,0,0,.15),0 0 0 2px #333,inset 0 0 0 2px #1a1a1a;overflow:hidden;position:relative;padding:12px}
.phone-inner{width:100%;height:100%;border-radius:32px;overflow:hidden;position:relative;background:#fff}
.phone-screenshot{width:100%;height:100%;object-fit:cover;object-position:top}

/* Float Cards */
.float-card{position:absolute;background:#fff;padding:12px 20px;border-radius:14px;box-shadow:0 8px 30px rgba(0,0,0,.1);font-size:14px;font-weight:600;display:flex;align-items:center;gap:8px;white-space:nowrap;animation:float 4s cubic-bezier(.37,0,.63,1) infinite}
.float-card-1{top:60px;left:-70px;animation-delay:0s}
.float-card-2{bottom:100px;right:-50px;animation-delay:1.5s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}

.hero-wave{position:absolute;bottom:-1px;left:0;right:0;z-index:2}
.hero-wave svg{display:block;width:100%;height:80px}

/* ===== Section Common ===== */
.section{padding:100px 0}
.section-gray{background:#f8f9fc}
.section-header{text-align:center;margin-bottom:64px}
.section-tag{display:inline-block;padding:6px 18px;background:rgba(102,126,234,.1);color:#667eea;border-radius:50px;font-size:13px;font-weight:700;letter-spacing:1px;margin-bottom:16px}
.section-header h2{font-size:38px;font-weight:800;margin-bottom:12px}
.section-header p{font-size:17px;color:#777}

/* ===== Overview ===== */
.overview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.overview-card{background:#fff;border-radius:20px;padding:40px 32px;text-align:center;border:2px solid #f0f0f0;transition:transform .5s cubic-bezier(.16,1,.3,1),box-shadow .5s cubic-bezier(.16,1,.3,1),border-color .4s;cursor:pointer;position:relative}
.overview-card:hover{transform:translateY(-8px) scale(1.02);box-shadow:0 20px 50px rgba(0,0,0,.1)}
.overview-card.active{border-color:#667eea;box-shadow:0 8px 30px rgba(102,126,234,.15)}
.overview-card.active::after{content:'';position:absolute;bottom:-20px;left:50%;transform:translateX(-50%);width:0;height:0;border-left:10px solid transparent;border-right:10px solid transparent;border-top:10px solid #667eea}
.overview-icon{font-size:48px;margin-bottom:20px}
.overview-card h3{font-size:20px;font-weight:700;margin-bottom:10px}
.overview-card p{font-size:15px;color:#777;line-height:1.7}

/* Tab Panels */
.tab-panels{margin-top:48px;position:relative;min-height:200px}
.tab-panel{display:none;animation:tabFadeIn .6s cubic-bezier(.16,1,.3,1) both}
.tab-panel.active{display:block}
@keyframes tabFadeIn{from{opacity:0;transform:translateY(20px);filter:blur(4px)}to{opacity:1;transform:translateY(0);filter:none}}

/* ===== Feature Block ===== */
.feature-block{background:#fff;border-radius:20px;padding:36px;border:1px solid #f0f0f0;margin-bottom:40px}
.feature-block-header{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.fb-icon{font-size:28px}
.feature-block-header h3{font-size:20px;font-weight:700}
.service-tags{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}
.stag{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;background:#f8f9ff;border:1px solid rgba(102,126,234,.15);border-radius:12px;font-size:14px;font-weight:600;color:#444;transition:all .4s cubic-bezier(.16,1,.3,1)}
.stag:hover{border-color:#667eea;background:rgba(102,126,234,.08);color:#667eea;transform:translateY(-2px)}
.stag i{font-style:normal;font-size:18px}
.fb-desc{font-size:14px;color:#999}

/* ===== Func Grid ===== */
.func-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.func-card{background:#fff;border-radius:16px;padding:28px 24px;border:1px solid #f0f0f0;transition:transform .5s cubic-bezier(.16,1,.3,1),box-shadow .5s cubic-bezier(.16,1,.3,1)}
.func-card:hover{transform:translateY(-8px) scale(1.02);box-shadow:0 20px 50px rgba(0,0,0,.1)}
.func-icon{font-size:36px;margin-bottom:14px}
.func-card h4{font-size:17px;font-weight:700;margin-bottom:8px}
.func-card p{font-size:13px;color:#777;line-height:1.7}

/* ===== Admin Grid ===== */
.admin-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.admin-card{display:flex;gap:20px;align-items:flex-start;background:#fff;border-radius:16px;padding:28px;border:1px solid #f0f0f0;transition:transform .5s cubic-bezier(.16,1,.3,1),box-shadow .5s cubic-bezier(.16,1,.3,1)}
.admin-card:hover{transform:translateY(-6px);box-shadow:0 20px 50px rgba(0,0,0,.1)}
.admin-icon{font-size:36px;flex-shrink:0}
.admin-info h4{font-size:17px;font-weight:700;margin-bottom:6px}
.admin-info p{font-size:14px;color:#777;line-height:1.7}

/* ===== Safety Grid ===== */
.safety-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.safety-card{background:#fff;border-radius:20px;padding:40px 32px;border:1px solid #f0f0f0;transition:transform .5s cubic-bezier(.16,1,.3,1),box-shadow .5s cubic-bezier(.16,1,.3,1)}
.safety-card:hover{transform:translateY(-8px) scale(1.02);box-shadow:0 20px 50px rgba(0,0,0,.1)}
.safety-num{font-size:48px;font-weight:900;background:linear-gradient(135deg,rgba(102,126,234,.15),rgba(58,123,213,.1));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:16px;line-height:1}
.safety-card h3{font-size:20px;font-weight:700;margin-bottom:10px}
.safety-card p{font-size:15px;color:#777;line-height:1.7}

/* ===== Steps ===== */
.steps{max-width:640px;margin:0 auto;display:flex;flex-direction:column}
.step{display:flex;gap:28px;position:relative;padding-bottom:48px}
.step:last-child{padding-bottom:0}
.step-circle{width:56px;height:56px;border-radius:50%;background:linear-gradient(135deg,#667eea,#3a7bd5);color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:800;flex-shrink:0;position:relative;z-index:2}
.step-line{position:absolute;left:27px;top:56px;bottom:0;width:3px;background:linear-gradient(to bottom,#667eea,rgba(102,126,234,.15));border-radius:2px;z-index:1}
.step:last-child .step-line{display:none}
.step-content{padding-top:8px}
.step-content h3{font-size:20px;font-weight:700;margin-bottom:6px}
.step-content p{font-size:15px;color:#777;line-height:1.7}

/* ===== Benefits ===== */
.benefits-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.benefit-item{display:flex;gap:18px;align-items:flex-start;background:#fff;border-radius:16px;padding:28px;border:1px solid #f0f0f0;transition:transform .5s cubic-bezier(.16,1,.3,1),box-shadow .5s cubic-bezier(.16,1,.3,1)}
.benefit-item:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(0,0,0,.08)}
.benefit-icon{font-size:36px;flex-shrink:0}
.benefit-item strong{font-size:16px;display:block;margin-bottom:4px}
.benefit-item p{font-size:14px;color:#777;line-height:1.6;margin:0}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.contact-card{background:#fff;border-radius:20px;padding:40px 32px;border:1px solid #f0f0f0;text-align:center;transition:transform .5s cubic-bezier(.16,1,.3,1),box-shadow .5s cubic-bezier(.16,1,.3,1)}
.contact-card:hover{transform:translateY(-8px);box-shadow:0 20px 50px rgba(0,0,0,.1)}
.qr-placeholder{display:flex;flex-direction:column;align-items:center;gap:12px;padding:24px;background:#fff;border-radius:16px;border:2px dashed rgba(102,126,234,.25)}
.qr-placeholder span{font-size:56px}
.qr-img{width:180px;height:180px;object-fit:contain;border-radius:8px}
.qr-placeholder p{font-size:17px;font-weight:700;color:#333}
.qr-placeholder small{font-size:13px;color:#999}
.contact-info-list{display:flex;flex-direction:column;gap:24px;text-align:left}
.contact-info-item{display:flex;align-items:flex-start;gap:16px}
.ci-icon{font-size:28px;flex-shrink:0;margin-top:2px}
.contact-info-item strong{font-size:15px;display:block;margin-bottom:2px}
.contact-info-item p{font-size:14px;color:#777;margin:0}

/* ===== FAQ ===== */
.faq-list{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{background:#fff;border-radius:14px;border:1px solid #f0f0f0;overflow:hidden;transition:box-shadow .5s cubic-bezier(.16,1,.3,1)}
.faq-item:hover{box-shadow:0 4px 16px rgba(0,0,0,.05)}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;cursor:pointer;font-size:16px;font-weight:600;user-select:none}
.faq-arrow{font-size:14px;color:#999;transition:transform .3s}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .5s cubic-bezier(.16,1,.3,1),padding .5s cubic-bezier(.16,1,.3,1);padding:0 24px}
.faq-item.open .faq-a{max-height:200px;padding:0 24px 20px}
.faq-a p{font-size:15px;color:#777;line-height:1.8;margin:0}

/* ===== Footer ===== */
.footer{background:#1a1a2e;color:rgba(255,255,255,.7);padding:64px 0 0}
.footer-inner{display:flex;justify-content:space-between;gap:48px;padding-bottom:48px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand{max-width:300px}
.footer-brand .logo-img{width:28px;height:28px;border-radius:6px}
.footer-brand .logo-text{font-size:20px;background:linear-gradient(135deg,#667eea,#7eb3ff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8}
.footer-links{display:flex;gap:64px}
.footer-col{display:flex;flex-direction:column;gap:12px}
.footer-col h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:4px}
.footer-col a{font-size:14px;transition:color .2s}
.footer-col a:hover{color:#667eea}
.footer-bottom{padding:24px 0;text-align:center;font-size:13px;color:rgba(255,255,255,.4)}

/* ===== Apple-style Scroll Animations ===== */
.anim{opacity:0;will-change:opacity,transform,filter;transition-property:opacity,transform,filter;transition-timing-function:cubic-bezier(.16,1,.3,1);transition-duration:.9s}
.anim.visible{opacity:1;transform:none;filter:none}

/* 从下方升起 */
.anim-up{transform:translateY(60px)}
/* 从下方升起 + 微模糊 */
.anim-up-blur{transform:translateY(50px);filter:blur(6px)}
/* 微缩放 */
.anim-scale{transform:scale(.92);filter:blur(4px)}
/* 从左侧滑入 */
.anim-left{transform:translateX(-50px)}
/* 从右侧滑入 */
.anim-right{transform:translateX(50px)}

/* Hero 逐行揭示 */
.hero-content .anim-line{opacity:0;transform:translateY(40px);filter:blur(4px);transition:opacity .8s cubic-bezier(.16,1,.3,1),transform .8s cubic-bezier(.16,1,.3,1),filter .8s cubic-bezier(.16,1,.3,1)}
.hero-content .anim-line.visible{opacity:1;transform:translateY(0);filter:none}

/* 交错延迟：由 JS 设置 --delay 变量 */
.anim[style*="--delay"]{transition-delay:var(--delay)}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .hero-inner{flex-direction:column;text-align:center;gap:48px}
  .hero h1{font-size:38px}
  .hero-actions{justify-content:center}
  .hero-stats{justify-content:center}
  .hero-visual{display:none}
  .overview-grid,.safety-grid,.contact-grid{grid-template-columns:repeat(2,1fr)}
  .func-grid{grid-template-columns:repeat(2,1fr)}
  .admin-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  .nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 24px;gap:0;box-shadow:0 8px 30px rgba(0,0,0,.08);border-bottom:1px solid #f0f0f0}
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 0;border-bottom:1px solid #f5f5f5}
  .nav-links a:last-child{border-bottom:none}
  .nav-toggle{display:flex}
  .nav-toggle.open span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
  .nav-toggle.open span:nth-child(2){opacity:0}
  .nav-toggle.open span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
  .hero{padding:120px 0 80px;min-height:auto}
  .hero h1{font-size:30px}
  .hero-desc{font-size:16px}
  .hero-stats{flex-wrap:wrap;gap:20px}
  .stat-divider{display:none}
  .section{padding:64px 0}
  .section-header h2{font-size:28px}
  .overview-grid,.safety-grid,.contact-grid{grid-template-columns:1fr}
  .func-grid{grid-template-columns:1fr}
  .benefits-grid{grid-template-columns:1fr}
  .footer-inner{flex-direction:column}
  .footer-links{flex-wrap:wrap;gap:32px}
  .service-tags{gap:8px}
  .stag{padding:8px 14px;font-size:13px}
}