*{margin:0;padding:0;box-sizing:border-box}
:root{
  --green:#00C250;
  --green-dark:#00A844;
  --text:#222;
  --text2:#666;
  --text3:#999;
  --bg:#F5F7FA;
  --white:#fff;
  --border:#EBEDF0;
  --shadow:0 2px 12px rgba(0,0,0,0.06);
}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",Arial,sans-serif;color:var(--text);font-size:14px;line-height:1.6;background:var(--white);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}

/* ====== TOP BAR ====== */
.top-bar{background:#F5F7FA;padding:8px 0;font-size:12px;color:var(--text3);text-align:center;border-bottom:1px solid var(--border)}
.top-bar span{color:var(--green);font-weight:600}

/* ====== NAV ====== */
.nav{display:flex;align-items:center;justify-content:space-between;padding:0 24px;height:60px;max-width:1200px;margin:0 auto}
.nav-logo{font-size:22px;font-weight:700;color:var(--text)}
.nav-logo span{color:var(--green)}
.nav-tel{font-size:15px}
.nav-tel a{color:var(--text);text-decoration:none;font-weight:600}

/* ====== HERO ====== */
.hero{max-width:1200px;margin:0 auto;padding:60px 24px 50px;text-align:center}
.hero h1{font-size:36px;font-weight:700;color:var(--text);line-height:1.3;margin-bottom:12px}
.hero h1 span{color:var(--green)}
.hero-sub{font-size:16px;color:var(--text2);line-height:1.6;margin-bottom:36px}

/* Hero 搜索框 */
.hero-search{max-width:640px;margin:0 auto 20px;display:flex;gap:12px;align-items:center}
.hero-input{flex:1;height:64px;padding:0 24px;border:2.5px solid var(--border);border-radius:14px;font-size:20px;outline:none;font-family:monospace;letter-spacing:3px;transition:border 0.2s;min-height:64px;max-height:64px}
.hero-input:focus{border-color:var(--green)}
.hero-input::placeholder{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue",Arial,sans-serif;letter-spacing:0;font-size:17px}
.hero-btn{height:64px;padding:0 52px;background:var(--green);color:#fff;border:none;border-radius:14px;font-size:20px;font-weight:700;cursor:pointer;white-space:nowrap;transition:background 0.15s}
.hero-btn:hover{background:var(--green-dark)}
.hero-hint{font-size:13px;color:var(--text3);margin-top:8px}

/* ====== 三大卖点条 ====== */
.feature-bar{max-width:1200px;margin:0 auto;padding:0 24px 40px;display:grid;grid-template-columns:repeat(3,1fr);gap:0;text-align:center;border-bottom:1px solid var(--border)}
.feature-item{padding:20px 16px}
.feature-icon{font-size:32px;margin-bottom:8px}
.feature-title{font-size:16px;font-weight:700;color:var(--text)}
.feature-desc{font-size:13px;color:var(--text3);margin-top:4px}

/* ====== 通用区块 ====== */
.section{max-width:1200px;margin:0 auto;padding:48px 24px}
.section-title{font-size:22px;font-weight:700;color:var(--text);margin-bottom:24px;text-align:center}

/* 步骤 */
.steps{display:flex;justify-content:center;gap:60px;margin-top:32px}
.step{text-align:center}
.step-circle{width:60px;height:60px;border-radius:50%;background:var(--bg);display:flex;align-items:center;justify-content:center;margin:0 auto 10px;font-size:24px}
.step-arrow{position:absolute;font-size:20px;color:var(--text3);margin-top:18px}
.step-label{font-size:14px;font-weight:600;color:var(--text)}
.step-desc{font-size:12px;color:var(--text3);margin-top:2px}

.steps-wrap{display:flex;justify-content:center;align-items:flex-start;gap:40px;flex-wrap:wrap}
.step-item{text-align:center;width:140px;position:relative}
.step-item+.step-item::before{content:'→';position:absolute;left:-28px;top:18px;font-size:20px;color:var(--text3)}
.step-icon{width:56px;height:56px;border-radius:50%;background:var(--bg);display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:26px}
.step-name{font-size:15px;font-weight:700;color:var(--text)}
.step-tip{font-size:12px;color:var(--text3);margin-top:4px}

/* ====== 表单区 ====== */
.section-gray{background:var(--bg);padding:48px 24px}
.form-wrap{max-width:680px;margin:0 auto;background:var(--white);border-radius:12px;padding:36px 32px;box-shadow:var(--shadow)}
.form-row{margin-bottom:18px}
.form-label{font-size:14px;font-weight:600;color:var(--text);margin-bottom:6px;display:block}
.form-label .req{color:var(--green)}
.form-input{width:100%;height:44px;padding:0 14px;border:1.5px solid var(--border);border-radius:6px;font-size:15px;color:var(--text);outline:none;transition:border 0.2s;font-family:inherit;background:var(--white)}
.form-input:focus{border-color:var(--green)}
textarea.form-input{height:auto;padding:10px 14px;resize:none}
.form-hint{font-size:12px;color:var(--text3);margin-top:4px}
select.form-input{appearance:none;-webkit-appearance:none;background:var(--white) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23999' d='M6 8L1 3h10z'/%3E%3C/svg%3E") no-repeat right 12px center;padding-right:32px}
.vin-input{font-family:"SF Mono",Menlo,monospace;letter-spacing:2px;text-transform:uppercase}

/* 重量输入框 - 带 kg 后缀 */
.weight-wrap{position:relative;display:flex;align-items:center}
.weight-wrap .weight-input{padding-right:40px}
.weight-unit{position:absolute;right:14px;color:var(--text3);font-size:14px;font-weight:500;pointer-events:none}
.vin-meta{display:flex;justify-content:space-between;font-size:12px;color:var(--text3);margin-top:5px}

/* 照片 */
.photo-upload{border:2px dashed var(--border);border-radius:8px;padding:24px;text-align:center;cursor:pointer;background:var(--bg);transition:border 0.2s}
.photo-upload:hover{border-color:var(--green)}
.photo-upload-icon{font-size:32px;color:#CCC;margin-bottom:6px}
.photo-upload-text{font-size:14px;color:var(--text2)}
.photo-preview{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.photo-thumb{width:76px;height:76px;object-fit:cover;border-radius:6px;border:1px solid var(--border)}

/* 隐私 */
.privacy-tip{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text3);margin-bottom:18px}
.privacy-tip .icon{font-size:16px}

/* 提交 */
.btn-submit{width:100%;height:50px;background:var(--green);color:#fff;border:none;border-radius:6px;font-size:17px;font-weight:700;cursor:pointer;letter-spacing:1px;transition:background 0.15s;font-family:inherit}
.btn-submit:hover{background:var(--green-dark)}
.btn-submit:active{transform:scale(0.99)}
.btn-submit:disabled{background:#CCC;cursor:not-allowed;transform:none}
.btn-sub-text{font-size:12px;font-weight:400;opacity:0.85;margin-top:2px}

/* ====== FAQ ====== */
.faq-wrap{max-width:780px;margin:0 auto}
.faq-item{border-bottom:1px solid var(--border)}
.faq-item:last-child{border-bottom:none}
.faq-q{cursor:pointer;padding:18px 0;font-size:16px;font-weight:600;color:var(--text);display:flex;justify-content:space-between;align-items:center;user-select:none}
.faq-q::after{content:'+';font-size:20px;color:#CCC;font-weight:300}
.faq-q.open::after{content:'−';color:var(--green)}
.faq-a{display:none;padding:0 0 18px;font-size:14px;color:var(--text2);line-height:1.8}
.faq-a.show{display:block}

/* ====== FOOTER ====== */
.footer{background:#1A1A1A;padding:32px 24px;text-align:center;color:#999;font-size:13px;line-height:2.2}
.footer-tel{font-size:20px;font-weight:700}
.footer-tel a{color:var(--green);text-decoration:none}
.copy-btn{background:none;border:1px solid var(--green);color:var(--green);font-size:14px;font-weight:600;cursor:pointer;padding:4px 14px;border-radius:6px;font-family:inherit;margin-left:12px;vertical-align:middle;transition:all .2s}
.copy-btn:hover{background:var(--green);color:#fff}

/* ====== MODAL ====== */
.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.6);z-index:200;display:flex;align-items:flex-end;justify-content:center;opacity:0;pointer-events:none;transition:opacity 0.3s}
.modal-overlay.show{opacity:1;pointer-events:all}
.modal{background:#fff;border-radius:16px 16px 0 0;width:100%;max-width:480px;transform:translateY(100%);transition:transform 0.3s cubic-bezier(0.32,0.72,0,1);max-height:90vh;overflow-y:auto}
.modal-overlay.show .modal{transform:translateY(0)}
.modal-header{padding:20px 20px 16px;text-align:center;border-bottom:1px solid var(--border);position:sticky;top:0;background:#fff;z-index:10;border-radius:16px 16px 0 0}
.modal-title{font-size:18px;font-weight:700;color:var(--text)}
.modal-vin{font-size:13px;color:var(--text3);margin-top:4px;font-family:monospace;letter-spacing:1px}
.modal-close{position:absolute;right:16px;top:16px;background:none;border:none;font-size:20px;color:var(--text3);cursor:pointer;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%}
.modal-close:hover{background:var(--bg)}

/* 价格 */
.modal-price-box{text-align:center;padding:28px 20px;background:linear-gradient(180deg,#F0FFF5,#fff)}
.modal-price-label{font-size:13px;color:var(--text3);margin-bottom:6px}
.modal-price-value{font-size:34px;font-weight:800;color:var(--green)}
.modal-price-basis{font-size:13px;color:var(--text2);margin-top:6px}

/* 车辆信息 */
.modal-car-section{padding:20px}
.modal-car-title{font-size:15px;font-weight:700;color:var(--text);margin-bottom:12px}
.car-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--border);border:1px solid var(--border);border-radius:8px;overflow:hidden}
.car-cell{background:#fff;padding:10px 14px}
.car-cell-key{font-size:12px;color:var(--text3);margin-bottom:2px}
.car-cell-val{font-size:14px;font-weight:600;color:var(--text)}
.car-cell-val.hl{color:var(--green)}

/* 联系区 */
.modal-contact{padding:20px;border-top:1px solid var(--border)}
.modal-contact-title{font-size:15px;font-weight:700;color:var(--text);margin-bottom:14px;text-align:center}
.modal-qr{text-align:center;background:#FAFFFC;border:1px solid #D4F0DC;border-radius:10px;padding:18px;margin-bottom:12px}
.modal-qr img{width:110px;height:110px;border-radius:8px}
.modal-wechat-id{font-size:18px;font-weight:800;color:var(--green-dark);margin-top:6px}
.modal-wechat-tip{font-size:12px;color:var(--text3);margin-top:2px}
.btn-green{width:100%;height:46px;background:var(--green);color:#fff;border:none;border-radius:6px;font-size:15px;font-weight:700;cursor:pointer;margin-bottom:10px;font-family:inherit}
.btn-outline{width:100%;height:46px;background:#fff;color:var(--green);border:1.5px solid var(--green);border-radius:6px;font-size:15px;font-weight:700;cursor:pointer;font-family:inherit;text-decoration:none;display:flex;align-items:center;justify-content:center}

/* Loading / Error */
.loading-box{text-align:center;padding:50px 20px}
.spinner{width:32px;height:32px;border:3px solid #EEE;border-top-color:var(--green);border-radius:50%;animation:spin 0.7s linear infinite;margin:0 auto 12px}
@keyframes spin{to{transform:rotate(360deg)}}
.error-box{margin:16px 20px;padding:14px 16px;background:#FFF5F5;border:1px solid #FECACA;border-radius:8px;font-size:14px;color:#E53E3E;text-align:center}

/* Toast */
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%) translateY(-100px);background:rgba(0,0,0,0.8);color:#fff;padding:12px 24px;border-radius:6px;font-size:14px;transition:transform 0.3s;z-index:300;pointer-events:none}
.toast.show{transform:translateX(-50%) translateY(0)}

@media(max-width:768px){
  .top-bar{font-size:11px;padding:6px 12px;line-height:1.5}

  .nav{padding:0 16px;height:52px}
  .nav-logo{font-size:18px}
  .nav-tel{font-size:13px}

  .hero{padding:36px 16px 32px}
  .hero h1{font-size:24px;line-height:1.4}
  .hero-sub{font-size:14px;margin-bottom:24px}
  .hero-search{flex-direction:column;gap:10px}
  .hero-input{width:100%;height:64px;font-size:18px;padding:0 20px;border-radius:14px;border-width:2.5px}
  .hero-btn{width:100%;height:64px;font-size:18px;border-radius:14px;margin-top:4px}
  .hero-hint{font-size:12px;text-align:left}

  .feature-bar{padding:0 12px 24px;gap:0}
  .feature-item{padding:14px 6px}
  .feature-icon{font-size:26px}
  .feature-title{font-size:14px}
  .feature-desc{font-size:12px}

  .section{padding:32px 16px}
  .section-title{font-size:18px;margin-bottom:18px}

  .steps-wrap{gap:12px}
  .step-item{width:68px}
  .step-item+.step-item::before{left:-10px;top:14px;font-size:14px}
  .step-icon{width:40px;height:40px;font-size:20px;margin-bottom:8px}
  .step-name{font-size:13px}
  .step-tip{font-size:11px}

  .section-gray{padding:32px 0}
  .form-wrap{padding:20px 14px;border-radius:0;box-shadow:none;margin:0}
  .form-label{font-size:13px}
  .form-input{height:44px;font-size:16px}
  .vin-input{font-size:14px;letter-spacing:1px}
  .btn-submit{height:48px;font-size:16px}

  .faq-wrap{padding:0}
  .faq-q{font-size:14px;padding:14px 0}
  .faq-a{font-size:13px}

  .footer{padding:24px 16px;font-size:12px}
  .footer-tel{font-size:18px}

  .modal{border-radius:12px 12px 0 0}
  .modal-header{padding:16px 16px 12px}
  .modal-title{font-size:16px}
  .modal-price-value{font-size:28px}
  .modal-qr img{width:90px;height:90px}
  .modal-wechat-id{font-size:16px}
  .car-cell-val{font-size:13px}

  .photo-thumb{width:64px;height:64px}
  .photo-upload{padding:18px}

  .toast{top:10px;font-size:13px;padding:10px 20px}
}

@media(max-width:400px){
  .hero h1{font-size:21px}
  .hero-sub{font-size:13px}
  .steps-wrap{gap:6px}
  .step-item{width:60px}
  .step-item+.step-item::before{left:-7px;font-size:12px}
  .step-icon{width:36px;height:36px;font-size:18px}
  .step-name{font-size:11px}
  .feature-item{padding:10px 4px}
  .feature-icon{font-size:22px}
  .feature-title{font-size:12px}
  .feature-desc{font-size:11px}
}