/* ==========================================================================
   量美 (LUMEI) 汽车膜官方展示网站核心设计系统
   设计依据: american_window_film_design_analysis.md
   风格定位: 现代工业精工 + 汽车超跑科技美学 (Obsidian Dark / Crimson Red / Glacier Blue)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Barlow+Condensed:ital,wght@0,400;0,600;0,700;0,800;1,700&family=Inter:wght@300;400;500;600;700&family=Noto+Sans+SC:wght@400;500;700;900&display=swap');

:root {
  /* 品牌色彩 Token */
  --color-primary: #E53935;           /* 极速赛车红 / 核心行动色 */
  --color-primary-hover: #C62828;     /* 按钮悬浮深红 */
  --color-primary-glow: rgba(229, 57, 53, 0.35);
  
  --color-navy: #0F2B48;              /* 海峡工程深蓝 */
  --color-navy-dark: #071726;         /* 极深蓝黑 */
  --color-obsidian: #0D1117;          /* 曜石暗夜黑 (超跑科技主底色) */
  --color-surface-dark: #161B22;      /* 暗色卡片表面底色 */
  --color-surface-card: #1F242C;      /* 提升卡片底色 */
  --color-border-dark: rgba(255, 255, 255, 0.08);

  /* 亮色与交替节奏色 */
  --color-pure-white: #FFFFFF;
  --color-warm-light: #F4F3F0;        /* 柔和暖米灰 (继承AWF风格) */
  --color-slate-light: #F8FAFC;       /* 浅灰白背景 */
  --color-border-light: #E2E8F0;      /* 浅色分割线 */

  /* 科技与质保点缀色 */
  --color-glacier-blue: #00D2FF;      /* 冰川蓝 (隔热/纳米科技) */
  --color-gold: #D4AF37;              /* 钛金/香槟金 (全国电子质保) */
  --color-emerald: #10B981;           /* 正品验证通过绿 */

  /* 字体与字阶 */
  --font-heading: 'Barlow Condensed', 'Noto Sans SC', sans-serif;
  --font-body: 'Inter', 'Noto Sans SC', sans-serif;

  /* 阴影与微质感 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 14px 35px rgba(0, 0, 0, 0.16);
  --shadow-dark-card: 0 10px 30px rgba(0, 0, 0, 0.4);
  --radius-sm: 4px;                   /* 标志性 4px 工业微圆角 */
  --radius-md: 8px;
  --radius-lg: 16px;
  
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* 全局重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-obsidian);
  color: #E2E8F0;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   按钮组件规范 (遵从 AWF 工业 4px 微圆角与全大写规范)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 4px 15px var(--color-primary-glow);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  box-shadow: 0 8px 25px rgba(229, 57, 53, 0.5);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: #FFFFFF;
  transform: translateY(-2px);
}

.btn-gold {
  background: linear-gradient(135deg, #D4AF37 0%, #AA820A 100%);
  color: #0D1117;
  font-weight: 800;
  box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
}

.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(212, 175, 55, 0.5);
}

/* ==========================================================================
   顶栏导航 (Navbar)
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: var(--transition);
  padding: 20px 0;
  background: linear-gradient(to bottom, rgba(13, 17, 23, 0.95), rgba(13, 17, 23, 0));
}

.site-header.scrolled {
  padding: 14px 0;
  background-color: rgba(13, 17, 23, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-dark);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo-mark {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-primary) 0%, #900C1B 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFF;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.5rem;
  letter-spacing: -0.5px;
  box-shadow: 0 4px 12px var(--color-primary-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: #FFFFFF;
  line-height: 1;
  white-space: nowrap;
}

.brand-tagline {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: #94A3B8;
  margin-top: 3px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 28px;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #CBD5E1;
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: #FFFFFF;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: var(--transition);
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.mobile-menu-footer {
  display: none;
}

.nav-action-group {
  display: flex;
  align-items: center;
  gap: 16px;
}

.warranty-nav-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(212, 175, 55, 0.12);
  border: 1px solid rgba(212, 175, 55, 0.4);
  color: #FCD34D;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
}

.warranty-nav-btn:hover {
  background: rgba(212, 175, 55, 0.2);
  border-color: #FCD34D;
  color: #FFF;
}


.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  color: #FFF;
  font-size: 1.6rem;
  cursor: pointer;
}

/* ==========================================================================
   Hero 首屏视觉 (全景精工贴膜背景 + 动效遮罩)
   ========================================================================== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 100px;
  background-color: var(--color-obsidian);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.02);
  animation: subtleZoom 20s infinite alternate ease-in-out;
}

@keyframes subtleZoom {
  from { transform: scale(1.0); }
  to { transform: scale(1.06); }
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    rgba(13, 17, 23, 0.95) 0%,
    rgba(13, 17, 23, 0.85) 45%,
    rgba(13, 17, 23, 0.4) 100%
  );
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: 800px;
  padding: 40px 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(229, 57, 53, 0.15);
  border: 1px solid rgba(229, 57, 53, 0.4);
  color: #FF8A80;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 20px;
}

.hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
  box-shadow: 0 0 10px var(--color-primary);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: 4rem;
  line-height: 1.08;
  font-weight: 800;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}

.hero-title span.highlight-red {
  color: var(--color-primary);
  position: relative;
  display: inline-block;
}

.hero-title span.highlight-blue {
  color: var(--color-glacier-blue);
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.7;
  color: #CBD5E1;
  max-width: 660px;
  margin-bottom: 36px;
}

.hero-cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
}

/* ==========================================================================
   信任指标背书栏 (Trust Bar)
   ========================================================================== */
.trust-bar-section {
  position: relative;
  z-index: 10;
  background: #FFFFFF;
  color: var(--color-navy);
  padding: 38px 0;
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 10px;
  border-right: 1px solid #E2E8F0;
}

.trust-item:last-child {
  border-right: none;
}

.trust-icon-box {
  width: 52px;
  height: 52px;
  background-color: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.6rem;
  flex-shrink: 0;
}

.trust-info-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-navy);
  line-height: 1.1;
  letter-spacing: 0.5px;
}

.trust-info-label {
  font-size: 0.85rem;
  color: #64748B;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 2px;
}

/* ==========================================================================
   模块通用标题 (Section Header)
   ========================================================================== */
.section {
  padding: 90px 0;
}

.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 60px;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 800;
  line-height: 1.15;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
}

.section-desc {
  font-size: 1.1rem;
  color: #94A3B8;
  line-height: 1.7;
}

/* ==========================================================================
   标志性“悬浮圆形徽章”产品分类卡片 (Signature Floating Badge Cards)
   严格遵从 AWF 50% 探出圆形红色徽章规范
   ========================================================================== */
.products-section {
  background-color: var(--color-surface-dark);
  border-bottom: 1px solid var(--color-border-dark);
}

.product-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.product-card {
  background-color: #FFFFFF;
  border-radius: var(--radius-sm);
  overflow: visible;
  position: relative;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
}

.product-card-thumb {
  position: relative;
  width: 100%;
  height: 250px;
  overflow: hidden;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.product-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.product-card:hover .product-card-thumb img {
  transform: scale(1.08);
}

.product-badge-flag {
  position: absolute;
  top: 14px;
  right: 14px;
  background-color: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(6px);
  color: #FFFFFF;
  padding: 4px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

/* 核心标志：50% 探出的圆形徽章 */
.floating-circle-badge {
  position: absolute;
  top: 250px;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 58px;
  height: 58px;
  background-color: var(--color-primary);
  border: 4px solid #FFFFFF;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-size: 1.5rem;
  box-shadow: 0 6px 16px rgba(229, 57, 53, 0.4);
  z-index: 5;
  transition: var(--transition);
}

.product-card:hover .floating-circle-badge {
  transform: translate(-50%, -50%) scale(1.1);
  background-color: var(--color-primary-hover);
  box-shadow: 0 8px 22px rgba(229, 57, 53, 0.6);
}

.product-card-body {
  padding: 44px 28px 28px;
  color: var(--color-navy);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.product-card-category {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.product-card-title {
  font-family: var(--font-heading);
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-navy);
  margin-bottom: 14px;
}

.product-card-desc {
  font-size: 0.95rem;
  color: #475569;
  line-height: 1.65;
  margin-bottom: 20px;
  flex-grow: 1;
}

.product-card-features {
  list-style: none;
  margin-bottom: 24px;
  padding-top: 14px;
  border-top: 1px solid #F1F5F9;
}

.product-card-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: #334155;
  margin-bottom: 8px;
  font-weight: 500;
}

.product-card-features li i {
  color: var(--color-primary);
  font-size: 0.85rem;
}

.product-card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--color-navy);
  border-top: 1px solid #E2E8F0;
  padding-top: 16px;
}

.product-card-link:hover {
  color: var(--color-primary);
  gap: 12px;
}

/* ==========================================================================
   交互式车窗透光率模拟器 (VLT Visualizer)
   ========================================================================== */
.simulator-section {
  background: radial-gradient(circle at 50% 30%, #161F2C 0%, var(--color-obsidian) 100%);
  border-bottom: 1px solid var(--color-border-dark);
}

.simulator-container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: center;
  background-color: var(--color-surface-dark);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-dark-card);
}

.simulator-preview-box {
  position: relative;
  background: #000000;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sim-car-base-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.95;
}

/* 动态透光率遮罩层 */
.sim-tint-glass-layer {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  transition: background-color 0.4s ease, backdrop-filter 0.4s ease;
}

.sim-hud-status {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  display: flex;
  gap: 24px;
}

.sim-hud-item {
  display: flex;
  flex-direction: column;
}

.sim-hud-label {
  font-size: 0.75rem;
  color: #94A3B8;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.sim-hud-val {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: #FFFFFF;
  line-height: 1.1;
}

.sim-hud-val.blue {
  color: var(--color-glacier-blue);
}

.sim-controls-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sim-tab-group {
  display: flex;
  background: rgba(255, 255, 255, 0.05);
  padding: 4px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.sim-tab-btn {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: none;
  color: #94A3B8;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
}

.sim-tab-btn.active {
  background: var(--color-primary);
  color: #FFFFFF;
  box-shadow: 0 2px 10px var(--color-primary-glow);
}

.sim-slider-wrapper {
  background: rgba(255, 255, 255, 0.03);
  padding: 24px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.sim-slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.sim-slider-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  text-transform: uppercase;
}

.sim-vlt-badge {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
}

.vlt-slider {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, #1A202C 0%, #E2E8F0 100%);
  outline: none;
  -webkit-appearance: none;
  cursor: pointer;
  margin-bottom: 12px;
}

.vlt-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #FFFFFF;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.vlt-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.vlt-ticks {
  display: flex;
  justify-content: space-between;
  color: #64748B;
  font-size: 0.8rem;
  font-weight: 600;
}

.sim-specs-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.spec-chip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 14px 18px;
  border-radius: var(--radius-sm);
}

.spec-chip-title {
  font-size: 0.8rem;
  color: #94A3B8;
  margin-bottom: 4px;
}

.spec-chip-value {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: #FFFFFF;
}

/* ==========================================================================
   全国认证施工门店形象展示 (Stores & Facilities Showcase)
   ========================================================================== */
.stores-section {
  background-color: var(--color-warm-light);
  color: var(--color-navy);
  border-bottom: 1px solid var(--color-border-light);
}

.stores-section .section-title {
  color: var(--color-navy);
}

.stores-section .section-desc {
  color: #475569;
}

.store-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.store-card {
  background: #FFFFFF;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  border: 1px solid #E2E8F0;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.store-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.16);
  border-color: rgba(229, 57, 53, 0.4);
}

.store-card-img-wrap {
  position: relative;
  width: 100%;
  height: 260px;
  overflow: hidden;
  background-color: #0F172A;
}

.store-card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.store-card:hover .store-card-img-wrap img {
  transform: scale(1.08);
}

.store-card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(6px);
  color: #FFFFFF;
  padding: 4px 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  gap: 6px;
}

.store-card-tag i {
  color: var(--color-primary);
}

.store-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.store-num-badge {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.store-card-title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-navy);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  line-height: 1.25;
  margin-bottom: 12px;
}

.store-card-desc {
  font-size: 0.92rem;
  color: #64748B;
  line-height: 1.65;
  margin-bottom: 16px;
  flex-grow: 1;
}

.store-card-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid #F1F5F9;
}

.store-highlight-pill {
  font-size: 0.78rem;
  font-weight: 600;
  color: #334155;
  background-color: #F8FAFC;
  border: 1px solid #E2E8F0;
  padding: 4px 10px;
  border-radius: 20px;
}

@media (max-width: 1024px) {
  .store-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .store-gallery-grid {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   8 步无尘贴膜施工标准 (8-Step Dust-Free Installation Standards)
   结合 assets 真实施工素材
   ========================================================================== */
.process-section {
  background-color: var(--color-obsidian);
  border-bottom: 1px solid var(--color-border-dark);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-card {
  background-color: var(--color-surface-dark);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
  position: relative;
}

.process-card:hover {
  border-color: rgba(229, 57, 53, 0.5);
  transform: translateY(-5px);
  box-shadow: 0 12px 25px rgba(0, 0, 0, 0.3);
}

.process-card-img {
  height: 180px;
  overflow: hidden;
  position: relative;
}

.process-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.process-card:hover .process-card-img img {
  transform: scale(1.08);
}

.process-step-num {
  position: absolute;
  top: 12px;
  left: 12px;
  width: 34px;
  height: 34px;
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 800;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.process-card-body {
  padding: 20px;
}

.process-card-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  color: #FFFFFF;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.process-card-desc {
  font-size: 0.88rem;
  color: #94A3B8;
  line-height: 1.6;
}

/* ==========================================================================
   官方电子质保查询系统 (E-Warranty Verification Portal)
   ========================================================================== */
.warranty-section {
  background: linear-gradient(135deg, #0A1420 0%, #162436 100%);
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border-dark);
}

.warranty-box {
  background: rgba(13, 17, 23, 0.85);
  border: 1px solid rgba(212, 175, 55, 0.3);
  border-radius: var(--radius-md);
  padding: 50px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.warranty-info-side .gold-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(212, 175, 55, 0.15);
  border: 1px solid rgba(212, 175, 55, 0.4);
  color: #FCD34D;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 18px;
}

.warranty-title {
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 800;
  color: #FFFFFF;
  text-transform: uppercase;
  line-height: 1.15;
  margin-bottom: 16px;
}

.warranty-desc {
  font-size: 1.05rem;
  color: #94A3B8;
  line-height: 1.7;
  margin-bottom: 28px;
}

.warranty-feature-list {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.warranty-feature-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: #E2E8F0;
}

.warranty-feature-list li i {
  color: #D4AF37;
}

.warranty-form-side {
  background: var(--color-surface-dark);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 32px;
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: #CBD5E1;
  margin-bottom: 8px;
}

.form-input {
  width: 100%;
  padding: 14px 16px;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  color: #FFFFFF;
  font-size: 1rem;
  transition: var(--transition);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-primary);
  background-color: rgba(255, 255, 255, 0.08);
  box-shadow: 0 0 10px var(--color-primary-glow);
}

.form-input::placeholder {
  color: #64748B;
}

.sample-queries {
  margin-top: 12px;
  font-size: 0.8rem;
  color: #94A3B8;
}

.sample-tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.08);
  color: #38BDF8;
  padding: 2px 8px;
  border-radius: 2px;
  cursor: pointer;
  margin-left: 6px;
  transition: var(--transition);
}

.sample-tag:hover {
  background: rgba(56, 189, 248, 0.2);
}

/* ==========================================================================
   质保结果弹窗模态框 (Warranty Result Modal)
   ========================================================================== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 20px;
}

.modal-backdrop.open {
  display: flex;
}

.modal-content {
  background: #0F172A;
  border: 1px solid rgba(212, 175, 55, 0.4);
  border-radius: var(--radius-md);
  max-width: 680px;
  width: 100%;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8);
  overflow: hidden;
  animation: modalPop 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}

@keyframes modalPop {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.modal-header {
  background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
  padding: 20px 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: #FCD34D;
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-close-btn {
  background: transparent;
  border: none;
  color: #94A3B8;
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close-btn:hover {
  color: #FFFFFF;
}

.modal-body {
  padding: 28px;
}

.cert-card {
  background: #FFFFFF;
  color: #0F172A;
  border-radius: var(--radius-sm);
  padding: 24px;
  border-left: 6px solid #D4AF37;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.cert-header {
  display: flex;
  justify-content: space-between;
  border-bottom: 2px dashed #E2E8F0;
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.cert-brand {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-navy);
}

.cert-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #ECFDF5;
  color: #059669;
  padding: 4px 10px;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.85rem;
}

.cert-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  font-size: 0.92rem;
}

.cert-item {
  display: flex;
  flex-direction: column;
}

.cert-label {
  color: #64748B;
  font-size: 0.8rem;
  text-transform: uppercase;
}

.cert-val {
  font-weight: 700;
  color: #1E293B;
}

/* ==========================================================================
   全宽深色页脚 (Footer)
   ========================================================================== */
.site-footer {
  background-color: #0A0D12;
  color: #94A3B8;
  border-top: 1px solid var(--color-border-dark);
  padding-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 60px;
}

.footer-brand-desc {
  font-size: 0.95rem;
  line-height: 1.7;
  color: #94A3B8;
  margin-top: 16px;
  max-width: 380px;
}

.footer-col-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 28px;
  height: 2px;
  background-color: var(--color-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: #94A3B8;
  font-size: 0.92rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #FFFFFF;
  padding-left: 6px;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.92rem;
  color: #CBD5E1;
}

.footer-contact-item i {
  color: var(--color-primary);
  margin-top: 4px;
}

.footer-bottom {
  background-color: #05070A;
  padding: 24px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 0.85rem;
  color: #64748B;
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   响应式媒体查询 (Mobile & Tablet 细节精细化适配)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 3.2rem;
  }
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .trust-item:nth-child(2) {
    border-right: none;
  }
  .product-cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .simulator-container {
    grid-template-columns: 1fr;
    padding: 30px;
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .warranty-box {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 36px;
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  /* 1. 移动端顶栏精修 */
  .site-header {
    padding: 12px 0;
  }
  .brand-logo-mark {
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
  }
  .brand-name {
    font-size: 1.15rem;
    white-space: nowrap;
    letter-spacing: 0.5px;
  }
  .brand-text {
    min-width: 0;
  }
  .brand-tagline {
    font-size: 0.58rem;
    letter-spacing: 0.8px;
  }
  
  /* 移动端顶栏隐藏独立质保按钮，主按钮从“预约贴膜”切换为“质保查询” */
  .warranty-nav-btn {
    display: none;
  }
  .nav-main-action-btn {
    padding: 7px 14px;
    font-size: 0.85rem;
    white-space: nowrap;
  }
  .nav-action-group {
    gap: 10px;
  }
  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.08);
  }

  /* 汉堡包全屏抽屉菜单精修 */
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(13, 17, 23, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    padding: 24px 20px;
    border-bottom: 1px solid var(--color-border-dark);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
    flex-direction: column;
    gap: 20px;
    animation: navSlideDown 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  }
  .main-nav.active {
    display: flex;
  }
  @keyframes navSlideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .nav-links {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .nav-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    font-size: 1.15rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
  }
  .nav-link::after {
    display: none;
  }
  .nav-link:active, .nav-link.active {
    background: rgba(229, 57, 53, 0.15);
    color: #FFFFFF;
    border-color: rgba(229, 57, 53, 0.4);
  }

  /* 移动端菜单底部增加质保专区快捷条 */
  .mobile-menu-footer {
    display: block;
    margin-top: 10px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

  /* 2. Hero 区域移动端细节 */
  .hero-section {
    min-height: auto;
    padding-top: 110px;
    padding-bottom: 60px;
  }
  .hero-content {
    padding: 10px 0;
  }
  .hero-badge {
    font-size: 0.8rem;
    letter-spacing: 1px;
    padding: 5px 10px;
    margin-bottom: 16px;
  }
  .hero-title {
    font-size: clamp(2rem, 8vw, 2.5rem);
    line-height: 1.15;
    margin-bottom: 16px;
  }
  .hero-subtitle {
    font-size: 1.02rem;
    line-height: 1.65;
    margin-bottom: 28px;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 12px;
  }
  .hero-cta-group .btn {
    width: 100%;
    padding: 15px 20px;
    font-size: 1rem;
  }

  /* 3. 信任数据栏改用 2x2 对称紧凑网格 */
  .trust-bar-section {
    padding: 24px 0;
  }
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px 12px;
  }
  .trust-item {
    padding: 8px;
    border-right: none;
    border-bottom: none;
    gap: 10px;
    background: #F8FAFC;
    border-radius: var(--radius-sm);
  }
  .trust-icon-box {
    width: 42px;
    height: 42px;
    font-size: 1.3rem;
  }
  .trust-info-num {
    font-size: 1.45rem;
  }
  .trust-info-label {
    font-size: 0.72rem;
  }

  /* 4. 产品卡片移动端精细化对齐 */
  .section {
    padding: 60px 0;
  }
  .section-header {
    margin-bottom: 40px;
  }
  .section-title {
    font-size: 2.1rem;
  }
  .product-cards-grid {
    grid-template-columns: 1fr;
    gap: 46px;
  }
  .product-card-thumb {
    height: 220px;
  }
  .floating-circle-badge {
    top: 220px;
    width: 52px;
    height: 52px;
    font-size: 1.35rem;
  }
  .product-card-body {
    padding: 36px 20px 22px;
  }
  .product-card-title {
    font-size: 1.45rem;
  }

  /* 5. 透光率模拟器移动端细节 */
  .simulator-container {
    padding: 20px 16px;
    gap: 24px;
  }
  .simulator-preview-box {
    min-height: 260px;
  }
  .sim-hud-status {
    bottom: 12px;
    left: 12px;
    right: 12px;
    padding: 8px 12px;
    gap: 12px;
    justify-content: space-between;
  }
  .sim-hud-label {
    font-size: 0.68rem;
  }
  .sim-hud-val {
    font-size: 1.15rem;
  }
  .sim-hud-val.blue {
    font-size: 1.15rem;
  }
  .sim-tab-btn {
    padding: 8px 6px;
    font-size: 0.86rem;
  }
  .sim-slider-wrapper {
    padding: 16px;
  }
  .vlt-slider {
    height: 10px;
  }
  .vlt-slider::-webkit-slider-thumb {
    width: 28px;
    height: 28px;
  }

  /* 6. 门店形象与工序卡片 */
  .store-card-img-wrap {
    height: 210px;
  }
  .store-card-body {
    padding: 20px 16px;
  }
  .store-card-title {
    font-size: 1.35rem;
  }
  .process-card-img {
    height: 200px;
  }
  .process-card-body {
    padding: 16px;
  }

  /* 7. 质保查询与弹窗移动端适配 (防止iOS Safari缩放与溢出) */
  .warranty-box {
    padding: 28px 18px;
    gap: 24px;
  }
  .warranty-title {
    font-size: 2rem;
  }
  .warranty-form-side {
    padding: 20px 16px;
  }
  .form-input {
    font-size: 16px; /* 强制 16px 避免 iOS 输入自动触发 zoom */
    padding: 12px 14px;
  }
  .modal-backdrop {
    padding: 12px;
    align-items: flex-end; /* 移动端以半屏/底部抽屉风格呈现更易触控 */
  }
  .modal-content {
    max-height: 88vh;
    display: flex;
    flex-direction: column;
    border-radius: 12px 12px 0 0;
  }
  .modal-header {
    padding: 16px 20px;
  }
  .modal-title {
    font-size: 1.15rem;
  }
  .modal-body {
    padding: 18px 16px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .cert-card {
    padding: 18px 14px;
  }
  .cert-brand {
    font-size: 1.35rem;
  }
  .cert-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .cert-item {
    border-bottom: 1px solid #F1F5F9;
    padding-bottom: 6px;
  }
  .cert-item:last-child {
    border-bottom: none;
  }

  /* 8. 页脚 */
  .site-footer {
    padding-top: 50px;
  }
  .site-footer .brand-name {
    font-size: 1.25rem;
    white-space: nowrap;
  }
  .site-footer .footer-brand-desc {
    max-width: 100%;
    margin-top: 14px;
    font-size: 0.9rem;
    line-height: 1.75;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px 20px;
    margin-bottom: 40px;
  }
  .footer-grid > div:first-child,
  .footer-grid > div:last-child {
    grid-column: 1 / -1;
  }
  .footer-bottom-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
    font-size: 0.8rem;
  }
}