/* ============================================================
   妥适科技 · 全站样式
   品牌色：#245CBB
   ============================================================ */

/* ---------- 设计令牌（CSS 变量） ---------- */
:root {
  /* 品牌色 */
  --brand: #245CBB;
  --brand-dark: #1A4791;
  --brand-darker: #143B7A;
  --brand-light: #EAF1FA;
  --brand-soft: #F4F8FD;
  --brand-tint: #DCE7F5;

  /* 中性 */
  --ink: #1A2233;
  --ink-2: #4A5568;
  --ink-3: #6B7280;
  --ink-4: #9CA3AF;
  --border: #E5E7EB;
  --border-2: #EEF1F5;
  --bg: #FAF9F6;
  --card: #FFFFFF;
  --subtle: #F3F5F8;

  /* 语义 */
  --success: #1F9D55;
  --warning: #D97706;
  --danger: #DC2626;

  /* 圆角 */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* 阴影 */
  --sh-1: 0 1px 2px rgba(20, 35, 70, .04), 0 1px 1px rgba(20, 35, 70, .03);
  --sh-2: 0 4px 12px rgba(20, 35, 70, .06), 0 2px 4px rgba(20, 35, 70, .04);
  --sh-3: 0 12px 32px rgba(20, 35, 70, .10), 0 4px 12px rgba(20, 35, 70, .05);
  --sh-brand: 0 10px 30px rgba(36, 92, 187, .22);

  /* 间距 */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 20px;
  --s-6: 24px;
  --s-8: 32px;
  --s-10: 40px;
  --s-12: 48px;
  --s-16: 64px;
  --s-20: 80px;

  /* 字号 */
  --t-xs: 13px;
  --t-sm: 15px;
  --t-base: 17px;
  --t-md: 19px;
  --t-lg: 22px;
  --t-xl: 28px;
  --t-2xl: 36px;
  --t-3xl: 48px;
  --t-4xl: 64px;

  /* 动画 */
  --ease: cubic-bezier(.16,1,.3,1);
  --ease-out: cubic-bezier(.7,0,.84,0);

  /* 容器 */
  --container: 1200px;
  --container-narrow: 880px;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC",
               "WenQuanYi Micro Hei", system-ui, sans-serif;
  font-size: var(--t-base);
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  font-feature-settings: "tnum" 1;
}
img, svg, video { max-width: 100%; height: auto; display: block; }
a { color: var(--brand); text-decoration: none; transition: color .15s var(--ease); }
a:hover { color: var(--brand-dark); }
button { font: inherit; cursor: pointer; }
input, textarea, select { font: inherit; color: inherit; }

/* 适老化：可读性优先 */
@media (min-width: 768px) { body { font-size: var(--t-md); } }

/* ---------- 排版 ---------- */
h1, h2, h3, h4 { color: var(--ink); font-weight: 700; letter-spacing: -.02em; line-height: 1.2; margin: 0 0 var(--s-4); }
h1 { font-size: clamp(36px, 6vw, var(--t-4xl)); letter-spacing: -.03em; }
h2 { font-size: clamp(28px, 4vw, var(--t-2xl)); }
h3 { font-size: clamp(22px, 2.4vw, var(--t-xl)); }
h4 { font-size: var(--t-lg); }
p { margin: 0 0 var(--s-4); }
.lead { font-size: var(--t-lg); color: var(--ink-2); line-height: 1.65; }
.muted { color: var(--ink-3); }
.tnum { font-variant-numeric: tabular-nums; }
.text-xs { font-size: var(--t-xs); }
.text-sm { font-size: var(--t-sm); }
.text-lg { font-size: var(--t-lg); }

/* ---------- 布局 ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--s-5); }
.container-narrow { max-width: var(--container-narrow); margin: 0 auto; padding: 0 var(--s-5); }
.section { padding: clamp(48px, 8vw, 96px) 0; }
.section-sm { padding: clamp(40px, 6vw, 64px) 0; }
.section-head { text-align: center; margin-bottom: var(--s-10); }
.section-head .eyebrow { display: inline-block; font-size: var(--t-sm); color: var(--brand); font-weight: 600; letter-spacing: .1em; margin-bottom: var(--s-3); }
.section-head .lead { max-width: 640px; margin: 0 auto; }
.grid { display: grid; gap: var(--s-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 960px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* ---------- 顶部导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border-2);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
  max-width: var(--container);
  margin: 0 auto; padding: 0 var(--s-5);
}
.nav-brand { display: flex; align-items: center; gap: var(--s-3); text-decoration: none; color: var(--ink); }
/* <picture> 只做 WebP/PNG 格式协商，不参与布局，否则多包一层会改变 flex 尺寸计算 */
.nav-brand picture, .footer-brand picture { display: contents; }
.nav-brand img { height: 36px; width: auto; display: block; }
/* 手机端 logo：先缩半（30px->15px），应用户要求再放大 50% -> 22px，导航高度固定 68px 不受影响 */
@media (max-width: 640px) { .nav-brand img { height: 22px; } }
.nav-brand-text { font-weight: 700; font-size: 18px; letter-spacing: -.01em; }
.nav-brand-text small { display: block; font-size: 12px; color: var(--ink-3); font-weight: 500; letter-spacing: .04em; }
.nav-links { display: flex; gap: var(--s-2); align-items: center; }
.nav-link {
  padding: var(--s-2) var(--s-4); border-radius: var(--r-md);
  color: var(--ink-2); font-size: 15px; font-weight: 500;
  transition: all .15s var(--ease);
}
.nav-link:hover, .nav-link.active { color: var(--brand); background: var(--brand-light); }
.nav-cta { margin-left: var(--s-3); }
.nav-menu-btn {
  display: none; align-items: center; justify-content: center;
  width: 40px; height: 40px; border: 1px solid var(--border);
  border-radius: var(--r-md); background: #fff; color: var(--ink);
}
/* 注意：此 media 必须写在 .nav-menu-btn 基础规则之后，否则 display:none 会因源码顺序覆盖掉断点内的 inline-flex */
@media (max-width: 920px) {
  .nav-links { display: none; }
  .nav-cta-desktop { display: none; }
  .nav-menu-btn { display: inline-flex; }
}

/* 移动菜单
   注意：此元素必须写在 <header class="nav"> 之外。.nav 带 backdrop-filter，
   会给 position:fixed 后代创建包含块，导致 inset 相对 68px 高的 nav 解析、菜单塌成一条。 */
.mobile-menu {
  display: flex; position: fixed; inset: 68px 0 0; z-index: 99;
  background: #fff; padding: var(--s-6) var(--s-5);
  border-top: 1px solid var(--border-2);
  flex-direction: column; gap: var(--s-3);
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  /* 展开/收起动画：不用 display 切换（display:none 不可过渡），
     用透明度 + 下滑位移动画；visibility 延迟切换保证收起后不拦截点击 */
  opacity: 0; visibility: hidden; transform: translateY(-14px);
  pointer-events: none;
  transition: opacity .28s var(--ease), transform .28s var(--ease),
              visibility 0s linear .28s;
}
.mobile-menu.open {
  opacity: 1; visibility: visible; transform: none;
  pointer-events: auto;
  transition: opacity .28s var(--ease), transform .28s var(--ease);
}
/* 菜单项逐个滑入的级联节奏 */
.mobile-menu > * {
  opacity: 0; transform: translateX(-10px);
  transition: opacity .26s var(--ease), transform .26s var(--ease);
}
.mobile-menu.open > * { opacity: 1; transform: none; }
.mobile-menu.open > *:nth-child(1) { transition-delay: .05s; }
.mobile-menu.open > *:nth-child(2) { transition-delay: .09s; }
.mobile-menu.open > *:nth-child(3) { transition-delay: .13s; }
.mobile-menu.open > *:nth-child(4) { transition-delay: .17s; }
.mobile-menu.open > *:nth-child(5) { transition-delay: .21s; }
.mobile-menu.open > *:nth-child(6) { transition-delay: .25s; }
/* 收起时级联延迟清零，避免收起拖泥带水 */
.mobile-menu:not(.open) > * { transition-delay: 0s; }
@media (prefers-reduced-motion: reduce) {
  .mobile-menu, .mobile-menu > * { transition: none; transform: none; }
}
.mobile-menu .nav-link { font-size: 18px; padding: var(--s-3) var(--s-4); }
.mobile-menu .btn { margin-top: var(--s-4); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  padding: 12px 22px; border-radius: var(--r-md); border: 1px solid transparent;
  font-weight: 600; font-size: 15px;
  transition: all .15s var(--ease);
  text-decoration: none; white-space: nowrap;
  user-select: none;
}
.btn:active { transform: scale(.98); }
.btn-primary {
  background: var(--brand); color: #fff;
  box-shadow: var(--sh-brand);
}
.btn-primary:hover { background: var(--brand-dark); color: #fff; transform: translateY(-1px); box-shadow: 0 14px 36px rgba(36, 92, 187, .28); }
.btn-ghost {
  background: transparent; color: var(--brand); border-color: var(--brand);
}
.btn-ghost:hover { background: var(--brand-light); }
.btn-light {
  background: #fff; color: var(--brand); border-color: var(--border);
}
.btn-light:hover { border-color: var(--brand); }
.btn-lg { padding: 16px 28px; font-size: 17px; border-radius: var(--r-md); }
.btn-block { width: 100%; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--card); border: 1px solid var(--border-2);
  border-radius: var(--r-lg); padding: var(--s-6);
  transition: transform .2s var(--ease), box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.card:hover { transform: translateY(-2px); box-shadow: var(--sh-3); border-color: var(--brand-tint); }
.card-feature {
  display: flex; flex-direction: column; gap: var(--s-3);
  background: var(--card); border: 1px solid var(--border-2);
  border-radius: var(--r-lg); padding: var(--s-6);
}
.card-feature .icon-wrap {
  width: 48px; height: 48px; border-radius: var(--r-md);
  background: var(--brand-light); color: var(--brand);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: var(--s-2);
}
.card-feature h3 { margin: 0; font-size: var(--t-lg); }
.card-feature p { color: var(--ink-2); margin: 0; }

/* ---------- Hero ---------- */
/* 背景 = 门店实拍横幅（3:1）。左侧压白色渐变保证文字可读，右侧透出门头品牌字 */
.hero {
  position: relative; overflow: hidden;
  padding: clamp(72px, 10vw, 120px) 0 clamp(48px, 8vw, 96px);
  background-image:
    linear-gradient(90deg, rgba(255,255,255,.97) 0%, rgba(255,255,255,.9) 42%, rgba(255,255,255,.42) 78%, rgba(255,255,255,.18) 100%),
    image-set("../images/hero-storefront.webp" type("image/webp"), "../images/hero-storefront.jpg" type("image/jpeg"));
  background-size: cover, cover;
  background-position: center, center 38%;
  background-repeat: no-repeat;
}
.hero-grid {
  display: grid; grid-template-columns: minmax(0, 620px); gap: var(--s-10); align-items: center;
}
@media (max-width: 960px) { .hero-grid { grid-template-columns: 1fr; } }
.hero h1 { margin-bottom: var(--s-5); }
.hero h1 .accent { color: var(--brand); }
.hero .lead { max-width: 540px; margin-bottom: var(--s-8); }
.hero-actions { display: flex; gap: var(--s-3); flex-wrap: wrap; }
.hero-trust { display: flex; gap: var(--s-6); margin-top: var(--s-10); flex-wrap: wrap; }
.hero-trust-item { display: flex; align-items: center; gap: var(--s-2); color: var(--ink-2); font-size: var(--t-sm); }
.hero-trust-item .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 0 4px rgba(31, 157, 85, .12); }

/* 小屏：背景裁切更狠，白色遮罩加重保证标题可读 */
@media (max-width: 640px) {
  .hero {
    background-image:
      linear-gradient(180deg, rgba(255,255,255,.95) 0%, rgba(255,255,255,.86) 60%, rgba(255,255,255,.55) 100%),
      image-set("../images/hero-storefront.webp" type("image/webp"), "../images/hero-storefront.jpg" type("image/jpeg"));
    background-position: center, 62% top;
  }
}

/* ---------- 产品卡 ---------- */
.product {
  position: relative;
  background: var(--card); border: 1px solid var(--border-2);
  border-radius: var(--r-xl); padding: var(--s-8);
  display: flex; flex-direction: column;
  transition: all .25s var(--ease);
}
.product:hover { transform: translateY(-4px); box-shadow: var(--sh-3); border-color: var(--brand-tint); }
.product.featured {
  border: 2px solid var(--brand);
  box-shadow: var(--sh-brand);
  transform: scale(1.02);
}
.product.featured:hover { transform: scale(1.02) translateY(-4px); }
.product .ribbon {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--brand); color: #fff;
  padding: 6px 16px; border-radius: var(--r-pill);
  font-size: var(--t-xs); font-weight: 700; letter-spacing: .04em;
}
.product .name { font-size: var(--t-xl); font-weight: 700; margin: 0 0 var(--s-2); }
.product .sub { color: var(--ink-3); font-size: var(--t-sm); margin: 0 0 var(--s-5); }
.product .price { display: flex; align-items: baseline; gap: var(--s-2); margin-bottom: var(--s-6); }
.product .price .num { font-size: var(--t-3xl); font-weight: 800; color: var(--brand); letter-spacing: -.03em; line-height: 1; }
.product .price .yuan { font-size: var(--t-lg); color: var(--brand); font-weight: 600; }
.product .price .cycle { color: var(--ink-3); font-size: var(--t-sm); }
.product .price .old { color: var(--ink-4); font-size: var(--t-sm); text-decoration: line-through; }
.product ul { list-style: none; padding: 0; margin: 0 0 var(--s-6); display: flex; flex-direction: column; gap: var(--s-3); }
.product li { display: flex; gap: var(--s-3); font-size: 15px; color: var(--ink-2); }
.product li svg { color: var(--brand); flex-shrink: 0; margin-top: 3px; }
.product .meta { display: flex; gap: var(--s-4); padding-top: var(--s-5); border-top: 1px dashed var(--border); color: var(--ink-3); font-size: var(--t-sm); }
.product .meta strong { color: var(--ink); font-weight: 600; }
/* 吸附性义齿主图：三档共用的实物图，置于卡片上方居中 */
.product-hero-img {
  display: block; margin: 0 auto;
  width: 100%; max-width: 480px; height: auto;
  border-radius: var(--r-lg);
  filter: drop-shadow(0 12px 32px rgba(36, 92, 187, .12));
  opacity: .8;   /* 整体 20% 透明度，弱化实物图、突出下方三档报价 */
}
@media (max-width: 640px) {
  .product-hero-img { max-width: 320px; }
}

/* ---------- 对比表 ---------- */
.compare {
  width: 100%; border-collapse: separate; border-spacing: 0;
  background: #fff; border: 1px solid var(--border-2);
  border-radius: var(--r-lg); overflow: hidden;
}
.compare th, .compare td { padding: var(--s-4) var(--s-5); text-align: left; border-bottom: 1px solid var(--border-2); font-size: 15px; }
.compare th { background: var(--subtle); font-weight: 600; color: var(--ink); font-size: 14px; }
.compare tr:last-child td { border-bottom: 0; }
.compare th:first-child { width: 28%; }
.compare td.highlight { background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.compare th.highlight { background: var(--brand); color: #fff; }
@media (max-width: 720px) {
  .compare { font-size: 14px; }
  .compare th, .compare td { padding: var(--s-3); }
}

/* ---------- 流程步骤 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-5); position: relative; }
.steps::before {
  content: ""; position: absolute; top: 36px; left: 8%; right: 8%; height: 2px;
  background: repeating-linear-gradient(90deg, var(--brand-tint) 0 8px, transparent 8px 16px);
  z-index: 0;
}
@media (max-width: 960px) { .steps { grid-template-columns: repeat(2, 1fr); } .steps::before { display: none; } }
.step { position: relative; text-align: center; z-index: 1; }
.step .num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 64px; height: 64px; border-radius: 50%;
  background: #fff; border: 2px solid var(--brand);
  color: var(--brand); font-weight: 800; font-size: var(--t-xl);
  margin-bottom: var(--s-4); box-shadow: 0 0 0 6px var(--bg);
}
.step h4 { margin: 0 0 var(--s-2); font-size: 18px; }
.step p { color: var(--ink-2); font-size: 15px; margin: 0; }

/* ---------- FAQ ---------- */
.faq { display: flex; flex-direction: column; gap: var(--s-3); }
.faq-item {
  background: #fff; border: 1px solid var(--border-2);
  border-radius: var(--r-md); overflow: hidden;
  transition: border-color .15s var(--ease);
}
.faq-item[open] { border-color: var(--brand-tint); }
.faq-item summary {
  list-style: none; cursor: pointer;
  padding: var(--s-5) var(--s-6);
  display: flex; align-items: center; justify-content: space-between;
  font-weight: 600; font-size: 17px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: ""; width: 14px; height: 14px;
  border-right: 2px solid var(--ink-3); border-bottom: 2px solid var(--ink-3);
  transform: rotate(45deg); transition: transform .2s var(--ease);
  margin-left: var(--s-3); flex-shrink: 0;
}
.faq-item[open] summary::after { transform: rotate(-135deg); border-color: var(--brand); }
.faq-item .answer { padding: 0 var(--s-6) var(--s-6); color: var(--ink-2); }
.faq-item .answer p:last-child { margin-bottom: 0; }

/* ---------- 评价卡 ---------- */
.quote {
  background: var(--card); border: 1px solid var(--border-2);
  border-radius: var(--r-lg); padding: var(--s-6);
  display: flex; flex-direction: column; gap: var(--s-4);
  position: relative;
}
.quote::before {
  content: ""; position: absolute; top: 16px; right: 20px;
  width: 36px; height: 28px;
  background: var(--brand-light); -webkit-mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='currentColor'><path d='M3 21c3 0 7-1 7-8V5c0-1.25-.75-2-2-2H4c-1.25 0-2 .75-2 2v6c0 7 4 8 7 8zM21 21c-3 0-7-1-7-8V5c0-1.25.75-2 2-2h4c1.25 0 2 .75 2 2v6c0 7-4 8-7 8z'/></svg>") center/contain no-repeat;
          mask: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='currentColor'><path d='M3 21c3 0 7-1 7-8V5c0-1.25-.75-2-2-2H4c-1.25 0-2 .75-2 2v6c0 7 4 8 7 8zM21 21c-3 0-7-1-7-8V5c0-1.25.75-2 2-2h4c1.25 0 2 .75 2 2v6c0 7-4 8-7 8z'/></svg>") center/contain no-repeat;
}
.quote .text { color: var(--ink); line-height: 1.75; flex: 1; }
.quote .who { display: flex; align-items: center; gap: var(--s-3); padding-top: var(--s-4); border-top: 1px dashed var(--border); }
.quote .avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-light), var(--brand-tint));
  color: var(--brand); display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 18px;
}
.quote .name { font-weight: 600; }
.quote .role { font-size: var(--t-sm); color: var(--ink-3); }

/* ---------- 表单 ---------- */
.form { display: grid; gap: var(--s-4); }
.field label {
  display: block; font-size: 14px; font-weight: 600;
  color: var(--ink); margin-bottom: var(--s-2);
}
.field input, .field select, .field textarea {
  width: 100%; padding: 14px var(--s-4);
  border: 1px solid var(--border); border-radius: var(--r-md);
  background: #fff; font-size: 16px;
  transition: border-color .15s var(--ease), box-shadow .15s var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-light);
}
.field textarea { min-height: 100px; resize: vertical; }
.field .hint { font-size: 13px; color: var(--ink-3); margin-top: 6px; }

/* ---------- 数据条 ---------- */
.stat-bar { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-4); padding: var(--s-8); background: var(--card); border: 1px solid var(--border-2); border-radius: var(--r-lg); }
@media (max-width: 720px) { .stat-bar { grid-template-columns: repeat(2, 1fr); } }
.stat { text-align: center; }
.stat .num { font-size: clamp(28px, 4vw, 40px); font-weight: 800; color: var(--brand); letter-spacing: -.03em; line-height: 1; }
.stat .label { color: var(--ink-2); font-size: var(--t-sm); margin-top: 6px; }

/* ---------- 城市覆盖 ---------- */
.cities { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.city {
  background: #fff; border: 1px solid var(--border-2);
  padding: 6px 14px; border-radius: var(--r-pill);
  font-size: 14px; color: var(--ink-2);
  display: inline-flex; align-items: center; gap: 6px;
}
.city::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--brand);
}

/* ---------- CTA 段 ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  color: #fff; border-radius: var(--r-xl);
  padding: clamp(40px, 6vw, 64px);
  text-align: center; position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(255,255,255,.1), transparent 50%),
              radial-gradient(circle at 80% 80%, rgba(255,255,255,.06), transparent 60%);
  pointer-events: none;
}
.cta-band > * { position: relative; }
.cta-band h2 { color: #fff; margin-bottom: var(--s-3); }
.cta-band p { color: rgba(255,255,255,.85); margin-bottom: var(--s-6); }
.cta-band .btn-light { background: #fff; color: var(--brand); }

/* ---------- Footer ---------- */
.footer {
  background: #0F1B2D; color: rgba(255,255,255,.7);
  padding: clamp(48px, 6vw, 72px) 0 var(--s-8); margin-top: var(--s-16);
}
.footer h5 { color: #fff; font-size: 15px; margin: 0 0 var(--s-4); font-weight: 600; }
.footer a { color: rgba(255,255,255,.65); font-size: 14px; line-height: 2; }
.footer a:hover { color: #fff; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: var(--s-8);
}
@media (max-width: 720px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
.footer-brand { display: flex; flex-direction: column; gap: var(--s-3); }
/* 反白版 logo：妥适色块内的文字为透明镂空，暗底可直接透出，不能用 brightness/invert 滤镜（会把中文压成纯白方块） */
.footer-brand img { width: 172px; height: auto; display: block; }
.footer-meta { font-size: 13px; color: rgba(255,255,255,.5); margin-top: var(--s-3); line-height: 1.7; }
.footer-bottom {
  margin-top: var(--s-10); padding-top: var(--s-6);
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--s-3);
  font-size: 13px; color: rgba(255,255,255,.5);
}

/* ---------- 悬浮客服 ---------- */
.float-actions {
  position: fixed; right: var(--s-5); bottom: var(--s-5); z-index: 50;
  display: flex; flex-direction: column; gap: var(--s-3);
}
.float-btn {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--brand); color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  box-shadow: var(--sh-3);
  transition: transform .15s var(--ease);
  border: none;
}
.float-btn:hover { transform: scale(1.06); color: #fff; }
.float-btn.wechat { background: #07C160; }
.float-btn.phone { background: var(--brand); }
.float-btn::after {
  content: ""; position: absolute; inset: 0; border-radius: 50%;
  border: 2px solid currentColor; opacity: .3;
  animation: pulse 2s var(--ease-out) infinite;
}
@keyframes pulse {
  0% { transform: scale(.95); opacity: .4; }
  70% { transform: scale(1.25); opacity: 0; }
  100% { transform: scale(1.25); opacity: 0; }
}

/* ---------- 装饰条 ---------- */
.divider-dot { display: inline-flex; align-items: center; gap: var(--s-2); color: var(--ink-3); font-size: var(--t-sm); }
.divider-dot::before, .divider-dot::after {
  content: ""; width: 24px; height: 1px; background: var(--border);
}

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .float-btn::after { animation: none; }
  * { transition-duration: 0s !important; animation-duration: 0s !important; }
}

/* ---------- 工具类 ---------- */
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; gap: var(--s-4); }
.flex-center { display: flex; align-items: center; gap: var(--s-2); }
.gap-3 { gap: var(--s-3); }
.gap-4 { gap: var(--s-4); }
.mt-6 { margin-top: var(--s-6); }
.mt-8 { margin-top: var(--s-8); }
.mt-10 { margin-top: var(--s-10); }
.text-center { text-align: center; }
.tag {
  display: inline-block; padding: 4px 12px;
  background: var(--brand-light); color: var(--brand);
  border-radius: var(--r-pill);
  font-size: var(--t-xs); font-weight: 600;
}
.tag-warm { background: rgba(217, 119, 6, .12); color: var(--warning); }
.tag-success { background: rgba(31, 157, 85, .12); color: var(--success); }