/* ============================================================
   凯米拉水处理 · 官网首页 V2（浅色环保版）
   风格：Clean Eco-Tech —— 米白底 + 墨绿主色 + 柔和光影 + 大量留白
   重点：技术问答板块前置，视觉有活力，静态可读（SEO 友好）
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root {
  --bg: #F5FAF6;
  --bg-2: #EDF6F1;
  --surface: #FFFFFF;
  --surface-alt: #F8FCFA;

  --ink: #102A21;
  --ink-2: #3A5A4C;
  --muted: #6E8B7C;
  --muted-2: #93AB9E;

  --line: #E2EDE5;
  --line-2: #D3E4D9;

  --green: #12805C;
  --green-dark: #0C5F44;
  --green-soft: #E4F5EC;
  --lime: #56C596;
  --blue: #2E9BD6;
  --blue-soft: #E7F4FB;
  --amber: #E89B2E;
  --amber-soft: #FDF3E3;
  --violet: #7C6BD6;
  --violet-soft: #EFECFB;
  --teal: #0E9C9C;
  --teal-soft: #E2F5F5;

  --shadow-s: 0 1px 2px rgba(16, 42, 33, 0.04), 0 1px 3px rgba(16, 42, 33, 0.03);
  --shadow-m: 0 12px 28px -18px rgba(16, 42, 33, 0.22), 0 2px 6px rgba(16, 42, 33, 0.04);
  --shadow-l: 0 28px 60px -34px rgba(16, 42, 33, 0.34), 0 4px 12px rgba(16, 42, 33, 0.05);

  --radius-xs: 10px;
  --radius-s: 14px;
  --radius-m: 20px;
  --radius-l: 28px;

  --shell: 1200px;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);

  --font-sans: "HarmonyOS Sans SC", "Source Han Sans SC", "PingFang SC",
    "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-num: "SF Pro Display", "HarmonyOS Sans", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 96px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
}

p { margin: 0; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s var(--ease), background 0.25s var(--ease),
    border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
}

img, svg { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

::selection { background: rgba(18, 128, 92, 0.16); color: var(--green-dark); }

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 3px;
  border-radius: 6px;
}

.shell {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 32px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: -60px; left: 24px;
  z-index: 999;
  padding: 10px 18px;
  background: var(--green);
  color: #fff;
  border-radius: 0 0 10px 10px;
  font-weight: 600;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 0; }

/* ---------- 3. 通用 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 14px 26px;
  border: 1px solid transparent;
  border-radius: 100px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    background 0.3s var(--ease), border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.btn .arrow { transition: transform 0.3s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

.btn-primary {
  background: linear-gradient(135deg, var(--green) 0%, #17A46F 100%);
  color: #fff;
  box-shadow: 0 10px 24px -12px rgba(18, 128, 92, 0.6);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -14px rgba(18, 128, 92, 0.66);
}

.btn-ghost {
  background: var(--surface);
  border-color: var(--line-2);
  color: var(--green-dark);
  box-shadow: var(--shadow-s);
}
.btn-ghost:hover {
  border-color: var(--green);
  background: var(--green-soft);
  transform: translateY(-2px);
}

.btn-sm { padding: 10px 18px; font-size: 14px; }
.btn-block { width: 100%; }

.section {
  position: relative;
  padding: 100px 0;
}
.section + .section { padding-top: 20px; }

.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: clamp(28px, 3.2vw, 42px); margin: 12px 0 14px; }

.section-kicker {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--green);
  font-weight: 600;
}

.section-sub { color: var(--ink-2); font-size: 15.5px; }

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--green);
}
.link-more:hover { color: var(--green-dark); gap: 11px; }

/* ---------- 4. 顶部公告条 ---------- */
.topbar {
  background: linear-gradient(90deg, var(--green-dark), #12805C 60%, #1C8F69);
  color: rgba(255, 255, 255, 0.92);
  font-size: 12.5px;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 38px;
}
.topbar-news {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.topbar-news strong { color: #fff; font-weight: 600; }
.live-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #7BE8B4;
  box-shadow: 0 0 0 0 rgba(123, 232, 180, 0.7);
  animation: livePulse 2.2s infinite;
  flex-shrink: 0;
}
@keyframes livePulse {
  0% { box-shadow: 0 0 0 0 rgba(123, 232, 180, 0.55); }
  70% { box-shadow: 0 0 0 8px rgba(123, 232, 180, 0); }
  100% { box-shadow: 0 0 0 0 rgba(123, 232, 180, 0); }
}
.topbar-meta { display: inline-flex; align-items: center; gap: 12px; opacity: 0.9; }
.topbar-meta a { border-bottom: 1px solid rgba(255, 255, 255, 0.4); }
.topbar-meta a:hover { border-bottom-color: #fff; }
.topbar-tel { font-weight: 600; letter-spacing: 0.02em; }
.dot-sep {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.55);
}

/* ---------- 5. 导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.site-header.is-stuck {
  border-bottom-color: var(--line);
  box-shadow: 0 6px 20px -18px rgba(16, 42, 33, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 22px;
  height: 72px;
}

.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 38px; height: 38px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 17px; font-weight: 700; letter-spacing: 0.01em; }
.brand-text em {
  font-style: normal;
  font-family: var(--font-num);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: var(--muted-2);
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav a {
  position: relative;
  padding: 8px 14px;
  font-size: 14.5px;
  color: var(--ink-2);
  border-radius: 100px;
}
.nav a:hover { color: var(--green-dark); background: var(--green-soft); }
.nav a.is-active { color: var(--green-dark); font-weight: 600; }
.nav a.is-active::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 2px;
  transform: translateX(-50%);
  width: 16px; height: 2px;
  border-radius: 2px;
  background: var(--green);
}

.header-actions { display: flex; align-items: center; gap: 10px; }

.burger {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  position: relative;
}
.burger span {
  position: absolute;
  left: 12px;
  width: 18px; height: 1.8px;
  border-radius: 2px;
  background: var(--ink);
  transition: transform 0.3s var(--ease), opacity 0.2s;
}
.burger span:nth-child(1) { top: 15px; }
.burger span:nth-child(2) { top: 21px; }
.burger span:nth-child(3) { top: 27px; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 6. 首屏 ---------- */
.hero {
  position: relative;
  padding: 72px 0 20px;
  overflow: hidden;
  background:
    radial-gradient(70% 80% at 88% 0%, #EAF6FF 0%, transparent 60%),
    radial-gradient(60% 70% at 0% 10%, #E9F7EE 0%, transparent 55%),
    linear-gradient(180deg, #FBFEFC 0%, var(--bg) 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(40px);
  opacity: 0.55;
}
.blob-1 {
  width: 420px; height: 420px;
  right: -120px; top: -120px;
  background: radial-gradient(circle, #BFE7F7, transparent 68%);
  animation: floatY 18s ease-in-out infinite;
}
.blob-2 {
  width: 360px; height: 360px;
  left: -140px; top: 120px;
  background: radial-gradient(circle, #C9EEDA, transparent 68%);
  animation: floatY 22s ease-in-out infinite reverse;
}
.blob-3 {
  width: 300px; height: 300px;
  right: 30%; bottom: -160px;
  background: radial-gradient(circle, #E3F3D9, transparent 68%);
  animation: floatY 26s ease-in-out infinite;
}
@keyframes floatY {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(0, -26px, 0) scale(1.06); }
}
.leaf { position: absolute; }
.leaf-1 { width: 46px; top: 24%; right: 46%; animation: leafSway 12s ease-in-out infinite; }
.leaf-2 { width: 34px; top: 62%; right: 6%; animation: leafSway 15s ease-in-out infinite reverse; }
@keyframes leafSway {
  0%, 100% { transform: translate(0, 0) rotate(-6deg); }
  50% { transform: translate(10px, -18px) rotate(8deg); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 15px;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--green-dark);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
  border-radius: 100px;
  box-shadow: var(--shadow-s);
}
.eyebrow-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--lime);
}

.hero-title {
  font-size: clamp(36px, 4.6vw, 60px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.035em;
  margin: 22px 0 20px;
}
.hero-title .hl {
  position: relative;
  color: var(--green);
  display: inline-block;
}
.hero-title .hl::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 4px;
  height: 10px;
  background: linear-gradient(90deg, rgba(86, 197, 150, 0.36), rgba(86, 197, 150, 0.05));
  border-radius: 6px;
  z-index: -1;
}

.hero-lead {
  max-width: 560px;
  font-size: 16px;
  color: var(--ink-2);
  line-height: 1.82;
}
.hero-lead strong { color: var(--green-dark); font-weight: 600; }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 26px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 13px;
  color: var(--muted);
}
.hero-points li { display: inline-flex; align-items: center; gap: 7px; }
.hero-points li::before {
  content: "";
  width: 15px; height: 15px;
  border-radius: 50%;
  background-color: var(--green-soft);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M3 6.2l2 2 4-4.4' fill='none' stroke='%2312805C' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-size: 15px;
  flex-shrink: 0;
}

/* 今日问答卡 */
.daily-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  padding: 26px 26px 22px;
  box-shadow: var(--shadow-l);
  position: relative;
}
.daily-card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(86, 197, 150, 0.5), rgba(46, 155, 214, 0.25), transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.daily-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line-2);
}
.daily-kicker {
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--muted-2);
}
.daily-head h2 { font-size: 20px; margin-top: 4px; }
.daily-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--green-dark);
  background: var(--green-soft);
  border-radius: 100px;
  white-space: nowrap;
}
.daily-badge::before {
  content: "";
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--green);
  animation: livePulse 2.4s infinite;
}

.daily-list { padding: 14px 0 6px; }
.daily-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 0;
}
.daily-list a {
  font-size: 14.5px;
  color: var(--ink);
  line-height: 1.55;
}
.daily-list a:hover { color: var(--green); }
.daily-cat {
  flex-shrink: 0;
  margin-top: 2px;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 11px;
  font-weight: 600;
}
.cat-coag { color: var(--green-dark); background: var(--green-soft); }
.cat-floc { color: #1B6E96; background: var(--blue-soft); }
.cat-select { color: #96601A; background: var(--amber-soft); }
.cat-ops { color: #5145A8; background: var(--violet-soft); }
.cat-fluoride { color: #0A7272; background: var(--teal-soft); }

.daily-calendar {
  margin-top: 8px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-2);
}
.cal-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--muted);
  margin-bottom: 10px;
}
.cal-head time {
  font-family: var(--font-num);
  color: var(--ink-2);
  font-size: 12px;
}
.cal-days {
  display: flex;
  justify-content: space-between;
  gap: 6px;
}
.cal-days li {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  font-size: 10.5px;
  color: var(--muted-2);
}
.cal-days i {
  display: block;
  width: 100%;
  height: 5px;
  border-radius: 3px;
  background: var(--line);
}
.cal-days li.is-on i { background: var(--lime); }
.cal-days li.is-today span { color: var(--green); font-weight: 700; }
.cal-days li.is-today i {
  background: var(--green);
  box-shadow: 0 0 0 3px rgba(18, 128, 92, 0.12);
}

.daily-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--green);
}
.daily-link:hover { color: var(--green-dark); }

/* 信任数字 */
.hero-stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 56px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.stat {
  padding: 0 26px;
  border-left: 1px solid var(--line);
}
.stat:first-child { border-left: 0; padding-left: 0; }
.stat strong {
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--green-dark);
}
.stat sup {
  font-size: 13px;
  color: var(--green);
  margin-left: 2px;
  font-weight: 600;
}
.stat span {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  margin-top: 2px;
}

/* ---------- 7. 问答跑马灯 ---------- */
.ticker {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin-top: 26px;
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.ticker-label {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 0 20px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  position: relative;
  z-index: 2;
}
.ticker-label::after {
  content: "";
  position: absolute;
  right: -14px; top: 0;
  width: 14px; height: 100%;
  background: linear-gradient(90deg, rgba(228, 245, 236, 0.9), transparent);
}
.ticker-viewport { flex: 1; overflow: hidden; }
.ticker-track {
  display: flex;
  align-items: center;
  gap: 38px;
  padding: 11px 0 11px 30px;
  width: max-content;
  animation: tickerRun 42s linear infinite;
}
.ticker:hover .ticker-track { animation-play-state: paused; }
@keyframes tickerRun {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.ticker-track li {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 13px;
  white-space: nowrap;
}
.ticker-track a { color: var(--ink-2); }
.ticker-track a:hover { color: var(--green); }
.ticker-track a::before {
  content: "Q";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px; height: 16px;
  margin-right: 7px;
  border-radius: 4px;
  background: var(--green-soft);
  color: var(--green);
  font-family: var(--font-num);
  font-size: 9.5px;
  font-weight: 700;
  vertical-align: 1px;
}
.ticker-track span {
  font-family: var(--font-num);
  color: var(--muted-2);
  font-size: 11.5px;
}

/* ---------- 8. 产品 ---------- */
.product-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.product-card {
  position: relative;
  padding: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-s);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease),
    border-color 0.4s var(--ease);
}
.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-l);
  border-color: rgba(18, 128, 92, 0.28);
}

/* 产品实拍图：卡片头图 */
.product-media {
  position: relative;
  margin: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--surface-alt);
}
.product-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.7s var(--ease);
}
.product-card:hover .product-media img { transform: scale(1.045); }
.product-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(18, 128, 92, 0) 72%, rgba(18, 128, 92, 0.10));
  pointer-events: none;
}
.product-media.media-blue::after {
  background: linear-gradient(180deg, rgba(46, 155, 214, 0) 72%, rgba(46, 155, 214, 0.10));
}
.product-body { padding: 24px 30px 26px; }

.series-badge {
  display: inline-block;
  padding: 4px 11px;
  font-family: var(--font-num);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--green-dark);
  background: var(--green-soft);
  border-radius: 6px;
}
.badge-blue { color: #1B6E96; background: var(--blue-soft); }

.product-card h3 { font-size: 24px; margin: 12px 0 10px; }
.product-card > p {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.8;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 18px 0;
}
.tags li {
  padding: 5px 12px;
  font-size: 12.5px;
  color: var(--ink-2);
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: 100px;
}

.spec-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.spec-row dt { font-size: 11.5px; color: var(--muted); }
.spec-row dd { font-size: 14px; font-weight: 600; color: var(--ink); margin-top: 2px; }

/* ---------- 9. 技术问答 ---------- */
.section-qa {
  background:
    radial-gradient(60% 50% at 100% 0%, #EAF7F0 0%, transparent 55%),
    linear-gradient(180deg, var(--bg) 0%, #F1F9F4 40%, var(--bg) 100%);
}

.qa-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 26px;
}
.qa-head h2 {
  font-size: clamp(28px, 3.2vw, 42px);
  margin: 12px 0 14px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.qa-updated {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 11px;
  font-size: 12px;
  font-weight: 600;
  color: var(--green-dark);
  background: #fff;
  border: 1px solid var(--line-2);
  border-radius: 100px;
  box-shadow: var(--shadow-s);
  transform: translateY(-3px);
}
.qa-updated::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--lime);
  animation: livePulse 2.4s infinite;
}
.qa-head .section-sub { max-width: 640px; }
.qa-head time { color: var(--green-dark); font-weight: 600; }
.qa-head .section-sub strong { color: var(--green-dark); }
.qa-all { flex-shrink: 0; margin-bottom: 4px; }

.qa-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin-bottom: 22px;
  scrollbar-width: none;
}
.qa-tabs::-webkit-scrollbar { display: none; }
.qa-tab {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  font-size: 13.5px;
  color: var(--ink-2);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.28s var(--ease);
}
.qa-tab span {
  font-family: var(--font-num);
  font-size: 11px;
  color: var(--muted-2);
  background: var(--surface-alt);
  padding: 1px 6px;
  border-radius: 100px;
}
.qa-tab:hover { border-color: var(--green); color: var(--green-dark); }
.qa-tab.is-active {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
  box-shadow: 0 8px 20px -12px rgba(18, 128, 92, 0.7);
}
.qa-tab.is-active span { background: rgba(255, 255, 255, 0.2); color: #fff; }

.qa-list { display: grid; gap: 12px; }

.qa-item {
  position: relative;
  display: grid;
  grid-template-columns: 4px 1fr;
  gap: 0;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease), opacity 0.3s var(--ease);
}
.qa-item:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-m);
  border-color: var(--line-2);
}
.qa-item.is-hidden { display: none; }

.qa-cat-bar { background: var(--green); }
.qa-cat-bar.cat-floc { background: var(--blue); }
.qa-cat-bar.cat-select { background: var(--amber); }
.qa-cat-bar.cat-ops { background: var(--violet); }
.qa-cat-bar.cat-fluoride { background: var(--teal); }

.qa-body { padding: 20px 24px 18px; }

.qa-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11.5px;
  color: var(--muted-2);
  font-family: var(--font-num);
  margin-bottom: 8px;
}
.qa-meta .qa-cat {
  font-family: var(--font-sans);
  padding: 2px 9px;
  border-radius: 5px;
  font-size: 11.5px;
  font-weight: 600;
}
.qa-meta time { margin-left: auto; }

.qa-new {
  padding: 2px 9px;
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 600;
  color: #96601A;
  background: var(--amber-soft);
  border-radius: 5px;
}
.qa-new.is-yesterday {
  color: #5145A8;
  background: var(--violet-soft);
}

.qa-q {
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.qa-a {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.85;
}
.qa-a strong { color: var(--ink); font-weight: 600; }

.qa-more { margin-top: 10px; }
.qa-more summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--green);
  cursor: pointer;
  list-style: none;
  padding: 4px 0;
}
.qa-more summary::-webkit-details-marker { display: none; }
.qa-more summary::after {
  content: "＋";
  font-size: 12px;
  transition: transform 0.3s var(--ease);
}
.qa-more[open] summary::after { transform: rotate(45deg); }
.qa-more summary:hover { color: var(--green-dark); }
.qa-more > ol,
.qa-more > ul,
.qa-more > p {
  margin-top: 10px;
  padding: 14px 16px;
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius-s);
  font-size: 13.5px;
  color: var(--ink-2);
  line-height: 1.85;
}
.qa-more ol { counter-reset: step; padding-left: 16px; }
.qa-more ol li {
  position: relative;
  padding-left: 22px;
  margin-bottom: 6px;
  list-style: none;
  counter-increment: step;
}
.qa-more ol li::before {
  content: counter(step);
  position: absolute;
  left: 0; top: 3px;
  width: 16px; height: 16px;
  display: grid;
  place-items: center;
  font-size: 10px;
  font-family: var(--font-num);
  color: var(--green);
  background: var(--green-soft);
  border-radius: 5px;
}
.qa-more ul li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 5px;
}
.qa-more ul li::before {
  content: "";
  position: absolute;
  left: 2px; top: 10px;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--lime);
}

.qa-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 24px;
  padding: 22px 26px;
  background: linear-gradient(110deg, var(--green-soft), #F2FBF6 60%, var(--blue-soft));
  border: 1px solid rgba(18, 128, 92, 0.14);
  border-radius: var(--radius-m);
}
.qa-foot p { font-size: 14px; color: var(--ink-2); max-width: 640px; }

/* ---------- 10. 解决方案 ---------- */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.solution-card {
  position: relative;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
}
.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-m);
  border-color: rgba(18, 128, 92, 0.26);
}
.sol-icon {
  display: grid;
  place-items: center;
  width: 46px; height: 46px;
  border-radius: 13px;
  background: var(--surface-alt);
  margin-bottom: 14px;
}
.sol-icon svg { width: 34px; height: 34px; }
.solution-card h3 { font-size: 17.5px; margin-bottom: 7px; }
.solution-card p { font-size: 13.5px; color: var(--muted); line-height: 1.72; }
.sol-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 14px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--green);
  opacity: 0;
  transform: translateY(4px);
  transition: all 0.32s var(--ease);
}
.solution-card:hover .sol-link { opacity: 1; transform: none; }

/* ---------- 11. 对照表 ---------- */
.table-wrap {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-s);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}
.compare-table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  font-size: 14px;
}
.compare-table thead th {
  padding: 20px 24px;
  text-align: left;
  font-size: 15px;
  font-weight: 700;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.th-series {
  display: block;
  font-family: var(--font-num);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--green);
  margin-bottom: 3px;
  font-weight: 600;
}
.compare-table tbody th {
  padding: 15px 24px;
  width: 22%;
  text-align: left;
  font-weight: 600;
  color: var(--ink);
  background: #FCFEFD;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}
.compare-table tbody td {
  padding: 15px 24px;
  color: var(--ink-2);
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td { border-bottom: 0; }
.compare-table tbody tr { transition: background 0.2s var(--ease); }
.compare-table tbody tr:hover { background: #F7FCF9; }

.table-note { margin-top: 14px; font-size: 12.5px; color: var(--muted); }

/* ---------- 12. 服务流程 ---------- */
.section-flow { padding-top: 40px; }
.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  counter-reset: f;
}
.flow-steps li {
  position: relative;
  padding: 26px 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
}
.flow-steps li::after {
  content: "";
  position: absolute;
  top: 42px; right: -10px;
  width: 10px; height: 2px;
  background: var(--line-2);
}
.flow-steps li:last-child::after { display: none; }
.flow-no {
  display: inline-grid;
  place-items: center;
  width: 30px; height: 30px;
  border-radius: 9px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 12px;
}
.flow-steps h3 { font-size: 16.5px; margin-bottom: 6px; }
.flow-steps p { font-size: 13px; color: var(--muted); line-height: 1.7; }

/* 烧杯小试实拍：三步对比 */
.jar-strip { margin-top: 60px; }
.jar-head { text-align: center; margin-bottom: 24px; }
.jar-head h3 { font-size: 22px; }
.jar-head p { margin-top: 8px; font-size: 14px; color: var(--muted); }
.jar-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.jar-card {
  margin: 0;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.jar-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-l);
}
.jar-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
}
.jar-card figcaption { padding: 16px 18px 18px; display: grid; gap: 5px; }
.jar-step {
  justify-self: start;
  padding: 3px 10px;
  font-family: var(--font-num);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--green-dark);
  background: var(--green-soft);
  border-radius: 6px;
}
.jar-step-mid { color: #1B6E96; background: var(--blue-soft); }
.jar-card strong { font-size: 16.5px; }
.jar-card em { font-style: normal; font-size: 13px; color: var(--muted); line-height: 1.7; }

/* ---------- 13. 关于 + 询盘 ---------- */
.final-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.about-card, .rfq-card {
  padding: 38px;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-s);
}
.about-card h2 { font-size: 28px; margin: 12px 0 16px; }
.about-card p {
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.88;
  margin-bottom: 12px;
}
.capability-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}
.capability-list li {
  padding: 6px 13px;
  font-size: 12.5px;
  color: var(--green-dark);
  background: var(--green-soft);
  border-radius: 8px;
}

.rfq-card {
  background: linear-gradient(170deg, #FFFFFF 0%, #F7FCF9 100%);
  border-color: rgba(18, 128, 92, 0.2);
  scroll-margin-top: 100px;
}
.rfq-card h2 { font-size: 26px; margin-bottom: 6px; }
.rfq-sub { font-size: 13.5px; color: var(--muted); margin-bottom: 22px; }

.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field { display: block; margin-bottom: 12px; }
.field > span {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 6px;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 11px 13px;
  font-size: 14px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line-2);
  border-radius: 10px;
  transition: border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
  appearance: none;
}
.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5L6 6.5l5-5' fill='none' stroke='%236E8B7C' stroke-width='1.4' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 13px center;
  background-size: 12px;
  padding-right: 34px;
}
.field textarea { resize: vertical; min-height: 80px; line-height: 1.65; }
.field input::placeholder,
.field textarea::placeholder { color: var(--muted-2); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(18, 128, 92, 0.1);
}

.form-tip {
  min-height: 18px;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--green);
}
.form-tip.is-error { color: #C0392B; }

/* 蜜罐字段：正常访客看不见，机器人会填 */
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}

.rfq-contact {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 9px;
}
.rfq-contact div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  font-size: 12.5px;
}
.rfq-contact span { color: var(--muted); flex-shrink: 0; }
.rfq-contact strong { font-weight: 500; color: var(--ink-2); text-align: right; }
.rfq-contact strong a { color: var(--green); border-bottom: 1px solid rgba(18, 128, 92, 0.25); }
.rfq-contact strong a:hover { border-bottom-color: var(--green); }

/* ---------- 14. 页脚 ---------- */
.site-footer {
  margin-top: 40px;
  padding: 56px 0 28px;
  background: #FBFEFC;
  border-top: 1px solid var(--line);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 48px;
  padding-bottom: 36px;
}
.footer-brand p {
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.8;
}
.footer-contact {
  display: grid;
  gap: 5px;
  margin-top: 16px;
  font-style: normal;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}
.footer-contact span { position: relative; padding-left: 16px; }
.footer-contact span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1.5px solid var(--green);
}
.footer-contact a {
  padding-left: 16px;
  color: var(--ink-2);
  font-weight: 500;
  width: fit-content;
}
.footer-contact a:hover { color: var(--green); text-decoration: underline; }
.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.footer-nav h4 {
  font-size: 13px;
  margin-bottom: 12px;
  color: var(--ink);
}
.footer-nav a {
  display: block;
  padding: 4px 0;
  font-size: 13px;
  color: var(--muted);
}
.footer-nav a:hover { color: var(--green); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--muted-2);
}
.footer-note { opacity: 0.85; }

/* ---------- 15. 浮动按钮 ---------- */
.float-qa {
  display: none;
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 70;
  padding: 12px 20px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--green), #17A46F);
  box-shadow: 0 14px 30px -12px rgba(18, 128, 92, 0.75);
}

/* ---------- 16. 入场动效 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
  transition-delay: calc(var(--d, 0) * 80ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 17. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .daily-card { max-width: 560px; }
  .final-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 30px; }
}

@media (max-width: 920px) {
  .nav {
    position: fixed;
    top: 110px; left: 16px; right: 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 10px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow-l);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.28s var(--ease), transform 0.28s var(--ease), visibility 0.28s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: none; }
  .nav a { padding: 11px 12px; border-radius: 10px; }
  .nav a.is-active::after { display: none; }
  .burger { display: block; }
  .header-actions .btn-sm { display: none; }

  .product-grid { grid-template-columns: 1fr; }
  .solution-grid { grid-template-columns: 1fr 1fr; }
  .flow-steps { grid-template-columns: 1fr 1fr; }
  .flow-steps li::after { display: none; }
  .jar-grid { grid-template-columns: 1fr; }
  .section { padding: 76px 0; }
  .section + .section { padding-top: 12px; }
  .footer-nav { grid-template-columns: 1fr 1fr; }
  .float-qa { display: inline-block; }
  .topbar-meta span:first-child,
  .topbar-meta .dot-sep { display: none; }
}

@media (max-width: 680px) {
  .shell { padding: 0 20px; }
  .section { padding: 62px 0; }
  .section + .section { padding-top: 8px; }
  .header-inner { height: 64px; }
  .nav { top: 102px; }
  .hero { padding-top: 44px; }
  .hero-title { font-size: clamp(30px, 8.6vw, 40px); }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 16px 0; margin-top: 40px; }
  .stat { padding: 0 16px; }
  .stat:nth-child(odd) { border-left: 0; padding-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); padding-top: 14px; }
  .stat strong { font-size: 25px; }

  .topbar-inner { height: 34px; font-size: 11.5px; }
  .topbar-news strong:last-of-type { display: none; }
  .topbar-meta a[href="#rfq"] { display: none; }
  .topbar-tel { font-weight: 600; letter-spacing: 0.02em; }

  .qa-head { flex-direction: column; align-items: flex-start; gap: 14px; }
  .qa-all { margin-bottom: 0; }
  .qa-body { padding: 16px 18px 16px; }
  .qa-q { font-size: 16px; }
  .qa-a { font-size: 14px; }
  .qa-meta { flex-wrap: wrap; gap: 8px; }
  .qa-meta time { margin-left: 0; width: 100%; }

  .solution-grid { grid-template-columns: 1fr; }
  .flow-steps { grid-template-columns: 1fr; }
  .about-card, .rfq-card { padding: 26px 20px; }
  .field-row { grid-template-columns: 1fr; }
  .rfq-contact div { flex-direction: column; gap: 2px; }
  .rfq-contact strong { text-align: left; }
  .product-body { padding: 18px 20px 22px; }
  .product-card h3 { font-size: 21px; }
  .footer-nav { grid-template-columns: 1fr 1fr; gap: 20px; }
  .qa-foot { flex-direction: column; align-items: flex-start; }
}

/* ---------- 18. 无障碍降级 ---------- */
/* ==========================================================================
   内容站扩展：问答卡链接、行业资讯板块
   ========================================================================== */

/* 问答标题改为可点击链接（指向详情页） */
.qa-q a { color: inherit; }
.qa-q a:hover { color: var(--green-dark); text-decoration: underline; text-underline-offset: 4px; }

.qa-head-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* 行业资讯板块 */
.section-news { background: linear-gradient(180deg, var(--bg) 0%, #FFFFFF 100%); }
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
.news-card {
  position: relative;
  padding: 26px 26px 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s var(--ease);
}
.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-m);
  border-color: rgba(18, 128, 92, 0.26);
}
.news-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}
.news-tag {
  padding: 3px 9px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--green-dark);
  background: var(--green-soft);
  border-radius: 6px;
}
.news-card-meta time {
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--muted-2);
}
.news-card h3 {
  margin-bottom: 10px;
  font-size: 17px;
  line-height: 1.55;
  font-weight: 650;
}
.news-card h3 a { color: var(--ink); }
.news-card h3 a:hover { color: var(--green-dark); }
.news-card p {
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-2);
}
.news-more {
  display: flex;
  justify-content: center;
  margin-top: 26px;
}

@media (max-width: 900px) {
  .news-grid { grid-template-columns: 1fr; }
  .qa-head-actions { width: 100%; }
}

/* ---------- 语言切换 ---------- */
.lang-switch {
  display: inline-flex;
  align-items: center;
  padding: 6px 11px;
  font-family: var(--font-num);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--green-dark);
  background: var(--surface);
  border: 1px solid var(--line-2);
  border-radius: 999px;
  white-space: nowrap;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}
.lang-switch:hover { border-color: var(--green); background: var(--green-soft); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
  .ticker-track { animation: none; }
}