/* ============ 冷狐宝盒 · ICE BOX · 12站专属样式 ============ */
:root {
  --ice: #0ea5e9;
  --ice-dark: #0284c7;
  --ice-deep: #0c4a6e;
  --ice-light: #38bdf8;
  --ice-soft: #7dd3fc;
  --silver: #f0f9ff;
  --silver-2: #e0f2fe;
  --frost: #f8fafc;
  --paper: #f0f9ff;
  --panel: #ffffff;
  --ink: #0c4a6e;
  --ink-2: #075985;
  --muted: #64748b;
  --muted-2: #94a3b8;
  --line: #bae6fd;
  --line-soft: #e0f2fe;
  --white: #ffffff;
  --shadow: 0 24px 70px rgba(8, 47, 73, .14);
  --shadow-sm: 0 8px 24px rgba(8, 47, 73, .08);
  --shadow-ice: 0 12px 32px rgba(14, 165, 233, .22);
  --glass: rgba(255, 255, 255, .72);
  --glass-2: rgba(255, 255, 255, .45);
  --border: rgba(14, 165, 233, .25);
  --border-soft: rgba(14, 165, 233, .14);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-lg: 26px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html, body { overflow-x: hidden; }
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--ink);
  background: var(--paper);
  background-image: linear-gradient(180deg, #e0f2fe 0%, #f0f9ff 38%, #ffffff 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
  min-height: 100vh;
}
/* fixed 纹理质感层 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .28;
  z-index: 20;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 0.04 0 0 0 0 0.4 0 0 0 0 0.6 0 0 0 0.5 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
}
/* 雪花漂浮层 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 21;
  background-image:
    radial-gradient(2px 2px at 18% 22%, rgba(56,189,248,.5), transparent 60%),
    radial-gradient(1.5px 1.5px at 78% 36%, rgba(125,211,252,.5), transparent 60%),
    radial-gradient(1.5px 1.5px at 42% 78%, rgba(14,165,233,.4), transparent 60%),
    radial-gradient(2px 2px at 88% 88%, rgba(56,189,248,.4), transparent 60%);
  opacity: .5;
}
a { color: var(--ice-dark); text-decoration: none; transition: color .2s; }
a:hover { color: var(--ice); }
button { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
img { display: block; max-width: 100%; }
:focus-visible { outline: 3px solid var(--ice-light); outline-offset: 3px; }
ul, ol { list-style: none; }

/* ============ 1. 浮动圆角导航卡 ============ */
.lh-masthead {
  width: min(1240px, calc(100% - 40px));
  height: 74px;
  margin: 18px auto 0;
  padding: 0 12px 0 15px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: 17px;
  position: sticky;
  top: 8px;
  z-index: 30;
  box-shadow: 0 8px 30px rgba(8, 47, 73, .08), 0 2px 8px rgba(14,165,233,.12);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.lh-brandmark { display: flex; align-items: center; gap: 11px; min-width: max-content; }
.lh-brandmark img { width: 46px; height: 46px; border-radius: 13px; box-shadow: 0 4px 14px rgba(14,165,233,.35); }
.lh-brandmark span { display: grid; gap: 2px; }
.lh-brandmark strong { font-size: 17px; color: var(--ink); font-weight: 800; }
.lh-brandmark small { font-size: 8px; letter-spacing: 1.6px; color: var(--ice); font-weight: 700; }
.lh-nav { display: flex; align-items: center; justify-content: center; gap: 28px; font-size: 14px; color: var(--ink-2); font-weight: 500; }
.lh-nav a { position: relative; padding: 12px 0; }
.lh-nav a::after { content: ""; position: absolute; height: 2px; left: 0; right: 100%; bottom: 5px; background: var(--ice); border-radius: 2px; transition: right .25s ease; }
.lh-nav a:hover { color: var(--ice-dark); }
.lh-nav a:hover::after { right: 0; }
.lh-header-action {
  padding: 13px 18px; color: var(--white); background: linear-gradient(135deg, var(--ice), var(--ice-light));
  border-radius: 11px; font-size: 14px; font-weight: 700; display: inline-flex; align-items: center; gap: 7px;
  box-shadow: 0 6px 18px rgba(14,165,233,.35); transition: transform .2s, box-shadow .2s;
}
.lh-header-action:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(14,165,233,.5); color: var(--white); }
.lh-nav-toggle { display: none; border: 0; background: transparent; font-size: 24px; color: var(--ice-dark); cursor: pointer; }

/* ============ 2. Hero 左右分栏 + 冰晶装置 ============ */
.lh-hero {
  width: min(1240px, calc(100% - 40px));
  margin: 0 auto;
  padding: 60px 0 54px;
  display: grid;
  grid-template-columns: minmax(360px, .9fr) minmax(540px, 1.1fr);
  align-items: center;
  gap: 48px;
  position: relative;
}
.lh-hero::before {
  content: "ICE · BOX · MOBILE DOWNLOAD";
  position: absolute; left: -42px; bottom: 56px;
  writing-mode: vertical-rl; transform: rotate(180deg);
  font: 700 10px/1 Arial, sans-serif; letter-spacing: 2.4px; color: var(--ice-soft);
}
.lh-kicker { display: flex; align-items: center; gap: 10px; margin: 0 0 19px; color: var(--ice-dark); font-size: 12px; font-weight: 800; letter-spacing: 1.4px; }
.lh-kicker span { width: 27px; height: 2px; background: currentColor; border-radius: 2px; }
.lh-hero h1 { font-size: clamp(46px, 5vw, 62px); line-height: 1.05; font-weight: 800; color: var(--ice-deep); letter-spacing: -0.5px; }
.lh-hero-subtitle { max-width: 540px; margin: 22px 0 15px; font-size: 22px; font-weight: 700; line-height: 1.5; color: var(--ink-2); }
.lh-hero-intro { max-width: 540px; color: var(--muted); font-size: 15px; line-height: 1.85; }
.lh-hero-actions { display: flex; align-items: center; gap: 22px; margin-top: 29px; flex-wrap: wrap; }
.lh-solid-action {
  display: inline-flex; align-items: center; gap: 9px; padding: 16px 24px;
  color: var(--white); background: linear-gradient(135deg, var(--ice), var(--ice-light));
  border: 1px solid var(--ice); border-radius: 12px; font-size: 15px; font-weight: 800;
  box-shadow: 0 12px 24px rgba(14,165,233,.3); transition: transform .2s, box-shadow .2s;
}
.lh-solid-action:hover { transform: translateY(-3px); box-shadow: 0 18px 36px rgba(14,165,233,.42); color: var(--white); }
.lh-text-action { font-size: 14px; font-weight: 700; color: var(--ice-dark); border-bottom: 1px solid var(--ice-soft); padding: 10px 0 5px; transition: border-color .2s; }
.lh-text-action:hover { border-color: var(--ice); }
.lh-trust-strip { display: flex; gap: 0; margin: 38px 0 0; padding: 18px 0 0; border-top: 1px solid var(--line-soft); }
.lh-trust-strip li { min-width: 118px; display: flex; align-items: center; gap: 9px; padding-right: 15px; margin-right: 15px; border-right: 1px solid var(--line-soft); font-size: 12px; font-weight: 800; color: var(--ink); }
.lh-trust-strip li:last-child { border: 0; margin-right: 0; }
.lh-trust-strip i { color: var(--ice); font-size: 18px; }
.lh-trust-strip small { color: var(--muted-2); font-size: 9px; font-weight: 500; }

/* 冰晶装置容器 */
.lh-crystal-rig { margin: 0; position: relative; }
.lh-crystal-rig::before {
  content: ""; position: absolute; width: 220px; height: 220px; right: -30px; top: -34px;
  background: radial-gradient(circle, var(--ice-light), transparent 70%); border-radius: 50%; z-index: -1; opacity: .25; filter: blur(12px);
}
.lh-crystal-chrome {
  background: linear-gradient(160deg, #f0f9ff 0%, #e0f2fe 100%);
  border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255,255,255,.7); transform: rotate(1deg);
  position: relative;
}
.lh-crystal-topline {
  min-height: 48px; padding: 0 18px; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center;
  color: var(--ice-deep); border-bottom: 1px solid var(--line-soft); font-size: 11px; letter-spacing: .7px; font-weight: 700;
  background: linear-gradient(180deg, rgba(14,165,233,.08), transparent);
}
.lh-crystal-dots { display: flex; gap: 6px; }
.lh-crystal-dots i { width: 9px; height: 9px; border-radius: 50%; background: var(--ice-soft); }
.lh-crystal-dots i:first-child { background: var(--ice); box-shadow: 0 0 0 3px rgba(14,165,233,.18); }
.lh-crystal-dots i:nth-child(2) { background: var(--ice-light); }
.lh-live-label { justify-self: end; display: flex; align-items: center; gap: 6px; color: var(--ice-dark); font-size: 10px; }
.lh-live-label i { width: 7px; height: 7px; border-radius: 50%; background: var(--ice); box-shadow: 0 0 0 4px rgba(14,165,233,.16); }
.lh-crystal-stage { padding: 22px 18px 18px; display: grid; grid-template-columns: 110px 1fr 110px; gap: 14px; align-items: start; }
.lh-crystal-cats-left { display: grid; gap: 9px; }
.lh-crystal-cat {
  padding: 11px 9px; border-radius: 12px; display: grid; gap: 4px; text-align: center;
  border: 1px solid var(--border-soft); background: var(--white); transition: transform .2s, box-shadow .2s;
}
.lh-crystal-cat:hover { transform: translateY(-2px); box-shadow: var(--shadow-sm); }
.lh-crystal-cat i { font-size: 20px; color: var(--ice); }
.lh-crystal-cat b { font-size: 11px; color: var(--ink); font-weight: 800; }
.lh-crystal-cat small { font-size: 9px; color: var(--muted-2); }
.lh-crystal-cat.blue { background: linear-gradient(135deg, #e0f2fe, #bae6fd); border-color: var(--ice); }
.lh-crystal-cat.blue i { color: var(--ice-dark); }
.lh-crystal-cat.white { background: linear-gradient(135deg, #ffffff, #f0f9ff); }
.lh-crystal-cat.cyan { background: linear-gradient(135deg, #cffafe, #a5f3fc); border-color: #67e8f9; }
.lh-crystal-cat.cyan i { color: #0891b2; }

.lh-phone-mount { position: relative; display: grid; place-items: center; min-height: 320px; }
.lh-phone-mount::before {
  content: ""; position: absolute; inset: 8% 14% 4%; background: radial-gradient(circle at 50% 30%, rgba(14,165,233,.2), transparent 65%);
  border-radius: 30px; z-index: 0;
}
.lh-phone-screen {
  width: 178px; height: 318px; border-radius: 24px; overflow: hidden; border: 5px solid #0c4a6e;
  background: var(--white); box-shadow: 0 18px 36px rgba(8,47,73,.3), inset 0 0 0 1px rgba(255,255,255,.2); position: relative; z-index: 1;
}
.lh-phone-screen img { width: 100%; height: 100%; object-fit: cover; }
.lh-phone-notch { position: absolute; top: 0; left: 50%; transform: translateX(-50%); width: 70px; height: 14px; background: #0c4a6e; border-radius: 0 0 12px 12px; z-index: 2; }

.lh-crystal-data-right { display: grid; gap: 9px; }
.lh-data-card {
  padding: 11px 12px; border-radius: 12px; border: 1px solid var(--border); background: var(--white);
  box-shadow: var(--shadow-sm); transition: transform .2s;
}
.lh-data-card:hover { transform: translateY(-2px); }
.lh-data-card > div:first-child { display: flex; align-items: center; gap: 7px; margin-bottom: 6px; color: var(--ice-dark); font-size: 10px; font-weight: 700; letter-spacing: .4px; }
.lh-data-card > div:first-child i { color: var(--ice); font-size: 16px; }
.lh-data-card b { display: block; font-size: 22px; color: var(--ice-deep); font-weight: 800; line-height: 1; }
.lh-data-card small { font-size: 9px; color: var(--muted-2); }
.lh-data-card.ice { background: linear-gradient(135deg, var(--ice), var(--ice-light)); border-color: var(--ice-dark); }
.lh-data-card.ice > div:first-child, .lh-data-card.ice small { color: rgba(255,255,255,.85); }
.lh-data-card.ice > div:first-child i { color: var(--white); }
.lh-data-card.ice b { color: var(--white); }

.lh-crystal-bottombar {
  padding: 11px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px;
  background: linear-gradient(180deg, transparent, rgba(14,165,233,.08)); border-top: 1px solid var(--line-soft);
  font-size: 10px; color: var(--ink); font-weight: 700;
}
.lh-crystal-bottombar > div { display: flex; align-items: center; gap: 7px; }
.lh-crystal-bottombar i { color: var(--ice); font-size: 14px; }
.lh-crystal-bottombar b { color: var(--ice-deep); font-size: 13px; }
.lh-temp-pill { padding: 5px 10px; border-radius: 99px; background: linear-gradient(135deg, #e0f2fe, #bae6fd); color: var(--ice-deep); font-weight: 800; }
.lh-crystal-rig figcaption { position: absolute; right: 18px; bottom: -27px; color: var(--muted-2); font-size: 10px; }

/* ============ 3. 数据统计条 ============ */
.lh-stat-strip {
  width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 32px 0;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft);
}
.lh-stat-item { text-align: center; position: relative; padding: 6px 10px; }
.lh-stat-item:not(:last-child)::after { content: ""; position: absolute; right: -9px; top: 18%; height: 64%; width: 1px; background: var(--line-soft); }
.lh-stat-item b { display: block; font-size: 34px; font-weight: 800; color: var(--ice-deep); line-height: 1; font-family: Arial, sans-serif; }
.lh-stat-item b em { font-size: 18px; color: var(--ice); font-style: normal; }
.lh-stat-item span { display: block; margin-top: 8px; font-size: 13px; color: var(--ink); font-weight: 700; }
.lh-stat-item small { display: block; margin-top: 2px; font-size: 10px; color: var(--muted-2); }

/* ============ 4. 软件分类横向滚动 ============ */
.lh-cat-rail { width: 100%; padding: 70px 0 64px; background: linear-gradient(180deg, transparent, var(--silver-2) 40%, transparent); }
.lh-cat-head { width: min(1240px, calc(100% - 40px)); margin: 0 auto 36px; display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 20px; }
.lh-cat-head > div > span { color: var(--ice); font: 800 11px/1 Arial, sans-serif; letter-spacing: 1.6px; }
.lh-cat-head h2 { margin: 14px 0 10px; font-size: 34px; line-height: 1.3; color: var(--ice-deep); font-weight: 800; }
.lh-cat-head p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; max-width: 540px; }
.lh-cat-head a { font-size: 13px; font-weight: 800; color: var(--ice-dark); border-bottom: 1px solid currentColor; padding-bottom: 4px; }
.lh-cat-track {
  width: 100%; padding: 6px max(20px, calc((100vw - 1240px)/2)) 10px;
  display: grid; grid-auto-flow: column; grid-auto-columns: 220px; gap: 16px; overflow-x: auto;
  scroll-snap-type: x mandatory; scrollbar-width: thin; scrollbar-color: var(--ice) var(--silver);
}
.lh-cat-track::-webkit-scrollbar { height: 6px; }
.lh-cat-track::-webkit-scrollbar-track { background: var(--silver-2); }
.lh-cat-track::-webkit-scrollbar-thumb { background: var(--ice); border-radius: 3px; }
.lh-cat-card {
  scroll-snap-align: start; padding: 26px 20px 22px; border-radius: var(--radius); border: 1px solid var(--border);
  background: linear-gradient(160deg, var(--white), var(--silver)); box-shadow: var(--shadow-sm);
  display: grid; gap: 14px; text-align: center; transition: transform .25s, box-shadow .25s, border-color .25s; position: relative; overflow: hidden;
}
.lh-cat-card::before { content: ""; position: absolute; right: -22px; top: -22px; width: 64px; height: 64px; background: radial-gradient(circle, var(--ice-soft), transparent 70%); opacity: .4; }
.lh-cat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-ice); border-color: var(--ice); }
.lh-cat-ic {
  width: 64px; height: 64px; margin: 0 auto; border-radius: 18px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--ice), var(--ice-light)); color: var(--white); font-size: 30px;
  box-shadow: 0 8px 20px rgba(14,165,233,.35); position: relative; z-index: 1;
}
.lh-cat-card h3 { font-size: 18px; color: var(--ice-deep); font-weight: 800; position: relative; z-index: 1; }
.lh-cat-card p { font-size: 12px; color: var(--muted); line-height: 1.65; position: relative; z-index: 1; }
.lh-cat-card .lh-cat-count {
  display: inline-flex; align-items: center; gap: 5px; padding: 5px 12px; margin: 0 auto;
  background: var(--silver-2); color: var(--ice-dark); border: 1px solid var(--line); border-radius: 99px;
  font-size: 11px; font-weight: 800; position: relative; z-index: 1;
}
.lh-cat-card .lh-cat-count i { font-size: 12px; }

/* ============ 5. 软件卡 3 列 ============ */
.lh-soft-grid-sec { width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 64px 0 70px; }
.lh-soft-head { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 24px; margin-bottom: 36px; }
.lh-soft-head h2 { font-size: 32px; color: var(--ice-deep); font-weight: 800; line-height: 1.3; }
.lh-soft-head > div > span { color: var(--ice); font: 800 11px/1 Arial, sans-serif; letter-spacing: 1.6px; }
.lh-soft-head > div > p { margin: 12px 0 0; color: var(--muted); font-size: 14px; max-width: 480px; line-height: 1.75; }
.lh-soft-filter { display: flex; gap: 8px; flex-wrap: wrap; }
.lh-soft-filter button {
  padding: 8px 14px; border-radius: 99px; border: 1px solid var(--line); background: var(--white);
  color: var(--ink-2); font-size: 12px; font-weight: 700; cursor: pointer; transition: all .2s;
}
.lh-soft-filter button.is-active, .lh-soft-filter button:hover {
  background: linear-gradient(135deg, var(--ice), var(--ice-light)); color: var(--white); border-color: var(--ice); box-shadow: 0 4px 12px rgba(14,165,233,.3);
}
.lh-soft-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.lh-soft-card {
  padding: 22px; border-radius: var(--radius); background: var(--white); border: 1px solid var(--border);
  box-shadow: var(--shadow-sm); display: grid; grid-template-columns: 72px 1fr; gap: 16px; align-items: start;
  transition: transform .25s, box-shadow .25s, border-color .25s; position: relative;
}
.lh-soft-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-ice); border-color: var(--ice); }
.lh-soft-ic {
  width: 72px; height: 72px; border-radius: 18px; overflow: hidden; background: var(--silver);
  display: grid; place-items: center; border: 1px solid var(--line-soft);
}
.lh-soft-ic img { width: 100%; height: 100%; object-fit: cover; }
.lh-soft-info { display: grid; gap: 6px; min-width: 0; }
.lh-soft-info h3 { font-size: 16px; color: var(--ice-deep); font-weight: 800; }
.lh-soft-meta { display: flex; align-items: center; gap: 8px; font-size: 11px; color: var(--muted); flex-wrap: wrap; }
.lh-soft-meta b { color: var(--ice-dark); font-weight: 700; }
.lh-soft-meta .lh-stars { color: var(--ice); letter-spacing: 1px; }
.lh-soft-meta .lh-stars i { color: var(--line); font-style: normal; }
.lh-soft-desc { font-size: 12px; color: var(--muted); line-height: 1.7; margin: 4px 0 10px; }
.lh-soft-dl {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; align-self: start;
  background: linear-gradient(135deg, var(--ice), var(--ice-light)); color: var(--white);
  border-radius: 10px; font-size: 12px; font-weight: 800; box-shadow: 0 4px 12px rgba(14,165,233,.3);
  transition: transform .2s, box-shadow .2s;
}
.lh-soft-dl:hover { transform: translateY(-2px); box-shadow: 0 7px 18px rgba(14,165,233,.45); color: var(--white); }
.lh-soft-tag {
  position: absolute; top: 14px; right: 14px; padding: 3px 8px; font-size: 9px; font-weight: 800; letter-spacing: .4px;
  background: var(--silver-2); color: var(--ice-dark); border: 1px solid var(--line); border-radius: 6px;
}
.lh-soft-tag.hot { background: linear-gradient(135deg, var(--ice), var(--ice-light)); color: var(--white); border-color: var(--ice-dark); }

/* ============ 6. 评论 3 列 + 冰冻指数 ============ */
.lh-voices { padding: 70px max(20px, calc((100vw - 1240px)/2)) 76px; background: linear-gradient(180deg, var(--silver), var(--silver-2)); }
.lh-voices-head { width: min(1240px, calc(100% - 40px)); margin: 0 auto 36px; display: grid; grid-template-columns: 1fr 320px; gap: 40px; align-items: end; }
.lh-voices-head > div > span { color: var(--ice); font: 800 11px/1 Arial, sans-serif; letter-spacing: 1.6px; }
.lh-voices-head h2 { margin: 14px 0 10px; font-size: 34px; line-height: 1.3; color: var(--ice-deep); font-weight: 800; }
.lh-voices-head > div > p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; max-width: 540px; }
.lh-frost-index {
  padding: 22px; border-radius: var(--radius); background: linear-gradient(160deg, var(--white), var(--silver));
  border: 1px solid var(--border); box-shadow: var(--shadow-sm); display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: center;
}
.lh-frost-score { text-align: center; }
.lh-frost-score b { display: block; font-size: 48px; font-weight: 800; color: var(--ice-deep); line-height: 1; font-family: Arial, sans-serif; }
.lh-frost-score small { display: block; font-size: 10px; color: var(--muted-2); margin-top: 6px; letter-spacing: .6px; }
.lh-frost-score .lh-stars { color: var(--ice); font-size: 14px; letter-spacing: 2px; margin-top: 4px; }
.lh-frost-bars { display: grid; gap: 7px; }
.lh-frost-bar { display: grid; grid-template-columns: 38px 1fr 30px; align-items: center; gap: 8px; font-size: 10px; color: var(--muted); font-weight: 700; }
.lh-frost-bar-track { height: 6px; border-radius: 3px; background: var(--silver-2); overflow: hidden; }
.lh-frost-bar-fill { height: 100%; background: linear-gradient(90deg, var(--ice-light), var(--ice)); border-radius: 3px; }
.lh-frost-bar b { color: var(--ice-dark); text-align: right; }

.lh-voice-grid { width: min(1240px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.lh-voice {
  padding: 22px; border-radius: var(--radius); background: var(--white); border: 1px solid var(--line-soft);
  box-shadow: var(--shadow-sm); position: relative; transition: transform .25s, box-shadow .25s;
}
.lh-voice:hover { transform: translateY(-4px); box-shadow: var(--shadow-ice); }
.lh-voice:nth-child(2), .lh-voice:nth-child(5) {
  background: linear-gradient(160deg, var(--ice), var(--ice-light)); color: var(--white); border-color: var(--ice-dark);
}
.lh-voice::before {
  content: "❄"; position: absolute; top: 12px; right: 16px; font-size: 22px; color: var(--ice-soft); opacity: .5;
}
.lh-voice:nth-child(2)::before, .lh-voice:nth-child(5)::before { color: rgba(255,255,255,.55); opacity: .7; }
.lh-voice-top { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; margin-bottom: 14px; }
.lh-voice-ava {
  width: 38px; height: 38px; border-radius: 12px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--ice), var(--ice-light)); color: var(--white); font-weight: 800; font-size: 14px;
  box-shadow: 0 4px 10px rgba(14,165,233,.3);
}
.lh-voice:nth-child(2) .lh-voice-ava, .lh-voice:nth-child(5) .lh-voice-ava { background: rgba(255,255,255,.25); }
.lh-voice-name { font-size: 13px; font-weight: 800; color: var(--ice-deep); }
.lh-voice:nth-child(2) .lh-voice-name, .lh-voice:nth-child(5) .lh-voice-name { color: var(--white); }
.lh-voice-time { font-size: 10px; color: var(--muted-2); }
.lh-voice:nth-child(2) .lh-voice-time, .lh-voice:nth-child(5) .lh-voice-time { color: rgba(255,255,255,.7); }
.lh-voice-rate { color: var(--ice); font-size: 12px; letter-spacing: 1.5px; white-space: nowrap; }
.lh-voice-rate i { color: var(--line); font-style: normal; }
.lh-voice:nth-child(2) .lh-voice-rate, .lh-voice:nth-child(5) .lh-voice-rate { color: var(--white); }
.lh-voice:nth-child(2) .lh-voice-rate i, .lh-voice:nth-child(5) .lh-voice-rate i { color: rgba(255,255,255,.4); }
.lh-voice-body { font-size: 13px; line-height: 1.85; color: var(--ink); }
.lh-voice:nth-child(2) .lh-voice-body, .lh-voice:nth-child(5) .lh-voice-body { color: rgba(255,255,255,.92); }
.lh-voice-foot { display: flex; gap: 8px; margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line-soft); flex-wrap: wrap; }
.lh-voice:nth-child(2) .lh-voice-foot, .lh-voice:nth-child(5) .lh-voice-foot { border-top-color: rgba(255,255,255,.25); }
.lh-voice-tag {
  padding: 3px 9px; font-size: 10px; font-weight: 700; border-radius: 99px;
  background: var(--silver-2); color: var(--ice-dark); border: 1px solid var(--line);
  display: inline-flex; align-items: center; gap: 4px;
}
.lh-voice:nth-child(2) .lh-voice-tag, .lh-voice:nth-child(5) .lh-voice-tag { background: rgba(255,255,255,.2); color: var(--white); border-color: rgba(255,255,255,.3); }

/* ============ 7. FAQ 手风琴单列 ============ */
.lh-faq { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 74px 0 70px; }
.lh-faq-head { text-align: center; margin-bottom: 40px; }
.lh-faq-head > span { color: var(--ice); font: 800 11px/1 Arial, sans-serif; letter-spacing: 1.6px; }
.lh-faq-head h2 { margin: 14px 0 10px; font-size: 34px; color: var(--ice-deep); font-weight: 800; line-height: 1.3; }
.lh-faq-head p { color: var(--muted); font-size: 14px; max-width: 620px; margin: 0 auto; line-height: 1.75; }
.lh-faq-list { display: grid; gap: 12px; max-width: 820px; margin: 0 auto; }
.lh-faq details {
  border: 1px solid var(--border); border-radius: var(--radius-sm); background: var(--white);
  box-shadow: var(--shadow-sm); overflow: hidden; transition: box-shadow .2s, border-color .2s;
}
.lh-faq details[open] { border-color: var(--ice); box-shadow: var(--shadow-ice); }
.lh-faq summary {
  cursor: pointer; list-style: none; display: grid; grid-template-columns: 38px 1fr auto; align-items: center;
  gap: 10px; padding: 18px 20px; font-size: 15px; font-weight: 800; color: var(--ice-deep);
}
.lh-faq summary::-webkit-details-marker { display: none; }
.lh-faq summary .lh-faq-num {
  width: 30px; height: 30px; border-radius: 9px; background: linear-gradient(135deg, var(--ice), var(--ice-light));
  color: var(--white); font: 800 12px/30px Arial, sans-serif; text-align: center; display: grid; place-items: center;
}
.lh-faq summary .lh-faq-snow { color: var(--ice-soft); font-size: 18px; transition: transform .25s, color .2s; }
.lh-faq details[open] summary .lh-faq-snow { transform: rotate(180deg); color: var(--ice); }
.lh-faq details p { margin: -4px 20px 18px 68px; color: var(--muted); font-size: 13px; line-height: 1.85; }

/* ============ 8. 冰蓝渐变 CTA 全宽 ============ */
.lh-final-cta {
  width: 100%; padding: 64px max(20px, calc((100vw - 1240px)/2)) 70px;
  background: linear-gradient(135deg, var(--ice-deep) 0%, var(--ice) 45%, var(--ice-light) 100%);
  position: relative; overflow: hidden; color: var(--white);
}
.lh-final-cta::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(2px 2px at 12% 28%, rgba(255,255,255,.5), transparent 60%),
    radial-gradient(1.5px 1.5px at 32% 72%, rgba(255,255,255,.4), transparent 60%),
    radial-gradient(2px 2px at 68% 22%, rgba(255,255,255,.5), transparent 60%),
    radial-gradient(1.5px 1.5px at 88% 68%, rgba(255,255,255,.4), transparent 60%);
  pointer-events: none;
}
.lh-final-cta-inner {
  width: min(1240px, calc(100% - 40px)); margin: 0 auto; position: relative; z-index: 1;
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 36px;
}
.lh-final-cta-svg { position: absolute; right: -40px; top: -40px; opacity: .12; pointer-events: none; }
.lh-final-copy > span { font: 800 11px/1 Arial, sans-serif; letter-spacing: 1.6px; opacity: .85; }
.lh-final-copy h2 { margin: 14px 0 12px; font-size: 34px; font-weight: 800; line-height: 1.3; }
.lh-final-copy p { margin: 0; font-size: 14px; line-height: 1.75; opacity: .9; max-width: 580px; }
.lh-final-actions { display: grid; gap: 12px; }
.lh-final-btn {
  padding: 16px 26px; border-radius: 12px; font-size: 15px; font-weight: 800; display: inline-flex; align-items: center; gap: 9px;
  transition: transform .2s, box-shadow .2s; min-width: 200px; justify-content: center;
}
.lh-final-btn.primary { background: var(--white); color: var(--ice-deep); box-shadow: 0 10px 24px rgba(8,47,73,.25); }
.lh-final-btn.primary:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(8,47,73,.35); }
.lh-final-btn.ghost { background: rgba(255,255,255,.15); color: var(--white); border: 1px solid rgba(255,255,255,.4); }
.lh-final-btn.ghost:hover { background: rgba(255,255,255,.25); transform: translateY(-3px); }
.lh-final-actions small { font-size: 11px; opacity: .8; text-align: center; }

/* ============ 9. Footer 3 列 + backtop ============ */
.lh-foot {
  width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 44px 0 36px;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px;
  border-top: 1px solid var(--line-soft);
}
.lh-foot-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.lh-foot-brand img { width: 42px; height: 42px; border-radius: 12px; box-shadow: 0 4px 12px rgba(14,165,233,.25); }
.lh-foot-brand span { display: grid; }
.lh-foot-brand b { font-size: 16px; color: var(--ice-deep); font-weight: 800; }
.lh-foot-brand small { font-size: 9px; letter-spacing: 1.4px; color: var(--ice); font-weight: 700; }
.lh-foot-about { color: var(--muted); font-size: 12px; line-height: 1.8; max-width: 420px; }
.lh-foot-col h4 { font-size: 13px; color: var(--ice-deep); font-weight: 800; margin-bottom: 14px; letter-spacing: .4px; }
.lh-foot-col ul { display: grid; gap: 9px; }
.lh-foot-col a { color: var(--ink-2); font-size: 13px; transition: color .2s; display: inline-flex; align-items: center; gap: 6px; }
.lh-foot-col a:hover { color: var(--ice); }
.lh-foot-col a i { font-size: 13px; color: var(--ice); }
.lh-foot-bottom {
  width: min(1240px, calc(100% - 40px)); margin: 0 auto; padding: 18px 0 24px;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
  border-top: 1px solid var(--line-soft); font-size: 11px; color: var(--muted);
}
.lh-foot-bottom a { color: var(--ice-dark); }
.lh-backtop {
  position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px; border: 0; border-radius: 50%;
  color: var(--white); background: linear-gradient(135deg, var(--ice), var(--ice-light));
  box-shadow: 0 8px 22px rgba(14,165,233,.4); cursor: pointer; z-index: 25;
  opacity: 0; visibility: hidden; transform: translateY(8px); transition: .25s; font-size: 18px;
}
.lh-backtop.is-visible { opacity: 1; visibility: visible; transform: none; }
.lh-backtop:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(14,165,233,.55); }

/* ============ 响应式 1080 ============ */
@media (max-width: 1080px) {
  .lh-hero { grid-template-columns: .9fr 1.1fr; gap: 28px; }
  .lh-crystal-stage { grid-template-columns: 92px 1fr 92px; }
  .lh-stat-strip { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .lh-stat-item:nth-child(2)::after { display: none; }
  .lh-soft-grid { grid-template-columns: repeat(2, 1fr); }
  .lh-voice-grid { grid-template-columns: repeat(2, 1fr); }
  .lh-voices-head { grid-template-columns: 1fr; gap: 24px; }
  .lh-final-cta-inner { grid-template-columns: 1fr; gap: 24px; }
  .lh-final-actions { grid-template-columns: 1fr 1fr; }
  .lh-foot { grid-template-columns: 1fr 1fr; }
}

/* ============ 响应式 860 ============ */
@media (max-width: 860px) {
  .lh-masthead { grid-template-columns: auto auto 1fr; gap: 12px; }
  .lh-nav-toggle { display: block; justify-self: end; grid-column: 2; grid-row: 1; }
  .lh-header-action { justify-self: end; grid-column: 3; grid-row: 1; }
  .lh-nav {
    display: none; position: absolute; left: 0; right: 0; top: calc(100% + 8px); padding: 12px;
    background: var(--white); border: 1px solid var(--line); border-radius: 12px;
    box-shadow: 0 12px 30px rgba(8,47,73,.12); flex-direction: column; gap: 4px;
  }
  .lh-nav.is-open { display: flex; }
  .lh-nav a { padding: 12px; border-bottom: 1px solid var(--line-soft); }
  .lh-nav a:last-child { border-bottom: 0; }
  .lh-hero { grid-template-columns: 1fr; padding-top: 44px; }
  .lh-hero::before { display: none; }
  .lh-crystal-rig { width: min(670px, 100%); justify-self: center; }
  .lh-crystal-chrome { transform: none; }
  .lh-crystal-stage { grid-template-columns: 80px 1fr 80px; gap: 10px; }
  .lh-cat-head { grid-template-columns: 1fr; }
  .lh-soft-head { grid-template-columns: 1fr; }
  .lh-soft-grid { grid-template-columns: 1fr; }
  .lh-voice-grid { grid-template-columns: 1fr; }
  .lh-voices-head { grid-template-columns: 1fr; }
  .lh-final-cta-inner { grid-template-columns: 1fr; }
  .lh-foot { grid-template-columns: 1fr; gap: 28px; }
  .lh-foot-bottom { flex-direction: column; align-items: flex-start; }
}

/* ============ 响应式 640 ============ */
@media (max-width: 640px) {
  .lh-masthead { width: calc(100% - 24px); height: 64px; margin-top: 10px; padding-left: 10px; grid-template-columns: minmax(0, 1fr) auto auto; gap: 8px; padding-right: 9px; }
  .lh-brandmark img { width: 40px; height: 40px; }
  .lh-brandmark { min-width: 0; gap: 8px; }
  .lh-brandmark strong { font-size: 15px; white-space: nowrap; }
  .lh-brandmark small { display: none; }
  .lh-nav-toggle { grid-column: 3; width: 36px; height: 36px; padding: 0; display: grid; place-items: center; }
  .lh-nav-toggle i { display: none; }
  .lh-nav-toggle::before { content: "☰"; font: 700 22px/1 Arial, sans-serif; }
  .lh-nav-toggle[aria-expanded="true"]::before { content: "×"; font-size: 26px; }
  .lh-header-action { grid-column: 2; grid-row: 1; padding: 9px 12px; border-radius: 9px; font-size: 0; gap: 3px; }
  .lh-header-action::before { content: "下载"; font-size: 12px; }
  .lh-header-action i { font-size: 13px; }
  .lh-hero { width: calc(100% - 28px); padding: 38px 0 42px; gap: 34px; }
  .lh-hero h1 { font-size: 36px; }
  .lh-hero-subtitle { font-size: 18px; }
  .lh-hero-intro { font-size: 14px; }
  .lh-hero-actions { gap: 14px; }
  .lh-solid-action { flex: 1; justify-content: center; padding: 14px 18px; }
  .lh-trust-strip { grid-template-columns: repeat(3, 1fr); gap: 0; }
  .lh-trust-strip li { min-width: 0; padding: 0 6px; margin: 0; display: grid; justify-items: center; text-align: center; }
  .lh-trust-strip li i { font-size: 19px; }
  .lh-crystal-stage { grid-template-columns: 1fr; gap: 14px; }
  .lh-crystal-cats-left, .lh-crystal-data-right { grid-auto-flow: column; grid-auto-columns: 1fr; grid-template-columns: none; }
  .lh-crystal-bottombar { flex-wrap: wrap; gap: 8px; justify-content: center; }
  .lh-crystal-rig figcaption { position: static; margin-top: 10px; text-align: center; }
  .lh-stat-strip { grid-template-columns: repeat(2, 1fr); gap: 18px; padding: 22px 0; }
  .lh-stat-item b { font-size: 26px; }
  .lh-stat-item::after { display: none !important; }
  .lh-cat-rail { padding: 48px 0 44px; }
  .lh-cat-head h2, .lh-soft-head h2, .lh-voices-head h2, .lh-faq-head h2, .lh-final-copy h2 { font-size: 25px; }
  .lh-soft-grid-sec { padding: 48px 0 50px; }
  .lh-soft-card { grid-template-columns: 56px 1fr; gap: 12px; padding: 18px; }
  .lh-soft-ic { width: 56px; height: 56px; }
  .lh-voices { padding: 48px 20px 52px; }
  .lh-frost-index { grid-template-columns: 1fr; gap: 14px; text-align: center; }
  .lh-frost-score { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: center; text-align: left; }
  .lh-faq { width: calc(100% - 40px); padding: 48px 0 50px; }
  .lh-faq summary { grid-template-columns: 30px 1fr auto; font-size: 14px; line-height: 1.5; padding: 16px 16px; }
  .lh-faq summary .lh-faq-num { width: 26px; height: 26px; font-size: 11px; line-height: 26px; }
  .lh-faq details p { margin: -2px 16px 16px 56px; font-size: 12px; }
  .lh-final-cta { padding: 44px 20px 48px; }
  .lh-final-actions { grid-template-columns: 1fr; }
  .lh-foot { width: calc(100% - 40px); grid-template-columns: 1fr; gap: 22px; }
  .lh-backtop { right: 14px; bottom: 14px; width: 40px; height: 40px; }
}

/* ============ 减少动画 ============ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  body::after { display: none; }
}