/* ============================================================
   中国陨石数据库 · 主题：星际矿物档案馆（暗黑玄武岩 + 青铜金）
   方向：星际矿物档案馆（深空玄武岩 + 熔壳青铜金）
   ============================================================ */

:root {
  --bg: #0B0D10;
  --bg-elev: #111419;
  --bg-elev-2: #171B21;
  --line: rgba(236, 232, 225, .08);
  --line-strong: rgba(236, 232, 225, .16);
  --text: #ECE8E1;
  --text-dim: #9AA3AC;
  --text-faint: #67707A;
  --accent: #D4A256;
  --accent-hi: #E8BE77;
  --accent-soft: rgba(212, 162, 86, .12);
  --steel: #8FA3B0;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  --maxw: 1180px;
  --ease: cubic-bezier(.16, 1, .3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 细噪点 + 星尘底纹 */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    radial-gradient(1px 1px at 18% 24%, rgba(236,232,225,.35), transparent 55%),
    radial-gradient(1px 1px at 72% 12%, rgba(236,232,225,.22), transparent 55%),
    radial-gradient(1.5px 1.5px at 46% 68%, rgba(212,162,86,.20), transparent 55%),
    radial-gradient(1px 1px at 88% 52%, rgba(236,232,225,.18), transparent 55%),
    radial-gradient(1px 1px at 8% 82%, rgba(236,232,225,.14), transparent 55%),
    radial-gradient(1200px 700px at 82% -10%, rgba(212,162,86,.05), transparent 60%);
  opacity: .8;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
::selection { background: rgba(212,162,86,.35); }

.wrap { width: min(var(--maxw), 90vw); margin: 0 auto; position: relative; z-index: 1; }

/* ---------------- 导航 ---------------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(11, 13, 16, .72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: background .4s var(--ease);
}
.nav-inner {
  width: min(1320px, 94vw); margin: 0 auto;
  display: flex; align-items: center; gap: 28px; height: 66px;
}
.brand { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #3A3F47, #14171B 62%);
  border: 1px solid var(--line-strong);
  position: relative;
  box-shadow: inset -4px -6px 12px rgba(0,0,0,.7), inset 3px 4px 8px rgba(236,232,225,.06);
}
.brand-mark::after {
  content: ""; position: absolute; right: 6px; top: 7px;
  width: 7px; height: 7px; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #F2D9A6, var(--accent) 60%, #7A5A24);
  box-shadow: 0 0 10px rgba(212,162,86,.55);
}
.brand-name { font-family: var(--serif); font-weight: 700; font-size: 19px; letter-spacing: .06em; }
.brand-name em { font-style: normal; color: var(--accent); }
.brand-sub {
  font-size: 9.5px; letter-spacing: .3em; color: var(--text-faint);
  text-transform: uppercase; margin-top: 1px;
}
.nav-links { display: flex; gap: 4px; margin-left: auto; align-items: center; }
.nav-links a {
  font-size: 14.5px; color: var(--text-dim); padding: 8px 13px;
  border-radius: 3px; position: relative; letter-spacing: .04em;
  transition: color .25s;
  white-space: nowrap;
}
.nav-links a::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 3px;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: left; transition: transform .35s var(--ease);
}
.nav-links a:hover, .nav-links a.on { color: var(--text); }
.nav-links a:hover::after, .nav-links a.on::after { transform: scaleX(1); }
.nav-links a.on { color: var(--accent-hi); }
.nav-burger { display: none; }

/* ---------------- Hero ---------------- */
.hero {
  position: relative; min-height: 92vh; display: flex; align-items: center;
  padding: 140px 0 90px; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
}
.hero-bg img {
  width: 100%; height: 100%; object-fit: cover; object-position: 62% 40%;
  opacity: .85;
}
.hero-bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(11,13,16,.96) 0%, rgba(11,13,16,.82) 34%, rgba(11,13,16,.25) 72%, rgba(11,13,16,.55) 100%),
    linear-gradient(0deg, var(--bg) 0%, transparent 30%);
}
.hero-inner { position: relative; z-index: 2; max-width: 640px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 12px;
  font-size: 11.5px; letter-spacing: .34em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 26px;
}
.eyebrow::before { content: ""; width: 34px; height: 1px; background: var(--accent); opacity: .8; }
h1.hero-title {
  font-family: var(--serif); font-weight: 900;
  font-size: clamp(46px, 6.4vw, 84px); line-height: 1.14; letter-spacing: .02em;
}
h1.hero-title .gold { color: var(--accent-hi); }
.hero-lede {
  margin-top: 26px; color: var(--text-dim); font-size: 17px; max-width: 520px;
  line-height: 1.9;
}
.hero-cta { margin-top: 44px; display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 30px; font-size: 15px; letter-spacing: .08em;
  border: 1px solid var(--line-strong); border-radius: 2px;
  color: var(--text); position: relative; overflow: hidden;
  transition: all .35s var(--ease); cursor: pointer; background: transparent;
}
.btn::before {
  content: ""; position: absolute; inset: 0; background: var(--accent);
  transform: translateY(101%); transition: transform .4s var(--ease); z-index: -1;
}
.btn:hover { color: #14100A; border-color: var(--accent); }
.btn:hover::before { transform: translateY(0); }
.btn.primary { background: var(--accent); color: #14100A; border-color: var(--accent); font-weight: 600; }
.btn.primary::before { background: var(--accent-hi); }
.btn .arr { transition: transform .35s var(--ease); }
.btn:hover .arr { transform: translateX(4px); }

/* hero 底部关键字带 */
.hero-strip {
  position: absolute; left: 0; right: 0; bottom: 0; z-index: 3;
  border-top: 1px solid var(--line);
  background: rgba(11,13,16,.5); backdrop-filter: blur(8px);
}
.hero-strip-in {
  width: min(1320px, 94vw); margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr);
}
.hero-strip .cell {
  padding: 20px 8px 22px; border-left: 1px solid var(--line);
  padding-left: 24px;
}
.hero-strip .cell:first-child { border-left: none; padding-left: 0; }
.hero-strip .k {
  font-family: var(--serif); font-size: 17px; color: var(--text); letter-spacing: .05em;
}
.hero-strip .v {
  font-size: 10.5px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--text-faint); margin-top: 3px;
}
.hero-strip .num { color: var(--accent); font-family: var(--serif); }

/* ---------------- 区块通用 ---------------- */
section.sec { padding: 110px 0; position: relative; }
.sec-head { display: flex; align-items: flex-end; gap: 28px; margin-bottom: 56px; }
.sec-no {
  font-family: var(--serif); font-size: 13px; color: var(--accent);
  letter-spacing: .28em; writing-mode: vertical-rl; padding-bottom: 6px;
  border-left: 1px solid var(--line-strong); padding-left: 14px; height: 58px;
}
.sec-titles h2 {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(28px, 3.4vw, 42px); letter-spacing: .03em; line-height: 1.25;
}
.sec-titles .en {
  font-size: 11px; letter-spacing: .3em; text-transform: uppercase;
  color: var(--text-faint); margin-top: 10px;
}
.sec-head .more {
  margin-left: auto; font-size: 13.5px; color: var(--text-dim);
  letter-spacing: .1em; padding-bottom: 8px; white-space: nowrap;
  transition: color .25s;
}
.sec-head .more:hover { color: var(--accent-hi); }
.sec-head .more i { font-style: normal; color: var(--accent); margin-left: 6px; }

.hairline { height: 1px; background: var(--line); margin: 0; }

/* ---------------- 标本卡 ---------------- */
.spec-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px;
}
.spec-card {
  position: relative; background: var(--bg-elev);
  border: 1px solid var(--line); overflow: hidden;
  transition: transform .5s var(--ease), border-color .4s, box-shadow .5s var(--ease);
}
.spec-card:hover {
  transform: translateY(-6px);
  border-color: rgba(212,162,86,.45);
  box-shadow: 0 24px 60px -24px rgba(0,0,0,.85);
}
.spec-card .ph { position: relative; aspect-ratio: 1 / .86; overflow: hidden; }
.spec-card .ph img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .9s var(--ease), opacity .5s;
  filter: saturate(.94);
}
.spec-card:hover .ph img { transform: scale(1.055); }
.spec-card .tag {
  position: absolute; top: 14px; left: 14px; z-index: 2;
  font-size: 11px; letter-spacing: .16em; color: var(--accent-hi);
  background: rgba(11,13,16,.78); border: 1px solid rgba(212,162,86,.4);
  padding: 5px 11px; backdrop-filter: blur(6px);
}
.spec-card .cat {
  position: absolute; top: 14px; right: 14px; z-index: 2;
  font-size: 10.5px; letter-spacing: .2em; color: var(--text-dim);
  background: rgba(11,13,16,.7); padding: 5px 10px; backdrop-filter: blur(6px);
}
.spec-card .bd { padding: 22px 22px 26px; }
.spec-card h3 {
  font-family: var(--serif); font-size: 21px; font-weight: 700; letter-spacing: .04em;
}
.spec-card h3 span { color: var(--text-faint); font-size: 13px; font-family: var(--sans); font-weight: 400; margin-left: 8px; letter-spacing: .1em; }
.spec-card p {
  color: var(--text-dim); font-size: 13.8px; margin-top: 10px; line-height: 1.8;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.spec-card .meta {
  margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line);
  display: flex; gap: 20px; font-size: 12px; color: var(--text-faint); letter-spacing: .05em;
}
.spec-card .meta b { color: var(--text-dim); font-weight: 500; }

/* ---------------- 文章列表 ---------------- */
.art-list { border-top: 1px solid var(--line); }
.art-item {
  display: grid; grid-template-columns: 96px 1fr auto; gap: 30px;
  padding: 34px 6px; border-bottom: 1px solid var(--line);
  align-items: baseline; position: relative; transition: background .3s;
}
.art-item:hover { background: rgba(236,232,225,.025); }
.art-item .no {
  font-family: var(--serif); color: var(--text-faint); font-size: 15px; letter-spacing: .1em;
}
.art-item:hover .no { color: var(--accent); }
.art-item h3 {
  font-family: var(--serif); font-size: 22px; font-weight: 600; letter-spacing: .03em;
  transition: color .25s;
}
.art-item:hover h3 { color: var(--accent-hi); }
.art-item .ex {
  color: var(--text-dim); font-size: 14px; margin-top: 8px; max-width: 720px;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden;
}
.art-item .dt { color: var(--text-faint); font-size: 13px; letter-spacing: .08em; white-space: nowrap; }
.art-item .go {
  position: absolute; right: 6px; bottom: 26px; font-size: 12px; color: var(--accent);
  opacity: 0; transform: translateX(-8px); transition: all .35s var(--ease); letter-spacing: .12em;
}
.art-item:hover .go { opacity: 1; transform: translateX(0); }

/* ---------------- 引言 / 编辑部区块 ---------------- */
.quote-sec { display: grid; grid-template-columns: 1.05fr .95fr; gap: 70px; align-items: center; }
.quote-sec .big {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(26px, 2.9vw, 38px); line-height: 1.6; letter-spacing: .02em;
}
.quote-sec .big em { font-style: normal; color: var(--accent-hi); }
.quote-sec .txt { margin-top: 26px; color: var(--text-dim); font-size: 15.5px; line-height: 2; }
.quote-sec .fr { margin-top: 30px; display: flex; gap: 26px; }
.quote-sec .fr .it { border-left: 2px solid var(--accent); padding-left: 16px; }
.quote-sec .fr .it b { font-family: var(--serif); font-size: 26px; font-weight: 700; color: var(--text); display: block; }
.quote-sec .fr .it span { font-size: 12px; color: var(--text-faint); letter-spacing: .14em; }
.quote-sec .imgbox { position: relative; }
.quote-sec .imgbox img { width: 100%; border: 1px solid var(--line-strong); }
.quote-sec .imgbox::after {
  content: ""; position: absolute; inset: 16px -16px -16px 16px;
  border: 1px solid rgba(212,162,86,.35); z-index: -1;
}

/* ---------------- 藏品带 ---------------- */
.duo { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
.duo-panel { position: relative; overflow: hidden; border: 1px solid var(--line); min-height: 460px; display: flex; }
.duo-panel .bg { position: absolute; inset: 0; }
.duo-panel .bg img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.1s var(--ease); filter: saturate(.9); }
.duo-panel:hover .bg img { transform: scale(1.05); }
.duo-panel .bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,13,16,.15) 0%, rgba(11,13,16,.88) 78%);
}
.duo-panel .cap { position: relative; z-index: 2; margin-top: auto; padding: 34px; width: 100%; }
.duo-panel .cap .en { font-size: 10.5px; letter-spacing: .3em; text-transform: uppercase; color: var(--accent); }
.duo-panel .cap h3 { font-family: var(--serif); font-size: 30px; font-weight: 700; margin-top: 10px; letter-spacing: .05em; }
.duo-panel .cap p { color: var(--text-dim); font-size: 14px; margin-top: 10px; max-width: 400px; }
.duo-panel .cap .lnk {
  display: inline-flex; align-items: center; gap: 8px; margin-top: 20px;
  font-size: 13.5px; letter-spacing: .12em; color: var(--accent-hi);
}

/* ---------------- 视频卡 ---------------- */
.vid-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.vid-card { position: relative; border: 1px solid var(--line); overflow: hidden; background: var(--bg-elev); }
.vid-card .ph { aspect-ratio: 16/10; overflow: hidden; position: relative; }
.vid-card .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); filter: saturate(.9); }
.vid-card:hover .ph img { transform: scale(1.05); }
.vid-card .play {
  position: absolute; inset: 0; margin: auto; width: 62px; height: 62px;
  border-radius: 50%; border: 1px solid rgba(236,232,225,.5);
  background: rgba(11,13,16,.45); backdrop-filter: blur(4px);
  display: flex; align-items: center; justify-content: center;
  transition: all .35s var(--ease);
}
.vid-card:hover .play { border-color: var(--accent); background: rgba(212,162,86,.22); transform: scale(1.08); }
.vid-card .play::after {
  content: ""; width: 0; height: 0; margin-left: 4px;
  border-left: 14px solid var(--text); border-top: 9px solid transparent; border-bottom: 9px solid transparent;
}
.vid-card:hover .play::after { border-left-color: var(--accent-hi); }
.vid-card .bd { padding: 18px 20px 22px; }
.vid-card h3 { font-family: var(--serif); font-size: 17.5px; font-weight: 600; letter-spacing: .03em; }
.vid-card p { color: var(--text-faint); font-size: 12.5px; margin-top: 6px; letter-spacing: .06em; }
.vid-card .soon {
  position: absolute; top: 14px; right: 14px; font-size: 10.5px; letter-spacing: .2em;
  color: var(--text-dim); background: rgba(11,13,16,.75); padding: 5px 10px;
  border: 1px solid var(--line-strong); backdrop-filter: blur(6px);
}

/* ---------------- CTA ---------------- */
.cta-band { position: relative; padding: 130px 0; overflow: hidden; text-align: center; }
.cta-band .bg { position: absolute; inset: 0; }
.cta-band .bg img { width: 100%; height: 100%; object-fit: cover; opacity: .5; }
.cta-band .bg::after { content: ""; position: absolute; inset: 0;
  background: radial-gradient(900px 500px at 50% 50%, rgba(11,13,16,.55), rgba(11,13,16,.94)); }
.cta-band .in { position: relative; z-index: 2; }
.cta-band h2 { font-family: var(--serif); font-size: clamp(30px, 4vw, 48px); font-weight: 900; letter-spacing: .06em; }
.cta-band p { color: var(--text-dim); margin-top: 18px; font-size: 16px; letter-spacing: .06em; }
.cta-band .btns { margin-top: 40px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ---------------- 页脚 ---------------- */
footer { border-top: 1px solid var(--line); padding: 72px 0 40px; background: #08090C; position: relative; z-index: 1; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 48px; }
.foot-grid h4 {
  font-size: 12px; letter-spacing: .26em; color: var(--text-faint);
  text-transform: uppercase; margin-bottom: 22px;
}
.foot-grid .about p { color: var(--text-dim); font-size: 13.8px; line-height: 2; max-width: 300px; }
.foot-grid ul { list-style: none; }
.foot-grid li { margin-bottom: 12px; }
.foot-grid li a { color: var(--text-dim); font-size: 14px; transition: color .25s; }
.foot-grid li a:hover { color: var(--accent-hi); }
.foot-brand { font-family: var(--serif); font-size: 24px; font-weight: 700; }
.foot-brand em { font-style: normal; color: var(--accent); }
.foot-sub { font-size: 10px; letter-spacing: .3em; color: var(--text-faint); margin-top: 6px; text-transform: uppercase; }
.foot-contact li { color: var(--text-dim); font-size: 14px; display: flex; gap: 10px; }
.foot-contact b { color: var(--text-faint); font-weight: 400; flex-shrink: 0; }
.foot-bottom {
  margin-top: 64px; padding-top: 26px; border-top: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  color: var(--text-faint); font-size: 12.5px; letter-spacing: .06em;
}

/* ---------------- 内页头 ---------------- */
.page-hero {
  padding: 170px 0 72px; position: relative; overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.page-hero .crumb { font-size: 12px; letter-spacing: .18em; color: var(--text-faint); margin-bottom: 20px; text-transform: uppercase; }
.page-hero .crumb a { color: var(--text-dim); }
.page-hero .crumb a:hover { color: var(--accent-hi); }
.page-hero h1 { font-family: var(--serif); font-weight: 900; font-size: clamp(34px, 4.6vw, 56px); letter-spacing: .04em; }
.page-hero .en { font-size: 11.5px; letter-spacing: .32em; color: var(--accent); text-transform: uppercase; margin-top: 16px; }
.page-hero .desc { color: var(--text-dim); margin-top: 20px; max-width: 620px; font-size: 15.5px; }

/* 卡片网格页 */
.grid-page { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.mini-card {
  background: var(--bg-elev); border: 1px solid var(--line); overflow: hidden;
  transition: transform .45s var(--ease), border-color .35s;
}
.mini-card:hover { transform: translateY(-5px); border-color: rgba(212,162,86,.4); }
.mini-card .ph { aspect-ratio: 1/.92; overflow: hidden; }
.mini-card .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.mini-card:hover .ph img { transform: scale(1.05); }
.mini-card .bd { padding: 18px 18px 20px; }
.mini-card h3 { font-family: var(--serif); font-size: 17px; font-weight: 600; letter-spacing: .04em; }
.mini-card p { color: var(--text-faint); font-size: 12.5px; margin-top: 6px; }
.mini-card .no { font-size: 10.5px; letter-spacing: .2em; color: var(--accent); margin-bottom: 8px; }

/* ---------------- 文章详情 ---------------- */
.article { max-width: 780px; margin: 0 auto; }
.article .head { padding: 60px 0 40px; border-bottom: 1px solid var(--line); }
.article h1 { font-family: var(--serif); font-size: clamp(28px, 3.6vw, 40px); font-weight: 700; line-height: 1.45; letter-spacing: .02em; }
.article .info { margin-top: 22px; display: flex; gap: 26px; color: var(--text-faint); font-size: 13px; letter-spacing: .1em; }
.article .body { padding: 46px 0 30px; }
.article .body p { font-size: 16.5px; line-height: 2.15; color: #D6D2CB; margin-bottom: 26px; letter-spacing: .015em; }
.article .body p:first-letter { }
.article .body .drop::first-letter {
  font-family: var(--serif); font-size: 3.1em; float: left; line-height: 1;
  padding: 6px 14px 0 0; color: var(--accent-hi);
}
.article .body img { margin: 34px 0; border: 1px solid var(--line-strong); }
.article .note {
  margin: 40px 0; padding: 22px 26px; border-left: 2px solid var(--accent);
  background: var(--accent-soft); font-size: 14.5px; color: var(--text-dim); line-height: 1.9;
}
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 30px; }
.pager a {
  border: 1px solid var(--line); padding: 20px 24px; color: var(--text-dim);
  font-size: 14px; transition: all .3s; line-height: 1.7;
}
.pager a:hover { border-color: rgba(212,162,86,.4); color: var(--text); }
.pager a span { display: block; font-size: 11px; letter-spacing: .2em; color: var(--text-faint); margin-bottom: 8px; }
.pager a.next { text-align: right; }

/* ---------------- 标本详情 ---------------- */
.spec-detail { display: grid; grid-template-columns: 1.15fr .85fr; gap: 60px; align-items: start; }
.spec-detail .imgbox { border: 1px solid var(--line-strong); position: relative; }
.spec-detail .imgbox img { width: 100%; }
.spec-detail .imgbox .tag {
  position: absolute; top: 16px; left: 16px; font-size: 11px; letter-spacing: .18em;
  color: var(--accent-hi); background: rgba(11,13,16,.8); border: 1px solid rgba(212,162,86,.4);
  padding: 6px 12px; backdrop-filter: blur(6px);
}
.spec-detail h1 { font-family: var(--serif); font-size: clamp(30px, 3.4vw, 42px); font-weight: 700; letter-spacing: .04em; }
.spec-detail .sub { color: var(--text-faint); font-size: 12px; letter-spacing: .28em; text-transform: uppercase; margin-top: 12px; }
.spec-detail .desc { color: var(--text-dim); font-size: 15.5px; line-height: 2.05; margin-top: 28px; }
.data-sheet { margin-top: 36px; border-top: 1px solid var(--line-strong); }
.data-sheet .row {
  display: grid; grid-template-columns: 130px 1fr; padding: 15px 2px;
  border-bottom: 1px solid var(--line); font-size: 14.5px;
}
.data-sheet .row b { color: var(--text-faint); font-weight: 400; letter-spacing: .1em; font-size: 13px; padding-top: 1px; }
.data-sheet .row span { color: var(--text); }
.spec-thumbs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 20px; }
.spec-thumbs img { border: 1px solid var(--line); aspect-ratio: 1; object-fit: cover; width: 100%; transition: border-color .3s; }
.spec-thumbs img:hover { border-color: var(--accent); }

/* ---------------- 留言 ---------------- */
.contact-wrap { display: grid; grid-template-columns: 1fr 1.2fr; gap: 70px; }
.c-item { padding: 26px 0; border-bottom: 1px solid var(--line); }
.c-item .k { font-size: 11.5px; letter-spacing: .26em; color: var(--text-faint); text-transform: uppercase; }
.c-item .v { font-family: var(--serif); font-size: 21px; margin-top: 10px; letter-spacing: .04em; }
.c-item .tip { color: var(--text-dim); font-size: 13.5px; margin-top: 6px; }
.form { background: var(--bg-elev); border: 1px solid var(--line); padding: 40px; }
.form .fr { margin-bottom: 24px; }
.form label { display: block; font-size: 12.5px; letter-spacing: .18em; color: var(--text-faint); margin-bottom: 10px; text-transform: uppercase; }
.form input, .form textarea, .form select {
  width: 100%; background: var(--bg); border: 1px solid var(--line-strong);
  color: var(--text); padding: 13px 16px; font-size: 15px; font-family: var(--sans);
  transition: border-color .3s; border-radius: 2px;
}
.form input:focus, .form textarea:focus { outline: none; border-color: var(--accent); }
.form textarea { min-height: 130px; resize: vertical; }
.form .tip2 { font-size: 12.5px; color: var(--text-faint); margin-top: 18px; line-height: 1.8; }

/* ---------------- 动效 ---------------- */
.rv { opacity: 0; transform: translateY(28px); transition: opacity .9s var(--ease), transform .9s var(--ease); }
.rv.in { opacity: 1; transform: none; }
.rv.d1 { transition-delay: .1s; } .rv.d2 { transition-delay: .2s; }
.rv.d3 { transition-delay: .3s; } .rv.d4 { transition-delay: .4s; }

@media (prefers-reduced-motion: reduce) {
  .rv { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 1080px) {
  .spec-grid, .vid-grid { grid-template-columns: repeat(2, 1fr); }
  .grid-page { grid-template-columns: repeat(3, 1fr); }
  .nav-links { display: none; }
  .nav-burger {
    display: flex; flex-direction: column; gap: 5px; margin-left: auto;
    padding: 10px; cursor: pointer;
  }
  .nav-burger i { width: 22px; height: 1.5px; background: var(--text); display: block; transition: .3s; }
  .nav.open .nav-links {
    display: flex; flex-direction: column; position: absolute; top: 66px; left: 0; right: 0;
    background: rgba(11,13,16,.97); border-bottom: 1px solid var(--line);
    padding: 18px 6vw 26px; gap: 2px; backdrop-filter: blur(16px);
  }
  .nav.open .nav-links a { padding: 12px 0; font-size: 16px; }
  .quote-sec, .contact-wrap, .spec-detail { grid-template-columns: 1fr; gap: 44px; }
  .duo { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .hero { padding-bottom: 250px; min-height: auto; }
  .hero-strip-in { grid-template-columns: 1fr 1fr; }
  .hero-strip .k { font-size: 14.5px; }
  .hero-strip .cell:nth-child(3) { border-left: none; padding-left: 0; border-top: 1px solid var(--line); }
  .hero-strip .cell:nth-child(4) { border-top: 1px solid var(--line); }
  .spec-grid, .vid-grid, .grid-page { grid-template-columns: 1fr; }
  .art-item { grid-template-columns: 1fr; gap: 8px; }
  .art-item .dt { order: -1; }
  .foot-grid { grid-template-columns: 1fr; }
  section.sec { padding: 78px 0; }
  .form { padding: 26px; }
  .pager { grid-template-columns: 1fr; }
}

/* ---- 联系方式 ---- */
.foot-qr { margin-top: 10px; }
.foot-qr img {
  width: 92px; height: auto; display: block;
  border-radius: 8px; border: 1px solid var(--line);
  background: #fff; padding: 4px;
}
.qr-card {
  margin-top: 26px; padding: 22px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); text-align: center;
}
.qr-card img {
  width: 168px; height: auto; display: block; margin: 0 auto 14px;
  background: #fff; padding: 8px; border-radius: 10px;
}
.qr-name { font-size: 15px; color: var(--text); margin-bottom: 4px; }
.qr-tip { font-size: 13px; color: var(--text-faint); margin-bottom: 8px; }
.qr-phone { font-size: 14px; color: var(--text-dim); }

/* ---- 悬浮联系按钮 ---- */
.c-float {
  position: fixed; right: 22px; bottom: 26px; z-index: 90;
  display: flex; flex-direction: column; gap: 10px;
}
.cf-btn {
  width: 52px; height: 52px; border-radius: 50%;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 1px; cursor: pointer; text-decoration: none;
  border: 1px solid var(--line);
  background: var(--panel); color: var(--text-dim);
  box-shadow: 0 6px 24px rgba(0,0,0,.45);
  transition: color .2s, border-color .2s, transform .2s;
}
.cf-btn i { font-style: normal; font-size: 10px; line-height: 1; }
.cf-btn:hover { color: var(--gold); border-color: var(--gold); transform: translateY(-2px); }
.cf-pop {
  position: absolute; right: 62px; bottom: 0;
  width: 196px; padding: 14px;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; text-align: center;
  box-shadow: 0 12px 40px rgba(0,0,0,.5);
  opacity: 0; visibility: hidden; transform: translateY(6px);
  transition: all .22s ease;
}
.cf-pop img {
  width: 100%; display: block; margin-bottom: 10px;
  background: #fff; padding: 6px; border-radius: 8px;
}
.cf-pop b { display: block; font-size: 13px; color: var(--text); margin-bottom: 2px; }
.cf-pop span { font-size: 12px; color: var(--text-faint); }
.c-float.show .cf-pop, .cf-wx:hover + .cf-pop { opacity: 1; visibility: visible; transform: translateY(0); }

@media (max-width: 720px) {
  .c-float { right: 14px; bottom: 18px; }
  .cf-btn { width: 46px; height: 46px; }
  .cf-pop { width: 172px; right: 54px; }
}
.brand-logo { height: 42px; width: auto; max-width: 180px; object-fit: contain; display: block; }

/* 变量别名（组件兼容层） */
:root { --gold: var(--accent); --panel: var(--bg-elev); --radius: 2px; }
.nav.scrolled { background: rgba(11, 13, 16, .92); }