/* =========================================================
   敦茂新材料 · 单页面官网改版（ALD 前驱体官网设计稿迁移）
   表现层：现代高科技风格（深空蓝 + 青蓝点缀 + 留白内容区）
   来源：Kimi_Agent_ALD前驱体官网改版/app/assets/css/style.css
   用途：domole 首页 home_v2.html 专用（全量引入）
   ========================================================= */

:root {
  --navy-900: #060d1a;
  --navy-800: #0a1730;
  --navy-700: #10224a;
  --ink: #16213a;
  --ink-soft: #44506b;
  --line: #e3e8f2;
  --bg: #ffffff;
  --bg-tint: #f3f6fb;
  --accent: #2f7cf6;
  --accent-2: #22d3ee;
  --accent-soft: rgba(47, 124, 246, 0.12);
  --radius: 14px;
  --shadow: 0 18px 40px -18px rgba(10, 23, 48, 0.25);
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Consolas, "Courier New", monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

.container { width: min(1180px, 92%); margin-inline: auto; }

/* ---------------- 导航 ---------------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .35s ease, box-shadow .35s ease, backdrop-filter .35s ease;
}
.site-header.is-scrolled {
  background: rgba(6, 13, 26, 0.86);
  backdrop-filter: blur(14px);
  box-shadow: 0 8px 30px -12px rgba(0, 0, 0, 0.5);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; }

.brand { display: flex; align-items: center; gap: 12px; color: #fff; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 10px;
  display: grid; place-items: center;
  font-weight: 800; letter-spacing: .5px; font-size: 15px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff; box-shadow: 0 6px 18px -6px rgba(47, 124, 246, .7);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.25; }
.brand-text strong { font-size: 17px; letter-spacing: 2px; }
.brand-text small { font-size: 10.5px; opacity: .65; letter-spacing: 1.2px; text-transform: uppercase; }

.site-nav { display: flex; align-items: center; gap: 6px; }
.site-nav a {
  color: rgba(255, 255, 255, .82); font-size: 14.5px;
  padding: 8px 14px; border-radius: 8px;
  transition: color .25s, background .25s;
}
.site-nav a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
.site-nav a.nav-cta {
  margin-left: 8px; color: #fff;
  background: linear-gradient(135deg, var(--accent), #1f5fd0);
  box-shadow: 0 8px 20px -8px rgba(47, 124, 246, .8);
}
.site-nav a.nav-cta:hover { filter: brightness(1.1); }

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 10px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: #fff; margin: 5px 0; transition: .3s; }

/* ---------------- 首屏 ---------------- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  color: #fff; overflow: hidden;
  background: var(--navy-900);
}
.hero-bg {
  position: absolute; inset: 0;
  background: url("../images/ald/qianquti.png") right center / cover no-repeat;
  transform: scale(1.05);
  animation: heroDrift 24s ease-in-out infinite alternate;
}
@keyframes heroDrift { from { transform: scale(1.05) translateX(0); } to { transform: scale(1.12) translateX(-2.5%); } }
.hero-overlay {
  position: absolute; inset: 0;
  background:
    radial-gradient(1000px 500px at 78% 30%, rgba(34, 211, 238, .14), transparent 60%),
    linear-gradient(100deg, rgba(6, 13, 26, .97) 30%, rgba(6, 13, 26, .78) 55%, rgba(6, 13, 26, .35) 100%);
}
.hero-content { position: relative; padding: 140px 0 90px; }

.hero-eyebrow {
  font-size: 13px; letter-spacing: 5px; color: var(--accent-2);
  text-transform: uppercase; margin-bottom: 18px; font-weight: 600;
}
.hero h1 { font-size: clamp(30px, 4.6vw, 54px); line-height: 1.3; font-weight: 800; letter-spacing: 1px; }
.hero h1 em {
  font-style: normal;
  background: linear-gradient(90deg, var(--accent-2), #7dd3fc, var(--accent));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { max-width: 640px; margin-top: 22px; color: rgba(255, 255, 255, .78); font-size: 16.5px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.btn {
  display: inline-block; padding: 13px 30px; border-radius: 10px;
  font-size: 15px; font-weight: 600; letter-spacing: 1px;
  transition: transform .25s, box-shadow .25s, background .25s, border-color .25s;
}
.btn-primary {
  color: #fff; background: linear-gradient(135deg, var(--accent), #1f5fd0);
  box-shadow: 0 14px 30px -10px rgba(47, 124, 246, .75);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 36px -10px rgba(47, 124, 246, .9); }
.btn-ghost { color: #fff; border: 1px solid rgba(255, 255, 255, .35); }
.btn-ghost:hover { border-color: var(--accent-2); color: var(--accent-2); transform: translateY(-2px); }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  margin-top: 64px; padding-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, .14);
  max-width: 860px;
}
.hero-stats dt {
  font-size: clamp(22px, 2.6vw, 32px); font-weight: 800;
  background: linear-gradient(90deg, #fff, #9fd8ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-stats dd { font-size: 13px; color: rgba(255, 255, 255, .6); margin-top: 4px; letter-spacing: .5px; }

/* ---------------- 通用板块 ---------------- */
.section { padding: 96px 0; }
.section-tint { background: var(--bg-tint); }
.section-dark { background: linear-gradient(180deg, var(--navy-800), var(--navy-900)); color: #eef3fb; }

.section-head { max-width: 760px; margin-bottom: 48px; }
.section-eyebrow {
  font-size: 12.5px; letter-spacing: 4px; font-weight: 700;
  color: var(--accent); text-transform: uppercase; margin-bottom: 12px;
}
.section-dark .section-eyebrow { color: var(--accent-2); }
.section-head h2 { font-size: clamp(26px, 3.2vw, 38px); font-weight: 800; letter-spacing: 1px; line-height: 1.35; }
.section-lead { margin-top: 16px; color: var(--ink-soft); font-size: 16px; }
.section-dark .section-lead { color: rgba(238, 243, 251, .7); }

.sub-head {
  font-size: 20px; font-weight: 700; margin: 44px 0 14px;
  padding-left: 14px; border-left: 4px solid var(--accent);
  letter-spacing: .5px;
}
.section-dark .sub-head { border-left-color: var(--accent-2); }
.sub-head:first-of-type { margin-top: 8px; }
.sub-lead { color: var(--ink-soft); max-width: 820px; margin-bottom: 26px; font-size: 15.5px; }
.section-dark .sub-lead { color: rgba(238, 243, 251, .68); }

/* 简介图文 */
.prose-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; }
.prose p { margin-bottom: 16px; color: var(--ink-soft); font-size: 16px; }
.prose p strong { color: var(--accent); }
.section-dark .prose p { color: rgba(238, 243, 251, .78); }

.keypoints { display: grid; gap: 14px; }
.keypoints li {
  background: var(--bg-tint); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px 22px;
  display: flex; flex-direction: column; gap: 4px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}
.keypoints li:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: rgba(47, 124, 246, .4); }
.keypoints strong { font-size: 15.5px; color: var(--ink); }
.keypoints span { font-size: 13.5px; color: var(--ink-soft); }

/* 应用卡片 */
.card-grid { display: grid; gap: 24px; margin-top: 8px; }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }

.app-card {
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius); overflow: hidden;
  transition: transform .35s, border-color .35s, box-shadow .35s;
}
.app-card:hover { transform: translateY(-6px); border-color: rgba(34, 211, 238, .45); box-shadow: 0 24px 50px -20px rgba(0, 0, 0, .55); }
.app-card img { width: 100%; aspect-ratio: 16 / 8.5; object-fit: contain; background: #fff; }
.app-card figcaption { padding: 20px 22px 24px; }
.app-card h4 { font-size: 17px; margin-bottom: 8px; color: #fff; }
.app-card p { font-size: 13.5px; color: rgba(238, 243, 251, .66); line-height: 1.7; }

.mini-spec { display: grid; gap: 8px; }
.mini-spec div { display: flex; gap: 10px; font-size: 13.5px; }
.mini-spec dt {
  flex: none; min-width: 40px; color: var(--accent-2);
  font-weight: 700; font-size: 13px;
}
.mini-spec dd { color: rgba(238, 243, 251, .7); }

.feature-band {
  display: grid; grid-template-columns: 1fr 1.1fr; gap: 36px; align-items: center;
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .1);
  border-radius: var(--radius); padding: 28px; margin-top: 8px;
}
.feature-band img { border-radius: 10px; }
.feature-band p { color: rgba(238, 243, 251, .78); font-size: 15.5px; }

/* 产品特点卡片 */
.feature-grid { margin-top: 4px; }
.feature-card {
  position: relative; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 28px 26px;
  transition: transform .3s, box-shadow .3s, border-color .3s;
  overflow: hidden;
}
.feature-card::before {
  content: ""; position: absolute; inset: 0 auto 0 0; width: 4px;
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  opacity: 0; transition: opacity .3s;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: rgba(47, 124, 246, .35); }
.feature-card:hover::before { opacity: 1; }
.feature-card h4 { font-size: 17px; margin-bottom: 10px; color: var(--ink); }
.feature-card p { font-size: 14px; color: var(--ink-soft); }

/* 源瓶画廊 */
.vessel-gallery { margin-top: 64px; }
.gallery-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.gallery-row img {
  width: 100%; aspect-ratio: 1 / 1.05; object-fit: contain;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 14px; transition: transform .3s, box-shadow .3s;
}
.gallery-row img:hover { transform: translateY(-5px); box-shadow: var(--shadow); }

/* 产品索引表格 */
.table-wrap { overflow-x: auto; margin-bottom: 12px; border-radius: var(--radius); box-shadow: var(--shadow); }
.index-table { width: 100%; border-collapse: collapse; background: #fff; min-width: 720px; }
.index-table th {
  background: linear-gradient(135deg, var(--navy-700), var(--navy-800));
  color: #fff; font-size: 14px; letter-spacing: .5px;
  padding: 15px 18px; text-align: left; font-weight: 700; white-space: nowrap;
}
.index-table td {
  padding: 13px 18px; font-size: 14px; color: var(--ink-soft);
  border-bottom: 1px solid var(--line); font-family: var(--mono);
}
.index-table tbody tr:hover td { background: var(--accent-soft); color: var(--ink); }
.index-table tbody tr:last-child td { border-bottom: 0; }
.index-table td a { color: inherit; }
.index-table td a:hover { color: var(--accent); text-decoration: underline; }

/* 实验室卡片 */
.lab-card { border-radius: var(--radius); overflow: hidden; position: relative; box-shadow: var(--shadow); }
.lab-card img { width: 100%; aspect-ratio: 4 / 2.9; object-fit: cover; transition: transform .5s; }
.lab-card:hover img { transform: scale(1.05); }
.lab-card figcaption {
  position: absolute; inset: auto 0 0 0; padding: 34px 20px 16px;
  color: #fff; font-size: 15px; font-weight: 600; letter-spacing: 1px;
  background: linear-gradient(180deg, transparent, rgba(6, 13, 26, .82));
}

/* ---------------- 元素分类 ---------------- */
.element-filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.chip {
  border: 1px solid rgba(255, 255, 255, .22); background: transparent;
  color: rgba(238, 243, 251, .8); font-size: 14px; font-family: var(--font);
  padding: 8px 18px; border-radius: 999px; cursor: pointer;
  transition: all .25s;
}
.chip:hover { border-color: var(--accent-2); color: var(--accent-2); }
.chip.is-active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent; color: #fff; font-weight: 600;
}

.ptable-scroll { overflow-x: auto; padding-bottom: 8px; }
.ptable {
  display: grid;
  grid-template-columns: repeat(18, minmax(56px, 1fr));
  grid-auto-rows: minmax(64px, auto);
  gap: 6px; min-width: 1080px;
}
.el {
  position: relative; border-radius: 8px; padding: 6px 7px;
  display: flex; flex-direction: column; justify-content: space-between;
  border: 1px solid transparent; cursor: default;
  transition: transform .25s, opacity .3s, filter .3s, box-shadow .25s;
}
.el:hover { transform: scale(1.12); z-index: 2; box-shadow: 0 10px 24px -8px rgba(0, 0, 0, .6); }
.el.has-link { cursor: pointer; }
.el .num { font-size: 9.5px; opacity: .75; line-height: 1; }
.el .sym { font-size: 17px; font-weight: 800; line-height: 1.15; }
.el .cn { font-size: 10.5px; opacity: .9; }
.el .wt { font-size: 8.5px; opacity: .6; font-family: var(--mono); }

.el[data-cat="alkali"]     { background: rgba(244, 114, 182, .16); border-color: rgba(244, 114, 182, .45); color: #fbcfe8; }
.el[data-cat="nonmetal"]   { background: rgba(74, 222, 128, .14);  border-color: rgba(74, 222, 128, .42);  color: #bbf7d0; }
.el[data-cat="alkaline"]   { background: rgba(251, 191, 36, .14);  border-color: rgba(251, 191, 36, .42);  color: #fde68a; }
.el[data-cat="maingroup"]  { background: rgba(96, 165, 250, .15);  border-color: rgba(96, 165, 250, .45);  color: #bfdbfe; }
.el[data-cat="metalloid"]  { background: rgba(45, 212, 191, .14);  border-color: rgba(45, 212, 191, .42);  color: #99f6e4; }
.el[data-cat="transition"] { background: rgba(167, 139, 250, .15); border-color: rgba(167, 139, 250, .45); color: #ddd6fe; }
.el[data-cat="lanthanide"] { background: rgba(251, 146, 60, .15);  border-color: rgba(251, 146, 60, .45);  color: #fed7aa; }

.el.is-ald::after {
  content: ""; position: absolute; top: 5px; right: 5px;
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-2); box-shadow: 0 0 8px var(--accent-2);
}
.ptable.is-filtering .el { opacity: .18; filter: saturate(.3); }
.ptable.is-filtering .el.is-match { opacity: 1; filter: none; }

.ptable-note { margin-top: 20px; font-size: 13.5px; color: rgba(238, 243, 251, .6); display: flex; align-items: center; gap: 8px; }
.dot-ald { width: 9px; height: 9px; border-radius: 50%; background: var(--accent-2); box-shadow: 0 0 8px var(--accent-2); display: inline-block; flex: none; }

/* ---------------- 关于与联系 ---------------- */
.contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; }
.contact-card {
  background: linear-gradient(160deg, var(--navy-700), var(--navy-800));
  color: #eef3fb; border-radius: var(--radius); padding: 30px 30px 26px;
  font-style: normal; box-shadow: var(--shadow);
}
.contact-card h4 { font-size: 18px; margin-bottom: 16px; letter-spacing: 1px; }
.contact-card ul { display: grid; gap: 12px; }
.contact-card li { display: flex; gap: 14px; font-size: 15px; align-items: baseline; }
.contact-card li span {
  flex: none; min-width: 44px; font-size: 12.5px; color: var(--accent-2);
  font-weight: 700; letter-spacing: 1px;
}
.contact-card a:hover { color: var(--accent-2); }

/* ---------------- 页脚 ---------------- */
.site-footer { background: var(--navy-900); color: rgba(238, 243, 251, .75); padding: 56px 0 0; }
.footer-inner {
  display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap;
  padding-bottom: 36px; border-bottom: 1px solid rgba(255, 255, 255, .1);
}
.footer-brand strong { color: #fff; font-size: 16px; letter-spacing: 1px; }
.footer-brand p { font-size: 13px; margin-top: 6px; opacity: .65; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; }
.footer-nav a { font-size: 13.5px; opacity: .75; transition: opacity .25s, color .25s; }
.footer-nav a:hover { opacity: 1; color: var(--accent-2); }
.footer-legal { padding: 20px 0 26px; }
.footer-legal p { font-size: 12.5px; opacity: .5; }
.footer-legal a:hover { color: var(--accent-2); }

/* ---------------- 动效 ---------------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-bg { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px) {
  .cols-3 { grid-template-columns: repeat(2, 1fr); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 26px 20px; }
  .prose-grid, .contact-grid, .feature-band { grid-template-columns: 1fr; }
  .gallery-row { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .section { padding: 68px 0; }
  .nav-toggle { display: block; }
  .site-nav {
    position: fixed; inset: 72px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 2px;
    background: rgba(6, 13, 26, .97); backdrop-filter: blur(14px);
    padding: 14px 5% 22px;
    transform: translateY(-130%); transition: transform .35s ease;
    box-shadow: 0 20px 40px -16px rgba(0, 0, 0, .6);
  }
  .site-nav.is-open { transform: translateY(0); }
  .site-nav a { padding: 12px 14px; font-size: 15px; }
  .site-nav a.nav-cta { margin: 8px 0 0; text-align: center; }
  .nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.is-open span:nth-child(2) { opacity: 0; }
  .nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .cols-2, .cols-3 { grid-template-columns: 1fr; }
  .hero-content { padding: 120px 0 70px; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .contact-card li { flex-direction: column; gap: 2px; }
}