/* ==========================================================================
   安徽日亿环保股份有限公司 — 企业官网样式表
   品牌主色：蒂芙尼绿 Tiffany Green #81D8CF　中性底色：冷调近白 #F5F9F8
   设计基调：清新柔和、轻奢高级、辨识度高
   ========================================================================== */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 主色：蒂芙尼绿（#81D8CF）向深浅两端延伸 */
  --green-950: #0e332f;
  --green-900: #123f3a;
  --green-800: #14514a;
  --green-700: #1b655d;
  --green-600: #257c72; /* 小字号文字安全色（白底对比度约 5:1） */
  --green-500: #81d8cf; /* 蒂芙尼绿 · 品牌主色 */
  --green-400: #abe3dd;
  --ink: #0e332f;
  --on-brand: #0e332f; /* 品牌色底上的文字颜色（深墨绿，对比度约 7:1） */

  /* 点缀：浅薄荷 / 深薄荷 / 次色（用于交替配色） */
  --lime: #a8e4dc;
  --lime-soft: #d9f2ee;
  --teal: #2a8c81;
  --alt: #3e9e96;
  --alt-500: #4fb3a9;
  --alt-soft: #a8e4dc;

  /* 中性：冷调近白（与冷色主色更协调） */
  --paper: #f5f9f8;
  --paper-2: #eaf3f1;
  --white: #ffffff;
  --muted: #5f736f;
  --muted-2: #8aa09c;
  --line: rgba(18, 59, 54, 0.13);
  --line-dark: rgba(255, 255, 255, 0.16);

  /* 渐变 */
  --grad-brand: linear-gradient(135deg, #2a8c81 0%, #81d8cf 52%, #a8e4dc 130%);
  --grad-alt: linear-gradient(135deg, #3e9e96 0%, #6fcbc1 60%, #bfe9e3 140%);
  --grad-deep: linear-gradient(155deg, #0e332f 0%, #174a44 48%, #1f6a61 100%);
  --grad-text: linear-gradient(100deg, #ffffff 8%, #d9f2ee 52%, #a8e4dc 100%);

  /* 阴影 */
  --shadow-sm: 0 2px 10px rgba(14, 51, 47, 0.06);
  --shadow-md: 0 18px 40px -18px rgba(14, 51, 47, 0.24);
  --shadow-lg: 0 40px 80px -30px rgba(14, 51, 47, 0.36);
  --shadow-glow: 0 24px 60px -24px rgba(129, 216, 207, 0.45);
  --shadow-glow-alt: 0 24px 60px -24px rgba(79, 179, 169, 0.4);

  /* 尺寸 */
  --radius-sm: 10px;
  --radius: 18px;
  --radius-lg: 28px;
  --container: 1200px;
  --header-h: 84px;

  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB",
    "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-display: "Optima", "PingFang SC", "Songti SC", "Source Han Serif SC", Georgia, serif;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- 2. 基础重置 ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--green-900);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, h4, h5 { margin: 0; line-height: 1.2; font-weight: 700; letter-spacing: -0.01em; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: var(--lime); color: var(--green-950); }

/* 滚动条 */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper-2); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--green-600), var(--green-800));
  border-radius: 20px;
}

/* ---------- 3. 布局工具 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}
.section { padding: 120px 0; position: relative; }
.section-tight { padding: 88px 0; }
.bg-paper { background: var(--paper); }
.bg-deep { background: var(--grad-deep); color: rgba(255, 255, 255, 0.82); }
.text-center { text-align: center; }

.grid { display: grid; gap: 28px; }
.g-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* ---------- 4. 标题与标签 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--green-600);
  margin-bottom: 20px;
}
.eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  background: var(--grad-brand);
  border-radius: 2px;
}
.bg-deep .eyebrow { color: var(--lime); }

.section-title {
  font-size: clamp(28px, 3.6vw, 46px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--green-900);
}
.bg-deep .section-title { color: #fff; }

.section-sub {
  margin-top: 20px;
  max-width: 660px;
  color: var(--muted);
  font-size: 16.5px;
}
.bg-deep .section-sub { color: rgba(255, 255, 255, 0.68); }
.text-center .section-sub { margin-left: auto; margin-right: auto; }

.head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 64px;
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 32px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    background 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
  white-space: nowrap;
}
.btn svg { width: 17px; height: 17px; }
.btn-primary {
  background: var(--grad-brand);
  color: var(--on-brand);
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 30px 60px -22px rgba(129, 216, 207, 0.75); }
.btn-ghost {
  border-color: var(--line);
  color: var(--green-800);
  background: rgba(255, 255, 255, 0.6);
}
.btn-ghost:hover { border-color: var(--green-500); color: var(--green-600); transform: translateY(-3px); }
.btn-light {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--line-dark);
  color: #fff;
  backdrop-filter: blur(10px);
}
.btn-light:hover { background: rgba(255, 255, 255, 0.18); transform: translateY(-3px); }
.btn-sm { padding: 11px 22px; font-size: 14px; }

/* ---------- 6. 顶部导航 ---------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease),
    height 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}
.site-header::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(31, 106, 97, 0.55), rgba(31, 106, 97, 0));
  opacity: 1;
  transition: opacity 0.4s var(--ease);
  pointer-events: none;
}
.site-header.is-stuck {
  height: 72px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: saturate(180%) blur(18px);
  box-shadow: 0 12px 34px -22px rgba(14, 51, 47, 0.45);
}
.site-header.is-stuck::after { opacity: 0; }

.header-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 26px;
}

/* 品牌 */
.brand { display: flex; align-items: center; gap: 13px; }
.brand-mark {
  width: 46px;
  height: 46px;
  flex: none;
  border-radius: 13px;
  background: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 10px 24px -12px rgba(14, 51, 47, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.52);
  overflow: hidden;
  transition: box-shadow 0.4s var(--ease), border-color 0.4s var(--ease),
    transform 0.4s var(--ease);
}
.brand-mark img {
  width: 79%;
  height: auto;
  display: block;
}
.brand:hover .brand-mark { transform: translateY(-1px) rotate(-2deg); }
.site-header.is-stuck .brand-mark {
  border-color: var(--line);
  box-shadow: 0 8px 18px -14px rgba(14, 51, 47, 0.7);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-text strong {
  font-size: 17.5px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #fff;
  transition: color 0.4s var(--ease);
}
.brand-text em {
  font-style: normal;
  font-size: 10.5px;
  letter-spacing: 0.34em;
  color: rgba(255, 255, 255, 0.62);
  transition: color 0.4s var(--ease);
}
.site-header.is-stuck .brand-text strong { color: var(--green-900); }
.site-header.is-stuck .brand-text em { color: var(--green-500); }

/* 菜单 */
.nav { display: flex; align-items: center; gap: 6px; }
.nav > a {
  position: relative;
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.82);
  transition: color 0.3s var(--ease), background 0.3s var(--ease);
}
.nav > a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: translateX(-50%);
  transition: width 0.35s var(--ease);
}
.nav > a:hover { color: #fff; }
.nav > a:hover::after { width: 22px; }
.nav > a.is-active { color: #fff; }
.nav > a.is-active::after { width: 22px; }
.site-header.is-stuck .nav > a { color: var(--green-800); }
.site-header.is-stuck .nav > a:hover,
.site-header.is-stuck .nav > a.is-active { color: var(--green-600); }

.header-cta { display: flex; align-items: center; gap: 18px; }
.header-phone {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
  transition: color 0.4s var(--ease);
}
.header-phone svg { width: 17px; height: 17px; color: var(--lime); }
.site-header.is-stuck .header-phone { color: var(--green-800); }
.header-cta .btn-light { padding: 11px 20px; font-size: 14px; }
.site-header.is-stuck .header-cta .btn-light {
  background: var(--grad-brand);
  border-color: transparent;
  color: var(--on-brand);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line-dark);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  position: relative;
  z-index: 3;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  position: absolute;
  left: 50%;
  width: 19px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transform: translateX(-50%);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease), background 0.4s var(--ease);
}
.nav-toggle span { top: 50%; margin-top: -1px; }
.nav-toggle span::before { content: ""; top: -6px; }
.nav-toggle span::after { content: ""; top: 6px; }
.site-header.is-stuck .nav-toggle { border-color: var(--line); background: rgba(18, 59, 54, 0.05); }
.site-header.is-stuck .nav-toggle span,
.site-header.is-stuck .nav-toggle span::before,
.site-header.is-stuck .nav-toggle span::after { background: var(--green-800); }
body.nav-open .nav-toggle span { background: #fff; transform: translateX(-50%) rotate(45deg); }
body.nav-open .nav-toggle span::before { opacity: 0; }
body.nav-open .nav-toggle span::after { transform: rotate(-90deg); top: 0; }

/* ---------- 7. Hero 首屏 ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 60px) 0 80px;
  background: var(--grad-deep);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; z-index: -1; }
/* 首屏实景：厂区航拍 + 品牌色遮罩，保证文字可读 */
.hero-photo {
  position: absolute;
  inset: 0;
  background: url("../images/factory-02.jpg") center / cover no-repeat;
}
.hero-photo::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(14, 51, 47, 0.96) 0%, rgba(14, 51, 47, 0.86) 38%, rgba(23, 74, 68, 0.6) 100%);
}


.hero-bg .glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.55;
}
.hero-bg .glow-1 {
  width: 640px; height: 640px;
  background: radial-gradient(circle, rgba(129, 216, 207, 0.5), transparent 70%);
  top: -160px; right: -120px;
  animation: float 18s ease-in-out infinite;
}
.hero-bg .glow-2 {
  width: 540px; height: 540px;
  background: radial-gradient(circle, rgba(42, 140, 129, 0.38), transparent 68%);
  bottom: -180px; left: -100px;
  animation: float 22s ease-in-out infinite reverse;
}
.hero-bg .glow-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(62, 158, 150, 0.32), transparent 70%);
  top: 40%; left: 46%;
  animation: float 26s ease-in-out infinite;
}
.hero-bg .mesh {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 40%, #000 20%, transparent 82%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 40%, #000 20%, transparent 82%);
}
.hero-bg .rings {
  position: absolute;
  right: -8%;
  top: 50%;
  width: min(760px, 62vw);
  transform: translateY(-50%);
  opacity: 0.42;
  animation: spin-slow 90s linear infinite;
}

.hero-inner { position: relative; width: 100%; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  gap: 60px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px 8px 12px;
  border-radius: 999px;
  border: 1px solid var(--line-dark);
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(12px);
  font-size: 13.5px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 30px;
}
.hero-tag .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 5px rgba(168, 228, 220, 0.18);
  animation: pulse 2.4s ease-in-out infinite;
}
.hero h1 {
  font-size: clamp(38px, 5.6vw, 74px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
}
.hero h1 .grad {
  background: var(--grad-text);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-lead {
  margin-top: 28px;
  max-width: 560px;
  font-size: 17px;
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.7);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 42px; }

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: 64px;
  padding-top: 34px;
  border-top: 1px solid var(--line-dark);
}
.hero-metrics .metric { padding-right: 26px; }
.hero-metrics .metric + .metric { padding-left: 26px; border-left: 1px solid var(--line-dark); }
.metric b {
  display: block;
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
  font-variant-numeric: tabular-nums;
}
.metric b .unit { font-size: 0.5em; font-weight: 600; margin-left: 4px; color: var(--lime); }
.metric span { display: block; margin-top: 6px; font-size: 13.5px; color: rgba(255, 255, 255, 0.55); }

/* Hero 右侧工艺卡 */
.hero-card {
  position: relative;
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-dark);
  background: linear-gradient(150deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.03));
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  animation: rise 1s var(--ease) both 0.3s;
}
.hero-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}
.hero-card-head h3 { font-size: 16.5px; letter-spacing: 0.04em; color: #fff; }
.hero-card-head span { font-size: 12px; letter-spacing: 0.2em; color: var(--lime); }
.flow-list { display: grid; gap: 10px; }
.flow-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 15px 18px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.07);
  transition: transform 0.35s var(--ease), background 0.35s var(--ease),
    border-color 0.35s var(--ease);
}
.flow-item:hover {
  transform: translateX(6px);
  background: rgba(168, 228, 220, 0.12);
  border-color: rgba(168, 228, 220, 0.35);
}
.flow-item .idx {
  width: 34px; height: 34px; flex: none;
  display: grid; place-items: center;
  border-radius: 11px;
  background: var(--grad-brand);
  font-size: 13px; font-weight: 800; color: var(--on-brand);
}
.flow-item .name { font-size: 15px; font-weight: 600; color: #fff; }
.flow-item .desc { font-size: 12.5px; color: rgba(255, 255, 255, 0.5); }
.flow-item .arrow { margin-left: auto; color: rgba(255, 255, 255, 0.35); width: 16px; height: 16px; }

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 34px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  letter-spacing: 0.3em;
  color: rgba(255, 255, 255, 0.4);
}
.hero-scroll i {
  width: 1px; height: 46px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.5), transparent);
  animation: drop 2.2s ease-in-out infinite;
}

/* ---------- 8. 卡片组件 ---------- */
.card {
  display: block;
  position: relative;
  padding: 38px 34px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease),
    border-color 0.45s var(--ease);
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: transparent; }
.card:hover::before { transform: scaleX(1); }

.card-icon {
  width: 58px; height: 58px;
  border-radius: 16px;
  display: grid; place-items: center;
  background: linear-gradient(140deg, rgba(129, 216, 207, 0.12), rgba(168, 228, 220, 0.2));
  color: var(--green-600);
  margin-bottom: 24px;
  transition: background 0.4s var(--ease), color 0.4s var(--ease), transform 0.4s var(--ease);
}
.card-icon svg { width: 27px; height: 27px; }
.card:hover .card-icon { background: var(--grad-brand); color: var(--on-brand); transform: scale(1.05) rotate(-4deg); }
/* 交替卡片使用品牌蓝，画面不再单一绿调 */
.grid .card:nth-child(2n) .card-icon {
  background: linear-gradient(140deg, rgba(62, 158, 150, 0.13), rgba(79, 179, 169, 0.2));
  color: var(--alt);
}
.grid .card:nth-child(2n):hover .card-icon { background: var(--grad-alt); color: var(--on-brand); }
.grid .card:nth-child(2n)::before { background: var(--grad-alt); }
.card h3 { font-size: 20px; margin-bottom: 12px; color: var(--green-900); }
.card p { color: var(--muted); font-size: 15px; }

/* 深色区卡片 */
.bg-deep .card {
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
  border-color: var(--line-dark);
  box-shadow: none;
  backdrop-filter: blur(10px);
}
.bg-deep .card h3 { color: #fff; }
.bg-deep .card p { color: rgba(255, 255, 255, 0.62); }
.bg-deep .card-icon { background: rgba(168, 228, 220, 0.14); color: var(--lime); }
.bg-deep .card:hover { border-color: rgba(168, 228, 220, 0.4); box-shadow: 0 30px 60px -34px rgba(0, 0, 0, 0.9); }

/* ---------- 9. 工艺板块（四大工序） ---------- */
.process-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 70px;
  align-items: center;
  padding: 74px 0;
}
.process-block + .process-block { border-top: 1px solid var(--line); }
.process-block.is-reverse .process-visual { order: -1; }

.process-index {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.34em;
  color: var(--green-600);
  margin-bottom: 18px;
}
.process-block h3 {
  font-size: clamp(25px, 2.8vw, 36px);
  color: var(--green-900);
  margin-bottom: 20px;
}
.process-block h3 small {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.26em;
  color: var(--muted-2);
  text-transform: uppercase;
}
.process-block > .process-copy > p { color: var(--muted); font-size: 16px; }

.tag-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.tag {
  padding: 7px 15px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--green-700);
  background: rgba(129, 216, 207, 0.08);
  border: 1px solid rgba(129, 216, 207, 0.16);
}

.check-list { display: grid; gap: 12px; margin-top: 26px; }
.check-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 15px;
  color: var(--green-800);
}
.check-list svg { width: 19px; height: 19px; flex: none; margin-top: 4px; color: var(--green-500); }

/* 视觉图形容器 */
.process-visual {
  position: relative;
  aspect-ratio: 4 / 3.2;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--grad-deep);
  box-shadow: var(--shadow-md);
}
.process-visual .art { position: absolute; inset: 0; }
.process-visual .art svg { width: 100%; height: 100%; }
.process-visual .badge {
  position: absolute;
  left: 24px;
  bottom: 24px;
  padding: 12px 20px;
  border-radius: 999px;
  background: rgba(31, 106, 97, 0.6);
  border: 1px solid var(--line-dark);
  backdrop-filter: blur(12px);
  color: #fff;
  font-size: 13.5px;
  font-weight: 600;
  letter-spacing: 0.06em;
  display: flex;
  align-items: center;
  gap: 10px;
}
.process-visual .badge em {
  font-style: normal;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

/* 数据条 */
.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.stat-strip .item {
  background: var(--white);
  padding: 32px 26px;
  text-align: center;
  transition: background 0.4s var(--ease);
}
.stat-strip .item:hover { background: var(--paper-2); }
.stat-strip b {
  display: block;
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--green-700);
  font-variant-numeric: tabular-nums;
}
.stat-strip b .unit { font-size: 0.5em; margin-left: 3px; color: var(--teal); }
.stat-strip span { font-size: 13.5px; color: var(--muted); }
.stat-strip.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.stat-strip.cols-3 .item { padding: 26px 20px; }
.stat-strip.cols-3 b { font-size: 26px; }

/* 价值链条：回收—加工—造粒—服务 */
.chain {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px;
}
.chain-item {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease);
}
.chain-item:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.chain-item .n {
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: var(--green-600);
}
.chain-item h4 { margin: 12px 0 10px; font-size: 19px; color: var(--green-900); }
.chain-item p { color: var(--muted); font-size: 14.5px; }
.chain-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -12px;
  top: 50%;
  width: 22px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: translateY(-50%);
}
.bg-deep .chain-item {
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.03));
  border-color: var(--line-dark);
  box-shadow: none;
}
.bg-deep .chain-item h4 { color: #fff; }
.bg-deep .chain-item p { color: rgba(255, 255, 255, 0.66); }
.bg-deep .chain-item .n { color: var(--lime); }

/* 产品系列卡 */
.series-card {
  display: flex;
  flex-direction: column;
  position: relative;
  padding: 36px 32px 32px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease),
    border-color 0.45s var(--ease);
}
.series-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--grad-brand);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease);
}
.series-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); border-color: transparent; }
.series-card:hover::before { transform: scaleX(1); }
.series-card:nth-child(2n)::before { background: var(--grad-alt); }
.series-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}
.series-head .n {
  font-family: var(--font-display);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: var(--green-600);
}
.series-card:nth-child(2n) .series-head .n { color: var(--alt); }
.series-head .badge-mini {
  font-size: 12px;
  padding: 5px 12px;
  border-radius: 999px;
  color: var(--green-800);
  background: rgba(129, 216, 207, 0.14);
  border: 1px solid rgba(129, 216, 207, 0.24);
}
.series-card:nth-child(2n) .series-head .badge-mini {
  color: var(--alt);
  background: rgba(62, 158, 150, 0.1);
  border-color: rgba(62, 158, 150, 0.2);
}
.series-card h3 { font-size: 21px; margin-bottom: 14px; color: var(--green-900); }
.series-card > p { color: var(--muted); font-size: 15px; }
.grade-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.grade-list span {
  font-size: 12.5px;
  padding: 6px 13px;
  border-radius: 8px;
  background: var(--paper-2);
  color: var(--green-700);
  border: 1px solid rgba(129, 216, 207, 0.16);
}
.series-card:nth-child(2n) .grade-list span {
  color: var(--alt);
  background: rgba(62, 158, 150, 0.07);
  border-color: rgba(62, 158, 150, 0.16);
}
.series-foot {
  margin-top: auto;
  padding-top: 22px;
  font-size: 13px;
  color: var(--muted-2);
}

/* 板块下的工艺环节 */
.step-list { display: grid; gap: 10px; margin-top: 24px; }
.step-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  border-radius: 12px;
  background: var(--paper-2);
  font-size: 14.5px;
  color: var(--green-800);
  transition: background 0.35s var(--ease), transform 0.35s var(--ease);
}
.step-list li:hover { background: rgba(129, 216, 207, 0.16); transform: translateX(4px); }
.step-list li b {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  flex: none;
  border-radius: 8px;
  background: var(--grad-brand);
  color: var(--on-brand);
  font-size: 12px;
  font-weight: 700;
}
.step-list li span { color: var(--muted); margin-left: auto; font-size: 13px; }

/* 深色区中的工艺区块（前端打包站等） */
.bg-deep .process-index { color: var(--lime); }
.bg-deep .process-block h3 { color: #fff; }
.bg-deep .process-block h3 small { color: rgba(255, 255, 255, 0.45); }
.bg-deep .process-block > .process-copy > p { color: rgba(255, 255, 255, 0.7); }
.bg-deep .check-list li { color: rgba(255, 255, 255, 0.82); }
.bg-deep .check-list svg { color: var(--lime); }
.bg-deep .step-list li { background: rgba(255, 255, 255, 0.07); color: #fff; }
.bg-deep .step-list li:hover { background: rgba(168, 228, 220, 0.16); }
.bg-deep .step-list li span { color: rgba(255, 255, 255, 0.5); }
.bg-deep .tag {
  color: var(--lime);
  background: rgba(168, 228, 220, 0.1);
  border-color: rgba(168, 228, 220, 0.22);
}

/* ---------- 10. 图片与图集 ---------- */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: var(--green-950);
  box-shadow: var(--shadow-md);
}
.media img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s var(--ease);
}
.media:hover img { transform: scale(1.04); }
.media--3x2 { aspect-ratio: 3 / 2; }
.media--4x3 { aspect-ratio: 4 / 3; }
.media--16x9 { aspect-ratio: 16 / 9; }
.media--3x4 { aspect-ratio: 3 / 4; }
.media--1x1 { aspect-ratio: 1 / 1; }
.media-tag {
  position: absolute;
  left: 18px;
  bottom: 18px;
  padding: 9px 16px;
  border-radius: 999px;
  background: rgba(14, 51, 47, 0.62);
  border: 1px solid var(--line-dark);
  backdrop-filter: blur(10px);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.photo-grid { display: grid; gap: 20px; }
.photo-grid.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.photo-grid.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.photo-grid.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }

/* 产品实拍 */
.showcase-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 64px;
  align-items: center;
}
.showcase-copy .section-sub { max-width: 100%; }

/* 工艺区块 / 关于页视觉块中的实拍图 */
.art img,
.about-visual img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about-visual--photo { aspect-ratio: 4 / 3.4; }
.map-wrap--photo { padding: 0; }
.map-wrap--photo img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}
.map-wrap--photo .mesh { opacity: 0.35; }

/* ---------- 11. 产品卡 ---------- */
.product-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--white);
  transition: transform 0.45s var(--ease), box-shadow 0.45s var(--ease);
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-md); }
.product-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--grad-deep);
}
.product-thumb svg { width: 100%; height: 100%; }
.product-thumb .chip {
  position: absolute;
  top: 16px;
  left: 16px;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--green-950);
  background: var(--lime);
}
.product-body { padding: 26px 26px 30px; }
.product-body h3 { font-size: 19px; margin-bottom: 10px; }
.product-body p { color: var(--muted); font-size: 14.5px; }
.spec-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}
.spec-list span {
  font-size: 12.5px;
  padding: 5px 12px;
  border-radius: 8px;
  background: var(--paper-2);
  color: var(--green-700);
}

/* 产品筛选 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 44px;
}
.filter-bar button {
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--green-800);
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s var(--ease);
}
.filter-bar button:hover { border-color: var(--green-400); color: var(--green-600); }
.filter-bar button.is-on {
  background: var(--grad-brand);
  border-color: transparent;
  color: var(--on-brand);
  box-shadow: var(--shadow-glow);
}
.is-hidden { display: none !important; }

/* ---------- 11. 页面横幅（子页面） ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--header-h) + 96px) 0 96px;
  background: var(--grad-deep);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.page-hero .glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  z-index: -1;
}
.page-hero .glow-a {
  width: 580px; height: 580px;
  background: radial-gradient(circle, rgba(129, 216, 207, 0.5), transparent 70%);
  top: -220px; right: -80px;
}
.page-hero .glow-b {
  width: 440px; height: 440px;
  background: radial-gradient(circle, rgba(62, 158, 150, 0.34), transparent 70%);
  bottom: -220px; left: 4%;
}
.page-hero .mesh {
  position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 80% at 30% 20%, #000, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 30% 20%, #000, transparent 78%);
}
.page-hero h1 {
  font-size: clamp(32px, 4.6vw, 58px);
  font-weight: 800;
  letter-spacing: -0.02em;
}
.page-hero p {
  margin-top: 22px;
  max-width: 640px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 16.5px;
}
.crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 24px;
}
.crumb a:hover { color: var(--lime); }
.crumb i { font-style: normal; opacity: 0.5; }

/* ---------- 12. 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  gap: 72px;
  align-items: center;
}
.about-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--grad-deep);
  aspect-ratio: 1 / 1.1;
  box-shadow: var(--shadow-lg);
}
.about-visual svg { width: 100%; height: 100%; }
.about-visual .float-card {
  position: absolute;
  right: 22px;
  bottom: 22px;
  padding: 20px 24px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-md);
}
.about-visual .float-card b {
  display: block;
  font-size: 30px;
  font-weight: 800;
  color: var(--green-700);
  letter-spacing: -0.02em;
}
.about-visual .float-card span { font-size: 13px; color: var(--muted); }

.value-item {
  display: flex;
  gap: 20px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.value-item:last-child { border-bottom: none; }
.value-item .num {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--green-400);
  padding-top: 5px;
  flex: none;
}
.value-item h4 { font-size: 19px; margin-bottom: 8px; }
.value-item p { color: var(--muted); font-size: 15px; }

/* 品牌标识卡 */
.brand-card {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-top: 36px;
  padding: 26px 30px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.brand-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.brand-card img { width: 92px; height: auto; flex: none; }
.brand-card strong {
  display: block;
  font-size: 16px;
  letter-spacing: 0.02em;
  color: var(--green-900);
}
.brand-card strong i {
  font-style: normal;
  letter-spacing: 0.2em;
  color: var(--alt);
}
.brand-card p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* 时间轴 */
.timeline { position: relative; padding-left: 42px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 9px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--green-400), rgba(129, 216, 207, 0.05));
}
.timeline li { position: relative; padding-bottom: 40px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: "";
  position: absolute;
  left: -40px; top: 6px;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--green-500);
  box-shadow: 0 0 0 5px rgba(129, 216, 207, 0.1);
}
.timeline b {
  display: block;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--green-600);
  margin-bottom: 6px;
}
.timeline h4 { font-size: 18px; margin-bottom: 6px; }
.timeline p { color: var(--muted); font-size: 14.5px; }

/* ---------- 13. 联系页 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 60px;
  align-items: start;
}
.info-list { display: grid; gap: 18px; }
.info-item {
  display: flex;
  gap: 20px;
  padding: 26px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--white);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.info-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.info-item .ico {
  width: 50px; height: 50px; flex: none;
  border-radius: 15px;
  display: grid; place-items: center;
  background: var(--grad-brand);
  color: var(--on-brand);
  box-shadow: var(--shadow-glow);
}
.info-item .ico svg { width: 22px; height: 22px; }
/* 联系信息图标交替使用品牌绿与品牌蓝，避免整屏同色 */
.info-item:nth-child(2n) .ico {
  background: var(--grad-alt);
  box-shadow: var(--shadow-glow-alt);
}
.info-item span { display: block; font-size: 12.5px; letter-spacing: 0.18em; color: var(--muted-2); }
.info-item b { display: block; margin-top: 6px; font-size: 17px; color: var(--green-900); word-break: break-all; }
.info-item small { display: block; margin-top: 4px; color: var(--muted); font-size: 13.5px; }

.form-card {
  padding: 42px;
  border-radius: var(--radius-lg);
  background: var(--white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-md);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field { margin-bottom: 18px; }
.field label {
  display: block;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--green-800);
  margin-bottom: 9px;
}
.field label i { font-style: normal; color: #d9534f; }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 14px 16px;
  font-family: inherit;
  font-size: 15px;
  color: var(--green-900);
  background: var(--paper);
  border: 1px solid transparent;
  border-radius: 12px;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}
.field textarea { resize: vertical; min-height: 128px; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  background: #fff;
  border-color: var(--green-400);
  box-shadow: 0 0 0 4px rgba(171, 227, 221, 0.14);
}
.field input::placeholder,
.field textarea::placeholder { color: #aebebb; }
.form-note { font-size: 13px; color: var(--muted-2); margin-top: 16px; }
.form-msg {
  display: none;
  margin-top: 18px;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 14.5px;
  background: rgba(129, 216, 207, 0.1);
  color: var(--green-700);
  border: 1px solid rgba(129, 216, 207, 0.2);
}
.form-msg.is-on { display: block; animation: rise 0.5s var(--ease) both; }

.map-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--grad-deep);
  min-height: 340px;
  display: grid;
  place-items: center;
  text-align: center;
  color: #fff;
  padding: 40px;
}
.map-wrap .pin {
  width: 62px; height: 62px;
  margin: 0 auto 20px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--grad-brand);
  box-shadow: 0 0 0 12px rgba(168, 228, 220, 0.14);
  animation: pulse-ring 2.8s ease-out infinite;
}
.map-wrap h3 { font-size: 21px; margin-bottom: 10px; }
.map-wrap p { color: rgba(255, 255, 255, 0.65); font-size: 14.5px; }
.map-wrap .mesh {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  opacity: 0.7;
}
.map-wrap > * { position: relative; z-index: 1; }

/* ---------- 14. CTA 区块 ---------- */
.cta-band {
  position: relative;
  padding: 88px 0;
  background: var(--grad-deep);
  color: #fff;
  overflow: hidden;
  isolation: isolate;
}
.cta-band .glow {
  position: absolute;
  width: 640px; height: 640px;
  border-radius: 50%;
  filter: blur(80px);
  background:
    radial-gradient(circle at 72% 26%, rgba(42, 140, 129, 0.34), transparent 62%),
    radial-gradient(circle at 34% 74%, rgba(129, 216, 207, 0.42), transparent 66%);
  top: -260px; right: -120px;
  z-index: -1;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 50px;
  flex-wrap: wrap;
}
.cta-inner h2 {
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  max-width: 640px;
}
.cta-inner p { margin-top: 16px; color: rgba(255, 255, 255, 0.66); max-width: 560px; }
.cta-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ---------- 15. 页脚 ---------- */
.site-footer {
  background: var(--green-950);
  color: rgba(255, 255, 255, 0.62);
  padding: 84px 0 0;
  font-size: 14.5px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 50px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line-dark);
}
.footer-brand .brand { margin-bottom: 22px; }
.footer-brand p { max-width: 330px; line-height: 1.9; font-size: 14px; }
.footer-seal {
  display: flex;
  gap: 10px;
  margin-top: 24px;
}
.footer-seal span {
  font-size: 11.5px;
  letter-spacing: 0.1em;
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--line-dark);
  color: rgba(255, 255, 255, 0.6);
}
.footer-col h4 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 22px;
  letter-spacing: 0.04em;
}
.footer-col li { margin-bottom: 13px; }
.footer-col a { transition: color 0.3s var(--ease), padding-left 0.3s var(--ease); }
.footer-col a:hover { color: var(--lime); padding-left: 5px; }
.footer-contact li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
}
.footer-contact svg { width: 17px; height: 17px; flex: none; margin-top: 4px; color: var(--lime); }
.footer-contact b { color: #fff; font-weight: 600; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 26px 0 32px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}
.footer-bottom a:hover { color: var(--lime); }

/* 回到顶部 */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 50px; height: 50px;
  border-radius: 15px;
  display: grid; place-items: center;
  background: var(--grad-brand);
  color: var(--on-brand);
  border: none;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: all 0.4s var(--ease);
  z-index: 80;
}
.to-top.is-on { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { transform: translateY(-4px); }
.to-top svg { width: 20px; height: 20px; }

/* ---------- 16. 滚动动效 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- 17. 动画关键帧 ---------- */
@keyframes float {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(-26px, 30px, 0) scale(1.06); }
}
@keyframes spin-slow { to { transform: translateY(-50%) rotate(360deg); } }
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 5px rgba(168, 228, 220, 0.2); }
  50% { box-shadow: 0 0 0 10px rgba(168, 228, 220, 0.05); }
}
@keyframes pulse-ring {
  0% { box-shadow: 0 0 0 0 rgba(168, 228, 220, 0.35); }
  70% { box-shadow: 0 0 0 26px rgba(168, 228, 220, 0); }
  100% { box-shadow: 0 0 0 0 rgba(168, 228, 220, 0); }
}
@keyframes drop {
  0% { transform: scaleY(0.2); transform-origin: top; opacity: 0; }
  50% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(0.2); transform-origin: bottom; opacity: 0; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 18. 响应式 ---------- */
@media (max-width: 1080px) {
  .section { padding: 92px 0; }
  .g-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chain { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chain-item:not(:last-child)::after { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: 52px; }
  .hero-card { max-width: 560px; }
  .about-grid { grid-template-columns: 1fr; gap: 46px; }
  .about-visual { aspect-ratio: 16 / 11; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .process-block { grid-template-columns: 1fr; gap: 40px; padding: 56px 0; }
  .process-block.is-reverse .process-visual { order: 0; }
  .showcase-grid { grid-template-columns: 1fr; gap: 38px; }
  .filter-bar { margin-bottom: 32px; }
}

@media (max-width: 900px) {
  .nav {
    position: fixed;
    inset: 0;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 8px;
    padding: 0 40px;
    background: linear-gradient(160deg, rgba(31, 106, 97, 0.97), rgba(18, 59, 54, 0.97));
    backdrop-filter: blur(20px);
    clip-path: circle(0% at calc(100% - 52px) 42px);
    transition: clip-path 0.6s var(--ease);
    z-index: 2;
  }
  body.nav-open .nav { clip-path: circle(150% at calc(100% - 52px) 42px); }
  .nav > a {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    padding: 12px 0;
  }
  .nav > a::after { display: none; }
  .nav-toggle { display: block; }
  .header-cta .btn-light { display: none; }
  .header-cta .header-phone { display: none; }
  .site-header.is-stuck .nav-toggle span,
  .site-header.is-stuck .nav-toggle span::before,
  .site-header.is-stuck .nav-toggle span::after { background: var(--green-800); }
  body.nav-open .nav-toggle {
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--line-dark);
  }
  body.nav-open .nav-toggle span,
  body.nav-open .nav-toggle span::before,
  body.nav-open .nav-toggle span::after { background: #fff; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .stat-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  :root { --header-h: 72px; }
  .container { padding: 0 20px; }
  .section { padding: 74px 0; }
  .g-2, .g-3, .g-4 { grid-template-columns: 1fr; }
  .chain { grid-template-columns: 1fr; }
  .photo-grid.g3, .photo-grid.g4 { grid-template-columns: 1fr; }
  .stat-strip.cols-3 { grid-template-columns: 1fr; }
  .series-head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .head-row { flex-direction: column; align-items: flex-start; gap: 24px; margin-bottom: 44px; }
  .hero { padding-top: calc(var(--header-h) + 34px); }
  .hero-metrics { grid-template-columns: 1fr; gap: 22px; margin-top: 44px; }
  .hero-metrics .metric { padding: 0; }
  .hero-metrics .metric + .metric {
    padding-left: 0;
    border-left: none;
    padding-top: 22px;
    border-top: 1px solid var(--line-dark);
  }
  .hero-scroll { display: none; }
  .brand-text strong { font-size: 15.5px; }
  .brand-mark { width: 40px; height: 40px; }
  .card { padding: 30px 24px; }
  .form-card { padding: 28px 22px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .timeline { padding-left: 34px; }
  .timeline li::before { left: -32px; width: 16px; height: 16px; }
  .brand-card { flex-direction: column; align-items: flex-start; gap: 18px; padding: 24px 22px; }
  .brand-card img { width: 78px; }
  .to-top { right: 16px; bottom: 16px; width: 46px; height: 46px; }
}

/* ---------- 19. 打印与无障碍 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}
:focus-visible {
  outline: 2px solid var(--green-400);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ==========================================================================
   产品详情页（product-*.html）
   ========================================================================== */

/* 详情页首屏：沿用 page-hero，加系列标签 */
.pd-series {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-dark);
  background: rgba(255, 255, 255, 0.08);
  color: var(--lime);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}

/* 示例数据提示条 */
.pd-notice {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 20px;
  border-radius: 14px;
  background: rgba(129, 216, 207, 0.16);
  border: 1px solid rgba(37, 124, 114, 0.24);
  color: var(--green-800);
  font-size: 13.5px;
  margin-bottom: 34px;
}
.pd-notice b { color: var(--green-700); }
.pd-notice svg { width: 18px; height: 18px; flex: none; color: var(--green-600); }

/* 介绍区两栏 */
.pd-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 64px;
  align-items: start;
}
.pd-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--green-950);
  box-shadow: var(--shadow-lg);
  aspect-ratio: 3 / 4;
}
.pd-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1s var(--ease);
}
.pd-media:hover img { transform: scale(1.03); }
.pd-body .section-title { font-size: clamp(22px, 2.4vw, 30px); }
.pd-body .check-list { margin-top: 26px; }
.pd-body .hero-actions { margin-top: 34px; }

/* 技术参数 */
.pd-specs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 30px 56px;
}
.pd-spec-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 12px;
}
.pd-spec-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--green-900);
  line-height: 1.3;
}
.pd-spec-name em {
  display: block;
  font-style: normal;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-top: 3px;
}
.pd-spec-val {
  font-size: 21px;
  font-weight: 800;
  color: var(--green-700);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  letter-spacing: -0.01em;
}
.pd-spec-val i {
  font-style: normal;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  margin-left: 3px;
}
.pd-spec-track {
  height: 9px;
  border-radius: 999px;
  background: var(--paper-2);
  overflow: hidden;
}
.pd-spec-fill {
  height: 100%;
  width: 0;
  border-radius: inherit;
  background: var(--grad-brand);
  transition: width 1.1s var(--ease);
}
.is-visible .pd-spec-fill { width: var(--v, 0%); }

/* 等级型参数（如阻燃等级） */
.pd-spec.is-tag .pd-spec-track { display: none; }
.pd-spec-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: 9px;
  background: rgba(129, 216, 207, 0.26);
  border: 1px solid rgba(37, 124, 114, 0.2);
  color: var(--green-700);
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

/* 待补充状态 */
.pd-spec.is-pending .pd-spec-val { font-size: 15px; font-weight: 600; color: var(--muted-2); }
.pd-spec.is-pending .pd-spec-track {
  background: repeating-linear-gradient(90deg, var(--paper-2) 0 9px, transparent 9px 16px);
}

/* 应用领域 */
.pd-apps {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}
.pd-apps span {
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid var(--line);
  font-size: 14px;
  color: var(--green-800);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.pd-apps span:hover { border-color: var(--green-500); color: var(--green-600); }

/* 相关产品 */
.pd-related .product-card { height: 100%; }

@media (max-width: 1080px) {
  .pd-grid { grid-template-columns: 1fr; gap: 40px; }
  .pd-media { aspect-ratio: 16 / 10; }
  .pd-specs { grid-template-columns: 1fr; gap: 26px; }
}
@media (max-width: 700px) {
  .pd-notice { font-size: 12.5px; padding: 12px 16px; }
  .pd-spec-val { font-size: 18px; }
}

/* ---------- 产品卡整卡可点击 ---------- */
.card-link { color: inherit; text-decoration: none; }
.card-link::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  border-radius: inherit;
}
.product-card:hover .card-link { color: var(--green-600); }
.product-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--green-600);
}
.product-more span { transition: transform 0.3s var(--ease); }
.product-card:hover .product-more span { transform: translateX(4px); }

/* ==========================================================================
   企业宣传片
   ========================================================================== */
.film-frame {
  position: relative;
  aspect-ratio: 1920 / 972;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--green-950);
  box-shadow: var(--shadow-lg);
}
.film-frame video {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #000;
}
.film-play {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  border: 0;
  padding: 0;
  cursor: pointer;
  color: #fff;
  background: linear-gradient(180deg, rgba(6, 24, 22, 0.18) 0%, rgba(6, 24, 22, 0.58) 100%);
  transition: background 0.4s var(--ease);
}
.film-play:hover {
  background: linear-gradient(180deg, rgba(6, 24, 22, 0.06) 0%, rgba(6, 24, 22, 0.48) 100%);
}
.film-play i {
  display: grid;
  place-items: center;
  width: 78px;
  height: 78px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.94);
  color: var(--green-800);
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.4);
  transition: transform 0.35s var(--ease), background 0.35s var(--ease);
}
.film-play:hover i { transform: scale(1.07); background: #fff; }
.film-play i svg { width: 26px; height: 26px; margin-left: 4px; }
.film-play span {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.55);
}
.film-frame.is-playing .film-play { display: none; }

.film-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 22px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 13.5px;
}
.film-meta b { color: var(--green-800); font-weight: 600; }

@media (max-width: 700px) {
  .film-play i { width: 62px; height: 62px; }
  .film-play i svg { width: 22px; height: 22px; }
  .film-play span { font-size: 12.5px; }
}

/* PC / 手机版切换入口（页脚） */
.view-switch { margin-top: 20px; }
.view-switch a {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 16px; border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.72);
  font-size: 12.5px; text-decoration: none;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.view-switch a:hover { color: #fff; border-color: rgba(255, 255, 255, 0.45); }