/* ==========================================================================
   陕西果智芯能农业科技有限责任公司 官网样式 v2
   生机草绿主题：明亮草绿底 × 霓虹青 × 荧光绿 × 麦金
   ========================================================================== */

:root {
  /* 明亮草绿底（浅一档） */
  --bg:        #0F8552;
  --bg-2:      #11925B;
  --bg-3:      #13A066;
  --panel:     rgba(255, 255, 255, .045);
  --panel-2:   rgba(255, 255, 255, .075);

  /* 霓虹 */
  --neon:      #2DE0B5;
  --neon-2:    #7CF7A0;
  --neon-deep: #0E9F8C;
  --gold:      #E3A82B;
  --gold-soft: #FFE1A3;

  /* 文字 */
  --text:      #FFFFFF;
  --text-dim:  #E9FAF1;
  --text-mute: #D9F2E6;

  /* 线与光 */
  --line:        rgba(45, 224, 181, .16);
  --line-strong: rgba(45, 224, 181, .38);
  --glow:        0 0 24px rgba(45, 224, 181, .22);
  --glow-strong: 0 0 42px rgba(45, 224, 181, .4);

  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 8px;

  --nav-h: 72px;
  --container: 1200px;

  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
          "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", "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(--text);
  background:
    radial-gradient(1000px 620px at 12% -8%, rgba(34, 197, 94, .32), transparent 62%),
    radial-gradient(900px 560px at 92% 8%, rgba(124, 247, 160, .2), transparent 60%),
    radial-gradient(800px 700px at 50% 105%, rgba(227, 168, 43, .07), transparent 65%),
    linear-gradient(180deg, #139B64 0%, #0F8552 45%, #0B6D44 100%);
  background-attachment: fixed;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

/* 全局科技网格 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(45, 224, 181, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 224, 181, .055) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 0%, transparent 78%);
  mask-image: radial-gradient(ellipse 120% 80% at 50% 0%, #000 0%, transparent 78%);
}

body > * { position: relative; z-index: 1; }

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

.container {
  width: min(var(--container), 92%);
  margin: 0 auto;
}

/* ---------------- 顶部导航 ---------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: background .3s ease, box-shadow .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(12, 102, 67, .88);
  backdrop-filter: blur(16px) saturate(160%);
  box-shadow: 0 8px 32px rgba(0, 0, 0, .5);
  border-bottom-color: var(--line);
}

.nav-inner {
  width: min(var(--container), 94%);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }

.brand-logo {
  width: 44px; height: 44px;
  flex: none;
  border-radius: 12px;
  background: rgba(45, 224, 181, .09);
  display: grid; place-items: center;
  box-shadow: inset 0 0 0 1px rgba(45, 224, 181, .2), 0 0 20px rgba(45, 224, 181, .14);
  transition: box-shadow .3s;
}
.brand:hover .brand-logo { box-shadow: inset 0 0 0 1px rgba(45, 224, 181, .38), 0 0 26px rgba(45, 224, 181, .26); }

.brand-logo svg, .brand-logo img { width: 36px; height: 36px; display: block; }

.brand-text { line-height: 1.25; min-width: 0; }
.brand-name {
  font-size: 17px;
  font-weight: 800;
  color: #fff;
  letter-spacing: .5px;
  white-space: nowrap;
}
.brand-sub {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--neon);
  letter-spacing: 1.6px;
  text-transform: uppercase;
  white-space: nowrap;
  opacity: .85;
}

.site-header.scrolled .brand-name { color: #fff; }

.nav-links { display: flex; align-items: center; gap: 4px; }

.nav-links a {
  padding: 8px 15px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(232, 243, 239, .82);
  transition: background .25s, color .25s, box-shadow .25s;
  white-space: nowrap;
}

.nav-links a:hover { background: rgba(45, 224, 181, .12); color: #fff; }

.nav-links a.active {
  background: rgba(45, 224, 181, .16);
  color: var(--neon);
  font-weight: 700;
  box-shadow: inset 0 0 0 1px var(--line-strong), 0 0 18px rgba(45, 224, 181, .2);
}

.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, .04);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--neon);
  position: relative;
  transition: background .25s;
}
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px; height: 2px;
  background: var(--neon);
  transition: transform .3s, top .3s;
}
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }

.site-header.menu-open .nav-toggle span { background: transparent; }
.site-header.menu-open .nav-toggle span::before { top: 0; transform: rotate(45deg); }
.site-header.menu-open .nav-toggle span::after { top: 0; transform: rotate(-45deg); }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .01em;
  color: #04120F;
  background: linear-gradient(120deg, var(--neon), #7CF7A8);
  box-shadow: 0 6px 20px rgba(45, 224, 181, .26);
  white-space: nowrap;
  transition: transform .25s, box-shadow .25s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 10px 28px rgba(45, 224, 181, .42); }
.nav-cta svg { width: 15px; height: 15px; flex: none; }

/* ---------------- Hero ---------------- */
.hero {
  position: relative;
  min-height: 94vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 56px) 0 84px;
  background:
    linear-gradient(100deg, rgba(8, 74, 49, .95) 0%, rgba(12, 102, 67, .82) 38%, rgba(34, 197, 94, .28) 72%, rgba(7, 70, 47, .72) 100%),
    url("../img/hero-harvest.webp") center 40% / cover no-repeat;
  overflow: hidden;
}

/* hero 顶部扫描线 */
.hero::before {
  content: "";
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon), transparent);
  opacity: .8;
  animation: scanX 6s linear infinite;
}

@keyframes scanX {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.hero::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg) 4%, rgba(12, 102, 67, .6) 45%, transparent);
  pointer-events: none;
}

.hero-inner { position: relative; z-index: 2; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(45, 224, 181, .08);
  backdrop-filter: blur(8px);
  color: var(--neon);
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 2px;
  margin-bottom: 26px;
  box-shadow: 0 0 24px rgba(45, 224, 181, .18);
}

.hero-eyebrow .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--neon-2);
  box-shadow: 0 0 10px var(--neon-2);
  animation: pulse 1.8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .45; transform: scale(.8); }
}

.hero h1 {
  color: #fff;
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1.26;
  font-weight: 900;
  letter-spacing: 1px;
  max-width: 15em;
  text-shadow: 0 0 48px rgba(45, 224, 181, .35);
}

.hero h1 .accent {
  background: linear-gradient(92deg, var(--neon-2), var(--neon) 45%, var(--gold-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  margin-top: 22px;
  max-width: 640px;
  color: rgba(232, 243, 239, .8);
  font-size: clamp(15px, 1.6vw, 17.5px);
}

.hero-actions { margin-top: 40px; display: flex; flex-wrap: wrap; gap: 16px; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 1px;
  border: none;
  cursor: pointer;
  transition: transform .25s, box-shadow .25s, background .25s;
}
.btn svg { width: 18px; height: 18px; }

.btn-primary {
  background: linear-gradient(135deg, var(--neon), var(--neon-deep));
  color: #04120F;
  box-shadow: 0 10px 30px rgba(45, 224, 181, .38);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 42px rgba(45, 224, 181, .55);
}

.btn-ghost {
  background: rgba(255, 255, 255, .06);
  border: 1.5px solid var(--line-strong);
  color: #fff;
  backdrop-filter: blur(8px);
}
.btn-ghost:hover { background: rgba(45, 224, 181, .14); transform: translateY(-3px); }

.btn-dark {
  background: rgba(45, 224, 181, .12);
  border: 1px solid var(--line-strong);
  color: var(--neon);
}
.btn-dark:hover {
  background: rgba(45, 224, 181, .22);
  transform: translateY(-3px);
  box-shadow: 0 0 28px rgba(45, 224, 181, .3);
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 3;
  color: var(--neon);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 3px;
  text-align: center;
  opacity: .8;
}
.hero-scroll::after {
  content: "";
  display: block;
  width: 1.5px; height: 32px;
  margin: 8px auto 0;
  background: linear-gradient(to bottom, var(--neon), transparent);
  animation: scrollHint 2s ease-in-out infinite;
}
@keyframes scrollHint {
  0%, 100% { transform: scaleY(.4); transform-origin: top; opacity: .4; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ---------------- 通用区块 ---------------- */
.section { padding: 100px 0; }
.section.alt {
  background: linear-gradient(180deg, rgba(14, 117, 77, .5), rgba(11, 100, 66, .42));
  border-block: 1px solid var(--line);
}
.section.tinted {
  background:
    radial-gradient(700px 380px at 20% 10%, rgba(45, 224, 181, .16), transparent 65%),
    rgba(14, 117, 77, .32);
  border-block: 1px solid var(--line);
}

.section-head { max-width: 780px; margin-bottom: 56px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--neon);
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 14px;
}
.eyebrow::before {
  content: "";
  width: 26px; height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
  box-shadow: 0 0 12px rgba(227, 168, 43, .6);
}

.section-title {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 900;
  color: #fff;
  line-height: 1.35;
  letter-spacing: .5px;
}
.section-title .accent {
  background: linear-gradient(92deg, var(--neon-2), var(--neon));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.section-desc { margin-top: 16px; color: var(--text-dim); font-size: 16px; }

/* ---------------- 统计数字条 ---------------- */
.stats-band {
  position: relative;
  padding: 68px 0;
  background:
    radial-gradient(900px 420px at 15% 0%, rgba(34, 197, 94, .45), transparent 62%),
    radial-gradient(800px 380px at 88% 100%, rgba(45, 224, 181, .3), transparent 62%),
    linear-gradient(180deg, rgba(12, 112, 74, .9), rgba(8, 84, 57, .95));
  border-block: 1px solid var(--line);
  overflow: hidden;
}

.stats-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(45, 224, 181, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 224, 181, .07) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.stats-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat .num {
  font-family: var(--mono);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(120deg, var(--neon-2), var(--neon));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 40px rgba(45, 224, 181, .35);
}
.stat .num small { font-size: .5em; font-weight: 700; margin-left: 2px; }
.stat .label {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-dim);
  letter-spacing: 1px;
}

/* ---------------- 卡片（玻璃科技风） ---------------- */
.grid { display: grid; gap: 24px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease, background .3s ease;
}

/* 卡片左上角角标 */
.card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 46px; height: 46px;
  border-top: 2px solid var(--line-strong);
  border-left: 2px solid var(--line-strong);
  border-top-left-radius: var(--radius-lg);
  opacity: .55;
  transition: opacity .3s;
}

.card:hover {
  transform: translateY(-6px);
  background: var(--panel-2);
  border-color: var(--line-strong);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .5), var(--glow);
}
.card:hover::before { opacity: 1; }

.card .icon {
  width: 54px; height: 54px;
  border-radius: 15px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(45, 224, 181, .2), rgba(124, 247, 160, .12));
  border: 1px solid var(--line);
  color: var(--neon);
  box-shadow: inset 0 0 18px rgba(45, 224, 181, .18);
}
.card .icon svg { width: 27px; height: 27px; }

.card h3 { font-size: 18.5px; font-weight: 800; color: #fff; margin-bottom: 10px; }
.card p { font-size: 14.5px; color: var(--text-dim); }

.card .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.card .tags span {
  font-size: 12.5px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(45, 224, 181, .1);
  color: var(--neon);
  border: 1px solid var(--line);
}

/* ---------------- 双栏图文 ---------------- */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
.split.rev > .split-media { order: 2; }

.split-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .6), var(--glow);
}

.split-media img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  transition: transform .6s ease;
  filter: saturate(1.05) contrast(1.05);
}
.split-media:hover img { transform: scale(1.05); }

/* 图片上方扫描光带 */
.split-media::after {
  content: "";
  position: absolute;
  left: 0; right: 0; top: -40%;
  height: 40%;
  background: linear-gradient(to bottom, transparent, rgba(45, 224, 181, .22), transparent);
  animation: scanDown 5.5s ease-in-out infinite;
  pointer-events: none;
}
@keyframes scanDown {
  0% { top: -40%; opacity: 0; }
  20% { opacity: 1; }
  80% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

.split-media .float-chip {
  position: absolute;
  left: 18px; bottom: 18px;
  z-index: 2;
  background: rgba(10, 90, 59, .8);
  backdrop-filter: blur(10px);
  color: #fff;
  padding: 10px 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  font-size: 13.5px;
  letter-spacing: 1px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.split-media .float-chip .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--neon-2);
  box-shadow: 0 0 10px var(--neon-2);
  animation: pulse 1.8s ease-in-out infinite;
}

.feature-list { margin-top: 28px; display: grid; gap: 18px; }

.feature-item { display: flex; gap: 16px; align-items: flex-start; }

.feature-item .fi-icon {
  width: 44px; height: 44px;
  flex: none;
  border-radius: 12px;
  background: rgba(45, 224, 181, .1);
  border: 1px solid var(--line);
  color: var(--neon);
  display: grid;
  place-items: center;
}
.feature-item .fi-icon svg { width: 22px; height: 22px; }
.feature-item h4 { font-size: 16.5px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.feature-item p { font-size: 14.5px; color: var(--text-dim); }

/* ---------------- 时间线（前世今生） ---------------- */
.timeline { position: relative; max-width: 900px; margin: 0 auto; }

.timeline::before {
  content: "";
  position: absolute;
  left: 26px; top: 8px; bottom: 8px;
  width: 2.5px;
  background: linear-gradient(to bottom, var(--neon-deep), var(--neon), var(--gold));
  border-radius: 2px;
  box-shadow: 0 0 18px rgba(45, 224, 181, .45);
}

.tl-item { position: relative; padding: 0 0 44px 76px; }
.tl-item:last-child { padding-bottom: 0; }

.tl-item::before {
  content: "";
  position: absolute;
  left: 15px; top: 8px;
  width: 24px; height: 24px;
  border-radius: 50%;
  background: var(--bg);
  border: 5px solid var(--neon-deep);
  box-shadow: 0 0 0 6px rgba(45, 224, 181, .14), 0 0 20px rgba(45, 224, 181, .5);
}
.tl-item.now::before { border-color: var(--gold-soft); box-shadow: 0 0 0 6px rgba(227, 168, 43, .18), 0 0 22px rgba(227, 168, 43, .5); }
.tl-item.future::before { border-color: var(--neon-2); box-shadow: 0 0 0 6px rgba(124, 247, 160, .16), 0 0 24px rgba(124, 247, 160, .5); }

.tl-item .tl-year {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--neon);
  background: rgba(45, 224, 181, .1);
  border: 1px solid var(--line);
  padding: 3px 14px;
  border-radius: 999px;
  margin-bottom: 10px;
}
.tl-item h3 { font-size: 21px; font-weight: 800; color: #fff; margin-bottom: 8px; }
.tl-item p { color: var(--text-dim); font-size: 15px; max-width: 640px; }

/* ---------------- 表格 ---------------- */
.table-wrap {
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  box-shadow: 0 14px 40px rgba(0, 0, 0, .4);
}

table.spec { width: 100%; border-collapse: collapse; min-width: 560px; }

table.spec th {
  text-align: left;
  background: linear-gradient(90deg, rgba(14, 159, 140, .3), rgba(45, 224, 181, .12));
  color: var(--neon);
  padding: 16px 22px;
  font-size: 15px;
  letter-spacing: 1px;
  border-bottom: 1px solid var(--line-strong);
}

table.spec td {
  padding: 14px 22px;
  border-bottom: 1px solid rgba(45, 224, 181, .1);
  font-size: 14.5px;
  color: var(--text-dim);
}
table.spec tr:last-child td { border-bottom: none; }
table.spec tr:nth-child(even) td { background: rgba(255, 255, 255, .025); }
table.spec td:first-child { font-weight: 700; color: #fff; white-space: nowrap; }

.table-note { margin-top: 14px; font-size: 13px; color: var(--text-mute); }

/* ---------------- 业务分类标签 ---------------- */
.biz-group-head { display: flex; align-items: center; gap: 14px; margin: 56px 0 24px; }
.biz-group-head:first-of-type { margin-top: 0; }
.biz-group-head .bar {
  width: 6px; height: 30px;
  border-radius: 4px;
  background: linear-gradient(to bottom, var(--neon), var(--gold));
  box-shadow: 0 0 14px rgba(45, 224, 181, .5);
}
.biz-group-head h2 { font-size: 24px; font-weight: 900; color: #fff; }
.biz-group-head .count {
  margin-left: auto;
  font-size: 13px;
  color: var(--neon);
  background: rgba(45, 224, 181, .1);
  border: 1px solid var(--line);
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------------- 页面横幅 ---------------- */
.page-hero {
  position: relative;
  padding: calc(var(--nav-h) + 88px) 0 76px;
  background:
    linear-gradient(105deg, rgba(8, 74, 49, .95) 0%, rgba(12, 102, 67, .84) 45%, rgba(14, 159, 140, .3) 100%),
    url("../img/hero-harvest.webp") center 30% / cover no-repeat;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon), transparent);
  opacity: .7;
  animation: scanX 7s linear infinite;
}
.page-hero::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 160px;
  background: linear-gradient(to top, var(--bg), transparent);
  pointer-events: none;
}
.page-hero.small-img { background-image: linear-gradient(105deg, rgba(8, 74, 49, .95) 0%, rgba(12, 102, 67, .84) 45%, rgba(14, 159, 140, .3) 100%), url("../img/claas-8700-livery.webp"); }
.page-hero.drone-bg { background-image: linear-gradient(105deg, rgba(8, 74, 49, .95) 0%, rgba(12, 102, 67, .84) 45%, rgba(14, 159, 140, .3) 100%), url("../img/drone.webp"); }
.page-hero.ai-bg { background-image: linear-gradient(105deg, rgba(8, 74, 49, .96) 0%, rgba(12, 102, 67, .86) 45%, rgba(14, 159, 140, .35) 100%), url("../img/ai-farm.webp"); }
.page-hero.case-bg { background-image: linear-gradient(105deg, rgba(8, 74, 49, .95) 0%, rgba(12, 102, 67, .84) 45%, rgba(14, 159, 140, .3) 100%), url("../img/case-center.webp"); }
.page-hero.apple-bg { background-image: linear-gradient(105deg, rgba(8, 74, 49, .95) 0%, rgba(12, 102, 67, .8) 42%, rgba(227, 168, 43, .22) 100%), url("../img/apple-orchard.webp"); }

.page-hero h1 {
  position: relative;
  z-index: 2;
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 900;
  letter-spacing: 1px;
  color: #fff;
  text-shadow: 0 0 42px rgba(45, 224, 181, .3);
}

.page-hero .crumbs {
  position: relative;
  z-index: 2;
  margin-top: 18px;
  font-size: 14px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.page-hero .crumbs a:hover { color: var(--neon); }

/* ---------------- 案例图片墙 ---------------- */
.case-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.case-tile {
  position: relative;
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-2);
  aspect-ratio: 4 / 3;
  transition: transform .35s ease, box-shadow .35s ease, border-color .35s ease;
}

.case-tile.wide { grid-column: span 2; aspect-ratio: 8 / 3; }

.case-tile img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .7s ease, filter .5s ease;
  filter: saturate(1.02) brightness(.92);
}

.case-tile:hover {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  box-shadow: 0 22px 56px rgba(0, 0, 0, .6), var(--glow);
}
.case-tile:hover img { transform: scale(1.08); filter: saturate(1.12) brightness(1.02); }

/* 图片遮罩渐变 + 信息浮层 */
.case-tile .case-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(8, 74, 49, .92) 6%, rgba(8, 74, 49, .35) 45%, transparent 72%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 22px;
  transition: background .35s;
}
.case-tile:hover .case-overlay { background: linear-gradient(to top, rgba(7, 72, 48, .95) 10%, rgba(10, 92, 59, .5) 55%, rgba(45, 224, 181, .1) 100%); }

.case-tag {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--neon);
  border: 1px solid var(--line-strong);
  background: rgba(10, 88, 57, .6);
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.case-tile h3 { color: #fff; font-size: 18px; font-weight: 800; line-height: 1.4; }
.case-tile p { margin-top: 6px; font-size: 13.5px; color: rgba(232, 243, 239, .72); }

.case-tile .case-meta {
  margin-top: 12px;
  display: flex;
  gap: 14px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--neon-2);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity .35s, transform .35s;
}
.case-tile:hover .case-meta { opacity: 1; transform: none; }

/* ---------------- 演进阶段条 ---------------- */
.evo-track {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
  box-shadow: 0 16px 44px rgba(0, 0, 0, .45);
}

.evo-step {
  position: relative;
  padding: 34px 30px 32px;
  border-right: 1px solid var(--line);
  transition: background .35s, box-shadow .35s;
}
.evo-step:last-child { border-right: none; }

/* 阶段之间的箭头 */
.evo-step:not(:last-child)::after {
  content: "";
  position: absolute;
  right: -9px; top: 50%;
  width: 18px; height: 18px;
  transform: translateY(-50%) rotate(45deg);
  background: linear-gradient(135deg, var(--neon), var(--neon-deep));
  border-top: 2px solid var(--bg);
  border-right: 2px solid var(--bg);
  z-index: 3;
  box-shadow: 0 0 16px rgba(45, 224, 181, .5);
}

.evo-step:hover { background: rgba(45, 224, 181, .08); }

.evo-num {
  font-family: var(--mono);
  font-size: 46px;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(180deg, var(--neon-2), var(--neon));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: .92;
}

.evo-step h3 { margin-top: 12px; font-size: 21px; font-weight: 800; color: #fff; }
.evo-step .evo-when { font-family: var(--mono); font-size: 12px; letter-spacing: 2px; color: var(--gold-soft); margin-top: 4px; }
.evo-step p { margin-top: 12px; font-size: 14.5px; color: var(--text-dim); }

.evo-step .evo-icon {
  width: 46px; height: 46px;
  border-radius: 13px;
  border: 1px solid var(--line);
  background: rgba(45, 224, 181, .1);
  color: var(--neon);
  display: grid;
  place-items: center;
  margin-bottom: 16px;
}
.evo-step .evo-icon svg { width: 24px; height: 24px; }

/* ---------------- 三段图文叙事 ---------------- */
.story-block {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 28px;
  background: var(--panel);
  box-shadow: 0 16px 44px rgba(0, 0, 0, .42);
  transition: border-color .35s, box-shadow .35s;
}
.story-block:hover { border-color: var(--line-strong); box-shadow: 0 20px 52px rgba(0, 0, 0, .55), var(--glow); }
.story-block.flip .story-media { order: 2; }

.story-media { position: relative; min-height: 340px; overflow: hidden; }
.story-media img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .7s ease;
}
.story-block:hover .story-media img { transform: scale(1.06); }

.story-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(8, 74, 49, .1) 0%, rgba(8, 74, 49, .55) 100%);
}
.story-block.flip .story-media::after { background: linear-gradient(255deg, rgba(8, 74, 49, .1) 0%, rgba(8, 74, 49, .55) 100%); }

.story-year {
  position: absolute;
  left: 24px; top: 24px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--neon);
  background: rgba(8, 74, 49, .78);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 6px 16px;
  backdrop-filter: blur(8px);
}

.story-body { padding: 42px 40px; display: flex; flex-direction: column; justify-content: center; }

.story-era {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 2px;
  color: #04120F;
  background: linear-gradient(135deg, var(--neon-2), var(--neon));
  border-radius: 999px;
  padding: 4px 16px;
  font-weight: 800;
  margin-bottom: 14px;
}
.story-era.gold { background: linear-gradient(135deg, var(--gold-soft), var(--gold)); }
.story-era.cyan { background: linear-gradient(135deg, var(--neon), var(--neon-deep)); color: #04120F; }

.story-body h3 { font-size: 26px; font-weight: 900; color: #fff; line-height: 1.35; }
.story-body p { margin-top: 14px; font-size: 15px; color: var(--text-dim); }

.story-facts { display: flex; flex-wrap: wrap; gap: 30px; margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--line); }
.story-facts strong {
  display: block;
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 900;
  color: var(--neon);
  line-height: 1.1;
}
.story-facts span { font-size: 12.5px; color: var(--text-mute); }

/* ---------------- 今昔对比 ---------------- */
.compare { display: grid; grid-template-columns: 1fr 66px 1fr; align-items: stretch; }

.compare-side {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  background: var(--panel);
}
.compare-side.old { background: linear-gradient(160deg, rgba(160, 170, 165, .07), rgba(255, 255, 255, .015)); }
.compare-side.new {
  background: linear-gradient(160deg, rgba(45, 224, 181, .16), rgba(255, 255, 255, .03));
  border-color: var(--line-strong);
  box-shadow: var(--glow);
}

.compare-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.compare-head svg { width: 22px; height: 22px; }
.compare-side.old .compare-head { color: var(--text-mute); }
.compare-side.new .compare-head { color: var(--neon); }
.compare-head h4 { font-size: 18px; font-weight: 800; color: #fff; }

.compare-row { display: flex; gap: 14px; padding: 12px 0; border-bottom: 1px dashed rgba(45, 224, 181, .14); }
.compare-row:last-child { border-bottom: none; }
.compare-row .k { width: 70px; flex: none; font-size: 12.5px; color: var(--text-mute); padding-top: 2px; }
.compare-row .v { font-size: 14.5px; color: var(--text-dim); }
.compare-side.new .compare-row .v { color: var(--text); }

.compare-vs { display: grid; place-items: center; }
.compare-vs span {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--neon);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  background: rgba(45, 224, 181, .1);
  box-shadow: var(--glow);
}

/* ---------------- 全产业链流程条 ---------------- */
.chain-flow {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
  box-shadow: 0 16px 44px rgba(0, 0, 0, .45);
}

.chain-node {
  position: relative;
  padding: 26px 16px;
  border-right: 1px solid var(--line);
  text-align: center;
  transition: background .35s;
}
.chain-node:last-child { border-right: none; }
.chain-node:hover { background: rgba(45, 224, 181, .08); }

.chain-dot {
  width: 38px; height: 38px;
  border-radius: 50%;
  margin: 0 auto 12px;
  background: linear-gradient(135deg, var(--neon-2), var(--neon-deep));
  color: #04120F;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-weight: 900;
  font-size: 14px;
  box-shadow: 0 0 18px rgba(45, 224, 181, .4);
}

.chain-node h4 { font-size: 15px; color: #fff; font-weight: 800; }
.chain-node p { font-size: 12.5px; color: var(--text-mute); margin-top: 6px; line-height: 1.6; }

/* 产品/品种图卡 */
.prod-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
  transition: transform .35s, box-shadow .35s, border-color .35s;
}
.prod-card:hover {
  transform: translateY(-6px);
  border-color: var(--line-strong);
  box-shadow: 0 20px 52px rgba(0, 0, 0, .5), var(--glow);
}
.prod-media { position: relative; height: 190px; overflow: hidden; }
.prod-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s ease; }
.prod-card:hover .prod-media img { transform: scale(1.07); }
.prod-media .prod-badge {
  position: absolute;
  left: 14px; top: 14px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 1.5px;
  color: var(--neon);
  background: rgba(8, 74, 49, .8);
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 4px 14px;
  backdrop-filter: blur(8px);
}
.prod-body { padding: 22px 22px 24px; }
.prod-body h3 { font-size: 18px; font-weight: 800; color: #fff; }
.prod-body .prod-sub { font-size: 13px; color: var(--gold-soft); margin-top: 4px; letter-spacing: 1px; }
.prod-body p { font-size: 14px; color: var(--text-dim); margin-top: 10px; }
.prod-spec { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.prod-spec span {
  font-size: 12px;
  padding: 3px 11px;
  border-radius: 999px;
  background: rgba(45, 224, 181, .1);
  border: 1px solid var(--line);
  color: var(--neon);
}

/* ---------------- 案例筛选栏 ---------------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

.filter-btn {
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dim);
  padding: 9px 22px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .04);
  cursor: pointer;
  transition: color .25s, border-color .25s, background .25s, box-shadow .25s;
}

.filter-btn:hover { color: #fff; border-color: var(--line-strong); background: rgba(45, 224, 181, .1); }

.filter-btn.active {
  color: #04120F;
  background: linear-gradient(135deg, var(--neon), var(--neon-deep));
  border-color: transparent;
  box-shadow: 0 0 22px rgba(45, 224, 181, .35);
}

.case-tile.hidden { display: none; }

/* ---------------- 联系页 ---------------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 32px; align-items: stretch; }

.contact-info-card {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(600px 320px at 12% 0%, rgba(14, 159, 140, .35), transparent 62%),
    linear-gradient(160deg, rgba(12, 107, 70, .9), rgba(8, 82, 54, .95));
  padding: 40px 36px;
  display: flex;
  flex-direction: column;
  gap: 26px;
  overflow: hidden;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .5);
}
.contact-info-card::before {
  content: "";
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(45, 224, 181, .06) 1px, transparent 1px);
  background-size: 100% 32px;
  pointer-events: none;
}
.contact-info-card > * { position: relative; }
.contact-info-card h3 { font-size: 22px; font-weight: 800; color: #fff; }

.ci-item { display: flex; gap: 14px; align-items: flex-start; }
.ci-item .ci-icon {
  width: 42px; height: 42px;
  flex: none;
  border-radius: 11px;
  background: rgba(45, 224, 181, .1);
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
}
.ci-item .ci-icon svg { width: 20px; height: 20px; color: var(--neon); }
.ci-item .ci-label { font-family: var(--mono); font-size: 11.5px; letter-spacing: 1.5px; color: var(--neon); }
.ci-item .ci-value { font-size: 16px; font-weight: 600; color: #fff; margin-top: 2px; }

.contact-form-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  backdrop-filter: blur(12px);
  box-shadow: 0 18px 50px rgba(0, 0, 0, .45);
}

.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-field { display: flex; flex-direction: column; gap: 8px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 14px; font-weight: 700; color: #fff; }
.form-field label .req { color: #FF7A6B; margin-left: 2px; }

.form-field input,
.form-field select,
.form-field textarea {
  font-family: var(--font);
  font-size: 15px;
  color: var(--text);
  padding: 12px 16px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .04);
  outline: none;
  transition: border-color .25s, background .25s, box-shadow .25s;
}
.form-field textarea { resize: vertical; min-height: 120px; }
.form-field select option { background: var(--bg-3); color: var(--text); }
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-mute); }

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--neon);
  background: rgba(45, 224, 181, .06);
  box-shadow: 0 0 0 4px rgba(45, 224, 181, .14);
}

.form-tip { font-size: 12.5px; color: var(--text-mute); }

.form-status { display: none; margin-top: 16px; padding: 12px 18px; border-radius: var(--radius-sm); font-size: 14.5px; }
.form-status.ok { display: block; background: rgba(45, 224, 181, .12); border: 1px solid var(--line-strong); color: var(--neon); }
.form-status.err { display: block; background: rgba(255, 138, 138, .12); border: 1px solid rgba(255, 138, 138, .35); color: #FFA6A6; }
.form-status.warn { display: block; background: rgba(227, 168, 43, .14); border: 1px solid rgba(227, 168, 43, .38); color: #F0C464; }

/* ---------------- CTA 横条 ---------------- */
.cta-band {
  position: relative;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(700px 320px at 88% 20%, rgba(227, 168, 43, .22), transparent 62%),
    radial-gradient(600px 300px at 8% 90%, rgba(45, 224, 181, .28), transparent 62%),
    linear-gradient(140deg, rgba(13, 112, 74, .95), rgba(8, 82, 54, .95));
  padding: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .5), 0 0 60px rgba(45, 224, 181, .08);
}
.cta-band::before {
  content: "";
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(45, 224, 181, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 224, 181, .07) 1px, transparent 1px);
  background-size: 42px 42px;
  pointer-events: none;
}
.cta-band > * { position: relative; }
.cta-band h2 { font-size: clamp(22px, 3vw, 30px); font-weight: 900; color: #fff; letter-spacing: 1px; }
.cta-band p { margin-top: 10px; color: var(--text-dim); font-size: 15.5px; }
.cta-band .cta-tel { margin-top: 8px; font-size: 14.5px; }
.cta-band .cta-tel a { color: var(--neon); font-weight: 700; }

/* ---------------- 页脚 ---------------- */
.site-footer {
  background: linear-gradient(180deg, rgba(12, 102, 67, .6), rgba(8, 74, 49, .95));
  border-top: 1px solid var(--line);
  padding: 72px 0 0;
  margin-top: 100px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}

.footer-brand .brand-name { color: #fff; font-size: 19px; }
.footer-brand p { margin-top: 16px; font-size: 14px; color: var(--text-mute); max-width: 340px; }

.site-footer h4 { color: #fff; font-size: 16px; font-weight: 700; letter-spacing: 1px; margin-bottom: 18px; }
.site-footer ul { display: grid; gap: 10px; }
.site-footer ul a { font-size: 14px; color: var(--text-mute); transition: color .2s; }
.site-footer ul a:hover { color: var(--neon); }

.footer-contact li { display: flex; gap: 10px; font-size: 14px; color: var(--text-mute); }
.footer-contact svg { width: 16px; height: 16px; flex: none; margin-top: 4px; color: var(--neon); }

.footer-bottom {
  border-top: 1px solid rgba(45, 224, 181, .12);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-mute);
}

/* ---------------- 返回顶部 ---------------- */
.back-top {
  position: fixed;
  right: 28px; bottom: 28px;
  width: 48px; height: 48px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(12, 107, 70, .9);
  color: var(--neon);
  cursor: pointer;
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity .3s, transform .3s, background .3s, box-shadow .3s;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .5);
  z-index: 900;
  backdrop-filter: blur(10px);
}
.back-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-top:hover { background: rgba(45, 224, 181, .18); box-shadow: var(--glow-strong); }
.back-top svg { width: 20px; height: 20px; }

/* ---------------- 滚动揭示动画 ---------------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .1s; }
.reveal[data-delay="2"] { transition-delay: .2s; }
.reveal[data-delay="3"] { transition-delay: .3s; }
.reveal[data-delay="4"] { transition-delay: .4s; }

/* ---------------- 响应式 ---------------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .case-gallery { grid-template-columns: repeat(2, 1fr); }
  .case-tile.wide { grid-column: span 2; aspect-ratio: 4 / 3; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .split.rev > .split-media { order: 0; }
  .split-media img { height: 340px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(9, 78, 52, .97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--line);
    padding: 18px 6% 26px;
    gap: 6px;
    transform: translateY(-130%);
    opacity: 0;
    pointer-events: none;
    transition: transform .35s ease, opacity .35s ease;
    box-shadow: 0 24px 60px rgba(0, 0, 0, .6);
    z-index: -1;
  }
  .site-header.menu-open .nav-links { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 13px 18px; font-size: 16px; }
  .nav-cta { padding: 8px 13px; font-size: 13px; gap: 5px; }

  .brand-name { font-size: 15px; }
  .brand-sub { display: none; }

  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; }
  .section { padding: 68px 0; }

  /* 演进条改为纵向 */
  .evo-track { grid-template-columns: 1fr; }
  .evo-step { border-right: none; border-bottom: 1px solid var(--line); }
  .evo-step:last-child { border-bottom: none; }
  .evo-step:not(:last-child)::after {
    right: 50%; top: auto; bottom: -9px;
    transform: translateX(50%) rotate(135deg);
  }

  /* 叙事块改为单列 */
  .story-block { grid-template-columns: 1fr; }
  .story-block.flip .story-media { order: 0; }
  .story-media { min-height: 240px; }
  .story-body { padding: 32px 26px; }
  .story-body h3 { font-size: 22px; }

  /* 今昔对比改为上下 */
  .compare { grid-template-columns: 1fr; gap: 18px; }
  .compare-vs { display: none; }

  /* 产业链流程改为三列两行 */
  .chain-flow { grid-template-columns: repeat(3, 1fr); }
  .chain-node:nth-child(3) { border-right: none; }
  .chain-node:nth-child(n+4) { border-top: 1px solid var(--line); }
}

@media (max-width: 640px) {
  .chain-flow { grid-template-columns: repeat(2, 1fr); }
  .chain-node { border-right: 1px solid var(--line); }
  .chain-node:nth-child(2n) { border-right: none; }
  .chain-node:nth-child(n+3) { border-top: 1px solid var(--line); }
}

@media (max-width: 560px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .case-gallery { grid-template-columns: 1fr; }
  .case-tile.wide { grid-column: span 1; }
  .form-grid { grid-template-columns: 1fr; }
  .split-media img { height: 260px; }
  .cta-band { padding: 40px 28px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { justify-content: center; text-align: center; }
  .hero { min-height: 88vh; }
  .timeline::before { left: 8px; }
  .tl-item { padding-left: 44px; }
  .tl-item::before { left: -3px; }
}

/* ================= 留言管理后台 ================= */
/* hidden 属性必须最高优先级生效（防止被 .admin-login 的 display:flex 覆盖） */
[hidden] { display: none !important; }

.admin-wrap { min-height: 100vh; display: flex; flex-direction: column; }

.admin-top {
  position: sticky; top: 0; z-index: 50;
  background: rgba(9, 78, 52, .92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.admin-top-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 22px; }
.admin-top-right { display: flex; gap: 10px; align-items: center; }
.admin-top .btn { padding: 9px 16px; font-size: 14px; }

.admin-main { flex: 1; padding: 40px 22px 80px; }

.admin-login { display: flex; justify-content: center; padding-top: 40px; }
.admin-login-card { max-width: 460px; width: 100%; padding: 38px 34px; }
.admin-login-card code {
  font-family: var(--mono);
  background: rgba(45, 224, 181, .12);
  color: var(--neon);
  padding: 1px 6px; border-radius: 5px; font-size: 12.5px;
}

.admin-stats { margin-bottom: 28px; grid-template-columns: repeat(5, 1fr); }
.admin-stats .stat .num { font-size: clamp(26px, 3vw, 38px); }
@media (max-width: 1100px) { .admin-stats { grid-template-columns: repeat(3, 1fr); } }

.admin-toolbar { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.admin-toolbar input[type="search"],
.admin-toolbar select {
  background: var(--panel);
  border: 1px solid var(--line);
  color: #fff;
  border-radius: 10px;
  padding: 11px 14px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
}
.admin-toolbar input[type="search"] { flex: 1; min-width: 220px; }
.admin-toolbar input[type="search"]:focus,
.admin-toolbar select:focus { border-color: var(--neon); box-shadow: 0 0 0 3px rgba(45, 224, 181, .12); }
/* 原生下拉菜单（Windows 白底问题）：强制深色底 + 亮色文字 */
.admin-toolbar select option {
  background: #0F8555;
  color: #E8F3EF;
  font-family: inherit;
}
.admin-toolbar select option:checked,
.admin-toolbar select option:hover { background: #12332B; color: #fff; }
.admin-toolbar .btn { padding: 11px 18px; font-size: 14px; }

.admin-table table { min-width: 900px; }
.admin-table td { vertical-align: top; line-height: 1.65; }
.admin-table .admin-note { margin-top: 8px; font-size: 13px; color: var(--gold-soft); }

.admin-badge {
  display: inline-block; padding: 4px 12px; border-radius: 999px;
  font-size: 12.5px; font-weight: 700; white-space: nowrap;
}
.admin-badge.new { background: #33270B; color: #FFD98A; border: 1px solid rgba(227, 168, 43, .55); }
.admin-badge.done { background: #0B3A30; color: #4BEBBF; border: 1px solid rgba(45, 224, 181, .55); }
.admin-badge.del { background: #3B1416; color: #FF9E9E; border: 1px solid rgba(255, 138, 138, .55); }

/* 回收站行：整体淡化 */
tr.row-deleted td { opacity: .62; font-style: italic; }
.admin-delat { margin-top: 4px; font-size: 12px; color: #FF9E9E; font-style: normal; }

.admin-act {
  background: rgba(255, 255, 255, .06);
  border: 1px solid var(--line);
  color: var(--text-dim);
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12.5px;
  cursor: pointer;
  margin: 0 6px 6px 0;
  transition: all .2s ease;
  font-family: inherit;
}
.admin-act:hover { color: var(--neon); border-color: var(--neon); background: rgba(45, 224, 181, .1); }
.admin-act.danger:hover { color: #FF8A8A; border-color: #FF8A8A; background: rgba(255, 138, 138, .1); }

@media (max-width: 860px) {
  .admin-top-inner { padding: 12px 16px; }
  .admin-top .brand-name { font-size: 15px; }
  .admin-main { padding: 28px 16px 60px; }
  .admin-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ==========================================================================
   技术交流 · 农智答 AI 问答
   ========================================================================== */

.page-hero.exchange-bg {
  background-image:
    linear-gradient(105deg, rgba(8, 74, 49, .96) 0%, rgba(12, 102, 67, .86) 45%, rgba(14, 159, 140, .32) 100%),
    url("../img/case-iot.webp");
}

.ai-chat-card {
  position: relative;
  padding: 26px 28px 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(620px 320px at 88% -10%, rgba(45, 224, 181, .12), transparent 65%),
    linear-gradient(180deg, rgba(12, 100, 66, .92), rgba(10, 88, 57, .78));
  box-shadow: 0 26px 60px rgba(0, 0, 0, .38);
}

.ai-chat-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.ai-avatar {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  color: #04120E;
  background: linear-gradient(140deg, var(--neon-2), var(--neon));
  box-shadow: 0 0 22px rgba(45, 224, 181, .38);
  flex: none;
}
.ai-avatar svg { width: 22px; height: 22px; }

.ai-name {
  display: flex; align-items: center; gap: 10px;
  font-size: 17px; font-weight: 900; color: #fff; letter-spacing: .5px;
}
.ai-badge {
  font-size: 11px; font-weight: 700; letter-spacing: .5px;
  padding: 2px 9px; border-radius: 999px;
  color: var(--neon); background: rgba(45, 224, 181, .14);
  border: 1px solid rgba(45, 224, 181, .4);
}
.ai-sub { font-size: 12.5px; color: var(--text-mute); margin-top: 2px; }

.ai-status {
  margin-left: auto;
  display: flex; align-items: center; gap: 7px;
  font-size: 12.5px; color: var(--neon); font-weight: 700;
}
.ai-status .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 10px var(--neon);
  animation: aiPulse 1.8s ease-in-out infinite;
}
@keyframes aiPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .35; transform: scale(.8); }
}

.chat-log {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px 2px;
  max-height: 460px;
  overflow-y: auto;
  overscroll-behavior: contain;
  scroll-behavior: smooth;
}
.chat-log::-webkit-scrollbar { width: 6px; }
.chat-log::-webkit-scrollbar-thumb { background: rgba(45, 224, 181, .28); border-radius: 6px; }
.chat-log::-webkit-scrollbar-track { background: transparent; }

.bubble {
  max-width: 84%;
  padding: 14px 18px;
  border-radius: 16px;
  font-size: 15px;
  line-height: 1.8;
  white-space: pre-wrap;
  word-break: break-word;
}
.bubble-ai {
  align-self: flex-start;
  color: var(--text);
  background: rgba(255, 255, 255, .055);
  border: 1px solid var(--line);
  border-top-left-radius: 5px;
}
.bubble-user {
  align-self: flex-end;
  color: #fff;
  background: linear-gradient(135deg, rgba(45, 224, 181, .2), rgba(14, 159, 140, .14));
  border: 1px solid rgba(45, 224, 181, .38);
  border-top-right-radius: 5px;
}
.bubble-error {
  align-self: flex-start;
  color: #FFD9D9;
  background: #3B1416;
  border: 1px solid rgba(255, 138, 138, .5);
  border-top-left-radius: 5px;
}
.bubble-hint { margin-top: 8px; font-size: 13px; color: #FFB3B3; }
.bubble-hint a { color: var(--gold-soft); font-weight: 700; }
.bubble-text strong { color: var(--neon); font-weight: 800; }
.bubble em { color: var(--gold-soft); font-style: normal; }

.caret {
  display: inline-block;
  width: 8px; height: 15px;
  margin-left: 3px;
  vertical-align: -2px;
  background: var(--neon);
  animation: caretBlink 1s steps(1) infinite;
}
@keyframes caretBlink { 50% { opacity: 0; } }

.typing { display: inline-flex; gap: 5px; align-items: center; height: 18px; }
.typing i {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--neon); opacity: .3;
  animation: typingDot 1.2s infinite;
}
.typing i:nth-child(2) { animation-delay: .18s; }
.typing i:nth-child(3) { animation-delay: .36s; }
@keyframes typingDot {
  0%, 60%, 100% { opacity: .25; transform: translateY(0); }
  30% { opacity: 1; transform: translateY(-4px); }
}

.chat-input-bar {
  display: flex;
  align-items: flex-end;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.chat-input-bar textarea {
  flex: 1;
  min-height: 58px;
  max-height: 150px;
  padding: 14px 16px;
  resize: vertical;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .05);
  color: var(--text);
  font-family: inherit;
  font-size: 15px;
  line-height: 1.7;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.chat-input-bar textarea::placeholder { color: var(--text-mute); }
.chat-input-bar textarea:focus {
  outline: none;
  border-color: var(--neon);
  box-shadow: 0 0 0 3px rgba(45, 224, 181, .12);
}
.chat-input-bar textarea:disabled { opacity: .5; cursor: not-allowed; }
.chat-input-bar .btn { min-width: 132px; justify-content: center; }
.btn:disabled { opacity: .55; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

.shake { animation: shakeX .42s ease; }
@keyframes shakeX {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  50% { transform: translateX(6px); }
  75% { transform: translateX(-3px); }
}

.chat-tips-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }
.chip {
  font-size: 13px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .03);
  color: var(--text-dim);
  cursor: pointer;
  transition: all .2s ease;
  user-select: none;
}
.chip:hover {
  color: #04120E;
  background: var(--neon);
  border-color: var(--neon);
  box-shadow: var(--glow);
  transform: translateY(-2px);
}

.ai-disclaimer {
  margin-top: 16px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--text-mute);
}
.ai-disclaimer a { color: var(--gold-soft); font-weight: 700; }

.ai-notice {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 20px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(227, 168, 43, .45);
  background: rgba(227, 168, 43, .09);
  color: var(--gold-soft);
  font-size: 14px;
  line-height: 1.75;
}
.ai-notice strong { font-size: 15px; color: #FFD98A; }
.ai-notice a { color: var(--neon); font-weight: 700; }

.qa-list { display: flex; flex-direction: column; gap: 12px; }
.qa-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, .035);
  overflow: hidden;
  transition: border-color .2s ease, background .2s ease;
}
.qa-item:hover { border-color: var(--line-strong); }
.qa-item[open] { background: rgba(45, 224, 181, .055); border-color: var(--line-strong); }
.qa-item summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
}
.qa-item summary::-webkit-details-marker { display: none; }
.qa-item summary::after {
  content: "+";
  flex: none;
  width: 22px; text-align: center;
  font-size: 20px; line-height: 1;
  color: var(--neon); font-weight: 400;
}
.qa-item[open] summary::after { content: "−"; }
.qa-q { flex: 1; font-size: 15.5px; font-weight: 700; color: var(--text); }
.qa-meta { flex: none; font-size: 12px; color: var(--text-mute); font-family: var(--mono); }
.qa-a {
  padding: 14px 20px 18px;
  border-top: 1px dashed var(--line);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
  white-space: pre-wrap;
  word-break: break-word;
}
.qa-a strong { color: var(--neon); }
.qa-empty {
  padding: 34px 20px;
  text-align: center;
  color: var(--text-mute);
  font-size: 14.5px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
}

@media (max-width: 760px) {
  .ai-chat-card { padding: 20px 18px 18px; }
  .ai-chat-head { flex-wrap: wrap; }
  .ai-status { margin-left: 0; }
  .bubble { max-width: 94%; font-size: 14.5px; }
  .chat-log { max-height: 400px; }
  .chat-input-bar { flex-direction: column; align-items: stretch; }
  .chat-input-bar .btn { width: 100%; }
  .qa-item summary { padding: 14px 16px; gap: 10px; }
  .qa-meta { display: none; }
  .qa-a { padding: 12px 16px 16px; }
}

/* 后台：技术交流问答记录 */
.admin-sub-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin: 46px 0 14px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.admin-sub-title { font-size: 18px; font-weight: 900; color: #fff; letter-spacing: .5px; }
.admin-sub-hint { font-size: 13px; color: var(--text-mute); }
.qa-cell {
  max-width: 420px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-dim);
  white-space: pre-wrap;
  word-break: break-word;
}

/* 技术交流页：卡片序号 / 移动端换行控制 */
.card-num {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--neon);
  opacity: .85;
  margin-bottom: 8px;
}
.desktop-br { display: inline; }
@media (max-width: 760px) {
  .desktop-br { display: none; }
}

/* 后台：技术交流开放开关 */
.admin-switch {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 18px 22px;
  margin-bottom: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background:
    radial-gradient(420px 160px at 92% -20%, rgba(45, 224, 181, .12), transparent 70%),
    rgba(255, 255, 255, .04);
}
.admin-switch-info { min-width: 240px; flex: 1; }
.admin-switch-title { font-size: 16px; font-weight: 900; color: #fff; letter-spacing: .4px; }
.admin-switch-desc { margin-top: 4px; font-size: 13px; color: var(--text-dim); line-height: 1.7; }
.admin-switch-right { display: flex; align-items: center; gap: 14px; flex: none; }
.admin-switch-label { font-size: 13.5px; font-weight: 800; white-space: nowrap; }
.admin-switch-label.on { color: var(--neon); }
.admin-switch-label.off { color: var(--text-mute); }

.switch { position: relative; display: inline-block; width: 54px; height: 30px; flex: none; }
.switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.switch-slider {
  position: absolute; inset: 0;
  border-radius: 999px;
  background: #26332F;
  border: 1px solid rgba(255, 255, 255, .14);
  cursor: pointer;
  transition: background .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.switch-slider::before {
  content: "";
  position: absolute;
  width: 22px; height: 22px;
  left: 3px; top: 3px;
  border-radius: 50%;
  background: #93AAA3;
  transition: transform .25s ease, background .25s ease;
}
.switch input:checked + .switch-slider {
  background: rgba(45, 224, 181, .26);
  border-color: rgba(45, 224, 181, .62);
  box-shadow: 0 0 18px rgba(45, 224, 181, .26);
}
.switch input:checked + .switch-slider::before {
  transform: translateX(24px);
  background: var(--neon);
}
.switch input:focus-visible + .switch-slider { outline: 2px solid var(--neon); outline-offset: 2px; }
.switch input:disabled + .switch-slider { opacity: .55; cursor: progress; }

/* 技术交流关闭态提示（与"接入中"区分） */
.ai-notice.closed {
  border-color: rgba(147, 170, 163, .42);
  background: rgba(147, 170, 163, .07);
  color: var(--text-dim);
}
.ai-notice.closed strong { color: #C9D8D3; }

/* 技术交流关闭：直接收起对话卡，只留提示 */
.ai-chat-card.is-closed { display: none; }
.ai-notice.closed { padding: 24px 26px; font-size: 14.5px; }

/* 后台：大模型设置面板 */
.admin-ai {
  padding: 20px 22px 22px;
  margin-bottom: 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .035);
}
.admin-ai-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 18px;
}
.ai-grid .full { grid-column: 1 / -1; }
.ai-grid .form-field label { font-size: 13px; }
.ai-grid input,
.ai-grid select {
  width: 100%;
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .05);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
}
.ai-grid input::placeholder { color: var(--text-mute); }
.ai-grid input:focus,
.ai-grid select:focus {
  outline: none;
  border-color: var(--neon);
  box-shadow: 0 0 0 3px rgba(45, 224, 181, .12);
}
.ai-grid select option { background: #0F8555; color: #E8F3EF; }
.field-hint { font-size: 12px; color: var(--text-mute); line-height: 1.6; }
.ai-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}
.ai-status { font-size: 13px; color: var(--text-dim); line-height: 1.6; }
.ai-status.ok { color: var(--neon); }
.ai-status.err { color: #FF9E9E; }

@media (max-width: 760px) {
  .ai-grid { grid-template-columns: 1fr; }
  .admin-ai { padding: 18px 16px; }
  .ai-actions .btn { flex: 1; justify-content: center; }
}

/* 提问输入区下方提示（回车发送 / 校验提示） */
.chat-hint {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-mute);
}
.chat-hint.err { color: #FFB3B3; font-weight: 600; }
.chat-hint.ok { color: #9CE6B8; font-weight: 600; }