/* ===== Pivot 生鲜数字化AI终端 · 营销官网 ===== */
:root {
  --green-950: #06180f;
  --green-900: #0a2418;
  --green-800: #0f3524;
  --green-700: #14532d;
  --green-500: #16a34a;
  --green-400: #22c55e;
  --green-300: #4ade80;
  --mint: #34d399;
  --orange: #f97316;
  --amber: #fbbf24;
  --ink: #101c15;
  --paper: #f6faf7;
  --muted: #5b6f63;
  --line: rgba(20, 83, 45, .12);
  --radius: 16px;
  --shadow: 0 12px 40px rgba(6, 24, 15, .12);
  font-size: 16px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ===== 导航 ===== */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .3s, box-shadow .3s;
}
.nav.scrolled {
  background: rgba(6, 24, 15, .92);
  backdrop-filter: blur(12px);
  box-shadow: 0 4px 24px rgba(0, 0, 0, .25);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, var(--green-400), var(--mint));
  color: var(--green-950); font-weight: 800; font-size: 20px;
  display: grid; place-items: center;
}
.brand-text { font-weight: 700; letter-spacing: .5px; }
.brand-text em { font-style: normal; font-weight: 400; opacity: .75; margin-left: 2px; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a { color: rgba(255, 255, 255, .85); font-size: 15px; transition: color .2s; }
.nav-links a:hover { color: var(--green-300); }
.nav-cta {
  padding: 8px 18px; border-radius: 999px;
  background: var(--green-500); color: #fff !important; font-weight: 600;
}
.nav-cta:hover { background: var(--green-400); }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; flex-direction: column; gap: 5px; }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; }

/* ===== Hero ===== */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; color: #fff; }
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  transform: scale(1.05);
  animation: heroZoom 18s ease-out forwards;
}
@keyframes heroZoom { to { transform: scale(1); } }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(6, 24, 15, .94) 25%, rgba(6, 24, 15, .55) 60%, rgba(6, 24, 15, .25));
}
.hero-content { position: relative; padding-top: 110px; padding-bottom: 80px; }
.hero-eyebrow {
  font-size: 13px; letter-spacing: 3px; color: var(--green-300);
  text-transform: uppercase; margin-bottom: 18px; font-weight: 600;
}
.hero h1 { font-size: clamp(40px, 6.5vw, 72px); font-weight: 800; line-height: 1.15; letter-spacing: 2px; }
.hl {
  background: linear-gradient(90deg, var(--green-300), var(--mint));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-slogan { font-size: clamp(20px, 2.6vw, 30px); margin-top: 14px; font-weight: 600; color: #e9f7ee; }
.hero-sub { margin-top: 16px; color: rgba(255, 255, 255, .78); font-size: 17px; }
.hero-actions { display: flex; gap: 16px; margin-top: 36px; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: 14px 32px; border-radius: 999px;
  font-weight: 700; font-size: 16px; transition: transform .2s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--green-500), var(--mint));
  color: #fff; box-shadow: 0 8px 28px rgba(34, 197, 94, .4);
}
.btn-primary:hover { box-shadow: 0 12px 34px rgba(34, 197, 94, .55); }
.btn-ghost { border: 1.5px solid rgba(255, 255, 255, .5); color: #fff; }
.btn-ghost:hover { border-color: var(--green-300); color: var(--green-300); }
.btn-lg { font-size: 18px; padding: 16px 40px; }
.hero-stats { display: flex; gap: 48px; margin-top: 56px; flex-wrap: wrap; }
.hstat strong { display: block; font-size: 34px; font-weight: 800; color: var(--green-300); }
.hstat span { font-size: 13px; color: rgba(255, 255, 255, .65); max-width: 190px; display: inline-block; line-height: 1.5; }
.hero-scroll {
  position: absolute; bottom: 24px; left: 50%; transform: translateX(-50%);
  font-size: 34px; color: rgba(255, 255, 255, .6); animation: bob 1.8s infinite;
}
@keyframes bob { 50% { transform: translate(-50%, 8px); } }

/* ===== 通用 Section ===== */
.section { padding: 110px 0; }
.section-dark {
  background:
    radial-gradient(1000px 500px at 85% -10%, rgba(34, 197, 94, .12), transparent),
    linear-gradient(180deg, var(--green-950), var(--green-900));
  color: #eaf5ee;
}
.sec-eyebrow {
  font-size: 13px; letter-spacing: 3px; font-weight: 700;
  color: var(--green-500); text-transform: uppercase; margin-bottom: 10px;
}
.section-dark .sec-eyebrow { color: var(--green-300); }
.sec-title { font-size: clamp(28px, 4vw, 42px); font-weight: 800; letter-spacing: 1px; }
.sec-lead { margin-top: 16px; max-width: 720px; color: var(--muted); font-size: 17px; }
.section-dark .sec-lead { color: rgba(234, 245, 238, .7); }

.grid { display: grid; gap: 24px; margin-top: 48px; }
.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 {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; box-shadow: var(--shadow);
  transition: transform .25s, box-shadow .25s;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 20px 50px rgba(6, 24, 15, .18); }

/* 痛点 */
.pain-card .card-num {
  font-size: 40px; font-weight: 800; color: transparent;
  -webkit-text-stroke: 1.5px var(--green-400); margin-bottom: 12px;
}
.pain-card h3 { font-size: 21px; margin-bottom: 10px; }
.pain-card p { color: var(--muted); font-size: 15px; }
.pain-bridge {
  margin-top: 56px; display: flex; align-items: center; justify-content: center;
  gap: 18px; flex-wrap: wrap;
}
.bridge-tag { padding: 10px 22px; border-radius: 999px; font-weight: 700; }
.bridge-tag.old { background: #e8e5df; color: #7a756a; }
.bridge-tag.new { background: linear-gradient(135deg, var(--green-500), var(--mint)); color: #fff; }
.bridge-item {
  padding: 8px 18px; border-radius: 999px; font-size: 14px; font-weight: 600;
  border: 1.5px dashed var(--green-500); color: var(--green-700);
}
.bridge-arrow { color: var(--green-500); font-weight: 800; font-size: 20px; }

/* 产品三层架构 */
.layers { margin-top: 56px; display: flex; flex-direction: column; gap: 22px; }
.layer {
  display: flex; gap: 28px; background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(74, 222, 128, .18); border-radius: var(--radius);
  padding: 30px 32px; transition: border-color .25s, background .25s;
}
.layer:hover { border-color: rgba(74, 222, 128, .5); background: rgba(255, 255, 255, .08); }
.layer-label {
  flex: 0 0 auto; writing-mode: vertical-rl; letter-spacing: 4px;
  font-size: 13px; font-weight: 700; color: var(--green-300);
  border-right: 2px solid rgba(74, 222, 128, .35); padding-right: 14px;
}
.layer-body h3 { font-size: 20px; margin-bottom: 16px; color: #fff; }
.spec-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.spec {
  background: rgba(6, 24, 15, .5); border-radius: 10px; padding: 14px 16px;
  border: 1px solid rgba(74, 222, 128, .12);
}
.spec strong { display: block; color: var(--green-300); font-size: 15px; margin-bottom: 4px; }
.spec span { font-size: 13px; color: rgba(234, 245, 238, .65); }
.chip-row { display: flex; flex-wrap: wrap; gap: 12px; }
.chip {
  padding: 10px 18px; border-radius: 12px; background: rgba(6, 24, 15, .5);
  border: 1px solid rgba(74, 222, 128, .2); font-weight: 600; font-size: 15px;
}
.chip small { display: block; font-weight: 400; font-size: 12px; color: rgba(234, 245, 238, .55); }
.layer-note { margin-top: 14px; font-size: 14px; color: rgba(234, 245, 238, .55); }
.interact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.interact {
  background: rgba(6, 24, 15, .5); border-radius: 10px; padding: 16px;
  border: 1px solid rgba(74, 222, 128, .12);
}
.interact h4 { color: var(--mint); font-size: 16px; margin-bottom: 6px; }
.interact p { font-size: 13px; color: rgba(234, 245, 238, .62); }

.product-gallery {
  margin-top: 56px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.product-gallery figure {
  border-radius: var(--radius); overflow: hidden; position: relative;
  border: 1px solid rgba(74, 222, 128, .2);
}
.product-gallery img { height: 240px; width: 100%; object-fit: cover; transition: transform .5s; }
.product-gallery figure:hover img { transform: scale(1.06); }
.product-gallery figcaption {
  position: absolute; inset: auto 0 0 0; padding: 24px 16px 12px;
  background: linear-gradient(transparent, rgba(6, 24, 15, .9));
  font-size: 13px; color: rgba(255, 255, 255, .9);
}

/* 产品参数 */
.spec-table {
  margin-top: 48px; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid var(--line);
}
.spec-row {
  display: grid; grid-template-columns: 160px 1.1fr 1.2fr;
  background: #fff; border-top: 1px solid var(--line);
  transition: background .2s;
}
.spec-row:hover { background: #f4fbf6; }
.spec-row > div { padding: 18px 22px; font-size: 15px; }
.spec-row > div:first-child { font-weight: 700; color: var(--green-700); }
.spec-row > div:nth-child(2) { color: var(--ink); }
.spec-row .gain { color: var(--muted); background: #f0faf3; }
.spec-head { background: var(--green-800); border-top: 0; }
.spec-head:hover { background: var(--green-800); }
.spec-head > div {
  font-weight: 700; color: #fff !important; background: transparent !important;
}

/* AI */
.ai-card h3 { font-size: 22px; color: var(--green-700); }
.ai-tagline { font-size: 14px; color: var(--orange); font-weight: 600; margin: 4px 0 14px; }
.ai-card ul { list-style: none; }
.ai-card li {
  font-size: 14px; color: var(--muted); padding: 10px 0 10px 20px;
  border-top: 1px dashed var(--line); position: relative;
}
.ai-card li::before { content: "▸"; position: absolute; left: 0; color: var(--green-500); }
.ai-card li strong { color: var(--ink); }

.compare { margin-top: 72px; }
.compare-title { text-align: center; font-size: 26px; font-weight: 800; margin-bottom: 28px; }
.compare-table { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.compare-row {
  display: grid; grid-template-columns: 130px 1fr 1.4fr;
  background: #fff; border-top: 1px solid var(--line);
}
.compare-row > div { padding: 18px 22px; font-size: 15px; }
.compare-row > div:first-child { font-weight: 700; color: var(--green-700); }
.compare-row > div:nth-child(2) { color: var(--muted); background: #faf9f6; }
.compare-row .win { color: var(--ink); font-weight: 500; background: #f0faf3; }
.compare-head { background: var(--green-800); color: #fff; border-top: 0; }
.compare-head > div { font-weight: 700; background: transparent !important; color: #fff !important; }

.proof {
  margin-top: 72px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  background: linear-gradient(135deg, var(--green-800), var(--green-950));
  border-radius: var(--radius); padding: 44px 40px; color: #fff; text-align: center;
}
.proof-item strong {
  display: block; font-size: clamp(26px, 3vw, 38px); font-weight: 800;
  background: linear-gradient(90deg, var(--green-300), var(--amber));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.proof-item span { font-size: 13px; color: rgba(255, 255, 255, .7); display: inline-block; margin-top: 6px; }

/* CTA */
.cta-section { position: relative; color: #fff; overflow: hidden; background: var(--green-950); }
.cta-bg { position: absolute; inset: 0; background-size: cover; background-position: center; opacity: .35; }
.cta-section .container { position: relative; }
.cta-section .sec-eyebrow { color: var(--green-300); }
.vision-grid { margin-top: 40px; }
.vision {
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(74, 222, 128, .2);
  border-radius: var(--radius); padding: 26px;
}
.vision h4 { color: var(--green-300); font-size: 18px; margin-bottom: 8px; }
.vision p { font-size: 14px; color: rgba(255, 255, 255, .72); }
.cta-box {
  margin-top: 64px; text-align: center;
  background: rgba(6, 24, 15, .65); border: 1px solid rgba(74, 222, 128, .3);
  border-radius: 24px; padding: 56px 32px; backdrop-filter: blur(6px);
}
.cta-box h3 { font-size: clamp(24px, 3vw, 34px); font-weight: 800; }
.cta-box p { margin: 14px auto 30px; max-width: 560px; color: rgba(255, 255, 255, .72); }

/* Footer */
.footer { background: #04120b; color: rgba(255, 255, 255, .6); padding: 48px 0 0; }
.footer-inner {
  display: flex; justify-content: space-between; gap: 32px; flex-wrap: wrap;
  padding-bottom: 32px;
}
.footer .brand-text { color: #fff; font-size: 18px; }
.footer p { font-size: 14px; margin-top: 8px; }
.footer a { color: var(--green-300); }
.footer-contact { text-align: right; }
.footer-copy {
  text-align: center; font-size: 12px; padding: 18px 0;
  border-top: 1px solid rgba(255, 255, 255, .08); color: rgba(255, 255, 255, .35);
}

/* 滚动显现动画 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* 响应式 */
@media (max-width: 960px) {
  .grid-3, .grid-4, .proof { grid-template-columns: repeat(2, 1fr); }
  .spec-grid, .interact-grid { grid-template-columns: repeat(2, 1fr); }
  .product-gallery { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .product-gallery img { height: 200px; }
  .product-gallery figcaption { font-size: 12px; }
}
@media (max-width: 640px) {
  .nav-links {
    position: fixed; inset: 68px 0 auto 0; flex-direction: column;
    background: rgba(6, 24, 15, .97); padding: 24px; gap: 20px;
    transform: translateY(-130%); transition: transform .3s;
  }
  .nav-links.open { transform: none; }
  .nav-toggle { display: flex; }
  .grid-2, .grid-3, .grid-4, .proof { grid-template-columns: 1fr; }
  .spec-grid, .interact-grid { grid-template-columns: 1fr; }
  .layer { flex-direction: column; gap: 14px; }
  .layer-label { writing-mode: horizontal-tb; border-right: 0; border-bottom: 2px solid rgba(74, 222, 128, .35); padding: 0 0 8px; }
  .compare-row { grid-template-columns: 80px 1fr; }
  .compare-row > div:nth-child(2) { display: none; }
  .compare-head > div:nth-child(2) { display: none; }
  .compare-row .win { grid-column: 2; }
  .spec-row { grid-template-columns: 1fr; }
  .spec-row > div { padding: 10px 18px; }
  .spec-row > div:first-child { padding-bottom: 0; }
  .spec-row .gain { padding-bottom: 18px; }
  .spec-head { display: none; }
  .product-gallery { grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .product-gallery img { height: 130px; }
  .product-gallery figcaption { font-size: 11px; padding: 16px 10px 8px; }
  .hero-stats { gap: 28px; }
  .section { padding: 72px 0; }
  .footer-contact { text-align: left; }
}