/* ============================================================
   上海叁清光伏 -- 设计令牌与结构性样式
   仅包含：:root 令牌、@keyframes、[data-reveal] 过渡、
   导航与移动端菜单结构、图标尺寸、减少动效覆盖。
   ============================================================ */

:root {
  /* 品牌色 -- 绿能清透 */
  --color-primary: #2F6F52;
  --color-primary-light: #4A8F6C;
  --color-primary-dark: #224F3A;
  --color-accent: #C0E0C0;

  --color-bg: #ffffff;
  --color-bg-alt: #F4F8F4;
  --color-bg-deep: #10231A;
  --color-text: #16211B;
  --color-text-muted: #5A6B60;
  --color-border: #E1E9E2;

  /* 字体 */
  --font-heading: 'Noto Serif SC', 'Source Han Serif SC', Georgia, 'Songti SC', serif;
  --font-body: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* 布局 */
  --max-width: 1200px;

  /* ── Standard Tokens (auto-injected) ── */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --radius-default: 4px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
}

html { scroll-behavior: smooth; }
body { margin: 0; }
body { font-family: var(--font-body); }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading, var(--font-body)); }

/* -- 滚动揭示动画 -- */
[data-reveal] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-stagger] > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
[data-reveal-stagger].is-visible > *:nth-child(1) { transition-delay: 0ms; }
[data-reveal-stagger].is-visible > *:nth-child(2) { transition-delay: 100ms; }
[data-reveal-stagger].is-visible > *:nth-child(3) { transition-delay: 200ms; }
[data-reveal-stagger].is-visible > *:nth-child(4) { transition-delay: 300ms; }
[data-reveal-stagger].is-visible > *:nth-child(5) { transition-delay: 400ms; }
[data-reveal-stagger].is-visible > *:nth-child(6) { transition-delay: 500ms; }
[data-reveal-stagger].is-visible > * { opacity: 1; transform: translateY(0); }

/* -- 关键帧 -- */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}
@keyframes scrollBob {
  0%, 100% { transform: translateY(0); opacity: 0.55; }
  50% { transform: translateY(8px); opacity: 1; }
}

/* -- 图标 -- */
.icon {
  display: inline-block;
  width: 1.25em;
  height: 1.25em;
  vertical-align: -0.15em;
  flex-shrink: 0;
}
.icon.hidden { display: none; }
.icon-sm { width: 1em; height: 1em; }
.icon-lg { width: 1.5em; height: 1.5em; }
.icon-xl { width: 2em; height: 2em; }

/* -- 站点头部 -- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10000;
  width: 100%;
  border-bottom: 1px solid rgba(225, 233, 226, 0.7);
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: box-shadow 0.3s ease, background-color 0.3s ease;
}
.site-header.is-scrolled {
  box-shadow: 0 4px 12px rgba(16, 35, 26, 0.08);
  background-color: rgba(255, 255, 255, 0.97);
}
.nav-inner {
  width: min(100% - 3rem, var(--max-width));
  min-height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--color-primary-dark);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: 0.02em;
}
.nav-logo img {
  width: 40px;
  height: auto;
  object-fit: contain;
}
.nav-desktop ul {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}
.nav-link {
  display: inline-block;
  padding: 0.35rem 0;
  color: var(--color-text-muted);
  font-size: 0.9375rem;
  position: relative;
  transition: color 0.25s cubic-bezier(0.33, 1, 0.68, 1);
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.3s cubic-bezier(0.33, 1, 0.68, 1);
}
.nav-link:hover,
.nav-link.is-active {
  color: var(--color-primary);
}
.nav-link:hover::after,
.nav-link.is-active::after {
  width: 100%;
}

/* -- 移动端汉堡按钮 -- */
.nav-toggle {
  display: none;
  border: 0;
  background: transparent;
  color: var(--color-primary-dark);
  padding: 0.5rem;
  cursor: pointer;
}
.nav-toggle .icon { width: 1.6rem; height: 1.6rem; }

/* -- 移动端菜单 -- */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 9999;
  background-color: var(--color-bg);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 6rem 1.5rem 2rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.3s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}
.mobile-menu.is-open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.mobile-menu nav ul {
  display: grid;
  gap: 0.35rem;
}
.mobile-nav-link {
  display: block;
  padding: 0.95rem 0.5rem;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 1.25rem;
}
.mobile-nav-link.is-active { color: var(--color-primary); }
.mobile-menu-close {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: var(--color-text);
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
}

/* -- 页脚 -- */
.site-footer {
  background-color: var(--color-bg-deep);
  color: #D7E3DA;
}
.footer-inner {
  width: min(100% - 3rem, var(--max-width));
  margin: 0 auto;
  padding: 4rem 0 2.5rem;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: 3rem;
}
.footer-brand img {
  width: 44px;
  height: auto;
  margin-bottom: 1rem;
  filter: brightness(1.6);
}
.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.75rem;
}
.footer-brand-desc {
  max-width: 32rem;
  color: #9FB4A6;
  line-height: 1.8;
  font-size: 0.9375rem;
}
.footer-heading {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 1rem;
}
.footer-nav ul li + li,
.footer-service ul li + li { margin-top: 0.625rem; }
.footer-nav a,
.footer-service li {
  color: #9FB4A6;
  font-size: 0.9375rem;
  line-height: 1.7;
  transition: color 0.25s ease;
}
.footer-nav a:hover { color: #ffffff; }
.footer-bottom {
  width: min(100% - 3rem, var(--max-width));
  margin: 0 auto;
  padding: 1.5rem 0 2rem;
  border-top: 1px solid rgba(159, 180, 166, 0.2);
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  justify-content: space-between;
  color: #7C9184;
  font-size: 0.8125rem;
}

@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .nav-inner { width: min(100% - 2rem, var(--max-width)); min-height: 68px; }
  .nav-desktop { display: none; }
  .nav-toggle { display: inline-flex; }
  .footer-inner { grid-template-columns: 1fr; gap: 2.25rem; width: min(100% - 2rem, var(--max-width)); padding-top: 3rem; }
  .footer-bottom { width: min(100% - 2rem, var(--max-width)); }
}

/* -- 减少动效 -- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* GEO deterministic responsive media */
:root { --color-primary: var(--c-primary-500, #2563eb); }
img { max-width: 100%; height: auto; }
.product-card img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: contain !important;
  object-position: center;
}
[data-reveal],
[data-reveal-stagger] > * {
  opacity: 1 !important;
  transform: none !important;
}
.nav-logo-img {
  display: block;
  width: auto;
  height: 48px;
  max-width: 180px;
  object-fit: contain;
}
.footer-brand img,
.footer-logo-img {
  width: auto;
  height: 56px;
  max-width: 200px;
  object-fit: contain;
}
.hero-section {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #fff 0%, #f8fafc 62%, color-mix(in srgb, var(--color-primary) 7%, #fff) 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 88% 18%, color-mix(in srgb, var(--color-primary) 9%, transparent), transparent 34%);
}
.hero-content,
.container,
.section-inner {
  width: min(100% - 3rem, var(--max-width));
  margin-inline: auto;
}
.hero-content { position: relative; z-index: 1; padding-block: clamp(5rem, 10vw, 9rem); }
.hero-eyebrow,
.section-eyebrow { margin: 0 0 0.875rem; color: var(--color-primary); font-size: 0.8125rem; font-weight: 750; letter-spacing: 0.12em; text-transform: uppercase; }
.hero-title { max-width: 880px; margin: 0; color: #0f172a; font-size: clamp(2.5rem, 6vw, 5rem); font-weight: 780; letter-spacing: -0.045em; line-height: 1.04; }
.hero-subtitle { max-width: 720px; margin: 1.5rem 0 0; color: #475569; font-size: clamp(1.05rem, 2vw, 1.25rem); line-height: 1.8; }
.hero-actions,
.section-cta { display: flex; flex-wrap: wrap; gap: 0.875rem; margin-top: 2rem; }
.btn { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 0.75rem 1.35rem; border: 1px solid transparent; border-radius: var(--radius-md); font-weight: 700; transition: transform 160ms ease, box-shadow 160ms ease; }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-outline { border-color: #cbd5e1; background: #fff; color: #0f172a; }
.trust-bar { border-block: 1px solid #e2e8f0; background: #fff; }
.trust-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem; padding-block: 1.25rem; }
.trust-item { display: flex; align-items: center; gap: 0.75rem; color: #334155; font-weight: 650; }
.section { padding-block: clamp(4.5rem, 8vw, 7rem); }
.section-alt { background: #f8fafc; }
.section-brand { background: color-mix(in srgb, var(--color-primary) 4%, #fff); }
.section-head { max-width: 760px; margin-bottom: 2.5rem; }
.section-title { margin: 0; color: #0f172a; font-size: clamp(2rem, 4vw, 3rem); font-weight: 760; letter-spacing: -0.035em; line-height: 1.15; }
.section-lead { margin: 1rem 0 0; color: #64748b; font-size: 1.0625rem; line-height: 1.8; }
.grid-cols-3,
.process-grid,
.scenario-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.process-grid,
.scenario-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card,
.process-step,
.scenario-item { padding: 1.5rem; border: 1px solid #e2e8f0; border-radius: var(--radius-lg); background: #fff; box-shadow: var(--shadow-sm); }
.card-title { margin: 0.875rem 0 0; color: #0f172a; font-size: 1.125rem; font-weight: 720; }
.card-text { margin: 0.75rem 0 0; color: #64748b; line-height: 1.75; }
.process-number { color: var(--color-primary); font-size: 0.875rem; font-weight: 800; letter-spacing: 0.12em; }
.cert-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.25rem; }
.cert-card {
  margin: 0;
  padding: 0.75rem;
  overflow: hidden;
  border: 1px solid #e5e2dc;
  border-radius: 0.75rem;
  background: #fff;
}
.cert-item {
  margin: 0;
  padding: 0.75rem;
  overflow: hidden;
  border: 1px solid #e5e2dc;
  border-radius: 0.75rem;
  background: #fff;
}
.cert-card img,
.cert-item img,
.cert-img {
  display: block;
  width: 100%;
  height: clamp(220px, 32vw, 420px);
  object-fit: contain;
  object-position: center;
  background: #f8f7f4;
}
.cert-card figcaption,
.cert-item figcaption,
.cert-caption {
  margin-top: 0.625rem;
  color: #555;
  font-size: 0.875rem;
  line-height: 1.5;
  text-align: center;
}
@media (max-width: 767px) {
  .nav-logo-img { height: 42px; max-width: 150px; }
  .hero-content,
  .container,
  .section-inner { width: min(100% - 2rem, var(--max-width)); }
  .hero-content { padding-block: 4.5rem; }
  .trust-list,
  .grid-cols-3,
  .process-grid,
  .scenario-grid,
  .cert-grid { grid-template-columns: 1fr; }
  .cert-card img,
  .cert-item img,
  .cert-img { height: auto; max-height: 420px; }
}

/* GEO platform lead component */
.geo-lead-card{position:relative;z-index:20;display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:clamp(2rem,5vw,5rem);width:min(100% - 3rem,var(--max-width,1200px));margin-inline:auto;padding:clamp(2rem,5vw,4.5rem);border:1px solid #e2e8f0;border-radius:var(--radius-lg,20px);background:#fff;box-shadow:var(--shadow-md,0 18px 48px rgba(15,23,42,.08))}[id="contact"]>.absolute.inset-0{pointer-events:none!important;z-index:0!important}.geo-lead-copy>span{color:var(--color-primary);font-size:.75rem;font-weight:800;letter-spacing:.16em}.geo-lead-copy h2{margin:.75rem 0 1rem;color:#0f172a;font-size:clamp(2rem,4vw,3rem);line-height:1.15}.geo-lead-copy p{color:#64748b;line-height:1.8}.geo-lead-form{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem}.geo-lead-form label{display:grid;gap:.5rem;color:#334155;font-size:.875rem;font-weight:650}.geo-lead-form input,.geo-lead-form textarea{width:100%;box-sizing:border-box;border:1px solid #cbd5e1;border-radius:10px;background:#fff;padding:.8rem .9rem;color:#0f172a;font:inherit}.geo-lead-form input:focus,.geo-lead-form textarea:focus{outline:3px solid color-mix(in srgb,var(--color-primary) 18%,transparent);border-color:var(--color-primary)}.geo-lead-wide{grid-column:1/-1}.geo-lead-consent{display:flex!important;grid-template-columns:auto 1fr!important;align-items:flex-start}.geo-lead-consent input{width:auto;margin-top:.2rem}.geo-lead-actions{display:flex;align-items:center;gap:1rem;flex-wrap:wrap}.geo-lead-actions button{min-height:48px;border:0;border-radius:10px;padding:.75rem 1.5rem;background:var(--color-primary);color:#fff;font:inherit;font-weight:750;cursor:pointer}.geo-lead-actions button:disabled{cursor:wait;opacity:.65}.geo-lead-actions p{margin:0;color:#475569}.geo-lead-honeypot{position:absolute!important;left:-9999px!important;width:1px!important;height:1px!important;overflow:hidden!important}@media(max-width:767px){.geo-lead-card{grid-template-columns:1fr;width:min(100% - 2rem,var(--max-width,1200px));padding:1.5rem}.geo-lead-form{grid-template-columns:1fr}.geo-lead-wide{grid-column:auto}}