/* ============================================================
   江苏昭硕付科技股份有限公司 官网样式
   设计方向：微软 Fluent Design — Acrylic 磨砂玻璃 / Mica 材质
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root {
  /* Fluent 主色（Windows 11 accent） */
  --accent: #0067c0;
  --accent-hover: #1975c5;
  --accent-soft: rgba(0, 103, 192, 0.08);
  --accent-line: rgba(0, 103, 192, 0.28);

  /* 文字 */
  --ink-900: #1b1b1b;
  --ink-700: #424242;
  --ink-500: #616161;

  /* Mica 底层 */
  --mica-1: #eef3fb;
  --mica-2: #e6ecf7;

  /* 玻璃面板 */
  --glass: rgba(255, 255, 255, 0.62);
  --glass-strong: rgba(255, 255, 255, 0.78);
  --glass-border: rgba(255, 255, 255, 0.65);
  --glass-line: rgba(0, 0, 0, 0.06);

  --blur: blur(24px) saturate(150%);

  --font-sans: "Segoe UI Variable Display", "Segoe UI", -apple-system,
    BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI",
    "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-2: 0 1px 2px rgba(0, 0, 0, 0.06), 0 2px 6px rgba(0, 0, 0, 0.05);
  --shadow-4: 0 2px 4px rgba(0, 0, 0, 0.06), 0 8px 20px rgba(0, 0, 0, 0.08);
  --shadow-8: 0 8px 16px rgba(0, 0, 0, 0.08), 0 24px 48px rgba(31, 55, 105, 0.14);

  --container: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--ink-900);
  background: var(--mica-1);
  -webkit-font-smoothing: antialiased;
}

/* Mica 渐变底 + 彩色光斑（固定，滚动不动） */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(46rem 32rem at 88% -8%, rgba(0, 120, 212, 0.20), transparent 62%),
    radial-gradient(38rem 28rem at -12% 30%, rgba(80, 140, 255, 0.16), transparent 58%),
    radial-gradient(40rem 30rem at 70% 108%, rgba(140, 110, 235, 0.14), transparent 60%),
    radial-gradient(30rem 24rem at 15% 95%, rgba(0, 183, 195, 0.12), transparent 55%),
    linear-gradient(165deg, var(--mica-1) 20%, var(--mica-2) 100%);
}

h1, h2, h3, p, dl, dd, dt, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }

a { color: inherit; text-decoration: none; }

img, svg { display: block; max-width: 100%; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1rem, 4vw, 2.5rem);
}

/* ---------- 顶部公告条 ---------- */
.topbar {
  background: rgba(0, 34, 68, 0.85);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.8rem;
}
.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 0.45rem;
}
.topbar-link {
  color: #fff;
  font-weight: 600;
  transition: color 150ms ease-out;
}
.topbar-link:hover { color: #8ecdf8; }

/* ---------- 头部导航（Acrylic） ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border-bottom: 1px solid var(--glass-line);
  transition: background 200ms ease-out, box-shadow 200ms ease-out;
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.72);
  box-shadow: var(--shadow-2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 64px;
}

.brand { display: flex; align-items: center; gap: 0.65rem; }
.brand-logo {
  height: 40px;
  width: auto;
  display: block;
  transition: transform 200ms ease-out;
}
.brand:hover .brand-logo { transform: scale(1.02); }

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(0.5rem, 2vw, 1.4rem);
}
.main-nav a {
  font-size: 0.94rem;
  font-weight: 500;
  color: var(--ink-700);
  padding: 0.4rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: background 150ms ease-out, color 150ms ease-out;
}
.main-nav a:hover { background: rgba(0, 0, 0, 0.045); color: var(--ink-900); }
.main-nav a.active { color: var(--accent); font-weight: 600; }

.nav-cta {
  background: var(--accent);
  color: #fff !important;
  padding: 0.45rem 1.2rem !important;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-2);
  transition: background 150ms ease-out, box-shadow 150ms ease-out;
}
.nav-cta:hover {
  background: var(--accent-hover) !important;
  box-shadow: var(--shadow-4);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: none;
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
}
.nav-toggle:hover { background: rgba(0, 0, 0, 0.05); }
.nav-toggle span {
  height: 2px;
  background: var(--ink-900);
  border-radius: 2px;
  transition: transform 200ms ease-out, opacity 200ms ease-out;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  overflow: hidden;
  color: var(--ink-900);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(34rem 22rem at 80% 0%, rgba(0, 120, 212, 0.22), transparent 60%),
    radial-gradient(26rem 20rem at 8% 100%, rgba(120, 100, 235, 0.16), transparent 58%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  padding-block: clamp(3.5rem, 8vw, 6.5rem);
}

/* 首屏双栏 */
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}
.hero-copy .hero-eyebrow,
.hero-copy h1,
.hero-copy .hero-sub,
.hero-copy .hero-actions { opacity: 0; translate: 0 16px; animation: heroUp 600ms ease-out forwards; }
.hero-copy h1 { animation-delay: 80ms; }
.hero-copy .hero-sub { animation-delay: 160ms; }
.hero-copy .hero-actions { animation-delay: 240ms; }
@keyframes heroUp { to { opacity: 1; translate: 0 0; } }

/* —— 产品样机（纯 CSS）—— */
.hero-visual {
  position: relative;
  opacity: 0;
  translate: 0 24px;
  animation: heroUp 700ms ease-out 320ms forwards;
}
.mockup {
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-8);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  overflow: hidden;
}
.mockup-bar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 0.7rem 1rem;
  border-bottom: 1px solid var(--glass-line);
  background: rgba(255, 255, 255, 0.5);
}
.mockup-bar span { width: 10px; height: 10px; border-radius: 50%; background: rgba(0, 0, 0, 0.12); }
.mockup-bar span:nth-child(1) { background: #f5726d; }
.mockup-bar span:nth-child(2) { background: #f7b955; }
.mockup-bar span:nth-child(3) { background: #58c76f; }
.mockup-bar em {
  margin-left: auto;
  font-style: normal;
  font-size: 0.74rem;
  color: var(--ink-500);
}
.mockup-body { padding: 1.1rem 1.2rem 1.3rem; }
.mockup-kpi { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.6rem; }
.kpi {
  border-radius: var(--radius-md);
  padding: 0.65rem 0.8rem;
  border: 1px solid var(--glass-line);
  background: rgba(255, 255, 255, 0.55);
}
.kpi b { display: block; font-size: 0.7rem; font-weight: 500; color: var(--ink-500); }
.kpi strong { font-size: 0.92rem; font-weight: 700; color: var(--ink-900); }
.kpi-blue { border-left: 3px solid #0078d4; }
.kpi-violet { border-left: 3px solid #7a5af8; }
.kpi-teal { border-left: 3px solid #00b7c3; }
.mockup-chart {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 92px;
  margin-top: 0.9rem;
  padding: 0.7rem 0.8rem 0;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  border: 1px solid var(--glass-line);
  border-bottom: none;
  background: rgba(255, 255, 255, 0.4);
}
.mockup-chart i {
  flex: 1;
  height: var(--h, 40%);
  border-radius: 4px 4px 0 0;
  background: linear-gradient(180deg, #4c8dff, rgba(0, 103, 192, 0.55));
  transform-origin: bottom;
  animation: barGrow 900ms cubic-bezier(0.22, 1, 0.36, 1) backwards;
}
.mockup-chart i:nth-child(2) { animation-delay: 80ms; }
.mockup-chart i:nth-child(3) { animation-delay: 160ms; }
.mockup-chart i:nth-child(4) { animation-delay: 240ms; background: linear-gradient(180deg, #8d78ff, rgba(122, 90, 248, 0.55)); }
.mockup-chart i:nth-child(5) { animation-delay: 320ms; }
.mockup-chart i:nth-child(6) { animation-delay: 400ms; background: linear-gradient(180deg, #8d78ff, rgba(122, 90, 248, 0.55)); }
.mockup-chart i:nth-child(7) { animation-delay: 480ms; background: linear-gradient(180deg, #37c6cf, rgba(0, 183, 195, 0.55)); }
@keyframes barGrow { from { transform: scaleY(0); } }
.mockup-rows {
  border: 1px solid var(--glass-line);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  background: rgba(255, 255, 255, 0.4);
  padding: 0.5rem 0.8rem 0.7rem;
}
.mockup-rows .row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0;
  font-size: 0.82rem;
  color: var(--ink-700);
}
.mockup-rows .row + .row { border-top: 1px dashed var(--glass-line); }
.mockup-rows .row b { font-weight: 650; color: var(--ink-900); }
.mockup-rows .dot { width: 9px; height: 9px; border-radius: 50%; }
.dot-blue { background: #0078d4; }
.dot-violet { background: #7a5af8; }
.dot-teal { background: #00b7c3; }
.mockup-rows .grow { flex: 1; height: 8px; border-radius: 4px; background: linear-gradient(90deg, rgba(0, 103, 192, 0.25), rgba(0, 103, 192, 0.06)); }

/* —— 漂浮玻璃标签 —— */
.float-chip {
  position: absolute;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  padding: 0.35rem 0.95rem;
  box-shadow: var(--shadow-4);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  animation: chipFloat 6s ease-in-out infinite;
}
.chip-a { top: -14px; right: 8%; }
.chip-b { bottom: 22%; left: -22px; animation-delay: 1.5s; color: #7a5af8; }
.chip-c { bottom: -16px; right: 22%; animation-delay: 3s; color: #009aa5; }
@keyframes chipFloat {
  0%, 100% { translate: 0 0; }
  50% { translate: 0 -8px; }
}
.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  background: var(--glass-strong);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  padding: 0.3rem 1rem;
  margin-bottom: 1.5rem;
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}
.hero h1 {
  font-size: clamp(2.1rem, 1.4rem + 3.4vw, 3.6rem);
  line-height: 1.18;
  font-weight: 650;
  letter-spacing: 0.005em;
  max-width: 22ch;
  color: var(--ink-900);
}
.hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent), #7a5af8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  margin-top: 1.4rem;
  max-width: 38em;
  font-size: clamp(1rem, 0.95rem + 0.4vw, 1.15rem);
  color: var(--ink-700);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin-top: 3rem;
  padding: 1.4rem 1.6rem;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-4);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  max-width: 900px;
}
.hero-stats > div {
  border-left: 3px solid var(--accent);
  padding-left: 0.9rem;
}
.hero-stats dt {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.2;
}
.hero-stats dd {
  font-size: 0.85rem;
  color: var(--ink-500);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.55rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: 0.96rem;
  font-weight: 600;
  transition: background 150ms ease-out, transform 150ms ease-out,
    border-color 150ms ease-out, color 150ms ease-out, box-shadow 150ms ease-out;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-2);
}
.btn-primary:hover { background: var(--accent-hover); box-shadow: var(--shadow-4); }
.btn-ghost {
  background: var(--glass-strong);
  border: 1px solid rgba(0, 0, 0, 0.12);
  color: var(--ink-900);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}
.btn-ghost:hover { background: #fff; border-color: rgba(0, 0, 0, 0.2); }

/* ---------- 通用区块 ---------- */
.section { padding-block: clamp(3.2rem, 6vw, 5.5rem); }
.section-alt { background: transparent; }

.section-head { max-width: 640px; margin-bottom: clamp(2rem, 4vw, 2.8rem); }
.section-head-left { margin-inline: 0; }
.eyebrow {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 0.2rem 0.85rem;
  margin-bottom: 0.7rem;
}
.section-head h2 {
  position: relative;
  padding-left: 0.9rem;
  font-size: clamp(1.7rem, 1.3rem + 1.8vw, 2.3rem);
  line-height: 1.22;
  font-weight: 650;
  color: var(--ink-900);
}
.section-head h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.28em;
  bottom: 0.28em;
  width: 4px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--accent), #7a5af8);
}
.section-sub {
  margin-top: 0.7rem;
  color: var(--ink-500);
  font-size: 1.02rem;
}

/* 玻璃卡片通用 */
.glass-card,
.service-card,
.strength-item,
.process-step,
.contact-item {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-2);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  transition: transform 200ms ease-out, box-shadow 200ms ease-out,
    background 200ms ease-out;
}

/* ---------- 业务体系 ---------- */
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 250px), 1fr));
  gap: 1.2rem;
}
.service-card { position: relative; overflow: hidden; padding: 1.8rem 1.6rem; }
/* 悬停顶部光带 */
.service-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, #0078d4, #7a5af8, #00b7c3);
  opacity: 0;
  transition: opacity 250ms ease-out;
}
.service-card:hover::before { opacity: 1; }
.service-card:hover {
  transform: translateY(-4px);
  background: var(--glass-strong);
  box-shadow: var(--shadow-8);
}
.service-icon {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(0, 120, 212, 0.14), rgba(122, 90, 248, 0.12));
  color: var(--accent);
  margin-bottom: 1.1rem;
  border: 1px solid rgba(0, 120, 212, 0.18);
  transition: transform 250ms ease-out;
}
.service-card:hover .service-icon { transform: scale(1.06) rotate(-3deg); }
.service-icon svg { width: 26px; height: 26px; }
.service-card h3 {
  font-size: 1.15rem;
  font-weight: 650;
  color: var(--ink-900);
  margin-bottom: 0.55rem;
}
.service-card p {
  font-size: 0.93rem;
  color: var(--ink-700);
}
.service-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 1.1rem;
}
.service-tags li {
  font-size: 0.75rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  padding: 0.16rem 0.7rem;
}

/* ---------- 核心优势 ---------- */
.strength-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 1.2rem;
}
.strength-item { padding: 1.6rem 1.5rem; }
.strength-item:hover { background: var(--glass-strong); box-shadow: var(--shadow-4); }
.strength-num {
  display: inline-grid;
  place-items: center;
  min-width: 44px;
  height: 30px;
  padding-inline: 0.6rem;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(120deg, var(--accent), #7a5af8);
  line-height: 1;
}
.strength-item h3 {
  margin-top: 0.9rem;
  font-size: 1.05rem;
  font-weight: 650;
  color: var(--ink-900);
}
.strength-item p {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: var(--ink-700);
}

/* ---------- 服务流程 ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
  gap: 1.2rem;
}
.process-step { padding: 1.5rem 1.4rem; }
.process-step:hover { background: var(--glass-strong); box-shadow: var(--shadow-4); }
.step-no {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  margin-bottom: 0.9rem;
  box-shadow: var(--shadow-2);
}
.process-step h3 { font-size: 1.02rem; font-weight: 650; color: var(--ink-900); }
.process-step p {
  margin-top: 0.45rem;
  font-size: 0.9rem;
  color: var(--ink-700);
}

/* ---------- 关于我们 ---------- */
.about-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(1.8rem, 5vw, 3.5rem);
  align-items: center;
}
.about-text p { margin-top: 1rem; color: var(--ink-700); }
.about-text strong { color: var(--accent); font-weight: 650; }
.about-points { margin-top: 1.3rem; }
.about-points li {
  position: relative;
  padding-left: 1.6rem;
  margin-top: 0.55rem;
  color: var(--ink-700);
  font-size: 0.95rem;
}
.about-points li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0.05em;
  display: grid;
  place-items: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.65rem;
  font-weight: 700;
}
.about-card {
  background: var(--glass-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  box-shadow: var(--shadow-4);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
}
.about-card-head {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--ink-500);
  border-bottom: 1px solid var(--glass-line);
  padding-bottom: 1rem;
}
.about-card-body {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.3rem;
}
.chip {
  font-size: 0.85rem;
  padding: 0.35rem 0.95rem;
  border-radius: var(--radius-sm);
  background: var(--glass);
  border: 1px solid rgba(0, 0, 0, 0.08);
  color: var(--ink-700);
  transition: background 150ms ease-out, color 150ms ease-out,
    border-color 150ms ease-out;
}
.chip:hover {
  background: var(--accent-soft);
  border-color: var(--accent-line);
  color: var(--accent);
}

/* ---------- 联系我们 ---------- */
.contact .section-head { margin-inline: auto; text-align: center; }
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: 1.2rem;
}
.contact-item { padding: 1.6rem 1.5rem; text-align: center; }
.contact-item:hover { background: var(--glass-strong); box-shadow: var(--shadow-4); }
.contact-item h3 {
  font-size: 1rem;
  font-weight: 650;
  color: var(--ink-900);
  margin-bottom: 0.5rem;
}
.contact-item p { font-size: 0.92rem; color: var(--ink-700); }
.contact-cta { text-align: center; margin-top: 2rem; }

/* ---------- 页脚（深色 Mica） ---------- */
.site-footer {
  background: rgba(16, 24, 40, 0.82);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  color: rgba(255, 255, 255, 0.72);
  padding-top: 2.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-inner {
  display: grid;
  grid-template-columns: minmax(280px, 1.2fr) auto auto;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand > div { min-width: 0; }
.footer-brand { display: flex; gap: 0.9rem; align-items: flex-start; }
.footer-logo {
  display: inline-block;
  flex: none;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 0.4rem 0.6rem;
  box-shadow: var(--shadow-2);
}
.footer-logo img { height: 32px; width: auto; display: block; }

/* —— 官方账号二维码 —— */
.footer-qr-title {
  font-size: 0.95rem;
  font-weight: 650;
  color: #fff;
  margin-bottom: 0.7rem;
}
.qr-row { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.qr-row figure {
  margin: 0;
  text-align: center;
  position: relative;
  z-index: 1;
}
.qr-row img {
  display: block;
  width: 54px;
  height: 54px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 3px;
  transition: transform 200ms ease-out, box-shadow 200ms ease-out;
}
.qr-row figcaption {
  margin-top: 0.3rem;
  font-size: 0.68rem;
  color: rgba(255, 255, 255, 0.6);
  white-space: nowrap;
}
.qr-row figure:hover { z-index: 10; }
.qr-row figure:hover img {
  transform: scale(2.2);
  box-shadow: var(--shadow-8);
}
/* 放大后锚定，避免溢出裁切 */
.qr-row figure:first-child:hover img { transform-origin: left center; }
.qr-row figure:last-child:hover img { transform-origin: right center; }
.footer-brand strong {
  display: block;
  color: #fff;
  font-size: 1.05rem;
  margin-bottom: 0.35rem;
}
.footer-brand p { font-size: 0.85rem; }
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  align-items: center;
  font-size: 0.9rem;
}
.footer-nav a {
  padding: 0.3rem 0.6rem;
  border-radius: var(--radius-sm);
  transition: color 150ms ease-out, background 150ms ease-out;
}
.footer-nav a:hover { color: #fff; background: rgba(255, 255, 255, 0.08); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem 2rem;
  padding-block: 1.2rem;
  font-size: 0.82rem;
}
.footer-bottom a {
  color: rgba(255, 255, 255, 0.85);
  transition: color 150ms ease-out;
}
.footer-bottom a:hover { color: #8ecdf8; }

/* ---------- 入场动画 ---------- */
.reveal {
  opacity: 0;
  translate: 0 18px;
  transition: opacity 500ms ease-out, translate 500ms ease-out;
}
.reveal.is-visible {
  opacity: 1;
  translate: 0 0;
}
/* 同排卡片错峰入场 */
.service-grid .reveal:nth-child(2),
.strength-grid .reveal:nth-child(2),
.process-grid .reveal:nth-child(2) { transition-delay: 80ms; }
.service-grid .reveal:nth-child(3),
.strength-grid .reveal:nth-child(3),
.process-grid .reveal:nth-child(3) { transition-delay: 160ms; }
.service-grid .reveal:nth-child(4),
.strength-grid .reveal:nth-child(4),
.process-grid .reveal:nth-child(4) { transition-delay: 240ms; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; translate: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .about-inner { grid-template-columns: 1fr; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { max-width: 520px; margin-inline: auto; width: 100%; }
  .chip-b { left: -6px; }
}

@media (max-width: 1100px) {
  .footer-inner { grid-template-columns: 1fr auto; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  .topbar-inner { justify-content: center; }
  .topbar-link { display: none; }

  .nav-toggle { display: flex; }
  .main-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: var(--blur);
    -webkit-backdrop-filter: var(--blur);
    border-bottom: 1px solid var(--glass-line);
    box-shadow: var(--shadow-4);
    padding: 0.6rem 1.2rem 1.2rem;
    display: none;
  }
  .main-nav.is-open { display: flex; }
  .main-nav a {
    padding: 0.8rem 0.6rem;
    font-size: 1rem;
  }
  .main-nav .nav-cta {
    margin-top: 0.9rem;
    text-align: center;
  }

  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .brand-logo { height: 32px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-qr { justify-self: start; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
}